An automatically adjustable piston throttle

Abstract

The utility model discloses an automatic adjusting piston type throttle valve relates to valve control technical field. The throttle valve includes valve body, inlet pipe, valve core, sealing seat, slide cylinder, limit board, spring, threaded rod, hand wheel and U type support frame etc. structure. The valve core bottom is provided with the valve plate for the plugging of sealing seat, and the valve core surface evenly is equipped with the openwork hole, and the slide cylinder is sleeved in the valve core outside and is connected with the limit board, and the limit board can move up or move down with the fluid pressure change under the elastic force effect of spring, to adjust the open area of openwork hole, thereby realizes the automatic regulation of flow. When fluid pressure rises, the slide cylinder moves up and makes flow increase, when pressure reduces, the slide cylinder moves down and makes flow reduce. Meanwhile, threaded rod and hand wheel cooperation can realize manual control valve core position, and U type support frame provides the guidance support for threaded rod, prevents the shake when long stroke operation.

Description

Technical Field

[0001] This utility model belongs to the field of throttle valve technology, specifically relating to an automatically adjustable piston-type throttle valve. Background Technology

[0002] Currently, throttle valves are widely used in fluid pipeline systems to regulate the flow rate or pressure of fluids, ensuring the stability and safety of system operation. Common throttle valves often employ manual operation or a fixed valve core structure. Their adjustment primarily relies on manually rotating a threaded rod or handwheel to control the distance between the valve core and the sealing seat, thereby changing the cross-sectional area through which the fluid passes to regulate the flow rate. However, these traditional structures suffer from problems such as low adjustment accuracy, slow response speed, and the inability to automatically adjust according to changes in system pressure. When the fluid pressure in the pipeline system fluctuates, the valve core position remains unchanged, easily leading to excessively high or low flow rates, resulting in decreased system stability, and even causing equipment vibration or increased energy consumption.

[0003] Furthermore, while some existing throttle valves incorporate spring structures to provide auxiliary reset force, the linkage between the spring and the valve core is simply designed, failing to achieve real-time balance with fluid pressure. Especially under high-pressure conditions, uneven pressure on the valve core or increased frictional resistance can lead to problems such as insensitive valve opening and incomplete closure. Moreover, when operators manually adjust the valve using a threaded rod, the rod's extended length lacks effective support, easily causing it to wobble or shift under force, affecting the valve's service life and adjustment stability. Utility Model Content

[0004] To address the problems existing in the prior art, the purpose of this utility model is to provide an automatically adjustable piston-type throttle valve that can automatically adjust the flow rate according to changes in fluid pressure, while also having manual control functions and good operational stability, thus solving the aforementioned problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An automatically adjustable piston-type throttle valve includes a valve body, an inlet pipe on one side of the valve body, flanges at the bottom of the valve body and the end of the inlet pipe, and a sealing seat located below the inlet pipe flow channel inside the valve body.

[0007] A valve core is slidably installed on the inside of the valve body. A valve plate is provided at the bottom of the valve core. The valve plate blocks the water inlet pipe. The valve core is hollow inside with an open bottom. Hollow holes are evenly opened below the surface of the valve core.

[0008] A slide cylinder is slidably mounted on the surface of the valve core. A limit plate is provided at the top of the slide cylinder. The limit plate matches the inner diameter of the valve body. The valve opening and closing is controlled by adjusting the height of the slide cylinder.

[0009] Furthermore, a limit cap is screwed onto the top of the valve core, and a spring is sleeved above the surface of the valve core. The spring is placed between the limit cap and the limit plate, and the spring applies a downward thrust to the limit plate.

[0010] Furthermore, a sealing cap is screwed onto the top of the valve body, and a threaded rod is screwed through the center of the sealing cap's surface vertically. The bottom of the threaded rod is rotatably mounted on the top of the valve core.

[0011] Furthermore, a control handwheel is provided at the top of the threaded rod, and the rotation of the threaded rod controls the overall movement of the valve core and the slide cylinder.

[0012] Furthermore, an annular groove is provided above the surface of the threaded rod, and slide rails are provided above both sides of the valve body surface.

[0013] Furthermore, a U-shaped support frame is slidably installed between the two slide rails. The U-shaped support frame has a downward-opening U-shaped structure, and its center is installed inside the annular groove.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This automatically adjustable piston-type throttle valve solves the problem of existing throttle valves being unable to automatically adjust flow based on pipeline pressure by incorporating a limiting plate, slide cylinder, and spring mechanism within the valve body that automatically responds to changes in fluid pressure. Through the interaction between the spring's elastic force and the fluid pressure, when the system pressure increases, the slide cylinder moves upward, gradually opening the perforated hole, increasing the fluid flow area and automatically increasing the flow rate. When the pressure decreases, the spring pushes the slide cylinder downward, gradually reducing the flow area, thus achieving an adaptive balance between pressure and flow. This avoids the response lag caused by frequent manual adjustments and improves the automation level and stability of the system operation.

[0016] This throttle valve effectively solves the problems of insensitive valve core movement and low adjustment accuracy in existing technologies by setting a guide fit structure between a slide cylinder and a limiting plate on the outside of the valve core. The precise fit between the limiting plate and the inner wall of the valve body forms a sliding guide, ensuring uniform force on the valve core during its up and down movement and preventing offset and jamming. The slide cylinder forms a stable support layer on the surface of the valve core, preventing valve core vibration caused by fluid impact. This allows the valve to maintain stable flow control performance even during long-term operation, thereby improving adjustment accuracy and service life.

[0017] This throttle valve features an annular groove at the top of the threaded rod that engages with a U-shaped support frame. This design solves the problem of wobbling and instability caused by excessively extended threaded rods during manual adjustment in existing throttle valves. The U-shaped support frame provides vertical guidance and support via side rails, ensuring axial stability of the threaded rod during lifting and lowering, and preventing wear on the threaded pair due to eccentric forces. The interlocking structure of the annular groove and the support frame provides both limiting and anti-slip functions, making manual adjustment smoother and safer, thereby improving the reliability and accuracy of the valve in manual operation mode.

[0018] This throttle valve features a threaded sealing cap on the top of the valve body and a limit cap on the top of the valve core. Manual opening control is achieved via a threaded rod and handwheel, solving the technical problem of existing throttle valves being unable to simultaneously achieve automatic adjustment and manual control. The operator can manually set the flow rate by rotating the threaded rod via the handwheel, allowing precise axial displacement of the valve core. Simultaneously, when no manual operation is performed, the internal spring and limit structure automatically restore pressure balance, achieving adaptive adjustment. This combination of automatic and manual control enhances the versatility and applicability of the throttle valve. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a cross-sectional structural diagram of the automatic adjustment mode of this utility model;

[0021] Figure 3 This is a cross-sectional three-dimensional structural diagram of the human-powered adjustment mode of this utility model.

[0022] Figure 4 This is a three-dimensional structural diagram of the present invention in a sealed state;

[0023] Figure 5 This is a schematic diagram of the valve core and slide cylinder installation structure of this utility model.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Valve body; 11. Inlet pipe; 12. Sealing seat; 13. Slide rail; 2. Sealing cap; 3. Valve core; 31. Valve plate; 32. Hollow hole; 4. Limit cap; 5. Slide cylinder; 51. Limit plate; 6. Spring; 7. Threaded rod; 71. Control handwheel; 72. Annular groove; 8. U-shaped support frame. Detailed Implementation

[0026] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0027] refer to Figures 1 to 5 As shown, an automatically adjustable piston-type throttle valve includes a valve body 1, with an inlet pipe 11 on one side of the valve body 1. Flanges are provided at the bottom of the valve body 1 and the end of the inlet pipe 11 for a secure connection with the pipeline system, ensuring that the medium does not leak during inflow and outflow. Existing throttle valves are prone to leakage due to pipe misalignment or poor sealing during connection. Therefore, flange structures are provided at the bottom of the valve body 1 and the end of the inlet pipe 11 to improve installation stability and sealing reliability. A sealing seat 12 is provided at the bottom of the valve body 1, which is connected to the flow channel of the inlet pipe 11. The sealing seat 12 is used to seal the valve when it is closed. In the prior art, the sealing surface is prone to wear after long-term pressure, resulting in gaps between the valve plate and the sealing seat, which affects the fluid control accuracy. Therefore, by providing a high-precision sealing seat 12 inside the valve body 1, the sealing performance and wear resistance can be effectively improved. A main flow cavity is formed inside the valve body 1, providing movement space for the valve core 3 and its internal throttle mechanism.

[0028] A valve core 3 is slidably mounted inside the valve body 1. As the core throttling component, the valve core 3 has a valve plate 31 at its bottom. The valve plate 31 is used to block the outlet of the inlet pipe 11. When the valve plate 31 is in contact with the sealing seat 12, the valve is closed; when the valve plate 31 moves upward, the valve is open. In existing throttling valve structures, the valve core's movement relies heavily on manual adjustment and cannot automatically respond to changes in fluid pressure, resulting in delayed flow regulation. Therefore, in this structure, the valve core 3 is slidably mounted and cooperates with an automatic adjustment mechanism, enabling dynamic response to changes in system pressure. The valve core 3 is hollow inside and open at the bottom, forming a fluid channel in the open state to reduce flow resistance and improve media throughput. Holes 32 are evenly distributed below the surface of the valve core 3. 2. Used to control flow rate by opening in stages under different pressure conditions. Traditional throttling orifices are prone to erosion when working under a single pressure. The evenly distributed perforated holes 32 in this structure can effectively disperse pressure differences. A slide cylinder 5 is slidably installed on the surface of the valve core 3. The slide cylinder 5 is a movable flow limiting element. A limit plate 51 is set on its top. The limit plate 51 matches the inner diameter of the valve body 1 and can move up and down inside the valve body 1. The opening area of ​​the perforated holes 32 can be controlled by the movement of the slide cylinder 5. In the prior art, the fit between the valve core and the limit element is often loose and the adjustment is not sensitive. However, the tight fit between the limit plate 51 and the inner wall of the valve body 1 can achieve stable guidance and sealing. The valve can be opened and closed by adjusting the height of the slide cylinder 5, thereby completing the automatic regulation of fluid flow.

[0029] refer to Figure 2 and Figure 5 As shown, a limit cap 4 is screwed onto the top of the valve core 3. The limit cap 4 is used to limit the upper position of the spring 6 and to provide axial guidance, preventing the spring 6 from deflecting and deforming under pressure. A spring 6 is sleeved on the surface of the valve core 3. The spring 6 is placed between the limit cap 4 and the limit plate 51. The spring 6 is used to provide a downward reset thrust for the slide cylinder 5, so that the slide cylinder 5 can quickly return to its original position to close the hollow hole 32 when the pressure inside the cavity decreases. In traditional spring-type throttling structures, insufficient elasticity or improper stroke design often leads to valves not closing tightly or opening with lag. However, this structure can achieve linear response in different pressure ranges by precisely setting the elastic constant and preload of the spring 6. The spring 6, the limit cap 4, and the limit plate 51 together form an elastic adaptive system to achieve dynamic balance between the internal pressure of the valve core and the fluid pressure.

[0030] refer to Figure 2 As shown, a sealing cap 2 is screwed onto the top of the valve body 1. The sealing cap 2 and the valve body 1 are connected by threads to form a detachable seal, which is convenient for later maintenance and replacement of internal components. A threaded rod 7 is screwed vertically through the center of the surface of the sealing cap 2. The bottom of the threaded rod 7 is connected to the top of the valve core 3 by rotational installation to form a manual control passage. In existing throttle valves, the threaded rod structure is mostly a fixed connection. When the operation is frequent or affected by vibration, it is easy to loosen or shift, thus affecting the axial positioning of the valve core. This structure achieves stable support with both sealing and guidance through threaded connection, making the lifting and lowering movement of the valve core 3 smoother. When the threaded rod 7 rotates, it can drive the valve core 3 to move up or down along the axis of the valve body 1 to achieve manual opening adjustment.

[0031] refer to Figure 2 As shown, a control handwheel 71 is provided at the top of the threaded rod 7. The control handwheel 71 is used to manually rotate the threaded rod 7, thereby controlling the overall lifting position of the valve core 3 and the slide cylinder 5 to achieve flow regulation under manual operation. In the case of existing throttle valves, the large rotational resistance and unstable guidance of the handwheel during manual adjustment lead to inaccurate valve core movement. Therefore, in this device, the control handwheel 71 and the threaded rod 7 are designed as an integrated unit, and easy operation is achieved through a high-precision threaded pair. The rotation of the threaded rod 7 causes the valve core 3 to move as a whole, and manual opening control can be performed when the external pressure is stable, thereby achieving compatible switching between automatic adjustment and manual control, ensuring the flexibility and safety of system operation.

[0032] refer to Figure 1 and Figure 3As shown, an annular groove 72 is provided above the surface of the threaded rod 7. The annular groove 72 is used to limit the engagement with the auxiliary support mechanism to prevent the threaded rod 7 from swaying when it rises during a long stroke. Slide rails 13 are provided on both sides of the valve body 1. The slide rails 13 are used to provide guide support for the upper support components. In the prior art, when the threaded rod has a long stroke, it is easy to vibrate and have eccentric torque during operation due to the lack of a guide device. This structure forms a stable support channel by arranging slide rails 13 above the valve body 1, thereby ensuring the smoothness of handwheel rotation and threaded rod lifting.

[0033] refer to Figure 1 and Figure 3 As shown, a U-shaped support frame 8 is slidably installed between the two slide rails 13. The U-shaped support frame 8 has a downward-opening U-shaped structure and is used to provide auxiliary support for the threaded rod 7 when it is raised. The center of the U-shaped support frame 8 is installed inside the annular groove 72. The limiting effect of the groove ensures a reliable fit between the U-shaped support frame 8 and the threaded rod 7. In the prior art, the manual adjustment mechanism often causes shaking or slippage due to uneven force on the rod when the large stroke is opened. This device, through the combined design of the slide rail 13 and the U-shaped support frame 8, makes the threaded rod 7 subject to bidirectional constraint in the vertical direction, which not only ensures the balance of the handwheel operation, but also prevents the threaded rod 7 from over-extending and becoming unstable during operation, thereby achieving high-precision, low-vibration flow regulation control.

[0034] The working principle of this utility model is as follows: both the end of the water inlet pipe 11 and the bottom of the valve body 1 are provided with flanges to connect to the pipeline. The medium enters through the water inlet pipe 11 and then exits through the bottom of the valve body 1. Under normal conditions, the threaded rod 7 is rotated to control the valve core 3 to be placed at the bottom and kept fixed, so that the valve plate 31 blocks the sealing seat 12. At the same time, due to the spring 6 applying a downward pushing force to the limiting plate 51, the slide cylinder 5 covers the surface of the hollow hole 32, and the valve is closed as a whole.

[0035] Since the inner diameter of the limiting plate 51 is the same as that of the valve body 1, a cavity is formed between the limiting plate 51 and the valve plate 31 that is connected to the water inlet pipe 11. When the pressure of the medium inside the cavity increases, the valve plate 31 is blocked by the sealing seat 12 and cannot move down. Therefore, the pressure will push the limiting plate 51 up, causing the limiting plate 51 to move up. The slide cylinder 5 moves up and gradually leaks out the hollow hole 32. The medium inside the cavity flows into the inner side of the valve core 3 through the hollow hole 32 and then flows down. When the pressure inside the cavity increases, the slide cylinder 5 overcomes the elastic force of the spring 6 and moves up a greater distance, increasing the number of hollow holes 32 that leak out. At this time, the flow rate increases. Conversely, when the internal pressure decreases, the spring 6 can control the slide cylinder 5 to move down and reduce the flow rate. This structure can automatically adjust the flow rate according to the internal pressure.

[0036] The handwheel 71 can also be manually rotated to control the valve core 3 to move upward via the threaded rod 7, so that the valve plate 31 no longer blocks the sealing seat 12. The medium entering through the water inlet pipe 11 can flow directly into the sealing seat 12. The flow rate can be controlled by manually controlling the height of the valve core 3. When the valve is opened, the upward movement distance of the threaded rod 7 increases. Through the cooperation of the annular groove 72 and the U-shaped support frame 8, the U-shaped support frame 8 can move upward accordingly. Since the U-shaped support frame 8 can only slide vertically along both sides, the U-shaped support frame 8 can assist in supporting the threaded rod 7 to prevent the instability of operation when the threaded rod 7 extends too far.

[0037] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. An automatically adjustable piston-type throttle valve, comprising a valve body (1), characterized in that: A water inlet pipe (11) is provided on one side of the valve body (1). Flanges are provided at the bottom of the valve body (1) and the end of the water inlet pipe (11). A sealing seat (12) is provided at the bottom inside the valve body (1). The sealing seat (12) is located below the flow channel of the water inlet pipe (11). A valve core (3) is slidably installed on the inner side of the valve body (1). A valve plate (31) is provided at the bottom of the valve core (3). The valve plate (31) blocks the water inlet pipe (11). The valve core (3) is hollow inside with an open bottom. Hollow holes (32) are evenly opened below the surface of the valve core (3). A slide cylinder (5) is slidably mounted on the surface of the valve core (3). A limit plate (51) is provided on the top of the slide cylinder (5). The limit plate (51) matches the inner diameter of the valve body (1). The valve opening and closing is controlled by adjusting the height of the slide cylinder (5).

2. The automatically adjustable piston-type throttle valve according to claim 1, characterized in that: The valve core (3) is screwed with a limit cap (4) at the top. A spring (6) is sleeved on the surface of the valve core (3). The spring (6) is placed between the limit cap (4) and the limit plate (51). The spring (6) applies a downward thrust to the limit plate (51).

3. The automatically adjustable piston-type throttle valve according to claim 1, characterized in that: The valve body (1) has a sealing cap (2) screwed onto its top. A threaded rod (7) is screwed vertically through the center of the surface of the sealing cap (2). The bottom of the threaded rod (7) is rotatably mounted on the top of the valve core (3).

4. The automatically adjustable piston-type throttle valve according to claim 3, characterized in that: The threaded rod (7) is equipped with a control handwheel (71) at the top, which controls the overall movement of the valve core (3) and the slide cylinder (5) by rotating the threaded rod (7).

5. The automatically adjustable piston-type throttle valve according to claim 4, characterized in that: An annular groove (72) is provided above the surface of the threaded rod (7), and slide rails (13) are provided on both sides above the surface of the valve body (1).

6. The automatically adjustable piston-type throttle valve according to claim 5, characterized in that: A U-shaped support frame (8) is slidably installed between the two slide rails (13). The U-shaped support frame (8) has a U-shaped structure with a downward opening, and the center of the U-shaped support frame (8) is installed inside the annular groove (72).

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