Pneumatic valve switch detection device

Abstract

The utility model discloses a pneumatic valve switch detection device which comprises a valve head and a valve seat. A valve rod is arranged between the valve head and the valve seat; the device further comprises a connecting fixing piece, an opening indicating ruler and an opening indicating plate. The connecting fixing piece is detachably and fixedly connected to the valve rod and moves up and down along with the valve rod. The opening indicating ruler is of an L-shaped structure, the lower end of the opening indicating ruler is connected with the connecting fixing piece, and the upper end of the opening indicating ruler is bent and then extends upwards till exceeding the valve head. An opening marking arrow is arranged on the opening indicating ruler; the opening indicator board is arranged on the valve head; and a switch marking line corresponding to the opening marking arrow is arranged on the opening indicating plate. The device can assist in visually displaying the on-off mechanical state of the pneumatic valve, so that a worker can clearly judge the current on-off state of the pneumatic valve even if a certain distance exists between the worker and the pneumatic valve, the pneumatic valve with poor action can be found out, and a leakage fault point can be judged.

Description

Technical Field

[0001] This utility model belongs to the technical field of valve assembly equipment, and specifically relates to a pneumatic valve on / off detection device. Background Technology

[0002] A pneumatic valve is a valve assembly that controls the opening and closing of the valve using compressed air. Its cylinder piston actuator uses compressed air as a power source; the piston's movement drives a crank arm to rotate 90 degrees, achieving automatic valve opening and closing and adjusting the opening degree. Some pneumatic proportional valves can also control the valve's opening ratio. Pneumatic valves are widely used in industrial pipelines, including in LNG-fueled ships where fuel is transported via pipelines. If a leak occurs in the pipeline or valves during LNG gas transportation and is detected by the ship's combustible gas detector, the system will issue an alarm. If the leak continues, the fuel supply system will cut off the pipeline, stopping further fuel flow. When an LNG gas leak alarm occurs, personnel must promptly inspect the pipeline, locate the leak point, and repair it. At this time, personnel can observe the pipeline system display interface and the valve's on / off status to locate the fault. However, the compressed air entering the valves may contain impurities and moisture, easily causing pneumatic valve control failure. In such cases, it is difficult to determine the valve damage solely from the pipeline system display interface; personnel must manually inspect the pipeline and valves at the suspected fault location. Due to the dense arrangement of fuel pipelines and equipment inside the ship's hold, and the small installation locations of some valves, which are often obstructed by pipelines, staff cannot access these pneumatic valves. Furthermore, the small switch markings on the pneumatic valves, coupled with steam obstruction, make it difficult for staff to visually and accurately determine the true mechanical status of the valves from a distance, hindering the identification of faults. Utility Model Content

[0003] The purpose of this invention is to address the problems in existing technologies, such as the dense piping in gas-powered ships, which makes it difficult for personnel to closely observe and determine the true mechanical state of pneumatic valves, hindering the identification of fault points. This invention proposes a pneumatic valve on / off detection device. This device can visually display the on / off mechanical state of pneumatic valves, allowing personnel to clearly determine the current on / off status of the valves even from a distance. This facilitates the identification of malfunctioning pneumatic valves and the pinpointing of leaks.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A pneumatic valve on / off detection device includes a valve head and a valve seat; a valve stem is provided between the valve head and the valve seat; characterized in that it further includes a connecting fixing plate, an opening indicator ruler, and an opening indicator plate; the connecting fixing plate is detachably fixedly connected to the valve stem and moves up and down with the valve stem; the opening indicator ruler has an "L" shaped structure, the lower end of the opening indicator ruler is connected to the connecting fixing plate, and the upper end of the opening indicator ruler is bent and extends upward until it exceeds the valve head; an opening mark arrow is provided on the opening indicator ruler; the opening indicator plate is provided on the valve head; the opening indicator plate is provided with a switch mark line corresponding to the opening mark arrow.

[0006] The valve head, valve seat, and valve stem are all components of common pneumatic valves. The connecting fixing plate is detachably installed on the valve stem of a common pneumatic valve. As the pneumatic valve opens and closes, the connecting fixing plate moves up and down with the valve stem. The bent portion at the lower end of the opening indicator scale connects to the connecting fixing plate and extends outward from inside the pneumatic valve, finally bending upward until it exceeds the valve head. When the valve stem moves, the opening indicator scale also moves up and down. When the opening mark arrow points to the corresponding switch mark line, it indicates the open / closed state of the pneumatic valve. The opening indicator scale and opening indicator plate are relatively large, making it easy for maintenance personnel to observe. The opening indicator plate can be installed on the valve head by means of gluing, welding, screw connection, etc., as long as it is firmly fixed.

[0007] As a further technical improvement, the upper and lower parts of the connecting fixing piece are detachably equipped with fixing pieces. The two sets of fixing pieces together clamp the connecting fixing piece, providing auxiliary fixation.

[0008] As a further technical improvement, the connecting fixing piece includes connecting piece I and connecting piece II; the side of connecting piece I is provided with a slot; the side of connecting piece II is provided with a locking pin that matches the slot; both the slot and the locking pin are provided with corresponding screw holes; both connecting piece I and connecting piece II are provided with arc grooves that match the valve stem. Connecting piece I and connecting piece II are arranged on both sides of the valve stem, and then the locking pin of connecting piece II is inserted into the slot of connecting piece I, and then a screw is inserted through the screw hole to connect connecting piece I and connecting piece II. At this time, the arc grooves on connecting piece I and connecting piece II combine to form a through hole that matches the valve stem, and the valve stem passes through the through hole formed by the two sets of arc grooves.

[0009] As a further technical improvement, the connecting fixing plate is provided with a through groove that matches the valve stem. The connecting fixing plate is sleeved onto the valve stem through the through groove.

[0010] As a further technical improvement, the opening indicator is provided with scale lines. These scale lines are used to help indicate the current opening degree of the pneumatic valve.

[0011] As a further technical improvement, a support column is also included; the support column is disposed between the valve head and the valve seat. The support column serves to connect and support the valve head and the valve seat.

[0012] As a further technical improvement, the switch marking lines include an open marking line and a closed marking line; both the open and closed marking lines are marked with text. When the opening arrow is aligned with the open marking line, it indicates that the pneumatic valve is currently open; when the opening arrow is aligned with the closed marking line, it indicates that the pneumatic valve is currently closed; when the opening arrow is between the open and closed marking lines, it indicates that the pneumatic valve is partially open; the switch marking lines and opening arrows are all in a conspicuous color, such as red or yellow.

[0013] The above-described method for using a pneumatic valve switch detection device:

[0014] When in use, install the connecting fixing plate on the valve stem, and install two sets of fixing plates on the upper and lower sides of the connecting fixing plate respectively, and tighten the connecting fixing plate; install the opening indicator plate on the valve head; when the pneumatic valve is activated, the valve stem moves up and down, which drives the opening indicator plate to move up and down through the connecting fixing plate; when the opening mark arrow on the opening indicator plate is aligned with the open mark line, it indicates that the pneumatic valve is currently in the open state; when the opening mark arrow is aligned with the closed mark line, it indicates that the pneumatic valve is currently in the closed state; when the opening mark arrow is between the open mark line and the closed mark line, it indicates that the pneumatic valve is in the half-open state; because the opening indicator plate, opening indicator plate and opening mark arrow have a relatively large area, the operator can clearly see the current mechanical status of the pneumatic valve even from a slightly farther distance.

[0015] The technical solution of this utility model has the following beneficial effects:

[0016] 1. This utility model device sets a connecting and fixing piece and an opening indicator on the valve stem of a pneumatic valve, which move with the valve stem. An opening indicator plate is set on the valve head. When the pneumatic valve is opened or closed, the arrow of the opening mark on the opening indicator plate points to the corresponding part of the opening indicator plate, thereby judging the mechanical opening and closing state of the pneumatic valve. The display is intuitive and clear, allowing the operator to quickly and accurately know the current opening and closing state of the pneumatic valve even from a distance. It is helpful to judge whether the pneumatic valve is malfunctioning. Moreover, it is a purely mechanical structure indicator, which is not affected by electronic failures and has high reliability.

[0017] 2. The connecting and fixing plates of this utility model are both detachable, and are easy to assemble and disassemble, convenient to operate, easy to install on existing pneumatic valves, and conducive to promotion.

[0018] 3. The opening indicator of this utility model has a scale, which helps the staff to judge the opening ratio of the pneumatic valve. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the device.

[0020] Figure 2 This is a schematic diagram of the structure of the fixing plate of this device.

[0021] Figure 3 This is a structural diagram of the connection and fixing plate and the opening indicator ruler of this device.

[0022] Reference numerals in the attached diagram: 1-valve head, 2-valve seat, 3-valve stem, 4-connecting fixing plate, 5-opening indicator, 6-opening indicator plate, 7-fixing plate, 8-through groove, 9-scale line, 10-opening mark arrow, 11-switch mark line, 12-support column;

[0023] 701-Connecting piece I, 702-Connecting piece II, 703-Slot, 704-Slot pin, 705-Screw hole, 706-Arc groove. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Example 1:

[0026] like Figures 1-3 As shown, a pneumatic valve switch detection device includes a valve head 1 and a valve seat 2; a valve stem 3 is provided between the valve head 1 and the valve seat 2; it also includes a connecting fixing piece 4, an opening indicator 5, and an opening indicator plate 6; the connecting fixing piece 4 is detachably fixedly connected to the valve stem 3 and moves up and down with the valve stem 3; the opening indicator 5 has an "L" shaped structure, the lower end of the opening indicator 5 is connected to the connecting fixing piece 4, and the upper end of the opening indicator 5 is bent and extends upward until it exceeds the valve head 1; an opening mark arrow 10 is provided on the opening indicator 5; the opening indicator plate 6 is provided on the valve head 1; the opening indicator plate 6 is provided with a switch mark line 11 corresponding to the opening mark arrow 10.

[0027] The upper and lower parts of the connecting fixing piece 4 are detachably equipped with fixing pieces 7.

[0028] The connecting fixing piece 4 includes a connecting piece I 701 and a connecting piece II 702; the side of the connecting piece I 701 is provided with a slot 703; the side of the connecting piece II 702 is provided with a locking pin 704 that matches the slot 703; the slot 703 and the locking pin 704 are each provided with a corresponding screw hole 705; the connecting piece I 701 and the connecting piece II 702 are each provided with an arc groove 706 that matches the valve stem 3.

[0029] The connecting fixing piece 4 is provided with a through groove 8 that matches the valve stem 3.

[0030] The switch marking line 11 includes an on marking line and an off marking line; text labels are written next to both the on marking line and the off marking line.

[0031] The method of using this utility model is as follows:

[0032] In use, the connecting fixing plate 4 is installed on the valve stem 3, and two sets of fixing plates 7 are installed on the upper and lower sides of the connecting fixing plate 4 respectively and the connecting fixing plate 4 is tightened; the opening indicator plate 6 is installed on the valve head 1; when the pneumatic valve is activated, the valve stem 3 moves up and down, which drives the opening indicator 5 to move up and down through the connecting fixing plate 4; when the opening mark arrow 10 on the opening indicator 5 is aligned with the open mark line, it indicates that the pneumatic valve is currently in the open state; when the opening mark arrow 10 is aligned with the close mark line, it indicates that the pneumatic valve is currently in the closed state; when the opening mark arrow 10 is located between the open mark line and the close mark line, it indicates that the pneumatic valve is in the half-open state; since the opening indicator plate 6, the opening indicator 5 and the opening mark arrow 10 have relatively large areas, the operator can clearly see the current mechanical state of the pneumatic valve even from a slightly farther distance.

[0033] Example 2:

[0034] The difference between this embodiment and embodiment 1 is that the opening indicator 5 is provided with scale lines 9.

[0035] The usage method of this embodiment is the same as that of Embodiment 1.

[0036] Example 3:

[0037] The difference between this embodiment and embodiment 2 is that it also includes a support column 12; the support column 12 is disposed between the valve head 1 and the valve seat 2.

[0038] The usage method of this embodiment is the same as that of Embodiment 1.

[0039] Example 4:

[0040] The difference between this embodiment and embodiment 3 is that the opening indicator 5 is provided with scale lines 9. The support column 12 is disposed between the valve head 1 and the valve seat 2.

[0041] The usage method of this embodiment is the same as that of Embodiment 1.

[0042] The above embodiments are merely exemplary embodiments of this utility model and are not intended to limit this utility model. The protection scope of this utility model is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this utility model within its substance and protection scope, and such modifications or equivalent substitutions should also be considered to fall within the protection scope of this utility model.

[0043] In the description of this utility model, it should be noted that the terms "inner", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0044] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A pneumatic valve switch detection device, comprising a valve head (1) and a valve seat (2); a valve stem (3) is arranged between the valve head (1) and the valve seat (2); and is characterized in that: The valve also comprises a connecting fixing plate (4), an opening indicator (5) and an opening indicator plate (6); the connecting fixing plate (4) is detachably fixedly connected to the valve stem (3) and moves up and down with the valve stem (3); the opening indicator (5) is an "L"-shaped structure, the lower end of the opening indicator (5) is connected to the connecting fixing plate (4), and the upper end of the opening indicator (5) is bent and extends upward until it exceeds the valve head (1); an opening marking arrow (10) is provided on the opening indicator (5); the opening indicator plate (6) is arranged on the valve head (1); and a switch marking line (11) corresponding to the opening marking arrow (10) is provided on the opening indicator plate (6).

2. The pneumatic valve switch detection device according to claim 1, characterized in that: The upper and lower parts of the connecting fixing plate (4) are detachably provided with fixing plates (7).

3. The pneumatic valve switch detection device according to claim 2, characterized in that: The connecting fixing plate (4) includes a connecting plate I (701) and a connecting plate II (702); a slot (703) is provided on the side of the connecting plate I (701); a latch pin (704) matching the slot (703) is provided on the side of the connecting plate II (702); corresponding screw holes (705) are provided on the slot (703) and the latch pin (704); an arc groove (706) matching the valve stem (3) is provided on the connecting plate I (701) and the connecting plate II (702).

4. The pneumatic valve switch detection device according to claim 1, characterized in that: The connecting fixing plate (4) is provided with a through groove (8) matching the valve stem (3).

5. The pneumatic valve switch detection device according to claim 1, characterized in that: The opening indicator (5) is provided with scale lines (9).

6. The pneumatic valve switch detection device according to claim 1, characterized in that: It also comprises a support column (12); the support column (12) is arranged between the valve head (1) and the valve seat (2).

7. The pneumatic valve switch detection device according to claim 1, characterized in that: The switch marking line (11) comprises an opening marking line and a closing marking line; and text marks are written next to the opening marking line and the closing marking line.

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