An isolation lock blind device

Abstract

The utility model relates to pipeline technical field especially, relates to a kind of isolation locking blanking plate device, including the blind plate rotatablely connected with cylinder, the blind plate is sealingly connected with the cylinder, locking device is set on the blind plate, safety interlocking device is provided on the cylinder, the safety interlocking device includes mechanical lock and blind plate pull ring lock tongue, the blind plate pull ring lock tongue is used to limit the opening of the locking device or the closing of blind plate, the blind plate pull ring lock tongue can be inserted or exited the lock head hole of the mechanical lock, the mechanical lock only when the blind plate pull ring lock tongue is completely inserted lock head hole, the mechanical lock can only execute the insertion or exit operation of the blind plate pull ring lock tongue.The utility model provides a kind of isolation locking blanking plate device, can realize the supervision to the opening or closing state of blind plate, can effectively prevent the security problem caused by accidental touch, arbitrary rotation operation.

Description

Technical Field

[0001] This utility model relates to the field of pipeline technology, and in particular to an isolation and locking blind flange device. Background Technology

[0002] Blind flanges, also known as quick-opening blind flanges, are key equipment components widely used in industries such as oil and gas, chemical, aerospace, and power. They are primarily used to seal and isolate circular openings in pressure pipelines or pressure vessels. Their core function is to enable rapid opening and closing when equipment needs maintenance, cleaning, filter replacement, or internal inspection, thereby improving operational efficiency and ensuring system safety.

[0003] A typical quick-opening blind flange generally consists of a cylindrical flange, a cover, a hook or clamp, a sealing ring, a safety interlock mechanism, an opening and closing mechanism, a swing arm, and, if necessary, a short section. This device is suitable for industrial applications where the cover needs to be frequently installed and removed. To ensure safety, most blind flange designs require that the system can only be pressurized and operated after the cover is fully closed and locked to the predetermined position; conversely, the blind flange can only be opened after the pressure in the pressure pipeline or container has been completely released, preventing serious safety accidents such as cover popping out and media splashing due to pressurized operation.

[0004] However, existing blind flange devices lack monitoring of the opening and closing of the blind flange, and are insufficiently protected against human error, making it difficult to meet the stringent requirements for intrinsic safety and control in high-risk industrial sectors. Utility Model Content

[0005] In view of the above-mentioned shortcomings of current blind flange devices, this utility model provides an isolation and locking blind flange device, which can monitor the open or closed state of the blind flange and effectively prevent safety problems caused by accidental contact or arbitrary rotation.

[0006] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions:

[0007] An isolation locking blind plate device includes a blind plate rotatably connected to a cylinder body, the blind plate being sealed to the cylinder body, a locking device being provided on the blind plate, and a safety interlocking device being provided on the cylinder body. The safety interlocking device includes a mechanical lock and a blind plate pull ring latch. The blind plate pull ring latch is used to restrict the opening of the locking device or the closing of the blind plate. The blind plate pull ring latch can be inserted into or withdrawn from the lock head hole of the mechanical lock. The mechanical lock can only perform the insertion or withdrawal operation of the blind plate pull ring latch when the blind plate pull ring latch is fully inserted into the lock head hole.

[0008] According to one aspect of the present invention, a pressure relief rod is provided on the blind plate. The pressure relief rod is disposed in the internal space of the blind plate pull ring latch. When the blind plate pull ring latch is not disengaged from the mechanical lock, the pressure relief rod cannot perform pressure relief operation.

[0009] According to one aspect of the present invention, the locking device includes an opening and closing mechanism, one end of which is connected to one end of a locking ring and the other end of which is connected to the other end of the locking ring. A handle seat is provided at one end of the opening and closing mechanism, and a handle is provided on the handle seat.

[0010] According to one aspect of the present invention, the blind plate is provided with an interlocking plate, which is detachably connected to the edge of the outer end face of the blind plate.

[0011] According to one aspect of the present invention, a pull ring is provided on the blind plate pull ring latch, the pull ring is connected to one end of the chain, and the other end of the chain is connected to the mounting plate of the mechanical lock.

[0012] According to one aspect of the present invention, the mechanical lock includes a lock cylinder and a key, wherein the lock cylinder is connected to the lock head hole.

[0013] According to one aspect of the present invention, two lock head holes are provided on one side of the lock cylinder, and the axes of the two lock head holes are perpendicular to each other.

[0014] According to one aspect of this utility model, the mechanical lock is provided with a nameplate.

[0015] According to one aspect of the present invention, the safety interlocking device is provided with a function expansion module interlocking device, which controls the opening and closing of the expansion function device.

[0016] According to one aspect of the present invention, the extended functional device includes a purging device and / or a rinsing device.

[0017] The advantages of this utility model are as follows: The safety interlock device 4 enables monitoring of the blind flange's open and closed status, preventing opening or closing without an authorized key. This effectively prevents accidents caused by misoperation, accidental contact, or arbitrary rotation, significantly improving the safety of the blind flange device. The inclusion of a chain and pull ring ensures the blind flange pull ring latch is securely mounted on the mounting plate, preventing the risk of latch loss or accidental fall during operation, thus greatly improving safety and reliability. The pressure relief rod releases pressure within the pipeline, preventing excessive pressure and serious accidents such as cover ejection or media splashing during blind flange operation. Using the pressure relief rod as a removal tool on the interlock plate ensures the blind flange is opened only after pressure relief, greatly reducing the probability of accidents. The blind flange pull ring latch can only be operated by rotating the lock cylinder with a key after full insertion, ensuring key access control and more effectively controlling the opening and closing of the blind flange. By setting up an interlocking device for the functional expansion modules, the expansion functional devices can be interlocked, realizing the opening and closing control of the expansion functional devices. This utility model provides an isolation and locking blind plate device, which can monitor the open or closed state of the blind plate and effectively prevent safety problems caused by accidental contact or arbitrary rotation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of an isolation locking blind plate device according to the present invention;

[0020] Figure 2 This is a top view of an isolation locking blind plate device according to the present invention;

[0021] Figure 3 This is a schematic diagram of the expansion module interlocking device and the safety interlocking device of the isolation locking blind plate device described in this utility model;

[0022] Figure 4 This is a schematic diagram of the blind plate pull ring locking tongue part of the isolation locking blind plate device of this utility model.

[0023] Numbering on the map:

[0024] 1. Locking device; 11. Handle; 12. Handle seat; 13. Opening and closing mechanism; 2. Pressure relief rod; 3. Interlocking plate; 4. Safety interlocking device; 41. Mechanical lock; 411. Key; 412. Lock cylinder; 413. Lock head hole; 42. Blind plate pull ring lock tongue; 43. Chain; 44. Pull ring; 45. Chain fixing device; 5. Blind plate; 6. Cylinder; 7. Mounting plate; 8. Expansion module interlocking device; 81. Expansion mechanical lock; 811. Expansion lock cylinder; 812. Expansion key; 9. Rotary arm pressing mechanism; 10. Lock ring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing this application and for 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Example 1

[0028] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, an isolation locking blind flange device is widely used in industrial fields such as oil and gas, chemical industry, aerospace, and power energy. It includes a blind flange 5 rotatably connected to a cylindrical body 6. The cylindrical body 6 has a locking ring groove and a sealing surface. A locking ring 10, typically C-shaped, is installed in the locking ring groove. The blind flange 5 is sealed to the cylindrical body 6 via a sealing ring. A locking device 1 is provided on the blind flange 5, configured to either open or lock the blind flange 5. The locking device 1 includes an opening and closing mechanism 13, one end of which is connected to one end of the locking ring 10, and the other end to the other end. A handle seat 12 is provided at one end of the opening and closing mechanism 13, with a handle 11 on the handle seat 12. Rotation of the handle 11 causes the locking ring 10 to open and close, thus opening and locking the blind flange. The cylinder 6 is equipped with a safety interlocking device 4, which includes a mechanical lock 41 and a blind plate pull ring latch 42. The blind plate pull ring latch 42 is used to restrict the opening of the locking device 1 or the closing of the blind plate 5. The blind plate pull ring latch 42 can be inserted into or withdrawn from the lock head hole 413 of the mechanical lock 41. The mechanical lock 41 can only perform the insertion or withdrawal operation of the blind plate pull ring latch 42 when the blind plate pull ring latch 42 is fully inserted into the lock head hole 413.

[0029] In this embodiment, the opening and closing mechanism 13 is C-shaped, and the blind flange pull ring latch 42 is disposed inside the C-shape. The blind flange pull ring latch 42 can restrict the movement of the opening and closing mechanism 13, thereby controlling the opening of the blind flange. After the blind flange is opened, when there is no need to close the blind flange, the blind flange pull ring latch 42 can be inserted into the lock head hole 413 of the mechanical lock 41. This time, the blind flange pull ring latch 42 blocks the blind flange, preventing the blind flange from reaching the tube sheet and ensuring that the pressure inside the pipeline meets the process requirements.

[0030] In this embodiment, the mechanical lock includes a lock cylinder 412 and a key 411, with the lock cylinder 412 connected to the lock head hole 413. The key 411 controls the lock cylinder 412 to rotate and unlock, thereby unlocking the blind plate pull ring latch 42. When the blind plate pull ring latch 42 is not inserted or not fully inserted into the lock head hole 413, the key 411 cannot be rotated, thus preventing the blind plate pull ring latch 42 from being locked due to operator error and potential safety accidents.

[0031] In this embodiment, two lock head holes 413 are provided on one side of the lock cylinder 412. The axes of the two lock head holes 413 are perpendicular to each other. Preferably, depending on the installation direction of the mechanical lock 41, if the mechanical lock 41 is installed on the left side of the blind plate 5, then one lock head hole is located on the right side in the horizontal direction and the other is located on the lower side in the vertical direction. If the mechanical lock 41 is installed on the right side of the blind plate 5, then one lock head hole is located on the left side in the horizontal direction and the other is located on the lower side in the vertical direction. That is, the direction of the two lock head holes 413 needs to be set according to the position of the locking device 1, so as to realize the control of the opening and closing direction of the blind plate.

[0032] In this embodiment, a pressure relief rod 2 is provided on the blind plate 5. The pressure relief rod 2 is located inside the blind plate pull ring latch 42. When the blind plate pull ring latch 42 is not disengaged from the mechanical lock 41, the pressure relief rod 2 cannot perform pressure relief operation. The pressure relief rod 2 is provided with a screw hole, which facilitates the insertion of the handle 11 for pressure relief operation. The blind plate pull ring latch 42 surrounds the pressure relief rod 2. Therefore, the handle 11 can only be inserted into the screw hole for pressure relief operation after the blind plate pull ring latch 42 is unlocked by the key 411.

[0033] In this embodiment, the blind plate 5 is provided with an interlocking plate 3, which is detachably connected to the outer end face edge of the blind plate 5. The interlocking plate 3 is provided with a threaded hole, and a bolt is provided at one end of the pressure relief rod 2 located inside the blind plate. The bolt is screwed into the threaded hole to remove the interlocking plate 3 from the locking ring groove.

[0034] In this embodiment, a pull ring 44 is provided on the blind plate pull ring latch 42. The pull ring 44 is connected to one end of the chain 43, and the other end of the chain 43 is connected to the mounting plate 7 of the mechanical lock 41. The mechanical lock 41 is fixedly mounted on the cylinder 6 via the mounting plate 7. A chain fixing device 45 is provided on the mounting plate, which fixes the chain to the mounting plate 7. Preferably, the mounting plate 7 is provided with a chain hole for accommodating the chain, and the chain fixing device 45 can be a screw, which passes through the chain and fixes it into the chain hole. By providing the chain 43, pull ring 44, etc., the latch can be effectively and securely fixed to the mounting plate 7, avoiding the risk of the latch being lost or accidentally falling during operation, thereby greatly improving the safety and reliability of use.

[0035] In this embodiment, the mechanical lock 41 is provided with a nameplate for engraving text content to meet the user's coding requirements for different devices and facilitate user management.

[0036] The advantages of this embodiment are as follows: The safety interlock device 4 enables monitoring of the blind flange's open and closed status, preventing opening or closing without an authorized key. This effectively prevents accidents caused by misoperation, accidental contact, or arbitrary rotation, significantly improving the safety of the blind flange device. The inclusion of chains and pull rings ensures the blind flange's pull ring latch is securely mounted on the mounting plate, preventing the latch from being lost or accidentally falling during operation, thus greatly improving safety and reliability. The pressure relief rod releases pressure within the pipeline, preventing excessive pressure and serious accidents such as cover ejection or media splashing during blind flange operation. Using the pressure relief rod as a removal tool on the interlock plate ensures the blind flange is opened only after pressure is released, greatly reducing the probability of accidents. The blind flange's pull ring latch can only be operated by rotating the lock cylinder with a key after full insertion, ensuring key access control and more effectively controlling the opening and closing of the blind flange. This embodiment provides an isolation and locking blind flange device, which can monitor the open or closed state of the blind flange and effectively prevent safety problems caused by accidental contact or arbitrary rotation.

[0037] Example 2

[0038] The difference between this embodiment and Embodiment 1 is that the safety interlock device 4 is equipped with a functional expansion module interlock device 8, which controls the opening and closing of the expansion function device. The expansion function device includes a purging device and / or a flushing device. Of course, depending on process requirements, the expansion function device may also include other devices, such as a pressure testing device. The expansion module interlock device 8 includes an expansion mechanical lock 81 and an expansion bolt (not shown in the figure). The expansion mechanical lock 81 includes an expansion lock cylinder 811 and an expansion key 812. The expansion mechanical lock 81 is provided with a lock head hole 413. The expansion bolt is connected to the expansion function device and is inserted into the lock head hole. Similarly, the expansion key 812 can only be rotated when the expansion bolt is fully inserted into the lock head hole 413. The expansion key 812 cannot be rotated if the expansion bolt is not inserted or not fully inserted. The purging device is used to purge the inside of the pipeline, and the flushing device is used to flush the inside of the pipeline. The expansion function device can only be operated after the blind flange is opened. During operation, the operator needs to obtain key 411 to open the blind plate before obtaining expansion key 812 to activate the expansion function device. After the expansion function device is locked, the operator must return expansion key 812 before obtaining key 411 again to close the blind plate.

[0039] The working principle or operating procedure in this implementation is as follows: When it is necessary to open the blind flange, a special key 411 must first be obtained through a strict authorization procedure. After obtaining the key 411, the key is used to unlock the blind flange pull ring latch 42. After unlocking, the blind flange pull ring latch 42 is removed from its fixed position, at which point the pressure relief rod 2 will be exposed. Next, the operating handle 11 is removed and inserted into the screw hole on the pressure relief rod 2. By rotating the handle 11, the pressure relief rod 2 is gradually loosened and finally completely removed. This series of operations allows the pressure in the pipeline to be released slowly and evenly, thereby effectively reducing the risk of the blind flange suddenly popping out during the opening process.

[0040] Subsequently, using the bolt end of the pressure relief rod, screw it into the threaded hole of the interlocking plate 3, and disengage and remove the interlocking plate 3 from the lock ring groove. Next, place the operating handle 11 into the handle seat 12, and rotate the operating handle 11 to the preset open position until the blind plate is fully opened. After the blind plate is opened, if it is necessary to purge or clean the pipeline, and therefore the blind plate cannot be closed, the blind plate pull ring latch 42 can be inserted into the lock head hole 413. In this way, the blind plate is in a state that cannot be closed. Only after the operator returns the key 411 can the extension key 812 be authorized to start the purging or flushing device, start the purging or flushing function, and after the purging or flushing is completed, relock the extension function device and return the extension key 812. Only after re-authorizing the key 411 can the blind plate pull ring latch 42 be unlocked. Then, close the blind plate and insert the blind plate pull ring latch 42 to lock the blind plate, and then return the key 411. By performing the above operations, the open or closed status of the blind flange can be strictly monitored, effectively preventing safety risks caused by accidental contact or arbitrary rotation of the operating handle, and ensuring the safety and reliability of the entire operation process.

[0041] The advantage of this embodiment is that by setting the interlocking device 8 of the function expansion module, the expansion function device can be interlocked to realize the opening and closing control of the expansion function device.

[0042] The advantages of this utility model are as follows: The safety interlock device 4 enables monitoring of the blind flange's open and closed status, preventing opening or closing without an authorized key. This effectively prevents accidents caused by misoperation, accidental contact, or arbitrary rotation, significantly improving the safety of the blind flange device. The inclusion of a chain and pull ring ensures the blind flange pull ring latch is securely mounted on the mounting plate, preventing the risk of latch loss or accidental fall during operation, thus greatly improving safety and reliability. The pressure relief rod releases pressure within the pipeline, preventing excessive pressure and serious accidents such as cover ejection or media splashing during blind flange operation. Using the pressure relief rod as a removal tool on the interlock plate ensures the blind flange is opened only after pressure relief, greatly reducing the probability of accidents. The blind flange pull ring latch can only be operated by rotating the lock cylinder with a key after full insertion, ensuring key access control and more effectively controlling the opening and closing of the blind flange. By setting up an interlocking device for the functional expansion modules, the expansion functional devices can be interlocked, realizing the opening and closing control of the expansion functional devices. This utility model provides an isolation and locking blind plate device, which can monitor the open or closed state of the blind plate and effectively prevent safety problems caused by accidental contact or arbitrary rotation.

[0043] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A blind flange isolation locking device, comprising a blind flange (5) rotatably connected to a cylinder (6), the blind flange (5) being sealed to the cylinder (6), characterized in that, A locking device (1) is provided on the blind plate (5), and a safety interlock device (4) is provided on the cylinder (6). The safety interlock device (4) includes a mechanical lock (41) and a blind plate pull ring latch (42). The blind plate pull ring latch (42) is used to restrict the opening of the locking device (1) or the closing of the blind plate (5). The blind plate pull ring latch (42) can be inserted into or withdrawn from the lock head hole (413) of the mechanical lock (41). The mechanical lock (41) can only perform the insertion or withdrawal operation of the blind plate pull ring latch (42) when the blind plate pull ring latch (42) is fully inserted into the lock head hole (413).

2. The isolation locking blind plate device according to claim 1, characterized in that, A pressure relief rod (2) is provided on the blind plate (5). The pressure relief rod (2) is located in the internal space of the blind plate pull ring lock tongue (42). When the blind plate pull ring lock tongue (42) is not disengaged from the mechanical lock (41), the pressure relief rod (2) cannot perform pressure relief operation.

3. The isolation locking blind plate device according to claim 2, characterized in that, The locking device (1) includes an opening and closing mechanism (13), one end of which is connected to one end of the locking ring (10) and the other end is connected to the other end of the locking ring (10). A handle seat (12) is provided on one end of the opening and closing mechanism (13), and a handle (11) is provided on the handle seat (12).

4. The isolation locking blind plate device according to claim 3, characterized in that, The blind plate (5) is provided with an interlocking plate (3), which is detachably connected to the edge of the outer end face of the blind plate (5).

5. The isolation locking blind plate device according to claim 1, characterized in that, The blind plate pull ring latch (42) is provided with a pull ring (44), which is connected to one end of the chain (43), and the other end of the chain (43) is connected to the mounting plate (7) of the mechanical lock (41).

6. The isolation locking blind plate device according to claim 1, characterized in that, The mechanical lock includes a lock cylinder (412) and a key (411), and the lock cylinder (412) is connected to the lock head hole (413).

7. The isolation locking blind plate device according to claim 6, characterized in that, The lock cylinder (412) has two lock holes (413) on one side, and the axes of the two lock holes (413) are perpendicular to each other.

8. The isolation locking blind plate device according to claim 6, characterized in that, The mechanical lock (41) is provided with a nameplate (414).

9. The isolation locking blind plate device according to any one of claims 1 to 8, characterized in that, The safety interlock device (4) is equipped with a function expansion module interlock device (8), which controls the opening and closing of the expansion function device.

10. The isolation locking blind plate device according to claim 9, characterized in that, The extended functional device includes a purging device and / or a flushing device.

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