A self-operated steam regulating valve

Abstract

This utility model relates to a self-operated steam regulating valve, comprising a valve body and a valve core. The valve core consists of a positioning rod, a return spring, and a partition plate. The partition plate divides the interior of the valve body and has a through hole. A plug is provided at the bottom of the positioning rod for opening and closing the through hole, and the top of the positioning rod is connected to the piston rod of a single-cylinder piston. The right-side chamber of the valve body is connected to the top of the piston through a pipe, and the valve opening is controlled by the steam pressure pushing the piston. An adjusting device is provided at the top of the valve body to limit the maximum lifting height of the valve core, thereby regulating the maximum steam flow rate. If necessary, the through hole can be completely closed to cut off the steam supply.

Description

Technical Field

[0001] This utility model relates to the field of valve device technology, and in particular to a self-operated steam regulating valve. Background Technology

[0002] Self-operated steam control valves require no external energy source (no external power or gas supply). They utilize the energy of the controlled medium itself as the power source. The medium enters the valve body in the direction shown by the arrow, passes through the valve seats and valve core, and flows out through the outlet. When the pressure of the medium upstream reaches above the actuator, the initial preload of the spring is disrupted by the upstream pressure balance, causing the valve stem to move downwards and the valve core to open. The medium flows downstream through the cross-sectional area of ​​the valve core and valve seat, and the downstream pressure enters below the actuator, aligning with the spring force. If the downward thrust generated by the medium is equal to the spring preload (set force), the valve core opening remains unchanged. When the pressure changes, the balance is disrupted. If the downstream pressure is greater than the spring set pressure, the valve opening decreases; conversely, if the downstream pressure is less than the set pressure, the opening increases. Self-operated steam control valves offer advantages such as sensitive operation, energy saving and environmental protection, good sealing, and stable differential pressure. They are widely used in differential pressure control systems for steam in various industrial equipment.

[0003] Existing self-operated steam valves are not convenient for adjusting the spring force. Utility Model Content

[0004] The purpose of this invention is to provide a self-regulating steam control valve to solve the problems existing in the prior art.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A self-operated steam regulating valve includes a valve body and a valve core. The valve core includes a positioning rod, a guide rod, a return spring, and a partition. The partition is used to divide the interior of the valve body into two non-communicating parts. The partition includes a first vertical plate, a horizontal plate, and a second vertical plate. A through hole is provided at the center of the horizontal plate of the partition. The valve core is used to open and close the through hole. The valve core is fixedly installed on the inner top of the valve body.

[0007] The positioning rod is vertically oriented, with its bottom end passing through the top of the valve body and extending into the interior of the valve body. The positioning rod is collinear with the axis of the through hole. A plug located inside the valve body is fitted onto the bottom end of the positioning rod. A support frame is mounted on the top of the valve body, and a single-cylinder piston is mounted on the top of the support frame. The piston rod of the single-cylinder piston is located at the bottom, with its bottom surface fitting against the top surface of the positioning rod. A protruding disc portion is mounted on the top of the positioning rod. A return spring is coaxial with the positioning rod, with its bottom end fitting against the top of the valve body and its top surface fitting against the bottom of the disc portion. The right-side chamber inside the valve body is connected to the inner top of the single-cylinder piston via a pipe. An adjustment device is mounted on the inner top of the support frame to limit the maximum height of the disc portion.

[0008] By adopting the above technical solution, the adjusting device limits the maximum height of the disc, thereby limiting the maximum stroke of the plug away from the through hole, thus achieving control over the maximum steam feed rate. Furthermore, if necessary, the through hole can be completely blocked directly through the cooperation of the adjusting device and the plug, achieving the purpose of shutting off the steam feed when necessary.

[0009] In a further embodiment, multiple guide rods are provided, and the multiple guide rods are axially and evenly arranged around the top periphery of the positioning rod. The top end of each guide rod is fixedly connected to the support frame, and the bottom end of each guide rod passes through the disc portion. The disc portion has a positioning hole that mates with the guide rod. The adjusting device includes a ring and a sleeve. The ring is coaxial with the positioning rod. The top end of each guide rod is provided with a threaded end, and the top end of each guide rod is fitted with a sleeve. The bottom of the sleeve is provided with a downward protrusion, and the bottom end surface of the protrusion fits against the top end surface of the disc portion.

[0010] By adopting the above technical solution, the ring is used to limit and fix the relative position of the bottom end of the guide rod. During processing, the guide rod needs to be fixedly installed on the support frame first, and then the sleeve is screwed on. The bottom end of the sleeve is processed to make the length of the sleeve consistent, so as to avoid the problem of the disc part being tilted due to excessive tolerance.

[0011] In a further embodiment, the plug has a frustum-shaped structure, and a sealing ring is provided on the surface of the plug.

[0012] By adopting the above technical solution, when the plug moves to the lowest position, the sealing ring and the through hole cooperate to seal the through hole, thereby closing the valve core and reducing the machining accuracy requirements of all components.

[0013] In a further embodiment, the surface of the return spring is coated with anti-corrosion paint, and a waterproof layer is provided on the surface of the return spring.

[0014] By adopting the above technical solution, the waterproof layer is a flexible PE film, which is used to increase the service life of the reset spring and reduce the contact between the reset spring and the air.

[0015] In a further embodiment, the single-cylinder piston consists of a piston cylinder and a piston rod. The piston cylinder is fixedly mounted on the top of the support frame, and the opening of the piston cylinder faces downward.

[0016] In a further embodiment, the inner wall of the through hole is a conical surface.

[0017] The above technical solution is used in conjunction with the plug.

[0018] In summary, this utility model has the following beneficial effects:

[0019] 1. By limiting the maximum height of the disc section through the adjustment device, the maximum stroke of the plug away from the through hole is limited, thereby controlling the maximum steam feed rate. In case of necessity, the through hole can be completely blocked directly through the cooperation of the adjustment device and the plug, achieving the purpose of shutting off the steam feed when necessary. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a structural schematic diagram illustrating the adjustment device of this utility model.

[0022] In the diagram, 1. Valve body; 2. Valve core; 21. Positioning rod; 22. Guide rod; 23. Return spring; 24. Baffle plate; 3. Support frame; 4. Single-cylinder piston; 5. Adjustment device. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings.

[0024] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the attached figures. Figure 1 In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.

[0025] Example 1:

[0026] like Figures 1-2 As shown, a self-operated steam regulating valve includes a valve body 1 and a valve core 2. The valve core 2 includes a positioning rod 21, a guide rod 22, a return spring 23, and a partition 24. The partition 24 is used to divide the interior of the valve body 1 into two non-communicating parts. The partition 24 includes a first vertical plate, a horizontal plate, and a second vertical plate. A through hole is provided at the center of the horizontal plate of the partition 24. The valve core 2 is used to open and close the through hole. The valve core 2 is fixedly installed on the inner top of the valve body 1.

[0027] The positioning rod 21 is vertically oriented, with its bottom end passing through the top of the valve body 1 and extending into the interior of the valve body 1. The positioning rod 21 is collinear with the axis of the through hole. A plug located inside the valve body 1 is fitted onto the bottom end of the positioning rod 21. A support frame 3 is mounted on the top of the valve body 1, and a single-cylinder piston 4 is mounted on the top of the support frame 3. The piston rod of the single-cylinder piston is located at the bottom, with its bottom surface fitting against the top surface of the positioning rod 21. A protruding disc portion is provided at the top of the positioning rod 21. A return spring 23 is coaxial with the positioning rod 21, with its bottom end fitting against the top of the valve body 1 and its top end fitting against the bottom of the disc portion. The right-side chamber inside the valve body 1 is connected to the inner top of the single-cylinder piston via a pipe. An adjustment device 5 is provided at the inner top of the support frame 3 to limit the maximum height position of the disc portion. Multiple guide rods 22 are provided. Multiple guide rods 22 are axially and evenly arranged around the top edge of the positioning rod 21. The top of each guide rod 22 is fixedly connected to the support frame 3, and the bottom of each guide rod 22 passes through the disc portion. The disc portion has a positioning hole that mates with the guide rod 22. The adjusting device 5 includes a ring and a sleeve. The ring is coaxial with the positioning rod 21. The top of each guide rod 22 is set as a threaded end, and the top of each guide rod 22 is fitted with a sleeve. The bottom of the sleeve has a downward protrusion, and the bottom end face of the protrusion fits against the top face of the disc portion. The plug has a frustum-shaped structure, and a sealing ring is provided on the surface of the plug. The surface of the return spring 23 is coated with anti-corrosion paint, and a waterproof layer is provided on the surface of the return spring 23. The single-cylinder piston consists of a piston cylinder and a piston rod. The piston cylinder is fixedly installed on the top of the support frame 3, and the opening of the piston cylinder faces downward. It is used to mate with the plug.

[0028] Specific implementation process: By adjusting the device to limit the maximum height of the disc, the maximum stroke of the plug away from the through hole is limited, thereby controlling the maximum steam feed. In case of need, the through hole can be completely blocked by the adjustment device and the plug, thus achieving the purpose of shutting off the steam feed when necessary.

[0029] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.

[0030] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A self-operated steam regulating valve, characterized in that: The valve includes a valve body (1) and a valve core (2). The valve core (2) includes a positioning rod (21), a guide rod (22), a return spring (23), and a partition (24). The partition (24) is used to divide the interior of the valve body (1) into two non-communicating parts. The partition (24) includes a first vertical plate, a horizontal plate, and a second vertical plate. The horizontal plate of the partition (24) has a through hole that runs vertically through the center. The valve core (2) is used to open and close the through hole. The valve core (2) is fixedly installed on the inner top of the valve body (1). The positioning rod (21) is vertically oriented, with its bottom end passing through the top of the valve body (1) and extending into the interior of the valve body (1). The positioning rod (21) is collinear with the axis of the through hole. A plug located inside the valve body (1) is fitted onto the bottom end of the positioning rod (21). A support frame (3) is provided on the top of the valve body (1), and a single-cylinder piston (4) is provided on the top of the support frame (3). The piston rod of the single-cylinder piston is located at the bottom, and the bottom of the piston rod is aligned with the top of the positioning rod (21). The positioning rod (21) has a protruding disc at its top. The return spring (23) is coaxial with the positioning rod (21). The bottom end of the return spring (23) is attached to the top of the valve body (1). The top end of the return spring (23) is attached to the bottom of the disc. The right-side chamber inside the valve body (1) is connected to the inner top of the single-cylinder piston through a pipe. The inner top of the support frame (3) is provided with an adjustment device (5). The adjustment device (5) is used to limit the maximum height position of the disc.

2. The self-operated steam regulating valve according to claim 1, characterized in that: Multiple guide rods (22) are provided, and the multiple guide rods (22) are axially and evenly arranged around the top edge of the positioning rod (21). The top of each guide rod (22) is fixedly connected to the support frame (3). The bottom end of each guide rod (22) passes through the disc part. The disc part is provided with a positioning hole that cooperates with the guide rod (22). The adjusting device (5) includes a ring and a sleeve. The ring is coaxial with the positioning rod (21). The top of each guide rod (22) is provided with a threaded end. The top of each guide rod (22) is provided with a sleeve. The bottom of the sleeve is provided with a downward protrusion. The bottom end surface of the protrusion is in contact with the top end surface of the disc part.

3. The self-operated steam regulating valve according to claim 1, characterized in that: The plug has a frustum-shaped structure, and a sealing ring is provided on the surface of the plug.

4. A self-operated steam regulating valve according to claim 1, characterized in that: The surface of the return spring (23) is coated with anti-corrosion paint, and a waterproof layer is provided on the surface of the return spring (23).

5. A self-operated steam regulating valve according to claim 1, characterized in that: The single-cylinder piston consists of a piston cylinder and a piston rod. The piston cylinder is fixedly installed on the top of the support frame (3), and the opening of the piston cylinder faces downward.

6. A self-operated steam regulating valve according to claim 1, characterized in that: Used to work with plugs.

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