A throttle valve having high sealing performance

Abstract

The utility model discloses a throttling valve that high sealing property, including valve body, feed pipe and connecting pipe, be equipped with the link ring on the connecting pipe, be equipped with the link groove on the feed pipe, be equipped with the locating rack through the elastic mechanism sliding and penetrating on the feed pipe, be equipped with the locating groove on the link ring, be equipped with annular sealing gasbag on the connecting pipe, be equipped with the sealing groove on the feed pipe, be equipped with the function box on the connecting pipe, be equipped with the movable chamber and the rotating chamber in the function box, the movable chamber is connected with annular sealing gasbag through the trachea, be equipped with the piston plate in the movable chamber. The utility model discloses the annular sealing gasbag is closely combined with the sealing groove after inflation, increases the sealed contact area, can effectively block the fluid leakage, compared with the traditional structure, and the sealing effect is improved obviously.

Description

Technical Field

[0001] This utility model relates to the field of throttle valve technology, and in particular to a throttle valve with high sealing performance. Background Technology

[0002] A throttle valve is a valve that controls fluid flow by changing the throttling cross-section or throttling length. A throttle valve and a check valve connected in parallel can be combined to form a check throttle valve. Throttling valves and check throttle valves are simple flow control valves. In a fixed-displacement pump hydraulic system, a throttle valve and a relief valve can be used together to form three types of throttling speed control systems: inlet throttling speed control system, return throttling speed control system, and bypass throttling speed control system. Throttling valves lack flow negative feedback and cannot compensate for speed instability caused by load changes; therefore, they are generally only used in applications where load changes are small or speed stability requirements are not high.

[0003] Existing throttle valves rely on simple sealing rings for sealing, which has several shortcomings. First, the sealing ring only relies on simple compression contact for sealing, resulting in a small sealing contact area. This makes it susceptible to seal failure due to minor pipeline vibrations, pressure changes, and other factors, leading to poor sealing performance and fluid leakage. Second, this simple compression sealing method requires extremely high installation precision. Even slight errors during installation, such as seal ring misalignment or uneven compression, can cause poor local sealing contact. Furthermore, due to the small sealing contact area, the seal ring experiences concentrated pressure under high-pressure fluids, making it prone to breakage and tearing. Therefore, a throttle valve with high sealing performance is urgently needed to solve these problems. Utility Model Content

[0004] The purpose of this invention is to provide a throttle valve with high sealing performance, so as to solve the problem mentioned in the background art that the existing throttle valves rely on a simple sealing ring to achieve sealing, which has many shortcomings.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a throttle valve with high sealing performance, comprising a valve body, a feed pipe, and a connecting pipe. The connecting pipe is provided with a connecting ring, the feed pipe is provided with a connecting groove, a positioning frame is slidably provided through the feed pipe via an elastic mechanism, the connecting ring is provided with a positioning groove, the connecting pipe is provided with an annular sealing airbag, the feed pipe is provided with a sealing groove, the connecting pipe is provided with a functional box, the functional box is provided with an active chamber and a rotating chamber, the active chamber is connected to the annular sealing airbag via an air pipe, the active chamber is provided with a piston plate, the rotating chamber is provided with a screw extending to the outside, the piston plate is connected to the piston plate via a connecting mechanism, and the screw cooperates with the feed pipe via a transmission mechanism.

[0006] Preferably, the elastic mechanism includes a spring sleeved on the outside of the positioning frame rod, with both ends of the spring connected to the outer wall of the positioning frame head and the outer wall of the feed pipe, respectively.

[0007] Preferably, the connecting mechanism includes a connecting frame threaded onto the screw, the end of which is fixedly connected to the piston plate.

[0008] Preferably, the transmission mechanism includes a gear mounted on the end of the screw, and the feed pipe is provided with a gear ring corresponding to the gear.

[0009] Preferably, the vertical section of the annular sealing airbag is T-shaped, and the vertical section of the sealing groove is also T-shaped.

[0010] Preferably, the positioning frame is T-shaped and the connecting frame is U-shaped.

[0011] The beneficial effects of this utility model are:

[0012] 1. This throttle valve uses a spring to provide elastic potential energy, so that after the connecting pipe and the feed pipe are connected, the rod of the positioning frame enters the positioning groove of the connecting ring to achieve mechanical positioning. At the same time, during the rotation of the connecting pipe, the gear and the gear ring mesh to drive the screw to rotate, causing the annular sealing airbag to inflate and form a sealed positioning. The dual positioning ensures the stability of the connection and avoids the separation of the pipeline during use.

[0013] 2. Both the annular sealing airbag and the sealing groove have a T-shaped design in their vertical sections. After inflation, the airbag fits tightly with the sealing groove, increasing the sealing contact area and effectively preventing fluid leakage. Compared with the traditional structure, the sealing effect is significantly improved.

[0014] 3. During the connection process between the connecting pipe and the feed pipe, the screw is automatically rotated through the transmission of gears and gear rings, which pushes the piston plate to fill the annular sealing airbag with gas. No additional manual operation is required, realizing the intelligent and automated sealing process, which not only improves the operating efficiency but also ensures the reliability of the sealing effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a throttle valve with high sealing performance proposed in this utility model;

[0016] Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A;

[0017] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point B;

[0018] Figure 4 for Figure 2 A magnified schematic diagram of the structure at point C.

[0019] In the diagram: 1. Valve body; 2. Feed pipe; 3. Connecting pipe; 4. Functional box; 5. Movable chamber; 6. Rotating chamber; 7. Screw; 8. Piston plate; 9. Connecting frame; 10. Air pipe; 11. Gear ring; 12. Gear; 13. Sealing groove; 14. Connecting groove; 15. Positioning frame; 16. Spring; 17. Storage groove; 18. Annular sealing airbag; 19. Connecting ring. Detailed Implementation

[0020] 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 embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Reference Figure 1-4 A high-sealing throttle valve includes a valve body 1, a feed pipe 2 and a connecting pipe 3. The connecting pipe 3 is provided with a connecting ring 19, the feed pipe 2 is provided with a connecting groove 14, and a positioning frame 15 is slidably provided through the feed pipe 2 by an elastic mechanism. The connecting ring 19 is provided with a positioning groove, the connecting pipe 3 is provided with an annular sealing airbag 18, and the feed pipe 2 is provided with a sealing groove 13. The vertical cross-section of the annular sealing airbag 18 and the sealing groove 13 are both T-shaped.

[0022] Furthermore, the connecting pipe 3 is also equipped with a storage groove 17 to store the annular sealing airbag 18 in the deflated state.

[0023] The connecting pipe 3 is equipped with a functional box 4, which contains an active chamber 5 and a rotating chamber 6. The active chamber 5 is connected to the annular sealing airbag 18 through the air pipe 10. The active chamber 5 contains a piston plate 8, and the rotating chamber 6 contains a screw 7 extending to the outside. The piston plate 8 is connected to the piston plate 8 through a connecting mechanism, and the screw 7 is connected to the feed pipe 2 through a transmission mechanism.

[0024] The elastic mechanism includes a spring 16 sleeved on the outside of the rod of the positioning frame 15. The two ends of the spring 16 are connected to the outer wall of the head of the positioning frame 15 and the outer wall of the feed pipe 2, respectively. The vertical section of the annular sealing airbag 18 is T-shaped. The elastic potential energy provided by the spring 16 enables the positioning frame 15 to be dragged, allowing its rod to enter the connecting groove 14. When the connecting ring 19 is in the connecting groove 14 and the positioning groove of the upper cover of the connecting ring 19 corresponds to the positioning frame 15, the rod of the positioning frame 15 is still in the positioning groove. At this time, the feed pipe 2 cannot be disengaged from the connecting pipe 3.

[0025] The connecting mechanism includes a connecting frame 9 threaded onto the screw 7, with its end fixedly connected to the piston plate 8. The connecting frame 9 has a U-shaped design, and its horizontal portion, as shown in the figure, slides through the inner wall of the rotating chamber 6 and extends into the movable chamber 5. Therefore, the connecting frame 9 has its own limit and will not rotate with the screw 7.

[0026] The transmission mechanism includes a gear 12 mounted on the end of the screw 7, and a gear ring 11 corresponding to the gear 12 is provided on the feed pipe 2. When the feed pipe 2 is connected to the connecting pipe 3, the gear 12 meshes with the gear ring 11.

[0027] It should be noted that the screw 7 has threads only on the outer wall of the part inside the rotating chamber 6.

[0028] Components not specifically described in this utility model are all standard parts and can be purchased from the market. The specific connection methods for each component all employ mature methods from the prior art, and will not be detailed here. Content not described in detail in this specification belongs to prior art known to those skilled in the art.

[0029] Working principle: To connect the connecting pipe 3 and the feed pipe 2, first drag the positioning frame 15, then let the connecting ring 19 enter the connecting groove 14. At this time, the gear 12 meshes with the gear ring 11. Then release the positioning frame 15 and rotate the connecting pipe 3 relative to the feed pipe 2. As the connecting pipe 3 rotates, the rod of the positioning frame 15 finally aligns with the positioning groove on the connecting ring 19 and the rod enters it. At this time, the connection between the feed pipe 2 and the connecting pipe 3 is completed. During the above rotation process, the gear 12 drives the screw 7 to rotate under the action of the gear ring 11. When the screw 7 rotates, the connecting frame 9 moves away from the screw 7, which can send the gas in the active chamber 5 into the annular sealing airbag 18 through the air pipe 10, so that it is fully inflated and fills the sealing groove 13.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A throttle valve with high sealing performance, comprising a valve body (1), an inlet pipe (2), and a connecting pipe (3), characterized in that, The connecting pipe (3) is provided with a connecting ring (19), the feeding pipe (2) is provided with a connecting groove (14), the feeding pipe (2) is provided with a positioning frame (15) through an elastic mechanism, the connecting ring (19) is provided with a positioning groove, the connecting pipe (3) is provided with an annular sealing airbag (18), the feeding pipe (2) is provided with a sealing groove (13), the connecting pipe (3) is provided with a functional box (4), the functional box (4) is provided with an active chamber (5) and a rotating chamber (6), the active chamber (5) is connected to the annular sealing airbag (18) through an air pipe (10), the active chamber (5) is provided with a piston plate (8), the rotating chamber (6) is provided with a screw (7) extending to the outside, the piston plate (8) is connected to the piston plate (8) through a connecting mechanism, and the screw (7) is engaged with the feeding pipe (2) through a transmission mechanism.

2. A throttle valve with high sealing performance according to claim 1, characterized in that, The elastic mechanism includes a spring (16) sleeved on the outside of the rod of the positioning frame (15), and the two ends of the spring (16) are respectively connected to the outer wall of the head of the positioning frame (15) and the outer wall of the feed pipe (2).

3. A throttle valve with high sealing performance according to claim 2, characterized in that, The connecting mechanism includes a connecting frame (9) threadedly mounted on the screw (7), and the end of the connecting frame (9) is fixedly connected to the piston plate (8).

4. A throttle valve with high sealing performance according to claim 3, characterized in that, The transmission mechanism includes a gear (12) installed at the end of the screw (7), and the feed pipe (2) is provided with a gear ring (11) corresponding to the gear (12).

5. A throttle valve with high sealing performance according to claim 4, characterized in that, The vertical section of the annular sealing airbag (18) is T-shaped, and the vertical section of the sealing groove (13) is also T-shaped.

6. A throttle valve with high sealing performance according to claim 5, characterized in that, The positioning frame (15) is T-shaped, and the connecting frame (9) is U-shaped.

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