Power assisting device suitable for opening and closing equipment provided with valve rod

Abstract

The power assisting device comprises a lower clamping plate, a screw rod, a sliding sleeve and an adjusting nut, the lower clamping plate is clamped on the valve rod of the opening and closing equipment to be fixed, the sliding sleeve and the valve rod are axially arranged in parallel, and one end of the sliding sleeve is fixed. The utility model has the beneficial effects that the lower clamping plate is fixedly connected with the exposed part of the valve rod of the opening and closing equipment, so that the screw rod can be moved only by adjusting and rotating the adjusting nut through a proper wrench under the conditions that the opening and closing equipment cannot be actively opened and closed and the opening and closing are difficult or incomplete, and the opening and closing equipment is assisted; the opening and closing equipment does not need to be disassembled for trimming, the power assisting device is convenient to mount, and switching of the opening and closing switching function can be achieved only by changing the mounting direction of the opening and closing power assisting device; the lower clamping plate clamps and fixes the valve rod through the two semi-circular clamping plates, the application range is wide, kinetic energy is comprehensive, and the device can be used regardless of the diameter of the valve rod of a valve or the diameter of an executing rod of an executing mechanism.

Description

Technical Field

[0001] The utility model relates to the field of valve components, and particularly includes an assisting device applicable to opening and closing equipment configured with a valve stem. Background Art

[0002] When the fourth-stage high-low pressure bypass pressure reducing valve or other similar opening and closing devices are opened and closed through a hydraulic or electric mechanism, situations often occur where they cannot be closed tightly or cannot be opened due to certain reasons. Therefore, in the event of a failure of the actuator, there is an urgent need for a device that can assist in opening or closing after the actuator loses its function, enabling the actuator to continue operating without the need to completely isolate or disassemble the equipment. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide an assisting device applicable to opening and closing equipment configured with a valve stem.

[0004] This assisting device applicable to opening and closing equipment configured with a valve stem includes: a lower clamping plate, a screw rod, a sliding sleeve, and an adjusting nut. The lower clamping plate is fixed by clamping on the valve stem of the opening and closing equipment. The sliding sleeve is arranged axially parallel to the valve stem, and one end of the sliding sleeve is fixed;

[0005] One end of the screw rod is fixedly connected to the lower clamping plate, and the other end is a threaded section. The end of the threaded section is inserted into the sliding sleeve, and a part of the threaded section protrudes above the sliding sleeve. The adjusting nut is arranged on the threaded section protruding above the sliding sleeve for controlling the movement of the screw rod.

[0006] Preferably, the lower clamping plate includes semi-circular clamping plates. Two semi-circular clamping plates are symmetrically clamped on both sides of the valve stem. Each semi-circular clamping plate is respectively provided with ear plates on both sides, and the top of the screw rod is fixed between the ear plates of the two semi-circular clamping plates.

[0007] Preferably, the part of the screw rod inserted between the ear plates of the two semi-circular clamping plates is a fixed end. The contact surface between the fixed end and the ear plate is a plane. Bolt holes are respectively opened on the fixed end and the ear plate, and they are fixedly connected through fastening bolts.

[0008] Preferably, the sliding sleeve is in a cylindrical shape. The inner diameter of the sliding sleeve is greater than or equal to the diameter of the threaded section, and the outer diameter of the sliding sleeve is greater than or equal to the diameter of the adjusting nut, for providing a reaction force for the adjusting nut and the screw rod.

[0009] Preferably, two bolt holes are respectively opened on each ear plate and the fixed end, and the two bolt holes are arranged axially along the valve stem.

[0010] Preferably, when the two semi-circular clamping plates are closed, there is a certain gap between the ear plates, and the width of the gap is equal to the thickness of the fixed end.

[0011] The beneficial effects of the utility model are:

[0012] 1) The utility model fixes the exposed part of the valve stem connected to the opening and closing device through the lower clamping plate. When the opening and closing device cannot be opened and closed actively, or is difficult or incomplete to open and close, it is only necessary to adjust and rotate the adjusting nut with a suitable wrench to move the screw rod to assist the opening and closing device without disassembling the opening and closing device for repair. The power assisting device is easy to install, and the opening and closing switching functions can be switched by only changing the installation direction of the opening and closing power assisting device.

[0013] 2) The lower clamping plate of the utility model clamps the valve stem through two semicircular clamping plates, and the ear plates and screws on both sides of the lower clamping plate are fixedly connected by fastening bolts. It has a wide range of applications and comprehensive kinetic energy, and can be used regardless of the diameter of the valve stem of the valve or the actuator rod of the actuator.

[0014] 3) The threaded section of the screw of the utility model is inserted into the sliding sleeve, and the sliding sleeve is fixed on the force point to provide a reaction force to the adjusting nut so that the screw moves axially when the adjusting nut rotates. A smaller input force can be obtained through an amplified output force to achieve the function of auxiliary opening and closing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the assembly drawing of the power assist device;

[0016] Figure 2 is a top view of the lower splint;

[0017] Figure 3 is a front view of the lower splint;

[0018] Figure 4 is a schematic diagram of a screw;

[0019] Figure 5 It is the view of the screw axial direction;

[0020] Figure 6 is a schematic diagram of a sliding sleeve;

[0021] Figure 7 A cross-sectional view of the sleeve.

[0022] Explanation of the reference numerals: semicircular ring clamp 1, ear plate 11, bolt hole 12, screw rod 2, fixed end 21, threaded section 22, fixed end bolt hole 23, sliding sleeve 3, adjusting nut 4, fastening bolt 5. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the embodiments. The description of the following embodiments is only used to help understand the utility model. It should be pointed out that for ordinary people in this technical field, the utility model can also be modified in some ways without departing from the principle of the utility model, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

[0024] As an embodiment, as Figures 1 to 7 shown, the boosting device applicable to the opening and closing equipment configured with a valve stem includes: a lower clamping plate, a screw rod 2, a sliding sleeve 3, and an adjusting nut 4.

[0025] As Figures 1 to 3 shown, the lower clamping plate is clamped and fixed on the valve stem. The lower clamping plate includes a semi-circular clamping plate 1. Two semi-circular clamping plates 1 are symmetrically clamped on both sides of the valve stem. Each side of each semi-circular clamping plate 1 is respectively provided with an ear plate 11. The top end of the screw rod 2 is fixed between the ear plates 11 of the two semi-circular clamping plates 1.

[0026] Corresponding bolt holes 12 are formed in the ear plates 11 of the two semi-circular clamping plates 1. The part of the screw rod 2 inserted between the ear plates 11 of the two semi-circular clamping plates 1 is a fixed end 21. The contact surface between the fixed end 21 and the ear plate 11 is a plane. When the two semi-circular clamping plates 1 are closed, there is a certain gap between the ear plates 11, and the width of the gap is equal to the thickness of the fixed end 21, so that there is no movement between the screw rod 2 and the lower clamping plate; for a valve stem with a diameter larger or smaller than the diameter of the semi-circular clamping plate 1, it can also be adapted to the cross-sectional size of the valve stem through adjustment methods such as fillers to form a clamping effect. Therefore, it can be used regardless of the diameter of the valve stem of the valve or the actuator rod of the actuator. The semi-circular clamping plate 1 of the lower clamping plate can also be replaced with other structures to correspond to valve stems with different cross-sectional shapes.

[0027] Bolt holes are respectively formed in the fixed end 21 and the ear plate 11, and they are fixedly connected through a fastening bolt 5. The fastening bolt 5 passes through the bolt hole 12 and is fixed through the bolt hole 23 of the fixed end.

[0028] Two bolt holes are formed in each ear plate 11 and the fixed end 21, and the two bolt holes are arranged along the length direction of the valve stem, so that there is no relative rotation between the screw rod 2 and the lower clamping plate, and the generated thrust is always parallel to the length direction of the screw rod 2.

[0029] As Figure 6 and Figure 7 shown, the sliding sleeve 3 is in a cylindrical shape and is arranged axially parallel to the axial direction of the valve stem. One end of the sliding sleeve 3 is fixed; as Figure 4 and Figure 5 shown, one end of the screw rod 2 is fixedly connected to the lower clamping plate, and the other end is a threaded section 22. The end of the threaded section 22 is inserted into the sliding sleeve 3.

[0030] As Figure 1 shown, a part of the threaded section 22 protrudes from above the sliding sleeve 3. The adjusting nut 4 is arranged on the threaded section 22 protruding above the sliding sleeve 3 and is used to control the movement of the screw rod 2. The inner diameter of the sliding sleeve 3 is greater than or equal to the diameter of the threaded section 22, and the outer diameter of the sliding sleeve 3 is greater than or equal to the diameter of the adjusting nut 4, which is used to provide a reaction force for the adjusting nut 4 and the screw rod 2.

[0031] When assembling this boosting device: fasten the lower clamping plate onto the valve stem of the actuator, screw the adjusting nut 4 onto the screw rod 2, slip on the sliding sleeve 3, and fix the screw rod 2 at the middle position of the lower clamping plate with four fastening bolts 5. As Figure 1 shown, when rotating the adjusting nut 4 with a wrench, due to the reaction force provided by the sliding sleeve 3, the adjusting nut 4 cannot descend, causing the screw rod 2 to be lifted, helping the valve stem to move upward as a whole, achieving the tightening of the valve and realizing the closing function. When the boosting device is needed for the boosting of valve opening, just reverse the installation direction of the boosting device.

[0032] The said valve stem can be the valve stem of a valve, or the actuator rod of an actuator, or other devices with axial movement. In this embodiment, the valve stem is the valve stem of the opening and closing device, but any device that can be clamped by the lower clamping plate and moves vertically up and down can be used.

Claims

1. A booster device suitable for an opening and closing device equipped with a valve stem, characterized in that: include: The lower clamping plate, the screw rod, the sliding sleeve and the adjusting nut, the lower clamping plate is clamped on the valve stem of the opening and closing device and fixed, the sliding sleeve and the valve stem are axially parallel, and one end of the sliding sleeve is fixed; One end of the screw is fixedly connected to the lower clamping plate, and the other end is a threaded section. The end of the threaded section is inserted into the sliding sleeve, and part of the threaded section is exposed from above the sliding sleeve. The adjusting nut is arranged on the threaded section exposed above the sliding sleeve to control the movement of the screw.

2. The power assist device for an opening and closing device equipped with a valve stem according to claim 1, characterized in that: The lower clamping plate comprises a semicircular clamping plate, and two semicircular clamping plates are symmetrically clamped on both sides of the valve stem. Ear plates are respectively arranged on both sides of each semicircular clamping plate, and the top end of the screw is fixed between the ear plates of the two semicircular clamping plates.

3. The power assist device for an opening and closing device equipped with a valve stem according to claim 2, characterized in that: The part of the screw rod inserted between the ear plates of the two semicircular ring clamps is the fixed end, the contact surface between the fixed end and the ear plate is a plane, the fixed end and the ear plate are respectively provided with bolt holes, and are fixedly connected by tightening bolts.

4. The booster device for an opening and closing device equipped with a valve stem according to claim 1, characterized in that: The sliding sleeve is cylindrical, the inner diameter of the sliding sleeve is greater than or equal to the diameter of the threaded section, and the outer diameter of the sliding sleeve is greater than or equal to the diameter of the adjusting nut, and is used to provide reaction force for the adjusting nut and the screw.

5. The power assist device for an opening and closing device equipped with a valve stem according to claim 3, characterized in that: Two bolt holes are provided on each ear plate and the fixed end, and the two bolt holes are arranged along the axial direction of the valve stem.

6. The power assist device for an opening and closing device equipped with a valve stem according to claim 3, characterized in that: When the two semicircular ring splints are closed, there is a certain gap between the ear plates, and the width of the gap is equal to the thickness of the fixed end.

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