Valve Automatic Adjustment Device

Abstract

The present invention provides a valve automatic adjustment device, which includes a base, a linear stroke adjustment mechanism for adjusting and controlling the opening degree of a pilot valve, a driving motor, and a transmission component. The driving motor is arranged on the base; the transmission component includes a driving gear sleeved on the output shaft of the driving motor and a driven gear meshing with the driving gear. The linear stroke adjustment mechanism includes a nut sleeve, an adjustment screw meshing with the nut sleeve, and a limiting component for restricting the circumferential rotation of the adjustment screw. The nut sleeve is rotatably installed on the base, the driven gear is sleeved on the nut sleeve, the adjustment screw is arranged through the thread hole of the nut sleeve, a through hole for the adjustment screw to pass through is provided on the base, one end of the adjustment screw is movably connected with the limiting component, and the other end of the adjustment screw passes through the through hole on the base and is connected with the pilot valve. The present invention solves the problems that the valve of the water supply pipeline relies on manual operation for adjustment, resulting in inconvenient operation and low adjustment and control accuracy.

Description

Technical Field

[0001] The present invention belongs to the technical field of pipeline pressure detection, and more specifically, relates to a valve automatic adjustment device. Background Art

[0002] When water supply enterprises supply water to each water supply point, control valves for controlling water flow rate and water pressure need to be installed on the water supply pipeline to ensure the balance of water supply pressure and water supply safety in the water supply pipeline behind the pilot-operated control valve. The existing control valve structures include direct-acting and pilot-operated types. The pilot-operated control valve is usually applied to the main water supply pipeline system with relatively high pipeline pressure to regulate and control the water flow rate and water pressure in the water supply pipeline behind the pilot-operated control valve. However, the existing pilot-operated control valve relies on workers to manually operate and adjust on-site according to personal experience, making it difficult to accurately control the opening degree of the pilot-operated control valve. There are problems of inconvenient operation and low adjustment and control accuracy, often resulting in insufficient water supply flow or unbalanced water supply pressure, and easily causing potential safety hazards of pipe explosion due to excessive pressure in the water supply pipeline behind the pilot-operated control valve. Summary of the Invention

[0003] An object of the present invention is to provide a valve automatic adjustment device, aiming to solve the problems of inconvenient operation and low adjustment and control accuracy existing in the prior art that the pilot-operated control valve of the water supply pipeline relies on workers to manually operate and adjust on-site according to personal experience.

[0004] To achieve the above object, the technical solution adopted by the present invention is to provide a valve automatic adjustment device, including a base, a direct stroke adjustment mechanism for adjusting and controlling the opening degree of a pilot valve, a drive motor for driving the direct stroke adjustment mechanism to perform a linear reciprocating motion, and a transmission component. The drive motor is arranged on the base; the direct stroke adjustment mechanism includes a nut sleeve, an adjustment screw meshed and cooperated with the nut sleeve, and a limit component for restricting the circumferential rotation of the adjustment screw. The nut sleeve is rotatably installed on the base, the limit component is installed on the base above the corresponding nut sleeve. The nut sleeve has a thread hole penetrating in the radial direction, the adjustment screw is disposed through the thread hole, and a through hole for the adjustment screw to pass through is provided on the base. One end of the adjustment screw is movably connected to the limit component, and the other end of the adjustment screw passes through the through hole and is used to be connected to the pilot valve; the transmission component includes a driving gear and a driven gear meshed and cooperated with the driving gear. The driving gear is sleeved on the output shaft of the drive motor, and the driven gear is sleeved on the nut sleeve.

[0005] Further, the nut sleeve includes a convex ring and a necking sleeve connected to the convex ring. An internal thread that meshes with the adjusting screw is provided in the necking sleeve. A plain bearing is provided between the convex ring and the limiting component. The adjusting screw sequentially passes through the plain bearing and the necking sleeve.

[0006] Further, a bearing sleeve is sleeved on the necking sleeve. The driven gear is sleeved on the bearing sleeve. At least one positioning bearing is sleeved on the bearing sleeve, and the positioning bearings are sequentially arranged along the radial direction of the bearing sleeve.

[0007] Further, the internal thread of the nut sleeve is set as a T-shaped thread, and the external thread of the adjusting screw meshes with the T-shaped thread.

[0008] Further, a positioning sleeve for positioning the adjusting screw is provided at a position corresponding to the through hole on the base, and the adjusting screw is slidably inserted into the positioning sleeve.

[0009] Further, the positioning sleeve includes a sleeve portion and a fixing portion extending radially along the sleeve portion. The fixing portion is provided on the base. One end of the sleeve portion away from the fixing portion extends to the bottom end of the nut sleeve, and the adjusting screw is slidably inserted into the sleeve portion.

[0010] Further, a groove for installing a sealing ring is provided on the portion of the adjusting screw inserted into the sleeve portion, and a sealing ring is provided in the groove.

[0011] Further, the limiting component includes a limiting block and a positioning pin installed on the base directly above the nut sleeve. The positioning pin is provided at one end of the adjusting screw away from the base, and the positioning pin is connected to the adjusting screw at a right angle. The limiting block is provided with a limiting groove for accommodating the positioning pin, and the positioning pin is movably arranged in the limiting groove.

[0012] Further, the valve automatic adjustment device further includes a potentiometer for determining the position of the adjusting screw, and the transmission component is connected to the potentiometer.

[0013] Further, the drive motor adopts a stepper motor.

[0014] The beneficial effects of the valve automatic adjustment device provided by the present invention are as follows: Compared with the prior art, for the valve automatic adjustment device provided by the present invention, by driving the nut sleeve rotatably mounted on the base by a driving motor, under the cooperation of the nut sleeve and the adjustment screw, only by controlling the forward and reverse rotation of the driving motor through a controller, the adjustment screw can make a linear reciprocating direct stroke movement along the radial direction of the nut sleeve, accurately adjust and control the opening degree of the pilot valve installed on the water supply pipeline, achieve the purpose of accurately adjusting and controlling the water flow rate and water pressure of the water supply pipeline behind the pilot valve, realize the automation of the operation of the water supply pipeline valve, solve the problem that the valve of the water supply pipeline relies on workers to manually operate and adjust on-site according to personal experience, it is difficult to accurately control the opening degree of the pilot control valve, and there are problems of inconvenient operation and low adjustment and control accuracy, achieve the balance of the water supply flow rate and water supply pressure, and effectively eliminate the potential safety hazard of pipe explosion due to excessive pressure in the water supply pipeline behind the pilot control valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a partial sectional structural schematic diagram of the valve automatic adjustment device provided by the embodiment of the present invention;

[0017] Figure 2 It is a three-dimensional structural schematic diagram of the valve automatic adjustment device provided by the embodiment of the present invention;

[0018] Figure 3 It is an exploded structural schematic diagram of the valve automatic adjustment device provided by the embodiment of the present invention.

[0019] Among them, the main reference signs in each drawing are as follows:

[0020] 1 - Base; 2 - Direct stroke adjustment mechanism; 21 - Nut sleeve; 211 - Convex ring; 212 - Necking sleeve; 22 - Adjustment screw; 23 - Limit component; 231 - Limit block; 232 - Positioning pin; 233 - Limit groove; 3 - Driving motor; 4 - Transmission component; 41 - Driving gear; 42 - Driven gear; 5 - Plain bearing; 6 - Bearing sleeve; 7 - Positioning bearing; 8 - Positioning sleeve; 81 - Sleeve part; 82 - Fixed part; 9 - Sealing ring; 10 - Potentiometer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0023] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined. "Several" means one or more unless otherwise specifically defined.

[0024] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0025] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Please refer to Figures 1 to 3, the automatic valve regulating device provided by the present invention will be described below. The automatic valve regulating device provided by the embodiments of the present invention includes a base 1, a linear stroke regulating mechanism 2 for regulating and controlling the opening degree of a pilot valve (the opening and closing degree of a pilot-operated control valve), and a driving motor 3 and a transmission component 4 for driving the linear stroke regulating mechanism 2 to perform a linear reciprocating motion. The driving motor 3 is arranged on the base 1; the linear stroke regulating mechanism 2 includes a nut sleeve 21, an adjusting screw rod 22 meshed and cooperated with the nut sleeve 21, and a limiting component 23 for restricting the circumferential rotation of the adjusting screw rod 22. The nut sleeve 21 is rotatably installed on the base 1, and the limiting component 23 is installed above the corresponding nut sleeve 21 on the base 1. The nut sleeve 21 has a thread hole penetrating along the radial direction, and the adjusting screw rod 22 is penetrated and arranged in the thread hole of the nut sleeve 21. A through hole for the adjusting screw rod 22 to pass through is arranged on the base 1, and the position of the through hole on the base 1 corresponds to the thread hole of the nut sleeve 21. One end of the adjusting screw rod 22 is movably connected to the limiting component 23, and the other end of the adjusting screw rod 22 passes through the through hole on the base 1 and is used for connecting with the regulating valve rod of the pilot valve; the transmission component 4 includes a driving gear 41 and a driven gear 42 meshed and cooperated with the driving gear 41. The driving gear 41 is sleeved on the output shaft of the driving motor 3, and the driven gear 42 is sleeved on the nut sleeve 21.

[0027] The basic working principle of the automatic valve regulating device provided by the embodiments of the present invention: When the driving motor 3 is powered on, the controller sends a control instruction to control the rotation of the output shaft of the driving motor 3. The driving gear 41 on the output shaft of the driving motor 3 drives the driven gear 42 to rotate, and the driven gear 42 drives the nut sleeve 21 rotatably installed on the base 1 to rotate. Since the adjusting screw rod 22 penetrating through the thread hole of the nut sleeve 21 cannot rotate circumferentially under the limiting action of the limiting member, and the adjusting screw rod 22 is prevented from generating a large torque to damage the pilot valve. Under the meshing and cooperation of the thread hole of the nut sleeve 21 and the external thread of the adjusting screw rod 22, only by controlling the forward and reverse rotation of the driving motor 3 through the controller, the adjusting screw rod 22 can perform a linear reciprocating linear stroke motion along the radial direction of the nut sleeve 21, so that the pilot valve can be opened or closed through the adjusting screw rod 22 performing a linear stroke motion along the radial direction of the nut sleeve 21.

[0028] Preferably, the driving motor 3 is a stepping motor that controls the angular displacement amount by controlling the number of pulses to achieve accurate positioning. Not only can the driving motor 3 drive the adjusting screw rod 22 to control the opening and closing of the pilot valve, but also the driving motor 3 can drive the adjusting screw rod 22 to accurately adjust and control the opening degree of the pilot valve, so as to accurately adjust and control the water flow rate and water pressure of the water supply pipeline behind the pilot valve (pilot-operated control valve).

[0029] Compared with the prior art, the valve automatic adjustment device provided by the present invention drives the nut sleeve 21 rotatably mounted on the base 1 to rotate through the driving motor 3. With the cooperation of the nut sleeve 21 and the adjusting screw 22, only by controlling the forward and reverse rotation of the driving motor 3 through the controller, the adjusting screw 22 can make a linear reciprocating direct stroke movement along the radial direction of the nut sleeve 21, accurately adjust and control the opening degree of the pilot valve installed on the water supply pipeline, achieve the purpose of accurately adjusting and controlling the water flow rate and water pressure of the water supply pipeline behind the pilot valve, realize the automation of the operation of the water supply pipeline valve, solve the problems that the water supply pipeline valve relies on workers to manually operate and adjust on site according to personal experience, it is difficult to accurately control the opening degree of the pilot control valve, and there are problems of inconvenient operation and low adjustment and control accuracy, achieve the balance of the water supply flow rate and water supply pressure, and effectively eliminate the potential safety hazard of pipe explosion due to excessive pressure in the water supply pipeline behind the pilot control valve.

[0030] Further, please refer to Figure 1 simultaneously. As a specific embodiment of the valve automatic adjustment device provided by the present invention, the nut sleeve 21 includes a convex ring 211 and a necking sleeve 212 connected to the convex ring 211. An internal thread meshing with the adjusting screw 22 is provided inside the necking sleeve 212. A flat bearing 5 is provided between the convex ring 211 and the limiting component 23. The adjusting screw 22 passes through the flat bearing 5 and the necking sleeve 212 in sequence. A flat bearing 5 is provided between the convex ring 211 and the limiting component 23 to reduce the friction generated between the T-shaped nut sleeve 21 and the limiting component 23 during rotation, enhance the flexibility of the rotation of the nut sleeve 21, and improve the adjustment and control accuracy of the valve automatic adjustment device.

[0031] Preferably, the convex ring 211 and the necking sleeve 212 are integrally formed to form a T-shaped nut sleeve 21 with a T-shaped longitudinal section of the nut sleeve 21 to enhance the structural stability of the nut sleeve 21.

[0032] Further, please refer to Figure 3 simultaneously. As a specific embodiment of the valve automatic adjustment device provided by the present invention, a bearing sleeve 6 is sleeved on the necking sleeve 212 of the nut sleeve 21. The driven gear 42 is sleeved on the bearing sleeve 6, and at least one positioning bearing 7 is sleeved on the bearing sleeve 6. The positioning bearings 7 are arranged in sequence along the radial direction of the bearing sleeve 6. The bearing sleeve 6 and the multiple positioning bearings 7 cooperating with the bearing sleeve 6 are provided on the necking sleeve 212 of the nut sleeve 21, which can not only enhance the flexibility of the rotation of the nut sleeve 21, but also ensure the concentricity of the nut sleeve 21 when rotating around its central axis, prevent the nut sleeve 21 from having a slight angular deflection during rotation, and improve the adjustment and control accuracy of the valve automatic adjustment device.

[0033] Further, please refer to Figure 1, as a specific embodiment of the valve automatic adjustment device provided by the present invention, the internal thread of the nut sleeve 21 is set as a T-shaped thread, and the external thread of the adjusting screw rod 22 meshes with the T-shaped thread of the nut sleeve 21. Setting the internal thread of the nut sleeve 21 as a T-shaped thread improves the matching accuracy and rotational flexibility between the adjusting screw rod 22 and the nut sleeve 21, and overcomes the defect that the ordinary thread for driving the adjusting screw rod 22 is easily worn, resulting in a gradual increase in the gap between the screw thread holes of the adjusting screw rod 22 and the nut sleeve 21, and reducing the stability and adjustment accuracy.

[0034] Further, please refer to Figure 1 , as a specific embodiment of the valve automatic adjustment device provided by the present invention, a positioning sleeve 8 for positioning the adjusting screw rod 22 is provided at the position corresponding to the through hole on the base 1. The adjusting screw rod 22 is slidably inserted into the sleeve hole of the positioning sleeve 8 and is connected to the adjusting valve rod of the pilot valve to ensure good concentricity when the adjusting screw rod 22 makes a linear motion, and prevent one end of the adjusting screw rod 22 for connecting the adjusting valve rod of the pilot valve. When making a linear stroke motion, slight yaw occurs, affecting the adjustment control accuracy of the valve automatic adjustment device, and at the same time enhancing the stable reliability of the adjusting screw rod 22 for adjusting and controlling the pilot valve.

[0035] Further, please refer to Figure 1 , as a specific embodiment of the valve automatic adjustment device provided by the present invention, the positioning sleeve 8 includes a sleeve portion 81 and a fixing portion 82 extending radially along the sleeve portion 81. The fixing portion 82 is provided on the base 1, and one end of the sleeve portion 81 away from the fixing portion 82 extends to the bottom end of the nut sleeve 21. The adjusting screw rod 22 is slidably inserted into the sleeve portion 81 of the positioning sleeve 8 and is connected to the adjusting valve rod of the pilot valve to ensure good concentricity between the adjusting screw rod 22 and the central axis of the nut sleeve 21 when making a linear motion, and prevent slight angular yaw from occurring when the nut sleeve 21 rotates, affecting the adjustment control accuracy of the valve automatic adjustment device, and at the same time enhancing the stable reliability of the adjusting screw rod 22 for adjusting and controlling the pilot valve.

[0036] Further, please refer to Figure 1 , as a specific embodiment of the valve automatic adjustment device provided by the present invention, a groove for installing a sealing ring 9 is provided on the part of the adjusting screw rod 22 inserted into the sleeve portion 81, and a sealing ring 9 for enhancing the connection sealing between the adjusting screw rod 22 and the sleeve portion 81 is provided in the groove. The setting of the sealing ring 9 can enhance the sealing between the adjusting screw rod 22 and the positioning sleeve 8, prevent high-pressure water from infiltrating into the nut sleeve 21, causing phenomena such as slipping or rusting, affecting the high-precision matching between the adjusting screw rod 22 and the nut sleeve 21, and reducing the stable reliability and accuracy of the adjusting screw rod 22 for adjusting and controlling the pilot valve.

[0037] Further, please refer to Figure 1, as a specific embodiment of the valve automatic adjustment device provided by the present invention, the limit assembly 23 includes a limit block 231 and a positioning pin 232 installed directly above the corresponding nut sleeve 21 on the base 1. A positioning pin 232 is provided at one end of the adjusting screw 22 away from the base 1, and the positioning pin 232 is connected to the adjusting screw 22 at a right angle. The limit block 231 is provided with a limit groove 233 for accommodating the positioning pin 232, and the positioning pin 232 is movably arranged in the limit groove 233. Under the action of the positioning pin 232 and the limit groove 233 of the limit block 231, the adjusting screw 22 cannot rotate circumferentially around its central axis but can only reciprocate linearly along its axial direction, avoiding the adjusting screw 22 generating a large torque under the drive of the rotation of the nut sleeve 21 and causing damage to the pilot valve, and reducing the stability, reliability and accuracy of the adjusting screw 22 in adjusting and controlling the pilot valve.

[0038] Further, please refer to Figure 2 and Figure 3 , as a specific embodiment of the valve automatic adjustment device provided by the present invention, it further includes a potentiometer 10 for determining the position of the adjusting screw 22, and the transmission assembly 4 and the potentiometer 10. The setting of the potentiometer 10, which positions the zero position of the driving motor 3 and calculates the number of turns of the output shaft of the driving motor 3, can effectively prevent the output shaft of the driving motor 3 from rotating too many turns (causing the nut sleeve 21 and the adjusting screw 22 to disengage) and affecting the adjustment function of the automatic adjustment device, and can eliminate the cumulative error of the driving motor 3 to improve the stability, reliability and accuracy of the driving motor 3 in driving the adjusting screw 22 to adjust and control the pilot valve.

[0039] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic valve regulating device, characterized in that: It includes a base, a linear stroke adjustment mechanism for adjusting the opening degree of a control pilot valve, a drive motor and a transmission component for driving the linear stroke adjustment mechanism to perform linear reciprocating motion. The drive motor is arranged on the base. The linear stroke adjustment mechanism includes a nut sleeve, an adjustment screw rod meshed and cooperated with the nut sleeve, and a limit component for restricting circumferential rotation of the adjustment screw rod. The nut sleeve is rotatably installed on the base. The limit component is installed on the base above the corresponding nut sleeve. The nut sleeve has a thread hole penetrating radially. The adjustment screw rod is arranged through the thread hole. A through hole for the adjustment screw rod to pass through is arranged on the base. One end of the adjustment screw rod is movably connected with the limit component. The other end of the adjustment screw rod passes through the through hole and is used to be connected with the pilot valve. The transmission component includes a driving gear and a driven gear meshed and cooperated with the driving gear. The driving gear is sleeved on the output shaft of the drive motor. The driven gear is sleeved on the nut sleeve. The limit component includes a limit block and a positioning pin installed on the base directly above the corresponding nut sleeve. The positioning pin is arranged at one end of the adjustment screw rod away from the base and is connected with the adjustment screw rod at a right angle. The limit block is provided with a limit groove for accommodating the positioning pin. The positioning pin is movably arranged in the limit groove. The axis of the output shaft of the drive motor is parallel and non-coincident with the axis of the adjustment screw rod. The internal thread of the nut sleeve is set as a T-shaped thread, and the external thread of the adjustment screw rod is meshed and cooperated with the T-shaped thread. The valve automatic adjustment device adjusts and controls the opening degree of a pilot valve installed on a water supply pipeline.

2. The valve automatic adjustment device according to claim 1, characterized in that: The nut sleeve includes a convex ring and a necking sleeve connected with the convex ring. The internal thread meshed and cooperated with the adjustment screw rod is arranged in the necking sleeve. A plain bearing is arranged between the convex ring and the limit component. The adjustment screw rod sequentially passes through the plain bearing and the necking sleeve.

3. The valve automatic adjustment device according to claim 2, characterized in that: A bearing sleeve is sleeved on the necking sleeve. The driven gear is sleeved on the bearing sleeve. At least one positioning bearing is sleeved on the bearing sleeve. Each positioning bearing is sequentially arranged along the radial direction of the bearing sleeve.

4. The valve automatic adjustment device according to claim 1, characterized in that: A positioning sleeve for positioning the adjustment screw rod is arranged on the base at the position corresponding to the through hole. The adjustment screw rod is slidably inserted into the positioning sleeve.

5. The valve automatic adjustment device according to claim 4, characterized in that: The positioning sleeve includes a sleeve part and a fixing part extending radially along the sleeve part. The fixing part is arranged on the base. One end of the sleeve part away from the fixing part extends to the bottom end of the nut sleeve. The adjustment screw rod is slidably inserted into the sleeve part.

6. The valve automatic adjustment device according to claim 5, characterized in that: A groove for installing a sealing ring is arranged on the part of the adjustment screw rod inserted into the sleeve part. A sealing ring is arranged in the groove.

7. The valve automatic adjustment device according to claim 1, characterized in that: The valve automatic adjustment device further includes a potentiometer for determining the position of the adjustment screw rod. The transmission component is connected with the potentiometer.

8. The valve automatic adjustment device according to any one of claims 1 to 7, characterized in that: The drive motor adopts a stepping motor.

Images