An adaptive pressure regulating valve

Abstract

The utility model relates to pressure regulating valve door technical field discloses a kind of self-adapting pressure regulating valve doors, including valve body, the top of the valve body is fixedly connected with valve pipe, the top of the valve pipe is fixedly connected with flange one, the top of the flange one is fixedly connected with cover by bolt, the inside of the cover is threadedly connected with threaded rod, the bottom of the threaded rod is fixedly connected with adjusting plate, the surface of the adjusting plate is sleeved with limit sleeve, the bottom of the limit sleeve is fixedly connected with sliding table, the bottom of the sliding table is fixedly connected with trapezoidal block, the top of the threaded rod is fixedly connected with hand wheel.The utility model is through setting trapezoidal block and spring, when water flow increases, sliding table compresses spring, trapezoidal block moves up, when water flow reduces, spring rebounds, trapezoidal block moves down, make trapezoidal block and the flow cross section of valve body inner wall automatically change with flow, realize the self-adapting adjustment to the water flow pressure of passing through valve body, without external power, outlet pressure can be kept stable.

Description

Technical Field

[0001] This utility model relates to the field of pressure regulating valve technology, and in particular to an adaptive pressure regulating valve. Background Technology

[0002] Pressure regulating valves, as key accessories in fluid transport systems, reduce the inlet pressure to a predetermined outlet pressure by changing the flow cross-section, and automatically maintain a stable outlet pressure by relying on the energy of the medium itself. They are widely used in industrial pipelines such as water supply, petrochemicals, and power generation.

[0003] The existing valves have some problems in operation. First, the set pressure of the spring-diaphragm assembly is fixed. When the upstream flow changes drastically, the valve opening cannot be adjusted synchronously, and the outlet pressure will still fluctuate significantly, making it difficult to achieve true adaptive pressure stabilization. Second, if forced full opening or full closing is required, an additional bypass or shut-off valve must be installed, which increases costs, occupies space, and makes operation and maintenance inconvenient. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides an adaptive pressure regulating valve.

[0005] This utility model is achieved using the following technical solution: an adaptive pressure regulating valve, comprising a valve body, a valve pipe fixedly connected to the top of the valve body, a flange fixedly connected to the top of the valve pipe, a cover fixedly connected to the top of the flange by bolts, a threaded rod connected internally to the cover, an adjusting plate fixedly connected to the bottom of the threaded rod, a limit sleeve fitted onto the surface of the adjusting plate, a slide fixedly connected to the bottom of the limit sleeve, a trapezoidal block fixedly connected to the bottom of the slide, a handwheel fixedly connected to the top of the threaded rod, and a spring fixedly connected to the top of the slide.

[0006] The above technical solution enables the thrust generated by the water flow acting on the trapezoidal block to be balanced with the spring force in real time. The slide table can change the flow area between the trapezoidal block and the valve body by sliding up and down in the valve pipe, thereby achieving the effect of automatically adjusting the outlet pressure according to the flow rate.

[0007] As a further improvement to the above solution, the valve body is connected to the valve pipe, the surface of the slide is in contact with the inner wall of the valve pipe, and the trapezoidal block is adapted to the interior of the valve body.

[0008] With the above technical solution, the valve body and valve pipe are directly connected, the outer wall of the slide table slides and fits with the inner wall of the valve pipe, and the shape of the trapezoidal block matches the internal flow channel contour of the valve body, ensuring that there are no additional ineffective cavities inside the valve during the movement of the slide table, avoiding turbulence and pressure loss, and improving adjustment sensitivity.

[0009] As a further improvement to the above solution, the vertical distance from top to bottom of the trapezoidal block to the leftmost end of the slide gradually decreases, and the top of the spring contacts the bottom of the cover.

[0010] Through the above technical solution, the trapezoidal block adopts a gradual structure in which the vertical distance from top to bottom to the leftmost end of the slide table gradually decreases, so that the rate of change of flow area caused by the same axial displacement is linear. The top of the spring abuts against the bottom of the cover, ensuring that the spring compression is determined only by the displacement of the slide table.

[0011] As a further improvement to the above solution, a sliding hole is provided at the bottom of the slide table, and a sliding rod is slidably connected inside the sliding hole.

[0012] The above technical solution involves opening a sliding hole at the bottom of the slide table and sliding it in conjunction with the slide rod, which completely constrains the circumferential rotational freedom of the slide table and retains only the axial movement freedom, preventing the trapezoidal block from wearing out and extending the sealing life.

[0013] As a further improvement to the above solution, two sliding holes are provided, and the two sliding holes are centrally symmetrically distributed around the top of the slide table.

[0014] With the above technical solution, the two sliding holes are symmetrically arranged around the top center of the slide table, and the reaction force of the slide rod acts symmetrically on the slide table, eliminating the lateral torque, minimizing the friction of the slide table movement, and improving the response speed under low flow conditions.

[0015] As a further improvement to the above solution, the bottom of the slide rod is fixedly connected to the inner wall of the valve body, and the top of the slide rod is in contact with the bottom of the cover.

[0016] As a further improvement to the above solution, flanges are fixedly connected to both the left and right ends of the valve body. A sealing groove is provided on the surface of the flange, and a sealing strip is snapped into the inside of the sealing groove. Mounting holes are provided on the surface of the flange.

[0017] Through the above technical solution, sealing grooves and mounting holes are set on both ends of the flange. After the sealing strip is embedded in the groove, it is uniformly compressed by the flange clamping force to form a static seal on the end face. The circumferential array arrangement of the mounting holes ensures that the bolt preload is symmetrical and prevents leakage caused by uneven sealing.

[0018] As a further improvement to the above solution, the sealing groove is concentric with the second flange, and the number of mounting holes is set to a certain number, which are distributed in a circumferential array on the left end surface of the second flange.

[0019] Through the above technical solution, the sealing groove and the flange are concentric, so that the compression of the sealing strip is consistent within a 360° range. Multiple mounting holes are distributed in a circumferential array to provide a continuous bolt preload closed loop, ensuring that the sealing strip is always at the optimal compression rate under high pressure and avoiding local stress relaxation.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention, by setting a trapezoidal block and a spring, allows the slide to compress the spring and the trapezoidal block to move upward when the water flow increases, and the spring to rebound and the trapezoidal block to move downward when the water flow decreases. This enables the flow cross-section of the trapezoidal block and the inner wall of the valve body to automatically change with the flow rate, thus achieving adaptive adjustment of the water pressure passing through the valve body and maintaining a stable outlet pressure without the need for external power.

[0021] This utility model uses a mechanical limiting mechanism consisting of a handwheel, a threaded rod, an adjusting plate, and a limiting sleeve. Rotating the handwheel converts the rotational motion of the threaded rod into the vertical linear motion of the adjusting plate, precisely limiting the extreme positions of the slide and the trapezoidal block. This allows the valve to be either pressed down to keep it normally closed or lifted up to keep it normally open, enabling rapid switching between adaptive pressure regulation and forced opening / closing conditions for the same valve. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model; Figure 3 This is a schematic diagram of the overall spring connection structure of this utility model; Figure 4 This is a schematic diagram of the overall connection structure between the limiting sleeve and the adjusting plate of this utility model.

[0023] Explanation of key symbols: 1. Valve body; 2. Valve pipe; 3. Flange 1; 4. Cover; 5. Threaded rod; 6. Adjusting plate; 7. Limit sleeve; 8. Slide table; 9. Trapezoidal block; 10. Sliding hole; 11. Sliding rod; 12. Handwheel; 13. Flange 2; 14. Sealing groove; 15. Sealing strip; 16. Mounting hole; 17. Spring. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] Example: Please combine Figure 1-4An adaptive pressure regulating valve according to this embodiment includes a valve body 1, a valve pipe 2 fixedly connected to the top of the valve body 1, a flange 3 fixedly connected to the top of the valve pipe 2, a cover 4 fixedly connected to the top of the flange 3 by bolts, a threaded rod 5 connected internally to the cover 4, an adjusting plate 6 fixedly connected to the bottom of the threaded rod 5, a limit sleeve 7 sleeved on the surface of the adjusting plate 6, a slide 8 fixedly connected to the bottom of the limit sleeve 7, a trapezoidal block 9 fixedly connected to the bottom of the slide 8, a handwheel 12 fixedly connected to the top of the threaded rod 5, and a spring 17 fixedly connected to the top of the slide 8.

[0026] In use, the liquid enters the interior of the valve body 1 through the right end of the valve body 1 and then comes into contact with the surface of the trapezoidal block 9. Since the distance between the trapezoidal block 9 and the bottom gradually decreases, when the water flow increases, the slide 8 slides on the inner wall of the valve tube 2, and the spring 17 is compressed. When the water flow decreases, the spring 17 rebounds, and the slide 8 drives the trapezoidal block 9 to move down. The opening distance between the trapezoidal block 9 and the inner wall of the valve body 1 decreases, and the water flow through the valve body 1 decreases, so as to make adaptive adjustment of the pressure of the water flow.

[0027] Valve body 1 is connected to valve pipe 2. The surface of slide 8 is in contact with the inner wall of valve pipe 2. Trapezoidal block 9 is adapted to the interior of valve body 1. Valve body and valve pipe are directly connected. The outer wall of slide 8 slides in cooperation with the inner wall of valve pipe. The shape of trapezoidal block is adapted to the internal flow channel contour of valve body. This ensures that there is no extra ineffective cavity inside valve during slide movement, avoids turbulence and pressure loss, and improves adjustment sensitivity.

[0028] The vertical distance from top to bottom of trapezoidal block 9 to the leftmost end of slide table 8 gradually decreases. The top of spring 17 contacts the bottom of cover 4. The trapezoidal block adopts a gradual structure of "the vertical distance from top to bottom to the leftmost end of slide table gradually decreases", so that the rate of change of flow area caused by the same axial displacement is linear. The top of spring abuts against the bottom of cover, ensuring that the spring compression is determined only by the displacement of slide table, simplifying the pressure-displacement relationship and improving the pressure stabilization accuracy.

[0029] The bottom of the slide table 8 is provided with a sliding hole 10, and a slide rod 11 is slidably connected inside the sliding hole 10. The sliding hole at the bottom of the slide table is slidably engaged with the slide rod, which completely constrains the circumferential rotational freedom of the slide table and retains only the axial movement freedom, preventing the trapezoidal block from wearing out and extending the sealing life.

[0030] There are two sliding holes 10. The two sliding holes 10 are centrally symmetrically distributed around the top of the slide table 8. The two sliding holes are centrally symmetrically arranged around the top of the slide table. The reaction force of the slide rod acts symmetrically on the slide table, eliminating the lateral torque, minimizing the friction of the slide table movement, and improving the response speed under low flow conditions.

[0031] The bottom of the slide rod 11 is fixedly connected to the inner wall of the valve body 1, and the top of the slide rod 11 is in contact with the bottom of the cover 4.

[0032] Flange 13 is fixedly connected to both the left and right ends of valve body 1. A sealing groove 14 is provided on the surface of flange 13. A sealing strip 15 is snapped into the inside of the sealing groove 14. Mounting hole 16 is provided on the surface of flange 13.

[0033] The sealing groove 14 is concentric with the flange 13. The number of mounting holes 16 is set to a certain extent, and the mounting holes 16 are arranged in a circular array on the left end surface of the flange 13.

[0034] The implementation principle of an adaptive pressure regulating valve in this embodiment is as follows: When the regulating valve is used, the liquid first enters the interior of the valve body 1 through the right end of the valve body 1, and then contacts the surface of the trapezoidal block 9. Since the distance between the trapezoidal block 9 and the bottom gradually decreases, when the water flow increases, the slide 8 slides on the inner wall of the valve pipe 2, and the spring 17 is compressed. When the water flow decreases, the spring 17 rebounds, and the slide 8 drives the trapezoidal block 9 to move down. The opening distance between the trapezoidal block 9 and the inner wall of the valve body 1 decreases, and the water flow through the valve body 1 decreases, so as to adaptively regulate the pressure of the water flow.

[0035] By rotating the threaded rod 5 through the handwheel 12, the rotational motion of the threaded rod 5 inside the cover 4 is converted into vertical linear motion, causing the adjusting plate 6 to move along the threaded rod 5 inside the limiting sleeve 7, thereby limiting the vertical position of the trapezoidal block 9 and the slide 8. The adjusting plate 6 can also press or lift the slide 8 to make the valve body 1 normally open or normally closed.

[0036] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. An adaptive pressure regulating valve, characterized in that, The valve body (1) is fixedly connected to a valve pipe (2) at the top of the valve body (1). A flange (3) is fixedly connected to the top of the valve pipe (2). A cover (4) is fixedly connected to the top of the flange (3) by bolts. A threaded rod (5) is threadedly connected to the inside of the cover (4). An adjusting plate (6) is fixedly connected to the bottom of the threaded rod (5). A limit sleeve (7) is fitted on the surface of the adjusting plate (6). A slide (8) is fixedly connected to the bottom of the limit sleeve (7). A trapezoidal block (9) is fixedly connected to the bottom of the slide (8). A handwheel (12) is fixedly connected to the top of the threaded rod (5). A spring (17) is fixedly connected to the top of the slide (8).

2. The adaptive pressure regulating valve as described in claim 1, characterized in that: The valve body (1) is connected to the valve pipe (2), the surface of the slide (8) is in contact with the inner wall of the valve pipe (2), and the trapezoidal block (9) is adapted to the interior of the valve body (1).

3. The adaptive pressure regulating valve as described in claim 1, characterized in that: The vertical distance from top to bottom of the trapezoidal block (9) to the leftmost end of the slide (8) gradually decreases, and the top of the spring (17) contacts the bottom of the cover (4).

4. The adaptive pressure regulating valve as described in claim 1, characterized in that: The bottom of the slide table (8) is provided with a sliding hole (10), and a slide rod (11) is slidably connected inside the sliding hole (10).

5. The adaptive pressure regulating valve as described in claim 4, characterized in that: The number of the sliding holes (10) is set to two, and the two sliding holes (10) are centrally symmetrically distributed around the top of the slide table (8).

6. The adaptive pressure regulating valve as described in claim 4, characterized in that: The bottom of the slide rod (11) is fixedly connected to the inner wall of the valve body (1), and the top of the slide rod (11) is in contact with the bottom of the cover (4).

7. The adaptive pressure regulating valve as described in claim 1, characterized in that: The valve body (1) is fixedly connected to flange two (13) at both ends. A sealing groove (14) is provided on the surface of flange two (13). A sealing strip (15) is snapped into the inside of the sealing groove (14). An installation hole (16) is provided on the surface of flange two (13).

8. An adaptive pressure regulating valve as described in claim 7, characterized in that: The sealing groove (14) is concentric with the flange two (13), and the number of mounting holes (16) is set to a certain number, which are arranged in a circular array on the left end surface of the flange two (13).

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