Fireproof, anti-static and anti-blowing three-eccentric center butterfly valve

Abstract

The utility model relates to the technical field of three-eccentric center butterfly valves, in particular to a fireproof, anti-static and anti-blowout three-eccentric center butterfly valve which comprises an air cylinder, a positioner, a pressure reducing valve, a support and a valve body, the positioner and the pressure reducing valve are arranged on the air cylinder, the support is installed below the air cylinder, and the valve body is installed below the support. A clamping block is installed at the lower end of the connecting shaft, a valve rod is installed at the lower end of the clamping block, a filler pressing plate, a filler pressing cover and filler are installed at the position, close to the support, in the valve body from top to bottom, a valve plate is arranged in the valve body, a valve seat is installed on the left side in the valve body, and a sealing ring is arranged between the valve seat and the valve plate. The metal O-shaped ring increases the protection performance between the valve body and the valve seat and prevents fire from spreading along a downstream pipeline, the anti-static assembly is composed of the spring and the steel ball, the valve rod makes contact with the valve body, the valve rod is connected with the valve plate, and therefore static electricity between the sealing ring and the valve seat is guided out through the valve body.

Description

Technical Field

[0001] The utility model relates to the technical field of triple-eccentric butterfly valves, in particular to a fire-proof, anti-static and anti-blowout triple-eccentric butterfly valve. Background Art

[0002] A triple eccentric butterfly valve is one in which the valve stem axis deviates from both the disc center and the body center, and the valve seat rotation axis is at a certain angle to the valve body channel axis.

[0003] When the triple eccentric butterfly valve is in use, the position of the valve seat and the sealing ring is fixed, which makes it difficult to adjust. The position of the valve seat and the sealing ring is fixed, which makes it difficult to perform bidirectional sealing on the valve. Utility Model Content

[0004] The utility model aims to provide a fire-proof, anti-static and blow-out-proof three-eccentric butterfly valve.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] The fire-proof, anti-static and blow-out-proof three-eccentric butterfly valve includes a cylinder, a positioner and a pressure reducing valve on the cylinder, a bracket installed under the cylinder, and a valve body installed under the bracket. A connecting shaft is installed at the output end of the cylinder, a clamping block is installed at the lower end of the connecting shaft, and a valve stem is installed at the lower end of the clamping block. A packing pressure plate, a packing gland and a packing are installed from top to bottom in the valve body near the bracket. A valve plate is provided in the valve body, and a valve seat is installed on the left side of the valve body. A sealing ring is provided between the valve seat and the valve plate. A retaining ring and a semicircular ring are successively provided on the left side of the valve seat. A pressure ring is installed between the valve seat and the valve plate near the sealing ring, and a bottom flange is provided at the bottom of the valve body.

[0007] Preferably, an adjusting screw is passed through the retaining ring and the semicircular ring to change the relative position of the valve seat and the sealing ring.

[0008] Preferably, a thrust ring is installed on the valve body near the upper end wall of the bottom flange, a metal O-ring is provided between the valve seat and the valve body, and a shaft sleeve is installed on the valve body near the thrust ring and adjacent to the packing.

[0009] Preferably, a fixing pin is provided between the valve stem and the valve plate for connecting the valve stem and the valve plate.

[0010] Preferably, a graphite ring is installed on the valve body near the shaft sleeve, and an anti-static component is provided below the graphite ring on the valve body near the packing.

[0011] Preferably, the anti-static component guides static electricity generated by friction between the sealing ring and the valve seat switch, and the static electricity is conducted out through the valve body.

[0012] The utility model has at least the following beneficial effects:

[0013] 1. The metal O-ring increases the protection between the valve body and the valve seat to prevent the fire from spreading along the downstream pipeline. The anti-static component consists of a spring and a steel ball, which allows the valve stem to contact the valve body, and the valve stem is connected to the valve plate, thereby guiding the static electricity between the sealing ring and the valve seat to be discharged from the valve body.

[0014] 2. The adjusting screws at the retaining ring and semicircular ring are used to change the relative position of the sealing ring and the valve seat to perform bidirectional sealing on the valve seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

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

[0017] In the figure: 1. Positioner; 2. Pressure reducing valve; 3. Cylinder; 4. Connecting shaft; 5. Bracket; 6. Clamp; 7. Valve stem; 8. Valve body; 9. Packing plate; 10. Packing gland; 11. Packing; 12. Metal O-ring; 13. Retaining ring; 14. Semi-circular ring; 15. Adjusting screw; 16. Valve seat; 17. Pressing ring; 18. Valve plate; 19. Sealing ring; 20. Bushing; 21. Bottom flange; 22. Graphite ring; 23. Anti-static assembly; 24. Fixing pin; 25. Thrust ring. DETAILED DESCRIPTION

[0018] In order to make the purpose, 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. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] See also Figure 1 The utility model provides a technical solution for a fire-proof, anti-static and anti-blowout triple-eccentric butterfly valve:

[0020] like Figure 1 As shown, the fireproof, anti-static and anti-blowout triple-eccentric butterfly valve includes a cylinder 3, a positioner 1 provided on the cylinder 3, a pressure reducing valve 2, a bracket 5 installed under the cylinder 3, and a valve body 8 installed under the bracket 5;

[0021] A connecting shaft 4 is installed at the output end of the cylinder 3, a clamping block 6 is installed at the lower end of the connecting shaft 4, and a valve stem 7 is installed at the lower end of the clamping block 6. A packing pressure plate 9, a packing gland 10, and a packing 11 are installed from top to bottom near the bracket 5 in the valve body 8. A valve plate 18 is provided in the valve body 8. A fixing pin 24 is provided between the valve stem 7 and the valve plate 18 for connecting the valve stem 7 and the valve plate 18;

[0022] A valve seat 16 is installed on the left side of the valve body 8, and a sealing ring 19 is provided between the valve seat 16 and the valve plate 18. A retaining ring 13 and a semicircular ring 14 are sequentially provided on the left side of the valve seat 16. An adjusting screw 15 runs through the retaining ring 13 and the semicircular ring 14 to change the relative position of the valve seat 16 and the sealing ring 19. A pressing ring 17 is installed between the valve seat 16 and the valve plate 18 near the sealing ring 19. A bottom flange 21 is provided at the bottom of the valve body 8, and a thrust ring 25 is installed on the upper end wall of the valve body 8 near the bottom flange 21. A metal O-ring 12 is provided between the valve seat 16 and the valve body 8, and a shaft sleeve 20 is installed on the valve body 8 near the thrust ring 25 and near the packing 11;

[0023] A graphite ring 22 is installed near the sleeve 20 of the valve body 8, and an anti-static component 23 is provided below the graphite ring 22 near the packing 11 of the valve body 8. The anti-static component 23 guides the static electricity generated by the switching friction between the sealing ring 19 and the valve seat 16 and conducts it through the valve body 8.

[0024] Working principle:

[0025] The bottom flange 21 installs the entire structure. With the cooperation of the positioner 1, the pressure reducing valve 2, and the cylinder 3, the valve stem 7 is driven to move through the connecting shaft 4 and the clamping block 6. The bottom of the valve stem 7 is connected to the valve plate 18 through the fixing pin 24, thereby driving the valve plate 18 to move. Among them, the pressure ring 17 and the sealing ring 19 increase the sealing performance between the valve plate 18 and the valve seat 16.

[0026] The shaft sleeve 20 assists in cooperating with the movement of the valve stem 7, the packing pressure plate 9, the packing gland 10, and the packing 11 increase the sealing between the valve stem 7 and the valve body 8, and the thrust ring 25 prevents the valve stem 7 from flying out of the valve body 8 and limits the valve stem 7;

[0027] The metal O-ring 12 increases the protection between the valve body 8 and the valve seat 16 to prevent the fire from spreading along the downstream pipeline. The anti-static component 23 guides the static electricity generated by the friction between the sealing ring 19 and the valve seat 16 and conducts it away from the valve body 8.

[0028] The graphite ring 22 is used to prevent the medium from entering between the valve stem 7 and the shaft sleeve 20, and to prevent the jamming phenomenon during the switching process;

[0029] The adjusting screws 15 at the retaining ring 13 and the semicircular ring 14 rotate to drive the retaining ring 13 and the semicircular ring 14 to move, thereby pushing the valve seat 16, making the position of the valve seat 16 controllable and adjustable, and further changing the relative position of the sealing ring 19 and the valve seat 16 to perform bidirectional sealing on the entire valve.

[0030] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and improvements are possible without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed for the present invention is defined by the appended claims and their equivalents.

Claims

1. A fireproof, anti-static and anti-blowout triple-eccentric butterfly valve, comprising a cylinder (3), a positioner (1) provided on the cylinder (3), a pressure reducing valve (2), a bracket (5) installed under the cylinder (3), and a valve body (8) installed under the bracket (5), characterized in that: The output end of the cylinder (3) is provided with a connecting shaft (4), the lower end of the connecting shaft (4) is provided with a clamping block (6), the lower end of the clamping block (6) is provided with a valve stem (7), a packing pressure plate (9), a packing pressure cover (10) and a packing (11) are provided from top to bottom near the bracket (5) in the valve body (8), a valve plate (18) is provided in the valve body (8), a valve seat (16) is provided on the left side of the valve body (8), a sealing ring (19) is provided between the valve seat (16) and the valve plate (18), a retaining ring (13) and a semicircular ring (14) are provided on the left side of the valve seat (16), a pressing ring (17) is provided between the valve seat (16) and the valve plate (18) near the sealing ring (19), and a bottom flange (21) is provided at the bottom of the valve body (8).

2. The fireproof, anti-static and anti-blowout triple eccentric butterfly valve according to claim 1 is characterized in that: An adjusting screw (15) is passed through the retaining ring (13) and the semicircular ring (14) for changing the relative position of the valve seat (16) and the sealing ring (19).

3. The fireproof, anti-static and anti-blowout triple eccentric butterfly valve according to claim 1 is characterized in that: A thrust ring (25) is installed on the upper end wall of the valve body (8) near the bottom flange (21), a metal O-ring (12) is provided between the valve seat (16) and the valve body (8), and a shaft sleeve (20) is installed on the valve body (8) near the thrust ring (25) and adjacent to the packing (11).

4. The fireproof, anti-static and anti-blowout triple eccentric butterfly valve according to claim 1 is characterized in that: A fixing pin (24) is provided between the valve stem (7) and the valve plate (18) for connecting the valve stem (7) and the valve plate (18).

5. The fireproof, anti-static and anti-blowout triple eccentric butterfly valve according to claim 1 is characterized in that: A graphite ring (22) is installed on the valve body (8) near the shaft sleeve (20), and an anti-static component (23) is provided below the graphite ring (22) on the valve body (8) near the packing (11).

6. The fireproof, anti-static and anti-blowout triple eccentric butterfly valve according to claim 5 is characterized in that: The anti-static component (23) guides static electricity generated by the friction between the sealing ring (19) and the valve seat (16) during switching, and guides the static electricity out through the valve body (8).

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