Large-air-volume anti-explosion valve

Abstract

The utility model relates to a large air volume anti-explosion valve, which comprises a valve frame, valve blades and a valve blade opening and closing transmission mechanism, a plurality of valve blades are rotatably arranged in the valve frame, two adjacent valve blades are rotatably matched, the valve blade opening and closing transmission mechanism is arranged outside the valve frame, and the large air volume anti-explosion valve is characterized in that each valve blade comprises a blade main body, a rotating shaft mounting groove is formed in the lower portion of the blade body, and a bent plate is formed on the upper portion and forms an included angle with the horizontal direction. The utility model has the advantages that the structure of the valve blade is optimized, the material cost is saved, the concentricity of the valve blade is improved, and the valve blade is more convenient to produce and install; the positioning pin is added for fine positioning, the requirement for concentricity of the valve frame is met, machining is convenient, and working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a large air volume anti-explosion valve, belonging to the field of chemical industry. Background Art

[0002] An explosion-proof valve, also known as an explosion-proof valve or safety valve, is a device used to control and mitigate pressure waves and shock waves during an explosion. In potentially hazardous industrial environments such as chemical plants, oil refineries, natural gas processing plants, flour mills, etc., explosion-proof valves are essential to protect personnel and equipment from the hazards of explosions.

[0003] The explosion-proof valve is normally open. When an explosion occurs, the shock wave will cause the valve leaf to close, thereby protecting the outdoor or indoor safety (the valve leaf facing indoors protects the outdoor; the valve leaf facing outdoor protects the indoor). After the explosion, the valve leaf will open again under the action of the spring. It has the following functions:

[0004] Slow down shock waves: Anti-explosion valves can slow down the propagation of shock waves caused by explosions and reduce the damage of pressure waves to the surrounding environment and equipment.

[0005] Protect equipment and personnel safety: By reducing the impact of pressure and shock waves, explosion-proof valves can effectively protect equipment and personnel from serious injuries.

[0006] Explosion-proof valves are usually selected and installed according to their design pressure, flow capacity and application environment. They play a key role in industrial safety and are one of the important equipment to minimize property losses and ensure workplace safety.

[0007] In industrial production, the correct selection, regular maintenance and inspection of explosion-proof valves are essential to ensure that they can function accurately and reliably when necessary. These devices are often regulated by specific standards and regulations to ensure that they meet safety requirements and can protect the environment and personnel from potential hazards.

[0008] The disadvantages of the prior art are: the transmission mechanism of the explosion-proof valve includes a blade shaft (square), a valve leaf, a rotating plate, a connecting rod, a rotating plate, a locating pin and a bolt; however, the disadvantage of this solution is that there are errors in the processing of sheet metal parts, and errors during assembly lead to assembly difficulties, and it is difficult to meet the concentricity requirements of the valve frame hole. Moreover, the blade shaft is square and difficult to process, and there are certain requirements for processing accuracy, and the installation is time-consuming and labor-intensive. Utility Model Content

[0009] In order to overcome the defects of the prior art, the utility model provides a large air volume anti-explosion valve. The technical solution of the utility model is:

[0010] A large air volume anti-riot valve, comprising a valve frame, a valve leaf and a valve leaf opening and closing transmission mechanism, wherein a plurality of valve leaves are rotatably installed inside the valve frame, and two adjacent valve leaves are rotatably matched with each other, and a valve leaf opening and closing transmission mechanism is installed outside the valve frame, wherein the valve leaf comprises a blade body, a shaft mounting groove is formed at the lower part of the blade body, and a bending plate is formed at the upper part, and the bending plate forms an angle with the horizontal direction; a shaft is respectively installed at both ends of the shaft mounting groove, and the two shafts are symmetrically arranged in the shaft mounting groove, one end of each shaft is inserted into the shaft mounting groove, and the other end is rotatably installed on the valve frame, and is transmission-connected with the valve leaf opening and closing transmission mechanism; on the shaft, a plurality of shaft threaded holes are arranged along the length direction of the shaft, and a blade through hole corresponding to the shaft threaded hole is arranged on the blade body, and after the shaft connecting bolt passes through the blade through hole and the shaft threaded hole, the blade body and the shaft are connected together.

[0011] The valve frame comprises an upper frame, a lower frame and a side frame. The upper frame and the lower frame are arranged in parallel with each other and form a gap. Two side frames arranged in parallel with each other are installed between the upper frame and the lower frame. A space for installing a valve leaf is formed between the two side frames and the upper frame and the lower frame. The upper frame and the side frame, as well as the lower frame and the side frame, are connected together through a positioning connection unit. The positioning connection unit comprises a positioning pin, a frame connecting bolt, an inner flat washer, an outer flat washer, a frame connecting nut and an elastic washer. Positioning pins are installed between the upper frame and the side frame, as well as between the lower frame and the side frame. When connecting the upper frame and the side frame, the connecting end of the frame connecting bolt passes through the elastic washer, the outer flat washer, the side frame, the upper frame and the inner flat washer in sequence, and then the frame connecting nut is installed. When connecting the lower frame and the side frame, the connecting end of the frame connecting bolt passes through the elastic washer, the outer flat washer, the side frame, the lower frame and the inner flat washer in sequence, and then the frame connecting nut is installed.

[0012] The valve leaf opening and closing transmission mechanism includes a transmission connecting plate, a connecting rod, a front connecting screw, a front self-locking nut, a rear connecting screw, a rear self-locking nut and an elastic force adjustment unit. Each of the rotating shafts is connected to the transmission connecting plate through a blade connecting bolt, and all the transmission connecting plates are rotatably matched with the connecting rod. Specifically, the blade connecting bolt passes through the through hole on the transmission connecting plate and is threadedly connected to the rotating shaft thread groove set on the rotating shaft. The front connecting screw is also installed on the transmission connecting plate, and the front connecting screw is installed with the front self-locking nut after passing through the connecting rod; the rear end of the elastic force adjustment unit is connected to the connecting rod through the rear connecting screw and the rear self-locking nut, and the front end of the elastic force adjustment unit is connected to the side frame.

[0013] The elastic force adjustment unit includes a tension spring, a threaded hook, a fixed block and an angle adjustment block. The rear connecting screw is installed on the connecting rod. The rear connecting screw passes through one end of the tension spring and is installed with a rear self-locking nut. The other end of the tension spring is connected to one end of the threaded hook, and the other end of the threaded hook is connected to the fixed block. The fixed block is installed on the angle adjustment block; the angle adjustment block is adjustably installed on the side frame.

[0014] A first gasket and a second gasket are installed between the blade connecting bolt and the transmission connecting plate, and the first gasket and the second gasket are distributed on both sides of the transmission connecting plate.

[0015] The utility model has the advantages of optimizing the valve leaf structure, saving material costs, improving the concentricity of the valve leaf, and making its production and installation more convenient; adding positioning pins for precise positioning, meeting the concentricity requirements of the valve frame, facilitating processing, and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the main structure of the utility model.

[0017] Figure 2 yes Figure 1 Schematic diagram of the structure of the opening and closing transmission mechanism of the middle valve leaf.

[0018] Figure 3 yes Figure 1 Schematic diagram of the structure of the middle valve frame.

[0019] Figure 4 yes Figure 1 Schematic diagram of the structure of the middle valve leaf. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with specific embodiments, and the advantages and features of the present invention will become clearer as the description proceeds. However, these embodiments are merely exemplary and do not constitute any limitation to the scope of the present invention. It should be understood by those skilled in the art that the details and forms of the technical solution of the present invention may be modified or replaced without departing from the spirit and scope of the present invention, but these modifications and replacements fall within the scope of protection of the present invention.

[0021] See also Figures 1 to 4 The utility model relates to a large air volume anti-explosion valve, including a valve frame, a valve leaf and a valve leaf opening and closing transmission mechanism. A plurality of valve leaves are rotatably installed inside the valve frame, and two adjacent valve leaves are rotatably matched. A valve leaf opening and closing transmission mechanism is installed outside the valve frame, such as Figure 4As shown, the valve leaf includes a blade body 13, a shaft mounting groove is formed at the lower part of the blade body 13, and a bending plate is formed at the upper part, the bending plate forms an angle with the horizontal direction, and the setting of the angle enables the bending plate to play a buffering and blocking role for wind; a shaft 11 is respectively installed at both ends of the shaft mounting groove, and the two shafts 11 are symmetrically arranged in the shaft mounting groove, one end of each shaft 11 is inserted into the shaft mounting groove, and the other end is rotatably installed on the valve frame and is transmission-connected with the valve leaf opening and closing transmission mechanism; on the shaft 11, a plurality of shaft threaded holes are arranged along the length direction of the shaft 11, and a blade through hole corresponding to the shaft threaded hole is arranged on the blade body 13, and after the shaft connecting bolt passes through the blade through hole and the shaft threaded hole, the blade body 13 and the shaft 11 are connected together; in this embodiment, there are three shaft connecting bolts on each shaft 11.

[0022] The valve frame includes an upper frame 141, a lower frame 142 and a side frame 15. The upper frame and the lower frame are arranged in parallel with each other and form a gap. Two side frames 15 arranged in parallel with each other are installed between the upper frame 141 and the lower frame 142. A space for installing a valve leaf is formed between the two side frames 15 and the upper frame 141 and the lower frame 142. The upper frame 141 and the side frame 15, as well as the lower frame 142 and the side frame 15 are connected together through a positioning connection unit. The positioning connection unit includes a positioning pin 16, a frame connecting bolt 17, an inner flat washer 20, an outer flat washer 19, a frame connecting nut 21 and an elastic gasket 18. Between the upper frame 141 and the side frame 15, and Locating pins 16 are installed between the lower frame 142 and the side frame 15. When connecting the upper frame 141 and the side frame 15, the connecting end of the frame connecting bolt 17 passes through the elastic gasket 18, the outer flat gasket 19, the side frame 15, the upper frame 141 and the inner flat gasket 20 in sequence, and then the frame connecting nut 141 is installed; when connecting the lower frame 142 and the side frame 15, the connecting end of the frame connecting bolt 17 passes through the elastic gasket 18, the outer flat gasket 19, the side frame 15, the lower frame 142 and the inner flat gasket 20 in sequence, and then the frame connecting nut 21 is installed. By setting the locating pins 16, the installation accuracy of the side frame 15 and the upper frame 141 and the lower frame 142 is improved.

[0023] like Figure 2As shown, the valve leaf opening and closing transmission mechanism includes a transmission connecting plate 9, a connecting rod 1, a front connecting screw, a front self-locking nut 6, a rear connecting screw, a rear self-locking nut 3 and an elastic force adjustment unit. Each of the rotating shafts 11 is connected to the transmission connecting plate 9 through a blade connecting bolt 7, and all the transmission connecting plates 9 are rotatably matched with the connecting rod 1, specifically: after the blade connecting bolt 7 passes through the through hole on the transmission connecting plate 9, it is threadedly connected to the rotating shaft thread groove set on the rotating shaft 11, and the front connecting screw is also installed on the transmission connecting plate 9, and the front connecting screw is installed with the front self-locking nut 6 after passing through the connecting rod 1; the rear end of the elastic force adjustment unit is connected to the connecting rod 1 through the rear connecting screw and the rear self-locking nut 3, and the front end of the elastic force adjustment unit is connected to the side frame.

[0024] The elastic force adjustment unit includes a tension spring 2, a threaded hook 4, a fixed block 5 and an angle adjustment block 12. The rear connecting screw is installed on the connecting rod 1, and the rear connecting screw is installed with a rear self-locking nut 3 after passing through one end of the tension spring 2. The other end of the tension spring 2 is connected to one end of the threaded hook 4, and the other end of the threaded hook 4 is connected to the fixed block 5. The fixed block 5 is installed on the angle adjustment block 12; the angle adjustment block 12 is adjustably installed on the side frame 15.

[0025] A first gasket 8 and a second gasket 11 are installed between the blade connecting bolt 7 and the transmission connecting plate 9 . The first gasket 8 and the second gasket 11 are distributed on both sides of the transmission connecting plate 9 .

[0026] The working principle of the utility model is:

[0027] When the pressure in the space exceeds the limit, the blade body 13 of the valve leaf drives the rotating shaft 11 to deflect. When the blade body 13 rotates, a gap is formed between two adjacent blade bodies to release the pressure. When the pressure is reduced, the rotating shaft of the blade body pulls the connecting rod 1 back to its original position under the action of the tension spring 2, and the connecting rod drives all the rotating shafts 11 to reset, thereby achieving the closure of the valve leaf.

[0028] The rotating shaft in the utility model is two short shafts. Through the setting of the rotating shaft, the positioning pins can be eliminated and replaced with simple bolt fixation; positioning pins are added between the four parts of the valve frame for precise positioning; and bolt fixation is added at special points, which can ensure the concentricity requirements and make installation more convenient.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A large air volume anti-explosion valve, comprising a valve frame, a valve leaf and a valve leaf opening and closing transmission mechanism, wherein a plurality of valve leaves are rotatably mounted inside the valve frame, and two adjacent valve leaves are rotatably matched, and a valve leaf opening and closing transmission mechanism is mounted outside the valve frame, characterized in that: The valve leaf comprises a blade body, a shaft mounting groove is formed at the lower part of the blade body, and a bending plate is formed at the upper part, and the bending plate forms an angle with the horizontal direction; a shaft is respectively installed at both ends of the shaft mounting groove, and the two shafts are symmetrically arranged in the shaft mounting groove, one end of each shaft is inserted into the shaft mounting groove, and the other end is rotatably installed on the valve frame and is connected to the valve leaf opening and closing transmission mechanism; on the shaft, a plurality of shaft threaded holes are arranged along the length direction of the shaft, and a blade through hole corresponding to the shaft threaded hole is arranged on the blade body, and after the shaft connecting bolt passes through the blade through hole and the shaft threaded hole, the blade body and the shaft are connected together.

2. The large air volume anti-explosion valve according to claim 1 is characterized in that: The valve frame comprises an upper frame, a lower frame and a side frame. The upper frame and the lower frame are arranged in parallel with each other and form a gap. Two side frames arranged in parallel with each other are installed between the upper frame and the lower frame. A space for installing a valve leaf is formed between the two side frames and the upper frame and the lower frame. The upper frame and the side frame, as well as the lower frame and the side frame, are connected together through a positioning connection unit. The positioning connection unit comprises a positioning pin, a frame connecting bolt, an inner flat washer, an outer flat washer, a frame connecting nut and an elastic washer. Positioning pins are installed between the upper frame and the side frame, as well as between the lower frame and the side frame. When connecting the upper frame and the side frame, the connecting end of the frame connecting bolt passes through the elastic washer, the outer flat washer, the side frame, the upper frame and the inner flat washer in sequence, and then the frame connecting nut is installed. When connecting the lower frame and the side frame, the connecting end of the frame connecting bolt passes through the elastic washer, the outer flat washer, the side frame, the lower frame and the inner flat washer in sequence, and then the frame connecting nut is installed.

3. The large air volume anti-explosion valve according to claim 2 is characterized in that: The valve leaf opening and closing transmission mechanism includes a transmission connecting plate, a connecting rod, a front connecting screw, a front self-locking nut, a rear connecting screw, a rear self-locking nut and an elastic force adjustment unit. Each of the rotating shafts is connected to the transmission connecting plate through a blade connecting bolt, and all the transmission connecting plates are rotatably matched with the connecting rod. Specifically, the blade connecting bolt passes through the through hole on the transmission connecting plate and is threadedly connected to the rotating shaft thread groove set on the rotating shaft. The front connecting screw is also installed on the transmission connecting plate, and the front connecting screw is installed with the front self-locking nut after passing through the connecting rod; the rear end of the elastic force adjustment unit is connected to the connecting rod through the rear connecting screw and the rear self-locking nut, and the front end of the elastic force adjustment unit is connected to the side frame.

4. The large air volume anti-explosion valve according to claim 3 is characterized in that: The elastic force adjustment unit includes a tension spring, a threaded hook, a fixed block and an angle adjustment block. The rear connecting screw is installed on the connecting rod. The rear connecting screw passes through one end of the tension spring and is installed with a rear self-locking nut. The other end of the tension spring is connected to one end of the threaded hook, and the other end of the threaded hook is connected to the fixed block. The fixed block is installed on the angle adjustment block; the angle adjustment block is adjustably installed on the side frame.

5. The large air volume anti-explosion valve according to claim 4 is characterized in that: A first gasket and a second gasket are installed between the blade connecting bolt and the transmission connecting plate, and the first gasket and the second gasket are distributed on both sides of the transmission connecting plate.

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