High-corrosion-resistance PFA plastic lining plug valve

Abstract

The utility model provides a strong corrosion resistance PFA plastic lining plug valve relates to lining plug valve technical field, including valve body, footstock and valve stem, the upper part of valve body is equipped with footstock, the middle part of footstock is equipped with valve stem, the lower part of valve body is equipped with base, and between footstock and base is equipped with a plurality of groups of long screw, and the valve body is equipped with the valve stem. An input pipe opening is formed in the left side of the valve body, an output pipe opening is formed in the right side of the valve body, the input pipe opening and the output pipe opening are in bilateral symmetry about the center line of the valve body, a middle through hole is formed in a rotating plug, and a lower connector is arranged at the lower end of the rotating plug. The middle anti-corrosion linings and the outer reinforcing layer are arranged in the valve body, and the middle anti-corrosion linings are arranged in the input pipe opening and the output pipe opening in a sleeved mode, so that anti-corrosion and internal structural strength are enhanced, the valve is safer, anti-corrosion and durable, damage is not prone to occurring, medium leakage is avoided, the internal structure can be detached and replaced, and long-term safe use is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of lined plug valves, in particular to a highly corrosion-resistant PFA plastic lined plug valve. Background Art

[0002] In the development of modern industry, fluorine-lined valves and various pipeline accessories are widely used in various fields such as petroleum, printing and dyeing, and chemical industry. Fluorine-lined valves are specially used to control corrosive or highly corrosive media. The inner surface of the valve body is covered with various optional fluoroplastics, which are suitable for different working temperatures and fluid pipelines. They have the characteristics of high strength and good corrosion resistance. As the preferred project in the project, they have attracted great attention and favor from various engineering design units and construction units.

[0003] In the specification of the fully lined plug valve in the prior art (publication number CN202001659U), it is mentioned that "a plug is provided inside the valve body, a valve cover sealing structure is provided on the valve body, and the interior of the valve body and the outer surface of the plug are coated with a self-lubricating and damage-resistant protective lining". However, the plug valve body in the prior art is not corrosion-resistant, making it difficult to use for a long time, and may cause medium leakage, which is not safe and practical. Utility Model Content

[0004] In order to overcome the defects of the prior art, a highly corrosion-resistant PFA plastic lined plug valve is provided to solve the problem that the plug valve body in the prior art is not corrosion-resistant, making it difficult to use for a long time, may cause medium leakage, and is not safe and practical.

[0005] To achieve the above-mentioned purpose, a highly corrosion-resistant PFA plastic lined plug valve is provided, comprising a valve body, a top seat and a valve stem, wherein the top seat is installed on the upper part of the valve body, and the valve stem is installed in the middle part of the top seat, a base is installed on the lower part of the valve body, and a plurality of groups of long screws are installed between the top seat and the base, an input pipe port is arranged on the left side of the valve body, and an output pipe port is arranged on the right side of the valve body, and the input pipe port and the output pipe port are symmetrical about the center line of the valve body.

[0006] Furthermore, a left connecting flange is provided at the left end of the input pipe outlet, and a right connecting flange is provided at the right end of the output pipe outlet, and side anti-corrosion bushings are both sleeved in the left connecting flange and the output pipe outlet. The side anti-corrosion bushings are made of PFA plastic material and are a detachable structure.

[0007] Furthermore, a left through hole is provided in the left portion of the valve body, and the left through hole is connected to the input pipe port, and a right through hole is provided in the right portion of the valve body, and the right through hole is connected to the output pipe port.

[0008] Furthermore, an upper fixing plate is provided on the upper part of the top seat, upper screw holes are provided on the front and rear parts of the upper fixing plate, and an upper sealing sleeve is provided at the upper center of the top seat, the upper rod body of the valve stem is sleeved in the upper sealing sleeve, and a middle anti-corrosion bushing is provided at the lower part of the top seat, an outer reinforcement layer is provided on the outer side of the middle anti-corrosion bushing, and the middle anti-corrosion bushing is made of PFA plastic, and the outer reinforcement layer is made of stainless steel, and valve ports are provided on both sides of the lower part of the top seat, and the valve ports on both sides are respectively connected with the left through hole and the right through hole.

[0009] Furthermore, a lower sealing plate is provided on the upper part of the base, the lower sealing plate is made of PFA plastic material, and a middle connecting groove is provided at the center of the upper end surface of the lower sealing plate, and a side clamping groove is provided on the outer side of the middle connecting groove, the lower part of the top seat is embedded in the side clamping groove, and two groups of lower screw holes are provided on the left and right parts of the base.

[0010] Furthermore, the rod body of the long screw passes through the upper screw hole and the lower screw hole aligned on the same side in sequence from top to bottom, and a fastening nut is twisted at the lower end of the long screw, and the long screw is a detachable structure.

[0011] Furthermore, a rotating plug is provided at the lower part of the valve stem, and the rotating plug rotates and moves at the lower center of the top seat, and a middle through hole is opened in the rotating plug. A lower connecting head is provided at the lower end of the rotating plug, and the lower connecting head is rotatably connected in the middle connecting groove, and a turntable is provided at the upper end of the valve stem.

[0012] The beneficial effects of the utility model are:

[0013] 1. The utility model inserts side anti-corrosion bushings in both the input pipe opening and the output pipe opening to increase the anti-corrosion strength of the inner wall of the pipeline, making it safer and more durable. The side anti-corrosion bushings are easy to assemble or disassemble for regular replacement, making the plug valve more durable.

[0014] 2. The provision of the middle anti-corrosion bushing and the outer reinforcement layer in the utility model not only enhances the anti-corrosion strength inside the valve body, but also enhances the structural strength inside the valve body, making it more resistant to impact pressure, safer and more reliable to use, and less prone to deformation.

[0015] 3. The base of the utility model is provided to utilize the lower sealing plate to perform corrosion protection on the bottom of the valve body, so that the assembly between the top seat in the valve body, the valve stem and the base is more stable and firm.

[0016] 4. In the utility model, the left and right parts of the top seat and the base are locked by two sets of long screws, which not only strengthens the firmness of the top seat and the base installed on the valve body, but also allows for easy maintenance and replacement after disassembly, which is more convenient and practical.

[0017] 5. The rotary plug at the lower part of the valve stem in the utility model adopts a conical sealing plug, and the V-shaped plug forms an angle to effectively prevent medium leakage, making it more compact and reliable to use when rotating the switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view schematic diagram of an embodiment of the utility model;

[0019] Figure 2 It is a cross-sectional schematic diagram of an embodiment of the utility model;

[0020] Figure 3 It is a schematic diagram of a side anti-corrosion bushing according to an embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the top seat structure of an embodiment of the utility model;

[0022] Figure 5 This is a schematic diagram of the base structure of an embodiment of the utility model;

[0023] Figure 6 This is a schematic diagram of the valve stem structure of an embodiment of the utility model.

[0024] In the figure: 1. valve body; 10. left through hole; 11. right through hole; 12. input pipe outlet; 13. left connecting flange; 14. side anti-corrosion bushing; 15. output pipe outlet; 16. right connecting flange; 2. top seat; 20. upper sealing sleeve; 21. middle anti-corrosion bushing; 22. outer reinforcement layer; 23. valve mouth; 24. upper fixing plate; 25. upper screw hole; 3. base; 30. lower sealing plate; 31. lower screw hole; 32. side clamping groove; 33. middle connecting groove; 4. long screw; 40. fastening nut; 5. valve stem; 50. rotating plug; 51. middle through hole; 52. lower connecting head; 53. turntable. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model clearer, the utility model is further described in detail in combination with the accompanying drawings and embodiments. The specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model. Specific details such as specific system structures and technologies are proposed in order to more thoroughly understand the embodiments of the utility model. The described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. However, it should be clear to those skilled in the art that the utility model can also be implemented in other embodiments without these specific details. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present disclosure.

[0026] The specific implementation of the utility model is described in detail below with reference to the accompanying drawings.

[0027] Figure 1 It is a front view schematic diagram of an embodiment of the utility model, Figure 2 It is a cross-sectional schematic diagram of an embodiment of the utility model, Figure 3 This is a schematic diagram of the side anti-corrosion bushing of the utility model embodiment, Figure 4 This is a schematic diagram of the top seat structure of the utility model embodiment, Figure 5 The base structure diagram of the utility model embodiment and Figure 6 This is a schematic diagram of the valve stem structure of an embodiment of the utility model.

[0028] Reference Figures 1 to 6 As shown, the utility model provides a highly corrosion-resistant PFA plastic lined plug valve, comprising a valve body 1, a top seat 2 and a valve stem 5, the top seat 2 is installed on the upper part of the valve body 1, and the valve stem 5 is installed in the middle part of the top seat 2, the base 3 is installed at the lower part of the valve body 1, and a plurality of groups of long screws 4 are installed between the top seat 2 and the base 3, an input pipe port 12 is arranged on the left side of the valve body 1, and an output pipe port 15 is arranged on the right side of the valve body 1, and the input pipe port 12 and the output pipe port 15 are symmetrical about the center line of the valve body 1.

[0029] In this embodiment, a left connecting flange 13 is provided at the left end of the input pipe outlet 12, and a right connecting flange 16 is provided at the right end of the output pipe outlet 15, and a side anti-corrosion bushing 14 is sleeved in the left connecting flange 13 and the output pipe outlet 15, the side anti-corrosion bushing 14 is made of PFA plastic material, and the side anti-corrosion bushing 14 is a detachable structure; a left through hole 10 is provided in the left part of the valve body 1, and the left through hole 10 is connected to the input pipe outlet 12, and a right through hole 11 is provided in the right part of the valve body 1, and the right through hole 11 is connected to the output pipe outlet 15.

[0030] As a preferred embodiment, the utility model inserts a side anti-corrosion bushing 14 into both the input pipe port 12 and the output pipe port 15 in order to increase the anti-corrosion strength of the inner wall of the pipeline, making it safer and more durable. The side anti-corrosion bushing 14 is easy to assemble or disassemble for regular replacement, making the plug valve more durable.

[0031] In this embodiment, an upper fixing plate 24 is provided on the upper portion of the top seat 2, upper screw holes 25 are provided on the front and rear portions of the upper fixing plate 24, and an upper sealing sleeve 20 is provided at the upper center of the top seat 2, the upper rod body of the valve stem 5 is sleeved in the upper sealing sleeve 20, and a middle anti-corrosion bushing 21 is provided at the lower portion of the top seat 2, an outer reinforcement layer 22 is provided on the outer side of the middle anti-corrosion bushing 21, and the middle anti-corrosion bushing 21 is made of PFA plastic, and the outer reinforcement layer 22 is made of stainless steel, and valve ports 23 are provided on both sides of the lower portion of the top seat 2, and the valve ports 23 on both sides are respectively connected to the left through hole 10 and the right through hole 11.

[0032] As a preferred embodiment, the provision of the middle anti-corrosion sleeve 21 and the outer reinforcement layer 22 in the utility model not only enhances the anti-corrosion strength inside the valve body, but also enhances the structural strength inside the valve body, making it more resistant to impact pressure, safer and more reliable to use, and less prone to deformation.

[0033] In this embodiment, a lower sealing plate 30 is provided on the upper part of the base 3, and the lower sealing plate 30 is made of PFA plastic material. A middle connecting groove 33 is provided at the center of the upper end surface of the lower sealing plate 30, and a side groove 32 is provided on the outer side of the middle connecting groove 33. The lower part of the top seat 2 is embedded in the side groove 32, and two groups of lower screw holes 31 are provided on the left and right parts of the base 3.

[0034] As a preferred embodiment, the base 3 of the utility model is provided to utilize the lower sealing plate 30 to perform corrosion protection on the bottom of the valve body, so that the assembly between the top seat 2 in the valve body, the valve stem 5 and the base 3 is more stable and firm.

[0035] In this embodiment, the rod of the long screw 4 passes through the upper screw hole 25 and the lower screw hole 31 aligned on the same side from top to bottom, and the lower end of the long screw 4 is twisted with a fastening nut 40, and the long screw 4 is a detachable structure.

[0036] As a preferred embodiment, the left and right parts of the top seat 2 and the base 3 in the utility model are locked by two sets of long screws 4, which not only enhances the firmness of the top seat 2 and the base 3 installed on the valve body 1, but also allows for easy maintenance and replacement after disassembly, which is more convenient and practical.

[0037] In this embodiment, a rotating plug 50 is provided at the lower part of the valve stem 5, and the rotating plug 50 rotates and moves at the lower center of the top seat 2. A middle through hole 51 is opened in the rotating plug 50, and a lower connecting head 52 is provided at the lower end of the rotating plug 50, and the lower connecting head 52 is rotatably connected in the middle connecting groove 33. At the same time, a turntable 53 is provided at the upper end of the valve stem 5.

[0038] As a preferred embodiment, the rotary plug 50 at the lower part of the valve stem 5 of the utility model adopts a conical sealing plug, and the V-shaped plug forms an angle that effectively prevents medium leakage, making it more tightly and reliably used when rotating the switch.

[0039] The utility model can effectively solve the problems in the prior art that the plug valve body is not corrosion-resistant, making it difficult to use for a long time, may cause medium leakage, and is not safe and practical. The utility model arranges a middle anti-corrosion bushing and an outer reinforcement layer inside the valve body, and a middle anti-corrosion bushing is sleeved in the input and output pipe openings, which helps to strengthen the anti-corrosion and enhance the strength of the internal structure, making it safer, more corrosion-resistant and durable, not easy to be damaged, avoiding medium leakage, and the internal structure can be disassembled and replaced, which is convenient for long-term and safe use.

[0040] The above embodiments are used to explain the present invention rather than to limit the present invention. Any modifications and changes made to the present invention within the spirit of the present invention and the scope of the claims for protection shall be included in the protection scope of the present invention.

Claims

1. A highly corrosion-resistant PFA plastic lined plug valve, characterized by: The valve body (1) comprises a valve body (1), a top seat (2) and a valve stem (5); the top seat (2) is installed on the upper part of the valve body (1), and the valve stem (5) is installed in the middle part of the top seat (2); the base (3) is installed on the lower part of the valve body (1), and a plurality of groups of long screws (4) are installed between the top seat (2) and the base (3); an input pipe opening (12) is arranged on the left side of the valve body (1), and an output pipe opening (15) is arranged on the right side of the valve body (1), and the input pipe opening (12) and the output pipe opening (15) are symmetrical about the center line of the valve body (1).

2. A highly corrosion-resistant PFA plastic lined plug valve according to claim 1, characterized in that: A left connecting flange (13) is arranged at the left end of the input pipe opening (12), and a right connecting flange (16) is arranged at the right end of the output pipe opening (15), and a side anti-corrosion bushing (14) is sleeved inside the left connecting flange (13) and the output pipe opening (15), the side anti-corrosion bushing (14) is made of PFA plastic material, and the side anti-corrosion bushing (14) is a detachable structure.

3. A highly corrosion-resistant PFA plastic lined plug valve according to claim 1, characterized in that: A left through hole (10) is provided in the left portion of the valve body (1), and the left through hole (10) is communicated with the input pipe opening (12); and a right through hole (11) is provided in the right portion of the valve body (1), and the right through hole (11) is communicated with the output pipe opening (15).

4. A highly corrosion-resistant PFA plastic lined plug valve according to claim 1, characterized in that: An upper fixing plate (24) is arranged on the upper part of the top seat (2), upper screw holes (25) are arranged on the front and rear parts of the upper fixing plate (24), and an upper sealing sleeve (20) is arranged at the center of the upper part of the top seat (2), the upper rod body of the valve stem (5) is sleeved in the upper sealing sleeve (20), and a middle anti-corrosion bushing (21) is arranged on the lower part of the top seat (2), an outer reinforcement layer (22) is arranged on the outer side of the middle anti-corrosion bushing (21), and the middle anti-corrosion bushing (21) is made of PFA plastic, and the outer reinforcement layer (22) is made of stainless steel. At the same time, valve ports (23) are arranged on both left and right sides of the lower part of the top seat (2), and the valve ports (23) on both sides are respectively connected to the left through hole (10) and the right through hole (11).

5. A highly corrosion-resistant PFA plastic lined plug valve according to claim 1, characterized in that: A lower sealing plate (30) is arranged on the upper part of the base (3), the lower sealing plate (30) is made of PFA plastic material, a middle connecting groove (33) is arranged at the center of the upper end surface of the lower sealing plate (30), and a side clamping groove (32) is arranged on the outer side of the middle connecting groove (33), the lower part of the top seat (2) is embedded in the side clamping groove (32), and two groups of lower screw holes (31) are arranged on the left and right parts of the base (3).

6. A highly corrosion-resistant PFA plastic lined plug valve according to claim 1, characterized in that: The rod body of the long screw (4) passes through the upper screw hole (25) and the lower screw hole (31) aligned on the same side in sequence from top to bottom, and the lower end of the long screw (4) is twisted with a fastening nut (40), and the long screw (4) is a detachable structure.

7. A highly corrosion-resistant PFA plastic lined plug valve according to claim 1, characterized in that: A rotating plug (50) is provided at the lower part of the valve stem (5), and the rotating plug (50) is rotatably movable at the lower center of the top seat (2). A middle through hole (51) is provided in the rotating plug (50). A lower connecting head (52) is provided at the lower end of the rotating plug (50), and the lower connecting head (52) is rotatably connected in the middle connecting groove (33). At the same time, a rotating disk (53) is provided at the upper end of the valve stem (5).

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