Tank bottom valve

Abstract

The utility model discloses a tank bottom valve which comprises an actuator, a valve body, a valve rod, a valve core and a flange, the flange is provided with a first clamp which is connected with the valve body and forms clamping, the valve rod is connected with the valve core and arranged in the valve body and forms sealing fit with the flange, one side, facing the actuator, of the valve body is provided with a sleeve used for installing the valve rod, and the sleeve is sleeved with the valve rod. The actuator is provided with a second clamp connected with the sleeve in a clamping mode, the actuator and the valve rod are in linkage connection, a sealing groove is formed in the side, facing the valve body, of the flange, and an annular sealing ring is arranged in the sealing groove in an interference fit mode. One end of the valve body is arranged in the sealing groove in an inserted mode and abuts against the annular sealing ring in a sealed mode, and a sealing piece matched with the valve element in a sealed mode is arranged on the portion, located on one side of the annular sealing ring, of the valve body. And the problems of sealing failure, flanging and abrasion of the sealing ring at the butt joint of the valve body and the flange can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field related to valves, in particular to a tank bottom valve. Background Art

[0002] Tank bottom valves are used for discharging materials from reaction vessels in clean industries such as pharmaceuticals, biology, fine chemicals, and foods. The valve has the advantages of no dead angles, no residue, no leakage, and good sealing performance for discharging materials. When installing the tank bottom valve in the existing technology, the flange needs to be welded or fixed to the tank body first, and then the valve body is manually lifted to connect with the flange, and then the installation is completed by locking with a clamp. The sealing ring is usually sleeved on the outer peripheral surface of the valve body and the flange interface. The calibration accuracy is difficult to control during installation, and it will cause friction between the sealing ring and the flange structure, thereby causing flanging and wear of the sealing ring, resulting in sealing failure. Utility Model Content

[0003] In view of the above problems, the utility model provides a tank bottom valve, which can prevent the sealing ring at the joint between the valve body and the flange from sealing failure, flanging and wear.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a tank bottom valve, comprising an actuator, a valve body, a valve stem, a valve core and a flange, wherein a first clamp connected to the valve body and clamped is installed on the flange, the valve stem connecting the valve core is arranged in the valve body and forms a sealing fit with the flange, a sleeve for valve stem installation is provided on the side of the valve body facing the actuator, a second clamp formed with a clamping connection with the sleeve is provided on the actuator, the actuator and the valve stem form a linkage link, a sealing groove is provided on the side of the flange facing the valve body, an annular sealing ring is interference fit in the sealing groove, one end of the valve body is plugged into the sealing groove and forms a seal with the annular sealing ring, and a sealing member that forms a seal with the valve core is provided on one side of the annular sealing ring on the valve body.

[0005] Preferably, the valve body is provided with a positioning protrusion adapted to the sealing groove on the side facing the sealing groove, the annular sealing ring is tightly arranged on the end of the sealing groove close to the flange side, and the positioning protrusion is inserted into the sealing groove and pressed against the annular sealing ring.

[0006] Preferably, the outer diameter of the annular sealing ring is larger than the inner diameter of the reduced end of the sealing groove.

[0007] Preferably, a valve body sealing slope is provided on the inner circumferential surface of the positioning protrusion, and the valve body sealing slope is arranged in a gradually expanding state toward the side of the valve core. The valve core is located on the side of the valve body sealing slope and a corresponding valve core sealing slope is provided, and the sealing member is clamped between the valve body sealing slope and the valve core sealing slope.

[0008] Preferably, a mounting groove is provided on the valve core sealing inclined surface, one end of the sealing member is embedded in the mounting groove, and the other end of the sealing member is pressed against the valve body sealing inclined surface.

[0009] The above technical solution provided by the present invention has the following advantages compared with the existing technology: during installation, the flange is installed at the interface at the bottom of the tank body by welding, and then the annular sealing ring is interference fit at the top of the sealing groove, and finally the positioning protrusion of the valve body is slowly inserted into the sealing groove until it is installed to the specified position and tightened against the annular sealing ring, and then the first clamp is used to connect and lock the connection between the valve body and the flange to complete the installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0011] Figure 2 This is an enlarged view of part A of the present utility model;

[0012] Figure 3 This is a partial exploded view of the valve body, valve core and flange of the utility model;

[0013] Figure 4 This is another structural schematic diagram of the valve core and flange of the utility model.

[0014] In the figure: 1. actuator; 2. valve body; 3. valve stem; 4. valve core; 5. flange; 8. first clamp; 9. sleeve; 10. second clamp; 11. sealing groove; 12. annular sealing ring; 13. sealing element; 14. positioning protrusion; 15. valve body sealing slope; 16. valve core sealing slope; 17. mounting groove. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] Example: As shown in the attached Figures 1 to 4The tank bottom valve shown in the figure includes an actuator 1, a valve body 2, a valve stem 3, a valve core 4 and a flange 5. The flange 5 is provided with a first clamp 8 connected to the valve body 2 and clamped. The valve stem 3 is connected to the valve core 4 and is arranged in the valve body 2 and forms a sealing fit with the flange 5. The valve body 2 is provided with a sleeve 9 for installing the valve stem 3 on the side facing the actuator 1 (a multi-layer sealing ring is installed between the sleeve 9 and the valve body). The actuator 1 is provided with a second clamp 10 that is clamped and connected to the sleeve 9. The actuator 1 and the valve stem 3 form a linkage link. The flange 5 is provided with a sealing groove 11 on the side facing the valve body 2. A ring is provided in the sealing groove 11 for interference fit. shaped sealing ring 12, one end of the valve body 2 is inserted into the sealing groove 11 and forms a seal with the annular sealing ring 12. A sealing member 13 (specifically rubber, EPDM or fluorine material) is provided on the valve body 2 on one side of the annular sealing ring 12 to form a seal with the valve core 4. When assembling, the flange 5 is installed at the interface at the bottom of the tank body by welding, and then the annular sealing ring 12 is interference fit at the top of the sealing groove 11. Finally, the positioning protrusion 14 of the valve body 2 is slowly inserted into the sealing groove 11 until it is installed to the specified position and presses against the annular sealing ring 12. The first clamp 8 is then used to connect and lock the connection between the valve body 2 and the flange 5 to complete the installation.

[0017] As attached Figure 3 As shown, the valve body 2 is provided with a positioning protrusion 14 (an integrated structure) adapted to the sealing groove 11 on the side facing the sealing groove 11, and the annular sealing ring 12 is tightly arranged at the end of the sealing groove 11 close to the flange 5 (the outer diameter of the annular sealing ring is 0.5 mm larger than the inner diameter of the sealing groove). The positioning protrusion 14 is inserted into the sealing groove 11 and pressed against the annular sealing ring 12, so that the annular sealing ring 12 and the sealing groove 11 can achieve interference fit, which can prevent the annular sealing ring 12 from falling off after installation is completed.

[0018] As attached Figure 3 As shown, the outer diameter of the annular sealing ring 12 is larger than the inner diameter of the reduced end of the sealing groove 11 , so as to achieve an interference fit between the annular sealing ring 12 and the sealing groove 11 .

[0019] As attached Figure 3 As shown, a valve body sealing slope 15 is provided on the inner circumferential surface of the positioning protrusion 14, and the valve body sealing slope 15 is provided in a gradually expanding state toward the side of the valve core 4. The valve core 4 is located on the side of the valve body sealing slope 15 and is provided with a corresponding valve core sealing slope 16. The seal 13 is clamped between the valve body sealing slope 15 and the valve core sealing slope 16, increasing the sealing area between the seal 13 and the valve body sealing slope 15, providing better sealing performance, and at the same time providing a faster opening and closing response, and the overall opening and closing stroke is shorter.

[0020] As attached Figure 3 As shown, a mounting groove 17 is provided on the valve core sealing inclined surface 16, and one end of the seal 13 is embedded in the mounting groove 17, and the other end of the seal 13 is tightly pressed against the valve body sealing inclined surface 15. The mounting groove 17 is used to fix one end of the seal 13 to play a supporting role and prevent the seal 13 from falling off.

[0021] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are merely relational words determined for the convenience of describing the structural relationships of the various parts or elements of the present invention, and do not specifically refer to any part or element in the present invention, and cannot be understood as a limitation on the present invention.

Claims

1. A tank bottom valve, characterized in that: The invention comprises an actuator (1), a valve body (2), a valve stem (3), a valve core (4) and a flange (5), wherein a first clamp (8) connected to the valve body (2) and clamped is installed on the flange (5), the valve stem (3) is connected to the valve core (4) and is arranged in the valve body (2) and forms a sealing fit with the flange (5), the valve body (2) is provided with a sleeve (9) for installing the valve stem (3) on the side facing the actuator (1), and the actuator (1) is provided with a second clamp (8) which is clamped and connected to the sleeve (9). The hoop (10) is provided, the actuator (1) and the valve stem (3) form a linkage link, the flange (5) is provided with a sealing groove (11) on the side facing the valve body (2), an annular sealing ring (12) is provided in the sealing groove (11) with an interference fit, one end of the valve body (2) is inserted into the sealing groove (11) and forms a seal with the annular sealing ring (12), and a sealing member (13) is provided on the valve body (2) on one side of the annular sealing ring (12) to form a seal with the valve core (4).

2. The tank bottom valve according to claim 1, characterized in that: The valve body (2) is provided with a positioning protrusion (14) adapted to the sealing groove (11) on the side facing the sealing groove (11); the annular sealing ring (12) is tightly arranged at the end of the sealing groove (11) close to the flange (5); the positioning protrusion (14) is inserted into the sealing groove (11) and tightly pressed against the annular sealing ring (12).

3. The tank bottom valve according to claim 2, characterized in that: The outer diameter of the annular sealing ring (12) is larger than the inner diameter of the reduced end of the sealing groove (11).

4. The tank bottom valve according to claim 3, characterized in that: A valve body sealing bevel (15) is provided on the inner peripheral surface of the positioning protrusion (14), and the valve body sealing bevel (15) is provided in a gradually expanding state toward the side of the valve core (4). The valve core (4) is provided with a corresponding valve core sealing bevel (16) on the side of the valve body sealing bevel (15), and the sealing member (13) is clamped between the valve body sealing bevel (15) and the valve core sealing bevel (16).

5. The tank bottom valve according to claim 4, characterized in that: The valve core sealing inclined surface (16) is provided with a mounting groove (17), one end of the sealing member (13) is embedded in the mounting groove (17), and the other end of the sealing member (13) is tightly pressed against the valve body sealing inclined surface (15).

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