Three-eccentric center butterfly valve for hydrogen fuel cell

Abstract

The utility model is applicable to the technical field of three-eccentric center butterfly valves, in particular to a three-eccentric center butterfly valve for a hydrogen fuel cell, which comprises a valve body, a cover plate and a sealing plug are respectively arranged on two sides of the outer side of the valve body, a bearing is mounted inside the valve body, a valve rod is rotatably connected inside the bearing, and a sector gear is mounted at one end of the valve rod. The fan-shaped gear, the torsional spring, the torsional spring end fixing hole and the torsional spring fixing face are arranged, the torsional spring is arranged on the fan-shaped gear in a special installation state, the torsional spring can be directly installed in the fan-shaped gear, connection between the torsional spring and the fan-shaped gear is firmer through the installation mode, and the service life of the fan-shaped gear is prolonged. And in the installation process of the torsional spring, the end, making contact with the sector gear, of the torsional spring can be directly arranged in the torsional spring end fixing hole, the torsional spring does not need to be bent, and therefore the installation efficiency of the torsional spring is greatly improved, and the production efficiency of the three-eccentric center butterfly valve is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of triple-eccentric butterfly valves, in particular to a triple-eccentric butterfly valve used for a hydrogen fuel cell. Background Art

[0002] The triple eccentric butterfly valve is an advanced valve design that uses three eccentric principles to achieve a precise seal between the valve plate and the valve seat. In the automotive fuel cell system, the back pressure valve is used to regulate and control the gas flow to ensure the stable operation of the fuel cell system. The triple eccentric design allows the butterfly valve to gradually move away from the valve seat when closed to reduce wear and achieve a nearly zero leakage sealing effect. This feature makes the triple eccentric butterfly valve very suitable for use as a back pressure valve for automotive fuel cells because it can provide precise flow control and excellent sealing performance, thereby improving fuel efficiency and system response speed.

[0003] When using a triple eccentric butterfly valve as a back pressure valve, the torsion spring is a key functional component used to drive the valve plate back to its original position when power is off or the system fails, ensuring that the valve can be safely closed.

[0004] In the prior art, the installation of torsion springs in triple eccentric butterfly valves is usually complicated because their outer diameter is large, which requires that there must be enough space inside the valve body to accommodate the torsion springs. In addition, in order to achieve a firm connection between the torsion spring and the fan gear, a special bending treatment is required in the area where the torsion spring contacts the fan gear to ensure that the outer surface of the torsion spring can fully fit the surface of the fan gear, which results in the installation of the torsion spring requiring complex and cumbersome processing methods, which not only reduces the overall installation efficiency, but also may increase the manufacturing and maintenance costs. In this regard, the utility model provides a triple eccentric butterfly valve for hydrogen fuel cells to solve the above technical problems. Utility Model Content

[0005] The purpose of the embodiment of the utility model is to provide a three-eccentric butterfly valve for a hydrogen fuel cell, aiming to solve the technical problems mentioned in the background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A three-eccentric butterfly valve for a hydrogen fuel cell, comprising a valve body, and a cover plate and a sealing plug are respectively arranged on both sides of the outer side of the valve body, a bearing is installed inside the valve body, and a valve stem is rotatably connected inside the bearing, a sector gear is installed at one end of the valve stem, and a torsion spring is installed on the surface of the sector gear, a driving assembly is commonly arranged on the outer side of the sector gear and the inner side of the valve body, and the driving assembly is used to drive the sector gear to rotate;

[0008] The outer side of the valve stem is detachably connected with a valve plate, and the outer side of the valve plate is sleeved with vulcanized rubber. A valve sleeve is arranged on one side of the inner side of the valve body, and the valve sleeve is fitted and connected with the valve plate;

[0009] The surface of the sector gear is provided with a torsion spring end fixing hole, the interior of the valve body is provided with a torsion spring fixing surface, and the two ends of the torsion spring are respectively arranged in the torsion spring end fixing hole and the torsion spring fixing surface.

[0010] Furthermore, a plurality of concave rings are provided on the outer side of the valve plate, and the vulcanized rubber is stably connected to the valve plate through the concave rings, a rubber sealing surface is provided on the surface of the vulcanized rubber, a valve sleeve sealing surface is provided inside the valve sleeve, and the size of the rubber sealing surface is larger than the size of the valve sleeve sealing surface.

[0011] Furthermore, a sealing ring and a gasket are arranged between the valve stem and the valve body, and the gasket is arranged between the bearing and the sealing ring, an O-ring is arranged between the valve sleeve and the valve body, a hole retaining ring is arranged inside the valve body, and the hole retaining ring is arranged between the torsion spring and the bearing.

[0012] Furthermore, a magnet is installed on the surface of the sector gear, a control board is installed inside the cover plate, and the control board is electrically connected to the magnet.

[0013] Furthermore, the driving assembly includes:

[0014] A driving motor is installed inside the valve body, and a driving gear is installed at the output end of the driving motor;

[0015] The valve body is internally rotatably connected with a gear shaft, and the outer side of the gear shaft is sleeved with a transmission gear, and the outer side of the transmission gear is meshedly connected with the outer sides of the driving gear and the fan gear;

[0016] A pin is installed on the outer side of the valve body.

[0017] Furthermore, a limiting groove is provided on the surface of the sector gear, and a first sector gear limiting step and a second sector gear limiting step are provided inside the valve body. Through the cooperation of the limiting groove, the first sector gear limiting step and the second sector gear limiting step, the opening of the valve plate can be limited to 0%-90%.

[0018] Furthermore, the surfaces of the valve stem and the valve plate are respectively provided with fixed threaded holes and fixed threaded grooves with the same aperture, and the interiors of the fixed threaded holes and the fixed threaded grooves are jointly meshed and connected with screws, and the valve plate is detachably connected to the valve plate through the cooperation of the screws, the fixed threaded holes and the fixed threaded grooves.

[0019] Furthermore, a positioning installation hole is provided on the surface of the valve sleeve.

[0020] The utility model provides a three-eccentric butterfly valve for a hydrogen fuel cell, which has the following beneficial effects:

[0021] By providing a sector gear, a torsion spring, a torsion spring end fixing hole and a torsion spring fixing surface, and arranging the torsion spring on the sector gear in a special installation state, the torsion spring can be directly installed inside the sector gear, and this installation method makes the connection between the torsion spring and the sector gear more secure. During the installation process, the end of the torsion spring that contacts the sector gear can be directly placed inside the torsion spring end fixing hole, and there is no need to bend the torsion spring, thereby greatly improving the installation efficiency of the torsion spring and further improving the production efficiency of the three-eccentric butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The figure is a schematic diagram of the structure of a triple eccentric butterfly valve for a hydrogen fuel cell.

[0023] Figure 2 This is a schematic diagram of the front structure of a three-eccentric butterfly valve used in a hydrogen fuel cell.

[0024] Figure 3 A side cross-sectional view of a triple-eccentric butterfly valve for a hydrogen fuel cell.

[0025] Figure 4 The figure is a schematic diagram of the back structure of a triple-eccentric butterfly valve used in a hydrogen fuel cell.

[0026] Figure 5 The present invention is a top cross-sectional view of a valve body and pins in a triple-eccentric butterfly valve for a hydrogen fuel cell.

[0027] Figure 6 The present invention is a schematic diagram of the top structure of a valve body, a drive motor, a transmission gear, a sector gear and a driving gear in a triple eccentric butterfly valve for a hydrogen fuel cell.

[0028] Figure 7 The present invention is a schematic diagram of the front three-dimensional structure of a valve stem, a sector gear and a torsion spring in a triple-eccentric butterfly valve used in a hydrogen fuel cell.

[0029] Figure 8 The present invention is a schematic diagram of the back three-dimensional structure of a valve stem, a sector gear and a torsion spring in a triple eccentric butterfly valve used in a hydrogen fuel cell.

[0030] Fig. 9 The figure is a schematic diagram of the internal structure of a valve body in a triple-eccentric butterfly valve used in a hydrogen fuel cell.

[0031] Fig.10 The present invention is a front cross-sectional view of a valve plate and vulcanized rubber in a triple-eccentric butterfly valve for a hydrogen fuel cell.

[0032] Fig.11The present invention is a side cross-sectional view of a valve sleeve in a triple-eccentric butterfly valve for a hydrogen fuel cell.

[0033] In the figure: 1. cover plate; 2. valve body; 3. valve sleeve; 4. control board; 5. magnet; 6. sector gear; 7. valve stem; 8. gasket; 9. torsion spring; 10. retaining ring for hole; 11. bearing; 12. sealing ring; 13. O-ring; 14. valve plate; 15. vulcanized rubber; 16. sealing plug; 17. screw; 18. pin; 19. drive motor; 20. driving gear; 21. gear shaft; 22. transmission gear; 23. limiting groove; 24. fixing hole of torsion spring end; 25. first sector gear limiting step; 26. torsion spring fixing surface; 27. second sector gear limiting step; 28. concave ring; 29. ​​rubber sealing surface; 30. valve sleeve sealing surface; 31. positioning mounting hole. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0035] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0036] like Figure 1-Figure 11 As shown, a triple eccentric butterfly valve for a hydrogen fuel cell provided by an embodiment of the utility model comprises a valve body 2, and a cover plate 1 and a sealing plug 16 are respectively arranged on both sides of the outer side of the valve body 2, a bearing 11 is installed inside the valve body 2, and a valve stem 7 is rotatably connected inside the bearing 11, a sector gear 6 is installed at one end of the valve stem 7, and a torsion spring 9 is installed on the surface of the sector gear 6, a driving assembly is commonly arranged on the outer side of the sector gear 6 and the inner side of the valve body 2, and the driving assembly is used to drive the sector gear 6 to rotate;

[0037] The drive components include:

[0038] A driving motor 19 is installed inside the valve body 2, and a driving gear 20 is installed at the output end of the driving motor 19;

[0039] The valve body 2 is internally rotatably connected with a gear shaft 21, which can be rotatably connected in the valve body 2 through a rolling bearing, and the outer side of the gear shaft 21 is sleeved with a transmission gear 22, and the outer side of the transmission gear 22 is meshed and connected with the outer sides of the driving gear 20 and the sector gear 6;

[0040] A pin 18 is installed on the outer side of the valve body 2;

[0041] The outer side of the valve stem 7 is detachably connected to a valve plate 14 , and the outer side of the valve plate 14 is sleeved with a vulcanized rubber 15 . A valve sleeve 3 is provided on one side inside the valve body 2 , and the valve sleeve 3 is fittedly connected to the valve plate 14 .

[0042] A sealing ring 12 and a gasket 8 are arranged between the valve stem 7 and the valve body 2, and the gasket 8 is arranged between the bearing 11 and the sealing ring 12. A hole retaining ring 10 is arranged inside the valve body 2, and the hole retaining ring 10 is arranged between the torsion spring 9 and the bearing 11. The sealing of the gap between the valve body 2 and the cover plate 1 by the sealing ring 12, the gasket 8 and the hole retaining ring 10 can effectively prevent gas from entering the upper half of the valve body 2 through the gap between the valve body 2 and the cover plate 1. An O-ring 13 is arranged between the valve sleeve 3 and the valve body 2. The sealing of the gap between the valve sleeve 3 and the valve body 2 by the O-ring 13 can effectively prevent gas from leaking through the gap between the valve sleeve 3 and the valve body 2.

[0043] In one embodiment of the utility model, when the valve plate 14 needs to be opened inside the cover plate 1, an external controller can be used to transmit a signal to the pin 18, and the pin 18 controls the driving motor 19 to work, and the output shaft of the driving motor 19 drives the driving motor 19 to rotate, and the rotating driving gear 20 drives the transmission gear 22 meshing with it to rotate through the gear shaft 21, and the rotating transmission gear 22 drives the sector gear 6 meshing with it to rotate, and then the sector gear 6 drives the valve stem 7 to rotate through the bearing 11, and the valve stem 7 drives the valve plate 14 to rotate in the air inlet and outlet of the valve body 2, so as to realize the opening operation of the three-eccentric butterfly valve. It should be noted that when the valve stem 7 is opened and rotated, the torsion spring 9 connected to the outside of the sector gear 6 will move together with the rotating sector gear 6, so that the sector gear 6 itself generates a certain strength of elastic torsion;

[0044] When the three-eccentric butterfly valve needs to be in a closed state, it is only necessary to cut off the power supply of the driving motor 19. At this time, one end of the torsion spring 9 will drive the sector gear 6 to reverse under the action of its own elastic torque until the valve plate 14 returns to the initial position and the three-eccentric butterfly valve is in a closed state.

[0045] It can be understood that when the valve plate 14 is in a closed state inside the valve body 2, the outer surface of the valve plate 14 is tightly attached to the inner wall of the valve sleeve 3, thereby ensuring a good sealing effect between the valve plate 14 and the valve sleeve 3, thereby improving the sealing performance of the three-eccentric butterfly valve.

[0046] During the process of manufacturing and producing the above-mentioned three-eccentric butterfly valve, the technicians in this field found that the torsion spring 9, a functional component used to restore the sector gear 6, the valve stem 7 and the valve plate 14 to their original positions after the three-eccentric butterfly valve is powered off, is relatively complicated to install. The reason is that the installation outer diameter of the torsion spring 9 in the prior art is large, and in order to make the torsion spring 9 firmly connected to the sector gear 6, the area where the torsion spring 9 contacts the sector gear 6 needs to be bent so that the outer surface of the torsion spring 9 can fully fit the surface of the sector gear 6.

[0047] In view of the above technical solution, the present application makes the following improvements to the three-eccentric butterfly valve based on the above technical features: a torsion spring end fixing hole 24 is provided on the surface of the sector gear 6, a torsion spring fixing surface 26 is provided inside the valve body 2, and the two ends of the torsion spring 9 are respectively arranged in the torsion spring end fixing hole 24 and the torsion spring fixing surface 26, and the installation state of the torsion spring 9 is set as follows: Figure 8 As shown;

[0048] Through the above technical scheme, the torsion spring 9 can be directly installed inside the sector gear 6, and this installation method makes the connection between the torsion spring 9 and the sector gear 6 more secure, and during the installation process, the end of the torsion spring 9 that contacts the sector gear 6 can be directly placed inside the fixing hole 24 at the end of the torsion spring, without the need to bend the torsion spring 9, thereby greatly improving the installation efficiency of the torsion spring 9 and further improving the production efficiency of the three-eccentric butterfly valve.

[0049] Preferably, a magnet 5 is installed on the surface of the sector gear 6, a control board 4 is installed inside the cover plate 1, and the control board 4 is electrically connected to the magnet 5. By arranging the magnet 5 on the sector gear 6, when the sector gear 6 drives the magnet 5 to rotate, the control board 4 corresponding to the magnet 5 can detect the opening of the sector gear 6, the valve stem 7 and the valve plate 14 in real time.

[0050] Preferably, a positioning installation hole 31 is opened on the surface of the valve sleeve 3, and the positioning installation hole 31 is used for positioning during installation, so that the installation accuracy of the triple eccentric butterfly valve is higher.

[0051] Preferably, the surfaces of the valve stem 7 and the valve plate 14 are respectively provided with a fixed threaded hole and a fixed threaded groove with the same aperture, and the interiors of the fixed threaded hole and the fixed threaded groove are jointly meshed and connected with a screw 17. The valve plate 14 is detachably connected to the valve plate 14 through the cooperation of the screw 17, the fixed threaded hole and the fixed threaded groove, so that the valve plate 14 can be conveniently and firmly detachably assembled on the valve stem 7, thereby improving the convenience of assembly and facilitating the subsequent removal of the valve plate 14 from the valve stem 7 for replacement and maintenance.

[0052] like Figure 3 , Fig.10 and Fig.11As shown, in one embodiment of the utility model, a plurality of concave rings 28 are provided on the outer side of the valve plate 14, and the vulcanized rubber 15 is stably connected to the valve plate 14 through the concave rings 28, a rubber sealing surface 29 is provided on the surface of the vulcanized rubber 15, a valve sleeve sealing surface 30 is provided inside the valve sleeve 3, and the size of the rubber sealing surface 29 is larger than the size of the valve sleeve sealing surface 30.

[0053] In this embodiment, through multiple tests by those skilled in the art, it is found that by opening an annular concave ring 28 on the valve plate 14, the vulcanized rubber 15 can be more firmly installed on the valve plate 14, thereby greatly reducing the risk of debonding. The rubber sealing surface 29 and the valve sleeve sealing surface 30 are fitted together to achieve the seal between the valve sleeve 3 and the valve plate 14, and the technicians in the art take into account the processing and manufacturing errors and adopt a design that makes the size of the rubber sealing surface 29 larger than the size of the valve sleeve sealing surface 30, thereby using the elasticity of the rubber to compensate for the processing errors and assembly errors.

[0054] like Figure 7 and Fig. 9 As shown, in one embodiment of the utility model, a limiting groove 23 is provided on the surface of the sector gear 6, and a first sector gear limiting step 25 and a second sector gear limiting step 27 are provided inside the valve body 2, and through the cooperation of the limiting groove 23, the first sector gear limiting step 25 and the second sector gear limiting step 27, the opening of the valve plate 14 can be limited to 0%-90%.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A triple eccentric butterfly valve for a hydrogen fuel cell, comprising a valve body (2), wherein a cover plate (1) and a sealing plug (16) are respectively arranged on both sides of the outer side of the valve body (2), characterized in that: A bearing (11) is installed inside the valve body (2), and a valve stem (7) is rotatably connected inside the bearing (11), a sector gear (6) is installed at one end of the valve stem (7), and a torsion spring (9) is installed on the surface of the sector gear (6), and a driving component is provided on the outer side of the sector gear (6) and inside the valve body (2), and the driving component is used to drive the sector gear (6) to rotate; The outer side of the valve stem (7) is detachably connected to a valve plate (14), and the outer side of the valve plate (14) is sleeved with vulcanized rubber (15); a valve sleeve (3) is provided on one side inside the valve body (2), and the valve sleeve (3) is fitted and connected to the valve plate (14); The surface of the sector gear (6) is provided with a torsion spring end fixing hole (24), the interior of the valve body (2) is provided with a torsion spring fixing surface (26), and the two ends of the torsion spring (9) are respectively arranged in the torsion spring end fixing hole (24) and the torsion spring fixing surface (26).

2. A triple eccentric butterfly valve for a hydrogen fuel cell according to claim 1, characterized in that: The outer side of the valve plate (14) is provided with a plurality of concave rings (28), and the vulcanized rubber (15) is stably connected to the valve plate (14) via the concave rings (28). The surface of the vulcanized rubber (15) is provided with a rubber sealing surface (29), and the interior of the valve sleeve (3) is provided with a valve sleeve sealing surface (30), and the size of the rubber sealing surface (29) is larger than the size of the valve sleeve sealing surface (30).

3. A triple eccentric butterfly valve for a hydrogen fuel cell according to claim 1, characterized in that: A sealing ring (12) and a gasket (8) are arranged between the valve stem (7) and the valve body (2), and the gasket (8) is arranged between the bearing (11) and the sealing ring (12); an O-ring (13) is arranged between the valve sleeve (3) and the valve body (2); a hole retaining ring (10) is arranged inside the valve body (2), and the hole retaining ring (10) is arranged between the torsion spring (9) and the bearing (11).

4. A triple eccentric butterfly valve for a hydrogen fuel cell according to claim 1, characterized in that: A magnetic steel (5) is installed on the surface of the sector gear (6), a control board (4) is installed inside the cover plate (1), and the control board (4) is electrically connected to the magnetic steel (5).

5. The triple eccentric butterfly valve for a hydrogen fuel cell according to claim 1, characterized in that: The drive assembly comprises: A driving motor (19) is installed inside the valve body (2), and a driving gear (20) is installed at the output end of the driving motor (19); The valve body (2) is rotatably connected to a gear shaft (21) inside, and a transmission gear (22) is sleeved on the outer side of the gear shaft (21), and the outer side of the transmission gear (22) is meshingly connected to the outer sides of the driving gear (20) and the fan gear (6); A pin (18) is installed on the outer side of the valve body (2).

6. A triple eccentric butterfly valve for a hydrogen fuel cell according to claim 1, characterized in that: A limiting groove (23) is provided on the surface of the sector gear (6), and a first sector gear limiting step (25) and a second sector gear limiting step (27) are provided inside the valve body (2). Through the cooperation of the limiting groove (23), the first sector gear limiting step (25) and the second sector gear limiting step (27), the opening of the valve plate (14) can be limited to 0%-90%.

7. A triple eccentric butterfly valve for a hydrogen fuel cell according to claim 1, characterized in that: The surfaces of the valve stem (7) and the valve plate (14) are respectively provided with a fixed threaded hole and a fixed threaded groove with the same aperture, and the interiors of the fixed threaded hole and the fixed threaded groove are jointly meshed and connected with a screw (17), and the valve plate (14) is detachably connected to the valve plate (14) through the cooperation of the screw (17), the fixed threaded hole and the fixed threaded groove.

8. The triple eccentric butterfly valve for a hydrogen fuel cell according to claim 1, characterized in that: A positioning installation hole (31) is provided on the surface of the valve sleeve (3).

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