High-precision corrosion-resistant valve casting

Abstract

The utility model relates to a high-precision corrosion-resistant valve casting, which belongs to the field of high-precision valve castings and comprises a valve casting main body, flanges are fixedly communicated with the left side and the right side of the valve casting main body, a filtering mechanism is arranged in the flange on the left side, and a protection component is arranged in the valve casting main body. According to the high-precision corrosion-resistant valve casting, the left and right filtering frames are attached to the left and right flanges correspondingly, left and right rotating rods drive left and right pressing blocks to rotate, the left and right filtering frames are tightly attached to the left and right flanges, and left and right filtering nets are installed; according to the high-precision corrosion-resistant valve casting, impurities in a solution can be filtered through the filter screens on the left side and the right side, the situation that the impurities make contact with the inner wall of the valve casting body to damage the valve casting body is avoided, and through the composition of all materials in the protection assembly, the high-precision corrosion-resistant valve casting has the good heat insulation performance and meanwhile has the corrosion-resistant performance, the heat-resistant performance, the self-lubricating performance and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of high-precision valve castings, in particular to a high-precision corrosion-resistant valve casting. Background Art

[0002] High-precision valves are pipeline accessories used to open and close pipelines, control flow direction, and adjust and control the parameters of the conveying medium. According to their functions, they can be divided into shut-off valves, check valves and regulating valves. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media.

[0003] For example, Chinese patent CN 215172585 U discloses a corrosion-resistant valve casting for industrial pipelines, which includes a shell mechanism, and a first protection mechanism is sleeved at the lower end of the shell mechanism.

[0004] The above-mentioned corrosion-resistant valve casting for industrial pipelines still has certain shortcomings. It has a good anti-corrosion effect through the anti-corrosion coating and the epoxy resin layer, which can better prevent the internal corrosion of the first shell and the second shell. At the same time, the first protective cylinder, the second protective cylinder and the third protective cylinder prevent water from spilling onto the first shell and the second shell to cause external corrosion, effectively realizing the stronger corrosion resistance of the outer shell in the existing valve casting, which can better prevent the outer shell from corrosion and extend the service life of the valve casting. However, when the valve is connected to the external pipeline to transport liquid, there may be impurities inside the liquid. When the impurities and the liquid enter the valve, the impurities contact the inner wall of the valve and may damage the valve, thereby reducing its practicality. Therefore, the present application proposes a high-precision corrosion-resistant valve casting to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a high-precision corrosion-resistant valve casting, which has the advantage of effectively filtering impurities and solves the problem that the valve may be damaged by the contact between impurities and the inner wall of the valve.

[0006] To achieve the above object, the utility model provides the following technical solutions: a high-precision corrosion-resistant valve casting, comprising a valve casting body, the left and right sides of the valve casting body are fixedly connected with flanges, a filtering mechanism is provided inside the left flange, and a protective component is provided inside the valve casting body;

[0007] The filtering mechanism comprises a filtering frame movably attached to the left side of the left flange, a filtering screen is fixed inside the filtering frame, three rotating rods are threadedly connected to the right side wall of the inner cavity of the left flange, and pressure blocks are fixed on the outer sides of the three rotating rods;

[0008] The protective component includes an oxide layer sprayed on the inner wall of the inner cavity of the valve casting body, a corrosion-resistant layer is sprayed on the outer side of the oxide layer, an anti-corrosion layer is sprayed on the outer side of the corrosion-resistant layer, and a waterproof layer is sprayed on the outer side of the anti-corrosion layer.

[0009] Furthermore, a valve stem seat is installed at the top of the valve casting body, and sealing rings are fixed on the opposite sides of the two flanges.

[0010] Furthermore, the filtering mechanism also includes three protruding rods fixed on the left side of the filtering frame, and the three pressing blocks are movably fitted on the left side of the filtering frame.

[0011] Furthermore, three semicircular grooves extending to the right side of the filter frame are provided on the left side thereof, and the three rotating rods are respectively located inside the three semicircular grooves.

[0012] Furthermore, the number of the filtering mechanisms is two, and the filtering mechanism on the right side is installed inside the right side flange.

[0013] Furthermore, the oxide layer is a chromium aluminum nitride coating, and the corrosion-resistant layer is an epoxy resin coating.

[0014] Furthermore, the anti-corrosion layer is a polytetrafluoroethylene layer, and the waterproof layer is a polyurethane waterproof coating layer.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0016] 1. For this high-precision corrosion-resistant valve casting, the left and right filter frames are fitted with the left and right flanges respectively, so that the left and right rotating rods drive the left and right pressure blocks to start rotating, and the left and right filter frames are tightly fitted with the left and right flanges, so that the left and right filter screens are installed. The left and right filter screens can be used to filter impurities in the solution to prevent the impurities from contacting the inner wall of the valve casting body and damaging the valve casting body.

[0017] 2. The high-precision corrosion-resistant valve casting has good thermal insulation properties through the composition of various materials in the protective components. It also has the properties of corrosion resistance, heat resistance and self-lubrication. It can overcome the defects of ordinary anti-corrosion coatings that are extremely unsuitable for high-temperature chemical equipment conditions, insufficient temperature resistance, and easy to produce peeling, wrinkling, cracking, discoloration, etc. In addition, it can have a long-lasting anti-corrosion effect in a larger temperature range. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a left view of the filter mechanism of the utility model;

[0020] Figure 3It is a schematic diagram of the protective component of the utility model.

[0021] In the figure: 1 valve casting body, 2 filter mechanism, 201 filter frame, 202 filter screen, 203 rotating rod, 204 pressure block, 205 protruding rod, 3 flange, 4 protection component, 401 oxide layer, 402 corrosion-resistant layer, 403 anti-corrosion layer, 404 waterproof layer, 5 valve stem seat, 6 sealing ring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1 A high-precision corrosion-resistant valve casting in this embodiment includes a valve casting body 1, and flanges 3 are fixedly connected to the left and right sides of the valve casting body 1. A filtering mechanism 2 is provided inside the left flange 3, and a protective component 4 is provided inside the valve casting body 1.

[0024] A valve stem seat 5 is installed at the top of the valve casting body 1, and sealing rings 6 are fixed on the opposite sides of the two flanges 3.

[0025] See also Figure 2 In order to filter impurities in the solution, the filtering mechanism 2 in this embodiment includes a filtering frame 201 movably attached to the left side of the left flange 3, a filter screen 202 is fixed inside the filtering frame 201, three rotating rods 203 are threadedly connected to the right side wall of the inner cavity of the left flange 3, and pressure blocks 204 are fixed on the outside of the three rotating rods 203.

[0026] In this example, there are two filter mechanisms 2. The right filter mechanism 2 is installed inside the right flange 3. The filter mechanism 2 also includes three protruding rods 205 fixed on the left side of the filter frame 201. The three pressing blocks 204 are all movably fitted on the left side of the filter frame 201. The left and right filter frames 201 are respectively fitted with the left and right flanges 3. Then the left and right rotating rods 203 are rotated to make the left and right rotating rods 203 drive the left and right pressing blocks 204 to start rotating. When the left and right pressing blocks 204 tightly fit the left and right filter frames 201 with the left and right flanges 3, the left and right filter screens 202 are installed. The left side of the filter frame 201 is provided with three semicircular grooves extending to its right side. The three rotating rods 203 are respectively located inside the three semicircular grooves. The left and right filter screens 202 can be used to filter impurities in the solution to prevent the impurities from contacting the inner wall of the valve casting body 1 and damaging the valve casting body 1.

[0027] It should be noted that the left and right filter frames 201 are respectively fitted with the left and right flanges 3, so that the left and right rotating rods 203 drive the left and right pressure blocks 204 to start rotating, and the left and right filter frames 201 are tightly fitted with the left and right flanges 3, so that the left and right filter screens 202 are installed. The left and right filter screens 202 can be used to filter impurities in the solution to prevent the impurities from contacting the inner wall of the valve casting body 1 and damaging the valve casting body 1.

[0028] See also Figure 3 In order to improve the protectiveness of the valve casting body 1, the protective component 4 in this embodiment includes an oxide layer 401 sprayed on the inner wall of the inner cavity of the valve casting body 1, a corrosion-resistant layer 402 is sprayed on the outside of the oxide layer 401, an anti-corrosion layer 403 is sprayed on the outside of the corrosion-resistant layer 402, and a waterproof layer 404 is sprayed on the outside of the anti-corrosion layer 403.

[0029] In this example, the oxide layer 401 is a chromium aluminum nitride coating. The chromium aluminum nitride coating composition of the oxide layer 401 can effectively improve the high-temperature life of the valve casting body 1 and has good thermal insulation performance. The corrosion-resistant layer 402 is an epoxy resin coating. The epoxy resin coating composition of the corrosion-resistant layer 402 can protect the surface coating from falling off and failing. The anti-corrosion layer 403 is a polytetrafluoroethylene layer. The polytetrafluoroethylene composition of the anti-corrosion layer 403 has anti-corrosion, heat-resistant and self-lubricating properties, and can overcome the common anti-corrosion coatings that are extremely unsuitable for high-temperature chemical equipment conditions, are not heat-resistant, and are prone to peeling, wrinkling, discoloration and other defects. In addition, it can have a long-lasting anti-corrosion effect in a larger temperature range. The waterproof layer 404 is a polyurethane waterproof coating layer. The polyurethane waterproof coating composition of the waterproof layer 404 can improve its water resistance.

[0030] It should be noted that, through the composition of various materials in the protective component 4, the high-precision corrosion-resistant valve casting has good thermal insulation properties, and at the same time has anti-corrosion, heat-resistant and self-lubricating properties, and can overcome the common anti-corrosion coatings that are extremely unsuitable for high-temperature chemical equipment conditions, are not heat-resistant enough, and are prone to peeling, wrinkling, cracking, discoloration and other defects. In addition, it can have a long-lasting anti-corrosion effect in a larger temperature range.

[0031] It is understandable that in the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood through specific circumstances. At the same time, the parts not described in detail in the present invention are all well-known technologies of those skilled in the art.

[0032] The working principle of the above embodiment is:

[0033] (1) When the high-precision corrosion-resistant valve casting is needed to be used, the left and right filter frames 201 are respectively fitted with the left and right flanges 3, and then the left and right rotating rods 203 are rotated to drive the left and right pressing blocks 204 to start rotating. When the left and right pressing blocks 204 tightly fit the left and right filter frames 201 with the left and right flanges 3, the left and right filter screens 202 are installed. The left and right filter screens 202 can be used to filter impurities in the solution to prevent the impurities from contacting the inner wall of the valve casting body 1 and damaging the valve casting body 1.

[0034] (2) The high-precision corrosion-resistant valve casting is composed of a chromium aluminum nitride coating of the oxide layer 401, which can effectively improve the high-temperature life of the valve casting body 1 and has good thermal insulation performance. At the same time, the epoxy resin coating of the corrosion-resistant layer 402 can protect the surface coating from falling off and failing. The polytetrafluoroethylene of the anti-corrosion layer 403 has the properties of corrosion resistance, heat resistance and self-lubrication, and can overcome the defects of ordinary anti-corrosion coatings that are extremely unsuitable for high-temperature chemical equipment conditions, insufficient temperature resistance, and easy to produce peeling, wrinkling, cracking, discoloration, etc. In addition, it can have a long-lasting anti-corrosion effect in a larger temperature range. The polyurethane waterproof coating of the waterproof layer 404 can improve its water resistance.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0036] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. A high-precision corrosion-resistant valve casting, comprising a valve casting body (1), characterized in that: The left and right sides of the valve casting body (1) are both fixedly connected with flanges (3), the interior of the left flange (3) is provided with a filter mechanism (2), and the interior of the valve casting body (1) is provided with a protective component (4); The filtering mechanism (2) comprises a filtering frame (201) movably attached to the left side of the left flange (3); a filtering screen (202) is fixed inside the filtering frame (201); three rotating rods (203) are threadedly connected to the right side wall of the inner cavity of the left flange (3); and pressure blocks (204) are fixed to the outer sides of the three rotating rods (203); The protection component (4) comprises an oxide layer (401) sprayed on the inner wall of the inner cavity of the valve casting body (1), the outer side of the oxide layer (401) is sprayed with a corrosion-resistant layer (402), the outer side of the corrosion-resistant layer (402) is sprayed with an anti-corrosion layer (403), and the outer side of the anti-corrosion layer (403) is sprayed with a waterproof layer (404).

2. A high-precision corrosion-resistant valve casting according to claim 1, characterized in that: A valve stem seat (5) is installed at the top of the valve casting body (1), and sealing rings (6) are fixed on the opposite sides of the two flanges (3).

3. The high-precision corrosion-resistant valve casting according to claim 1, characterized in that: The filtering mechanism (2) further comprises three protruding rods (205) fixed on the left side of the filtering frame (201), and the three pressing blocks (204) are all movably fitted on the left side of the filtering frame (201).

4. The high-precision corrosion-resistant valve casting according to claim 1, characterized in that: The left side of the filter frame (201) is provided with three semicircular grooves extending to the right side thereof, and the three rotating rods (203) are respectively located inside the three semicircular grooves.

5. The high-precision corrosion-resistant valve casting according to claim 1, characterized in that: The number of the filtering mechanisms (2) is two, and the filtering mechanism (2) on the right side is installed inside the right side flange (3).

6. The high-precision corrosion-resistant valve casting according to claim 1, characterized in that: The oxide layer (401) is a chromium aluminum nitride coating, and the corrosion-resistant layer (402) is an epoxy resin coating.

7. The high-precision corrosion-resistant valve casting according to claim 1, characterized in that: The anti-corrosion layer (403) is a polytetrafluoroethylene layer, and the waterproof layer (404) is a polyurethane waterproof coating layer.

Images