High temperature and high pressure pilot operated safety valve

Abstract

This utility model provides a high-temperature and high-pressure pilot-operated safety valve, belonging to the field of pilot-operated safety valve technology. It includes a main valve body and a pilot valve, the pilot valve being fixedly connected to the main valve body via a conduit. This utility model uses a stirring shaft with blades fixedly mounted on its surface, rotatably connected inside the water inlet pipe. When water flows in, it pushes the blades to rotate the stirring shaft, which agitates the water flow and breaks up large debris. This, combined with a filter plate inside the filter box, blocks impurities, preventing large debris from clogging the pipe or adhering to the valve core and causing damage. The design of the limiting rod, limiting hole, limiting disc, and tension spring facilitates quick disassembly and replacement of the filter plate. Furthermore, by sliding the positioning block on the side of the outlet flange into the positioning groove of the connecting sleeve and rotating the fixing rod to screw it into the fixing hole of the positioning block, quick positioning and installation of the outlet flange and the connecting sleeve are achieved. Simultaneously, when the flange is damaged or needs to be replaced with a flange of a different interface standard, it can be replaced.

Description

Technical Field

[0001] This utility model relates to the field of pilot-operated safety valve technology, and in particular to a high-temperature and high-pressure pilot-operated safety valve. Background Technology

[0002] A pilot-operated safety valve is a safety pressure relief device that uses the system medium pressure to drive the main valve to open and close. It is widely used in the safety protection of high-temperature and high-pressure systems. Its working principle is that the pilot valve senses changes in system pressure and controls the opening and closing of the main valve, thereby achieving precise control and rapid pressure relief of the system, ensuring the safety of equipment and personnel.

[0003] In existing technologies, safety valves lack filtration at the inlet, failing to filter water inside the pipeline. This can easily damage the valve core. Furthermore, traditional pilot-operated safety valves often employ an integral design, particularly at the outlet flange, where the flange is typically cast or welded to the main valve body. While this improves structural strength and sealing performance to some extent, in practical applications, when the outlet flange needs replacement due to media corrosion, sealing surface damage, or mismatched connection methods, the traditional integrated structure cannot replace the flange component alone. The entire safety valve must be replaced, resulting in high maintenance costs and long downtime, necessitating improvements. Utility Model Content

[0004] The purpose of this invention is to address the problems in existing technologies, such as the lack of filtration function, the inability to filter water in pipelines, the easy damage to valve cores, and the fact that traditional pilot-operated safety valves often have integral outlet flanges. When the flange needs to be replaced due to corrosion, damage to the sealing surface, or mismatch in connection, the entire safety valve needs to be replaced, resulting in high maintenance costs. Therefore, this invention proposes a high-temperature and high-pressure pilot-operated safety valve.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a high-temperature and high-pressure pilot-operated safety valve, comprising a main valve body and a pilot valve, wherein the pilot valve is fixedly connected to the main valve body via a conduit; a filter box is fixedly installed on the lower end face of the main valve body; an inlet pipe is fixedly connected to the lower surface of the filter box; an inlet flange is fixedly installed on the end face of the inlet pipe; an outlet pipe is fixedly installed on the side of the main valve body; a connecting sleeve is fixedly installed on the end face of the outlet pipe; an outlet flange is provided on the side of the connecting sleeve; a filter plate is provided inside the filter box; a stirring shaft is rotatably connected inside the inlet pipe; and blades are fixedly installed on the surface of the stirring shaft. A sealing gasket is provided between the filter plate and the filter box. A protrusion is fixedly installed on the side of the filter plate. A groove is opened on the side of the filter box. An installation sleeve is fixedly installed on the side of the filter box. A limit rod is slidably connected inside the installation sleeve. A limit hole is opened on the side of the protrusion. A limit plate is fixedly installed on the surface of the limit rod. A tension spring is sleeved on the surface of the limit rod. A positioning block is fixedly installed on the side of the outlet flange. A positioning groove is opened on the side of the connecting sleeve. A fixing hole is opened on the side of the positioning block. A fixing rod is threadedly connected to the side of the connecting sleeve. A second sealing gasket is provided between the outlet flange and the connecting sleeve.

[0006] Preferably, the protrusion and the groove are slidably connected, and there are two sets of sealing gaskets, which are located on both sides of the filter plate.

[0007] Preferably, the limiting rod and the limiting hole are slidably connected, and there are two sets of each of the limiting rod, limiting hole, limiting plate and tension spring.

[0008] Preferably, one end of the tension spring is fixedly connected to the side of the limiting plate, and the other end of the tension spring is fixedly connected to the inner side of the mounting sleeve.

[0009] Preferably, the positioning block and the positioning groove are slidably connected, and there are four sets of positioning blocks, positioning grooves and fixing rods.

[0010] Preferably, the fixing rod is threadedly connected to the fixing hole.

[0011] Preferably, a reinforcing plate is fixedly installed on the side of the main valve body, and a reinforcing screw is fixedly installed on the side of the outlet flange, with a reinforcing nut threaded onto the surface of the reinforcing screw.

[0012] Preferably, the reinforcing screw and the reinforcing plate are slidably connected, and the number of the reinforcing plate, the reinforcing screw, and the reinforcing nut are all provided in three sets.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. In this utility model, blades are fixedly installed on the surface of the stirring shaft that is rotatably connected inside the water inlet pipe. When water flows in, it pushes the blades to drive the stirring shaft to rotate. The stirring shaft agitates the water flow and breaks up large pieces of debris. This, together with the filter plate set in the filter box, blocks impurities and prevents large pieces of debris from clogging the pipe or adhering to the valve core, thus preventing damage to the valve core. The design of the limit rod, limit hole, limit plate, and tension spring facilitates the quick disassembly and replacement of the filter plate. Furthermore, the positioning block on the side of the outlet flange is slid into the positioning groove of the connecting sleeve, and the fixing rod is rotated to screw it into the fixing hole of the positioning block, realizing the quick positioning and installation of the outlet flange and the connecting sleeve. At the same time, when the flange is damaged or needs to be replaced with a flange of a different interface standard, it can be replaced.

[0015] 2. In this utility model, the reinforcing plate on the side of the main valve body is slidably connected to the reinforcing screw on the side of the outlet flange. The reinforcing nut on the surface of the reinforcing screw is tightened to make the reinforcing plate and the outlet flange fit tightly. The three sets of reinforcing structures improve the stability and pressure resistance of the flange connection and prevent loosening under high temperature and high pressure conditions. Attached Figure Description

[0016] Figure 1 A three-dimensional structural diagram of a high-temperature and high-pressure pilot-operated safety valve is provided for this utility model.

[0017] Figure 2 A bottom view of a high-temperature and high-pressure pilot-operated safety valve is provided for this utility model;

[0018] Figure 3 This utility model provides a partial structural diagram of the filter box, filter plate, and limiting rod of a high-temperature and high-pressure pilot-operated safety valve;

[0019] Figure 4 This invention provides an exploded view of the outlet flange and sealing gasket of a high-temperature and high-pressure pilot-operated safety valve.

[0020] Legend: 1. Main valve body; 2. Pilot valve; 3. Guide pipe; 4. Filter box; 5. Inlet pipe; 6. Inlet flange; 7. Outlet pipe; 8. Connecting sleeve; 9. Outlet flange; 10. Filter plate; 11. Stirring shaft; 12. Blade; 13. Sealing gasket one; 14. Protrusion; 15. Groove; 16. Mounting sleeve; 17. Limiting rod; 18. Limiting hole; 19. Limiting disc; 20. Tension spring; 21. Positioning block; 22. Positioning groove; 23. Fixing hole; 24. Fixing rod; 25. Sealing gasket two; 26. Reinforcing plate; 27. Reinforcing screw; 28. Reinforcing nut. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1: As Figures 1-4 As shown, this utility model provides a technical solution: a high-temperature and high-pressure pilot-operated safety valve, including a main valve body 1 and a pilot valve 2. The pilot valve 2 is fixedly connected to the main valve body 1 via a conduit 3. A filter box 4 is fixedly installed on the lower end face of the main valve body 1. An inlet pipe 5 is fixedly connected to the lower surface of the filter box 4. An inlet flange 6 is fixedly installed on the end face of the inlet pipe 5. An outlet pipe 7 is fixedly installed on the side of the main valve body 1. A connecting sleeve 8 is fixedly installed on the end face of the outlet pipe 7. An outlet flange 9 is provided on the side of the connecting sleeve 8. The filter box 4 contains a filter plate 10. An agitator shaft 11 is rotatably connected to the inside of the inlet pipe 5. Blades 12 are fixedly mounted on the surface of the agitator shaft 11. A sealing gasket 13 is provided between the filter plate 10 and the filter box 4. A protrusion 14 is fixedly mounted on the side of the filter plate 10. A groove 15 is formed on the side of the filter box 4. An installation sleeve 16 is fixedly mounted on the side of the installation sleeve 16. A limit rod 17 is slidably connected inside the installation sleeve 16. A limit hole 18 is formed on the side of the protrusion 14. A limit disc 19 is fixedly mounted on the surface of the limit rod 17. A tension spring 20 is sleeved on the surface of the limit rod 17. A positioning block 21 is fixedly mounted on the side of the outlet flange 9. A positioning groove 22 is formed on the side of the connecting sleeve 8. A fixing hole 23 is formed on the side of the positioning block 21. A fixing rod 24 is threadedly connected to the side of the connecting sleeve 8. A second sealing gasket 25 is provided between the outlet flange 9 and the connecting sleeve 8. The protrusion 14 and the groove 15 are slidably connected. There are two sets of sealing gaskets 13, located on the filter plate 10. On both sides, the limiting rod 17 is slidably connected to the limiting hole 18. There are two sets of limiting rod 17, limiting hole 18, limiting plate 19 and tension spring 20. One end of tension spring 20 is fixedly connected to the side of limiting plate 19 and the other end of tension spring 20 is fixedly connected to the inner side of mounting sleeve 16. The positioning block 21 is slidably connected to the positioning groove 22. There are four sets of positioning block 21, positioning groove 22 and fixing rod 24. The fixing rod 24 is threadedly connected to fixing hole 23.

[0024] In this embodiment, blades 12 are fixedly installed on the surface of the stirring shaft 11, which is rotatably connected inside the water inlet pipe 5. When water flows in, it pushes the blades 12 to drive the stirring shaft 11 to rotate. The stirring shaft 11 agitates the water flow and breaks up large pieces of debris. This, together with the filter plate 10 set in the filter box 4, blocks impurities and prevents large pieces of debris from clogging the pipe or adhering to the valve core, thus preventing damage to the valve core. The design of the limiting rod 17, limiting hole 18, limiting plate 19, and tension spring 20 facilitates the quick disassembly and replacement of the filter plate 10. Furthermore, the positioning block 21 on the side of the outlet flange 9 is slid into the positioning groove 22 of the connecting sleeve 8, and the fixing rod 24 is rotated to screw it into the fixing hole 23 of the positioning block 21, realizing the quick positioning and installation of the outlet flange 9 and the connecting sleeve 8. At the same time, when the flange is damaged or needs to be replaced with a flange of a different interface standard, it can be replaced.

[0025] Example 2: Figures 1-4 As shown, a reinforcing plate 26 is fixedly installed on the side of the main valve body 1, and a reinforcing screw 27 is fixedly installed on the side of the outlet flange 9. A reinforcing nut 28 is threadedly connected to the surface of the reinforcing screw 27. The reinforcing screw 27 and the reinforcing plate 26 are slidably connected. There are three sets of each of the reinforcing plate 26, the reinforcing screw 27 and the reinforcing nut 28.

[0026] In this embodiment, the reinforcing plate 26 on the side of the main valve body 1 is slidably connected to the reinforcing screw 27 on the side of the outlet flange 9. The reinforcing nut 28 on the surface of the reinforcing screw 27 is tightened to make the reinforcing plate 26 fit tightly with the outlet flange 9. The three sets of reinforcing structures improve the stability and pressure resistance of the flange connection and prevent loosening under high temperature and high pressure conditions.

[0027] The working principle of this embodiment is as follows: In use, the operator first connects the inlet flange 6 to the system pipeline, so that the medium enters the filter box 4 through the water inlet pipe 5. When the water flows into the water inlet pipe 5, it pushes the blades 12 on the surface of the stirring shaft 11 to rotate, which drives the stirring shaft 11 to rotate and stir the water flow, breaking up any large debris that may be mixed in the water, reducing the risk of impurity blockage. The water flow that has undergone preliminary treatment continues to enter the filter box 4, where the filter plate 10 further blocks and filters out the small impurities, preventing impurities from adhering to the valve core and affecting the sealing performance and service life of the main valve. The filter plate 10 is slidably installed by the side protrusions 14 and the grooves 15 on the filter box 4, achieving quick positioning. After installation, the operator inserts the limiting rod 17 into the limiting hole 18 on the protrusion 14. The limiting plate 19, under the action of the tension spring 20, presses the limiting rod 17 tightly, thus achieving a stable fixation of the filter plate 10. When it is necessary to replace or clean the filter plate 10, simply pull the limiting rod 17 outward to disengage it from the limiting hole 18, and the filter plate 10 can be removed from the filter box 4. The operation is simple and the maintenance efficiency is high. At the outlet end of the main valve body 1, the operator slides the outlet flange 9 into the positioning groove 22 of the connecting sleeve 8 through the positioning block 21. After completing the initial positioning, the four sets of fixing rods 24 are screwed into the fixing holes 23 on the positioning block 21, so that the outlet flange 9 and the connecting sleeve 8 are aligned. A stable connection is achieved between the outlet flange 9 and the connecting sleeve 8. The sealing gasket 25 is placed between the outlet flange 9 and the connecting sleeve 8 to ensure the sealing performance of the connection. When it is necessary to replace the outlet flange 9 with a different interface standard, simply loosen the fixing rod 24 to disassemble and replace the outlet flange 9, which improves the adaptability and maintainability of the equipment. In addition, three sets of reinforcing plates 26 are provided on the side of the main valve body 1. A reinforcing screw 27 is fixedly connected to the outlet flange 9. After the operator passes the reinforcing screw 27 through the reinforcing plate 26, he tightens the reinforcing nut 28 to make the connection between the outlet flange 9 and the main valve body 1 more secure, enhance the pressure resistance and vibration resistance of the flange connection, and prevent loosening or leakage under high temperature and high pressure conditions.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A high-temperature and high-pressure pilot-operated safety valve, comprising a main valve body (1) and a pilot valve (2), characterized in that: The pilot valve (2) is fixedly connected to the main valve body (1) through the conduit (3). A filter box (4) is fixedly installed on the lower end face of the main valve body (1). A water inlet pipe (5) is fixedly connected to the lower surface of the filter box (4). An inlet flange (6) is fixedly installed on the end face of the water inlet pipe (5). A water outlet pipe (7) is fixedly installed on the side of the main valve body (1). A connecting sleeve (8) is fixedly installed on the end face of the water outlet pipe (7). An outlet flange (9) is provided on the side of the connecting sleeve (8). A filter plate (10) is provided inside the filter box (4). A stirring shaft (11) is rotatably connected inside the water inlet pipe (5). Blades (12) are fixedly installed on the surface of the stirring shaft (11). A sealing gasket (13) is provided between the filter plate (10) and the filter box (4). The side of the filter plate (10) A protrusion (14) is fixedly installed. A groove (15) is provided on the side of the filter box (4). An installation sleeve (16) is fixedly installed on the side of the filter box (4). A limit rod (17) is slidably connected inside the installation sleeve (16). A limit hole (18) is provided on the side of the protrusion (14). A limit plate (19) is fixedly installed on the surface of the limit rod (17). A tension spring (20) is sleeved on the surface of the limit rod (17). A positioning block (21) is fixedly installed on the side of the outlet flange (9). A positioning groove (22) is provided on the side of the connecting sleeve (8). A fixing hole (23) is provided on the side of the positioning block (21). A fixing rod (24) is threadedly connected to the side of the connecting sleeve (8). A sealing gasket (25) is provided between the outlet flange (9) and the connecting sleeve (8).

2. The high-temperature and high-pressure pilot-operated safety valve according to claim 1, characterized in that: The protrusion (14) and the groove (15) are slidably connected, and there are two sets of sealing gaskets (13), which are located on both sides of the filter plate (10).

3. The high-temperature and high-pressure pilot-operated safety valve according to claim 1, characterized in that: The limiting rod (17) is slidably connected to the limiting hole (18), and the limiting rod (17), the limiting hole (18), the limiting plate (19) and the tension spring (20) are all provided in two sets.

4. The high-temperature and high-pressure pilot-operated safety valve according to claim 1, characterized in that: One end of the tension spring (20) is fixedly connected to the side of the limiting plate (19), and the other end of the tension spring (20) is fixedly connected to the inside of the mounting sleeve (16).

5. The high-temperature and high-pressure pilot-operated safety valve according to claim 1, characterized in that: The positioning block (21) and the positioning groove (22) are slidably connected, and the number of positioning blocks (21), positioning grooves (22) and fixing rods (24) are all provided in four sets.

6. The high-temperature and high-pressure pilot-operated safety valve according to claim 1, characterized in that: The fixing rod (24) is threadedly connected to the fixing hole (23).

7. The high-temperature and high-pressure pilot-operated safety valve according to claim 1, characterized in that: A reinforcing plate (26) is fixedly installed on the side of the main valve body (1), and a reinforcing screw (27) is fixedly installed on the side of the outlet flange (9). A reinforcing nut (28) is threaded onto the surface of the reinforcing screw (27).

8. The high-temperature and high-pressure pilot-operated safety valve according to claim 7, characterized in that: The reinforcing screw (27) is slidably connected to the reinforcing plate (26), and the number of the reinforcing plate (26), the reinforcing screw (27) and the reinforcing nut (28) are all provided in three sets.

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