High-temperature and high-pressure safety valve with backpressure control sleeve

Abstract

The utility model relates to the technical field of safety valves, in particular to a high-temperature and high-pressure safety valve with a backpressure control sleeve, which comprises a valve body, a valve handle sleeve and a valve handle, the backpressure control sleeve is fixedly mounted at the top end of the valve handle sleeve, a threaded cylinder is fixedly mounted at the center of the top of the backpressure control sleeve, and a sliding disc is fixedly mounted at the top end of the valve handle. The sliding disc is slidably connected with the backpressure control sleeve, an upper protruding column is fixedly installed in the center of the top face of the sliding disc, a stud is in threaded connection with the interior of the threaded barrel, a lower pressing disc is fixedly installed at the bottom end of the stud, a spring is fixedly installed on the bottom face of the lower pressing disc, the upper protruding column is sleeved with the spring, and the bottom end of the spring abuts against the upper surface of the sliding disc. A left guide rod and a right guide rod are fixedly installed between the top wall and the bottom wall of the inner sliding cavity, and the sliding disc is in sliding connection with the guide rods. According to the safety valve, the deformation amount of the spring can be conveniently adjusted, the force needed when the safety valve is opened can be further adjusted, and use is convenient.

Description

Technical Field

[0001] This utility model relates to the field of safety valve technology, and more specifically, to a high-temperature and high-pressure safety valve with a back pressure control sleeve. Background Technology

[0002] High-temperature and high-pressure safety valves are critical devices used to protect equipment and systems in high-temperature and high-pressure environments. They play a vital role in various industries, such as oil refining units, natural gas processing, boiler systems, steam systems, power systems, and blast furnace systems. Equipment and pipelines in these industries often need to handle high-temperature and high-pressure fluids or gases. If the pressure exceeds the set value, it may cause safety accidents. Therefore, the existence of high-temperature and high-pressure safety valves is to ensure the stability and safety of the system and prevent accidents caused by excessive pressure.

[0003] Safety valves are equipped with a back pressure control sleeve, which is a sleeve-shaped device installed on the valve stem. Through its structural design, it can adjust the back pressure in the chamber above the valve disc, making the valve open and close more smoothly.

[0004] In commercially available safety valves, the back pressure control sleeve has a fixed structure and a fixed position for its internal spring. While the spring, when pressed against the corresponding part of the valve stem, can return to its original shape to close the valve core, this fixed position results in a constant upward force exerted by the valve stem on the spring. This means the degree of spring compression cannot be adjusted, and the force required to compress the spring cannot be adjusted, ultimately failing to provide the necessary force for opening the safety valve and affecting its performance. Therefore, we propose a high-temperature, high-pressure safety valve with a back pressure control sleeve. Utility Model Content

[0005] The purpose of this invention is to provide a high-temperature and high-pressure safety valve with a back pressure control sleeve to solve the defects mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A high-temperature and high-pressure safety valve with a back pressure control sleeve includes a valve body, a valve handle sleeve disposed on the top of the valve body, and a valve handle slidably connected to the valve handle sleeve. A back pressure control sleeve is fixedly installed on the top of the valve handle sleeve, and a threaded cylinder is fixedly installed at the center of the top of the back pressure control sleeve. A sliding plate is fixedly installed on the top of the valve handle, and the sliding plate is slidably connected to the back pressure control sleeve. An upper protrusion is fixedly installed at the center of the top surface of the sliding plate. A stud is internally threaded to the threaded cylinder, and a lower pressure plate is fixedly installed at the bottom end of the stud. A spring is fixedly installed on the bottom surface of the lower pressure plate, and the spring is sleeved on the upper protrusion. The bottom end of the spring abuts against the upper surface of the sliding plate.

[0008] Preferably, the back pressure control sleeve is provided with an inner sliding chamber, and the slide plate is located in the inner sliding chamber and is slidably connected to the inner sliding chamber.

[0009] Preferably, a hexagonal protrusion is fixedly installed at the top of the stud, and the cross-section of the hexagonal protrusion is hexagonal.

[0010] Preferably, two symmetrical guide rods are fixedly installed between the top and bottom walls of the inner sliding chamber, and the sliding plate is sleeved on the guide rods and slidably connected to the guide rods.

[0011] Preferably, the slide has two symmetrical guide holes on the left and right sides, and the guide rod passes through the guide holes.

[0012] Preferably, the back pressure control sleeve has an exposure hole on both the front and rear sides of the cylinder that communicates with the outside, and the exposure hole is elongated elliptical.

[0013] Preferably, the top surface of the back pressure control sleeve is threaded with two symmetrical fastening screws, which abut against the top surface of the lower pressure plate.

[0014] Preferably, both the inlet and outlet ends of the valve body are fixedly fitted with flanges, and a limit ring is fixedly fitted at the top of the threaded cylinder.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model uses a sliding plate that rests against the bottom of a spring. By rotating the stud, the spring can be compressed or extended. As the spring is compressed or extended, the force by which the valve handle moves upward to compress the spring changes, thereby adjusting the force required to open the valve core at the bottom of the valve handle. This achieves the effect of adjusting the force required to open the safety valve.

[0017] 2. The present invention uses a guide rod to guide the up-and-down movement of the slide, making the slide more stable when moving up and down. The fastening screws further fix the lower pressure plate after the position is adjusted. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0020] Figure 3 This is a cross-sectional view of the back pressure control sleeve of this utility model;

[0021] Figure 4 This is a partial structural schematic diagram of the present invention;

[0022] The meanings of the labels in the diagram are as follows:

[0023] 1. Valve body; 10. Valve handle sleeve; 11. Back pressure control sleeve; 111. Inner sliding chamber; 12. Guide rod; 13. Exposure hole; 14. Fastening screw; 15. Threaded cylinder; 151. Limiting ring; 16. Flange;

[0024] 2. Valve handle; 20. Slide plate; 21. Guide hole; 22. Upper protrusion;

[0025] 3. Stud; 30. Lower pressure plate; 31. Spring; 32. Hexagonal protrusion. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0027] Please see Figures 1-4This utility model provides a technical solution: a high-temperature and high-pressure safety valve with a back pressure control sleeve, comprising a valve body 1, a valve handle sleeve 10 disposed on the top of the valve body 1, and a valve handle 2 slidably connected to the valve handle sleeve 10. A back pressure control sleeve 11 is fixedly installed on the top of the valve handle sleeve 10, and a threaded cylinder 15 is fixedly installed at the center of the top of the back pressure control sleeve 11. A sliding plate 20 is fixedly installed on the top of the valve handle 2, and the sliding plate 20 is slidably connected to the back pressure control sleeve 11. An upper protruding post 22 is fixedly installed at the center of the top surface of the sliding plate 20. The threaded cylinder 15 is internally threaded with a stud 3. A lower pressure plate 30 is fixedly installed at the bottom end of the stud 3. A spring 31 is fixedly installed on the bottom surface of the lower pressure plate 30. The spring 31 is sleeved on the upper protrusion 22. The bottom end of the spring 31 abuts against the upper surface of the slide plate 20. This allows the compression deformation of the spring 31 to be adjusted by rotating the stud 3. As the compression deformation of the spring 31 is adjusted, the force by which the slide plate 20 presses the spring 31 upward can be adjusted, ultimately adjusting the force that pushes the valve core out when the safety valve is opened.

[0028] In this embodiment, an inner sliding chamber 111 is provided inside the back pressure control sleeve 11, and the slide plate 20 is located inside the inner sliding chamber 111 and is slidably connected to the inner sliding chamber 111, so that the slide plate 20 can slide up and down normally.

[0029] Specifically, a hexagonal protrusion 32 is fixedly installed on the top of the stud 3. The cross-section of the hexagonal protrusion 32 is hexagonal, which makes it easier to rotate the stud 3 by rotating the hexagonal protrusion 32.

[0030] Furthermore, two symmetrical guide rods 12 are fixedly installed between the top and bottom walls of the inner sliding chamber 111. The sliding plate 20 is sleeved on the guide rods 12 and slidably connected to the guide rods 12. The sliding plate 20 is provided with two symmetrical guide holes 21. The guide rods 12 pass through the guide holes 21, making the sliding plate 20 more stable and smooth when sliding up and down.

[0031] In addition, both the front and rear sides of the back pressure control sleeve 11 are provided with exposure holes 13 that communicate with the outside. The exposure holes 13 are elongated elliptical in shape and are used for observation and operation.

[0032] It is worth noting that there are two symmetrical fastening screws 14 on the top surface of the back pressure control sleeve 11. The fastening screws 14 abut against the top surface of the lower pressure plate 30, which further limits and fixes the lower pressure plate 30.

[0033] It is worth noting that flanges 16 are fixedly installed at both the inlet and outlet ends of the valve body 1. Flanges 16 are used for normal pipeline connection operations. A limit ring 151 is fixedly installed at the top of the threaded cylinder 15. The limit ring 151 is used to abut against the bottom surface of the hexagonal protrusion 32 for limit operation.

[0034] When using the high-temperature and high-pressure safety valve with back pressure control sleeve of this utility model, first loosen the fastening screw 14, then rotate the stud 3 clockwise or counterclockwise. As the stud 3 rotates, it can squeeze or move away from the spring 31, thereby compressing or relaxing the spring 31. As the spring 31 deforms, the force required to squeeze the spring 31 when the slide plate 20 moves upward with the valve handle 2 will also change, thereby adjusting the force that pushes the valve core out when the safety valve is opened. After the spring 31 is adjusted, continue to tighten the fastening screw 14 so that the end of the fastening screw 14 abuts against the top surface of the lower pressure plate 30 for limiting.

[0035] 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 in the specification are merely preferred examples and are not intended to limit the 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 the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-temperature and high-pressure safety valve with a back pressure control sleeve, comprising a valve body (1), a valve handle sleeve (10) disposed on the top of the valve body (1), and a valve handle (2) slidably connected to the valve handle sleeve (10), characterized in that: A back pressure control sleeve (11) is fixedly installed at the top of the valve handle sleeve (10). A threaded cylinder (15) is fixedly installed at the center of the top of the back pressure control sleeve (11). A sliding plate (20) is fixedly installed at the top of the valve handle (2). The sliding plate (20) and the back pressure control sleeve (11) are slidably connected. An upper protrusion (22) is fixedly installed at the center of the top surface of the sliding plate (20). A stud (3) is threadedly connected to the threaded cylinder (15). A lower pressure plate (30) is fixedly installed at the bottom end of the stud (3). A spring (31) is fixedly installed on the bottom surface of the lower pressure plate (30). The spring (31) is sleeved on the upper protrusion (22). The bottom end of the spring (31) abuts against the upper surface of the sliding plate (20).

2. The high-temperature and high-pressure safety valve with back pressure control sleeve according to claim 1, characterized in that: The back pressure control sleeve (11) is provided with an inner sliding chamber (111), and the slide plate (20) is located in the inner sliding chamber (111) and is slidably connected to the inner sliding chamber (111).

3. The high-temperature and high-pressure safety valve with back pressure control sleeve according to claim 1, characterized in that: The top of the stud (3) is fixedly installed with a hexagonal protrusion (32), and the cross-section of the hexagonal protrusion (32) is hexagonal.

4. The high-temperature and high-pressure safety valve with back pressure control sleeve according to claim 2, characterized in that: Two symmetrical guide rods (12) are fixedly installed between the top and bottom walls of the inner sliding chamber (111). The sliding plate (20) is sleeved on the guide rods (12) and slidably connected to the guide rods (12).

5. The high-temperature and high-pressure safety valve with back pressure control sleeve according to claim 4, characterized in that: The slide (20) is provided with two symmetrical guide holes (21) on the left and right sides, and the guide rod (12) passes through the guide holes (21).

6. The high-temperature and high-pressure safety valve with back pressure control sleeve according to claim 1, characterized in that: The back pressure control sleeve (11) has an exposure hole (13) on both the front and rear sides of the cylinder that communicates with the outside. The exposure hole (13) is long and elliptical.

7. The high-temperature and high-pressure safety valve with back pressure control sleeve according to claim 5, characterized in that: The top surface of the back pressure control sleeve (11) is threaded with two symmetrical fastening screws (14), which abut against the top surface of the lower pressure plate (30).

8. The high-temperature and high-pressure safety valve with back pressure control sleeve according to claim 7, characterized in that: The valve body (1) is fixedly equipped with a flange (16) at both the inlet and outlet ends, and a limit ring (151) is fixedly installed at the top of the threaded cylinder (15).

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