High-sealing corrosion-resistant stop valve

Abstract

A corrosion-resistant sleeve is arranged on the portion, penetrating into a valve body, of a valve rod, a valve element connecting portion is arranged at the bottom of the valve rod, the valve element connecting portion comprises a first limiting table and a second limiting table, the first limiting table and the second limiting table are respectively coated with a corrosion-resistant film, and a valve element comprises an upper body and a lower body. The valve rod is sleeved with the upper body, the upper end of the interior of the upper body abuts against the top of the first limiting table, the bottom of the upper body abuts against the top of the second limiting table, first seals are arranged at the connecting positions of the upper body and the first limiting table and the connecting positions of the upper body and the second limiting table respectively, and the lower body is fixed to the bottom of the upper body and wraps the second limiting table between the upper body and the lower body. According to the anti-corrosion valve rod, anti-corrosion treatment is carried out on the valve rod body and the connecting position of the valve rod and the valve element, the valve rod can be prevented from being corroded, and therefore the service life of the whole valve is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a high sealing corrosion -resistant stop valve. BACKGROUND

[0002] The stop valve for conveying strong corrosive medium generally needs to be anticorrosion treated, and the anticorrosion treatment is generally to set corrosion -resistant coating or corrosion -resistant bushing in the valve body; But since the valve stem needs to be connected with the valve core, the connection part of the valve stem and the valve core is difficult to be anticorrosion treated, and even if the corrosion -resistant coating is brushed on the connection part, the part is also easy to produce gap and lead to the corrosion of the valve stem end inside the valve core. SUMMARY

[0003] The utility model aims at overcoming the insufficient of prior art, provide a high sealing corrosion -resistant stop valve to the valve stem and the connection part of the valve stem and the valve core are specially anticorrosion treated.

[0004] The technical scheme of the utility model is: a high sealing corrosion -resistant stop valve, including the valve body, be equipped with the valve stem, the valve core and the valve seat in the valve body, the valve body is coated with corrosion -resistant layer, the part of the valve stem is equipped with corrosion -resistant sleeve and is inserted into the valve body, the bottom of the valve stem is the valve core connecting portion, the valve core connecting portion includes first limit platform and second limit platform, the outer diameter of the first limit platform is less than the outer diameter of the second limit platform, and the first limit platform and the second limit platform are respectively coated with corrosion -resistant film.

[0005] The valve core includes upper body and lower body, the upper body is sleeved on the valve stem and the inner upper end is in abutment with the top of the first limit platform, the bottom of the upper body is in abututment with the top of the second limit platform, the connection part of the upper body and the first limit platform, the second limit platform is also respectively equipped with first seal, and the lower body is fixed at the bottom of the upper body and the second limit platform is coated between the upper body and the lower body, and the connection part of the lower body and the upper body is equipped with second seal.

[0006] Further, the valve body is provided with a mounting hole corresponding to the valve seat, and the valve seat is fixed in the mounting hole.

[0007] Specifically, the lower end of the lower body is in the form of a truncated cone, and the bottom of the lower end is in the form of a cone.

[0008] Further, the lower end of the lower body and the inner periphery of the top end of the valve seat are respectively provided with corresponding fourth seals.

[0009] Further, the connection part of the upper body and the corrosion -resistant sleeve is also provided with the fifth seal.

[0010] Further, the lower end of the upper body is inserted into the upper end of the lower body, and the lower end of the upper body and the upper end of the lower body are respectively provided with corresponding positioning grooves and positioning platforms.

[0011] Further, the valve body is composed of an upper cover, a main body, a left body and a right body.

[0012] Further, the left body and the right body are respectively screwed at two ends of the main body, and the connection portions of the left body, the right body and the main body are further provided with a sixth seal.

[0013] The utility model discloses the beneficial effect is: the utility model discloses the anticorrosive treatment to valve stem itself and the connecting portion of valve stem and valve core can avoid the corrosion of valve stem, and further improve the service life of valve whole. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structure schematic diagram of the utility model;

[0015] Figure 2 It is the structure schematic diagram of valve stem, valve core and valve seat in the utility model;

[0016] Figure 3 It is the structure schematic diagram of lower body in the utility model.

[0017] In the drawing: valve stem 1, valve core 2, valve seat 3, corrosion -resistant cover 4, first limit platform 5, second limit platform 6, upper body 7, lower body 8, first seal 9, second seal 10, third seal 11, fourth seal 12, fifth seal 13, positioning platform 14, upper cover 15, main body 16, left body 17, right body 18, sixth seal 19. DETAILED DESCRIPTION

[0018] The technical scheme of the utility model will be further specifically explained below by examples and in conjunction with the drawings.

[0019] In conjunction with Figures 1-3 As shown in the figure, a kind of high sealing corrosion-resistant stop valve, including valve body, the valve body is equipped with valve stem 1, valve core 2 and valve seat 3;

[0020] The valve body is coated with a corrosion-resistant layer, the portion of the valve stem 1 inserted into the valve body is provided with a corrosion-resistant sleeve 4, the bottom of the valve stem 1 is a valve core connecting portion, the valve core connecting portion includes a first limit platform 5 and a second limit platform 6, the outer diameter of the first limit platform 5 is smaller than the outer diameter of the second limit platform 6, and the first limit platform 5 and the second limit platform 6 are respectively coated with a corrosion-resistant film.

[0021] The valve core 2 comprises an upper body 7 and a lower body 8, the upper body 7 is sleeved on the valve stem 1 and the inner upper end thereof abuts against the top of the first limiting table 5, the bottom of the upper body 7 abuts against the top of the second limiting table 6, and the connecting part of the upper body 7 and the first limiting table 5 and the second limiting table 6 is respectively provided with a first seal 9, and the lower body 8 is fixed on the bottom of the upper body 7 and covers the second limiting table 6 between the upper body 7 and the lower body 8, and the connecting part of the lower body 8 and the upper body 7 is provided with a second seal 10.

[0022] The above structure carries out corrosion prevention treatment on the valve stem 1 itself and the connecting part of the valve stem 1 and the valve core 2, so that the valve stem 1 is prevented from being corroded, and the service life of the whole valve is improved; the valve core 2 is designed in a split type and is replaceable together with the valve seat 3, so that the valve core 2 and the valve seat 3 are replaced regularly to avoid the aging of the valve core 2 and the valve seat 3 leading to the failure of sealing.

[0023] In another embodiment, as shown in Figure 1 , the valve body is provided with a mounting hole corresponding to the valve seat 3, the valve seat 3 is fixed in the mounting hole, and the connecting part of the valve seat 3 and the mounting hole is further provided with a third seal 11, so that the valve seat 3 is more easily installed, and the detachable valve seat 3 can improve the service life of the whole valve body.

[0024] In another embodiment, as shown in Figure 1 and Figure 2 , the lower end of the lower body 8 is in the shape of a truncated cone, and the bottom of the lower end is in the shape of a cone, so as to match the valve seat 3.

[0025] In another embodiment, as shown in Figure 2 , the outer periphery of the lower end of the lower body 8 and the inner periphery of the top end of the valve seat 3 are respectively provided with corresponding fourth seals 12, so as to ensure the sealing performance of the valve core 2 and the valve seat 3 after being matched.

[0026] In another embodiment, as shown in Figure 2 , the connecting part of the upper body 7 and the corrosion-resistant sleeve 4 is further provided with a fifth seal 13, so as to further ensure the sealing performance of the lower end of the valve stem 1.

[0027] In another embodiment, as shown in Figures 1-3 , the lower end of the upper body 7 is inserted into the upper end of the lower body 8, and the lower end of the upper body 7 and the upper end of the lower body 8 are respectively provided with corresponding positioning grooves and positioning tables 14, and the lower end of the upper body 7 and the upper end of the lower body 8 are fixed by a fixing screw, so that the fixing is firm and reliable, and relative rotation between the upper body 7 and the lower body 8 is avoided.

[0028] In another embodiment, as shown in Figure 1 , the valve body is composed of an upper cover 15, a main body 16, a left body 17 and a right body 18, so as to facilitate the processing of the corrosion-resistant layer inside the valve body and the assembly of the internal components of the valve body.

[0029] In another embodiment, as shown in Figure 1 The left body 17 and the right body 18 are respectively screwed at two ends of the main body 16, and a sixth seal 19 is arranged at the connection between the left body 17, the right body 18 and the main body 16 to ensure the sealing of the connection between the left body 17, the right body 18 and the main body 16.

Claims

1. A high-sealing, corrosion-resistant gate valve, comprising a valve body, wherein the valve body is provided with a valve stem (1), a valve core (2), and a valve seat (3), and the valve body is coated with a corrosion-resistant layer, characterized in that, The valve stem (1) is provided with a corrosion-resistant sleeve (4) in the part that penetrates into the valve body. The bottom of the valve stem (1) is a valve core connection part. The valve core connection part includes a first limiting platform (5) and a second limiting platform (6). The outer diameter of the first limiting platform (5) is smaller than the outer diameter of the second limiting platform (6). The first limiting platform (5) and the second limiting platform (6) are respectively covered with a corrosion-resistant film. The valve core (2) includes an upper body (7) and a lower body (8). The upper body (7) is sleeved on the valve stem (1) and its upper end abuts against the top of the first limiting platform (5). The bottom of the upper body (7) abuts against the top of the second limiting platform (6). The connection between the upper body (7) and the first limiting platform (5) and the second limiting platform (6) is provided with a first seal (9). The lower body (8) is fixed to the bottom of the upper body (7) and covers the second limiting platform (6) between the upper body (7) and the lower body (8). The connection between the lower body (8) and the upper body (7) is provided with a second seal (10).

2. The high-sealing, corrosion-resistant gate valve as described in claim 1, characterized in that, The valve body is provided with a mounting hole corresponding to the valve seat (3), the valve seat (3) is fixed in the mounting hole, and a third seal (11) is provided at the connection between the valve seat (3) and the mounting hole.

3. The high-sealing, corrosion-resistant gate valve as described in claim 2, characterized in that, The lower end of the lower body (8) is frustum-shaped, and the bottom of the lower end is conical.

4. The high-sealing, corrosion-resistant gate valve as described in claim 3, characterized in that, The lower outer periphery of the lower body (8) and the inner periphery of the top of the valve seat (3) are respectively provided with corresponding fourth seals (12).

5. The high-sealing, corrosion-resistant gate valve as described in claim 4, characterized in that, A fifth seal (13) is also provided at the connection between the upper body (7) and the corrosion-resistant sleeve (4).

6. The high-sealing, corrosion-resistant gate valve as described in claim 5, characterized in that, The lower end of the upper body (7) is inserted into the upper end of the lower body (8). The lower end of the upper body (7) and the upper end of the lower body (8) are respectively provided with corresponding positioning grooves and positioning platforms (14). The lower end of the upper body (7) and the upper end of the lower body (8) are fixed together by fixing screws.

7. The high-sealing, corrosion-resistant gate valve as described in claim 6, characterized in that, The valve body consists of an upper cover (15), a main body (16), a left body (17), and a right body (18).

8. The high-sealing, corrosion-resistant gate valve as described in claim 7, characterized in that, The left body (17) and the right body (18) are screwed to both ends of the main body (16), and a sixth seal (19) is provided at the connection between the left body (17), the right body (18) and the main body (16).

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