Mechanical switch indication observation rod of electric valve

Abstract

The utility model belongs to the technical field of electric valve switches, and particularly discloses an electric valve mechanical switch indication observation rod which comprises a valve body, a lead screw detachably connected to the valve body, a hand wheel rotatably connected to the upper portion of the valve body, a lead screw in threaded connection with the hand wheel, an indication rod fixedly connected to the lead screw, and a scale structure arranged on the upper portion of the indication rod. The hand wheel is detachably connected with a sealing structure, meanwhile, the sealing structure is connected with the indicating rod in a sleeved mode, the portion, close to the hand wheel, of the valve body is detachably connected with an electric actuator, the lower portion of the lead screw is movably connected with the flashboard, and the end of the electric actuator is detachably connected with an electric display device. An actuator structure is detachably connected to the electric actuator and located below the electric display device. When the device is actually used, a worker can conveniently and visually know the working state of the valve, and the situation that when an electric display structure is damaged, the worker cannot conveniently know the using condition of the valve is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric valve switches, and in particular relates to an electric valve mechanical switch indicating observation rod. Background Art

[0002] During the loading operation at the liquefied chemical terminal of Shouguang Port, abnormal pipeline pressure was found. No abnormality was found through repeated inspections on the DCS operating system screen. The electric actuator status was always in the open state after multiple on-site inspections. For safety reasons, the on-site operation had to be stopped to restore the process. After the process was restored, the on-site pressure returned to normal. No abnormality was found in the electric actuators of the entire process. Considering that the electric actuator failure may cause the valve to not open, when the electric actuator was inspected on-site, it was found that the gate valve lead screw was separated from the gate plate, causing the electric actuator to operate the valve normally but not move, resulting in a blockage in the process, which caused a sudden increase in pressure. Through the occurrence of this accident, we found that the core problem of the electric valve lies in the display status of the valve. Simply relying on the panel display of the electric actuator is unreliable and easily leads to safety accidents. Utility Model Content

[0003] The utility model aims to solve the shortcomings in the prior art and proposes a mechanical switch indicating observation rod for an electric valve.

[0004] In order to achieve the above purpose, the utility model provides an electric valve mechanical switch indicating observation rod, including a valve body, a lead screw detachably connected to the valve body, a hand wheel rotatably connected to the upper part of the valve body, the lead screw and the hand wheel are threadedly connected, an indicating rod is fixedly connected to the lead screw, a scale structure is provided on the upper part of the indicating rod, a sealing structure is detachably connected to the hand wheel, and the sealing structure is sleeved with the indicating rod.

[0005] In the above technical solution, further, a portion of the valve body close to the hand wheel is detachably connected to an electric actuator, and the lower portion of the lead screw is movably connected to the gate plate.

[0006] In the above technical solution, further, an electric display device is detachably connected to an end portion of the electric actuator, and an actuator structure is detachably connected to a portion of the electric actuator located below the electric display device.

[0007] In the above technical solution, further, the sealing structure includes a lower sealing ring threadedly connected to the lead screw, and the lower sealing ring is sleeved on the portion where the lead screw and the valve body penetrate.

[0008] In the above technical solution, further, the upper part of the handwheel is connected to a connecting seat by bolts, and the top surface of the connecting seat is fixedly connected to a sealing shell, the number of the sealing shells is two, the two sealing shells are relatively distributed, and the two sealing shells are fixedly connected by a connecting screw.

[0009] In the above technical solution, further, an upper sealing ring is embedded in the interior of the sealing shell, and the upper sealing ring is a tubular structure, and the upper sealing ring is not threadedly connected to the lead screw.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] When the device is actually used, the staff can intuitively understand the working status of the valve, and avoid the situation where the staff cannot understand the use of the valve when the electric display structure is damaged;

[0012] When the device is actually used, it can prevent the display rod from being contaminated with a lot of dirt, making it easier for workers to read the scale on the display rod;

[0013] When the device is actually used, leakage of the valve can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the implementation state of the utility model;

[0015] Figure 2 It is a schematic diagram of the connection structure between the utility model and the valve body;

[0016] Figure 3 This is a connection structure diagram of the sealing structure and the indicator rod in the utility model.

[0017] In the figure: 1. electric actuator; 2. valve body; 3. scale structure; 4. indicator rod; 5. lower sealing ring; 6. lead screw; 7. gate; 8. electric display device; 9. actuator structure; 10. sealing shell; 11. connecting screw; 12. connecting seat; 13. upper sealing ring; 14. hand wheel. DETAILED DESCRIPTION

[0018] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0019] like Figure 1-Figure 3 The electric valve mechanical switch indicating observation rod shown includes a valve body 2, a lead screw 6 is detachably connected to the valve body 2, a hand wheel 14 is rotatably connected to the upper part of the valve body 2, the lead screw 6 is threadedly connected to the hand wheel 14, an indicating rod 4 is fixedly connected to the lead screw 6, a scale structure 3 is arranged on the upper part of the indicating rod 4, a sealing structure is detachably connected to the hand wheel 14, and the sealing structure is sleeved on the indicating rod 4, a scale structure 3 is arranged on the indicating rod 4, and the staff can understand whether the valve body 2 is open through the scale structure 3.

[0020] The electric actuator 1 is detachably connected to the part of the valve body 2 near the handwheel 14, and the lower part of the screw 6 is movably connected to the gate 7. When the electric actuator 1 is working, the handwheel 14 can drive the screw 6 to move up and down, thereby realizing the operation of the screw 6 controlling the gate 7.

[0021] An electric display device 8 is detachably connected to the end of the electric actuator 1, and an actuator structure 9 is detachably connected to the bottom of the electric display device 8 on the electric actuator 1. The actuator structure 9 is a structure for controlling the rotation of the handwheel 14 in the prior art, and the electric display device 8 is a display device for displaying the working status of the actuator structure 9 in the prior art.

[0022] The sealing structure includes a lower sealing ring 5 threadedly connected to the lead screw 6. The lower sealing ring 5 is sleeved on the part where the lead screw 6 and the valve body 2 penetrate. When the lower sealing ring 5 is in use, it can prevent the liquid in the valve body 2 from leaking.

[0023] The upper part of the handwheel 14 is connected to a connecting seat 12 by bolts, and a sealing shell 10 is fixedly connected to the top surface of the connecting seat 12. There are two sealing shells 10, which are relatively distributed and fixedly connected by a connecting screw 11. An upper sealing ring 13 is embedded in the interior of the sealing shell 10. The upper sealing ring 13 is a tubular structure. The upper sealing ring 13 is not threadedly connected to the lead screw 6. When the upper sealing ring 13 is used in conjunction with the lower sealing ring 5, liquid leakage inside the valve body 2 can be avoided, thereby sealing the portion where the lead screw 6 and the valve body 2 are connected.

[0024] Working principle: During actual use, the staff will pre-connect the valve body 2 with the external pipeline, and then the electric actuator 1 will drive the hand wheel 14 to rotate, which can realize the up and down movement of the lead screw 6, so that the lead screw 6 can control the gate plate 7 to open and close the valve body 2. Two scale lines are arranged on the scale structure 3, among which the scale line located at the upper part is the closing scale line, and the scale line located at the lower part is the opening scale line. When the valve body 2 is opened, the opening scale line leaks out, and when the valve body 2 is closed, the opening scale line does not leak out. When the lead screw 6 moves up and down, the upper sealing ring 13 can wipe the scale line, so that the staff can clearly see the position of the scale line.

[0025] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A mechanical switch indicating observation rod of an electric valve, comprising a valve body (2), characterized in that: The valve body (2) is detachably connected to a lead screw (6), the upper part of the valve body (2) is rotatably connected to a hand wheel (14), the lead screw (6) and the hand wheel (14) are threadedly connected, the lead screw (6) is fixedly connected to an indicator rod (4), a scale structure (3) is provided on the upper part of the indicator rod (4), and a sealing structure is detachably connected to the hand wheel (14), and the sealing structure is sleeved with the indicator rod (4).

2. The electric valve mechanical switch indicating observation rod according to claim 1, characterized in that: The portion of the valve body (2) close to the hand wheel (14) is detachably connected to an electric actuator (1), and the lower portion of the lead screw (6) is movably connected to the gate plate (7).

3. The electric valve mechanical switch indicating observation rod according to claim 2, characterized in that: An electric display device (8) is detachably connected to the end of the electric actuator (1), and an actuator structure (9) is detachably connected to the electric actuator (1) below the electric display device (8).

4. The electric valve mechanical switch indicating observation rod according to claim 1, characterized in that: The sealing structure comprises a lower sealing ring (5) threadedly connected to the lead screw (6), and the lower sealing ring (5) is sleeved on a portion where the lead screw (6) and the valve body (2) penetrate.

5. The electric valve mechanical switch indicating observation rod according to claim 1, characterized in that: The upper portion of the hand wheel (14) is connected to a connection seat (12) via bolts, and the top surface of the connection seat (12) is fixedly connected to a sealing shell (10), the number of the sealing shells (10) is two, the two sealing shells (10) are relatively distributed, and the two sealing shells (10) are fixedly connected via a connecting screw (11).

6. The electric valve mechanical switch indicating observation rod according to claim 5, characterized in that: An upper sealing ring (13) is embedded in the interior of the sealing shell (10); the upper sealing ring (13) is a tubular structure; the upper sealing ring (13) is not threadedly connected to the lead screw (6).

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