Adjusting valve opening degree indicating device

Abstract

The invention provides a regulating valve opening indicating device. The regulating valve opening indicating device comprises a regulating valve structure, a regulating valve worm gear case, a main valve crank-link mechanism and an indicating mechanism. The indicating mechanism has the beneficial effects that the rotating center of the crank of the indicating mechanism is fixed on the valve shaft of the main valve crank connecting rod mechanism, the crank connecting rod of the indicating mechanism is an equal-proportion reduced version of the crank connecting rod of the main valve crank connecting rod mechanism, and the opening degree of the valve can be clearly known through the indicating mechanism on the worm gear case. In addition, a linear displacement sensor is additionally arranged, so that the opening degree (displacement) of the valve can be converted into an electric signal to be sent to an external PLC control system.

Description

Technical Field

[0001] The invention belongs to the field of regulating valves, and in particular relates to a regulating valve opening indicating device. Background Art

[0002] At present, the working principle of the control valve of the crank-connecting rod mechanism is to convert the rotation of the valve shaft into the linear motion of the piston through the crank-connecting rod mechanism. When the valve shaft speed is constant, the movement speed of the piston is fast at first and then slow. That is to say, the opening percentage of the drive device and the opening percentage of the valve are not in a linear relationship, which makes it impossible for the staff to clearly observe the opening indication of the control valve. This has certain problems in actual engineering applications. Summary of the invention

[0003] In view of this, the present invention aims to propose a regulating valve opening indication device to solve the problem in the above-mentioned prior art that the opening percentage and the valve opening percentage are not in a linear relationship, making it impossible for the staff to clearly observe the opening indication of the regulating valve.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows: A regulating valve opening indicating device comprises a regulating valve structure, a regulating valve worm gear box, a main valve crank-connecting rod mechanism and an indicating mechanism, wherein the main valve crank-connecting rod mechanism is installed inside the regulating valve structure, the regulating valve worm gear box is installed outside the regulating valve structure, the regulating valve worm gear box is installed to the outside of the regulating valve structure, one side of the regulating valve worm gear box is also connected to the indicating mechanism, and the regulating valve worm gear box is used to synchronously drive the main valve crank-connecting rod mechanism and the indicating mechanism.

[0005] Furthermore, the main valve crank-connecting rod mechanism includes a main crank, a main valve shaft, a main connecting rod and a main piston. One end of the main valve shaft is connected to the regulating valve worm gear box, the outside of the main valve shaft is sleeved with one end of the main crank, and the other end of the main crank is connected to the main piston through a main connecting rod.

[0006] Furthermore, the indicating mechanism includes an indicating crank, an indicating connecting rod and a pointer, all of which are located in the indicating housing. One end of the indicating crank is connected to one end of the main valve shaft, and the other end of the indicating crank is connected to the pointer through the indicating connecting rod.

[0007] Furthermore, an indicating slot is provided inside the indicating housing, the pointer is located in the indicating slot, and an indicating opening is provided on one side of the indicating slot.

[0008] Furthermore, a glass cover is installed on the surface of the indicating housing.

[0009] Furthermore, the indicating mechanism also includes a linear displacement sensor, which is installed on one side of the pointer.

[0010] Furthermore, the structure of the indicator crank is the same as that of the main crank, the structure of the indicator connecting rod is the same as that of the main connecting rod, and the combined structural size of the indicator crank and the indicator connecting rod is a proportionally reduced size of the combined structure of the main crank and the main connecting rod.

[0011] Furthermore, the regulating valve worm gear box includes a rotating wheel and a worm gear structure, the rotating wheel is installed on the worm of the worm gear structure, the worm gear structure is installed on the regulating valve structure through an outer shell cover, the worm wheel of the worm gear structure is sleeved on the main valve shaft, and the worm gear structure is used to drive the main valve shaft to rotate.

[0012] Compared with the prior art, the regulating valve opening indicating device of the present invention has the following advantages: The control valve opening indicating device of the present invention has a crank rotation center fixed on the valve shaft of the main valve crank connecting rod mechanism, and the crank connecting rod of the indicating mechanism is a proportionally reduced version of the crank connecting rod of the main valve crank connecting rod mechanism. The valve opening can be clearly known through the indicating mechanism on the worm gear box. In addition, the device adds a linear displacement sensor to convert the valve opening (displacement) into an electrical signal and send it to an external PLC control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings: Figure 1 A schematic diagram of a cross-sectional view of the overall structure according to an embodiment of the present invention; Figure 2 A second schematic diagram of a cross-sectional view of the overall structure according to an embodiment of the present invention; Figure 3 A schematic diagram of the overall structural state of an embodiment of the present invention; Figure 4 This is a schematic diagram of the second overall structural state according to an embodiment of the present invention; Figure 5 It is a schematic diagram of the state of the overall structure plus the linear displacement sensor according to an embodiment of the present invention; Figure 6 It is a schematic diagram of the second state of the overall structure plus the linear displacement sensor according to an embodiment of the present invention.

[0014] Description of reference numerals: 1. Control valve structure; 2. Control valve worm gear box; 21. Rotor; 22. Worm gear structure; 3. Main valve crank-connecting rod mechanism; 31. Main crank; 32. Main valve shaft; 33. Main connecting rod; 34. Main piston; 4. Indicator mechanism; 41. Indicator crank; 42. Indicator connecting rod; 43. Pointer; 44. Indicator housing; 441. Indicator slide; 442. Indicator opening; 45. Linear displacement sensor. DETAILED DESCRIPTION

[0015] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0016] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0017] 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0018] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0019] like Figures 1 to 6 As shown, the regulating valve opening indicating device includes a regulating valve structure 1, a regulating valve worm gear box 2, a main valve crank-connecting rod mechanism 3 and an indicating mechanism 4. The main valve crank-connecting rod mechanism 3 is installed inside the regulating valve structure 1, and the regulating valve worm gear box 2 is installed outside the regulating valve structure 1. The regulating valve worm gear box 2 is installed to the outside of the regulating valve structure 1. The indicating mechanism 4 is also connected to one side of the regulating valve worm gear box 2. The regulating valve worm gear box 2 is used to synchronously drive the main valve crank-connecting rod mechanism 3 and the indicating mechanism 4.

[0020] The present invention installs a small crank-connecting rod mechanism, namely, indicating mechanism 4, on the regulating valve worm gear box 2. The crank rotation center of indicating mechanism 4 is fixed on the valve shaft of the main valve crank-connecting rod mechanism 3. The small crank-connecting rod mechanism is a proportionally reduced version of the main valve crank-connecting rod mechanism 3. The valve opening can be clearly known through the indicating mechanism 4 on the worm gear box. In addition, the present invention adds a linear displacement sensor 45 to convert the valve opening (displacement) into an electrical signal and send it to an external PLC control system.

[0021] In a preferred embodiment of the present invention, the main valve crank-connecting rod mechanism 3 includes a main crank 31, a main valve shaft 32, a main connecting rod 33 and a main piston 34, one end of the main valve shaft 32 is connected to the regulating valve worm gear box 2, the outside of the main valve shaft 32 is sleeved with one end of the main crank 31, and the other end of the main crank 31 is connected to the main piston 34 through the main connecting rod 33. In this embodiment, the regulating valve worm gear box 2 drives the main valve shaft 32 to rotate, and the rotation of the main valve shaft 32 drives the main crank 31 to rotate, and the rotation of the main crank 31 pushes the main connecting rod 33 connected to the main piston 34 to move in the regulating valve structure 1 (in order to avoid interfering with the movement of the main connecting rod 33 connected to the main piston 34 in the regulating valve structure 1, the main crank 31 and the main connecting rod 33 are not fixedly connected, and the connection between the main connecting rod 33 and the main piston 34 is not fixedly connected. The connection between the main connecting rod 33 and the main piston 34 is a rotating connection with sliding, and can also be other connection methods, which can play the role of the main crank 31 rotating to push the main connecting rod 33 connected to the main piston 34 to move in the regulating valve structure 1), thereby realizing the opening and closing of the valve.

[0022] In a preferred embodiment of the present invention, the indicating mechanism 4 includes an indicating crank 41, an indicating connecting rod 42 and a pointer 43, all of which are located in an indicating housing 44. One end of the indicating crank 41 is connected to one end of the main valve shaft 32, and the other end of the indicating crank 41 is connected to the pointer 43 through the indicating connecting rod 42. An indicating slot 441 is provided inside the indicating housing 44, and the pointer 43 is located in the indicating slot 441. An indicating opening 442 is also provided on one side of the indicating slot 441. In this embodiment, the indicating crank 41 rotates as the main valve shaft 32 rotates. The indicating crank 41 rotates so that the indicating connecting rod 42 can push the pointer 43 to move forward and backward in the indicating slot 441. In addition, in order to avoid the indicating slot 441 interfering with the movement of the pointer 43, the width of the indicating slot 441 can be set to prevent the indicating slot 441 from interfering with the movement of the pointer 43.

[0023] In a preferred embodiment of the present invention, the indicating mechanism 4 also includes a linear displacement sensor 45, which is installed on one side of the pointer 43. In actual use, the linear displacement sensor 45 can move with the pointer 43 to convert the valve opening (displacement) into an electrical signal and send it to an external PLC control system.

[0024] In a preferred embodiment of the present invention, the structure of the indicator crank 41 is the same as that of the main crank 31, the structure of the indicator connecting rod 42 is the same as that of the main connecting rod 33, and the combined structural size of the indicator crank 41 and the indicator connecting rod 42 is a proportionally reduced size of the combined structure of the main crank 31 and the main connecting rod 33. In this embodiment, the purpose of setting the combined structural size of the indicator crank 41 and the indicator connecting rod 42 to be a proportionally reduced size of the combined structure of the main crank 31 and the main connecting rod 33 is to facilitate the staff to clearly observe the opening of the valve.

[0025] In a preferred embodiment of the present invention, a glass cover may be installed on the surface of the indicating housing 44 to facilitate the staff to observe the valve opening in real time.

[0026] In a preferred embodiment of the present invention, the regulating valve worm gear box 2 includes a rotating wheel 21 and a worm gear structure 22, the rotating wheel 21 is mounted on the worm of the worm gear structure 22, the worm gear structure 22 is mounted on the regulating valve structure 1 through the outer shell cover, the worm wheel of the worm gear structure 22 is sleeved on the main valve shaft 32, and the worm gear structure 22 is used to drive the main valve shaft 32 to rotate. In actual use, other structures can also replace the worm gear structure 22, and it can also be an electric method, as long as it can achieve the purpose of driving the main valve shaft 32 to rotate.

[0027] Working principle of regulating valve opening indicating device: In actual use, the staff rotates the rotating wheel 21, and the rotation of the rotating wheel 21 drives the worm of the worm gear structure 22 to rotate, and the rotation of the worm of the worm gear structure 22 drives the worm wheel of the worm gear structure 22 to rotate, and the rotation of the worm wheel of the worm gear structure 22 drives the main valve shaft 32 to rotate, so as to realize the observation of the valve opening.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A regulating valve opening indicating device, characterized in that: The invention comprises a regulating valve structure (1), a regulating valve worm gear box (2), a main valve crank connecting rod mechanism (3) and an indicating mechanism (4), wherein the main valve crank connecting rod mechanism (3) is installed inside the regulating valve structure (1), the regulating valve worm gear box (2) is installed outside the regulating valve structure (1), the regulating valve worm gear box (2) is installed to the outside of the regulating valve structure (1), one side of the regulating valve worm gear box (2) is also connected to the indicating mechanism (4), and the regulating valve worm gear box (2) is used to synchronously drive the main valve crank connecting rod mechanism (3) and the indicating mechanism (4).

2. The regulating valve opening indicating device according to claim 1, characterized in that: The main valve crank-connecting rod mechanism (3) comprises a main crank (31), a main valve shaft (32), a main connecting rod (33) and a main piston (34); one end of the main valve shaft (32) is connected to the regulating valve worm gear box (2); the outside of the main valve shaft (32) is sleeved with one end of the main crank (31); and the other end of the main crank (31) is connected to the main piston (34) via the main connecting rod (33).

3. The regulating valve opening indicating device according to claim 1, characterized in that: The indicating mechanism (4) comprises an indicating crank (41), an indicating connecting rod (42) and a pointer (43) all located in an indicating housing (44); one end of the indicating crank (41) is connected to one end of the main valve shaft (32); and the other end of the indicating crank (41) is connected to the pointer (43) via the indicating connecting rod (42).

4. The regulating valve opening indicating device according to claim 3, characterized in that: An indicating slot (441) is provided inside the indicating housing (44), the pointer (43) is located in the indicating slot (441), and an indicating opening (442) is provided on one side of the indicating slot (441).

5. The regulating valve opening indicating device according to claim 3, characterized in that: A glass cover is installed on the surface of the indicating housing (44).

6. The regulating valve opening indicating device according to claim 3, characterized in that: The indicating mechanism (4) further comprises a linear displacement sensor (45), and the linear displacement sensor (45) is mounted on one side of the pointer (43).

7. The regulating valve opening indicating device according to claim 3, characterized in that: The structure of the indicating crank (41) is the same as that of the main crank (31), the structure of the indicating connecting rod (42) is the same as that of the main connecting rod (33), and the combined structural dimensions of the indicating crank (41) and the indicating connecting rod (42) are proportionally reduced dimensions of the combined structural dimensions of the main crank (31) and the main connecting rod (33).

8. The regulating valve opening indicating device according to claim 1, characterized in that: The regulating valve worm gear box (2) comprises a rotating wheel (21) and a worm gear structure (22), wherein the rotating wheel (21) is mounted on the worm of the worm gear structure (22), the worm gear structure (22) is mounted on the regulating valve structure (1) through an outer shell cover, the worm wheel of the worm gear structure (22) is sleeved on the main valve shaft (32), and the worm gear structure (22) is used to drive the main valve shaft (32) to rotate.

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