Internal pressure tapping self-operated low-temperature pressure regulating valve

Abstract

The utility model discloses an internal pressure tapping self-operated type low-temperature pressure regulating valve, which relates to the field of pressure regulating valves and comprises a valve body, through-flow pipes are fixedly mounted on two sides of the valve body, a partition plate is fixedly mounted in the valve body, a through groove is formed in the middle of the partition plate, a valve core is mounted in the through groove, and the valve core is fixedly mounted in the valve body. A fixing rod is installed on the surface of the valve element. According to the internal pressure tapping self-operated low-temperature pressure regulating valve, the rotating shaft and the fixing rod are arranged, when the rotating shaft rotates, the off-axis wheel can be driven to rotate, the edge of the off-axis wheel abuts against the end of the fixing rod, and therefore the position of the fixing rod is indirectly changed, and due to the fact that the fixing rod and the off-axis wheel attract each other, the off-axis wheel can be driven to rotate. Therefore, the position stability of the fixing rod can be guaranteed, the valve element can be in a normally-closed or normally-open state, the use state of the adjusting valve can be changed through the flowing direction of fluid, the adjusting valve does not need to be replaced, operation is convenient, and cost is saved.

Description

Technical Field

[0001] The utility model relates to the field of pressure regulating valves, in particular to an internal pressure-taking self-acting low-temperature pressure regulating valve. Background Art

[0002] The working principle of the self-operated pressure regulating valve is that when the pre-valve pressure of the working medium passes through the throttling behind the valve core and the valve seat, it becomes the post-valve pressure. The post-valve pressure is input into the lower diaphragm chamber of the actuator through the control pipeline and acts on the top plate. The generated force is balanced with the reaction force of the spring, which determines the relative position of the valve core and the valve seat and controls the post-valve pressure. When the post-valve pressure increases, the force of the post-valve pressure on the top plate also increases. The force of the top plate is greater than the reaction force of the spring, so that the valve core is closed to the position of the valve seat until the force of the top plate is balanced with the reaction force of the spring.

[0003] Self-operated pressure regulating valves include pressure-open type and pressure-close type. When the application environment is different, the type of pressure regulating valve required is also different. The valve core of the pressure-open regulating valve is normally closed, and the valve core of the pressure-closed regulating valve is normally open. However, each replacement of the regulating valve is not only very cumbersome to use, but also leads to an increase in the cost of use. Utility Model Content

[0004] The main purpose of the utility model is to provide an internal pressure-taking self-acting low-temperature pressure regulating valve, which can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an internal pressure-taking self-operated low-temperature pressure regulating valve, comprising a valve body, flow pipes are fixedly installed on both sides of the valve body, a partition plate is fixedly installed inside the valve body, a through groove is opened in the middle of the partition plate, a valve core is installed inside the through groove, a fixed rod is installed on the surface of the valve core, a moving rod is arranged above the valve core, and an adjustment component is arranged between the fixed rod and the moving rod for adjusting the position of the fixed rod;

[0006] The surface of the moving rod is sleeved with a mounting spring, one end of the mounting spring is fixed to the surface of the valve body, and the other end of the mounting spring is fixed to the surface of the moving rod. A protective cover is arranged outside the moving rod and the mounting spring, and a visible window is arranged on the surface of the protective cover.

[0007] A mounting frame is sleeved on the surface of the valve body, and the mounting frame is fixed on the surface of the valve body. A fixing ring is installed on the surface of the moving rod, one end of the mounting spring is fixed on the surface of the fixing ring, and the other end of the mounting spring is fixed on the surface of the mounting frame.

[0008] A threaded sleeve is fixedly mounted on the surface of the mounting frame, a threaded column is sleeved on the surface of the threaded sleeve, and one end of the mounting spring abuts against the surface of the threaded column.

[0009] The adjustment component includes a long groove opened at the bottom of the moving rod, one end of the fixed rod is movably installed inside the long groove, a circular groove is opened on the surface of the moving rod, a sealed bearing is installed inside the circular groove, a rotating shaft is installed inside the sealed bearing, an eccentric wheel is installed at the end of the rotating shaft, the eccentric wheel is against the end of the fixed rod, and a fixed component is installed at the end of the rotating shaft.

[0010] The fixing assembly comprises a gear plate, a threaded rod is installed on the surface of the moving rod, and one end of the threaded rod is clamped in the gear groove position of the gear plate.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. In the utility model, by setting a rotating shaft and a fixed rod, when the rotating shaft rotates, the eccentric wheel will be driven to rotate, and the edge of the eccentric wheel will abut against the end of the fixed rod, thereby indirectly changing the position of the fixed rod. Since the fixed rod and the eccentric wheel attract each other, the position of the fixed rod can be guaranteed to be stable, and the valve core can be in a normally closed or normally open state. The use state of the regulating valve can be changed by the flow direction of the fluid, so there is no need to replace the regulating valve, which is easy to operate and saves costs.

[0013] 2. In the utility model, by providing a threaded sleeve and a mounting spring, the position of the threaded column can be changed by rotating the threaded column, thereby adjusting the elastic force of the mounting spring, controlling the pressure of the fluid passing through the regulating valve, and expanding the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of an internal pressure-taking self-acting low-temperature pressure regulating valve of the utility model;

[0015] Figure 2 This is a schematic diagram of the installation spring position of a self-operated low-temperature pressure regulating valve with internal pressure taking according to the utility model;

[0016] Figure 3 This is a schematic cross-sectional view of the rotating shaft of an internal pressure-taking self-operated low-temperature pressure regulating valve of the utility model;

[0017] Figure 4 The utility model is a schematic diagram of the partial structure of the eccentric wheel position of an internal pressure-taking self-operated low-temperature pressure regulating valve.

[0018] In the figure: 1. valve body; 2. flow tube; 3. partition plate; 4. through groove; 5. valve core; 6. fixed rod; 7. movable rod; 8. protective cover; 9. visual window; 10. mounting spring; 11. mounting frame; 12. fixing ring; 13. threaded sleeve; 14. threaded column; 15. long groove; 16. round groove; 17. sealed bearing; 18. rotating shaft; 19. eccentric wheel; 20. gear plate; 21. threaded rod. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] like Figure 1-4 As shown, an internal pressure-taking self-operated low-temperature pressure regulating valve comprises a valve body 1, flow tubes 2 are fixedly installed on both sides of the valve body 1, the valve body 1 and the two flow tubes 2 are an integrated structure, a partition plate 3 is fixedly installed inside the valve body 1, and the shape of the partition plate 3 is similar to a "Z" shape, which divides the valve body 1 into two areas, and the area above the partition plate 3 inside the valve body 1 is connected with the inside of the liquid outlet pipe of the flow tube 2. When the fluid flows out at the position of the partition plate 3, a part of the fluid will be located above the partition plate 3. At this time, a certain fluid pressure will be formed on the partition plate 3, forming a pressure balance with the fluid pressure of the partition plate 3, and the two flow tubes 2 correspond to different areas respectively, and a through groove 4 is opened in the middle of the partition plate 3, and the shape of the through groove 4 is a "convex" shape. A valve core 5 is installed inside the through groove 4, and a fixed rod 6 is installed on the surface of the valve core 5. A moving rod 7 is arranged above the valve core 5, and an adjustment component is arranged between the fixed rod 6 and the moving rod 7 for adjusting the position of the fixed rod 6;

[0021] The surface of the movable rod 7 is sleeved with a mounting spring 10, one end of the mounting spring 10 is fixed to the surface of the valve body 1, and the other end of the mounting spring 10 is fixed to the surface of the movable rod 7. A protective cover 8 is arranged outside the movable rod 7 and the mounting spring 10, and the protective cover 8 protects the mounting spring 10. A visible window 9 is arranged on the surface of the protective cover 8, and an openable and closable sealing window is installed at the position of the visible window 9.

[0022] By adjusting the position of the fixing rod 6 through the adjusting assembly, the valve core 5 can be placed in a normally closed or normally open state, and the use state of the regulating valve can be changed by the flow direction of the fluid.

[0023] The surface of the valve body 1 is sleeved with a mounting frame 11, and the mounting frame 11 is fixed on the surface of the valve body 1. A fixing ring 12 is installed on the surface of the moving rod 7. One end of the mounting spring 10 is fixed to the surface of the fixing ring 12, and the other end of the mounting spring 10 is fixed to the surface of the mounting frame 11. When the fluid enters the interior of the valve body 1, it will squeeze the valve core 5, so that it drives the moving rod 7 to move up and down, and the mounting spring 10 squeezes the moving rod 7.

[0024] A threaded sleeve 13 is fixedly mounted on the surface of the mounting frame 11, and a threaded column 14 is sleeved on the surface of the threaded sleeve 13. One end of the mounting spring 10 is against the surface of the threaded column 14, and its position can be changed by rotating the threaded column 14, thereby adjusting the elastic force of the mounting spring 10, controlling the pressure of the fluid passing through the regulating valve, and expanding the scope of application.

[0025] The adjustment component includes a long groove 15 opened at the bottom of the moving rod 7, one end of the fixed rod 6 is movably installed inside the long groove 15, and the fixed rod 6 moves inside the long groove 15. A circular groove 16 is opened on the surface of the moving rod 7, and a sealed bearing 17 is installed inside the circular groove 16. The sealed bearing 17 ensures the overall air tightness. A rotating shaft 18 is installed inside the sealed bearing 17, and an eccentric wheel 19 is installed at the end of the rotating shaft 18. The eccentric wheel 19 and the end of the fixed rod 6 are both magnetic, so that the two are attracted to each other. The eccentric wheel 19 is against the end of the fixed rod 6, and a fixed component is installed at the end of the rotating shaft 18.

[0026] When the rotating shaft 18 rotates, it will drive the eccentric wheel 19 to rotate. The edge of the eccentric wheel 19 abuts against the end of the fixed rod 6, thereby indirectly changing the position of the fixed rod 6. Since the fixed rod 6 and the eccentric wheel 19 attract each other, the position of the fixed rod 6 can be guaranteed to be stable.

[0027] The fixing assembly includes a gear plate 20, and a threaded rod 21 is installed on the surface of the moving rod 7. One end of the threaded rod 21 is stuck in the gear groove position of the gear plate 20. The threaded rod 21 is used to clamp the position of the gear plate 20 to prevent the rotating shaft 18 from rotating due to the elastic force of the installation spring 10.

[0028] It should be noted that the utility model is an internal pressure-taking self-operated low-temperature pressure regulating valve. When in use, the threaded rod 21 is rotated to make it away from the gear plate 20. The rotating gear plate 20 drives the rotating shaft 18 to rotate, which will drive the eccentric wheel 19 to rotate. The edge of the eccentric wheel 19 abuts against the end of the fixed rod 6, thereby indirectly changing the position of the fixed rod 6. Since the fixed rod 6 and the eccentric wheel 19 are attracted to each other, the position of the fixed rod 6 can be guaranteed to be stable. Then the threaded rod 21 is installed in the initial position, which can make the valve core 5 in a normally closed or normally open state, and the use state of the regulating valve can be changed by the flow direction of the fluid.

[0029] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An internal pressure-taking self-operated low-temperature pressure regulating valve, comprising a valve body (1), with flow pipes (2) fixedly mounted on both sides of the valve body (1), characterized in that: A partition plate (3) is fixedly mounted inside the valve body (1), a through groove (4) is provided in the middle of the partition plate (3), a valve core (5) is mounted inside the through groove (4), a fixed rod (6) is mounted on the surface of the valve core (5), a movable rod (7) is arranged above the valve core (5), and an adjustment component is arranged between the fixed rod (6) and the movable rod (7) for adjusting the position of the fixed rod (6); The surface of the moving rod (7) is sleeved with a mounting spring (10), one end of the mounting spring (10) is fixed to the surface of the valve body (1), and the other end of the mounting spring (10) is fixed to the surface of the moving rod (7). A protective cover (8) is provided outside the moving rod (7) and the mounting spring (10), and a visual window (9) is provided on the surface of the protective cover (8).

2. The internal pressure self-operated low-temperature pressure regulating valve according to claim 1, characterized in that: The surface of the valve body (1) is sleeved with a mounting frame (11), the mounting frame (11) is fixed to the surface of the valve body (1), the surface of the moving rod (7) is mounted with a fixing ring (12), one end of the mounting spring (10) is fixed to the surface of the fixing ring (12), and the other end of the mounting spring (10) is fixed to the surface of the mounting frame (11).

3. The internal pressure self-operated low-temperature pressure regulating valve according to claim 2, characterized in that: A threaded sleeve (13) is fixedly mounted on the surface of the mounting frame (11), a threaded column (14) is sleeved on the surface of the threaded sleeve (13), and one end of the mounting spring (10) abuts against the surface of the threaded column (14).

4. The internal pressure self-operated low-temperature pressure regulating valve according to claim 1, characterized in that: The adjustment component comprises a long groove (15) formed at the bottom of the movable rod (7); one end of the fixed rod (6) is movably mounted inside the long groove (15); a circular groove (16) is formed on the surface of the movable rod (7); a sealed bearing (17) is mounted inside the circular groove (16); a rotating shaft (18) is mounted inside the sealed bearing (17); an eccentric wheel (19) is mounted at the end of the rotating shaft (18); the eccentric wheel (19) abuts against the end of the fixed rod (6); and a fixed component is mounted at the end of the rotating shaft (18).

5. The internal pressure self-operated low-temperature pressure regulating valve according to claim 4, characterized in that: The fixing assembly comprises a gear plate (20), a threaded rod (21) is mounted on the surface of the moving rod (7), and one end of the threaded rod (21) is clamped in the gear groove of the gear plate (20).

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