Stainless steel valve with anti-corrosion function

Abstract

The stainless steel valve with the anti-corrosion function comprises a valve body, the valve body is provided with a valve body, a valve rod, a valve clack and a hand wheel, the lower end of the valve rod extends into an inner cavity of the valve body and is fixedly connected with the valve clack, and the upper end of the valve rod extends to the position above the valve body and is fixedly connected with the hand wheel. The valve rod is in threaded connection with the valve body, so that the position state of the valve clack is adjusted through rotation of the hand wheel, and the protective sleeve is detachably arranged on the outer side of the valve rod in a sleeving mode. The protective sleeve is matched with the valve rod, so that the valve rod can be shielded and protected by the protective sleeve, the valve rod can be prevented from being rusted due to the influence of external rainwater and the like when the valve is used outdoors, and the service life of the valve is prolonged; and through the arrangement of the structure of the protecting sleeve, the whole protecting sleeve can be conveniently mounted or dismounted on the outer side of the valve rod, so that maintenance personnel can conveniently replace the protecting sleeve, and the use and maintenance convenience of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a stainless steel valve with an anti-corrosion function. Background Art

[0002] Valves are control components in fluid conveying systems, with functions such as shutoff, regulation, diversion, backflow prevention, pressure stabilization, diversion or overflow pressure relief. Valves used in fluid control systems, from the simplest shut-off valves to various valves used in extremely complex automatic control systems, have a wide variety of varieties and specifications. 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. Stainless steel valves are one of the valves. Making the valve body out of stainless steel can make the valve have better corrosion resistance.

[0003] For example, a combined stainless steel valve with publication number CN213451705U has a structure including a valve body, a valve group, a hand wheel and a threaded rod. The threaded rod can be controlled to rotate through the first wheel, and then the valve seat can be controlled to rise and fall, so as to control the opening and closing of the valve and achieve the purpose of controlling the water flow.

[0004] The above-mentioned stainless steel valves also have the following shortcomings: when stainless steel valves are in use, they are sometimes installed on outdoor pipelines, and sometimes there will be rainy weather outside. In rainy weather, the valves are exposed to the outside and will be washed by rainwater. The valve body is generally treated with anti-corrosion on the surface. The odd-numbered threaded rod often moves relative to the valve body thread when in use, and is exposed to the outside. The thread is not easy to be treated with anti-corrosion. After being washed by rainwater for a long time, rust will occur, which will make it difficult for the threaded rod to rotate. When the rust is serious, it may even be unable to rotate. Therefore, a stainless steel valve is needed to solve the above problems. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] The utility model provides a stainless steel valve with an anti-corrosion function, which solves the problem that the threaded portion on the valve stem is easily modified by rainwater, thereby affecting the normal opening and closing operation of the valve.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a stainless steel valve with anti-corrosion function, including a valve body, the valve body having a valve body, a valve stem, a valve disc and a handwheel, the lower end of the valve stem extends into the inner cavity of the valve body and is fixedly connected to the valve disc, the upper end of the valve stem extends to the top of the valve body and is fixedly connected to the handwheel, the valve stem and the valve body are threadedly connected so that the rotation of the handwheel adjusts the position of the valve disc, and also includes a protective sleeve, which is detachably mounted on the outer side of the valve stem, and the protective sleeve is respectively connected to the upper end of the valve body and the lower end of the handwheel, so that the external thread on the surface of the valve stem is covered on the inner side of the protective sleeve.

[0009] Preferably, a positioning column with an annular cross-section is formed at the upper end of the valve body, a bottom positioning ring is formed on the outer wall of the positioning column, a distance is provided between the bottom positioning ring and the upper end of the positioning column, a top positioning ring fixedly connected to the valve stem is sleeved at the connection between the handwheel and the valve stem, an annular groove is formed on the outer wall of the top positioning ring.

[0010] In a further embodiment, the protective sleeve includes a soft waterproof layer, which is arranged in a cylindrical shape on the outside of the valve stem, and the upper end and the lower end of the inner wall of the soft waterproof layer are respectively fitted with the outer wall of the positioning column and the inner wall of the annular groove, and a snap-fitting area is formed on the outer walls of the connecting ends of the soft waterproof layer when it is formed into a cylinder, and an adhesive layer covering the seam of the soft waterproof layer is fitted in the snap-fitting area, and the adhesive layer is bonded and fixed to the inner wall of the snap-fitting area, and the soft waterproof layer and the adhesive layer are both arranged as waterproof rubber layers.

[0011] In a further preferred embodiment, the protective sleeve also includes two annular elastic sleeves, which are respectively sleeved on the upper and lower ends of the outer side of the soft waterproof layer, the annular elastic sleeves are configured as elastic rubber sleeves, and the inner diameter of the annular elastic sleeves in a natural state is smaller than the outer diameter of the positioning column base, and the annular elastic sleeves cover the joints between the soft waterproof layer and the positioning column base and the top positioning ring.

[0012] (III) Beneficial effects

[0013] Compared with the prior art, the utility model provides a stainless steel valve with anti-corrosion function, which has the following beneficial effects:

[0014] In the utility model, the protective sleeve and the valve stem are matched to each other, so that the valve stem can be protected by the protective sleeve, thereby preventing the valve stem from rusting due to external rain when the valve is used outdoors, thereby improving the service life of the valve; through the setting of the protective sleeve's own structure, the protective sleeve as a whole can be easily installed or disassembled on the outside of the valve stem, thereby facilitating maintenance personnel to replace it, thereby improving the convenience of use and maintenance of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of a stainless steel valve with anti-corrosion function according to the implementation scheme;

[0016] Figure 2 is a schematic structural diagram of a valve body according to an implementation scheme;

[0017] Figure 3 is a schematic structural diagram of a protective sleeve according to an embodiment;

[0018] Figure 4 It is a schematic diagram of the exploded structure of the soft waterproof layer according to the embodiment.

[0019] In the figure: 10, valve body; 11, valve body; 12, valve stem; 13, hand wheel; 14, positioning column; 15, bottom positioning ring; 16, top positioning ring; 20, protective cover; 21, soft waterproof layer; 210, buckle area; 211, adhesive layer; 22, annular elastic cover. DETAILED DESCRIPTION

[0020] 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.

[0021] See also Figure 1 , a stainless steel valve with anti-corrosion function, including a valve body 10 and a protective sleeve 20. The protective sleeve 20 is detachably mounted on the outer side of the valve stem 12 in the valve body 10, and the protective sleeve 20 is respectively connected to the upper end of the valve body 11 and the lower end of the hand wheel 13, so that the external thread on the surface of the valve stem 12 can be covered on the inner side of the protective sleeve 20, thereby reducing the rust effect caused by rainwater. In addition, the protective sleeve 20 itself has a certain deformation ability, so that during the rotation and movement of the valve stem 12, the protective sleeve 20 can be squeezed or stretched to deform, and the protective sleeve 20 keeps covering the external thread on the surface of the valve stem 12.

[0022] See also Figure 2The valve body 10 may include a valve body 11, a valve stem 12, a valve flap and a hand wheel 13. Like common valves, the lower end of the valve stem 12 extends into the inner cavity of the valve body 11 and is fixedly connected to the valve flap, the upper end of the valve stem 12 extends above the valve body 11 and is fixedly connected to the hand wheel 13, and the valve stem 12 is threadedly connected to the valve body 11, so that the user can use the valve flap to adjust the opening and closing state of the valve when rotating the hand wheel 13. A positioning column 14 with an annular cross section is formed at the upper end of the valve body 11, and a bottom positioning ring 15 is formed on the outer wall of the positioning column 14, and there is a certain distance between the bottom positioning ring 15 and the upper end of the positioning column 14. A top positioning ring 16 fixedly connected to the valve stem 12 is sleeved at the connection between the hand wheel 13 and the valve stem 12, and an annular groove is formed on the outer wall of the top positioning ring 16. The steps formed between the top positioning ring 16 and the bottom positioning ring 15 and the positioning column 14 are symmetrical and are used to position the installation of the protective sleeve 20.

[0023] See also Figure 3 and Figure 4 , the protective sleeve 20 may include a soft waterproof layer 21 and two annular elastic sleeves 22. The soft waterproof layer 21 is formed into a cylindrical sleeve on the outside of the valve stem 12; the upper end and the lower end of the inner wall of the soft waterproof layer 21 are respectively in contact with the outer wall of the positioning column 14 and the inner wall of the annular groove, thereby positioning and placing the soft waterproof layer 21. The annular elastic sleeve 22 is configured as an elastic rubber sleeve, and the inner diameter of the annular elastic sleeve 22 in a natural state is smaller than the outer diameter of the positioning column 14, so that the two annular elastic sleeves 22 can be respectively sleeved on the upper end and the lower end of the outer side of the soft waterproof layer 21 to tighten and fix the soft waterproof layer 21. When placed, the annular elastic sleeve 22 can cover the joint between the soft waterproof layer 21 and the positioning column 14 and the top positioning ring 16, so that the annular elastic sleeve 22 can tighten the upper and lower ends of the soft waterproof layer 21 to reduce the inflow of rainwater from the end of the soft waterproof layer 21.

[0024] In this embodiment, the soft waterproof layer 21 can be formed into a cylindrical shape by using a sheet-like waterproof rubber layer, and a concave buckle area 210 can be pre-cut on the outer wall of the connecting ends of the soft waterproof layer 21 when the soft waterproof layer 21 is formed into a cylinder. An adhesive layer 211 covering the seam between the connecting ends of the soft waterproof layer 21 can be placed in the buckle area 210, and the adhesive layer 211 can be bonded and fixed to the inner wall of the buckle area 210 by using an adhesive, so that the soft waterproof layer 21 forms a complete cylindrical shape. The adhesive layer 211 can be made of the same material as the soft waterproof layer 21, such as EPDM rubber material.

[0025] When removing the protective sleeve 20, the two annular elastic sleeves 22 can be moved away from the upper and lower ends of the soft waterproof layer 21 respectively to separate therefrom, and then the adhesive layer 211 can be torn off from the buckle area 210, so that the sheet-like soft waterproof layer 21 can be removed from the valve stem 12.

[0026] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which are not described one by one here. In the above, all fixed connections are preferably welded. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A stainless steel valve with anti-corrosion function, comprising a valve body (10), wherein the valve body (10) has a valve body (11), a valve stem (12), a valve disc and a hand wheel (13), wherein the lower end of the valve stem (12) extends into the inner cavity of the valve body (11) and is fixedly connected to the valve disc, and the upper end of the valve stem (12) extends above the valve body (11) and is fixedly connected to the hand wheel (13), wherein the valve stem (12) and the valve body (11) are threadedly connected so that the rotation of the hand wheel (13) adjusts the position of the valve disc, characterized in that: It also includes a protective sleeve (20), which is detachably mounted on the outer side of the valve stem (12), and the protective sleeve (20) is respectively connected to the upper end of the valve body (11) and the lower end of the hand wheel (13), so that the external thread on the surface of the valve stem (12) is covered on the inner side of the protective sleeve (20).

2. The stainless steel valve with anti-corrosion function according to claim 1, characterized in that: The upper end of the valve body (11) is formed with a positioning column (14) having an annular cross-section, and a bottom positioning ring (15) is formed on the outer wall of the positioning column (14), and a distance is provided between the bottom positioning ring (15) and the upper end of the positioning column (14), and a top positioning ring (16) fixedly connected to the valve stem (12) is sleeved at the connection between the hand wheel (13) and the valve stem (12), and an annular groove is formed on the outer wall of the top positioning ring (16).

3. The stainless steel valve with anti-corrosion function according to claim 2, characterized in that: The protective sleeve (20) comprises a soft waterproof layer (21), the soft waterproof layer (21) is arranged in a cylindrical shape on the outer side of the valve stem (12), and the upper end and the lower end of the inner wall of the soft waterproof layer (21) are respectively in contact with the outer wall of the positioning column (14) and the inner wall of the annular groove, and a buckling area (210) is formed on the outer walls of the connecting ends of the soft waterproof layer (21) when the soft waterproof layer (21) is in a cylindrical shape, and an adhesive layer (211) covering the seam of the soft waterproof layer (21) is in contact with the buckling area (210), and the adhesive layer (211) is bonded and fixed to the inner wall of the buckling area (210).

4. The stainless steel valve with anti-corrosion function according to claim 3, characterized in that: The soft waterproof layer (21) and the adhesive layer (211) are both configured as waterproof rubber layers.

5. The stainless steel valve with anti-corrosion function according to claim 4, characterized in that: The protective sleeve (20) further comprises two annular elastic sleeves (22), the two annular elastic sleeves (22) being respectively sleeved on the upper end and the lower end of the outer side of the soft waterproof layer (21), the annular elastic sleeves (22) being configured as elastic rubber sleeves, and the inner diameter of the annular elastic sleeves (22) in a natural state is smaller than the outer diameter of the positioning column platform (14).

6. The stainless steel valve with anti-corrosion function according to claim 5, characterized in that: The annular elastic sleeve (22) covers the joints between the soft waterproof layer (21), the positioning column platform (14) and the top positioning ring (16).

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