Lever self-operated regulating valve

Abstract

The utility model discloses a lever self-operated regulating valve, and belongs to the field of regulating valves. Comprising a regulating valve main body, which is provided with a liquid inlet chamber, a liquid outlet chamber and a connecting port for communicating the liquid inlet chamber with the liquid outlet chamber; a valve core; a lever mechanism; the external force applying mechanism is at least provided with a moving part sealed relative to the liquid outlet cavity and a pressing part for applying preset external force to the moving part; and the liquid outlet chamber is at least externally connected with a control valve, so that the liquid outlet chamber at least has a preset pressure intensity state capable of applying preset pressure to the moving part. The external force applying mechanism has the beneficial effects that the lever mechanism is arranged, and the length of the power arm part is larger than that of the resisting arm part, so that the external force applying mechanism can use small external force to drive an adjusting valve originally needing a large executing mechanism.

Description

Technical Field

[0001] This application relates to the field of control valves, and more specifically, to a lever-operated self-regulating control valve. Background Technology

[0002] A self-operated control valve is an energy-saving instrument that requires no external power source and automatically adjusts based on changes in the pressure, temperature, and flow rate of the controlled medium. It integrates measurement, execution, and control functions. Characterized by its simple structure, low cost, and reliable operation, it is suitable for applications where set parameters do not change frequently and where high adjustment accuracy is not required.

[0003] Self-operated control valves can be classified into pressure, differential pressure, level, temperature, and flow control valves according to their applications. Pressure control valves are further divided into direct-acting and pilot-operated types. Direct-acting control valves are suitable for systems with a pressure stabilization accuracy of 10% to 20%. However, because direct-acting control valves mainly rely on a spring load system to induce a pressure drop during valve operation, the spring force may become insufficient under high pressure conditions, making it impossible to control the valve core's movement. Utility Model Content

[0004] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0005] To address the technical problems mentioned in the background section, some embodiments of this application provide a lever-operated self-regulating valve, comprising: a regulating valve body having an inlet chamber, an outlet chamber, and a connection port connecting the inlet chamber and the outlet chamber; a valve core for forming a control port for controlling flow at the connection port; the self-regulating valve further comprising: a lever mechanism having a power arm portion, a resistance arm portion, and a fulcrum portion; the valve core being disposed in the resistance arm portion; the length of the power arm portion being greater than the length of the resistance arm portion; an external force application mechanism having at least a movable portion that seals relative to the outlet chamber and a pressure portion that applies a preset external force to the movable portion; the movable portion being disposed in the power arm portion; wherein, the outlet chamber is at least externally connected to a control valve so that the outlet chamber has at least a preset pressure state capable of applying a preset pressure to the movable portion; when the preset external force is greater than the preset pressure, the movable portion drives the valve core to move via the lever mechanism, thereby enlarging the control port; and / or when the preset external force is less than the preset pressure, the movable portion drives the valve core to move via the lever mechanism, thereby enlarging the control port.

[0006] Furthermore, when the valve core moves upward, the control port becomes larger; when the valve core moves downward, the control port becomes smaller; the external force application mechanism is located at the upper part of the regulating valve body, the valve core is located at the lower part of the regulating valve body, and the lever mechanism is located between the valve core and the external force application mechanism.

[0007] Furthermore, the external force application mechanism includes: a corrugated diaphragm and an elastic pressure member; the corrugated diaphragm is fixed to the inner wall of the liquid outlet chamber and forms an adjusting chamber that is sealed relative to the liquid outlet chamber; the elastic pressure member is disposed in the adjusting chamber and is partially connected to the power arm via the corrugated diaphragm; wherein at least a portion of the corrugated diaphragm forms the moving part and at least a portion of the elastic pressure member forms the pressing part.

[0008] Furthermore, the elastic pressure element is at least a spring or an elastic pad.

[0009] Furthermore, the external force application mechanism also includes a connector with at least a partially rigid portion, the rigid portion of which is fixed to the corrugated diaphragm; the elastic pressure member abuts against the rigid portion of the connector; and the power arm portion is connected to the rigid portion of the connector.

[0010] Furthermore, the connector also has a pressure portion; the area of ​​the pressure portion is larger than the portion of the elastic pressure member that abuts against the connector.

[0011] Furthermore, the resistance arm portion at least partially overlaps with the power arm portion.

[0012] Furthermore, the external force application mechanism also includes an adjustment member for adjusting the elastic pressure member to apply a preset external force to the corrugated diaphragm.

[0013] Furthermore, the pressure portion forms a pressure surface and a contact surface perpendicular to the pressure surface; the pressure surface and the contact surface constitute a cavity; the corrugated diaphragm is located outside the cavity.

[0014] Furthermore, the connector also has a guide portion; the guide portion is fixed to the top of the liquid outlet chamber; the guide portion is inserted into the cavity so that the pressure portion is slidably connected to the guide portion; the guide portion is located in the cavity when the corrugated diaphragm moves up or down.

[0015] The beneficial effect of this application is that by using the lever mechanism and the fact that the length of the power arm is greater than the length of the resistance arm, the external force application mechanism can use a smaller external force to drive the regulating valve that originally required a large actuator. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0017] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0018] In the attached diagram:

[0019] Figure 1 This is an overall schematic diagram based on an embodiment of this application;

[0020] Figure 2 This is a structural schematic diagram of a part of the embodiment, mainly showing... Figure 1 sectional structure;

[0021] Figure 3 This is a structural schematic diagram as part of an embodiment, mainly showing an observation from another perspective. Figure 2 The structure;

[0022] Figure 4 yes Figure 3 Enlarged view of part A;

[0023] Figure 5 yes Figure 3 Enlarged view of part B.

[0024] Figure label:

[0025] 1. Control valve body; 11. Inlet chamber; 12. Outlet chamber; 13. Connection port; 2. Valve core; 3. Lever mechanism; 31. Power arm; 32. Resistance arm; 33. Fulcrum; 4. External force application mechanism; 41. Pressure part; 411. Pressure surface; 412. Contact surface; 42. Guide part; 43. Corrugated diaphragm; 44. Elastic pressure element; 45. Connecting element; 451. Connecting rod; 452. Sealing ring. Detailed Implementation

[0026] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0027] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0028] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0029] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0030] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] Reference Figure 1-5 ,

[0032] A lever-operated self-regulating valve includes a regulating valve body 1, a valve core 2, a lever mechanism 3, and an external force application mechanism 4.

[0033] The regulating valve body 1 has an inlet chamber 11, an outlet chamber 12, and a connection port 13 connecting the inlet chamber 11 and the outlet chamber 12. The valve core 2 forms a control port at the connection port 13 to control the flow rate. Movement of the valve core 2 at the connection port 13 causes the control port to expand or contract, opening and closing, thereby controlling the flow rate of liquid from the inlet chamber 11 to the outlet chamber 12.

[0034] The lever mechanism 3 has a power arm portion 31, a resistance arm portion 32, and a fulcrum portion 33. Both the power arm portion 31 and the resistance arm portion 32 are rods of length. The length of the power arm portion 31 is greater than the length of the resistance arm portion 32. The fulcrum portion 33 is a hinged joint, allowing the power arm portion 31 to move and the resistance arm portion 32 to move via the fulcrum. The valve core 2 is disposed in the resistance arm portion 32.

[0035] The external force application mechanism 4 has at least a movable part that seals relative to the liquid outlet chamber 12 and a pressure part that applies a preset external force to the movable part. The pressure part applies a preset pressure to the movable part, and when the reaction force of the movable part is greater than or less than the preset external force, the movable part moves in the direction of the applied force. In this embodiment, the pressure part can be a diaphragm cylinder, which can control the pressure, thereby enabling the pressure part to apply a preset external force to the movable part. In this embodiment, the movable part can be a piston, which is pressed against and slidably connected to the inner wall of the liquid outlet chamber 12, thus allowing the movable part to move within the liquid outlet chamber 12. The movable part is located in the power arm portion 31. The liquid outlet chamber 12 is at least externally connected to a control valve to ensure that the liquid outlet chamber 12 has at least a preset pressure state capable of applying a preset pressure to the movable part. In a specific embodiment, the liquid outlet chamber 12 is externally connected to a pipe body, and a control valve is installed on the pipe body. The pipe body is used to discharge liquid. The inlet chamber 11 is connected to a liquid storage device and a power device for supplying liquid. Liquid is added to the inlet chamber 11 through the water supply device. When the control valve is closed or the flow rate is reduced, the liquid flow rate in the inlet chamber 11 remains unchanged, which leads to an increase in the pressure in the outlet chamber 12, thereby increasing the preset pressure and resulting in a situation where the preset external force is less than the preset pressure. Conversely, when the control valve is open or the flow rate is increased, the same mechanism occurs, resulting in a situation where the preset external force is greater than the preset pressure.

[0036] When the preset external force is greater than the preset pressure, the pressure in the outlet chamber 12 decreases, resulting in a lower outlet water pressure. Therefore, the moving part moves in the direction of the preset external force, and the moving part generates motion for the power arm part 31. This motion, via the lever mechanism 3, drives the valve core 2 to move, enlarging the control port and increasing the pressure in the outlet chamber 12, thus maintaining sufficient outlet water pressure. Similarly, when the preset external force is less than the preset pressure, the pressure in the outlet chamber 12 increases. Excessive outlet water pressure can easily cause the pipe connected to the outlet chamber 12 to burst or damage some high-precision control valves. Therefore, the moving part, via the lever mechanism 3, drives the valve core 2 to move, reducing the control port and lowering the pressure in the outlet chamber 12, thus reducing the outlet water pressure. This maintains the outlet water pressure within a certain range, avoiding both excessively low and high pressures, and better ensuring safety and stability during use.

[0037] Through the above technical solution, since the length of the power arm 31 is greater than the length of the resistance arm 32, the valve core 2 experiences greater resistance from the water flow when the water flow is large. Therefore, the use of a force-saving lever makes it easier to control the movement of the valve core 2.

[0038] Specifically, when the valve core 2 moves upward, the control port becomes larger; when the valve core 2 moves downward, the control port becomes smaller. The external force application mechanism 4 is located at the upper part of the regulating valve body 1, the valve core 2 is located at the lower part of the regulating valve body 1, and the lever mechanism 3 is located between the valve core 2 and the external force application mechanism 4. Therefore, by utilizing the principle that the regulating valve itself has an actuator, and placing the external force application mechanism 4 and the lever mechanism 3 at the location of the actuator, fewer modifications can be made to the structure of the regulating valve itself, thereby reducing the cost of modifying existing equipment used in the production of regulating valves. Simultaneously, it also allows for a more compact structure and reduced size of the self-operated regulating valve of this application.

[0039] In some embodiments, the external force application mechanism 4 includes a corrugated diaphragm 43 and an elastic pressure member 44. The elastic pressure member 44 is at least a spring or an elastic pad. The spring is a compression spring, and the elastic pad is a highly elastic rubber pad. A spring is preferred. The corrugated diaphragm 43 is fixed to the inner wall of the liquid outlet chamber 12, forming a regulating chamber that is sealed relative to the liquid outlet chamber 12. The liquid in the liquid outlet chamber 12 comes into contact with the corrugated diaphragm 43, causing the corrugated diaphragm 43 to move or deform under the influence of the liquid in the liquid outlet chamber 12. At least a portion of the corrugated diaphragm 43 forms the moving part, that is, the part of the corrugated diaphragm 43 that moves is the moving part. The elastic pressure member 44 is disposed in the regulating chamber, with one end of the elastic pressure member 44 abutting against the liquid storage chamber and the other end contacting the corrugated diaphragm 43. At least a portion of the elastic pressure member 44 forms the pressing part, that is, the part of the elastic pressure member 44 that contacts the corrugated diaphragm 43 is the pressing part. The elastic pressure member 44 is connected to the power arm portion 31 via the corrugated diaphragm 43. The corrugated diaphragm 43 allows the moving part to have more room to move even when the space in the liquid outlet chamber 12 is limited, and the part of the corrugated diaphragm 43 that contacts the inner wall of the liquid outlet chamber 12 will not move relative to the liquid outlet chamber 12, thus giving the corrugated diaphragm 43 a longer service life.

[0040] Specifically, the external force application mechanism 4 further includes a connector 45 having at least a partially rigid portion. The rigid portion of the connector 45 is fixed to the corrugated diaphragm 43; the elastic pressure member 44 abuts against the rigid portion of the connector 45; and the power arm portion 31 is connected to the rigid portion of the connector 45.

[0041] In some specific designs, the connector 45 includes a connecting rod 451, a sealing ring 452, a screw, and a nut. The screw is fixed to the connecting rod 451 and passes through the corrugated diaphragm 43. The sealing ring 452 is fitted onto the screw. The screw is a double-ended stud. Two sealing rings 452 are provided, located on both sides of the corrugated diaphragm 43. Two nuts are provided, pressing the sealing rings 452 against both sides of the corrugated diaphragm 43, thus fixing the screw to the corrugated diaphragm 43 and ensuring the sealing performance of the corrugated diaphragm 43. An elastic pressure member 44 abuts against the nuts. The power arm portion 31 is hinged to the connecting rod 451. Therefore, the connecting rod 451 and the nut constitute the rigid portion of the connector 45.

[0042] In other solutions, the connector 45 has flexible parts. Besides the sealing ring 452 in the above solutions, the connector 45 also has a connecting rope and a connecting seat fixed to the end of the connecting rope. The connecting seat is hinged to the power arm portion 31. This solution differs from the above solutions in that the connecting rod 451 is replaced by a connecting rope and a connecting seat, with the other end of the connecting rope connected to a screw. Therefore, when the preset external force is less than the preset pressure, the corrugated diaphragm 43 drives the power arm portion 31 upward through the screw, connecting rope, and connecting seat. When the preset external force is greater than the preset pressure, the screw on the corrugated diaphragm 43 moves downward, causing the connecting rope to bend and preventing it from driving the power arm portion 31 downward. Thus, this solution only achieves adjustment and control when the water pressure in the outlet chamber is low.

[0043] In other solutions, the difference from the above is that the connecting rod 451 is replaced with a push rod, or the connecting rope and connecting seat are replaced with a push rod. One end of the push rod is fixed to the threaded rod, and the other end of the push rod forms a push section. Therefore, when the preset external force is greater than the preset pressure, the corrugated diaphragm 43 drives the push rod downward through the screw, the push rod contacts the power arm part 31, and drives the power arm part 31 downward; while when the preset external force is less than the preset pressure, the screw on the corrugated diaphragm 43 moves upward, so that the push rod moves away from the power arm part 31 and cannot drive the power arm part 31 to move. Thus, this solution only achieves regulation and control when the water pressure in the outlet chamber is high.

[0044] Specifically, the regulating valve also includes a return spring, which is located at the valve core 2. One end of the return spring abuts against the valve core 2, and the other end abuts against the regulating valve body 1, thus the return spring is used to reset the valve core 2 after it has moved. In some embodiments, the return spring causes the valve core 2 to return downward; that is, when the connecting member 45 has a connecting rope and a connecting seat, the return spring causes the valve core 2 to return downward after the external force is removed. In other embodiments, the return spring causes the valve core 2 to return upward; that is, when the connecting member 45 has a push rod, the return spring causes the valve core 2 to return upward after the external force is removed.

[0045] In other embodiments, the connector 45 further includes a pressure portion 41; the area of ​​the pressure portion 41 is larger than the portion of the elastic pressure member 44 that abuts against the connector 45, thereby increasing the pressure exerted on the connector 45 by the liquid outlet chamber 12 due to pressure changes, thus providing it with a greater actuating force, i.e., a preset pressure. The pressure portion 41 forms a pressure surface 411 and a contact surface 412 perpendicular to the pressure surface 411; the pressure surface 411 and the contact surface 412 constitute a cavity; the corrugated diaphragms 43 are all located outside the cavity. The pressure portion 41 is a block with a cavity, the pressure surface 411 is the bottom surface, and the contact surface 412 is the side surface. The pressure change in the outlet chamber 12 causes the corrugated diaphragm 43 to deform and come into contact with the contact surface 412, thereby preventing the corrugated diaphragm 43 from being partially located above the pressure section 41. This allows the liquid in the outlet chamber 12 to pass better through the corrugated diaphragm 43, so that the pressure section 41 is subjected to an upward preset pressure.

[0046] Specifically, the connector 45 also has a guide portion 42, which is a rod and is fixed to the top of the outlet chamber 12. The guide portion 42 is inserted into the cavity so that the pressure portion 41 is slidably connected to the guide portion 42; when the corrugated diaphragm 43 moves up or down, the guide portion 42 is always located in the cavity. The guide portion 42 is used to prevent the corrugated diaphragm 43 from deforming upwards due to excessively rapid increase in water pressure in the outlet chamber 12. This could easily cause the corrugated diaphragm 43 to deform upwards above the pressure portion 41. Therefore, by using the guide portion 42, the deformation of the corrugated diaphragm 43 will abut against the outside of the guide portion 42, thereby preventing the corrugated diaphragm 43 from reaching above the pressure portion 41.

[0047] In some embodiments, the resistance arm portion 32 and the power arm portion 31 at least partially overlap.

[0048] In other embodiments, the external force application mechanism 4 further includes an adjusting member for adjusting the preset external force applied by the elastic pressure member 44 to the corrugated diaphragm 43. The adjusting member can be a cylinder, an electric actuator, or a hydraulic cylinder. This allows the elastic pressure member 44 to be compressed to different degrees, enabling it to apply various preset external forces to the corrugated diaphragm 43. Alternatively, the adjusting member can be a bolt, threadedly connected to the regulating valve body 1, with the elastic pressure member 44 abutting against the bolt. Rotating the bolt allows the elastic pressure member 44 to apply different preset external forces to the corrugated diaphragm 43.

[0049] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A lever-operated self-regulating valve, comprising: The regulating valve body has an inlet chamber, an outlet chamber, and a connection port that connects the inlet chamber and the outlet chamber; The valve core is used to form a control port for controlling the flow rate at the connection port; Its features are, The self-operated regulating valve also includes: A lever mechanism has a power arm, a resistance arm, and a fulcrum; the valve core is disposed in the resistance arm; the length of the power arm is greater than the length of the resistance arm. An external force application mechanism includes at least a movable part that seals relative to the liquid outlet chamber and a pressure part that applies a preset external force to the movable part; the movable part is disposed in the power arm portion; The liquid outlet chamber is connected to at least an external control valve so that the liquid outlet chamber has at least a preset pressure state that can apply a preset pressure to the moving part; The resistance arm portion overlaps at least partially with the power arm portion.

2. The lever-operated self-regulating valve according to claim 1, characterized in that: When the valve core moves upward, the control port becomes larger; when the valve core moves downward, the control port becomes smaller. The external force application mechanism is located at the upper part of the regulating valve body, the valve core is located at the lower part of the regulating valve body, and the lever mechanism is located between the valve core and the external force application mechanism.

3. The lever-operated self-regulating valve according to claim 2, characterized in that: The external force application mechanism includes: a corrugated diaphragm and an elastic pressure member; the corrugated diaphragm is fixed to the inner wall of the liquid outlet chamber and forms an adjustment chamber that is sealed relative to the liquid outlet chamber; The elastic pressure member is disposed in the adjustment chamber, and the elastic pressure member is connected to the power arm portion through the corrugated diaphragm; Wherein, at least a portion of the corrugated diaphragm forms the moving part, and at least a portion of the elastic pressing member forms the pressing part.

4. The lever-operated self-regulating valve according to claim 3, characterized in that: The elastic pressure element is at least a spring or an elastic pad.

5. The lever-operated self-regulating valve according to claim 3, characterized in that: The external force application mechanism further includes a connector with at least a partially rigid portion, the rigid portion of which is fixed to the corrugated diaphragm; the elastic pressure member abuts against the rigid portion of the connector; The power arm portion is connected to the rigid portion of the connector.

6. The lever-operated self-regulating valve according to claim 5, characterized in that: The connector also has a pressure portion; the area of ​​the pressure portion is larger than the portion of the elastic pressure member that abuts against the connector.

7. The lever-operated self-regulating valve according to claim 6, characterized in that: The external force application mechanism further includes an adjustment component for adjusting the elastic pressure member to apply a preset external force to the corrugated diaphragm.

8. The lever-operated self-regulating valve according to claim 7, characterized in that: The pressure portion forms a pressure surface and a contact surface perpendicular to the pressure surface; The pressing surface and the contact surface form a cavity; the corrugated diaphragm is located outside the cavity.

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