Check valve operation state calibrator

Abstract

The utility model relates to the technical field of control valves for fluid pipelines, in particular to a check valve running state calibrator which comprises a shaft seat and a rotating shaft, two ends of the rotating shaft respectively penetrate through the shaft seat and are rotatably connected with the shaft seat, one end of the rotating shaft is fixedly connected with a cam, and the other end of the rotating shaft is fixedly connected with an operating mechanism. The operating mechanism can drive the rotating shaft to rotate relative to the shaft seat. The check valve checking device is simple in structure, can be directly installed on the valve body of the check valve, can check whether the check valve can operate normally or not, is simple to operate, can be observed visually, and is high in practicability.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of control valve for fluid pipeline, in particular to a check valve operating state checker. BACKGROUND

[0002] Various types of check valves are installed on oil wells, production equipment and pipelines in the petroleum, chemical and refining industries. Check valves are used in different environments and scenarios, and often cannot be closed or cannot be opened due to rust. Regular inspection of the operating state of the check valve can provide strong protection for production safety.

[0003] However, since the check valve is connected to the pipeline, it cannot be determined from the appearance whether it can be normally opened, and stopping production for disassembly and verification requires shutdown, which is not realistic for actual production. UTILITY MODEL CONTENTS

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a check valve operating state checker.

[0005] In order to solve the above technical problem, the utility model provides the following technical scheme:

[0006] A check valve operating state checker, comprising a shaft seat and a rotating shaft, the rotating shaft penetrates the shaft seat at both ends and is rotatably connected thereto, one end of the rotating shaft is fixedly connected with a cam, and the other end is fixedly connected with an operating mechanism, and the operating mechanism can drive the rotating shaft to rotate relative to the shaft seat.

[0007] In use, the above structure is installed on the valve body of the check valve, the rotating shaft is arranged perpendicularly to the orientation of the valve rod, and the cam is used to contact the top end of the valve rod of the check valve. Specifically, the valve rod is connected to a valve core, when the valve core is not opened, the long axis of the cam is perpendicular to the valve rod, and the valve rod is not actuated, at this time the check valve is in a closed state. When it is necessary to verify whether the check valve is normally opened or closed, the operating mechanism rotates the rotating shaft, so that the long axis of the cam is rotated to be parallel to the valve rod, the radial length of the cam is increased, thereby pressing the valve rod to move downward and opening the check valve. When the operating mechanism is not actuated, the valve rod is reset under the action of its own spring, rises and pushes the cam, at this time the cam rotates and drives the rotating shaft to reset, at this time it is indicated that the check valve can operate normally.

[0008] A torsional spring is fixedly sleeved on the rotating shaft, and the end of the torsional spring is fixedly arranged relative to the shaft seat. The function of the torsional spring is to generate a certain torsional force on the rotating shaft, so that the cam is always downward and close to the top end of the valve rod. When the fluid enters to open the check valve, the cam rotates under the action of the torsional spring and is always close to the descending valve rod.

[0009] In order to ensure the safety of the device, avoid mis-touch, the shaft seat is fixedly connected with a shell, and the operating mechanism is arranged in the shell.

[0010] One end of the shell is open, and a sealing cover is connected.

[0011] The shell adopts an explosion-proof box, and a sealing gasket is arranged between the sealing cover and the shell.

[0012] A transparent window is arranged on the sealing cover, so that the state of the operating mechanism can be observed, and thus the state of the check valve can be judged.

[0013] Specifically, the operating mechanism selects a handle, and other automatic mechanisms can also be selected.

[0014] A sealing ring is arranged between the rotating shaft and the shaft seat, so as to ensure the sealing property of the check valve.

[0015] A nut is threadedly connected to the outer surface of the rotating shaft, and the nut is arranged at the joint of the rotating shaft and the shaft seat, so that the distance of the rotating shaft and the cam extending out of the shaft seat can be limited, and thus different check valve structures can be adapted.

[0016] The beneficial effects achieved by the utility model are as follows:

[0017] The utility model has the advantages of simple structure, direct installation on the valve body of the check valve, verification of whether the check valve can normally operate, simple operation, intuitive observation, and high practicability. DRAWINGS

[0018] The drawings are used to provide further understanding of the utility model, constitute a part of the specification, are used together with the embodiments of the utility model to explain the utility model, and do not constitute a limitation on the utility model. In the drawings:

[0019] Figure 1 is a structural schematic view (state one) of the utility model;

[0020] Figure 2 is a structural schematic view (state two) of the utility model;

[0021] Figure 3 is a structural schematic view (check valve unopened state) of the utility model applied to a double-effect check valve;

[0022] Figure 4 is a structural schematic view (check valve opened state in the verification process) of the utility model applied to a double-effect check valve;

[0023] Figure 5 is a structural schematic view of the cam of the utility model.

[0024] In the figure: 1, cam; 2, shaft seat; 3, rotating shaft; 4, sealing ring; 5, nut; 6, torsion spring; 7, operating mechanism; 8, sealing cover; 9, sealing gasket; 10, transparent window; 11, shell; 12, valve body; 13, valve stem; 14, valve core. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present application are described below with reference to the accompanying drawings, and it should be understood that the preferred embodiments described herein are intended to illustrate and explain the present application, and are not intended to limit the present application.

[0026] Embodiment: as shown in Figure 1 , Figure 2 , Figure 5 A single valve operating state verifier, comprising a shaft seat 2 and a rotating shaft 3, the rotating shaft 3 penetrates the shaft seat 2 at both ends, and the shaft seat 2 and the rotating shaft 3 are rotatably connected. One end of the rotating shaft 3 is fixedly connected with a cam 1, and the other end is fixedly connected with an operating mechanism 7, which can drive the rotating shaft 3 to rotate relative to the shaft seat 2. The shape of the cam 1 is as shown in Figure 5 , which is a conventional structure.

[0027] A torsion spring 6 is fixedly sleeved on the rotating shaft 3, and the end of the torsion spring 6 is fixedly arranged relative to the shaft seat 2. The function of the torsion spring 6 is to make the rotating shaft 3 generate a certain torsion, so that the cam 1 always moves downward and approaches the top end of the valve stem 13. When the fluid enters to open the single valve, the cam 1 rotates under the action of the torsion spring 6 and always approaches the descending valve stem 13.

[0028] In order to ensure the safety of the device and avoid accidental touch, the shaft seat 2 is fixedly connected with a shell 11, and the operating mechanism 7 is arranged inside the shell 11. As shown in Figure 1 , a fixed column is fixedly connected inside the shell 11, which is used to be fixedly connected with the end of the torsion spring 6.

[0029] One end of the shell 11 is open, and a sealing cover 8 is connected. The shell 11 adopts an explosion-proof box, and a sealing gasket 9 is arranged between the sealing cover 8 and the shell 11.

[0030] The sealing cover 8 is provided with a transparent window 10, which is convenient for observing the state of the operating mechanism 7, so as to judge the state of the single valve.

[0031] Specifically, the operating mechanism 7 selects a handle, and other automatic mechanisms can also be selected.

[0032] A sealing ring 4 is arranged between the rotating shaft 3 and the shaft seat 2 to ensure the sealing property of the single valve.

[0033] The outer surface of the rotating shaft 3 is threaded with a nut 5. The nut 5 is located at the junction of the rotating shaft 3 and the shaft seat 2. The nut 5 can limit the distance that the rotating shaft 3 and the cam 1 extend relative to the shaft seat 2, thereby adapting to different single-flow valve structures.

[0034] like Figure 3 , Figure 4 As shown, in use, this utility model is installed on the valve body 12 of the one-way valve. Specifically, the bearing seat 2 is fixedly connected inside the valve body 12, the housing 11 is fixedly connected outside the valve body 12, the rotating shaft 3 rotates through the side wall of the valve body 12, and the rotating shaft 3 is set perpendicular to the valve stem 13. The cam 1 is used to contact the top of the valve stem 13 of the one-way valve. Specifically, the valve stem 13 is connected to the valve core 14, and the valve core 14 controls the opening and closing of the valve port. When the valve core 14 is not open, the long axis of the cam 1 is perpendicular to the valve stem 13, the valve stem 13 does not move, and the one-way valve is in the closed state. When it is necessary to check whether the check valve is opening or closing normally, open the sealing cover 8 and manually drive the operating mechanism 7 to rotate the shaft 3. This rotates the long axis of the cam 1 until it is parallel to the valve stem 13. The cam 1 presses the valve stem 13 downward, and the valve core 14 follows the movement of the valve stem 13, thus moving away from the valve port and opening the check valve. When the operating mechanism 7 is no longer driven, the valve stem 13 returns to its original position under the action of its own spring, rising to push the cam 1. If the cam 1 rotates at this time and drives the shaft 3 to reset, it indicates that the check valve is operating normally. By observing the return state of the operating mechanism 7, it can be determined whether the check valve is closed tightly.

Claims

1. A single flow valve operating condition verifier, characterized by, The utility model provides a cam mechanism, including axle seat (2) and pivot (3), pivot (3) two ends respectively go through axle seat (2), and two rotatory connections, and one end of pivot (3) is fixedly connected with cam (1), the other end is fixedly connected with operating mechanism (7), and operating mechanism (7) can drive pivot (3) relative to axle seat (2) rotation.

2. The single flow valve operating condition verifier of claim 1, wherein, The pivot (3) is fixedly sleeved with a torsion spring (6), and the end of the torsion spring (6) is fixedly arranged relative to the axle seat (2).

3. The single flow valve operating condition verifier of claim 1, wherein, The axle seat (2) is fixedly connected with a shell (11), and the operating mechanism (7) is arranged inside the shell (11).

4. The single flow valve operating condition verifier of claim 3, wherein, One end of the shell (11) is open, and a sealing cover (8) is connected.

5. The single flow valve operating condition verifier of claim 4, wherein, The shell (11) is an explosion-proof box, and a sealing gasket (9) is arranged between the sealing cover (8) and the shell (11).

6. The single flow valve operating condition checker according to claim 4 or 5, characterized in that The sealing cover (8) is provided with a transparent window (10).

7. The single vane valve operating condition checker according to claim 1 or 2, characterized by The operating mechanism (7) is a handle.

8. The single vane valve operating condition checker according to claim 1 or 2, characterized by A sealing ring (4) is arranged between the pivot (3) and the axle seat (2).

9. The single vane valve operating condition checker according to claim 1 or 2, characterized by The outer surface of the pivot (3) is threadedly connected with a nut (5), and the nut (5) is arranged at the joint of the pivot (3) and the axle seat (2).

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