Three-way needle valve

Abstract

The utility model belongs to the technical field of valves, particularly relates to a three-way needle valve, and aims to solve the problems that an existing brake structure is located on the outer side and is prone to damage, the service life of a device is shortened, and the brake structure is tedious in operation and inconvenient to use. The three-way needle valve comprises a three-way needle valve body and a main valve rod in threaded connection with the interior of the three-way needle valve body, a valve element is fixed to the bottom end of the main valve rod, and the three-way needle valve further comprises an auxiliary valve rod fixed to the top end of the main valve rod; a brake cylinder is fixed to the top end of the three-way needle valve body and arranged on the surface of the auxiliary valve rod in a sleeving mode, and a set of brake assembly is arranged between the auxiliary valve rod and the brake cylinder and used for limiting the position of the auxiliary valve rod. Through the ingenious design of the brake assembly and the extrusion assembly, accurate limiting and convenient unlocking of the position of the auxiliary valve rod are achieved, and a user can achieve opening and closing of the valve only through simple operation.

Description

Technical Field

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

[0002] A three-way needle valve is a special valve with three channels, enabling fluid control with one inlet and two outlets, offering great flexibility.

[0003] In the prior art, the valve stem of a three-way needle valve is threaded into the valve body. By rotating the valve stem, the valve core is adjusted up and down, thereby adjusting the operating state of the three-way needle valve. According to the search, Chinese patent publication number CN 213929650 U3 discloses a three-way needle valve. In order to prevent accidental activation, the patent has a braking structure on the surface of the valve body. However, the braking structure is located on the outside, which is prone to damage, reducing the service life of the device. Moreover, the operation of the braking structure is relatively cumbersome and inconvenient to use. Utility Model Content

[0004] The purpose of this utility model is to solve the shortcomings of the existing technology, which is that the braking structure is located on the outside, which is prone to damage and reduces the service life of the device, and the operation of the braking structure is relatively cumbersome and inconvenient to use. Therefore, a three-way needle valve is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A three-way needle valve includes a three-way needle valve body and a main valve stem threadedly connected to the three-way needle valve body. A valve core is fixed to the bottom end of the main valve stem. The valve also includes:

[0007] A secondary valve stem, which is fixed to the top of the main valve stem;

[0008] The three-way needle valve body has a brake cylinder fixed at its top end. The brake cylinder is sleeved on the surface of the auxiliary valve stem. A set of braking components is provided between the auxiliary valve stem and the brake cylinder. The braking components are used to limit the position of the auxiliary valve stem.

[0009] And a compression assembly used in conjunction with the braking assembly, the compression assembly being used to release the braking assembly's restriction on the secondary valve stem.

[0010] In one possible design, the braking assembly includes a second groove formed in the secondary valve stem, in which two trapezoidal extrusion plates slide, and brake plates are fixed to the far ends of the two trapezoidal extrusion plates. The brake cylinder has three annular brake grooves, and the two brake plates are respectively matched with the corresponding annular brake grooves. A receiving groove is formed between the two trapezoidal extrusion plates, and the same brake spring is fixed in the two receiving grooves.

[0011] In one possible design, the extrusion assembly includes a connecting block fixed to the top of the secondary valve stem. A first groove is formed in the connecting block, a sliding plate slides in the first groove, and a connecting plate slides in the second groove. Two extrusion blocks are fixed to the bottom end of the connecting plate, and the two extrusion blocks respectively press against the inclined surfaces of two trapezoidal extrusion plates. A connecting post is fixed to the bottom end of the sliding plate, and the connecting post moves downward through the second groove. The connecting plate is fixed to the bottom end of the connecting post.

[0012] In one possible design, a positioning spring is fixed to the bottom end of the slide plate, the side end of the positioning spring is fixed in the first groove, and the positioning spring is sleeved on the surface of the connecting post.

[0013] In one possible design, two connecting rods are fixed to the surface of the skateboard, and both connecting rods slide within a first groove.

[0014] In one possible design, the surfaces of the two connecting rods are fixed with the same swivel ring, the surface of which is provided with anti-slip texture.

[0015] In this application, the elasticity of the brake spring pushes the two trapezoidal extrusion plates to move in opposite directions. The two trapezoidal extrusion plates respectively drive the two brake plates into the corresponding annular brake grooves. Since the brake plates and the annular brake grooves are matched, the secondary valve stem cannot move up and down, so the secondary valve stem cannot rotate. When it is necessary to rotate the secondary valve stem, the rotating ring, connecting rod and slide plate are moved downward by holding the rotating ring. The slide plate drives the connecting column downward, and the connecting column drives the connecting plate and the two extrusion blocks downward, squeezing the two trapezoidal extrusion plates to move in opposite directions. This causes the two trapezoidal extrusion plates to drive the two brake plates back into the second groove, releasing the connection with the annular brake groove. At this time, the hand holding the rotating ring can directly rotate to drive the secondary valve stem to rotate.

[0016] Beneficial effects

[0017] In this utility model, the three-way needle valve can achieve the effect of braking the secondary valve stem through the braking component, thereby preventing the secondary valve stem from being accidentally rotated.

[0018] In this utility model, the three-way needle valve, through the extrusion assembly, can achieve the effect of quickly releasing the braking effect and rotating the secondary valve stem by pressing the rotating ring;

[0019] In this invention, the ingenious design of the braking and pressing components achieves precise positioning and convenient unlocking of the secondary valve stem. Users can easily open and close the valve with simple operations, greatly improving ease of use. The braking component uses a combination of a spring and a trapezoidal pressing plate to ensure that the braking plate can be stably engaged in the annular braking groove when no external force is applied, preventing accidental movement of the secondary valve stem and improving the reliability of the valve. After holding the rotating ring, pressing down on the rotating ring releases the braking structure and allows the secondary valve stem to rotate, which is convenient and quick. Moreover, since no parts are exposed, the risk of damage is reduced, effectively increasing the service life of the device. Attached Figure Description

[0020] Figure 1 This is a front perspective view of a three-way needle valve proposed in this utility model;

[0021] Figure 2 This is a cross-sectional view of a three-way needle valve proposed in this utility model;

[0022] Figure 3 This utility model proposes a three-way needle valve Figure 2 A magnified view of a section at point A in the middle;

[0023] Figure 4 This is a partial perspective view of a three-way needle valve proposed in this utility model.

[0024] In the diagram: 1. Three-way needle valve body; 2. Main valve stem; 3. Valve core; 4. Secondary valve stem; 5. Brake cylinder; 6. Connecting block; 7. Rotary ring; 8. Connecting rod; 9. First groove; 10. Connecting column; 11. Positioning spring; 12. Second groove; 13. Connecting plate; 14. Extrusion block; 15. Slide plate; 16. Trapezoidal extrusion plate; 17. Brake plate; 18. Receiving groove; 19. Annular brake groove; 20. Brake spring. Detailed Implementation

[0025] 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.

[0026] Example 1

[0027] Reference Figures 1-4 A three-way needle valve, used in the field of valve technology, includes:

[0028] The three-way needle valve body 1 serves as the main component, with a main valve stem 2 internally connected by threads. A valve core 3 is fixed to the bottom end of the main valve stem 2 to control the flow of fluid. At the top end of the main valve stem 2, a secondary valve stem 4 is fixed, which passes through and extends out of the brake cylinder 5 at the top end of the three-way needle valve body 1.

[0029] A brake cylinder 5 is fitted onto the secondary valve stem 4, and a braking assembly is disposed between them. The braking assembly includes a second groove 12 opened in the secondary valve stem 4, within which two trapezoidal pressing plates 16 are slidably mounted. Brake plates 17 are fixed to the far ends of the two trapezoidal pressing plates 16, and three annular brake grooves 19 are correspondingly provided in the brake cylinder 5, two of which match the brake plates 17. The trapezoidal pressing plates 16 are kept apart by brake springs 20 within receiving grooves 18, so that when no external force is applied, the brake plates 17 can be engaged in the annular brake grooves 19, thereby limiting the movement of the secondary valve stem 4.

[0030] To release the braking assembly's limiting position, this embodiment also includes a compression assembly. The compression assembly includes a connecting block 6 fixed to the top of the secondary valve stem 4. The connecting block 6 has a first groove 9, within which a sliding plate 15 is slidably mounted. The sliding plate 15 is connected to a connecting plate 13 located in a second groove 12 via a connecting post 10. Two compression blocks 14 are fixed to the bottom of the connecting plate 13, and these two compression blocks 14 respectively contact the inclined surfaces of two trapezoidal compression plates 16. When the sliding plate 15 moves downwards, the connecting post 10 and the connecting plate 13 cause the compression blocks 14 to compress the trapezoidal compression plates 16, causing them to move away from each other. This, in turn, disengages the brake plate 17 from the annular brake groove 19, thus releasing the limiting position of the secondary valve stem 4.

[0031] Example 2

[0032] refer to Figures 1-4 An improvement on Embodiment 1: To ensure that the slide plate 15 can automatically reset, a positioning spring 11 is fixed to the bottom end of the slide plate 15. The other end of the positioning spring 11 is fixed in the first groove 9 and sleeved on the connecting post 10. When the external force is released, the elastic force of the positioning spring 11 will cause the slide plate 15 to automatically reset, thereby causing the pressing block 14 to release its pressure on the trapezoidal pressing plate 16, and the brake plate 17 to re-engage in the annular brake groove 19.

[0033] In addition, to facilitate the operation of the slide plate 15, two connecting rods 8 are fixed on the surface of the slide plate 15 in this embodiment. The top of the two connecting rods 8 is fixed with a rotating ring 7. The surface of the rotating ring 7 is provided with anti-slip texture to increase the friction during operation, so that the user can rotate the secondary valve rod 4 while releasing the brake by passing through the rotating ring 7.

[0034] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A three-way needle valve, comprising a three-way needle valve body (1) and a main valve stem (2) threadedly connected within the three-way needle valve body (1), wherein a valve core (3) is fixed to the bottom end of the main valve stem (2), characterized in that, Also includes: A secondary valve stem (4) is fixed to the top of the main valve stem (2); Among them, the top end of the three-way needle valve body (1) is fixed with a brake cylinder (5), the brake cylinder (5) is sleeved on the surface of the auxiliary valve stem (4), and a set of brake components is provided between the auxiliary valve stem (4) and the brake cylinder (5). The brake components are used to limit the position of the auxiliary valve stem (4). And a compression assembly used in conjunction with the braking assembly, the compression assembly being used to release the braking assembly from limiting the secondary valve stem (4).

2. A three-way needle valve according to claim 1, characterized in that, The braking assembly includes a second groove (12) opened in the secondary valve stem (4), two trapezoidal extrusion plates (16) slide in the second groove (12), and brake plates (17) are fixed at the far ends of the two trapezoidal extrusion plates (16). Three annular brake grooves (19) are opened in the brake cylinder (5), and the two brake plates (17) are respectively matched with the corresponding annular brake grooves (19). A receiving groove (18) is opened between the two trapezoidal extrusion plates (16), and the same brake spring (20) is fixed in the two receiving grooves (18).

3. A three-way needle valve according to claim 2, characterized in that, The extrusion assembly includes a connecting block (6) fixed to the top of the secondary valve stem (4). A first groove (9) is provided in the connecting block (6). A sliding plate (15) slides in the first groove (9). A connecting plate (13) slides in the second groove (12). Two extrusion blocks (14) are fixed at the bottom of the connecting plate (13). The two extrusion blocks (14) are in extrusion contact with the inclined surfaces of the two trapezoidal extrusion plates (16) respectively. A connecting post (10) is fixed at the bottom of the sliding plate (15). The connecting post (10) moves downward and penetrates into the second groove (12). The connecting plate (13) is fixed at the bottom of the connecting post (10).

4. A three-way needle valve according to claim 3, characterized in that, The bottom end of the slide plate (15) is fixed with a positioning spring (11), the side end of the positioning spring (11) is fixed in the first groove (9), and the positioning spring (11) is sleeved on the surface of the connecting column (10).

5. A three-way needle valve according to claim 3, characterized in that, Two connecting rods (8) are fixed to the surface of the slide plate (15), and both connecting rods (8) slide within the first groove (9).

6. A three-way needle valve according to claim 5, characterized in that, The two connecting rods (8) are fixed with the same swivel (7), and the surface of the swivel (7) is provided with anti-slip texture.

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