A petrochemical pipeline pressure regulating device

Abstract

The utility model discloses a kind of petrochemical pipeline pressure regulating devices, belong to fluid pressure control technical field.The device includes support frame, pipeline, connecting chamber, upper membrane chamber, transmission rod and energy storage spring.It is key to set a set of pressure set value adjusting mechanism, the mechanism is driven by handle worm, worm drives worm gear rotation, worm gear is rotated by driving gear wheel with fixed gear ring, rotating ring is converted into the axial displacement of threaded column by screw thread cooperation with rotation movement, to change the pre-tightening force of energy storage spring.The utility model solves the problem that the adjusting precision of pressure set value is low and is easy to drift due to vibration in the prior art by the above-mentioned composite transmission structure, with the advantages of accurate adjustment, self-locking, stable and reliable set value.Meanwhile, by setting limit rod, stop valve and check valve, the overall reliability and safety of the device are further improved.

Description

Technical Field

[0001] This utility model relates to the field of fluid pressure control technology, and in particular to a petrochemical pipeline pressure regulating device. Background Technology

[0002] In petrochemical production, maintaining stable pressure of the medium within pipelines is crucial for ensuring normal process operation and production safety. Therefore, various pipeline pressure regulating devices are widely used. These devices automatically maintain the pressure at a specific point within the pipeline at a preset constant value. They typically operate on the principle of balancing the spring force with the pressure exerted by the medium on a diaphragm or piston, controlling fluid flow by adjusting the valve opening, thereby achieving automatic pressure regulation.

[0003] To adapt to different process requirements, pressure regulating devices need to be able to easily adjust their pressure setpoints. Currently, the conventional adjustment method is achieved through an adjusting screw or handwheel that acts directly on the energy storage spring. The operator changes the spring's pre-compression, or preload, by rotating the adjusting screw, thereby changing the pressure setpoint. While this direct adjustment structure is simple, it has also revealed inherent limitations in practical applications.

[0004] Because this regulating mechanism lacks effective transmission reduction and self-locking design, its adjustment accuracy is often low. Even a slight rotation of the handwheel by the operator can cause a large change in the pressure setpoint, making fine-tuning difficult. More importantly, in the complex operating environment of petrochemical plants, mechanical vibrations in pipelines or pressure pulsations in the fluid are continuous. This vibration will act on the regulating screw through the spring, which over time can easily cause the screw to loosen or shift slightly, resulting in a "drift" of the pressure setpoint. This disrupts the stability of the process, requiring periodic manual calibration, increasing the maintenance burden and potential process risks.

[0005] Therefore, this utility model proposes a petrochemical pipeline pressure regulating device to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems of low pressure setpoint adjustment accuracy and easy drift of setpoint due to external factors such as pipeline vibration in the existing petrochemical pipeline pressure regulating device, this utility model aims to provide a petrochemical pipeline pressure regulating device with improved structure that can effectively solve the above problems.

[0007] This utility model provides a petrochemical pipeline pressure regulating device, including: a support frame, a pipeline, a connecting chamber, an upper membrane chamber, a transmission rod, and an energy storage spring; and a pressure setpoint regulating mechanism installed on the support frame.

[0008] The pressure setting adjustment mechanism consists of a handle, worm gear, worm wheel, drive gear, support rod, rotating ring, fixed gear, and threaded column, forming a complete transmission chain.

[0009] Specifically, the handle and worm gear are coaxially fixedly connected. The worm gear is rotatably mounted on the support frame and meshes with a worm wheel, which is also rotatably mounted on the support frame. The driving gear is coaxially fixed to the worm wheel via a support rod. A rotating ring is rotatably mounted on the support frame and surrounds the energy storage spring. A fixed gear fixed to the outer circumference of the rotating ring meshes with the driving gear. A threaded post is threadedly engaged with the rotating ring and is slidably connected to the support frame in a non-rotational manner. With this combination, when the handle is turned, the worm gear mechanism drives the driving gear to rotate, which in turn drives the rotating ring to rotate. Finally, the rotational motion is precisely converted into the axial displacement of the threaded post through the threaded engagement, thereby changing the preload of the energy storage spring.

[0010] Preferably, the support frame includes an elliptical support plate and fixed columns vertically connected to the elliptical support plate.

[0011] Preferably, the rotating ring is provided with a spring groove, and the energy storage spring is housed in the spring groove.

[0012] Preferably, the petrochemical pipeline pressure regulating device further includes a fixed ring, which is fixed to the support frame and sleeved on the outer circumference of the rotating ring.

[0013] Preferably, the petrochemical pipeline pressure regulating device further includes a limiting rod, one end of which is fixed to the fixed ring, and the other end of which slides through the rotating ring to limit the rotation range of the rotating ring.

[0014] Preferably, the other end of the transmission rod is connected to the valve core disposed in the connecting chamber.

[0015] Preferably, the petrochemical pipeline pressure regulating device also includes a stop valve, which is installed on the side wall of the connecting chamber.

[0016] Preferably, the petrochemical pipeline pressure regulating device also includes a check valve, which is installed on the connecting chamber.

[0017] This utility model has the following beneficial effects: 1. This utility model solves the problems of low setting value adjustment accuracy, laborious operation, and easy drift of the setting value due to vibration in the existing pressure adjustment device by setting a pressure setting value adjustment mechanism consisting of a handle, worm, worm wheel, driving gear, fixed gear, rotating ring and threaded column in sequence. It achieves the technical effect of accurate, labor-saving and stable adjustment of pressure setting value, and the self-locking characteristic of the worm wheel mechanism ensures the long-term stability of the setting value.

[0018] 2. This utility model solves the problem in the prior art that the adjustment mechanism may be damaged due to excessive rotation operation, such as internal threads, by setting a limiting rod fixed to the fixed ring and allowing the limiting rod to slide through the rotating ring. It achieves the technical effect of reliably limiting the adjustment stroke, protecting the internal transmission chain, and improving the overall operational reliability and service life of the device. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of a petrochemical pipeline pressure regulating device proposed in this utility model. Figure 2 This is a schematic diagram of the structure of the fixed gear in a petrochemical pipeline pressure regulating device proposed in this utility model; Figure 3 This utility model proposes a petrochemical pipeline pressure regulating device. Figure 2 Enlarged diagram of point A in the middle.

[0020] Legend: 1. Pipeline; 2. Pressure guide pipe; 3. Connecting chamber; 4. Elliptical support plate; 5. Fixed column; 6. Energy storage spring; 7. Upper diaphragm chamber; 8. Transmission rod; 9. Stop valve; 10. Check valve; 11. Rotating ring; 12. Spring groove; 13. Fixed ring; 14. Limiting rod; 15. Fixed gear; 16. Threaded column; 17. Handle; 18. Drive gear; 19. Worm gear; 20. Worm; 21. Support rod. Detailed Implementation

[0021] Please refer to Figures 1 to 3 This utility model provides a petrochemical pipeline pressure regulating device, which aims to solve the problems in the prior art where the pressure setpoint regulating mechanism has a simple structure, resulting in low regulating accuracy and the setpoint is prone to drift due to vibration.

[0022] like Figures 1 to 3As shown, the petrochemical pipeline pressure regulating device includes a support frame, and a pipeline 1, a connecting chamber 3, an upper membrane chamber 7, and a pressure setpoint adjustment mechanism fixed to the support frame. The support frame includes an elliptical support plate 4 and a fixed column 5 vertically connected to the elliptical support plate 4. The elliptical support plate 4 and the fixed column 5 together provide a stable installation and support foundation for other components of the device. The connecting chamber 3 is fixed to the support frame and is fixedly connected to the pipeline 1. The upper membrane chamber 7 is also fixed to the support frame and is connected to the pipeline 1 through a pressure guide pipe 2 to sense the medium pressure inside the pipeline 1. One end of the transmission rod 8 passes through the upper membrane chamber 7 and is driven by the medium pressure inside it. The other end is connected to the valve core set in the connecting chamber 3. The energy storage spring 6 is sleeved on the outer periphery of the transmission rod 8. The pressure setpoint adjustment mechanism is integrally mounted on the support frame and is used to precisely adjust the preload of the energy storage spring 6, thereby setting the target of the device. The pressure setting adjustment mechanism specifically includes a handle 17, a worm 20, a worm wheel 19, a drive gear 18, a rotating ring 11, a fixed gear 15, and a threaded post 16. The handle 17 is coaxially fixedly connected to the worm 20, which is rotatably mounted on the support frame. The worm wheel 19 is rotatably mounted on the support frame and meshes with the worm 20. The drive gear 18 is coaxially fixed to the worm wheel 19 via a support rod 21. The rotating ring 11 is rotatably mounted on the support frame and surrounds the energy storage spring 6. The fixed gear 15 is fixed to the outer peripheral wall of the rotating ring 11 and meshes with the drive gear 18. The threaded post 16 is threadedly engaged with the rotating ring 11 and is slidably connected to the support frame in a non-rotational manner. This structure allows the rotation of the rotating ring 11 to drive the threaded post 16 to generate axial displacement through the threaded engagement, thereby resisting and changing the preload of the energy storage spring 6.

[0023] To achieve stable adjustment and limiting of the preload of the energy storage spring 6, the petrochemical pipeline pressure regulating device also includes a fixed ring 13 and a limiting rod 14. Furthermore, the fixed ring 13, the limiting rod 14, and the aforementioned rotating ring 11 form a specific structural fit and connection relationship.

[0024] Please refer to Figure 1 and Figure 3The core structure is described in detail below: The rotating ring 11 has an annular spring groove 12. One end of the energy storage spring 6 is housed within the spring groove 12, which provides radial support and axial positioning for the energy storage spring 6. The fixed ring 13 is fixed to the support frame and sleeved around the outer circumference of the rotating ring 11. One end of the limiting rod 14 is fixed to the fixed ring 13, and the other end slides through the rotating ring 11. In the assembled state, when the driving gear 18 drives the fixed gear 15, thereby causing the rotating ring 11 to rotate, the… Fixed at one end of the limiting rod 14, the through hole on the rotating ring 11 slides along the rod body of the limiting rod 14. When the rotating ring 11 rotates to the end of the limiting rod 14, its rotation is terminated. This fixed limiting structure formed by the fixed ring 13 and the limiting rod 14, in conjunction with the sliding insertion of the rotating ring 11, ensures that the rotation adjustment stroke of the rotating ring 11 is precisely limited within the preset mechanical range, avoiding damage to the threaded pair of the threaded column 16 due to over-adjustment, and also providing a stable external environment for the energy storage spring 6.

[0025] In addition, to improve the safety and maintainability of the device under abnormal operating conditions, a stop valve 9 and a check valve 10 are installed on the side wall of the connecting chamber 3 respectively. When the connecting chamber 3 is blocked, the stop valve 9 can be operated to release pressure, and the check valve 10 can prevent the medium in the pipeline from flowing back. The specific internal structure of these two valves is well known in the art and will not be described in detail here.

[0026] In a preferred embodiment, in order to construct a stable and reliable equipment base, the support frame specifically includes an elliptical support plate 4 and a plurality of fixed columns 5 vertically connected to the elliptical support plate 4. The upper membrane chamber 7 and the connecting chamber 3 are rigidly connected through these fixed columns 5, thereby providing a highly stable platform for the installation and operation of the pressure setpoint adjustment mechanism.

[0027] In a preferred embodiment, in order to achieve effective pressure regulation, one end of the transmission rod 8 that extends into the connecting chamber 3 is connected to the valve core disposed in the connecting chamber 3, so that the axial displacement generated by the pressure change in the upper diaphragm chamber 7 can be accurately transmitted to the valve core, directly controlling the flow cross section of the medium.

[0028] In a preferred embodiment, to ensure the stability of the energy storage spring 6 during the force process, a ring-shaped spring groove 12 is machined on the rotating ring 11. One end of the energy storage spring 6 is precisely embedded and housed in the spring groove 12, which effectively prevents the spring from radially deflecting during compression or tension.

[0029] In a preferred embodiment, in order to provide reliable limiting and support, the device further includes a fixing ring 13, which is fixed to the support frame by a fixing post 5 and is sleeved on the outer periphery of the rotating ring 11 from the outside. The fixing ring 13 provides a static mounting base for the limiting rod 14.

[0030] As a preferred embodiment, to prevent the rotating component of the adjustment mechanism from exceeding its designed stroke, one end of a limiting rod 14 is firmly fixed to the aforementioned fixed ring 13, while the other end slides through the rotating ring 11. This structure is simple and reliable, and can provide a rigid mechanical limit on the rotation range of the rotating ring 11.

[0031] As a preferred embodiment, in order to facilitate equipment maintenance and ensure operational safety, a stop valve 9 is installed on the side wall of the connecting chamber 3, and a check valve 10 is also installed on the connecting chamber 3.

[0032] Working principle: The automatic pressure regulation process of this device is as follows: The medium pressure in pipeline 1 is introduced into the upper diaphragm chamber 7 through the pressure guide pipe 2. After the diaphragm in the upper diaphragm chamber 7 is compressed, it will generate a force and push the transmission rod 8 to produce axial displacement. The displacement of the transmission rod 8 will compress or stretch the energy storage spring 6 sleeved on its outer periphery, and on the other hand, it will drive the valve core connected to its end in the connecting chamber 3 to move, thereby changing the flow area of ​​the medium. When the elastic force of the energy storage spring 6 is balanced with the medium pressure felt by the upper diaphragm chamber 7, the transmission rod 8 and the valve core are stabilized in a specific position, and the pressure after the valve is also stabilized at the preset value.

[0033] When the pressure setting needs to be adjusted, the operator turns the handle 17. The handle 17 drives the worm gear 20 to rotate through a coaxial fixed connection. The worm gear 20 meshes with the worm wheel 19, which in turn drives the worm wheel 19 to rotate. Since the worm wheel 19 is coaxially fixed with the drive gear 18 through the support rod 21, the drive gear 18 also rotates synchronously. The drive gear 18 meshes with the fixed gear 15 fixed on the outer peripheral wall of the rotating ring 11, thereby driving the rotating ring 11 to rotate. Since the rotating ring 11 is threadedly engaged with the threaded column 16, and the threaded column 16 is restricted by the support frame to slide in a non-rotational manner, the rotational motion of the rotating ring 11 is converted into a pure axial displacement of the threaded column 16. The axial displacement of the threaded column 16 directly changes its initial compression of the energy storage spring 6, i.e., the preload, thereby changing the pressure balance point and achieving the purpose of accurately setting and adjusting the pressure.

[0034] 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 variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A petrochemical pipeline pressure regulating device, comprising: Supporting framework; Pipe (1); A connecting chamber (3) is fixed to the support frame and is fixedly connected to the pipe (1); Upper membrane chamber (7), which is fixed to the support frame and connected to the pipeline (1) through pressure guide pipe (2); The transmission rod (8) has one end that passes through the upper membrane chamber (7) and is driven by the pressure of the medium inside it; An energy storage spring (6) is sleeved on the outer periphery of the transmission rod (8); The petrochemical pipeline pressure regulating device is characterized in that it further includes a pressure setpoint regulating mechanism installed on the support frame, the mechanism comprising: Handle (17); The worm (20) is rotatably mounted on the support frame and is coaxially fixedly connected to the handle (17); A worm gear (19) is rotatably mounted on the support frame and meshes with the worm (20); The driving gear (18) is coaxially fixed to the worm gear (19) via a support rod (21). Rotating ring (11), which is rotatably mounted on the support frame and arranged around the energy storage spring (6); A fixed gear (15) is fixed to the outer peripheral wall of the rotating ring (11) and meshes with the driving gear (18); The threaded column (16) is threadedly engaged with the rotating ring (11), and the threaded column (16) is slidably connected to the support frame in a non-rotational manner. The rotation of the rotating ring (11) drives the threaded column (16) to generate axial displacement through the threaded engagement, so as to abut and change the preload of the energy storage spring (6).

2. The petrification conduit pressure regulating device according to claim 1, characterized by, The support frame includes an elliptical support plate (4) and a fixed column (5) vertically connected to the elliptical support plate (4).

3. The petrification conduit pressure regulating device according to claim 1, characterized by, The rotating ring (11) is provided with a spring groove (12), and the energy storage spring (6) is housed in the spring groove (12).

4. The petrification tubing pressure regulating device of claim 1, wherein, It also includes a fixing ring (13), which is fixed to the support frame and sleeved on the outer periphery of the rotating ring (11).

5. The petrification conduit pressure regulating device according to claim 4, characterized by, It also includes a limiting rod (14), one end of which is fixed to the fixed ring (13), and the other end is slidably inserted in the rotating ring (11) to limit the rotation range of the rotating ring (11).

6. The petrification tubing pressure regulating device of claim 1, wherein, The other end of the transmission rod (8) is connected to the valve core located in the connecting chamber (3).

7. The petrification tubing pressure regulating device of claim 1, wherein, A stop valve (9) is also installed on the side wall of the connecting chamber (3).

8. The petrification conduit pressure regulating device according to claim 1, characterized by, A check valve (10) is also installed on the connecting chamber (3).

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