Gate valve with anti-rust function

Abstract

The utility model provides a gate valve with antirust function, including the valve body, set up in the upper end of valve body gland, open in the opening on gland, set up in the upper end of gland hand wheel, set up in the valve body and with hand wheel threaded connection's valve rod, still include two cooperation seat that set up in the valve cover in opening inside up and down symmetry, open in two cooperation seat's avoidance opening, set up between two cooperation seat and located valve rod outside's insulating sleeve, set up in the upper end of rotating hand wheel and located valve rod's outside's insulating cavity, open in the upper end of top rod cover and with insulating cavity intercommunication's top opening, slidable set up in top rod cover in top opening inside's prompt rod, set up in top rod cover's elastic cover.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, specifically to a gate valve with rust prevention function. Background Technology

[0002] A gate valve is an opening and closing element consisting of a gate. The gate's movement is perpendicular to the fluid direction. Gate valves can only be fully open or fully closed; they cannot be used for regulation or throttling. Gate valves achieve sealing through the contact between the valve seat and the gate. Typically, a metal material is welded onto the sealing surface to increase wear resistance.

[0003] Gate valves can be divided into two types: rising stem and non-rising stem. These two types of gate valves differ significantly in structure, working principle, and application scenarios. In a rising stem gate valve, the operating stem is exposed; rotating a handwheel raises and lowers the stem, thus controlling the opening and closing of the valve. This design makes the operation process intuitive and allows for clear observation of the valve's opening degree. The advantages of rising stem gate valves lie in their simple structure, ease of maintenance, and the fact that the stem is exposed, enabling timely detection and troubleshooting.

[0004] However, the stem of a rising stem gate valve is exposed to the air for a long time, and it is impossible to reduce the contact between the stem and the moisture in the air. When used in a humid environment, the stem is prone to contact with moisture and oxygen in the air, which can easily lead to rusting of the stem and thus affect the opening and closing control of the stem. Utility Model Content

[0005] The purpose of this utility model is to provide a gate valve with rust prevention function in order to address the defects and deficiencies of the existing technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a gate valve with rust prevention function, comprising a valve body, a pressure cap disposed at the upper end of the valve body, an opening formed on the pressure cap, a handwheel disposed at the upper end of the pressure cap, a valve stem disposed on the valve body and threadedly connected to the handwheel, and further comprising two mating seats symmetrically disposed on the pressure cap within the opening, an avoidance opening formed on the two mating seats, and an opening disposed between the two mating seats and located outside the valve stem, for reducing the impact of external humid air on the valve stem located within the opening. The system includes: an insulating sleeve for contact; a top rod cover located on the upper end of the handwheel and outside the valve stem to reduce contact between external humid air and the valve stem located above the handwheel; an insulating cavity opened on the top rod cover; a top opening opened on the upper end of the top rod cover and connected to the insulating cavity; a slidable indicator rod located on the top rod cover within the top opening; and an elastic cover located on the top rod cover within the insulating cavity and below the top opening. The lower end face of the indicator rod is fixedly connected to the elastic cover, and the diameter of the avoidance opening is larger than the diameter of the valve stem.

[0007] A further improvement is that the insulating sleeve is spliced ​​and connected by a main sleeve and a secondary sleeve, and the main sleeve and the secondary sleeve are spliced ​​and fixed by a fastener. Both the upper and lower ends of the main sleeve and the secondary sleeve are provided with sealing rings, and both mating seats are provided with sealing ring grooves that mate with the sealing rings.

[0008] A further improvement is that: the main sleeve and the auxiliary sleeve are provided with a plurality of mounting inner grooves, the main sleeve and the auxiliary sleeve are filled with water-absorbing resin in the mounting inner grooves, and a disassembly block is detachably provided between the main sleeve and the auxiliary sleeve in each mounting inner groove, and a limit filter screen is provided on the disassembly block.

[0009] A further improvement is that the disassembly block is a rubber block, and the disassembly block is interference-fitted with the mounting inner groove.

[0010] A further improvement is that the fixing component includes a fixing groove formed on the main sleeve, a fixing protrusion on the secondary sleeve that fully fits the fixing groove, and an adsorption sheet fixedly disposed on the main sleeve in the fixing groove, wherein the fixing protrusion and the adsorption sheet are magnetically adsorbed together.

[0011] A further improvement is that the adsorption sheet is made of metallic iron, metallic cobalt, or metallic nickel, and the fixing protrusion is a south pole magnetic block or a north pole magnetic block.

[0012] A further improvement is that the insulating sleeve is a nylon sleeve or a stainless steel sleeve.

[0013] After adopting the above technical solution, the beneficial effects of this utility model are as follows: Since the valve stem of the rising stem gate valve is exposed to the air for a long time, the isolation sleeve can reduce the contact between the external humid air and the valve stem located in the opening, thereby protecting the valve stem located in the opening and reducing the occurrence of rust due to contact between the valve stem located in the opening and the moisture in the air. When the valve stem is rotated by the handwheel, the valve stem located above the handwheel will rise and fall with the rotation. At this time, the valve stem is wrapped in the isolation cavity by the top rod cover to reduce the contact between the external humid air and the valve stem located above the handwheel. When the valve stem rises to the top with the rotation, the upper end of the valve stem pushes up the elastic cover, causing the indicator rod to rise in the top opening. The protrusion of the indicator rod makes it easy for the operator to observe the opening and closing status of the gate valve. The setting of the isolation sleeve and the top rod cover can reduce the contact between the valve stem and the moisture in the air. Even when used in a humid environment, the valve stem is not easy to come into contact with moisture and oxygen in the air, and the valve stem is not easy to rust, thus not easily affecting the opening and closing control of the valve stem. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a front view of the present invention; Figure 2 This is a front sectional view of the pressure cap, opening, handwheel, mating seat, and isolation sleeve in this utility model; Figure 3 This is a top sectional view of the pressure cap and the insulating sleeve in this utility model; Figure 4 This is a top sectional view of the insulating sleeve and the mounting inner groove in this utility model; Figure 5 This is a front view of the main sleeve and sealing ring in this utility model; Figure 6 This is a schematic diagram of the main sleeve in this utility model; Figure 7 It corresponds Figure 2 Enlarged view of part A.

[0016] Explanation of reference numerals in the attached drawings: Valve body 1, gland 2, opening 3, handwheel 4, valve stem 5, mating seat 6, clearance opening 7, isolation sleeve 8, top rod cover 10, isolation cavity 11, top opening 12, indicator rod 13, elastic cover 14, main sleeve 81, auxiliary sleeve 82, sealing ring 15, sealing ring groove 16, mounting inner groove 17, water-absorbing resin 18, disassembly block 19, limiting filter screen 20, fixing groove 21, fixing protrusion 22, adsorption sheet 23. Detailed Implementation

[0017] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0018] See Figures 1 to 7As shown, the technical solution adopted in this specific embodiment is: a gate valve with anti-rust function, including a valve body 1, a pressure cap 2 disposed at the upper end of the valve body 1, an opening 3 opened on the pressure cap 2, a handwheel 4 disposed at the upper end of the pressure cap 2, a valve stem 5 disposed on the valve body 1 and threadedly connected to the handwheel 4, and further including two mating seats 6 symmetrically disposed on the pressure cap 2 within the opening 3, an avoidance opening 73 opened on the two mating seats 6, an isolation sleeve 8 disposed between the two mating seats 6 and located outside the valve stem 5, for reducing the contact between external humid air and the valve stem 5 located within the opening 3, and a set of The top rod cover 10, located at the upper end of the handwheel 4 and outside the valve stem 5, is used to reduce the contact between external humid air and the valve stem 5 located above the handwheel 4. An isolation cavity 11 is opened on the top rod cover 10. A top opening 12 is opened at the upper end of the top rod cover 10 and communicates with the isolation cavity 11. A prompting rod 13 is slidably disposed on the top rod cover 10 and located in the top opening 12. An elastic cover 14 is disposed on the top rod cover 10, located in the isolation cavity 11, and located below the top opening 12. The lower end face of the prompting rod 13 is fixedly connected to the elastic cover 14, and the diameter of the avoidance opening 73 is larger than the diameter of the valve stem 5.

[0019] The mating seat 6 is fixed to the pressure cap 2 by welding or integrally formed with the pressure cap 2. A clearance opening 73 is formed through both mating seats 6. The lower end of the top rod cover 10 is fixed to the upper end of the handwheel 4 by adhesive or by welding. The material of the top rod cover 10 can be nylon or other rust-resistant materials, such as stainless steel. Stainless steel also facilitates welding between the top rod cover 10 and the handwheel 4. The isolation cavity 11 is the space formed by the top rod cover 10 mounted on the handwheel 4. A top opening 12 is formed through the top rod and communicates with the formed isolation cavity 11. The elastic cover 14 is installed on the upper inner wall of the top rod cover 10 and is fixed to the top rod cover 10 by adhesive or hot-melt methods. The lower end of the indicator rod 13 is fixed to the elastic cover 14 by adhesive or hot-melt cooling. The elastic cover 14 can be an arc-shaped cover or a square cover.

[0020] The insulating sleeve 8 is composed of a main sleeve 81 and a secondary sleeve 82 connected together. The main sleeve 81 and the secondary sleeve 82 are fixed together by fasteners. Both the upper and lower ends of the main sleeve 81 and the secondary sleeve 82 are provided with sealing rings 15. Each of the two mating seats 6 has a sealing ring groove 16 that mates with the sealing ring 15. When the insulating sleeve 8 is located between the two mating seats 6, the center of the sealing ring groove 16 is offset from the center of the sealing ring 15, or the diameter of the sealing ring groove 16 is smaller than the diameter of the sealing ring 15. Therefore, when the insulating sleeve 8 is installed between the two mating seats 6, the sealing ring 15 can be pressed tightly into the sealing ring groove 16 to form a seal.

[0021] The main sleeve 81 and the auxiliary sleeve 82 are provided with a plurality of mounting inner grooves 17. Water-absorbing resin 18 is filled in the mounting inner grooves 17 on the main sleeve 81 and the auxiliary sleeve 82. A detachable disassembly block 19 is detachably installed between the main sleeve 81 and the auxiliary sleeve 82 on each mounting inner groove 17. A limiting filter screen 20 is installed on the disassembly block 19. The water-absorbing resin 18 is a superabsorbent polymer (SAP), a typical functional polymer material. It can absorb hundreds or even thousands of times its own weight in water and has a strong water retention capacity; therefore, it is also known as a super absorbent or high water retention agent.

[0022] After the absorbent resin 18 has been used for a period of time, the disassembly block 19 can be removed from the mounting inner groove 17 by separating the main sleeve 81 and the auxiliary sleeve 82. This allows the absorbent resin 18 that has absorbed moisture to be poured out, and the absorbent resin 18 that has not absorbed moisture to be put into the mounting inner groove 17, thereby completing the replacement of the absorbent resin 18.

[0023] The limiting filter 20 is used to allow humid air to pass through the disassembly block 19 into the mounting inner groove 17, so that the water-absorbing resin 18 can absorb the humid air, thereby reducing the air humidity outside the valve stem 5 and further improving the rust prevention effect. In addition, the setting of the limiting filter 20 can also prevent the water-absorbing resin 18 from detaching from the mounting inner groove 17.

[0024] The disassembly block 19 is a rubber block, and it is interference-fitted with the mounting inner groove 17. The interference fit clearance between the disassembly block 19 and the mounting inner hole is between 0.3-1.2mm. The disassembly block 19 is embedded and fixed by pressing it into the mounting inner groove 17. When it needs to be removed, it can be pried out with a tool or fingernail.

[0025] The fastener includes a fixing groove 21 formed on the main sleeve 81, a fixing protrusion 22 on the secondary sleeve 82 that fully fits the fixing groove 21 with a clearance, and an adsorption sheet 23 fixedly disposed on the main sleeve 81 within the fixing groove 21. The fixing protrusion 22 and the adsorption sheet 23 are magnetically adsorbed together. The adsorption sheet 23 is fixed by adhesive or integrally formed with the main sleeve 81 by injection molding.

[0026] The adsorption sheet 23 is made of metal iron, metal cobalt, or metal nickel, and the fixing protrusion 22 is a south pole magnetic block or a north pole magnetic block.

[0027] When installing the isolation sleeve 8, first place the main sleeve 81 and the auxiliary sleeve 82 parallel between the two mating seats 6, and outside the valve stem 5. Then, align the fixing protrusion 22 of the auxiliary sleeve 82 with the fixing groove 21 of the main sleeve 81 and insert it to fix the main sleeve 81 and the auxiliary sleeve 82 together. Then, align the sealing ring 15 with the sealing groove and insert it until the isolation sleeve 8 is installed between the two mating seats 6. When it is necessary to remove the isolation sleeve 8, first separate the main sleeve 81 from the auxiliary sleeve 82 with a tool, and then remove the main sleeve 81 and the auxiliary sleeve 82 from the two mating seats 6 respectively. Alternatively, first pull the isolation sleeve 8 to separate the sealing ring 15 from the sealing ring groove 16, and then separate the main sleeve 81 and the auxiliary sleeve 82 with a tool.

[0028] The insulating sleeve 8 is a nylon sleeve or a stainless steel sleeve.

[0029] The working principle of this utility model is as follows: Since the valve stem 5 of the rising stem gate valve is exposed to the air for a long time, the isolation sleeve 8 can reduce the contact between the external humid air and the valve stem 5 located in the opening 3, thereby protecting the valve stem 5 located in the opening 3 and reducing the occurrence of rust due to contact between the valve stem 5 located in the opening 3 and the moisture in the air. Furthermore, when the handwheel 4 controls the rotation of the valve stem 5, the valve stem 5 located above the handwheel 4 will rise and fall with the rotation. At this time, the top rod cover 10 encloses the valve stem 5 in the isolation cavity 11, further reducing the contact between the external humid air and the valve stem 5. The valve stem 5 contacts the handwheel 4 above. When the valve stem 5 is rotated and rises to the top, the upper end of the valve stem 5 pushes up the elastic cover 14, causing the indicator rod 13 to rise in the top opening 12. The protrusion of the indicator rod 13 makes it easy for the operator to observe the opening and closing status of the gate valve. The setting of the isolation sleeve 8 and the top rod cover 10 can reduce the contact between the valve stem 5 and the moisture in the air. Even when used in a humid environment, the valve stem 5 is not easy to come into contact with moisture and oxygen in the air, and the valve stem 5 is not easy to rust, thus not easily affecting the opening and closing control of the valve stem 5.

[0030] This utility model aims to protect the structure of the product. The model numbers of the individual components are not the subject of this utility model's protection and are already known technology. Any component on the market that can achieve the functions described above can be used as a gate valve with rust prevention capabilities. Therefore, the model numbers and other parameters of the components are not described in detail in this utility model. The contribution of this utility model lies in the scientific combination of the various components.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions provided are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents. Any aspects of this utility model not detailed herein are well-known to those skilled in the art.

Claims

1. A gate valve with rust prevention function, comprising a valve body, a gland disposed at the upper end of the valve body, an opening formed in the gland, a handwheel disposed at the upper end of the gland, and a valve stem disposed on the valve body and threadedly connected to the handwheel, characterized in that: It also includes two mating seats symmetrically arranged on the cover within the opening, a clearance opening on the two mating seats, an insulating sleeve located between the two mating seats and outside the valve stem to reduce contact between external humid air and the valve stem within the opening, a top rod cover located at the upper end of the handwheel and outside the valve stem to reduce contact between external humid air and the valve stem above the handwheel, an insulating cavity on the top rod cover, a top opening at the upper end of the top rod cover and connected to the insulating cavity, a slidable indicator rod on the top rod cover within the top opening, and an elastic cover on the top rod cover within the insulating cavity and below the top opening. The lower end face of the indicator rod is fixedly connected to the elastic cover, and the diameter of the clearance opening is larger than the diameter of the valve stem.

2. A gate valve with rust prevention function according to claim 1, characterized in that: The insulating sleeve is composed of a main sleeve and a secondary sleeve connected together. The main sleeve and the secondary sleeve are connected and fixed by fasteners. Both the upper and lower ends of the main sleeve and the secondary sleeve are provided with sealing rings. Both mating seats are provided with sealing ring grooves that mate with the sealing rings.

3. A gate valve with rust prevention function according to claim 2, characterized in that: The main sleeve and the auxiliary sleeve are provided with a plurality of mounting inner grooves. Water-absorbing resin is filled in the mounting inner grooves on the main sleeve and the auxiliary sleeve. A disassembly block is detachably provided between the main sleeve and the auxiliary sleeve on each mounting inner groove. A limit filter screen is provided on the disassembly block.

4. A gate valve with rust prevention function according to claim 3, characterized in that: The disassembly block is a rubber block, and the disassembly block is interference-fitted with the mounting inner groove.

5. A gate valve with rust prevention function according to claim 2, 3, or 4, characterized in that: The fastener includes a fixing groove formed on the main sleeve, a fixing protrusion on the secondary sleeve that is fully fitted with the fixing groove, and an adsorption sheet fixedly disposed on the main sleeve in the fixing groove, wherein the fixing protrusion and the adsorption sheet are magnetically adsorbed together.

6. A gate valve with rust prevention function according to claim 5, characterized in that: The adsorption sheet is made of metallic iron, metallic cobalt, or metallic nickel, and the fixing protrusion is a south pole magnetic block or a north pole magnetic block.

7. A gate valve with rust prevention function according to claim 1 or 2, characterized in that: The insulating sleeve is a nylon sleeve or a stainless steel sleeve.

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