A hinge truss type valve interlock mechanism with opening and closing indication

Abstract

The utility model discloses a hinge truss formula valve interlocking mechanism with open and close indication belongs to valve technical field, mechanism includes connecting rod subassembly, limit structure and valve state display device. The connecting rod subassembly both ends are fixedly connected with the valve shaft of first valve and second valve respectively, constitute hinge truss structure, drive two valve shaft synchronous rotation, make two valves present one open one close rigid interlocking state. Limit structure includes setting on the valve handle block baffle of valve shaft and two valve limit blocks fixed on the valve body, and the valve handle block baffle rotates to extreme position and is located with corresponding limit block abutment, prevent valve rotation excess. Valve state display device is used to show the complete opening, intermediate or closed state of valve. The mechanism realizes interlocking through mechanical connecting rod linkage, need not pneumatic or electric and other external power source, simple structure, low cost, and have the state indication function of direct perception, be applicable to the power source free occasion such as ship LNG fuel tank, fire fighting system.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a hinged truss valve interlocking mechanism with opening and closing indication. Background Technology

[0002] In applications such as safety valve assemblies for LNG fuel tanks, cargo handling systems, and fire protection systems on ships, the two valves on parallel pipelines usually need to maintain an interlocked state of one open and one closed to ensure system safety and prevent media cross-flow or damage to downstream equipment.

[0003] Existing valve interlocking mechanisms generally have many shortcomings. For example, the solution disclosed in patent CN201610128717 uses an operating cylinder to drive the active valve stem, which in turn drives the driven valve stem through a single linkage to achieve interlocking. This solution relies on a pneumatic power source, resulting in a complex structure and high cost. Furthermore, such mechanisms generally lack a visual display of the valve's open / closed status, making it difficult for operators to accurately judge the actual valve condition. This can easily lead to misoperation risks due to misjudgment, making it difficult to meet the application requirements of situations without a power source or requiring intrinsic safety, and thus detrimental to ensuring system safety. Utility Model Content

[0004] This invention provides a hinged truss valve interlocking mechanism with open / close indication to overcome the above-mentioned problems.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: A hinged truss valve interlocking mechanism with opening and closing indication includes a linkage assembly, a limit structure, and a valve status display device; The main pipeline is equipped with a first valve, and the bypass pipeline, which is parallel to the main pipeline, is equipped with a second valve; the valve core channel connected to the bottom of the valve shaft of the first valve and the valve core channel connected to the bottom of the valve shaft of the second valve are always arranged in a vertical direction. The two ends of the connecting rod assembly are fixedly connected to the valve shaft of the first valve and the valve shaft of the second valve, respectively; both the first valve and the second valve are provided with the limiting structure; the limiting structure includes a valve handle stop block provided on the valve shaft and two valve limiting blocks fixed on the valve body. When the valve handle stop block rotates with the valve shaft to abut against one of the valve limiting blocks, it is in a fully open state; when the valve handle stop block rotates with the valve shaft to abut against the other valve limiting block, it is in a closed state. The linkage assembly can drive the two valve shafts to rotate synchronously, so that the first valve is in a closed state and the second valve is in an open state, or so that the second valve is in a closed state and the first valve is in an open state. The valve status display device is used to display the fully open, intermediate, or closed status of the first and second valves.

[0006] Furthermore, the linkage assembly includes a first linkage, a second linkage, and a hinged linkage; the first linkage and the second linkage are arranged in parallel, and the hinged linkage is arranged in parallel with the line connecting the valve shaft of the first valve and the valve shaft of the second valve; One end of the second connecting rod is fixedly connected to the valve shaft of the second valve, and the other end of the second connecting rod is hinged to one end of the hinged connecting rod. The end of the hinged connecting rod away from the second connecting rod is hinged to the middle of the first connecting rod. One end of the first connecting rod is fixedly connected to the valve shaft of the first valve, and the other end of the first connecting rod is provided with a handle.

[0007] Furthermore, the two valve limiting blocks are respectively arranged on both sides of the valve handle stop block, and the center lines of the two valve limiting blocks are arranged vertically.

[0008] Furthermore, a lock hole is provided at the hinge joint between the hinge link and the second link, and a first positioning hole and a second positioning hole are provided on the second link; when the hinge link moves to the point where the lock hole corresponds to the first positioning hole or the second positioning hole, a padlock can pass through the lock hole and the first or second positioning hole corresponding to the lock hole to lock the hinge link and the second link, thereby locking the first valve and the second valve in the closed state or fully open state.

[0009] Furthermore, both the main pipeline and the bypass pipeline are affixed with "open" labels; When the first valve is fully open, the hinged link can cover the "open" label on the bypass pipe while exposing the "open" label on the main pipe. At this time, the second valve is closed. When the second valve is fully open, the hinged link can cover the "open" label on the main pipe while exposing the "open" label on the bypass pipe, at which point the first valve is closed.

[0010] Furthermore, the valve status display device includes a sensor and a valve status display electrically connected to the sensor. Each valve limit block is equipped with the sensor, which is used to detect the contact state between the valve handle stop and the valve limit block and to monitor the position status of the valve in real time. When the valve handle stop block rotates with the valve shaft to abut against the valve limit block, the sensor on the valve limit block can output a detection signal to the valve status display, and the valve status display shows that the valve is in a fully open state or a closed state. When the valve handle stop rotates with the valve shaft to a point where it is not in contact with either of the two valve limit blocks, neither of the two sensors outputs the detection signal, and the valve status display shows that the valve is in an intermediate state.

[0011] The beneficial effects of this utility model are: This utility model discloses a hinged truss valve interlocking mechanism with open / close indication. Through a linkage assembly, the valve shafts of the first and second valves are linked, achieving a rigid interlock between the two valves in an open-closed manner via mechanical transmission. This simplifies the structure, reduces manufacturing costs, and is suitable for scenarios without a power source. The valve handle stop and the two valve limit blocks abut against each other, ensuring accurate positioning and stopping of the first and second valves in their fully open and closed states, thus preventing damage to the valve core due to excessive rotation. A valve status display device synchronously indicates the fully open, intermediate, and closed states, allowing operators to obtain the actual open / closed status of the valves without approaching them, thereby reducing the risk of misoperation and ensuring system safety in scenarios such as LNG fuel tank safety valve assemblies, cargo handling systems, and fire protection systems, preventing media cross-contamination or damage to downstream equipment. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of a hinged truss valve interlocking mechanism with open / close indication disclosed in an embodiment of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of a hinged truss valve interlocking mechanism with open / close indication disclosed in an embodiment of this utility model. Figure 2 .

[0014] In the diagram: 1. Linkage assembly; 101. First link; 102. Second link; 103. Hinge link; 104. Handle; 105. First positioning hole; 106. Second positioning hole; 2. Main pipe; 3. First valve; 4. Bypass pipe; 5. Second valve; 6. Valve shaft; 7. Valve core channel; 8. Valve handle stop; 9. Valve limit block; 10. Open label; 11. Padlock; 12. First valve status indicator; 13. Second valve status indicator; Detailed Implementation To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0015] Example: like Figure 1-2 The figure shown is a hinged truss valve interlocking mechanism with opening and closing indication provided in this embodiment, including a connecting rod assembly 1, a limiting structure, and a valve status display device; The main pipeline 2 is equipped with a first valve 3, and the bypass pipeline 4, which is parallel to the main pipeline 2, is equipped with a second valve 5; the valve core channel 7 connected to the bottom of the valve shaft 6 of the first valve 3 and the valve core channel 7 connected to the bottom of the valve shaft 6 of the second valve 5 are always arranged in a vertical direction. The two ends of the connecting rod assembly 1 are fixedly connected to the valve shaft 6 of the first valve 3 and the valve shaft 6 of the second valve 5, respectively; the first valve 3 and the second valve 5 are both provided with the limiting structure; the limiting structure includes a valve handle stop 8 provided on the valve shaft 6 and two valve limiting blocks 9 fixed on the valve body. When the valve handle stop 8 rotates with the valve shaft 6 to abut against one of the valve limiting blocks 9, it is in a fully open state; when the valve handle stop 8 rotates with the valve shaft 6 to abut against the other valve limiting block 9, it is in a closed state. The connecting rod assembly 1 can drive the two valve shafts 6 to rotate synchronously, so that the first valve 3 is in the closed state and the second valve 5 is in the open state. Figure 2 ), or make the second valve 5 closed and the first valve 3 open ( Figure 1 ); The valve status display device is used to display the fully open, intermediate, or closed states of the first valve 3 and the second valve 5.

[0016] The valve handle stop 8 and the valve limit block 9 can be fixed to the valve shaft 6 and the valve body respectively by welding or screwing.

[0017] This utility model discloses a hinged truss valve interlocking mechanism with open / close indication. The valve shaft 6 of the first valve 3 and the valve shaft 6 of the second valve 5 are linked by a connecting rod assembly 1, achieving a rigid interlock between the two valves in an open-closed state via mechanical transmission. This simplifies the structure, reduces manufacturing costs, and is suitable for scenarios without a power source. The valve handle stop 8 and the two valve limit blocks 9 abut against each other, accurately positioning and stopping the first valve 3 and the second valve 5 between the fully open and closed states, thus preventing damage to the valve core due to excessive rotation. A valve status display device synchronously indicates the fully open, intermediate, and closed states, allowing operators to obtain the actual open / closed status of the valves without approaching them, thereby reducing the risk of misoperation and ensuring system safety in scenarios such as LNG fuel tank safety valve assemblies, cargo handling systems, and fire protection systems, preventing media cross-contamination or damage to downstream equipment.

[0018] In a specific embodiment, the linkage assembly 1 includes a first linkage 101, a second linkage 102, and a hinged linkage 103; the first linkage 101 and the second linkage 102 are arranged in parallel, and the hinged linkage 103 is arranged in parallel with the line connecting the valve shaft 6 of the first valve 3 and the valve shaft 6 of the second valve 5. One end of the second connecting rod 102 is fixedly connected to the valve shaft 6 of the second valve 5, and the other end of the second connecting rod 102 is hinged to one end of the hinged connecting rod 103. The end of the hinged connecting rod 103 away from the second connecting rod 102 is hinged to the middle of the first connecting rod 101. One end of the first connecting rod 101 is fixedly connected to the valve shaft 6 of the first valve 3, and the other end of the first connecting rod 101 is provided with a handle 104.

[0019] By setting the first connecting rod 101 and the second connecting rod 102 in parallel, and making the hinged connecting rod 103 parallel to the line connecting the valve shaft 6 of the first valve 3 and the valve shaft 6 of the second valve 5, the connecting rod assembly 1 forms a parallelogram connecting rod structure. In this structure, the first connecting rod 101 and the second connecting rod 102 remain parallel during transmission and rotate synchronously at equal angles around their respective valve shafts 6, thereby ensuring that the rotation angles of the two valve shafts 6 correspond one-to-one and are linked synchronously. With the valve core channels 7 of the first valve 3 and the second valve 5 arranged vertically, the two valves stably maintain an interlocked state of one open and one closed, and the interlocked transmission is synchronous and reliable. The operator only needs to turn the handle 104 to synchronously transmit the rotation of the first connecting rod 101 to the second connecting rod 102 through the hinged connecting rod 103, thereby driving the two valves to move together through single-point manual operation. The operation is simple and the transmission is reliable.

[0020] In a specific embodiment, the two valve limiting blocks 9 are respectively disposed on both sides of the valve handle stop block 8, and the center lines of the two valve limiting blocks 9 are arranged vertically.

[0021] By setting two valve limiting blocks 9 on both sides of the valve handle stop block 8 and making the center lines of the two valve limiting blocks 9 perpendicular, the valve handle stop block 8 can accurately abut against the corresponding valve limiting block 9 when it rotates with the valve shaft 6 to the limit position of fully open or closed state. This ensures accurate positioning at the open and closed limit positions and prevents excessive valve rotation. Both the valve handle stop block 8 and the valve limiting block 9 are rectangular blocks, which are easy to process, low in cost, and have flat abutment surfaces, ensuring the reliability and service life of the limiting contact.

[0022] In a specific embodiment, a lock hole is provided at the hinge joint between the hinge link 103 and the second link 102, and a first positioning hole 105 and a second positioning hole 106 are provided on the second link 102. When the hinge link 103 moves to the point where the lock hole corresponds to the first positioning hole 105 or the second positioning hole 106, the padlock 11 can pass through the lock hole and the first positioning hole 105 or the second positioning hole 106 corresponding to the lock hole to lock the hinge link 103 and the second link 102, thereby locking the first valve 3 and the second valve 5 in the closed state or fully open state.

[0023] By aligning the locking hole on the hinged link 103 with the first positioning hole 105 and the second positioning hole 106 on the second link 102, and by using the padlock 11 to pass through the corresponding set of locking holes and positioning holes to lock the link assembly 1, the relative positions of the first link 101, the second link 102, and the hinged link 103 are fixed in situations where a long-term open-closed interlocking state is required. This prevents the handle 104 from being misoperated or operated without authorization, meets the safety management regulations for valve locking and tagging, and further improves system safety. The padlock 11 is a general standard part and is easy to disassemble and assemble.

[0024] The first positioning hole 105 and the second positioning hole 106 can also be set on the first connecting rod 101, and the locking hole on the hinged connecting rod 103 is set at the position where it is hinged to the first connecting rod 101.

[0025] In a specific embodiment, both the main pipe 2 and the bypass pipe 4 are affixed with an "open" label 10; When the first valve 3 is fully open, the hinged connecting rod 103 can cover the open label 10 on the bypass pipe 4, while exposing the open label 10 on the main pipe 2. At this time, the second valve 5 is closed. When the second valve 5 is fully open, the hinged connecting rod 103 can cover the "open" label 10 on the main pipe 2, while exposing the "open" label 10 on the bypass pipe 4. At this time, the first valve 3 is closed.

[0026] When the first connecting rod 101 moves to be parallel to the main pipe 2, the opening label 10 on the main pipe 2 is blocked by the first connecting rod 101, and the first valve 3 is in the intermediate state at this time. When the second link 102 moves to be parallel to the bypass pipe 4, the open label 10 on the bypass pipe 4 is blocked by the second link 102, and the second valve 5 is in the intermediate state at this time.

[0027] By setting "open" labels 10 on the main pipeline 2 and the bypass pipeline 4, and using the obstruction positions of the hinged connecting rod 103, the first connecting rod 101, and the second connecting rod 102 to indicate the opening and closing status of the valves, operators can intuitively judge the interlocking status of the main pipeline 2 being open and the bypass pipeline 4 being closed, or the bypass pipeline 4 being open and the main pipeline 2 being closed, without the need for any instruments or power supply. This achieves intuitive and reliable status warnings and reduces the risk of misoperation.

[0028] In a specific embodiment, the valve status display device includes a sensor and a valve status display electrically connected to the sensor. Each valve limiting block 9 is provided with the sensor, which is used to detect whether the valve handle stop 8 and the valve limiting block 9 are in contact. When the valve handle stop 8 rotates with the valve shaft 6 to abut against the valve limit block 9, the sensor on the valve limit block 9 can output a detection signal to the valve status display, and the valve status display shows that the valve is in a fully open state or a closed state. When the valve handle stop 8 rotates with the valve shaft 6 until it is not in contact with either of the two valve limit blocks 9, neither of the two sensors outputs the detection signal, and the valve status display shows that the valve is in the intermediate state.

[0029] Sensors, which are explosion-proof, are installed on the two valve limit blocks 9 of a valve. An external display is set in the remote control room. The external display includes a first valve status display 12 and a second valve status display 13. The sensor of the first valve 3 is electrically connected to the first valve status display 12, and the sensor of the second valve 5 is electrically connected to the second valve status display 13. When the valve handle stop 8 rotates with the valve shaft 6 to abut against the valve limit block 9, the corresponding sensor outputs a detection electrical signal to the corresponding valve status display. This allows the remote control room to monitor the valve in real time whether it is in a closed, open, or intermediate state. Operators can know the actual status of the valve in real time without going to the site, thereby improving monitoring efficiency. The sensors are explosion-proof and suitable for flammable and explosive environments such as LNG fuel tanks.

[0030] In this embodiment, the valve status indicator is a display panel, which can display different colors to correspond to three states, such as green when the valve is fully open, red when it is closed, and yellow when it is in the middle state; the sensor is an explosion-proof micro switch; the sensor and the display panel are both conventional devices, and their signal transmission and display principles are well known to those skilled in the art, and will not be described in detail here.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A hinged truss valve interlocking mechanism with open / close indication, characterized in that, Includes a connecting rod assembly (1), a limit structure, and a valve status display device; The main pipeline (2) is equipped with a first valve (3), and the bypass pipeline (4) which is parallel to the main pipeline (2) is equipped with a second valve (5); the valve core channel (7) connected to the bottom of the valve shaft (6) of the first valve (3) and the valve core channel (7) connected to the bottom of the valve shaft (6) of the second valve (5) are always arranged in a vertical direction. The two ends of the connecting rod assembly (1) are fixedly connected to the valve shaft (6) of the first valve (3) and the valve shaft (6) of the second valve (5), respectively; the first valve (3) and the second valve (5) are both provided with the limiting structure; the limiting structure includes a valve handle stop (8) set on the valve shaft (6) and two valve limiting blocks (9) fixed on the valve body. When the valve handle stop (8) rotates with the valve shaft (6) to abut against one of the valve limiting blocks (9), it is in a fully open state. When the valve handle stop (8) rotates with the valve shaft (6) to abut against the other valve limiting block (9), it is in a closed state. The connecting rod assembly (1) can drive the two valve shafts (6) to rotate synchronously so that the first valve (3) is in a closed state and the second valve (5) is in an open state, or so that the second valve (5) is in a closed state and the first valve (3) is in an open state; The valve status display device is used to display the fully open, intermediate, or closed status of the first valve (3) and the second valve (5).

2. The hinged truss valve interlocking mechanism with open / close indication according to claim 1, characterized in that, The linkage assembly (1) includes a first linkage (101), a second linkage (102), and a hinged linkage (103); the first linkage (101) and the second linkage (102) are arranged in parallel, and the hinged linkage (103) is arranged in parallel with the line connecting the valve shaft (6) of the first valve (3) and the valve shaft (6) of the second valve (5); One end of the second connecting rod (102) is fixedly connected to the valve shaft (6) of the second valve (5), and the other end of the second connecting rod (102) is hinged to one end of the hinged connecting rod (103). The end of the hinged connecting rod (103) away from the second connecting rod (102) is hinged to the middle of the first connecting rod (101). One end of the first connecting rod (101) is fixedly connected to the valve shaft (6) of the first valve (3), and the other end of the first connecting rod (101) is provided with a handle (104).

3. The hinged truss valve interlocking mechanism with open / close indication according to claim 2, characterized in that, The two valve limiting blocks (9) are respectively set on both sides of the valve handle stop block (8), and the center lines of the two valve limiting blocks (9) are set vertically.

4. The hinged truss valve interlocking mechanism with open / close indication according to claim 2, characterized in that, The hinge link (103) is provided with a lock hole at the hinge point with the second link (102), and the second link (102) is provided with a first positioning hole (105) and a second positioning hole (106). When the hinge link (103) moves to the point where the lock hole corresponds to the first positioning hole (105) or the second positioning hole (106), the hinge link (103) and the second link (102) can be locked by passing a padlock (11) through the lock hole and the first positioning hole (105) or the second positioning hole (106) corresponding to the lock hole, so as to lock the first valve (3) and the second valve (5) in the closed state or fully open state.

5. The hinged truss valve interlocking mechanism with open / close indication according to claim 2, characterized in that, Both the main pipeline (2) and the bypass pipeline (4) are affixed with "open" labels (10); When the first valve (3) is fully open, the hinged connecting rod (103) can cover the open label (10) on the bypass pipe (4) and expose the open label (10) on the main pipe (2). At this time, the second valve (5) is closed. When the second valve (5) is fully open, the hinged connecting rod (103) can cover the open label (10) on the main pipe (2) and expose the open label (10) on the bypass pipe (4). At this time, the first valve (3) is closed.

6. The hinged truss valve interlocking mechanism with open / close indication according to claim 1, characterized in that, The valve status display device includes a sensor and a valve status display electrically connected to the sensor. Each valve limit block (9) is provided with the sensor. The sensor is used to detect the contact state between the valve handle stop (8) and the valve limit block (9) and to monitor the position status of the valve in real time. When the valve handle stop (8) rotates with the valve shaft (6) to abut against the valve limit block (9), the sensor on the valve limit block (9) can output a detection signal to the valve status display, and the valve status display shows that the valve is in a fully open state or a closed state. When the valve handle stop (8) rotates with the valve shaft (6) to the point where it does not contact either of the two valve limit blocks (9), neither of the two sensors outputs the detection signal, and the valve status display shows that the valve is in the intermediate state.

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