Ball valve for urea

Abstract

This application discloses a ball valve for urea production, belonging to the field of valve technology. It mainly includes a valve body comprising a first valve seat and a second valve seat, and a heating assembly mounted on the first and second valve seats. The heating assembly includes a first semi-circular tube and a second semi-circular tube respectively mounted on the first and second valve seats. The outer walls of the first and second valve seats are provided with mounting grooves, allowing the first and second semi-circular tubes to be snapped into these grooves. This ball valve for urea production utilizes an externally designed heating assembly. The first and second semi-circular tubes are snapped into the grooves by a locking block and secured with bolts within the mounting grooves on the outer wall of the valve seat. When the heating pipe is clogged with scale, the bolts can be directly removed to separate the first and second semi-circular tubes for cleaning or replacement, without disassembling or replacing the entire valve body. This reduces maintenance difficulty and cost, and improves the practicality of the equipment.

Description

Technical Field

[0001] This application relates to the field of valve technology, specifically a ball valve for urea. Background Technology

[0002] Ball valves are commonly used to control the delivery of urea solutions in the synthesis, separation, and evaporation processes of urea. In evaporation systems, the concentrated urea solution (which has a high concentration and is prone to crystallization) is fed into the granulation tower via a ball valve. The ball valve's rapid opening and closing characteristics allow for timely responses to adjustments in process parameters, ensuring a stable granulation process.

[0003] However, some existing urea ball valves, due to the high concentration of concentrated urea solution and its tendency to crystallize, tend to crystallize between the valve core and seat when the urea flows through the valve body. Therefore, a heating channel needs to be installed inside the valve seat, through which hot water can be circulated for heating. The heating temperature is controlled at 60-80℃, which can effectively prevent urea solution from crystallizing on the valve core and seat without affecting the normal operation of the valve. Since the heating channel is located inside the valve body, scale can easily clog it after long-term use, thus affecting the heating effect. Once clogged, it is difficult to replace and clean the heating components, resulting in low practicality. In severe cases of clogging, the entire valve body may even need to be replaced, increasing maintenance costs.

[0004] Therefore, it is necessary to provide a ball valve for urea to solve the above problems.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0006] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is to provide a ball valve for urea, which solves the problem that the heating channel is located inside the valve body and it is difficult to effectively replace and clean the inside of the channel when it is blocked.

[0007] The technical solution adopted by this application to solve its technical problem is: a ball valve for urea, including a valve body, wherein the valve body includes a first valve seat and a second valve seat; A heating assembly is installed on the first valve seat and the second valve seat. The heating assembly includes a first semi-circular tube and a second semi-circular tube respectively installed on the first valve seat and the second valve seat. The outer walls of the first valve seat and the second valve seat are provided with mounting grooves. The first semi-circular tube and the second semi-circular tube can be snapped into the mounting grooves. A locking block is installed at the other end of the first semi-circular tube, and a locking groove is opened at the other end of the second semi-circular tube. The locking block is snapped into the locking groove. A heat insulation component is installed on the first valve seat and the second valve seat.

[0008] Furthermore, a water inlet pipe is installed at one end of the first semicircular tube, and a water outlet pipe is installed at one end of the second semicircular tube.

[0009] Furthermore, a first sealing ring is provided between the first semicircular tube and the second semicircular tube.

[0010] Furthermore, the heat insulation assembly includes a first semicircular heat insulation frame and a second semicircular heat insulation frame respectively installed on the first valve seat and the second valve seat. The two ends of the first semicircular heat insulation frame and the second semicircular heat insulation frame are fixedly installed by bolts, and the inner walls of the first semicircular heat insulation frame and the second semicircular heat insulation frame are both equipped with heat insulation plates.

[0011] Furthermore, the heat insulation board is made of high-temperature resistant aluminum silicate fiber board.

[0012] Furthermore, a valve core is provided inside the first valve seat and the second valve seat, and a valve stem is provided at the upper end of the first valve seat and the second valve seat. When the first valve seat and the second valve seat are installed correspondingly, the upper ends of the first valve seat and the second valve seat form a channel for installing the valve stem. The valve stem is rotatably installed in the channel formed between the first valve seat and the second valve seat. A limit groove is provided on the valve core, and the valve stem is snapped into the limit groove on the valve core. A handle is fixedly installed at the upper end of the valve stem. The interior of the first valve seat and the second valve seat, as well as the outer and inner walls of the valve core, are all provided with a wear-resistant hard coating, which is an EDC coating.

[0013] Furthermore, a second sealing ring is provided between the first valve seat and the second valve seat, and the first valve seat and the second valve seat are fixedly installed together by bolts.

[0014] The beneficial effects of this application are as follows: The ball valve for urea provided by this application adopts an external heating component design. The first and second semicircular tubes are engaged with the slot by a locking block and fixed in the mounting groove on the outer wall of the valve seat with bolts. When the heating pipeline is clogged with scale, the bolts can be directly removed to separate the first and second semicircular tubes for cleaning or replacement, without disassembling or replacing the entire valve body. This reduces maintenance difficulty and cost, and improves the practicality of the equipment.

[0015] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1This is an overall schematic diagram of a ball valve for urea in this application; Figure 2 This is a schematic rear view of an overall urea ball valve according to this application; Figure 3 This is a partial schematic diagram of a ball valve for urea production according to this application; Figure 4 This is a partial rear view schematic diagram of a ball valve for urea in this application; Figure 5 This is an explosion diagram of a ball valve for urea production according to this application; Figure 6 This is a schematic diagram of the explosion back view of a ball valve for urea in this application; Figure 7 This is a cross-sectional schematic diagram of a ball valve for urea in this application; Figure 8 This is a schematic diagram of the heat insulation component of a ball valve for urea in this application; Figure 9 This is a schematic diagram of the heating assembly of a ball valve for urea in this application; Figure 10 This is a bottom view schematic diagram of the heating assembly of a ball valve for urea in this application.

[0017] The following are the labeling elements in the figure: 1. Valve body; 11. First valve seat; 12. Second valve seat; 2. Heating assembly; 21. First semi-circular tube; 22. Second semi-circular tube; 23. Locking block; 24. Locking groove; 25. First sealing ring; 26. Water inlet pipe; 27. Water outlet pipe; 28. Mounting groove; 3. Heat insulation assembly; 31. First semi-circular heat insulation frame; 32. Second semi-circular heat insulation frame; 33. Heat insulation plate; 4. Valve stem; 5. Valve core; 6. Second sealing ring; 7. Handle. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0020] like Figure 1-7As shown, this application provides a ball valve for urea, including a valve body 1. The valve body 1 serves as the basic structure of the ball valve and includes a first valve seat 11 and a second valve seat 12. Both the first valve seat 11 and the second valve seat 12 are internally coated with a wear-resistant hard coating, which is an EDC coating. The EDC coating can effectively resist the corrosion of urea solution and extend its service life. The first valve seat 11 and the second valve seat 12 are fixedly installed together by high-strength bolts, ensuring a tight and reliable connection and preventing leakage. A second sealing ring 6 is provided at the mating surface of the first valve seat 11 and the second valve seat 12. The second sealing ring 6 is made of urea-resistant fluororubber, which has good sealing performance and elasticity, further enhancing the sealing performance of the valve body 1 and preventing urea solution from seeping out from the mating surface.

[0021] The first valve seat 11 and the second valve seat 12 are equipped with valve cores 5. The outer and inner walls of the valve core 5 are also equipped with wear-resistant hard coatings, which are also EDC coatings. The EDC coating can reduce the scouring and wear of the valve core 5 when the urea solution flows, and can also prevent it from being corroded by the urea solution.

[0022] A valve stem 4 is provided at the upper end of the first valve seat 11 and the second valve seat 12. The valve stem 4 is made of high-strength alloy steel, which has good mechanical strength and toughness. When the first valve seat 11 and the second valve seat 12 are installed correspondingly, their upper ends form a channel for installing the valve stem 4. The valve stem 4 is rotatably installed in this channel, and a sealing element is provided at the mating point between the valve stem 4 and the channel to prevent urea solution from seeping out along the valve stem 4.

[0023] The valve core 5 is provided with a limiting groove (not marked in the figure). The shape of the limiting groove matches the lower end of the valve stem 4. The valve stem 4 is snapped into the limiting groove on the valve core 5. This connection method ensures that when the valve stem 4 rotates, it drives the valve core 5 to rotate synchronously, thereby realizing the opening and closing control of the valve. A handle 7 is fixedly installed on the upper end of the valve stem 4 for easy gripping and rotation by the operator. By rotating the handle 7, the valve stem 4 and the valve core 5 are rotated, thereby controlling the flow and shut-off of the urea solution.

[0024] like Figure 9-10 As shown, to prevent urea solution from crystallizing inside the valve body 1 at low temperatures, heating components 2 are provided on the first valve seat 11 and the second valve seat 12. The heating components 2 include a first semicircular tube 21 and a second semicircular tube 22 respectively installed on the first valve seat 11 and the second valve seat 12. The first semicircular tube 21 and the second semicircular tube 22 are made of copper with excellent thermal conductivity, enabling rapid heat transfer. The outer walls of the first valve seat 11 and the second valve seat 12 are provided with mounting grooves 28 that fit the shape of the semicircular tubes, ensuring that when the two first semicircular tubes 21 and the two second semicircular tubes 22 are installed together, they fit tightly within the mounting grooves 28, forming a ring-shaped heating pipeline that evenly wraps around the valve body 1, improving heating efficiency.

[0025] A water inlet pipe 26 is installed at one end of the first semicircular tube 21, and a water outlet pipe 27 is installed at one end of the second semicircular tube 22. Both the water inlet pipe 26 and the water outlet pipe 27 are made of stainless steel and are connected to the semicircular tubes by welding, resulting in a firm and well-sealed connection. A locking block 23, made of the same material as the first and second semicircular tubes 21, is fixedly installed at the other end of the first semicircular tube 21. A locking groove 24, matching the locking block 23, is opened at the other end of the second semicircular tube 22. The locking block 23 is snapped into the locking groove 24, achieving the initial positioning of the first and second semicircular tubes 21 and 22.

[0026] Subsequently, the first semicircular pipe 21 and the second semicircular pipe 22 are fixedly connected by bolts to further ensure the stability of the connection. A first sealing ring 25 is provided at the connection between the first semicircular pipe 21 and the second semicircular pipe 22. The first sealing ring 25 is made of high-temperature resistant silicone rubber to prevent hot water leakage at the connection. During operation, hot water flows in from the inlet pipe 26, passes through the first semicircular pipe 21 and the second semicircular pipe 22 in sequence, and finally exits from the outlet pipe 27. During the flow process, heat is transferred to the valve body 1 through the semicircular pipes, keeping the valve body 1 at a certain temperature and effectively preventing urea solution crystallization.

[0027] like Figure 8 As shown, to prevent the heat generated by the heating component 2 from spreading to the surrounding environment and causing energy waste, and to prevent the high temperature from affecting other surrounding equipment, heat insulation components 3 are provided on the first valve seat 11 and the second valve seat 12. The heat insulation component 3 includes a first semi-circular heat insulation frame 31 and a second semi-circular heat insulation frame 32, which are respectively fixedly installed on the first valve seat 11 and the second valve seat 12 by bolts. The heat insulation frames are made of lightweight and high-strength aluminum alloy, which can provide good support and reduce the overall weight.

[0028] The two ends of the first semicircular heat insulation frame 31 and the second semicircular heat insulation frame 32 are fixedly installed with bolts to form a complete annular heat insulation structure, which encloses the heating component 2 inside. Heat insulation plates 33 are fixedly installed on the inner walls of both the first semicircular heat insulation frame 31 and the second semicircular heat insulation frame 32. The heat insulation plates 33 are semicircular and made of high-temperature resistant aluminum silicate fiberboard, which has excellent heat insulation performance. It can effectively isolate the heat of the heating component 2, reduce heat loss, improve energy utilization, and protect surrounding equipment from high temperatures.

[0029] Working principle: When it is necessary to control the flow of urea solution, the operator rotates the handle 7 at the upper end of the valve stem 4. The valve stem 4 drives the valve core 5 to rotate synchronously through the locking structure with the limiting groove of the valve core 5. Since the valve core 5 is tightly fitted with the inner walls of the first valve seat 11 and the second valve seat 12, when the valve core 5 is rotated to the fully open position, the urea solution can smoothly pass through the internal channel of the valve body 1; when rotated to the closed position, the valve core 5 blocks the channel, thus stopping the flow of urea solution. During this process, the EDC wear-resistant hard coating on the inner wall of the valve core 5 and the valve seat plays a role in resisting the erosion and corrosion of the urea solution and extending the service life of the components.

[0030] In low-temperature environments, heating element 2 is activated to prevent urea crystallization. Hot water flows from inlet pipe 26 into the first semi-circular pipe 21, passes through the sealing connection structure of the locking block 23 and the locking groove 24, enters the second semi-circular pipe 22, and finally exits from outlet pipe 27. The copper semi-circular pipes efficiently transfer heat to the valve body 1, and the annular heating pipe design ensures that the valve body 1 is heated evenly, maintaining a suitable temperature to avoid crystallization. The first sealing ring 25 prevents hot water leakage and ensures heating efficiency.

[0031] Meanwhile, the heat insulation component 3 plays a role in heat preservation and protection. The first semi-circular heat insulation frame 31 and the second semi-circular heat insulation frame 32, made of aluminum alloy, form a ring structure to wrap around the heating component 2. The aluminum silicate fiber heat insulation board 33 on its inner wall effectively blocks heat diffusion, reduces energy waste, and avoids the impact of high temperature on surrounding equipment.

[0032] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A ball valve for urea, characterized in that: include Valve body (1), the valve body (1) includes a first valve seat (11) and a second valve seat (12); A heating assembly (2) is installed on the first valve seat (11) and the second valve seat (12). The heating assembly (2) includes a first semi-circular tube (21) and a second semi-circular tube (22) respectively installed on the first valve seat (11) and the second valve seat (12). The outer walls of the first valve seat (11) and the second valve seat (12) are provided with mounting grooves (28). The first semi-circular tube (21) and the second semi-circular tube (22) can be snapped into the mounting grooves (28). A locking block (23) is installed at the other end of the first semi-circular tube (21). A locking groove (24) is opened at the other end of the second semi-circular tube (22). The locking block (23) is snapped into the locking groove (24). The heat insulation component (3) is mounted on the first valve seat (11) and the second valve seat (12).

2. The ball valve for urea according to claim 1, characterized in that: One end of the first semicircular tube (21) is equipped with an inlet pipe (26), and one end of the second semicircular tube (22) is equipped with an outlet pipe (27).

3. A ball valve for urea according to claim 2, characterized in that: A first sealing ring (25) is provided between the first semicircular tube (21) and the second semicircular tube (22).

4. A ball valve for urea according to claim 1, characterized in that: The heat insulation component (3) includes a first semicircular heat insulation frame (31) and a second semicircular heat insulation frame (32) respectively installed on the first valve seat (11) and the second valve seat (12). The two ends of the first semicircular heat insulation frame (31) and the second semicircular heat insulation frame (32) are fixedly installed by bolts. The inner walls of the first semicircular heat insulation frame (31) and the second semicircular heat insulation frame (32) are both equipped with heat insulation plates (33).

5. A ball valve for urea according to claim 4, characterized in that: The heat insulation board (33) is made of high-temperature resistant aluminum silicate fiber board.

6. A ball valve for urea according to claim 1, characterized in that: The first valve seat (11) and the second valve seat (12) are provided with valve cores (5) inside. The upper ends of the first valve seat (11) and the second valve seat (12) are provided with valve stems (4). When the first valve seat (11) and the second valve seat (12) are installed in correspondence, the upper ends of the first valve seat (11) and the second valve seat (12) form a channel for installing valve stems (4). The valve stems (4) are rotatably installed in the channel formed between the first valve seat (11) and the second valve seat (12). The valve core (5) is provided with a limiting groove. The valve stems (4) are snapped into the limiting groove on the valve core (5). The upper end of the valve stems (4) is fixedly installed with a handle (7). The interior of the first valve seat (11) and the second valve seat (12) and the outer and inner walls of the valve core (5) are all provided with wear-resistant hard coatings. The wear-resistant hard coatings are EDC coatings.

7. A ball valve for urea according to claim 6, characterized in that: A second sealing ring (6) is provided between the first valve seat (11) and the second valve seat (12), and the first valve seat (11) and the second valve seat (12) are fixedly installed by bolts.

Images