Corrosion-resistant valve body of regulating valve

Abstract

The utility model discloses a corrosion-resistant valve body of a regulating valve. The corrosion-resistant valve body comprises a valve body and flange plates arranged at the two ends of the valve body. The silicon nitride coating is sprayed on the inner surface of the valve body and is used for enhancing wear resistance and corrosion resistance of the valve body so as to prolong the service life of the valve body, and the polytetrafluoroethylene coating is arranged on the silicon nitride coating. The silicon nitride coating and the polytetrafluoroethylene coating are arranged in the valve body, double-layer protection is achieved, the valve body is prevented from being corroded and damaged due to the fact that the inner wall of the valve body is scoured and corroded by media for a long time, the service life is prolonged, and use cost is reduced.

Description

Technical Field

[0001] The utility model relates to a valve body, in particular to a corrosion-resistant valve body of a regulating valve. Background Art

[0002] During the use of the existing valve body, the inner wall of the valve body is easily worn due to long-term scouring by the medium, and the phenomenon of corrosion is easily reflected due to long-term contact with the medium; at present, in order to prevent the medium from directly contacting the valve body and easily causing corrosion of the valve body, many valves spray an anti-corrosion coating on the inner wall of the valve body. However, when the medium enters the valve body, the high-speed medium directly scours the valve body. Especially for the medium with particles, the anti-corrosion coating provided on the valve body is easily worn during long-term scouring by the medium. After the wear, the medium will directly contact the valve body, resulting in the corrosion problem of the valve body. Therefore, a corrosion-resistant valve body of a regulating valve is proposed. Content of the Utility Model

[0003] The purpose of the utility model is to propose a corrosion-resistant valve body of a regulating valve to solve the above problems.

[0004] To achieve the above purpose, the utility model provides the following technical solution: a corrosion-resistant valve body of a regulating valve, including a valve body and flange plates arranged at both ends of the valve body; it is characterized in that it further includes a silicon nitride coating sprayed on the inner surface of the valve body to enhance the wear resistance and corrosion resistance of the valve body and improve the service life of the valve body, and a polytetrafluoroethylene coating arranged on the silicon nitride coating.

[0005] Further preferably, the flange plates are also sprayed with a silicon nitride coating to increase the wear resistance and corrosion resistance of the flange plates, and a polytetrafluoroethylene coating is also arranged on the silicon nitride coating.

[0006] Further preferably, it further includes a silicon nitride coating sprayed on the outer surface of the valve body.

[0007] Further preferably, it further includes a buffer structure arranged in the valve body to reduce the flow rate and impact force of the medium; the buffer structure includes a flow-attenuating cylinder detachably installed on the flange plate and a plurality of flow-attenuating fins arranged in the flow-attenuating cylinder.

[0008] Further preferably, the plurality of flow-attenuating fins are arranged alternately in the flow-attenuating cylinder to form a flow-attenuating channel.

[0009] The beneficial effects of the utility model: By arranging a silicon nitride coating and a polytetrafluoroethylene coating inside the valve body, double-layer protection is used to prevent the inner wall of the valve body from being corroded and damaged due to long-term scouring and corrosion by the medium, improve the service life, and reduce the use cost;

[0010] By providing a polytetrafluoroethylene layer, which has a self-lubricating effect, it is used to reduce the friction between the medium and the polytetrafluoroethylene layer, thereby reducing wear and extending the service life.

[0011] By providing a buffer structure, it plays a role in buffering the medium entering the valve body and reducing the impact, avoiding high-speed erosion of the inner wall of the valve body by the medium when it enters the valve body, which would exacerbate the wear of the coating on the inner wall of the valve body. Once the coating is worn, it will lead to the contact between the medium and the valve body, resulting in the phenomenon that the valve body is prone to corrosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] FIG Figure 1 is a schematic structural diagram of the present utility model;

[0013] FIG Figure 2 is a schematic enlarged sectional structural diagram of a part of the present utility model;

[0014] FIG Figure 3 is a schematic structural diagram of the flow buffer cylinder in the present utility model.

[0015] LEGEND DESCRIPTION: 1. Valve body; 2. Flange; 3. Silicon nitride coating; 4. Polytetrafluoroethylene coating; 5. Buffer structure; 51. Flow buffer cylinder; 52. Flow buffer plate; 53. Flow buffer channel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] Next, we will further describe a corrosion-resistant valve body of a regulating valve according to the present utility model with reference to the accompanying drawings.

[0017] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture as shown in the accompanying drawings. If this specific posture changes, then the directional indication will also change accordingly.

[0018] In the present utility model, unless otherwise clearly specified and defined, terms such as "connection" and "fixation" should be understood in a broad sense; for example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0019] Refer to Figures 1-3As shown in the figure, a corrosion-resistant valve body of a regulating valve includes a valve body 1 and flange plates 2 provided at both ends of the valve body 1; it is characterized in that it further includes a silicon nitride coating 3 sprayed on the inner surface of the valve body 1 for enhancing the wear resistance and corrosion resistance of the valve body 1 and improving the service life of the valve body 1, and a polytetrafluoroethylene coating 4 provided on the silicon nitride coating 3;

[0020] By providing a silicon nitride coating 3 and a polytetrafluoroethylene coating 4 inside the valve body 1, double-layer protection is used to prevent the inner wall of the valve body 1 from being corroded and damaged due to long-term erosion and corrosion by the medium, improve the service life, and reduce the use cost;

[0021] By providing the polytetrafluoroethylene layer, due to its self-lubricating function, it is used to reduce the friction between the medium and the polytetrafluoroethylene layer, thereby reducing wear and extending the service life.

[0022] In one embodiment, the flange plate 2 is also sprayed with a silicon nitride coating 3 that increases the wear resistance and corrosion resistance of the flange plate 2, and a polytetrafluoroethylene coating 4 is also provided on the silicon nitride coating 3. By providing a silicon nitride coating 3 and a polytetrafluoroethylene coating 4 on the flange plate 2, it is used to increase the wear resistance and corrosion resistance of the flange plate 2 and increase the service life.

[0023] In one embodiment, it further includes a silicon nitride coating 3 sprayed on the outer surface of the valve body 1. By providing a silicon nitride coating 3 on the outer surface of the valve body 1, it is used to increase the wear resistance and corrosion resistance of the outer surface and prevent the outer wall of the valve body 1 from being damaged due to corrosion.

[0024] In one embodiment, it further includes a buffer structure 5 provided inside the valve body 1 for reducing the flow rate and impact force of the medium; the buffer structure 5 includes a flow-attenuating cylinder 51 detachably installed on the flange plate 2 and several flow-attenuating fins 52 provided inside the flow-attenuating cylinder 51;

[0025] By providing the buffer structure 5, it plays a role in buffering and reducing the impact of the medium entering the valve body 1, and avoids the high-speed erosion of the inner wall of the valve body 1 by the medium when the medium enters the valve body 1, which will exacerbate the wear of the inner wall coating of the valve body 1. Once the coating is worn, it will cause the medium to contact the valve body 1 and lead to the phenomenon that the valve body 1 is prone to corrosion;

[0026] By detachably installing the flow-attenuating cylinder 51 on the flange plate 2, the flow-attenuating cylinder 51 can be replaced separately after being damaged by the long-term impact of the medium, without replacing the valve body 1, which improves the service life of the valve body 1 and saves costs.

[0027] In one embodiment, several flow-attenuating vanes 52 are staggeredly arranged in the flow-attenuating cylinder 51 to form a flow-attenuating channel 53. Through the setting of the flow-attenuating channel 53, it is used to slow down the flow, reduce the impact of the incoming medium, and prevent the medium from directly impacting the inner wall of the valve body 1, resulting in wear of the coating provided in the valve body 1. After the coating is worn, the valve body 1 is impacted and worn, and is corroded due to long-term contact with the medium.

[0028] When the present utility model is in use: First, one end of the flow-attenuating cylinder 51 is inserted into the valve body 1, and one end of the flow-attenuating cylinder 51 is fixedly installed on the flange 2 by means of screws or pressing. During use, the flange 2 is connected to the pipeline. Before the medium enters the valve body 1 through the pipeline, it is first blocked by the flow-attenuating vanes 52 on the flow-attenuating cylinder 51. After being blocked by multiple flow-attenuating vanes 52, the medium slowly enters the valve body 1, reducing the scouring force on the valve body 1.

[0029] The protection scope of the present utility model is not limited to the above embodiments and their variations. Conventional modifications and replacements made by those skilled in the art based on the content of this embodiment all fall within the protection scope of the present utility model.

Claims

1. A corrosion-resistant valve body of a control valve, comprising a valve body (1) and flange plates (2) provided at both ends of the valve body (1); characterized in that It also includes a silicon nitride coating (3) sprayed on the inner surface of the valve body (1) to enhance the wear resistance and corrosion resistance of the valve body (1) and thus extend the service life of the valve body (1), and a polytetrafluoroethylene coating (4) provided on the silicon nitride coating (3); it also includes a buffer structure (5) provided inside the valve body (1) to reduce the flow rate and impact force of the medium; the buffer structure (5) includes a flow retarder cylinder (51) detachably mounted on the flange (2) and a number of flow retarder vanes (52) provided inside the flow retarder cylinder (51); the number of flow retarder vanes (52) are staggered inside the flow retarder cylinder (51) to form a flow retarder channel (53).

2. The corrosion-resistant valve body of a regulating valve according to claim 1, characterized in that: The flange (2) is also sprayed with a silicon nitride coating (3) to increase the wear resistance and corrosion resistance of the flange (2), and a polytetrafluoroethylene coating (4) is also provided on the silicon nitride coating (3).

3. The corrosion-resistant valve body of a regulating valve according to claim 1, characterized in that: It also includes a silicon nitride coating (3) sprayed on the outer surface of the valve body (1).

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