High-pressure check valve for urea
By introducing a pressure relief and flow diversion structure into the high-pressure check valve for urea, the problem of valve damage under high pressure is solved, achieving safe and reliable pressure regulation and extending equipment life.
Patent Information
- Application Number
- CN202422713075.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-07
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-11-07
AI Technical Summary
Existing high-pressure check valves for urea production are prone to damage when subjected to high pressure, which may lead to equipment explosion or leakage, posing safety hazards and affecting smooth production.
A high-pressure check valve for urea was designed. By installing a pressure relief valve, a three-way valve and a one-way valve in the valve body, the three-way valve is used to transport the urea solution to the storage tank for pressure relief, and the urea solution enters the outlet through the one-way valve when the pressure decreases. Combined with a cross-shaped flow divider and a nitrile rubber guide block, the fluid is evenly distributed, reducing impact and wear.
It effectively regulates pressure, extends valve life, improves equipment safety and sealing, and avoids equipment damage and production disruptions.
Smart Images
Figure CN223648632U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to check valve technical field especially relates to high pressure check valve for urea. BACKGROUND
[0002] Urea is an important organic compound, is the important component of nitrogen cycle in the nature, it has extensive application in industry, agriculture and pharmaceutical field, check valve is the key valve in the urea production process, is used for controlling the flow direction of urea solution, prevents the backflow, ensures the smooth and safety of production process.
[0003] There are still some problems in the existing high pressure check valve for urea during use, when using, need to bear the larger pressure, system pressure exceeds the design limit, can lead to check valve or other system component damage, need expensive repair or replacement, too high pressure can lead to equipment explosion or leakage, causes serious safety accident, therefore, the technical personnel in the field provides high pressure check valve for urea to solve the problems in the above background art. SUMMARY
[0004] The utility model discloses a high pressure check valve for urea is provided to solve the problems in the above background art, when bearing the larger pressure, a part of urea solution in the valve body is discharged through the pressure relief valve, the output end is adjusted through the three-way valve, and the urea solution is transported to the storage tank inside storage, pressure relief is carried out, when the pressure reduces, the storage tank is connected with the check valve again by adjusting the three-way valve, the urea solution enters the outlet through the check valve, and the pressure is adjusted conveniently, and the production is not affected.
[0005] To achieve the above object, the utility model provides the following technical scheme: high pressure check valve for urea, including valve body, outlet and inlet, the inlet is arranged on the lower end surface of valve body, the outlet is arranged on the upper side wall center of valve body, the upper end surface of valve body is equipped with the top seat, the first storage groove is set up in the lower edge of the top seat lower end surface, the second storage groove is arranged on the upper end surface of valve body below the first storage groove lower end, the first storage groove and second storage groove are equipped with sealing structure inside, the upper end surface of top seat is equipped with pressure regulating structure, the center of top seat lower end surface is fixedly connected with base, the spring is sleeved with the lower part of the outer side wall of base, the valve core is equipped with the lower end of spring, the valve core lower end is equipped with the shunt structure;
[0006] Through the shunt structure, the urea solution is shunted, the impact is reduced, the service life of the valve body and the valve core is increased, the sealing property between the top seat and the valve body is increased by the sealing structure, the pressure is relieved when the pressure is high, and the safety of the equipment is improved.
[0007] Further, the pressure regulating structure comprises a pressure relief valve, a three-way valve and a check valve, the pressure relief valve is arranged at the center of the upper end surface of the top base, the three-way valve is arranged on the output end of the pressure relief valve, and the check valve is arranged on the other output end of the three-way valve.
[0008] Through the above technical scheme, when a larger pressure is borne, a part of the urea solution in the valve body is discharged through the pressure relief valve, the three-way valve is adjusted on the output end, the urea solution is transported to the storage tank for storage, and pressure relief is performed.
[0009] Further, the flow splitting structure comprises a flow splitting plate and a guide block, the guide block is arranged on the lower end surface of the flow splitting plate, and the flow splitting plate is a cross-shaped plate.
[0010] Through the above technical scheme, the cross-shaped flow splitting plate can uniformly distribute the fluid to each part of the valve body, reduce the impact of the fluid on the valve core, thereby reducing wear and prolonging the service life of the valve.
[0011] Further, the material of the guide block is nitrile rubber.
[0012] Through the above technical scheme, the nitrile rubber has good resistance to urea solution and will not be significantly chemically degraded due to long-term contact, has good wear resistance and increases the service life.
[0013] Further, the sealing structure comprises a first sealing gasket, a first corrugated groove, a second sealing gasket and a second corrugated groove, the first sealing gasket is arranged in the second storage groove, the first corrugated groove is arranged on the upper end surface of the first sealing gasket, the second sealing gasket is arranged in the first storage groove, the second corrugated groove is arranged on the lower end surface of the second sealing gasket, and the first corrugated groove and the second corrugated groove are in close contact with each other.
[0014] Through the above technical scheme, the close contact between the first corrugated groove and the second corrugated groove increases the contact area between the first sealing gasket and the second sealing gasket, thereby increasing the sealing property between the top base and the valve body.
[0015] The utility model has the advantages of the following beneficial effects:
[0016] 1. The utility model discloses a high pressure check valve for urea is connected with a storage tank in another output end of three -way valve, when bears greater pressure, part urea solution in the valve body is discharged through pressure relief valve, the output end is adjusted through three -way valve, and urea solution is transported to the storage in storage tank and stores up, and when pressure reduces, adjust three -way valve again, and the storage tank is connected with check valve, and urea solution passes through check valve and enters the export, convenient for adjusting pressure, simultaneously, will not influence production.
[0017] 2. The utility model discloses when installing the top seat, through mutual adhesion between the first corrugated groove and the second corrugated groove, then the top seat is fixed through bolt, and the first corrugated groove and the second corrugated groove adhesion increase the contact area between the first sealing washer and the second sealing washer, thereby increasing the sealing property between the top seat and the valve body.
[0018] 3. The utility model discloses through the cross -shaped flow divider, can evenly distribute fluid to each part of the valve body, reduce the impact of fluid to the valve core, thereby reduce the wear and tear and prolong the service life of the valve, also guide through the guide block of butyronitrile rubber material, also reduce the impact to the flow divider, and butyronitrile rubber has good resistance to urea solution, will not take place the significant chemical degradation because of long -term contact, has good wear -resisting ability, increases the service life. DRAWINGS
[0019] Figure 1 It is the perspective drawing of high pressure check valve for urea that the utility model proposes;
[0020] Figure 2 It is the perspective sectional view of high pressure check valve for urea that the utility model proposes;
[0021] Figure 3 It is the perspective drawing of another view angle of flow distribution structure of high pressure check valve for urea that the utility model proposes;
[0022] Figure 4 It is Figure 2 The enlarged view of A in the figure.
[0023] Legend:
[0024] 1, valve body;2, export;3, pressure regulating structure;301, pressure relief valve;302, three -way valve;303, check valve;4, top seat;5, inlet;6, base;7, spring;8, valve core;9, flow distribution structure;901, flow divider;902, guide block;10, first storage groove;11, sealing structure;1101, first sealing washer;1102, first corrugated groove;1103, second sealing washer;1104, second corrugated groove;12, second storage groove. DETAILED DESCRIPTION
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] Reference Figures 1-4 This utility model provides an embodiment of a high-pressure check valve for urea, comprising a valve body 1, an outlet 2, and an inlet 5. The inlet 5 is located on the lower end face of the valve body 1, and the outlet 2 is located at the upper center of one side wall of the valve body 1. A top seat 4 is provided on the upper end face of the valve body 1, and a first storage groove 10 is provided at the edge of the lower end face of the top seat 4. A second storage groove 12 is provided on the upper end face of the valve body 1 below the first storage groove 10. A sealing structure 11 is provided inside the first storage groove 10 and the second storage groove 12, which further enhances the sealing between the top seat 4 and the valve body 1. A pressure regulating structure 3 is provided on the upper end face of the top seat 4, which releases pressure under high pressure to improve the safety of equipment use. A base 6 is fixedly connected to the center of the lower end face of the top seat 4, and a spring 7 is sleeved on the lower outer wall of the base 6. A valve core 8 is provided at the lower end of the spring 7, and a flow diversion structure 9 is provided at the lower end of the valve core 8. The flow diversion structure 9 diverts the urea solution, reduces impact, and increases the service life of the valve body 1 and the valve core 8.
[0027] The pressure regulating structure 3 includes a pressure relief valve 301, a three-way valve 302, and a one-way valve 303. The pressure relief valve 301 is located on one side of the center of the upper end face of the top seat 4. The three-way valve 302 is located on the output end of the pressure relief valve 301, and the one-way valve 303 is located on the other output end of the three-way valve 302. The output end of the one-way valve 303 passes through the upper end face of the outlet 2 and connects to the upper inner wall of the outlet 2. A storage tank is connected to the other output end of the three-way valve 302. When subjected to greater pressure, a portion of the urea solution inside the valve body 1 is discharged through the pressure relief valve 301. The output end of the three-way valve 302 is adjusted to transport the urea solution into the storage tank for storage, thereby relieving pressure.
[0028] The flow distribution structure 9 includes a flow distribution plate 901 and a guide block 902. The guide block 902 is disposed on the lower end face of the flow distribution plate 901. The flow distribution plate 901 is a cross-shaped plate. The cross-shaped flow distribution plate 901 can evenly distribute the fluid to various parts of the valve body 1, reducing the impact of the fluid on the valve core 8, thereby reducing wear and extending the service life of the valve. The guide block 902 guides the fluid, which also reduces the impact on the flow distribution plate 901 and increases the service life of the flow distribution plate 901. The guide block 902 is made of nitrile rubber. Nitrile rubber has good resistance to urea solution and will not undergo significant chemical degradation due to long-term contact. It has good wear resistance and increases service life.
[0029] The sealing structure 11 includes a first sealing gasket 1101, a first corrugated groove 1102, a second sealing gasket 1103, and a second corrugated groove 1104. The first sealing gasket 1101 is disposed inside the second storage tank 12, the first corrugated groove 1102 is disposed on the upper end surface of the first sealing gasket 1101, the second sealing gasket 1103 is disposed inside the first storage tank 10, and the second corrugated groove 1104 is disposed on the lower end surface of the second sealing gasket 1103. The first corrugated groove 1102 and the second corrugated groove 1104 are in close contact with each other. The close contact between the first corrugated groove 1102 and the second corrugated groove 1104 increases the contact area between the first sealing gasket 1101 and the second sealing gasket 1103, thereby increasing the sealing performance between the top seat 4 and the valve body 1.
[0030] Working principle: When installing the top seat 4, the first corrugated groove 1102 and the second corrugated groove 1104 fit together, and the top seat 4 is fixed with bolts. The fit between the first corrugated groove 1102 and the second corrugated groove 1104 increases the contact area between the first sealing gasket 1101 and the second sealing gasket 1103, thereby increasing the sealing performance between the top seat 4 and the valve body 1. The cross-shaped flow divider 901 can evenly distribute the fluid to various parts of the valve body 1, reducing the impact of the fluid on the valve core 8, thereby reducing wear and extending the service life of the valve. The guide block 902 made of nitrile rubber guides the fluid, which also reduces the impact on the flow divider 901. Nitrile rubber has good resistance to urea solution and will not undergo significant chemical degradation due to long-term contact. It has good wear resistance and increases service life.
[0031] A storage tank is connected to the other output end of the three-way valve 302. When subjected to greater pressure, a portion of the urea solution inside the valve body 1 is discharged through the pressure relief valve 301. The output end of the three-way valve 302 is adjusted to transport the urea solution into the storage tank for storage and pressure relief. When the pressure decreases, the three-way valve 302 is adjusted again to connect the storage tank to the check valve 303. The urea solution enters the outlet 2 through the check valve 303, which facilitates pressure adjustment without affecting production.
[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A high-pressure check valve for urea, comprising a valve body (1), an outlet (2), and an inlet (5), wherein the inlet (5) is disposed on the lower end face of the valve body (1), and the outlet (2) is disposed near the upper center of one side wall of the valve body (1), characterized in that: The valve body (1) has a top seat (4) on its upper end face. The bottom end face of the top seat (4) has a first storage groove (10) near the edge. The valve body (1) at the lower end of the first storage groove (10) has a second storage groove (12) on its upper end face. The first storage groove (10) and the second storage groove (12) have a sealing structure (11) inside. The top seat (4) has a pressure regulating structure (3) on its upper end face. The bottom end face of the top seat (4) has a base (6) fixedly connected to the center of the bottom end face of the top seat (4). The bottom end of the outer wall of the base (6) has a spring (7) sleeved on it. The bottom end of the spring (7) has a valve core (8). The bottom end of the valve core (8) has a flow diversion structure (9).
2. The high-pressure check valve for urea according to claim 1, characterized in that: The pressure regulating structure (3) includes a pressure relief valve (301), a three-way valve (302) and a one-way valve (303). The pressure relief valve (301) is located on one side of the center of the upper end face of the top seat (4). The three-way valve (302) is located on the output end of the pressure relief valve (301). The one-way valve (303) is located on the other output end of the three-way valve (302). The output end of the one-way valve (303) passes through the upper end face of the outlet (2) and extends to the upper inner wall of the outlet (2).
3. The high-pressure check valve for urea according to claim 1, characterized in that: The diversion structure (9) includes a diversion plate (901) and a guide block (902). The guide block (902) is disposed on the lower end surface of the diversion plate (901). The diversion plate (901) is a cross-shaped plate.
4. The high-pressure check valve for urea according to claim 3, characterized in that: The guide block (902) is made of nitrile rubber.
5. The high-pressure check valve for urea according to claim 1, characterized in that: The sealing structure (11) includes a first sealing gasket (1101), a first corrugated groove (1102), a second sealing gasket (1103), and a second corrugated groove (1104). The first sealing gasket (1101) is disposed inside the second storage tank (12). The first corrugated groove (1102) is disposed on the upper end surface of the first sealing gasket (1101). The second sealing gasket (1103) is disposed inside the first storage tank (10). The second corrugated groove (1104) is disposed on the lower end surface of the second sealing gasket (1103). The first corrugated groove (1102) and the second corrugated groove (1104) are in contact with each other.