Driving device of regulating valve

Abstract

The utility model relates to the technical field of adjusting valve accessories, in particular to a driving device of an adjusting valve. The driving device of the regulating valve solves the technical problems that in the prior art, a driving device for the regulating valve is complex in structure and not easy to maintain. A driving device of a regulating valve comprises a valve rod reciprocating along a straight line and a driving assembly driving the valve rod, and the driving assembly comprises a driving arm driving the valve rod to move; the driving arm is arranged, the distance from the rotating center of the driving arm to the first sliding column is smaller than the distance from the rotating center of the driving arm to the second sliding column, and the driving arm forms a lever mechanism, so that large driving power is not needed in the displacement process of the sliding seat. Due to the fact that the sliding seat is driven by the lead screw to move, the lead screw is matched with the screw hole to achieve self-locking performance, the valve rod can be positioned at the target position without an independent locking mechanism after moving to the target position, the structure of the driving device is simplified, and the driving device is easy to maintain.

Description

TECHNICAL FIELD

[0001] The utility model relates to adjusting valve accessory technical field especially, it relates to a kind of drive device of adjusting valve. BACKGROUND

[0002] Adjusting valve is also named control valve, in industrial automation process control field, by accepting the control signal output of adjusting control unit, with the help of power operation, change medium flow, pressure, temperature, liquid level etc. The final control element of process parameter, adjusting valve is different according to different kinds of work requirements.

[0003] The adjusting valve in prior art, its valve cover is installed on valve body, the top of valve cover is fixed with actuating mechanism, the output shaft of actuating mechanism is connected with driving rod, driving rod is connected with valve rod, driving valve rod to lift, realize the control function of adjusting valve.But the valve rod in prior art is usually directly driven by electromagnet or motor, this driving mode can satisfy the demand of control valve rod, but, in use process, since valve rod is directly driven by electromagnet or motor, complex locking mechanism needs to be set to lock valve rod at target position after valve rod displacement to target position, cause the driving mechanism of control valve to be very complex, further cause the driving mechanism of control valve to be not easy to maintain.

[0004] Therefore, the driving device for adjusting valve in prior art has the technical problems of complex structure and not easy to maintain. SUMMARY

[0005] The driving device of adjusting valve provided by the utility model solves the technical problems of the driving device for adjusting valve in prior art, such as complex structure and not easy to maintain.

[0006] Some embodiments for solving the above technical problems include:

[0007] A kind of drive device of adjusting valve, including the valve rod of linear reciprocating motion and the drive component of driving the valve rod, the drive component includes the drive arm of the valve rod displacement drive;

[0008] The drive component further includes base, the drive arm is rotatably connected to the base, the valve rod is slidably connected to the drive arm by first slide post, the base is further provided with the drive mechanism of driving the drive arm, the drive mechanism includes the slide base slidably disposed in the base, the sliding direction of the slide base is parallel to the sliding direction of the valve rod, the slide base is slidably connected to the drive arm by second slide post, the distance from the rotation center of the base to the first slide post of the drive arm is less than the distance from the rotation center of the base to the second slide post of the drive arm;

[0009] The base is provided with lead screw for driving the slide base displacement, and the slide base is provided with a screw hole matched with the lead screw.

[0010] Preferably, the base is further provided with a support seat, the driving arm is rotatably connected to the support seat through a rotating shaft, and the support seat is in an integral structure with the base.

[0011] Preferably, the support seat is provided with a correction groove for correcting the position of the driving arm relative to the support seat, a part of the driving arm is located in the correction groove, and the opposite two side walls of the correction groove are provided with shaft holes matched with the rotating shaft.

[0012] Preferably, the rotating shaft is provided with limiting blocks at both ends of the rotating shaft to prevent the rotating shaft from being separated from the shaft hole, and the limiting blocks are welded to the rotating shaft.

[0013] Preferably, the base is further provided with a motor for driving the lead screw, the output shaft of the motor is in an integral structure with the lead screw, and the output shaft of the motor is coaxially arranged with the lead screw.

[0014] Preferably, the base is further provided with a guide column, the guide column is provided with a guide groove, a part of the sliding seat is located in the guide groove, and the guide column is in an integral structure with the base.

[0015] Preferably, the side of the sliding seat away from the guide column is provided with a convex plate, the convex plate is in an integral structure with the sliding seat, and the screw hole is arranged on the convex plate.

[0016] Preferably, a rib plate is arranged between the convex plate and the sliding seat to increase the connection strength of the convex plate and the sliding seat.

[0017] Preferably, the driving arm is respectively provided with a first slot matched with the first sliding column and a second slot matched with the second sliding column, and the first sliding column is welded to the valve rod.

[0018] Preferably, the driving arm is further provided with a clearance groove for preventing the valve rod from interfering with the driving arm, the clearance groove is long strip-shaped, the clearance groove is communicated with the first slot, and the clearance groove is in a clearance fit with the outer circle of the valve rod.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] By setting the driving arm, and the distance from the rotation center of the driving arm to the first slide is less than the distance from the rotation center of the driving arm to the second slide, the driving arm forms a lever mechanism, when the valve stem needs to be driven to displace, the slide drives the valve stem to displace through the driving arm, so that the slide does not need large driving power during displacement. At the same time, since the slide is driven to displace by the screw rod, the screw rod and the screw hole have self-locking property, and the valve stem can be positioned at the target position without setting an independent locking mechanism after displacement, which simplifies the structure of the driving device and makes the driving device easy to maintain. In addition, since the driving arm drives the valve stem to displace by using the lever principle, the driving arm has the function of locking the valve stem, and the valve stem is not easy to malfunction during use, thereby improving the stability of the valve stem.

[0021] By setting the first slide and the second slide, the first slide is used to convert the rotary motion of the driving arm into the linear motion of the valve stem, that is, the first slide is used to divide the force of the driving arm into two components, one of which drives the valve stem to displace, and when the valve stem malfunctions, it drives the driving arm to rotate, which requires greater force. Therefore, during use, the valve stem is not easy to drive the driving arm to malfunction, thereby making the valve stem not easy to malfunction and improving the stability of the regulating valve.

[0022] By setting the screw rod, the screw rod and the screw hole have self-locking property, and the slide does not need to set an independent locking mechanism after displacement, which further simplifies the structure of the driving device and makes the driving device easy to maintain. BRIEF DESCRIPTION OF DRAWINGS

[0023] For the purpose of explanation, several embodiments of the present technical scheme are set forth in the following drawings. The following drawings are incorporated into the present text and constitute a part of the specific embodiments. In some cases, the well-known structures and components are shown in block diagram form in order to avoid obscuring the concepts of the present technical scheme subject matter.

[0024] Fig. 1 The present technical scheme is a schematic diagram when the valve stem is in the first limit position.

[0025] Fig. 2 The present technical scheme is a schematic diagram when the valve stem is in the second limit position.

[0026] Fig. 3 The present technical scheme is a schematic diagram of the first angle of the base.

[0027] Fig. 4 The present technical scheme is a schematic diagram of the second angle of the base.

[0028] Fig. 5 The present technical scheme is a schematic diagram of the slide.

[0029] In the drawings:

[0030] 1, valve stem.

[0031] 2, drive assembly, 21, drive arm, 211, let the slot, 22, base, 23, the first slide column, 231, the first strip slot, 24, slide, 241, screw hole, 242, tab, 25, the second slide column, 251, the second strip slot, 26, lead screw, 261, motor, 27, support seat, 271, rotating shaft, 272, correction slot, 28, guide column, 281, guide slot. DETAILED DESCRIPTION

[0032] The specific embodiments shown below are intended to serve as a description of the various configurations of the subject technology and are not intended to represent the only configurations in which the subject technology can be practiced. The specific embodiments include specific details for the purposes of providing a thorough understanding of the subject technology. However, it will be apparent to those skilled in the art that the subject technology can be practiced without

[0033] It can be understood that, in this document, the terms such as "first" and "second" are intended to distinguish one entity or operation from another entity or operation, and are not intended to imply or indicate any actual relationship or sequence between the entities or operations.

[0034] The terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the statement "comprising a" does not exclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0035] Reference Figs. 1 to 5 As shown in the figure, a drive device of a regulating valve, comprising a valve rod 1 moving along a straight line reciprocating and a drive assembly 2 driving the valve rod 1, the drive assembly 2 comprising a drive arm 21 driving the displacement of the valve rod 1;

[0036] The driving assembly 2 further comprises a base 22, the driving arm 21 is rotationally connected to the base 22, the valve rod 1 is slidingly connected to the driving arm 21 through a first slide post 23, the base 22 is further provided with a driving mechanism for driving the driving arm 21, the driving mechanism comprises a sliding seat 24 slidingly arranged on the base 22, the sliding direction of the sliding seat 24 is parallel to the sliding direction of the valve rod 1, the sliding seat 24 is slidingly connected to the driving arm 21 through a second slide post 25, the distance from the rotation center of the base 22 to the first slide post 23 is smaller than the distance from the rotation center of the base 22 to the second slide post 25.

[0037] The base 22 is provided with a lead screw 26 for driving the displacement of the sliding seat 24, and the sliding seat 24 is provided with a screw hole 241 matched with the lead screw 26.

[0038] The driving arm 21 forms a lever mechanism in cooperation with the first slide post 23 and the second slide post 25, and the required acting force for driving the displacement of the valve rod 1 is smaller, so that a smaller power prime mover can be arranged.

[0039] However, the valve rod 1 may be misoperated in the actual application process of the regulating valve, at this time, even if the medium adjusted by the regulating valve exerts an acting force on the valve rod 1, since the acting force is usually not large, when the valve rod 1 transmits the acting force to the driving arm 21, since the driving arm 21 forms a lever mechanism, the valve rod 1 needs a larger acting force to drive the sliding seat 24 to displace through the driving rod, therefore, the valve rod 1 is not easy to misoperate in the use process, and the stability of the regulating valve is improved.

[0040] In some embodiments, the cross-sectional shape of the first slide post 23 and the second slide post 25 is circular, or the first slide post 23, the second slide post 25 and the driving arm 21 are in line contact, so as to reduce the wear of the driving arm 21.

[0041] Referring to Figs. 1 to 5 In some embodiments, the base 22 is further provided with a support seat 27, the driving arm 21 is rotationally connected to the support seat 27 through a rotating shaft 271, and the support seat 27 and the base 22 are in an integrated structure.

[0042] The support seat 27 is provided with a correction groove 272 for correcting the position of the driving arm 21 relative to the support seat 27, a part of the driving arm 21 is located in the correction groove 272, and the opposite two side walls of the correction groove 272 are both provided with an axle hole matched with the rotating shaft 271.

[0043] The arrangement of the correction groove 272 can prevent the misoperation of the driving arm 21, that is, prevent the driving arm 21 from moving along the axial direction of the rotating shaft 271, so that the driving arm 21 has higher displacement accuracy.

[0044] In some embodiments, the rotating shaft 271 is provided with limiting blocks at both ends to prevent the rotating shaft 271 from being separated from the shaft hole, and the limiting blocks are welded to the rotating shaft 271.

[0045] In some embodiments, the base 22 is further provided with a motor 261 for driving the lead screw 26, the output shaft of the motor 261 is in an integral structure with the lead screw 26, and the output shaft of the motor 261 is coaxially arranged with the lead screw 26.

[0046] The motor 261 can be fixed to the base 22 by screws, and the motor 261 can also be fixed to the base 22 by other fasteners.

[0047] In some embodiments, the base 22 is further provided with a guide column 28, the guide column 28 is provided with a guide groove 281, a part of the sliding block 24 is located in the guide groove 281, and the guide column 28 is in an integral structure with the base 22.

[0048] The side of the sliding block 24 away from the guide column 28 is provided with a lug plate 242, the lug plate 242 is in an integral structure with the sliding block 24, and the screw hole 241 is arranged on the lug plate 242.

[0049] A rib plate is arranged between the lug plate 242 and the sliding block 24 to increase the connection strength of the lug plate 242 and the sliding block 24. The sliding block 24, the lug plate, and the rib plate are in an integral structure.

[0050] Referring to Figs. 1 to 5 In some embodiments, the driving arm 21 is provided with a first slot 231 matched with the first sliding column 23 and a second slot 251 matched with the second sliding column 25, respectively, and the first sliding column 23 is welded to the valve stem 1.

[0051] In some embodiments, the driving arm 21 is further provided with a clearance slot 211 for preventing the valve stem 1 from interfering with the driving arm 21, the clearance slot 211 is long strip-shaped, the clearance slot 211 is communicated with the first slot 231, and the clearance slot 211 is in a clearance fit with the circumscribed circle of the valve stem 1.

[0052] The clearance slot 211 can not only prevent the valve stem 1 from interfering with the driving arm 21, but also guide the valve stem 1, so that the valve stem 1 has higher displacement accuracy, and other structures of the valve matched with the valve stem 1 bear smaller force during movement of the valve stem 1, so that the valve is not easy to be damaged.

[0053] The above introduces the subject technical scheme of the utility model and corresponding details, and it can be understood that the above introduction is only some implementation of the subject technical scheme of the utility model, and some details can be omitted in the specific implementation.

[0054] In addition, in some embodiments of the above utility model, multiple embodiments can be combined for implementation, and various combination schemes are not listed one by one due to the length limit. Those skilled in the art can freely combine the above embodiments according to the needs in the specific implementation to obtain better application experience.

[0055] Those skilled in the art can obtain other detailed configurations or drawings according to the subject technical scheme of the utility model and the drawings when implementing the subject technical scheme of the utility model. Obviously, these details still belong to the range covered by the subject technical scheme of the utility model without departing from the subject technical scheme of the utility model.

Claims

1. A drive device for a regulating valve, characterized in that: The application relates to a valve rod (1) which performs linear reciprocating motion and a driving assembly (2) for driving the valve rod (1), wherein the driving assembly (2) comprises a driving arm (21) for driving the valve rod (1) to displace; the driving assembly (2) further comprises a base (22), the driving arm (21) is rotationally connected to the base (22), the valve rod (1) is slidably connected to the driving arm (21) through a first slide post (23), the base (22) is further provided with a driving mechanism for driving the driving arm (21), the driving mechanism comprises a sliding seat (24) which is slidably arranged on the base (22), the sliding direction of the sliding seat (24) is parallel to the sliding direction of the valve rod (1), the sliding seat (24) is slidably connected to the driving arm (21) through a second slide post (25), the distance from the rotation center of the base (22) to the first slide post (23) is smaller than the distance from the rotation center of the base (22) to the second slide post (25); the base (22) is provided with a lead screw (26) for driving the sliding seat (24) to displace, and the sliding seat (24) is provided with a screw hole (241) matched with the lead screw (26).

2. The drive device of a regulating valve according to claim 1, characterized in that: The base (22) is further provided with a supporting seat (27), the driving arm (21) is rotationally connected to the supporting seat (27) through a rotating shaft (271), and the supporting seat (27) and the base (22) are in an integrated structure.

3. The drive device of a regulating valve according to claim 2, characterized in that: The supporting seat (27) is provided with a correction groove (272) for correcting the position of the driving arm (21) relative to the supporting seat (27), a part of the driving arm (21) is located in the correction groove (272), and the opposite two side walls of the correction groove (272) are provided with shaft holes matched with the rotating shaft (271).

4. The drive device of a regulating valve according to claim 3, characterized in that: The two ends of the rotating shaft (271) are provided with limiting blocks for preventing the rotating shaft (271) from being separated from the shaft holes, and the limiting blocks are welded on the rotating shaft (271).

5. The drive device of a regulating valve according to claim 4, characterized in that: The base (22) is further provided with a motor (261) for driving the lead screw (26), the output shaft of the motor (261) and the lead screw (26) are in an integrated structure, and the output shaft of the motor (261) and the lead screw (26) are coaxially arranged.

6. The drive device of a regulating valve according to claim 1, characterized in that: The base (22) is further provided with a guide column (28), the guide column (28) is provided with a guide groove (281), a part of the sliding seat (24) is located in the guide groove (281), and the guide column (28) and the base (22) are in an integrated structure.

7. The drive device of a regulating valve according to claim 6, characterized in that: The side, away from the guide column (28), of the sliding seat (24) is provided with a convex plate (242), the convex plate (242) and the sliding seat (24) are in an integrated structure, and the screw hole (241) is arranged on the convex plate (242).

8. The drive device of a regulating valve according to claim 7, characterized in that: A rib plate is arranged between the convex plate (242) and the sliding seat (24) to increase the connecting strength of the convex plate (242) and the sliding seat (24).

9. The drive device of a regulating valve according to claim 1, characterized in that: The driving arm (21) is respectively provided with a first strip-shaped slot (231) matched with the first slide post (23) and a second strip-shaped slot (251) matched with the second slide post (25), and the first slide post (23) is welded to the valve rod (1).

10. The drive device of a regulating valve according to claim 9, characterized in that: The driving arm (21) is further provided with a clearance slot (211) for preventing the valve rod (1) from interfering with the driving arm (21), the clearance slot (211) is long strip-shaped, the clearance slot (211) is communicated with the first strip-shaped slot (231), and the clearance slot (211) is in clearance fit with the outer circle of the valve rod (1).

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