High-temperature-resistant and high-pressure-resistant valve structure for petrochemical engineering

Abstract

The utility model discloses a high temperature and high pressure resistant petrochemical valve structure which comprises a valve body, a valve ball is arranged in the valve body, a first ceramic coating is arranged on the outer wall face of a ball valve, a valve rod is installed at one end of the ball valve, the other end of the valve rod extends to the outside and is provided with a gear, and pipelines are symmetrically arranged on the two sides of the valve body. The outer wall of the pipeline on one side is thickened to form an annular part, an annular groove is formed in the annular part, a plurality of positioning grooves are formed in one side of the annular groove, positioning blocks are arranged in the positioning grooves, the annular part is sleeved with crown teeth, connecting rods are installed between the positioning blocks and the crown teeth, and a plurality of holding rods are installed on the outer ring faces of the crown teeth. The high-temperature-resistant valve is simple in structure, the high-temperature resistance is improved through the first ceramic coating, the high-temperature-resistant capacity of the valve rod is improved, the joint of the valve rod and the valve cover can be protected through the sealing cylinder, double high-pressure-resistant protection is achieved between the valve rod and the valve cover, and safety is improved.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a valve structure for petrochemical applications that is resistant to high temperature and high pressure. Background Technology

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and regulate and control the parameters of the transported medium. According to their functions, they can be divided into shut-off valves, check valves, regulating valves, etc. Valves are control components in fluid transport systems, with functions such as shut-off, regulation, flow guidance, backflow prevention, pressure stabilization, flow diversion, or overflow pressure relief. Valves used in fluid control systems range from the simplest shut-off valves to various valves used in extremely complex automatic control systems, with a wide variety of types and specifications. In petrochemical production, valves are needed to control fluid flow rate, and the high-temperature resistance of petrochemical valves determines the safety of operation.

[0003] Some existing valves, during long-term use, suffer from poor high-temperature resistance due to excessively high oil temperatures, resulting in a shortened valve lifespan. Additionally, during operation, the temperature of the valve is transferred to the handle, which can easily cause burns or discomfort to operators when in contact with the handle. This combination of short lifespan and low safety during operation further exacerbates the problem. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a valve structure for petrochemical applications that is resistant to high temperature and high pressure. The gear and crown gear are set separately, which reduces heat conduction and allows the crown gear to drive the valve stem to rotate more efficiently, thereby solving the problems mentioned in the background art.

[0005] This utility model is achieved through the following technical solution: a valve structure for petrochemical applications that is resistant to high temperature and high pressure, comprising a valve body, a valve ball disposed inside the valve body, a first ceramic coating disposed on the outer wall surface of the ball valve, a valve stem mounted on one end of the ball valve, the other end of the valve stem extending to the outside and mounted with a gear, pipes symmetrically disposed on both sides of the valve body, the outer wall of one side of the pipe being thickened to form an annular portion, an annular groove disposed on the annular portion, a plurality of positioning grooves disposed on one side of the annular groove, each positioning groove being provided with a positioning block, a crown tooth sleeved on the outside of the annular portion, a connecting rod being installed between the positioning block and the crown tooth, and a plurality of grip rods being installed on the outer ring surface of the crown tooth.

[0006] As a preferred technical solution, a sealing cylinder is installed on the exposed section of the valve stem, and a rubber layer is installed on the open end face of the sealing cylinder, with the rubber layer in contact with the outer wall surface of the valve body.

[0007] As a preferred technical solution, a groove is provided on the inner wall of one of the positioning grooves, and a limiting block is provided in the opening of the groove. One end of the limiting block protrudes into the positioning groove and contacts the side of the corresponding positioning block. The other side of the limiting block is flush with the inner side of the annular groove. The other end of the limiting block extends into the groove and is equipped with multiple compression springs. The other ends of the compression springs are all installed on the inner wall of the groove.

[0008] As a preferred technical solution, the positioning block, excluding its outer side, has a second ceramic coating on its remaining sides, and the width of the second ceramic coating plus the positioning block matches the width of the annular groove.

[0009] As a preferred technical solution, the crown teeth and gears are designed to not contact each other.

[0010] As a preferred technical solution, a heat insulation layer is installed on the outer surface of the grip bar.

[0011] The beneficial effects of this utility model are as follows: This utility model has a simple structure. The first ceramic coating increases the high temperature resistance and improves the high temperature resistance of the valve stem. The sealing cylinder protects the joint between the valve stem and the valve cover, providing double high pressure protection between the valve stem and the valve cover, thus increasing safety. The crown teeth and gears are set separately and, together with the first ceramic coating and the heat insulation layer, prevent the handle from getting too hot, thus avoiding burns and further increasing safety. The crown teeth are axially sleeved on the pipe, and the handle is distributed in a ring structure on the crown teeth. By lifting or pressing the handle, the valve stem can be rotated more effortlessly, and the rotation efficiency of the valve stem can be increased. Attached Figure Description

[0012] 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.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a side view of the present invention;

[0015] Figure 3 This is a partial cross-sectional view of the valve body and valve ball of this utility model;

[0016] Figure 4 This is a top view of the present invention.

[0017] Among them, 1. valve body; 2. pipe; 3. valve stem; 4. gear; 5. crown tooth; 6. connecting rod; 7. handle; 8. positioning block; 9. limit block; 10. valve ball; 11. first ceramic coating; 12. rubber layer; 13. sealing cylinder; 14. annular groove; 15. positioning groove; 16. annular part. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0020] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0021] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this utility model discloses a high-temperature and high-pressure resistant petrochemical valve structure, including a valve body 1. A valve ball 10 is provided inside the valve body 1. A first ceramic coating 11 is provided on the outer wall of the ball valve. A valve stem 3 is installed at one end of the ball valve. The other end of the valve stem 3 extends to the outside and is equipped with a gear 4. Pipes 2 are symmetrically arranged on both sides of the valve body 1. The outer wall of one side of the pipe 2 is thickened to form an annular part 16. An annular groove 14 is provided on the annular part 16. Multiple positioning grooves 15 are provided on one side of the annular groove 14. Positioning blocks 8 are provided in each positioning groove 15. Crown teeth 5 are sleeved on the outside of the annular part 16. A connecting rod 6 is installed between the positioning block 8 and the crown teeth 5. Multiple gripping rods 7 are installed on the outer ring surface of the crown teeth 5.

[0022] The first ceramic coating not only has good high temperature resistance, but also has a self-lubricating effect, which reduces the friction generated by the rotation of the valve ball. The first ceramic coating can also reduce the heat conducted to the valve stem, thereby providing the valve stem with high temperature resistance.

[0023] In this embodiment, a sealing cylinder 13 is installed on the exposed section of the valve stem 3, and a rubber layer 12 is installed on the open end face of the sealing cylinder 13. The rubber layer 12 is in contact with the outer wall surface of the valve body 1.

[0024] The sealing cylinder can seal the valve stem and valve cover, and the sealing performance between the sealing cylinder and the valve stem and valve cover plays a dual high-pressure sealing role, which greatly reduces the leakage of oil.

[0025] In this embodiment, a groove is provided on the inner wall surface of one of the positioning grooves 15, and a limiting block 9 is provided in the opening of the groove. One end of the limiting block 9 protrudes into the positioning groove 15 and is in contact with the side of the corresponding positioning block 8. The other side of the limiting block 9 is flush with the inner side of the annular groove 14. The other end of the limiting block 9 extends into the groove and is equipped with multiple compression springs. The other ends of the compression springs are all installed on the inner wall surface of the groove.

[0026] In this embodiment, the remaining sides of the positioning block 8, excluding the outer side, are all provided with a second ceramic coating. The width of the second ceramic coating plus the positioning block 8 matches the width of the annular groove 14. The second ceramic coating can reduce the heat conduction between the positioning block and the pipe, and also increase the smoothness of the positioning block when rotating in the annular groove.

[0027] In this embodiment, the crown tooth 5 and the gear 4 are not in contact, thus avoiding heat conduction between the crown tooth and the gear.

[0028] In this embodiment, a heat insulation layer is installed on the outer surface of the grip 7, which can play a role in heat insulation and prevent hands from getting hot when holding it.

[0029] Among them, since the gear and crown tooth are set separately, the heat on the valve stem is prevented from being directly applied to the crown tooth through the gear, reducing the number of conduction points. In addition, a second ceramic coating is set on the positioning block, which can reduce the heat applied to the connecting rod and crown tooth by the pipeline. Furthermore, a heat insulation layer is provided on the handle to prevent the temperature from getting too high when the operator holds the handle.

[0030] Furthermore, the crown tooth is mounted on the pipe. Compared to the existing horizontal installation method, the crown tooth can save effort by pressing down or lifting up, and has a better leverage effect. In addition, the crown tooth is larger than the gear, and one rotation of the crown tooth can drive the gear and valve stem to rotate multiple times, thereby increasing the efficiency of operation.

[0031] When the valve stem needs to be rotated, prepare a rigid rod (such as a screwdriver or wooden stick). Use this rod to press the limiting block. After the limiting block retracts into the groove, the positioning block can smoothly move out of the positioning groove and into the annular groove. After the positioning block moves into the annular groove, the crown tooth can mesh with the gear. The limiting block automatically returns to its original position through the elasticity of the compression spring, blocking the opening of the positioning groove and preventing the positioning block from re-entering the positioning groove. This ensures that the positioning block and the crown tooth can only rotate along the annular groove, thus ensuring stability during rotation.

[0032] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. A valve structure for petrochemical applications that is resistant to high temperature and high pressure, characterized in that: The valve includes a valve body (1), inside which a valve ball (10) is provided. The outer wall of the ball valve is provided with a first ceramic coating (11). A valve stem (3) is installed at one end of the ball valve. The other end of the valve stem (3) extends to the outside and is equipped with a gear (4). Pipes (2) are symmetrically arranged on both sides of the valve body (1). The outer wall of one side of the pipe (2) is thickened to form an annular part (16). An annular groove (14) is provided on the annular part (16). Multiple positioning grooves (15) are provided on one side of the annular groove (14). Positioning blocks (8) are provided in each positioning groove (15). Crown teeth (5) are sleeved on the outside of the annular part (16). Connecting rods (6) are installed between the positioning blocks (8) and the crown teeth (5). Multiple gripping rods (7) are installed on the outer ring surface of the crown teeth (5).

2. The high-temperature and high-pressure resistant valve structure for petrochemical applications according to claim 1, characterized in that: A sealing cylinder (13) is installed on the exposed section of the valve stem (3). A rubber layer (12) is installed on the open end face of the sealing cylinder (13). The rubber layer (12) is in contact with the outer wall surface of the valve body (1).

3. The high-temperature and high-pressure resistant valve structure for petrochemical applications according to claim 1, characterized in that: One of the positioning grooves (15) has a groove on its inner wall surface. A limiting block (9) is provided in the opening of the groove. One end of the limiting block (9) protrudes into the positioning groove (15) and contacts the side of the corresponding positioning block (8). The other side of the limiting block (9) is flush with the inner side of the annular groove (14). The other end of the limiting block (9) extends into the groove and is equipped with multiple compression springs. The other ends of the compression springs are all installed on the inner wall surface of the groove.

4. The high-temperature and high-pressure resistant valve structure for petrochemical applications according to claim 1, characterized in that: The positioning block (8) has a second ceramic coating on all remaining sides except for its outer side. The width of the second ceramic coating plus the positioning block (8) matches the width of the annular groove (14).

5. The high-temperature and high-pressure resistant valve structure for petrochemical applications according to claim 1, characterized in that: The crown tooth (5) and the gear (4) are not in contact.

6. The high-temperature and high-pressure resistant valve structure for petrochemical applications according to claim 1, characterized in that: The outer surface of the grip (7) is covered with a heat insulation layer.

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