A multi-blade cross anti-explosion valve

Abstract

The present invention provides a multi-blade cross anti-explosion valve, comprising a frame, a valve leaf, a positioning device and a reset spring; the frame comprises a first vent and a second vent arranged oppositely; the valve leaf comprises a first valve leaf and a second valve leaf arranged alternately with a fixed end and a free end, the fixed end being hinged to the relative frame of the second vent respectively; the valve leaf has an open position and a closed position, and the reset spring and the positioning device make the valve leaf be located in a fixed open position; when the valve leaf is in the open position, the opening angle α between the valve leaf and the plane where the second vent is located is an acute angle of not more than 60°, and the valve leaf abuts on the positioning device; when the valve leaf is in the closed position, the valve leaf abuts on the frame and can cover more than 90% of the second vent. The adjacent valve leaves of the present invention adopt an X-shaped cross design, which has a simple structure, has daily ventilation function and efficient shock wave resistance function, improves space utilization, and reduces costs.

Description

Technical Field

[0001] The invention relates to the technical field of explosion-proof valves, and in particular to a multi-blade cross explosion-proof valve. Background Art

[0002] At present, the explosion-proof valves using more than one closing component (valve leaf 2 or valve core 6) are mainly divided into three categories of closing methods. The first category is that the closing components use parallel linear motion, which is common in traditional modular array explosion-proof valves, such as Figure 1 and Figure 2 The second type is that the closing parts rotate along the same axis to close, which has been adopted by the new generation of modular array anti-explosion valves, such as Figure 3 The third type is that each closing component has an independent rotation axis, and each closing component adopts the same angle of rotation to open and close. The common structure is similar to a shutter, and the valve leaf 2 can rotate around the axis to close the explosion-proof valve, such as Figure 4 As shown in the figure, the valve leaves 2 of the above three types of explosion-proof valves all move under pressure to close the air passage corresponding to the valve leaves 2.

[0003] Compared with the shutter-type explosion-proof valve, the modular array explosion-proof valve has a small opening, light weight of the explosion-proof valve leaf, and a faster reaction speed to the shock wave, so it can block the shock wave to the maximum extent. It is the safest solution among the current explosion-proof valve solutions. However, the current modular array explosion-proof valve needs to have a certain distance between the valve leaves 2 for air circulation, which makes it larger in size. In addition, due to its complex structure, it is expensive and cannot be widely used.

[0004] Invention patent content

[0005] In order to solve the above technical problems, the present invention provides a multi-blade cross-anti-explosion valve. Adjacent valve leaves adopt an X-shaped cross design with a simple structure. Each valve leaf not only has the function of closing the corresponding vent, but also blocks the direct air duct for the adjacent valve leaves, so that the airflow cannot pass directly through, providing efficient anti-shock wave function.

[0006] The present invention solves the technical problem by adopting the following technical solution:

[0007] A multi-blade cross anti-explosion valve, comprising a frame, a valve leaf, a positioning device and a return spring; wherein:

[0008] The frame includes a first vent and a second vent that are arranged opposite to each other;

[0009] The valve leaf comprises a first valve leaf and a second valve leaf arranged alternately, the first valve leaf and the second valve leaf each having a fixed end and a free end, the fixed end being hinged to the frame of the second vent, the fixed end of the first valve leaf and the fixed end of the second valve leaf being respectively arranged on the frame opposite to the second vent, so that the first valve leaf and the second valve leaf can rotate around the frame;

[0010] The positioning device extends along the direction of the frame hinged to the fixed end, and its two ends are connected to the frame away from the second vent;

[0011] The valve leaf has an open position and a closed position, and the return spring causes the valve leaf to be located in the open position;

[0012] When the valve leaf is in the open position, the valve leaf and the plane where the second vent is located have an opening angle α, and α is an acute angle not greater than 60°. The valve leaf abuts against the positioning device, so that the valve leaf is located in a fixed position under the action of a return spring and prevents the valve leaf from closing under the action of strong winds; when the valve leaf is in the closed position, the valve leaf abuts against the frame and can cover more than 90% of the second vent.

[0013] Furthermore, the first valve leaf and the second valve leaf have the same shape and size to simplify the structure of the anti-explosion valve.

[0014] Furthermore, the number of the first valve leaf and the second valve leaf is one or a plurality of valve leaves arranged along the x-direction, and a suitable number of valve leaves is set according to the x-direction dimension of the second vent and the x-direction dimension of each valve leaf; preferably, when the valve leaf is in a closed position, the valve leaf can cover all the second vents to achieve the best anti-shock wave effect.

[0015] Furthermore, the opening angle α is 30°-45°, so as to achieve a better ventilation effect and enable the valve leaf to be closed in a shorter time when a shock wave comes.

[0016] Furthermore, the return spring includes a first tension spring and a second tension spring.

[0017] Furthermore, the positioning device includes a first positioning rod arranged in the middle position of the first vent; one end of the first tension spring is connected to the first valve leaf, and the other end is connected to the first positioning rod; one end of the second tension spring is connected to the second valve leaf, and the other end is connected to the first positioning rod; when the valve leaf is in the open position, the first valve leaf and the second valve leaf both rest against the first positioning rod.

[0018] Furthermore, the positioning device includes a second positioning rod and a third positioning rod, and the second positioning rod and the third positioning rod are arranged inside the frame and symmetrically on both sides of the middle position of the first vent; one end of the first tension spring is connected to the first valve leaf, and the other end is connected to the second positioning rod; one end of the second tension spring is connected to the second valve leaf, and the other end is connected to the third positioning rod; when the valve leaf is in the open position, the first valve leaf abuts against the second positioning rod, and the second valve leaf abuts against the third positioning rod.

[0019] Furthermore, one end of the first tension spring is connected to the end of the free end of the first valve leaf, and one end of the second tension spring is connected to the end of the free end of the second valve leaf, so as to reduce the tension required by the tension spring.

[0020] Further, the return spring includes a first torsion spring and a second torsion spring;

[0021] The frame is also connected to a first spring shaft and a second spring shaft extending along the x direction, the first spring shaft is arranged between the first valve leaf and the second vent, and the first torsion spring is passed through the first spring shaft; the second spring shaft is arranged between the second valve leaf and the second vent, and the second torsion spring is passed through the second spring shaft;

[0022] One end of the first torsion spring abuts against the first valve leaf, and the other end abuts against the frame close to the fixed end of the first valve leaf; one end of the second torsion spring abuts against the second valve leaf, and the other end abuts against the frame close to the fixed end of the second valve leaf.

[0023] Furthermore, a reinforcing rib extending along the x-direction is provided at the middle position of the second vent;

[0024] And / or, a plurality of reinforcing ribs extending along the x-direction are arranged at the second vent, and the plurality of reinforcing ribs are symmetrically arranged on both sides of the middle position of the second vent;

[0025] When the valve leaf is in the closed position, the valve leaf abuts against the reinforcing rib, so that the reinforcing rib further supports the valve leaf and prevents the valve leaf from being damaged by the shock wave.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The adjacent valve leaves adopt an X-shaped cross design, which not only has the daily ventilation function, but also each valve leaf has the function of closing the corresponding vent, and at the same time blocks the direct air duct for the adjacent valve leaves, so that the airflow cannot pass directly, providing efficient anti-shock wave function.

[0028] 2. Adjacent valve leaves are close together, which greatly improves the space utilization.

[0029] 3. Simple structure, greatly reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The figure is a schematic diagram of the structure of an embodiment of an existing traditional modular array anti-explosion valve.

[0031] Figure 2 It is a schematic structural diagram of another embodiment of an existing traditional modular array anti-explosion valve.

[0032] Figure 3 It is a schematic diagram of the structure of an embodiment of an existing new generation modular array anti-explosion valve.

[0033] Figure 4 The figure is a schematic structural diagram of an embodiment of an existing shutter-type explosion-proof valve.

[0034] Figure 5 It is a schematic structural diagram of the first embodiment of the multi-blade cross anti-explosion valve of the present invention.

[0035] Figure 6 It is a schematic diagram of the yz cross-sectional structure of the first embodiment of the present invention.

[0036] Figure 7 It is a schematic diagram of the yz cross-sectional structure of the second embodiment of the multi-blade cross anti-explosion valve of the present invention.

[0037] Figure 8 It is a schematic structural diagram of the third embodiment of the multi-blade cross anti-explosion valve of the present invention.

[0038] Fig. 9 It is a schematic diagram of the yz cross-sectional structure of the third embodiment of the present invention.

[0039] In the figure: 1-frame; 11-first vent; 12-second vent; 13-reinforcement rib; 2-valve leaf; 21-first valve leaf; 22-second valve leaf; 31-first positioning rod; 32-second positioning rod; 33-third positioning rod; 41-first tension spring; 42-second tension spring; 43-first torsion spring; 44-second torsion spring; 45-first spring shaft; 46-second spring shaft; 5-hinge; 6-valve core; 7-partition. DETAILED DESCRIPTION

[0040] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0041] In the description of the present invention, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The directions "x", "y", and "z" are directions indicated by the coordinate system in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0042] In addition, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The present invention provides a multi-blade cross anti-explosion valve, referring to Figure 5-Figure 9 As shown, it includes a frame 1, a valve leaf 2, a positioning device and a reset spring. The frame 1 includes a first vent 11 and a second vent 12 arranged oppositely, and the valve leaf 2 includes a first valve leaf 21 and a second valve leaf 22 arranged alternately. A first valve leaf 21 is arranged along the x direction, and a second valve leaf 22 is arranged adjacent to the first valve leaf 21, and a first valve leaf 21 is arranged adjacent to the second valve leaf 22. In this way, the first valve leaf 21 and the second valve leaf 22 are alternately arranged in sequence, and the adjacent valve leaves 2 are close to each other, which greatly improves the space utilization. The first valve leaf 21 and the second valve leaf 22 both have a fixed end and a free end, and the fixed end is hinged to the frame of the second vent 12. The fixed end of the first valve leaf 21 and the fixed end of the second valve leaf 22 are respectively arranged on the frames opposite to the second vent 12, so that the first valve leaf 21 and the second valve leaf 22 can rotate around the frames. The fixed end is hinged to the frame of the second vent 12 through a hinge, and the hinge can be a hinge 5. The fixed end of each valve leaf 2 is hinged to the frame of the second vent 12 through a hinge 5, and the valve leaf 2 can rotate around the rotation axis of the hinge 5. The hinges on the same side can also be inserted into a rotation axis so that the valve leaves 2 on the same side rotate around the same rotation axis.

[0044] The positioning device extends along the direction of the frame hinged to the fixed end, and its two ends are connected to the frame 1 away from the second vent 12. Preferably, the positioning device can be a first positioning rod 31 arranged in the middle of the first vent 11, or a second positioning rod 32 and a third positioning rod 33 arranged inside the frame 1 and symmetrically arranged on both sides of the middle of the first vent 11. Preferably, the positioning device is a rectangular plate.

[0045] The valve leaf 2 has an open position and a closed position. The reset spring rotates the valve leaf 2 from the second vent 12 to the first vent 11 until the valve leaf 2 abuts against the positioning device, so that the valve leaf 2 is in a fixed open position under the action of the reset spring. At this time, the valve leaf 2 is still subject to the force of the reset spring, which can prevent the valve leaf 2 from closing when it is affected by strong winds. When the valve leaf 2 is in the open position, the valve leaf 2 and the plane where the second vent 12 is located have an opening angle α, and α is an acute angle not greater than 60°; the z-direction height of the positioning device can be set accordingly according to the opening angle. The adjacent first valve leaf 21 and the second valve leaf 22 are intersected in an X shape to form a non-straight air flow channel, so that the airflow cannot pass directly. Most of the airflow enters from one side of the valve leaf 2, bypasses the valve leaf 2, and flows into the other side of the valve leaf 2 from the gap between the valve leaves 2, so that the airflow can flow between the first vent 11 and the second vent 12, so that the anti-explosion valve provides ventilation function in daily use.

[0046] During installation, the first vent 11 is oriented toward the direction of the shock wave. During daily use, the valve leaf 2 is in the open position, and the explosion-proof valve provides ventilation function; when the shock wave comes, under the action of the shock wave, the valve leaf 2 quickly rotates from the first vent 11 to the direction of the second vent 12 until the valve leaf 2 abuts against the frame 1, so that the valve leaf 2 closes the second vent 12, providing efficient shock wave resistance. In order to achieve the effect of shock wave resistance, when the valve leaf 2 is in the closed position, the valve leaf 2 needs to be able to cover more than 90% of the second vent 12. When the shock wave ends, the valve leaf 2 returns to the open position under the action of the reset spring, so that the explosion-proof valve resumes ventilation function. In order to reduce the weight of the valve leaf 2 and enable the valve leaf 2 to quickly cover the second vent 12, the cross-sectional shape of the first valve leaf 21 and the second valve leaf 22 in the xz plane can be rectangular, or can be a flat shape such as an ellipse or an oblong.

[0047] Preferably, the first valve leaf 21 and the second valve leaf 22 have the same shape and size, which can simplify the structure of the explosion-proof valve, and there is no need to distinguish between the first valve leaf 21 and the second valve leaf 22 during installation, which is convenient for installation. The number of the first valve leaf 21 and the second valve leaf 22 is one or multiple arranged along the x direction. According to the size of the second vent 12, a suitable number of valve leaves 2 can be set so that the valve leaf 2 can cover all the second vents 12 in the x direction. This situation includes the situation where there is a gap between adjacent valve leaves 2 caused by the manufacturing process and assembly process of the valve leaf 2. When the first valve leaf 21 and the second valve leaf 22 are multiple arranged along the x direction, according to the x-direction size of the second vent 12 and the x-direction size of each valve leaf 2, the number of valve leaves 2 to be installed is an even number or an odd number. When the number of valve leaves 2 to be installed is an even number, the number of the first valve leaf 21 and the second valve leaf 22 is the same, for example, the first valve leaf 21 and the second valve leaf 22 are both 2, 3, 4, 5, 6, 7, 8, 9, 10... When the number of valve leaves 2 to be installed is an odd number, the number of the first valve leaf 21 and the second valve leaf 22 differ by one. For example, the first valve leaf 21 is close to the x-direction end of the frame 1, and the first valve leaf 21 is one more than the second valve leaf 22. The number of the first valve leaf 21 is 2, 3, 4, 5, 6, 7, 8, 9, 10... and the number of the second valve leaf 22 is 1, 2, 3, 4, 5, 6, 7, 8, 9... accordingly.

[0048] In order to achieve the effect of resisting shock waves, when the valve leaf 2 is in the closed position, when the y-direction length of the valve leaf 2 is more than 90% of the y-direction length of the second vent 12, the valve leaf 2 can cover more than 90% of the second vent 12. Preferably, the y-direction length of the valve leaf 2 is not less than the y-direction length of the second vent 12, so that the valve leaf 2 can also cover the entire second vent 12 in the y-direction, that is, when a shock wave comes, the valve leaf 2 can cover the entire second vent 12, achieving the best effect of resisting shock waves.

[0049] Preferably, the opening angle α is 30°-45° to achieve a better ventilation effect and enable the valve leaf 2 to be closed in a shorter time when a shock wave comes.

[0050] The return spring places the valve leaf 2 in the open position, and the return spring can be a tension spring or a torsion spring.

[0051] First embodiment

[0052] When the reset spring is a tension spring, it includes a first tension spring 41 and a second tension spring 42. When the positioning device is a first positioning rod 31 disposed in the middle of the first vent 11, as shown in FIG. Figure 5 and Figure 6As shown, one end of the first tension spring 41 is connected to the first valve leaf 21, and the other end is connected to the first positioning rod 31; one end of the second tension spring 42 is connected to the second valve leaf 22, and the other end is connected to the first positioning rod 31. Preferably, one end of the first tension spring 41 is connected to the end of the free end of the first valve leaf 21, and one end of the second tension spring 42 is connected to the end of the free end of the second valve leaf 22, so as to reduce the tension required by the tension spring. When the valve leaf 2 is in the open position, the free end of the valve leaf 2 rotates upward under the tension of the tension spring, toward the first vent 11, so that the middle parts of the first valve leaf 21 and the second valve leaf 22 are both against the first positioning rod 31. When a shock wave comes, under the action of the shock wave, the valve leaf 2 overcomes the tension of the tension spring, quickly rotates from the first vent 11 to the second vent 12, closes the second vent 12, and provides an efficient anti-shock wave function.

[0053] Second embodiment

[0054] like Figure 7 As shown, different from the first embodiment, the positioning device is a second positioning rod 32 and a third positioning rod 33 symmetrically arranged on both sides of the middle position of the first vent 11. One end of the first tension spring 41 is connected to the first valve leaf 21, and the other end is connected to the second positioning rod 32; one end of the second tension spring 42 is connected to the second valve leaf 22, and the other end is connected to the third positioning rod 33. When the valve leaf 2 is in the open position, the part of the first valve leaf 21 close to its free end abuts against the second positioning rod 32, and the part of the second valve leaf 22 close to its free end abuts against the third positioning rod 33.

[0055] Third embodiment

[0056] like Figure 8 and Fig. 9 As shown, when the reset spring is a torsion spring, it includes a first torsion spring 43 and a second torsion spring 44. The frame 1 is also connected with a first spring shaft 45 and a second spring shaft 46 extending along the x direction. The first spring shaft 45 is arranged between the first valve leaf 21 and the second vent 12, and the first torsion spring 43 is passed through the first spring shaft 45; the second spring shaft 46 is arranged between the second valve leaf 22 and the second vent 12, and the second torsion spring 44 is passed through the second spring shaft 46. One end of the first torsion spring 43 abuts on the first valve leaf 21, and the other end abuts on the frame near the fixed end of the first valve leaf 21; one end of the second torsion spring 44 abuts on the second valve leaf 22, and the other end abuts on the frame near the fixed end of the second valve leaf 22. In this embodiment, the positioning device can also be a first positioning rod 31 arranged in the middle position of the first vent 11, or a second positioning rod 32 and a third positioning rod 33 arranged inside the frame 1 and symmetrically arranged on both sides of the middle position of the first vent 11.

[0057] In order to prevent the torsion spring from shifting along the x-direction, a limiting structure may be provided between adjacent torsion springs. The limiting structure may be a partition plate 7 provided at the end of the torsion spring, or a polytetrafluoroethylene sleeve may be embedded between the torsion springs to play a limiting role.

[0058] When a shock wave comes, the valve leaf 2 is in a closed position under the action of the shock wave, and the valve leaf 2 is against the frame 1. In order to reduce the bending deformation of the valve leaf 2 and prevent the valve leaf 2 from being damaged under the action of the shock wave, a reinforcing rib 13 can be provided at the second vent 12, so that the valve leaf 2 is against the reinforcing rib 13, and the reinforcing rib 13 further supports the valve leaf 2. A reinforcing rib 13 extending along the x-direction can be provided at the middle position of the second vent 12, or a plurality of reinforcing ribs 13 extending along the x-direction can be provided at the second vent 12. Preferably, one reinforcing rib 13 is provided at the middle position of the second vent 12, and the other plurality of reinforcing ribs 13 are symmetrically provided on both sides of the middle position of the second vent 12. Preferably, on the inner side of the frame 1, the reinforcing rib 13 is flush with the frame 1, so that when the valve leaf 2 is in a closed position, the valve leaf 2 is parallel to the plane where the second vent 12 is located.

[0059] 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, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-blade cross anti-explosion valve, characterized in that: include: frame, valve leaf, positioning device and return spring; wherein, The frame includes a first vent and a second vent that are arranged opposite to each other; The valve leaf comprises a first valve leaf and a second valve leaf which are arranged alternately, the first valve leaf and the second valve leaf each having a fixed end and a free end, the fixed end being hinged to the frame of the second vent, and the fixed end of the first valve leaf and the fixed end of the second valve leaf are respectively arranged on the frames opposite to the second vent; The positioning device extends along the direction of the frame hinged to the fixed end, and its two ends are connected to the frame away from the second vent; the extension direction of the frame hinged to the fixed end is set to the x direction; The valve leaf has an open position and a closed position, and the return spring causes the valve leaf to be located in the open position; When the valve leaf is in the open position, the valve leaf and the plane where the second vent is located have an opening angle α, and α is an acute angle not greater than 60°, and the valve leaf abuts against the positioning device; when the valve leaf is in the closed position, the valve leaf abuts against the frame and can cover more than 90% of the second vent.

2. The multi-blade cross anti-explosion valve according to claim 1, characterized in that: The first valve leaf and the second valve leaf have the same shape and size.

3. The multi-blade cross anti-explosion valve according to claim 1 or 2, characterized in that: The number of the first valve leaf and the number of the second valve leaf are both one or a plurality of the first valve leaves arranged along the x direction; When the valve leaf is located at the closed position, the valve leaf can cover the entire second ventilation opening.

4. The multi-blade cross anti-explosion valve according to claim 3, characterized in that: The opening angle α is 30°-45°.

5. The multi-blade cross anti-explosion valve according to claim 1, characterized in that: The return spring includes a first tension spring and a second tension spring.

6. The multi-blade cross anti-explosion valve according to claim 5, characterized in that: The positioning device includes a first positioning rod arranged in the middle position of the first vent; one end of the first tension spring is connected to the first valve leaf, and the other end is connected to the first positioning rod; one end of the second tension spring is connected to the second valve leaf, and the other end is connected to the first positioning rod; when the valve leaf is in the open position, the first valve leaf and the second valve leaf both rest against the first positioning rod.

7. The multi-blade cross anti-explosion valve according to claim 5, characterized in that: The positioning device includes a second positioning rod and a third positioning rod, which are arranged inside the frame and symmetrically on both sides of the middle position of the first vent; one end of the first tension spring is connected to the first valve leaf, and the other end is connected to the second positioning rod; one end of the second tension spring is connected to the second valve leaf, and the other end is connected to the third positioning rod; when the valve leaf is in the open position, the first valve leaf abuts against the second positioning rod, and the second valve leaf abuts against the third positioning rod.

8. The multi-blade cross anti-explosion valve according to claim 6 or 7, characterized in that: One end of the first tension spring is connected to the end of the free end of the first valve leaf, and one end of the second tension spring is connected to the end of the free end of the second valve leaf.

9. The multi-blade cross anti-explosion valve according to claim 1, characterized in that: The return spring comprises a first torsion spring and a second torsion spring; The frame is also connected to a first spring shaft and a second spring shaft extending along the x direction, the first spring shaft is arranged between the first valve leaf and the second vent, and the first torsion spring is passed through the first spring shaft; the second spring shaft is arranged between the second valve leaf and the second vent, and the second torsion spring is passed through the second spring shaft; One end of the first torsion spring abuts against the first valve leaf, and the other end abuts against the frame close to the fixed end of the first valve leaf; one end of the second torsion spring abuts against the second valve leaf, and the other end abuts against the frame close to the fixed end of the second valve leaf.

10. The multi-blade cross anti-explosion valve according to claim 1, characterized in that: A reinforcing rib extending along the x-direction is provided at the middle position of the second vent; And / or, a plurality of reinforcing ribs extending along the x-direction are arranged at the second vent, and the plurality of reinforcing ribs are symmetrically arranged on both sides of the middle position of the second vent; When the valve leaf is in the closed position, the valve leaf abuts against the reinforcing rib.

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