Three-way switch valve with locking function

Abstract

The utility model relates to the technical field of flow valves, in particular to a three-way switch valve with a locking function, which comprises a three-way valve assembly, the three-way valve assembly comprises a valve core, the valve core is arranged in the three-way valve assembly, and the valve core is rotatably arranged; the three fluid valve ports are formed in the three-way valve assembly respectively, and circulation of the fluid valve ports is switched through rotation of the valve element; the rotating handle is fixedly connected with the valve element and used for driving the valve element to rotate; the locking mechanism is arranged on the rotating handle, a locking pin is arranged on the locking mechanism, a locking hole is formed in the position, corresponding to the locking pin, of the three-way valve assembly, and when the locking pin is inserted into the locking hole, rotation of the rotating handle is limited. According to the utility model, the valve can be ensured not to change accidentally at a specific position. The problem that a valve element of a traditional three-way ball valve shifts due to external factors is solved, and meanwhile the requirements for rapid emptying and fluid switching in air source treatment can be met.

Description

Technical Field

[0001] This utility model relates to the field of flow valve technology, and in particular to a three-way switch valve with a locking function. Background Technology

[0002] In large-scale gas source processing systems, a shut-off valve with a shut-off function needs to be installed at the front end of the gas source processing triplet to open or close the gas source. This shut-off valve is generally a common shut-off valve or a three-way ball valve.

[0003] If a regular shut-off valve is used, the pressure downstream of the valve cannot be quickly released after it is closed, making it impossible to determine whether the working status of some devices downstream of the valve is normal, and even implying a certain degree of danger.

[0004] If a standard three-way ball valve is used, the valve does not have a locking function after opening and closing, and the valve core (ball) is prone to displacement when vibrating or encountering a flat handle.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the general background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] This invention provides a three-way switch valve with a locking function, thereby effectively solving the problems in the background art.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is: a three-way switch valve with a locking function, comprising:

[0008] A three-way valve assembly, the three-way valve assembly comprising:

[0009] A valve core is disposed inside the three-way valve assembly and is rotatably mounted.

[0010] Three fluid valve ports are respectively disposed on the three-way valve assembly, and the flow of the fluid valve ports is switched by the rotation of the valve core;

[0011] A rotating handle, which is fixedly connected to the valve core, is used to drive the rotation of the valve core;

[0012] A locking mechanism is provided on the rotary handle, and a locking pin is provided on the locking mechanism. A locking hole is provided on the three-way valve assembly corresponding to the locking pin. When the locking pin is inserted into the locking hole, the rotary handle is restricted from rotating.

[0013] Furthermore, the rotary handle has a rotary seat at one end near the valve core, and the rotary seat has a sliding groove at the other end away from the valve core. The locking mechanism is disposed in the sliding groove and slides along the sliding groove.

[0014] When the locking mechanism slides along the slide groove, the locking pin engages or disengages with the locking hole to lock or unlock the rotating handle.

[0015] Furthermore, the locking mechanism includes:

[0016] A locking block is disposed in the sliding groove, and a locking groove is provided at one end of the locking block near the locking hole. The locking pin is at least partially located in the locking groove and cooperates with the locking groove.

[0017] The locking groove is parallel to the sliding groove, and the locking groove includes a first stepped surface and a second stepped surface. The distance between the first stepped surface and the locking hole is greater than the distance between the second stepped surface.

[0018] An elastic mechanism is provided on the rotating seat and sleeved on the locking pin, restricting the locking pin from moving towards the locking hole;

[0019] When the locking block slides to the first stepped surface and engages with the locking pin, the elastic mechanism pops out the locking pin, unlocking the rotary handle; when the locking block slides to the second stepped surface and engages with the locking pin, the elastic mechanism is compressed, and the locking pin is inserted into the locking hole, locking the rotary handle.

[0020] Furthermore, the locking pin, locking hole, locking groove, and elastic mechanism are provided in two sets, and the two sets are arranged symmetrically.

[0021] Furthermore, the elastic mechanism includes:

[0022] A compression spring is sleeved on the locking pin. The rotating seat is provided with a receiving hole, the compression spring is located in the receiving hole, and the receiving hole is provided with a through hole near the locking hole, the diameter of the through hole being smaller than the diameter of the receiving hole.

[0023] A baffle is provided at the end of the receiving hole away from the through hole. A retaining edge is provided on the locking pin. The retaining edge cooperates with the baffle to prevent the locking pin from disengaging from the receiving hole.

[0024] Furthermore, the three-way valve assembly also includes a rotation limiting assembly, the rotation limiting assembly comprising:

[0025] A rotating shaft is disposed on the rotating handle, and a rotating limiting groove is provided on the rotating shaft along the rotation direction. The rotating limiting groove includes an arc surface and a plane.

[0026] A rotary limiting pin, wherein the rotary limiting pin is partially located within the rotary limiting groove and is fixedly mounted on the three-way valve assembly;

[0027] When the rotating shaft rotates, the rotating limiting shaft engages with the arc surface in the rotating limiting groove. When the rotating shaft rotates to the point where the rotating limiting shaft engages with the plane, the plane engages with the rotating limiting shaft to restrict the rotation of the rotating shaft.

[0028] Furthermore, the angle of the arc surface is 90 degrees. After the rotating shaft rotates 90 degrees, the plane and the rotating limiting shaft cooperate with each other to restrict the rotation of the rotating shaft.

[0029] Furthermore, the valve core includes an air inlet and an air outlet, which are configured as rectangular structures with partially circular arcs.

[0030] Furthermore, the valve body of the three-way valve assembly is configured as a cubic structure.

[0031] The beneficial effects of this invention are as follows: The locking mechanism includes a locking pin, which is connected to the rotary handle. When the locking pin is inserted into the corresponding locking hole on the three-way valve assembly, the engagement between the locking pin and the locking hole restricts the rotation of the rotary handle, preventing valve core displacement due to external vibration or human operation. This function ensures that the valve will not undergo unexpected changes in a specific position. It solves the problem of valve core displacement caused by external factors in traditional three-way ball valves, while also meeting the requirements for rapid venting and fluid switching in air source processing. Attached Figure Description

[0032] 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 or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of a three-way switch valve;

[0034] Figure 2 for Figure 1 Exploded view in the image;

[0035] Figure 3 A schematic diagram of the locking pin and locking hole;

[0036] Figure 4 for Figure 1 A sectional view;

[0037] Figure 5 A schematic diagram of the locking block and locking pin;

[0038] Figure 6 This is a schematic diagram of the locking groove structure;

[0039] Figure 7 This is a schematic diagram of the rotating handle.

[0040] Figure 8 A schematic diagram of the locking pin and the elastic mechanism;

[0041] Figure 9 A schematic diagram of the rotating handle and the rotating limit assembly;

[0042] Figure 10 for Figure 9 Front view;

[0043] Figure 11 for Figure 10 A sectional view along the center CC;

[0044] Figure 12 This is a cross-sectional view of the rotating limiting groove;

[0045] Figure 13 This is a schematic diagram of the valve core structure;

[0046] Figure 14 This is a schematic diagram of the valve core from another angle.

[0047] Figure 15 This is a cross-sectional view of a three-way switch valve.

[0048] Reference numerals: 1. Three-way valve assembly; 11. Valve core; 111. Air inlet; 112. Air outlet; 12. Fluid valve port; 13. Rotary handle; 131. Rotary seat; 1311. Slide groove; 1312. Receiving hole; 14. Rotation limit assembly; 141. Rotation shaft; 142. Rotation limit groove; 1421. Arc surface; 1422. Plane; 143. Rotation limit pin; 2. Locking mechanism; 21. Locking pin; 211. Edge retainer; 22. Locking hole; 23. Locking block; 231. Locking groove; 2311. First step surface; 2312. Second step surface; 232. Elastic mechanism; 2321. Compression spring; 2322. Baffle. Detailed Implementation

[0049] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0050] like Figures 1 to 15 As shown: A three-way switch valve with a locking function, comprising:

[0051] Three-way valve assembly 1, the three-way valve assembly 1 includes:

[0052] Valve core 11 is located inside the three-way valve assembly 1 and is rotatably mounted.

[0053] Three fluid valve ports 12 are respectively provided on the three-way valve assembly 1, and the flow of fluid valve ports 12 is switched by the rotation of valve core 11;

[0054] Rotary handle 13 is fixedly connected to valve core 11 and is used to drive the rotation of valve core 11;

[0055] The locking mechanism 2 is mounted on the rotary handle 13. The locking mechanism 2 is provided with a locking pin 21. The three-way valve assembly 1 is provided with a locking hole 22 corresponding to the locking pin 21. When the locking pin 21 is inserted into the locking hole 22, the rotary handle 13 is restricted from rotating.

[0056] The locking mechanism 2 includes a locking pin 21, which is connected to the rotary handle 13. When the locking pin 21 is inserted into the corresponding locking hole 22 on the three-way valve assembly 1, the engagement of the locking pin 21 with the locking hole 22 restricts the rotation of the rotary handle 13, preventing the valve core 11 from shifting due to external vibration or human operation. This function ensures that the valve will not undergo unexpected changes in a specific position. It solves the problem of valve core 11 shifting due to external factors in traditional three-way ball valves, while also meeting the requirements for rapid venting and fluid switching in air source processing.

[0057] like Figures 3 to 8 As shown, in this embodiment, the rotating handle 13 is provided with a rotating seat 131 at one end near the valve core 11, and a sliding groove 1311 is provided at the other end away from the valve core 11. The locking mechanism 2 is disposed in the sliding groove 1311 and slides along the sliding groove 1311.

[0058] When the locking mechanism 2 slides along the slide groove 1311, the locking pin 21 and the locking hole 22 engage or disengage with each other, locking or unlocking the rotating handle 13.

[0059] The locking mechanism 2 is installed within the slide groove 1311 and can slide along it. When the locking mechanism 2 slides to a specific position, the locking pin 21 inserts into the locking hole 22 on the three-way valve assembly 1, achieving locking; when it slides to another position, the locking pin 21 disengages from the locking hole 22, achieving unlocking. The user can lock or unlock the mechanism 2 by pushing or pulling it within the slide groove 1311, ensuring that the locking mechanism 2 automatically positions itself when it slides to a predetermined position, preventing accidental sliding within the slide groove 1311. The straightness of the slide groove 1311 design makes locking operations more convenient, and a limiting device at the end of the slide groove 1311 can prevent the locking mechanism 2 from sliding out of its designated range.

[0060] The design of the slide groove 1311 and the sliding locking mechanism 2 makes the locking and unlocking operation very intuitive. The operation can be completed simply by pushing or pulling the locking mechanism 2, which is labor-saving and fast.

[0061] The locking mechanism 2 includes:

[0062] Locking block 23 is disposed in slide groove 1311. Locking block 23 is provided with locking groove 231 at one end near locking hole 22. Locking pin 21 is at least partially located in locking groove 231 and cooperates with locking groove 231.

[0063] The locking groove 231 is parallel to the sliding groove 1311. The locking groove 231 includes a first stepped surface 2311 and a second stepped surface 2312. The distance between the first stepped surface 2311 and the locking hole 22 is greater than the distance between the second stepped surface 2312.

[0064] The elastic mechanism 232 is disposed on the rotating seat 131 and sleeved on the locking pin 21, restricting the locking pin 21 from moving towards the locking hole 22;

[0065] When the locking block 23 slides to the first step surface 2311 and engages with the locking pin 21, the elastic mechanism 232 pops out the locking pin 21, unlocking the rotating handle 13; when the locking block 23 slides to the second step surface 2312 and engages with the locking pin 21, the elastic mechanism 232 is compressed, and the locking pin 21 is inserted into the locking hole 22, locking the rotating handle 13.

[0066] A locking groove 231 is provided at one end of the locking block 23 (near the locking hole 22), and the locking pin 21 is at least partially embedded in the locking groove 231. The locking groove 231 is parallel to the slide groove 1311, and its internal structure includes two stepped surfaces: a first stepped surface 2311, which is farther from the locking hole 22 and engages with the locking pin 21 to put the handle in the unlocked state; and a second stepped surface 2312, which is closer to the locking hole 22 and engages with the locking pin 21 to compress the elastic mechanism 232, causing the locking pin 21 to insert into the locking hole 22 and complete the locking. One end of the locking pin 21 is embedded in the locking groove 231, and the other end faces the locking hole 22. When the locking block 23 slides to different stepped surfaces, the locking pin 21 is ejected or compressed by the elastic mechanism 232, thereby realizing the locking or unlocking function.

[0067] The first step surface 2311 and the second step surface 2312 in the locking groove 231 provide clear locking and unlocking positions, avoiding ambiguity in the middle position and improving the accuracy and safety of locking operation. The elastic mechanism 232 ensures that the locking pin 21 automatically pops out when unlocked and automatically compresses when locked, without the need for additional operation, simplifying the usage process.

[0068] As a preferred embodiment of the above, the locking pin 21, locking hole 22, locking groove 231 and elastic mechanism 232 are respectively provided in two sets, and the two sets are symmetrically arranged.

[0069] By adding two sets of locking pins 21, locking holes 22, locking grooves 231 and elastic mechanisms 232 in a symmetrical design, not only is the stability and shock resistance of the operating handle improved, but also the safety and applicability are enhanced. Moreover, the two sets of symmetrical arrangement can lock the locking hole 22 when it slides to either end.

[0070] In this embodiment, the elastic mechanism 232 includes:

[0071] Compression spring 2321 is sleeved on locking pin 21. Rotary seat 131 is provided with receiving hole 1312. Compression spring 2321 is located in receiving hole 1312. Receiving hole 1312 is provided with through hole near locking hole 22. The diameter of through hole is smaller than the diameter of receiving hole 1312.

[0072] The baffle 2322 is located at the end of the receiving hole 1312 away from the through hole. The locking pin 21 is provided with a retaining edge 211. The retaining edge 211 and the baffle 2322 cooperate with each other to restrict the locking pin 21 from disengaging from the receiving hole 1312.

[0073] A compression spring 2321 is fitted onto the locking pin 21 and located within the receiving hole 1312 of the rotating base 131. The compression spring 2321 provides elastic force to drive the locking pin 21 towards the receiving hole 1312, ensuring that the locking pin 21 can be inserted into the locking hole 22 at the appropriate time to complete the locking function. The rotating base 131 has a receiving hole 1312 that mates with the compression spring 2321. A through hole is provided on the side of the receiving hole 1312 closest to the locking hole 22; the diameter of the through hole is smaller than the diameter of the receiving hole 1312. The design of the receiving hole 1312 ensures the positioning of the compression spring 2321 and the normal movement of the locking pin 21.

[0074] A baffle 2322 is disposed at the end of the receiving hole 1312 away from the through hole, and is used to restrict the movement of the locking pin 21 within the receiving hole 1312. The function of the baffle 2322 is to prevent the locking pin 21 from dislodging from the receiving hole 1312, thereby ensuring that the locking pin 21 can be stably kept locked within the locking hole 22. The locking pin 21 is provided with a retaining edge 211, which cooperates with the baffle 2322. The design of the retaining edge 211 effectively limits the range of movement of the locking pin 21, preventing the locking pin 21 from dislodging from the receiving hole 1312 due to vibration or external force.

[0075] By incorporating a compression spring 2321, a baffle 2322, and a retaining edge 211, the stability and accuracy of the locking function are further enhanced, and the locking pin 21 is effectively prevented from falling off or getting stuck.

[0076] like Figures 9 to 12 As shown, the three-way valve assembly 1 also includes a rotation limiting assembly 14, which includes:

[0077] A rotating shaft 141 is mounted on a rotating handle 13. A rotating limiting groove 142 is provided on the rotating shaft 141 along the rotation direction. The rotating limiting groove 142 includes an arc surface 1421 and a plane 1422.

[0078] Rotary limiting pin 143 is partially located within the rotary limiting groove 142 and is fixedly mounted on the three-way valve assembly 1.

[0079] When the rotating shaft 141 rotates, the rotating limiting shaft engages with the arc surface 1421 in the rotating limiting groove 142. When the rotating shaft 141 rotates to the point where the rotating limiting shaft engages with the plane 1422, the plane 1422 engages with the rotating limiting shaft to restrict the rotation of the rotating shaft 141.

[0080] A rotating shaft 141 is mounted on a rotating handle 13 to support and connect the rotating handle 13 to the valve core 11. A rotating limiting groove 142 is provided on the rotating shaft 141 along the rotation direction to limit the rotation range of the rotating shaft 141. The rotating limiting groove 142, along the rotation direction of the rotating shaft 141, includes an arc surface 1421 and a flat surface 1422. The arc surface 1421 and the flat surface 1422 are designed to provide precise mechanical positioning to ensure that the rotation of the rotating handle 13 does not exceed the set limiting angle. A rotating limiting pin 143 is fixedly mounted on the three-way valve assembly 1 and partially disposed within the rotating limiting groove 142. The rotating limiting pin 143 engages with the arc surface 1421 and / or the flat surface 1422 of the rotating limiting groove 142 to limit the rotation angle of the rotating shaft 141.

[0081] When the rotating shaft 141 rotates, the rotation limit pin 143 slides along the arc surface 1421 in the rotation limit groove 142. This design ensures that the rotating shaft 141 can rotate smoothly to a preset limit angle and gradually reduce the increment of the rotation angle. When the rotating shaft 141 rotates to a certain preset position, the rotation limit pin 143 engages with the plane 1422 in the rotation limit groove 142 to achieve the effect of limiting rotation. At this time, the mutual engagement of the plane 1422 and the rotation limit pin 143 will effectively limit the rotating shaft 141 from continuing to rotate, preventing the handle from being accidentally rotated excessively.

[0082] The arc surface 1421 and flat surface 1422 of the rotary limiting groove 142 provide precise positioning for the rotating shaft 141, preventing excessive rotation that could lead to over-opening or over-closing of the valve and protecting equipment safety. The rotary limiting assembly 14 provides a more stable and reliable handle operation experience by limiting the rotation angle, especially in industrial environments with high vibration, ensuring valve stability.

[0083] As a preferred embodiment of the above, the angle of the arc surface 1421 is 90 degrees. After the rotating shaft 141 rotates 90 degrees, the plane 1422 cooperates with the rotation limit shaft to restrict the rotation of the rotating shaft 141.

[0084] The arc surface 1421 in the rotary limiting groove 142 is set to an angle of 90 degrees. When the rotating shaft 141 rotates to 90 degrees, the rotary limiting pin 143 engages with the arc surface 1421. Upon further rotation, the rotary limiting pin 143 contacts the plane 1422 in the rotary limiting groove 142, thus limiting rotation. By setting the arc surface 1421 to 90 degrees, the rotation angle of the rotary handle 13 is precisely controlled. This design restricts the rotation angle of the rotary handle 13 to within a 90-degree range, ensuring that valve operation is within a predetermined safe range.

[0085] like Figures 13 to 14As shown, in this embodiment, the valve core 11 includes an air inlet 111 and an air outlet 112, and the air inlet 111 and the air outlet 112 are configured as rectangular structures with partial arcs.

[0086] The air inlet 111 and air outlet 112 of the valve core 11 adopt a rectangular structure with partial arcs. This structure optimizes the airflow and reduces the resistance of fluid flowing through the valve. Moreover, this rectangular design of the air inlet of the valve core 11 has a larger flow area compared to traditional ball valves; a ball valve design with the same cross-sectional area requires a larger overall volume, so this rectangular design saves more space and allows for a larger flow rate.

[0087] As a preferred embodiment of the above, the valve body of the three-way valve assembly 1 is configured as a cubic structure.

[0088] The valve body of the three-way valve assembly 1 adopts a cubic structure design. The regular shape of the valve body facilitates the unified layout and installation of various connection ports, ensuring the stability and structural strength of the valve body. The cubic structure design helps to optimize the size and weight of the valve, making it easier to integrate into equipment with limited space, improving installation flexibility, and its splicing appears very compact and coordinated.

[0089] The three-way switch valve in this embodiment achieves the opening and closing of the gas source in the pipeline by rotating the rotary handle 1390°, which drives the valve core 11 to rotate back and forth 90°. Its main features are: large flow rate when opening, and rapid discharge of gas pressure after valve closing; the valve core 11 can be effectively locked after the valve is in the open / closed position to prevent displacement of the valve core 11; the rotary limit device effectively saves installation space; and the unique appearance design makes it more aesthetically pleasing when assembled with the three-piece unit.

[0090] In the description of this utility model, 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified.

[0091] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," 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 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 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 utility model according to the specific circumstances.

[0092] In the description of this specification, the references to terms such as "one 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 the present invention. 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 may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0093] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A three-way switch valve with a locking function, characterized in that, include: Three-way valve assembly (1), the three-way valve assembly (1) comprising: Valve core (11), the valve core (11) is disposed inside the three-way valve assembly (1), and the valve core (11) is rotatably disposed; Three fluid valve ports (12) are respectively disposed on the three-way valve assembly (1), and the flow of the fluid valve ports (12) is switched by the rotation of the valve core (11); A rotating handle (13) is fixedly connected to the valve core (11) and is used to drive the rotation of the valve core (11); A locking mechanism (2) is provided on the rotating handle (13). A locking pin (21) is provided on the locking mechanism (2). A locking hole (22) is provided on the three-way valve assembly (1) corresponding to the locking pin (21). When the locking pin (21) is inserted into the locking hole (22), the rotating handle (13) is restricted from rotating.

2. The three-way switch valve with locking function according to claim 1, characterized in that, The rotary handle (13) has a rotary seat (131) at one end near the valve core (11), and a slide groove (1311) at the other end away from the valve core (11). The locking mechanism (2) is located in the slide groove (1311) and slides along the slide groove (1311). When the locking mechanism (2) slides along the slide groove (1311), the locking pin (21) and the locking hole (22) engage or disengage with each other to lock or unlock the rotating handle (13).

3. The three-way switch valve with locking function according to claim 2, characterized in that, The locking mechanism (2) includes: Locking block (23), the locking block (23) is disposed in the slide groove (1311), the locking block (23) is provided with a locking groove (231) at one end near the locking hole (22), the locking pin (21) is at least partially located in the locking groove (231) and cooperates with the locking groove (231); The locking groove (231) is parallel to the sliding groove (1311). The locking groove (231) includes a first stepped surface (2311) and a second stepped surface (2312). The distance between the first stepped surface (2311) and the locking hole (22) is greater than the distance between the second stepped surface (2312). An elastic mechanism (232) is disposed on the rotating seat (131) and sleeved on the locking pin (21) to restrict the locking pin (21) from moving toward the locking hole (22); When the locking block (23) slides to the first step surface (2311) and engages with the locking pin (21), the elastic mechanism (232) pops out the locking pin (21) to unlock the rotating handle (13); when the locking block (23) slides to the second step surface (2312) and engages with the locking pin (21), the elastic mechanism (232) is compressed, and the locking pin (21) is inserted into the locking hole (22) to lock the rotating handle (13).

4. The three-way switch valve with locking function according to claim 3, characterized in that, The locking pin (21), locking hole (22), locking groove (231) and elastic mechanism (232) are provided in two sets, and the two sets are arranged symmetrically.

5. The three-way switch valve with locking function according to claim 3, characterized in that, The elastic mechanism (232) includes: A compression spring (2321) is sleeved on the locking pin (21). The rotating seat (131) is provided with a receiving hole (1312). The compression spring (2321) is located in the receiving hole (1312). The receiving hole (1312) is provided with a through hole near the locking hole (22). The diameter of the through hole is smaller than the diameter of the receiving hole (1312). A baffle (2322) is provided at one end of the receiving hole (1312) away from the through hole. A retaining edge (211) is provided on the locking pin (21). The retaining edge (211) cooperates with the baffle (2322) to restrict the locking pin (21) from disengaging from the receiving hole (1312).

6. The three-way switch valve with locking function according to claim 1, characterized in that, The three-way valve assembly (1) further includes a rotation limiting assembly (14), which includes: A rotating shaft (141) is disposed on the rotating handle (13). A rotating limiting groove (142) is provided on the rotating shaft (141) along the rotation direction. The rotating limiting groove (142) includes an arc surface (1421) and a plane (1422). A rotating limiting pin (143) is partially located in the rotating limiting groove (142) and fixedly mounted on the three-way valve assembly (1). When the rotating shaft (141) rotates, the rotating limiting shaft engages with the arc surface (1421) in the rotating limiting groove (142). When the rotating shaft (141) rotates to the point where the rotating limiting shaft engages with the plane (1422), the plane (1422) engages with the rotating limiting shaft to restrict the rotation of the rotating shaft (141).

7. The three-way switch valve with locking function according to claim 6, characterized in that, The arc surface (1421) has an angle of 90 degrees. After the rotating shaft (141) rotates 90 degrees, the plane (1422) cooperates with the rotating limiting shaft to restrict the rotating shaft (141) from rotating.

8. The three-way switch valve with locking function according to claim 1, characterized in that, The valve core (11) includes an air inlet (111) and an air outlet (112), and the air inlet (111) and the air outlet (112) are configured as a rectangular structure with a partial arc.

9. The three-way switch valve with locking function according to claim 1, characterized in that, The valve body of the three-way valve assembly (1) is configured as a cubic structure.

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