Surfactant butterfly valve with multiple sealing structures

Abstract

The utility model relates to the field of surface active agent production, and discloses a surface active agent butterfly valve with a multi-sealing structure, which comprises a valve body and an upper bearing, a valve rod is arranged in the valve body, a thread sealing seat is arranged at the top of the valve body, the valve rod extends upwards and is sleeved in the thread sealing seat, and the upper bearing is arranged on the valve rod. A threaded rod is machined on the portion, in the threaded sealing seat, of the valve rod in a sleeved mode, a rotating handle is installed at the top end of the threaded rod, and outer sealing structures are arranged on the two sides of the threaded rod. According to the surfactant butterfly valve with the multiple sealing structures, the fixing frame, the ring sleeve and the spring rod are used in cooperation, so that the screw rod can have a certain moving space when being extruded, it is ensured that the ring sleeve can be tightly attached to the screw rod through the springback effect of the spring rod after screwing is completed, the sealing effect is further improved, and the service life of the butterfly valve is prolonged. The problem of leakage possibly existing between the threaded sealing seat and the screw rod is effectively prevented, and the problem that the safety is insufficient when the surfactant passes through the butterfly valve is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of surfactant production, in particular to a butterfly valve for surfactants with a multi - seal structure. Background Technique

[0002] Surfactants are a class of chemicals widely used in industry and daily life. During their production process, the flow rates of various reactants and products need to be strictly controlled. The butterfly valve controls the fluid flow by rotating the valve stem to open or close the valve plate.

[0003] Currently, the existing butterfly valves for surfactants on the market generally have poor external sealing effect of the valve stem. Since the valve stem needs to rotate frequently during operation, its external sealing structure is prone to wear and aging, resulting in seal failure. Seal failure will cause leakage problems, not only causing waste of surfactants, but also possibly leading to pollution of the production environment and damage to equipment. In addition, poor sealing will also affect the operation flexibility of the butterfly valve, increase the operation difficulty, and reduce the production efficiency.

[0004] Therefore, there is an urgent need for a butterfly valve with a multi - seal structure to solve the above - mentioned technical defects. Content of the Utility Model

[0005] The purpose of the utility model is to provide a butterfly valve for surfactants with a multi - seal structure to solve the problem of leakage caused by seal failure mentioned in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A butterfly valve for surfactants with a multi - seal structure includes a valve body and an upper bearing. A valve stem is arranged inside the valve body. A threaded seal seat is installed at the top of the valve body. The valve stem extends upward and is sleeved inside the threaded seal seat. A screw rod is processed on the sleeved part of the valve stem inside the threaded seal seat. A turning handle is installed at the top of the screw rod. Outer seal structures are arranged on both sides of the screw rod; The outer seal structure includes two fixed frames respectively arranged on both sides of the screw rod. An activity groove is opened inside the fixed frame. A spring rod is movably sleeved inside the activity groove. A limit nut is installed between the spring rod and the activity groove. One end of the spring rod is inserted into a collar. An activity cavity is opened inside the collar. The spring rod is embedded and movable inside the activity cavity. The collar abuts against the screw rod.

[0007] Preferably, a lower bearing is installed outside the valve body at the bottom end of the valve stem, and a base is arranged at the bottom end of the valve body.

[0008] Preferably, the collar is composed of two semi - circular sleeves made of hard rubber, and the two collars surround the outside of the screw rod.

[0009] Preferably, one end of the valve stem is fixedly connected to a valve plate, an outer ring of the valve plate is fixedly connected to a flange ring, and inner sealing structures are arranged on both sides of the flange ring; the inner sealing structure includes a retaining edge machined on the inner wall of the valve body, a set of retaining blocks are welded on each of the left and right sides of the retaining edge, top blocks are respectively welded on both sides of the valve plate, and the top blocks are fitted and abutted against the retaining blocks.

[0010] Preferably, the cross section of the retaining block is "Z"-shaped.

[0011] Preferably, mounting bolts are fixedly connected between the valve stem and the valve plate, and fixing screws are fixedly connected between the valve plate and the flange ring.

[0012] Preferably, a thick wall is arranged on the inner wall of the valve body, and the thick wall is machined on the inner wall between the input and output ports.

[0013] Preferably, the valve plate is a circular plate-shaped member made of ceramic material.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: The butterfly valve for surfactants with a multiple sealing structure not only prevents possible leakage problems between the threaded sealing seat and the screw rod, further improves the sealing performance of the internal flow channel, but also facilitates the disassembly and replacement of parts during the overhaul of the butterfly valve;

[0015] (1) By providing an outer sealing structure using a fixing frame, a collar, a spring rod, and a screw rod, and the cooperation of the collar and the spring rod, the screw rod can have a certain moving space when being squeezed. Through the rebounding action of the spring rod, it is ensured that after the screwing is completed, the collar can closely adhere to the screw rod, further improving the sealing effect, effectively preventing possible leakage problems between the threaded sealing seat and the screw rod, and ensuring the safety of the surfactant when passing through the butterfly valve;

[0016] (2) By providing a flange ring, a retaining edge, retaining blocks, and top blocks, through the abutment of the flange ring and the retaining edge, the double abutment of the retaining blocks and the top blocks is increased, further improving the sealing performance of the internal flow channel. The surfactant will not leak in the closed state. When the butterfly valve is opened, the valve plate rotates counterclockwise, and the retaining blocks and the top blocks gradually separate, and the flow rate can gradually increase with the increase of the opening angle, and the flow rate controllability is high;

[0017] (3) By providing a valve plate, a flange ring, fixing screws, and mounting bolts, the valve plate is made of ceramic material, reducing the adhesion of impurities and ensuring the purity of the surfactant. The outer ring of the valve plate is a flange ring made of metal material. The valve plate and the flange ring are fixed by fixing screws, and the valve stem is fixed to the valve plate by mounting bolts, facilitating the disassembly and replacement of parts during the overhaul of the butterfly valve and reducing the cost required for overall maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1Front view sectional structure diagram of the present utility model;

[0019] Figure 2 Top view structure diagram of the flange ring of the present utility model;

[0020] Figure 3 Enlarged front view structure diagram of the spring rod of the present utility model;

[0021] Figure 4 Front view structure diagram of the valve plate of the present utility model.

[0022] In the figure: 1, throttle grip; 2, threaded seal seat; 3, upper bearing; 4, valve body; 5, stop block; 6, stop edge; 7, flange ring; 8, base; 9, lower bearing; 10, valve plate; 11, fixing screw; 12, top block; 13, mounting bolt; 14, valve stem; 15, fixing bracket; 16, screw; 17, thick wall; 18, limit nut; 19, movable groove; 20, movable cavity; 21, collar; 22, spring rod. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment 1: Please refer to Figures 1-4 , a butterfly valve for surfactants with a multiple sealing structure, including a valve body 4 and an upper bearing 3. A valve stem 14 is arranged inside the valve body 4. A threaded seal seat 2 is installed at the top of the valve body 4. The valve stem 14 extends upward and is sleeved inside the threaded seal seat 2. A screw 16 is processed on the sleeved part of the valve stem 14 inside the threaded seal seat 2. A throttle grip 1 is installed at the top of the screw 16. Outer sealing structures are arranged on both sides of the screw 16; the outer sealing structures include two groups of fixing brackets 15 respectively arranged on both sides of the screw 16. Movable grooves 19 are opened inside the fixing brackets 15. Spring rods 22 are movably sleeved inside the movable grooves 19. Limit nuts 18 are installed between the spring rods 22 and the movable grooves 19. One end of the spring rod 22 is inserted into a collar 21. A movable cavity 20 is opened inside the collar 21. The spring rod 22 is embedded and movable inside the movable cavity 20. The collar 21 abuts against the screw 16. The bottom end of the valve stem 14 is installed with a lower bearing 9 outside the valve body 4. A base 8 is arranged at the bottom end of the valve body 4. The collar 21 is two semi-circular sleeves made of hard rubber. The two groups of collars 21 surround the outside of the screw 16;

[0025] Specifically, as shown in Figure 1 , Figure 2 and Figure 3As shown in the figure, the butterfly valve is provided with an external sealing structure on both sides of the screw rod 16. When turning the handle 1, since a screwing force will be generated on the screw rod 16, two semi-circular ring sleeves 21 are provided and combined to wrap around the outside of the screw rod 16. When the screw rod 16 is subjected to an unstable squeezing and rotating force, it will drive the ring sleeve 21 to expand out a slight distance, which can effectively prevent the sealing failure problem caused by the screwing force.

[0026] Embodiment 2: One end of the valve stem 14 is fixedly connected to a valve plate 10, and a flange ring 7 is fixedly connected to the outer circle of the valve plate 10. Inner sealing structures are provided on both sides of the flange ring 7; the inner sealing structure includes a stop edge 6 machined on the inner wall of the valve body 4, and a set of stop blocks 5 are welded on each of the left and right sides of the stop edge 6. Top blocks 12 are respectively welded on both sides of the valve plate 10, and the top blocks 12 are fitted and abutted against the stop blocks 5. The cross-section of the stop block 5 is "Z"-shaped;

[0027] Specifically, as Figure 1 、 Figure 2 and Figure 4 shown, when the butterfly valve is closed, the flange ring 7 abuts against the stop edge 6. By increasing the abutment of the stop block 5 and the top block 12, and through the abutment of the flange ring 7 and the stop edge 6, the double abutment of the stop block 5 and the top block 12 is increased, further improving the sealing performance of the internal flow channel, and the surfactant will not leak in the closed state.

[0028] Embodiment 3: An installation bolt 13 is fixedly connected between the valve stem 14 and the valve plate 10, a fixing screw 11 is fixedly connected between the valve plate 10 and the flange ring 7, and a thick wall 17 is provided on the inner wall of the valve body 4. The thick wall 17 is machined on the inner wall between the input and output ports. The valve plate 10 is a circular plate-shaped member made of ceramic material;

[0029] Specifically, as Figure 1 and Figure 4 shown, the valve plate 10 is made of ceramic material, reducing the adhesion of impurities and ensuring the purity of the surfactant. The outer circle of the valve plate 10 is a flange ring 7 made of metal material. The valve plate 10 and the flange ring 7 are fixed by fixing screws 11, and the valve stem 14 is fixed to the valve plate 10 by installation bolts 13.

[0030] Working principle: The surfactant enters from the inlet of the valve body 4. When the butterfly valve is closed, the flange ring 7 abuts against the stop edge 6. By increasing the abutment between the stop block 5 and the top block 12, and through the abutment between the flange ring 7 and the stop edge 6, the double abutment between the stop block 5 and the top block 12 is increased, further improving the sealing performance of the internal flow channel. In the closed state, the surfactant will not leak. When the butterfly valve is opened, the valve plate 10 rotates counterclockwise, and the stop block 5 and the top block 12 gradually separate, and the flow rate can gradually increase as the opening angle increases. The butterfly valve is provided with an external sealing structure on both sides of the screw 16. When turning the handle 1, since a screwing force will be generated on the screw 16, two semi-circular ring sleeves 21 are provided and combined to cover the outside of the screw 16. When the screw 16 is subjected to an unstable extrusion and rotational force, it will drive the ring sleeve 21 to expand out a slight distance, which can effectively prevent the sealing failure problem caused by the screwing force. The combined use of the ring sleeve 21 and the spring rod 22 enables the screw 16 to have a certain moving space when being extruded. Through the rebounding action of the spring rod 22, it is ensured that after the screwing is completed, the ring sleeve 21 can closely adhere to the screw 16, further improving the sealing effect and effectively preventing the possible leakage problem between the threaded seal seat 2 and the screw 16.

[0031] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A butterfly valve for surfactants with a multiple sealing structure, comprising a valve body (4) and an upper bearing (3), characterized in that: A valve stem (14) is arranged in the valve body (4), a threaded sealing seat (2) is installed on the top of the valve body (4), the valve stem (14) extends upward and is sleeved in the threaded sealing seat (2), a screw (16) is processed on the sleeved part of the valve stem (14) in the threaded sealing seat (2), a turning handle (1) is installed on the top of the screw (16), and external sealing structures are arranged on both sides of the screw (16); The outer sealing structure comprises two groups of fixing frames (15) respectively arranged on both sides of the screw rod (16), wherein a movable groove (19) is provided in the fixing frame (15), a spring rod (22) is movably sleeved in the movable groove (19), a limiting nut (18) is installed between the spring rod (22) and the movable groove (19), one end of the spring rod (22) is inserted into a ring sleeve (21), a movable cavity (20) is provided in the ring sleeve (21), the spring rod (22) is embedded in the movable cavity (20) and moves, and the ring sleeve (21) is in contact with the screw rod (16).

2. A butterfly valve for surfactants with a multiple sealing structure according to claim 1, characterized in that: A lower bearing (9) is installed at the bottom end of the valve stem (14) outside the valve body (4), and a base (8) is provided at the bottom end of the valve body (4).

3. The butterfly valve for surfactant with a multiple sealing structure according to claim 1, characterized in that: The ring sleeves (21) are two groups of semi-arc sleeves made of hard rubber, and the two groups of ring sleeves (21) surround the outside of the screw rod (16).

4. The butterfly valve for surfactant with a multiple sealing structure according to claim 1, characterized in that: One end of the valve stem (14) is fixedly connected to a valve plate (10), and the outer ring of the valve plate (10) is fixedly connected to a flange ring (7), and inner sealing structures are arranged on both sides of the flange ring (7); the inner sealing structure includes a retaining edge (6) processed on the inner wall of the valve body (4), and a group of retaining blocks (5) are welded on the left and right sides of the retaining edge (6), and top blocks (12) are respectively welded on both sides of the valve plate (10), and the top blocks (12) are engaged and abutted with the stop blocks (5).

5. The butterfly valve for surfactant with a multiple sealing structure according to claim 4, characterized in that: The cross section of the stopper (5) is in a "Z" shape.

6. The butterfly valve for surfactant with a multiple sealing structure according to claim 4, characterized in that: A mounting bolt (13) is fixedly connected between the valve stem (14) and the valve plate (10), and a fixing screw (11) is fixedly connected between the valve plate (10) and the flange ring (7).

7. The butterfly valve for surfactant with a multiple sealing structure according to claim 1, characterized in that: The inner wall of the valve body (4) is provided with a thick wall (17), and the thick wall (17) is processed on the inner wall between the input port and the output port.

8. The butterfly valve for surfactant with a multiple sealing structure according to claim 4, characterized in that: The valve plate (10) is a circular plate-shaped component made of ceramic material.

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