Dual seal air valve

Abstract

The utility model discloses a kind of double-seal air valves, relate to air valve technical field, including valve body and connecting screw pipe, the connecting screw pipe is fixedly arranged at the lower end of valve body, the upper end of valve body is fixedly provided with connecting flange, the connecting place of connecting screw pipe and valve body is sleeved with first sealing ring, the side of connecting flange away from valve body is provided with second sealing ring, the outer wall of valve body is rotatably sleeved with first bevel gear, the lower surface both sides of first bevel gear are fixedly provided with heating rod, the inside of the upper end of valve body is rotatably provided with transmission rod, the middle end of transmission rod is fixedly sleeved with impeller, the both ends of transmission rod are provided with transmission mechanism, which drive first bevel gear reciprocating rotation.The utility model can heat drying to air valve during use, effectively prevent in low temperature environment, valve core is attached condensate, condensate icing causes valve core cannot normally move.

Description

Technical Field

[0001] This utility model relates to the field of air valve technology, specifically to a double-sealed air valve. Background Technology

[0002] In low-temperature environments, condensation can easily form between the valve core and seat of an air valve due to temperature differences during operation. When the temperature drops below freezing, this condensation freezes and adheres to the valve core surface, causing it to jam and fail to open or close properly, thus affecting the sealing performance and lifespan of the air valve. Although traditional air valves employ a double-seal structure to improve sealing, they lack specific anti-icing designs. In cold regions or low-temperature operating conditions, there is still a risk of the valve core freezing, requiring frequent manual maintenance, increasing operating costs and safety hazards. Utility Model Content

[0003] In view of the problems existing in the above-mentioned double-sealed air valves, this utility model is proposed.

[0004] Therefore, the purpose of this utility model is to provide a double-sealed air valve, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A double-sealed air valve includes a valve body and a connecting screw tube. The connecting screw tube is fixedly disposed at the lower end of the valve body, and a connecting flange is fixedly disposed at the upper end of the valve body. A first sealing ring is sleeved at the connection between the connecting screw tube and the valve body, and a second sealing ring is disposed on the side of the connecting flange away from the valve body. A first bevel gear is rotatably sleeved on the outer wall of the valve body, and heating rods are fixedly disposed on both sides of the lower surface of the first bevel gear. A transmission rod is rotatably disposed inside the upper end of the valve body, and an impeller is fixedly sleeved at the middle end of the transmission rod. Transmission mechanisms that drive the first bevel gear to reciprocate are disposed at both ends of the transmission rod.

[0007] Preferably, the transmission mechanism includes a second bevel gear and a third bevel gear, which are symmetrically arranged on both sides of the impeller. A crossbar is fixedly sleeved inside each of the second and third bevel gears. One end of the crossbar is rotatably sleeved with the inner wall of the valve body. A fourth bevel gear is fixedly sleeved at one end of the transmission rod. The second and third bevel gears are respectively meshed with both sides of the fourth bevel gear. One end of each of the two crossbars extends to the outer side of the valve body. A first incomplete bevel gear and a second incomplete bevel gear are respectively fixedly sleeved at the outer end of each of the two crossbars. The first incomplete bevel gear and the second incomplete bevel gear are in opposite directions, and the first incomplete bevel gear meshes with the first bevel gear.

[0008] Preferably, the middle ends of both crossbars are rotatably connected to the inner wall of the corresponding valve body via sealed bearings.

[0009] Preferably, the ratio of the number of teeth of the first incomplete bevel gear and the second incomplete bevel gear to the number of teeth of the first bevel gear is 1:2.

[0010] Preferably, both the first sealing ring and the second sealing ring are wear-resistant rubber rings.

[0011] Preferably, the connecting solenoid and the valve body are integrally formed.

[0012] Preferably, the connection between the connecting flange and the valve body is fixed by welding.

[0013] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0014] 1. This utility model, through the double sealing structure of the first sealing ring and the second sealing ring, can improve the sealing performance of the air valve at both ends and effectively reduce the probability of leakage.

[0015] 2. In this utility model, when gas passes through the air valve, it drives the impeller to rotate, which in turn drives the transmission rod to rotate. The transmission rod drives the fourth bevel gear to rotate, and the fourth bevel gear drives the second and third bevel gears to rotate in opposite directions, which in turn drives the two crossbars to rotate in opposite directions. This causes the two incomplete bevel gears, the first and second incomplete bevel gears, to rotate in opposite directions. The first and second incomplete bevel gears mesh with the first bevel gear in sequence, causing the first bevel gear to rotate back and forth. This, in turn, causes the two heating rods to rotate back and forth, providing comprehensive heating to the valve body. This effectively prevents condensation from adhering to the valve core in low-temperature environments, which could freeze and prevent the valve core from functioning properly. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments 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.

[0017] Figure 1 This is a schematic diagram of the structure of a double-sealed air valve proposed in this utility model;

[0018] Figure 2 for Figure 1 Another structural diagram from a different perspective;

[0019] Figure 3 for Figure 1 Internal structure diagram;

[0020] Figure 4 for Figure 3 A structural diagram from another perspective.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Valve body; 2. Connecting screw; 3. Connecting flange; 4. First sealing ring; 5. Second sealing ring; 6. Crossbar; 7. First incomplete bevel gear; 8. Second incomplete bevel gear; 9. First bevel gear; 10. Heating rod; 11. Transmission rod; 12. Fourth bevel gear; 13. Impeller; 14. Second bevel gear; 15. Third bevel gear. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0024] This utility model discloses a double-sealed air valve.

[0025] Reference Figure 1-4 A double-seal air valve includes a valve body 1 and a connecting screw tube 2. The connecting screw tube 2 is fixedly installed at the lower end of the valve body 1, and a connecting flange 3 is fixedly installed at the upper end of the valve body 1. The connecting screw tube 2 and the valve body 1 are integrally formed to improve the connection strength between the connecting screw tube 2 and the valve body 1. The connecting flange 3 is welded to the valve body 1 to improve the connection strength between the connecting flange 3 and the valve body 1. A first sealing ring 4 is sleeved at the connection between the connecting screw tube 2 and the valve body 1. A second sealing ring 5 is provided on the side of the connecting flange 3 away from the valve body 1. Both the first sealing ring 4 and the second sealing ring 5 are wear-resistant rubber rings. The double-seal structure improves the sealing effect of the connection at both ends of the air valve. A first bevel gear 9 is rotatably sleeved on the outer wall of the valve body 1. Heating rods 10 are fixedly installed on both sides of the lower surface of the first bevel gear 9. A transmission rod 11 is rotatably installed inside the upper end of the valve body 1. An impeller 13 is fixedly sleeved at the middle end of the transmission rod 11. Transmission mechanisms that drive the first bevel gear 9 to reciprocate are provided at both ends of the transmission rod 11.

[0026] Reference Figure 1-4The transmission mechanism includes a second bevel gear 14 and a third bevel gear 15, which are symmetrically arranged on both sides of the impeller 13. A crossbar 6 is fixedly sleeved inside each of the second and third bevel gears 14 and 15. One end of the crossbar 6 is rotatably sleeved with the inner wall of the valve body 1. A fourth bevel gear 12 is fixedly sleeved at one end of the transmission rod 11. The second and third bevel gears 14 and 15 are respectively meshed with both sides of the fourth bevel gear 12. One end of each crossbar 6 extends to the outside of the valve body 1, and the middle ends of each crossbar 6 are connected to a sealed bearing. The inner wall of the corresponding valve body 1 is rotatably connected to ensure the sealing effect between the crossbar 6 and the valve body 1. The outer ends of the two crossbars 6 are respectively fixedly sleeved with the first incomplete bevel gear 7 and the second incomplete bevel gear 8. The first incomplete bevel gear 7 and the second incomplete bevel gear 8 are in opposite directions. The first incomplete bevel gear 7 is meshed with the first bevel gear 9. The gear ratio of the first incomplete bevel gear 7 and the second incomplete bevel gear 8 to the first bevel gear 9 is 1:2, so that the first incomplete bevel gear 7 and the second incomplete bevel gear 8 can drive the first bevel gear 9 to rotate half a turn.

[0027] In this utility model, during use, the valve body 1 is connected to the external pipeline through the connecting screw tube 2 and the connecting flange 3. The first sealing ring 4 and the second sealing ring 5 respectively seal the connection between the connecting screw tube 2 and the valve body 1 and the mating surface between the connecting flange 3 and the external pipeline, forming a double sealing structure, which effectively improves the overall sealing performance of the air valve and reduces gas leakage.

[0028] When the air valve is in operation, gas flows through the valve body 1, and the airflow drives the impeller 13 to rotate. The impeller 13 drives the transmission rod 11 to rotate synchronously, and the fourth bevel gear 12 at one end of the transmission rod 11 rotates accordingly. Since the second bevel gear 14 and the third bevel gear 15 mesh with the two sides of the fourth bevel gear 12 respectively, the fourth bevel gear 12 drives the second bevel gear 14 and the third bevel gear 15 to rotate in opposite directions, thereby causing the two crossbars 6 to rotate in opposite directions.

[0029] The first incomplete bevel gear 7 and the second incomplete bevel gear 8 at one end of the outer side of the crossbar 6 rotate with the crossbar 6, and because they are in opposite directions, they will alternately mesh with the first bevel gear 9: when the first incomplete bevel gear 7 meshes with the first bevel gear 9, it will drive the first bevel gear 9 to rotate in one direction.

[0030] When the first incomplete bevel gear 7 disengages, the second incomplete bevel gear 8 immediately engages with the first bevel gear 9, causing the first bevel gear 9 to rotate in the opposite direction. Through this alternating meshing transmission, the first bevel gear 9 achieves reciprocating rotation, and the heating rods 10 on both sides of its lower surface swing back and forth together, so as to fully and evenly heat the outer wall of the valve body 1 and the internal valve core area.

[0031] During the heating process, heat is transferred to the gap between the valve core and the valve seat, keeping the temperature in that area above the freezing point. This effectively prevents the formation of condensate and freezing in low-temperature environments, avoids the valve core from getting stuck due to freezing, and ensures the normal opening and closing of the air valve.

[0032] The sealing bearing ensures the sealing performance between the crossbar 6 and the valve body 1, preventing gas leakage from the rotating connection; the tooth ratio of the first incomplete bevel gear 7, the second incomplete bevel gear 8 and the first bevel gear 9 is 1:2, ensuring that the angle of each reciprocating rotation of the first bevel gear 9 is appropriate, so that the swing range of the heating rod 10 covers the key area of ​​the valve body and improves the heating efficiency.

[0033] This device utilizes the kinetic energy of gas flow to drive the reciprocating motion of the heating component, achieving targeted heating. It solves the problem of valve core icing in low-temperature environments without consuming excessive additional energy. At the same time, the double sealing structure ensures the sealing reliability of the air valve, making it suitable for various low-temperature gas delivery systems.

[0034] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A double-sealed air valve, comprising a valve body (1) and a connecting screw (2), characterized in that, The connecting screw tube (2) is fixedly installed at the lower end of the valve body (1). The upper end of the valve body (1) is fixedly installed with a connecting flange (3). A first sealing ring (4) is sleeved at the connection between the connecting screw tube (2) and the valve body (1). A second sealing ring (5) is provided on the side of the connecting flange (3) away from the valve body (1). A first bevel gear (9) is rotatably sleeved on the outer wall of the valve body (1). Heating rods (10) are fixedly installed on both sides of the lower surface of the first bevel gear (9). A transmission rod (11) is rotatably installed inside the upper end of the valve body (1). An impeller (13) is fixedly sleeved at the middle end of the transmission rod (11). A transmission mechanism that drives the first bevel gear (9) to reciprocate is provided at both ends of the transmission rod (11).

2. The double-sealed air valve according to claim 1, characterized in that, The transmission mechanism includes a second bevel gear (14) and a third bevel gear (15). The second bevel gear (14) and the third bevel gear (15) are symmetrically arranged on both sides of the impeller (13). A crossbar (6) is fixedly sleeved inside the second bevel gear (14) and the third bevel gear (15). One end of the crossbar (6) is rotatably sleeved with the inner wall of the valve body (1). A fourth bevel gear (12) is fixedly sleeved at one end of the transmission rod (11). The second bevel gear (14) and the third bevel gear (15) are respectively meshed with both sides of the fourth bevel gear (12). One end of each of the two crossbars (6) extends to the outside of the valve body (1). A first incomplete bevel gear (7) and a second incomplete bevel gear (8) are fixedly sleeved at the outside of each of the two crossbars (6). The first incomplete bevel gear (7) and the second incomplete bevel gear (8) are in opposite directions. The first incomplete bevel gear (7) is meshed with the first bevel gear (9).

3. The double-sealed air valve according to claim 2, characterized in that, The middle ends of the two crossbars (6) are rotatably connected to the inner wall of the corresponding valve body (1) through sealed bearings.

4. The double-sealed air valve according to claim 2, characterized in that, The tooth ratio of the first incomplete bevel gear (7) and the second incomplete bevel gear (8) to the first bevel gear (9) is 1:

2.

5. The double-sealed air valve according to claim 1, characterized in that, Both the first sealing ring (4) and the second sealing ring (5) are wear-resistant rubber rings.

6. The double-sealed air valve according to claim 1, characterized in that, The connecting screw (2) and the valve body (1) are integrally formed.

7. The double-sealed air valve according to claim 1, characterized in that, The connection between the connecting flange (3) and the valve body (1) is fixed by welding.

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