Blade type anti-explosion wave valve with two-way ventilation protection function

Abstract

The invention provides a two-way ventilation protection blade type anti-explosion wave valve, and aims to simplify a protection structure of an outdoor air port of a nuclear power station and improve the performance of the protection structure. The valve integrates the functions of rain prevention, shock wave resistance and flying object collision prevention, and is suitable for extreme environments. Bending and arc design is adopted for the blades, the bearing capacity and the deformation resistance are enhanced, and the opening angle is adjustable. Two-way ventilation is supported under normal conditions; in case of explosion, the device can be quickly closed to isolate shock waves, protect the safety in a building, and automatically reset without manual intervention. By means of the design, the large ventilation quantity is ensured, the device can adapt to the environment without electric power, safety and practicability are improved, and a reliable ventilation solution is provided for special occasions.

Description

Technical Field

[0001] The present invention belongs to the technical field of special HVAC equipment and relates to a vane-type explosion-proof wave valve with two-way ventilation protection. Background Art

[0002] In existing power plant designs, generally, explosion-proof wave valves are installed inside or outside the outdoor air vents to protect against the positive pressure generated by shock waves and the negative pressure generated by tornadoes. The explosion-proof wave valve can quickly close when there is an instantaneous overpressure, isolate the indoor and outdoor air, prevent the ventilation system from being impacted by the instantaneous pressure wave, and ensure the integrity of the ventilation system pipeline and equipment.

[0003] The existing protection device for the outdoor air vents of nuclear power plants uses a combination of an explosion-proof wave valve, a projectile-proof facility, and a rain-proof louver to complete effective protection. The structure is complex and the resistance performance is poor.

[0004] Among the existing explosion-proof wave valves on the market, one type is a single-sided spring that can only provide one-way ventilation, that is, it can only protect against the positive pressure stage of the shock wave. When there is a negative pressure situation after an explosion, such valves can no longer play a protective role, and manual reset is required after an accident. Currently, the explosion-proof wave valves on the market that can resist shock waves in both directions generally have a small ventilation volume. If there are explosion sources inside and outside in some special occasions, the shock wave valve is required to have the ability to resist shock waves in both directions, and the ventilation volume per unit area is required to be very large, and it can be instantaneously closed under both positive and negative pressure conditions to play a protective role.

[0005] However, the existing explosion-proof wave valves on the market have certain defects. Some have a rain-proof function but lack the ability to resist shock waves, while the valves with the ability to resist shock waves often lack a rain-proof function, or the valves do not have the function of preventing impact from tornado projectiles. Therefore, in order to achieve effective protection, an explosion-proof wave valve that can resist explosion in both directions, reset in both directions, ventilate in both directions, and integrate the protection functions of outdoor air vents is needed.

[0006] The utility model patent with the publication number CN219866475 discloses an explosion-proof wave valve. A ventilation port group is arranged in the valve body, and each ventilation port group is composed of an outer ventilation port on the front of the valve body and an inner ventilation port on the back of the valve body; a sealing rod and a spring assembly are arranged between the outer ventilation port and the inner ventilation port. The spring assembly is located between the spring limiting plate in the sealing rod and the outer ventilation port and between the spring limiting plate and the inner ventilation port, solving the problem that the existing explosion-proof wave valve cannot resist explosion and ventilate bidirectionally. However, in this patent, the protection problem of the outdoor air outlet is not involved. And a vane type explosion-proof wave valve with two-way ventilation protection provided by this application integrates various protection functions of the outdoor air outlet in addition to two-way explosion resistance, two-way reset, and two-way ventilation, and can prevent rain, resist shock waves, and protect against the impact of tornado projectiles. The explosion-proof wave valve vane adopts a bending and arc design, which helps to improve the bearing capacity and anti-deformation ability of the vane, and allows the opening angle of the vane to be adjusted to adapt to different working conditions. Summary of the Invention

[0007] In order to achieve the above object, the present invention provides a vane type explosion-proof wave valve with two-way ventilation protection, solving the problems of complex protection structure and poor resistance performance of the existing outdoor air outlet of nuclear power plants.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is a vane type explosion-proof wave valve with two-way ventilation protection, which is characterized in that it includes a valve body frame. The valve body frame includes an upper and lower frame and side frames welded together. Upper and lower valve seats are welded inside the upper and lower frames of the valve body frame. Valve body reinforcing ribs are also welded and fixed on the upper and lower frames. Two shaft holes are respectively provided on both sides of the side frames and are distributed in a 2×2 manner. The two sides of the shaft holes are concentric in the horizontal direction and are on the same straight line in the vertical direction; there are 2 pieces of shaft one and shaft two respectively. Shaft one horizontally passes through the upper 2 groups of shaft holes respectively, and shaft two horizontally passes through the lower 2 groups of shaft holes respectively. Bearing end cover holes are provided in the direction with a 30° horizontal angle for the 2 shaft holes at the lower left of the side frame, and bearing through cover holes are provided in the direction with a 30° horizontal angle for the 2 shaft holes at the upper left of the side frame and the 4 shaft holes on the right side of the side frame; the bearing end cover holes and the bearing through cover holes are also concentric on both sides in the horizontal direction and are on the same straight line in the vertical direction.

[0009] Further, bearing covers and bearing end caps are fixed on both sides of the side frame. There are 6 bearing covers in total. After the hexagon head bolts pass through the holes of the bearing covers, the bearing covers are respectively fixed on two over-axis holes above the left side and four over-axis holes on the right side of the side frame through lock nuts II; there are 2 bearing end caps in total. After the hexagon head bolts pass through the holes of the bearing end caps, the bearing end caps are respectively fixed on two over-axis holes below the left side of the side frame through lock nuts II; Shaft I passes through the bearing covers at both ends, one end of Shaft II passes through the bearing cover, and the other end is installed inside the bearing end cap; self-lubricating bearings are provided inside the bearing covers and bearing end caps, and the inner diameter of the self-lubricating bearings is assembled with the outer diameters at the shaft shoulders at both ends of Shaft I and Shaft II.

[0010] Further, a threaded plate is welded on the inner side of the side frame. The threaded plate is provided with threaded holes. Limiting bracket bases are welded on both sides below the side frame, a pull rod bracket base is welded at the center position below, and a hoisting plate is also welded at the center line above.

[0011] Further, straight pin holes are provided in the middle and on both sides of Shaft I, Shaft II, and the blades. After the straight pins pass through the straight pin holes on the blades and the shafts, the 4 blades are respectively fixed on Shaft I and Shaft II through lock nuts I and the threads at the ends of the straight pins. The blades rotate synchronously with Shaft I and Shaft II. The upper and lower ends of the blades are bent, and an arc is provided in the middle.

[0012] Further, swing arms are provided at the right shaft ends of Shaft I and Shaft II, and the swing arms are fixed on Shaft I and Shaft II through inner hexagon socket head cap screws and flat keys; the swing arms on Shaft I and Shaft II are connected by a connecting rod. Pin holes are provided at the ends of the swing arms and both ends of the connecting rod, and the connecting rod is fixed on the swing arms through pin shafts and pin holes.

[0013] Further, a pointer is provided at the left shaft end of Shaft I, and the pointer is fixed at the left shaft end of Shaft I through a pointer bolt and a threaded hole at the center of the left shaft head of Shaft I. The pointer rotates with Shaft I and points to the blade opening indicator board; The blade opening indicator board is welded at the position below the tip of the pointer below the over-axis hole above. The blade opening indicator board is provided with a scale indication of 0-90°.

[0014] Further, a limiting bracket is provided on the limiting bracket base, and the limiting bracket is fixed on the limiting bracket base through a base bolt I and a threaded hole of the limiting bracket base; A pull rod bracket is provided on the pull rod bracket base, and the pull rod bracket is fixed on the pull rod bracket base through a base bolt II and a threaded hole of the pull rod bracket base; The hoisting plate is provided with a hoisting hole for facilitating the hoisting of the valve.

[0015] Furthermore, a pull rod bolt is provided on the pull rod bracket and fixed by a pull rod nut. The pull rod bolt is provided with a pull rod bolt spring hole, and the connecting rod is also provided with a connecting rod spring hole. One end of the spring is fixedly connected to the pull rod bolt spring hole, and the other end is fixedly connected to the connecting rod spring hole.

[0016] Furthermore, a limit bracket is provided directly below the swing arm and fixed to the limit bracket base by a base bolt 1. A limit bolt is provided on the limit bracket and fixed to the limit bracket through the bolt hole of the limit bracket and a limit nut; the bolt head of the limit bolt is located directly below the swing arm and on the rotation trajectory of the swing arm with axis 2 as the center.

[0017] The beneficial effects of the present invention are: 1. Under normal ventilation conditions, the blast wave valve is in an open state, and air flow can pass through the ventilation opening from any direction to achieve two-way ventilation. When an explosion occurs, it can protect against both the positive pressure stage and the negative pressure stage of the shock wave, comprehensively protecting the personnel and facilities inside the building. After the explosion shock wave disappears, it can automatically return to the initial state and continue to provide normal ventilation function without manual reset, having the functions of two-way explosion resistance and two-way ventilation.

[0018] 2. The blast wave valve integrates various protection functions of the outdoor air outlet. It can not only prevent rainwater from entering the building to corrode equipment or air ducts, but also prevent shock waves from entering the building to damage personnel and equipment, and at the same time has the function of protecting against the impact of tornado projectiles.

[0019] 3. The blast wave valve has a large effective ventilation area and strong ventilation capacity.

[0020] 4. The opening angle of the blast wave valve blades can be appropriately adjusted to meet the requirements under different working conditions.

[0021] 5. After the shock wave, the pressure difference of the blast wave valve decreases, and the blades can automatically reset under the action of the spring to restore normal ventilation. The whole process does not require electricity, saves energy, and is suitable for environments without electricity. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 It is the left view of the blast wave valve body frame of the present invention.

[0024] Figure 2It is the right view of the blast wave valve body frame of the present invention.

[0025] Figure 3 It is the front view of the blast wave valve of the present invention.

[0026] Figure 4 It is the B-B view of the blast wave valve of the present invention.

[0027] Figure 5 It is the left view of the blast wave valve of the present invention.

[0028] Figure 6 It is the P-direction view of the blast wave valve of the present invention.

[0029] Figure 7 It is the A-A view of the blast wave valve of the present invention (blade opening state).

[0030] Figure 8 It is the A-A view of the blast wave valve of the present invention (blade closing state).

[0031] In the figure, 1. Valve body frame, 2. Blade, 3. Upper and lower frames, 4. Straight pin, 5. Locking nut 1, 6. Valve body stiffening rib, 7. Bearing gland, 8. Pointer bolt, 9. Pointer, 10. Blade opening indicator plate, 11. Bearing end cover, 12. Upper and lower valve seats, 13. Shaft 1, 14. Shaft 2, 15. Connecting rod, 16. Spring, 17. Limit bracket, 18. Base bolt 1, 19. Tie rod bracket, 20. Base bolt 2, 21. Limit bolt, 22. Limit nut, 23. Tie rod bolt, 24. Tie rod nut, 25. Side frame, 26. Threaded plate, 27. Hexagon head bolt, 28. Locking nut 2, 29. Self-lubricating bearing, 30. Limit bracket base, 31. Tie rod bracket base, 32. Pin shaft, 33. Swing arm, 34. Flat key, 35. Socket head cap screw, 36. Lifting plate, 37. Shaft through hole, 38. Bearing gland hole, 39. Bearing end cover hole, 40. Tie rod bracket base threaded hole, 41. Limit bracket base threaded hole, 42. Drain hole, 43. Connecting rod spring hole, 44. Tie rod bolt spring hole, 45. Pin shaft hole, 46. Straight pin hole. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] As shown in Figures 1-8, this embodiment provides a blade-type blast wave valve for two-way ventilation protection, including a valve body frame 1. The valve body frame 1 includes an upper and lower frame 3 and side frames 25 that are combined and welded. The upper and lower valve seats 12 are welded inside the upper and lower frames 3 of the valve body frame 1.

[0034] Four shaft through holes 37 are respectively provided on both sides of the side frame 25 and are distributed in a 2×2 manner. The two sides of the shaft through holes 37 are concentric in the horizontal direction and are on the same straight line in the vertical direction. There are two pieces of shaft one 13 and two pieces of shaft two 14 respectively. The shaft one 13 respectively passes horizontally through the upper two groups of shaft through holes 37, and the shaft 2 respectively passes horizontally through the lower two groups of shaft through holes 37.

[0035] Bearing end cover holes 39 are provided in the two shaft through holes 37 at the lower left of the side frame 25 in the direction with a 30° horizontal angle. Bearing through cover holes 38 are provided in the two shaft through holes 37 at the upper left of the side frame 25 and the four shaft through holes 37 on the right side of the side frame 25 in the direction with a 30° horizontal angle. Setting a certain horizontal angle can avoid interference between the blade 2 and the bolt heads of the hexagon head bolts 27 of the fixed bearing through cover 7 and bearing end cover 11 when the blade 2 is opened or closed. The bearing end cover holes 39 and bearing through cover holes 38 are also concentric on both sides in the horizontal direction and are on the same straight line in the vertical direction.

[0036] There are a total of six bearing through covers 7. After the hexagon head bolts 27 pass through the bearing through cover holes 38, the bearing through covers 7 are respectively fixed on the two shaft through holes 37 at the upper left of the side frame 25 and the four shaft through holes 37 on the right side through lock nuts two 28. There are a total of two bearing end covers 11. After the hexagon head bolts 27 pass through the bearing end cover holes 39, the bearing end covers 11 are respectively fixed on the two shaft through holes 37 at the lower left of the side frame 25 through lock nuts two 28. The shaft one 13 passes through the bearing through covers 7 at both ends, and one end of the shaft two 14 passes through the bearing through cover 7 and the other end is installed inside the bearing end cover 11.

[0037] Self-lubricating bearings 29 are provided inside the bearing through covers 7 and bearing end covers 11. The inner diameter of the self-lubricating bearings 29 is assembled with the outer diameter at the shoulder of both ends of the shaft one 13 and shaft two 14. The self-lubricating bearings 29 have self-lubricating performance, do not require additional lubricating oil, can provide lubrication by themselves during use, reduce friction and wear, and ensure the rapid rotation of the shaft one 13 and shaft two 14.

[0038] Through the above design, concentricity on both sides of the shaft one 13 and shaft two 14 can be achieved, and it can be ensured that the valve does not jam during operation.

[0039] Threaded plates 26 are welded inside the side frames 25. The threaded plates 26 are provided with threaded holes, which are convenient for installing and fixing the valve with fasteners on site. Limit bracket bases 30 are welded on both sides below the side frames 25, a pull rod bracket base 31 is welded at the center position below, and a lifting plate 36 is also welded at the center line above.

[0040] A limit bracket 17 is provided on the limit bracket base 30 and fixed to the limit bracket base 30 by a base bolt 18 and a limit bracket base threaded hole 41. A pull rod bracket 19 is provided on the pull rod bracket base 31 and fixed to the pull rod bracket base 31 by a base bolt 20 and a pull rod bracket base threaded hole 40. The lifting plate 36 is provided with a lifting hole for facilitating the lifting of the valve.

[0041] Direct pin holes 46 are provided in the middle and on both sides of the first shaft 13, the second shaft 14 and the blade 2. After the direct pin 4 passes through the direct pin holes 46 on the blade 2 and the shaft, the four blades 2 are respectively fixed to the first shaft 13 and the second shaft 14 by a lock nut 5 and the thread at the end of the direct pin 4, so that the blade 2 rotates synchronously with the first shaft 13 and the second shaft 14. The arc surface parts of the first shaft 13, the second shaft 14 in contact with the blade 2 and the lock nut 5 have been machined into planes, ensuring the stability of the assembly connection of the blade 2 and the lock nut 5.

[0042] Rotating arms 33 are provided at the right shaft ends of the first shaft 13 and the second shaft 14 and fixed to the first shaft 13 and the second shaft 14 by hexagon socket head cap screws 35 and flat keys 34. The rotating arms 33 on the first shaft 13 and the second shaft 14 are connected by a connecting rod 15. Pin holes 45 are provided at the ends of the rotating arms 33 and at both ends of the connecting rod 15, and the connecting rod 15 is fixed to the rotating arms 33 by a pin 32 and the pin holes 45. There are 2 connecting rods 15 in total. When installed, one can be on the indoor side and the other on the outdoor side. When an explosion occurs indoors or outdoors, the shock wave acts on the blade 2, the blade 2 drives the first shaft 13 and the second shaft 14 to rotate along the axis, the first shaft 13 and the second shaft 14 drive the rotating arms 33 to rotate, and the rotating arms 33 drive the connecting rod 15 to act together. The above design makes the blade 2, the first shaft 13, the second shaft 14, the rotating arms 33 and the connecting rod 15 form an integral linkage mechanism, thus realizing the synchronous opening and closing of the blade 2.

[0043] A pointer 9 is provided at the left shaft end of the first shaft 13 and fixed to the left shaft end of the first shaft 13 by a pointer bolt 8 and a threaded hole at the center of the left shaft head of the first shaft 13. The pointer 9 rotates with the first shaft 13 and points to the blade opening indicator 10. The blade opening indicator 10 is welded at the position below the tip of the pointer 9 below the over - shaft hole 37 above. The blade opening indicator 10 is provided with a scale indication from 0 to 90°.

[0044] The pull rod bolt 23 is fixed to the pull rod bracket 19 by a pull rod nut 24. The pull rod bolt 23 is provided with a pull rod bolt spring hole 44, and the connecting rod 15 is also provided with a connecting rod spring hole 43. One end of the spring 16 is fixedly connected to the pull rod bolt spring hole 44, and the other end is fixedly connected to the connecting rod spring hole 43.

[0045] After loosening the tie rod nut 24, manually adjust the relative position of the tie rod bolt 23 relative to the tie rod bracket 19. Drive the spring 16 to act through the tie rod bolt 23. The pulling force of the spring 16 drives the connecting rod 15 to act. The connecting rod 15 drives the swing arm 33 to act together. The swing arm 33 drives the first shaft 13 and the second shaft 14 to rotate. The first shaft 13 and the second shaft 14 drive the blade 2 to rotate, thereby realizing the opening and closing of the blade 2. According to the angle at which the pointer 9 points to the blade opening indicator plate 10, adjust the blade 2 to the specified angle, and fix the tie rod bolt 23 on the tie rod bracket 19 by tightening the tie rod nut 24, thereby achieving the purpose of adjusting the opening angle of the blade 2.

[0046] A limit bracket 17 is arranged directly below the swing arm 33, and the limit bracket 17 is fixed on the limit bracket base 30 by the base bolt one 18. A limit bolt 21 is arranged on the limit bracket 17, and the limit bolt 21 is fixed on the limit bracket 17 through the bolt hole of the limit bracket 17 and the limit nut 22. The bolt head of the limit bolt 21 is located directly below the swing arm 33 and is on the rotation track of the swing arm 33 with the second shaft 14 as the center of the circle. By adjusting the position of the limit bolt 21 relative to the limit bracket 17, the distance between the bolt head of the limit bolt 21 and the swing arm 33 is further adjusted. Through the adjustment of this distance, the rotation angle of the swing arm 33 with the second shaft 14 as the center of the circle is blocked and limited. Because the blade 2, the first shaft 13, the second shaft 14, the swing arm 33, and the connecting rod 15 are an integral linkage mechanism, the rotation angle size of the swing arm 33 with the second shaft 14 as the center of the circle can be limited through the above adjustment, and further the maximum opening angle of the blade 2 is limited. At the same time, according to the angle at which the pointer 9 points to the blade opening indicator plate 10, after adjusting the blade 2 to the maximum opening angle required by the actual working condition, tighten the limit nut 22 to fix the limit bolt 21 on the limit bracket 17, thereby achieving the purpose of limiting the maximum opening angle of the blade 2.

[0047] The upper and lower ends of the blade 2 are bent, and an arc is provided in the middle. When the blade 2 is opened, the bends at both ends of itself are beneficial to the passage of air flow and rainwater. When it is closed, the bent parts of the upper and lower blades overlap and coincide, which is beneficial to sealing. The arc design in the middle of the blade 2 can change the stress distribution, reduce local high stress points, thereby improving the overall bearing capacity and anti-deformation ability of the blade. The valve body reinforcing ribs 6 are also welded and fixed on the upper and lower frames 3, which can not only increase the strength of the valve body but also provide support for the blade 2 when it is closed. At the same time, combined with the strength of the blade 2 itself, they jointly resist the shock wave pressure and the impact of tornado flying objects.

[0048] In the normal ventilation state of this embodiment, the blades 2 are in the open state. The adjacent blades 2 form a ventilation channel and constitute a rainproof louver, which plays a rainproof role. In the indoor direction of the valve body frame 1, the upper and lower frames 3 are bent inward to prevent rainwater from entering the room. Drainage holes 42 are provided at the outdoor ventilation openings to further achieve the effects of rain prevention and drainage.

[0049] Two groups of blades 2 are respectively provided inside and outside the blast-proof valve. The adjacent blades 2 form a ventilation channel. When the blades 2 are in the open state at the same time, the purpose of two-way ventilation can be achieved. When an explosion occurs indoors or outdoors, the shock wave acts on the blades 2. The blades 2 drive the first shaft 13 and the second shaft 14 to rotate. The first shaft 13 and the second shaft 14 drive the rotating arm 33 to rotate. The connecting rod 15 follows the rotating arm 33 to move. When the shock wave acting force acts on the blades 2, the blades 2 overcome the pulling force of the spring 16 itself through the above linkage mechanism, so that the blades 2 quickly rotate along the centers of the first shaft 13 and the second shaft 14 to be completely closed. The bent parts of the blades 2 overlap and coincide. At the same time, the blades 2 are closely attached to the upper and lower valve seats 12, thereby forming a closed ventilation channel to block the shock wave outside the building, and further realizing two-way blast resistance.

[0050] Springs 16 are provided between the connecting rod 15 and the tie rod bolt 23. Therefore, no matter whether an explosion occurs indoors or outdoors, when the shock wave disappears and the pressure difference decreases, the blades 2 can automatically return to the normal ventilation state through the above linkage mechanism under the reset pulling force of the spring 16, realizing the two-way reset function and without electricity throughout the process, and automatically completing.

[0051] In summary, the blade-type blast-proof valve with two-way ventilation protection of the present invention effectively overcomes the defects of the prior art, integrates various protection functions of the outdoor air outlet, and has the functions of two-way blast resistance, two-way reset, and two-way ventilation.

[0052] Each embodiment in this specification is described in a related manner. The same or similar parts between the embodiments can be referred to each other. The key points of each embodiment are the differences from other embodiments.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A two-way ventilation protection blade-type explosion-proof wave valve, characterized in that: The valve body frame (1) comprises a valve body frame (1), wherein the valve body frame (1) comprises an upper and lower frame (3) and a side frame (25) which are welded together, and upper and lower valve seats (12) are welded inside the upper and lower frames (3) of the valve body frame (1). The upper and lower frames (3) are also welded and fixed with valve body reinforcement ribs (6); Four through-axis holes (37) are respectively provided on both sides of the side frame (25) and are distributed in a 2×2 manner, the through-axis holes (37) are concentric on both sides in the horizontal direction and are on the same straight line in the vertical direction; two pieces are respectively provided for the first axis (13) and the second axis (14), the first axis (13) respectively passes horizontally through the two groups of through-axis holes (37) above, and the second axis respectively passes horizontally through the two groups of through-axis holes (37) below; Two shaft holes (37) at the lower left side of the side frame (25) are provided with bearing end cover holes (39), and two shaft holes (37) at the upper left side of the side frame (25) and four shaft holes (37) at the right side of the side frame are provided with bearing cover holes (38); the bearing end cover holes (39) and the bearing cover holes (38) are also concentric on both sides in the horizontal direction and on the same straight line in the vertical direction.

2. A two-way ventilation and protection blade-type explosion-proof wave valve according to claim 1, characterized in that: The side frame (25) is fixed with a bearing cover (7) and a bearing end cover (11) on both sides. The bearing cover (7) is composed of 6 pieces in total. The hexagonal bolt (27) passes through the bearing cover hole (38) and is fixed to the two upper left and four right shaft holes (37) of the side frame (25) by means of a second locking nut (28). The bearing end cover (11) is composed of 2 pieces in total. The hexagonal bolt (27) passes through the bearing cover hole (39) and is fixed to the four right shaft holes (37) by means of a second locking nut (28). ) respectively fix the bearing end cover (11) on the two shaft holes (37) at the lower left side of the side frame (25); the first shaft (13) passes through the bearing cover (7) at both ends, and one end of the second shaft (14) passes through the bearing cover (7) and the other end is installed in the bearing end cover (11); the bearing cover (7) and the bearing end cover (11) are provided with a self-lubricating bearing (29) inside, and the inner diameter of the self-lubricating bearing (29) is assembled with the outer diameter of the shaft shoulders at both ends of the first shaft (13) and the second shaft (14).

3. A two-way ventilation protection blade-type explosion-proof wave valve according to claim 1, characterized in that: A threaded plate (26) is welded on the inner side of the side frame (25), and the threaded plate (26) is provided with threaded holes. A limit bracket base (30) is welded on both sides below the side frame (25), a pull rod bracket base (31) is welded at the center position below, and a hanging plate (36) is also welded at the center line above.

4. A two-way ventilation and protection blade-type explosion-proof wave valve according to claim 1, characterized in that: The shaft 1 (13), the shaft 2 (14), and the middle and both sides of the blade (2) are all provided with straight pin holes (46); the straight pin (4) passes through the straight pin holes (46) on the blade (2) and the shaft, and the four blades (2) are respectively fixed to the shaft 1 (13) and the shaft 2 (14) through the locking nut 1 (5) and the threads at the ends of the straight pin (4); the blade (2) is further bent at the upper and lower ends, and a circular arc is provided in the middle.

5. The two-way ventilation protection blade-type explosion-proof wave valve according to claim 1 is characterized in that: A swing arm (33) is provided at the right end of the shaft of the first shaft (13) and the second shaft (14), and the swing arm (33) is fixed to the first shaft (13) and the second shaft (14) by means of a hexagon socket cylindrical end set screw (35) and a key (34); the swing arms (33) on the first shaft (13) and the second shaft (14) are connected by means of a connecting rod (15), and a pin hole (45) is provided at the end of the swing arm (33) and at both ends of the connecting rod (15), and the connecting rod (15) is fixed to the swing arm (33) by means of a pin (32) and the pin hole (45).

6. The two-way ventilation protection blade-type explosion-proof wave valve according to claim 1 is characterized in that: A pointer (9) is provided at the left end of the shaft one (13), and the pointer (9) is fixed to the left end of the shaft one (13) via a pointer bolt (8) and a threaded hole at the center of the left end of the shaft head of the shaft one (13), and the pointer (9) points to the blade opening indicator (10); The blade opening indicator (10) is arranged below the needle tip of the pointer (9) below the upper through-axis hole (37), and the blade opening indicator (10) is provided with a scale indication of 0 to 90 degrees.

7. The two-way ventilation protection blade-type explosion-proof wave valve according to claim 3 is characterized in that: A limiting bracket (17) is arranged on the limiting bracket base (30), and the limiting bracket (17) is fixed to the limiting bracket base (30) via a base bolt 1 (18) and a limiting bracket base threaded hole (41); The tie rod support base (31) is provided with a tie rod support (19), and the tie rod support (19) is fixed to the tie rod support base (31) via a second base bolt (20) and a tie rod support base threaded hole (40); The hanging plate (36) is provided with a hanging hole.

8. The two-way ventilation protection blade-type explosion-proof wave valve according to claim 7 is characterized in that: The tie rod bracket (19) is provided with a tie rod bolt (23) and fixed by a tie rod nut (24); the tie rod bolt (23) is provided with a tie rod bolt spring hole (44); the connecting rod (15) is also provided with a connecting rod spring hole (43); one end of the spring (16) is connected and fixed to the tie rod bolt spring hole (44), and the other end is connected and fixed to the connecting rod spring hole (43).

9. The two-way ventilation protection blade-type explosion-proof wave valve according to claim 5, characterized in that: A limit bracket (17) is arranged directly below the swing arm (33), and the limit bracket (17) is fixed to the limit bracket base (30) via a base bolt (18); a limit bolt (21) is arranged on the limit bracket (17), and the limit bolt (21) is fixed to the limit bracket (17) via a bolt hole of the limit bracket (17) and a limit nut (22); the bolt head of the limit bolt (21) is located directly below the swing arm (33) and on a rotation trajectory of the swing arm (33) with the second axis (14) as the center.

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