Safety self-locking quick-opening blind plate

Abstract

The utility model provides a safe self -locking formula quick -opening blind plate, specifically related to quick -opening blind plate technical field, its characterized by: the inner wall of cover is equipped with sealing ring, and outside is fixed by left clamp and right clamp clamping, left clamp and right clamp top connection fixed establishment, fixed establishment includes the fixed box of setting in left and right clamps top, the hydraulic cylinder of fixed box top setting, the hydraulic rod of setting in fixed box and transmission assembly connected with hydraulic rod, the utility model discloses through left, right clamp and the cooperation design of hydraulic drive mechanism, adopts the hydraulic cylinder drive transmission assembly of setting in fixed box, drives left, right connecting rod synchronous movement, has realized the quick closing and opening of clamp, combines the screw groove alignment structure of first, second locking block between cover and clamp, cooperates the threaded rod of self -locking mechanism and passes through the connection, forms double locking mechanism, makes the degree of mechanization of locking process high, and the efficiency of traditional bolt fastening mode is effectively improved, and the closing precision improves obviously.

Description

Technical Field

[0001] This utility model relates to the field of quick-opening blind flange technology, specifically to a safe self-locking quick-opening blind flange. Background Technology

[0002] Quick-opening blind flanges are key opening and closing components for equipment such as pressure vessels and oil and gas pipelines. Their safety and ease of operation directly affect the efficiency of equipment maintenance. Traditional quick-opening blind flanges mostly use mechanical clamps and bolt fastening structures, which have technical defects such as uneven sealing pressure and complex opening and closing operations. They are also prone to media leakage accidents under high-pressure conditions.

[0003] In the prior art, Chinese patent CN221097426U discloses a locking mechanism for a locking ring type quick-opening blind flange, including a cover plate. A drive handle is rotatably connected to one side of the outer wall of the cover plate, and a bevel gear is fixedly connected to one side of the outer wall of the drive handle. A lead screw is rotatably connected to one side of the inner wall of the cover plate, and a bevel gear is fixedly connected to one end of the lead screw. The bevel gear and the bevel gear mesh. A slide rail is fixedly connected to one side of the inner wall of the cover plate, and a slider is slidably connected to the outer wall of the slide rail. The inner side of the slider is threadedly connected to the outer wall of the lead screw. In this invention, the drive handle drives the bevel gear to rotate, which in turn drives the lead screw to rotate. This allows the slider to slide outward and lift one end of the movable buckle to rotate, ultimately fixing it to the fixed block. This solves the problem that fixing the blind flange from the inside can easily cause wear to the inner wall of the pressure tube, and saves on the production cost of the blind flange.

[0004] However, the following technical defects exist:

[0005] 1. The lack of automatic locking function may cause the slider to shift due to the reverse rotation of the lead screw, which may lead to locking failure and safety hazards.

[0006] 2. Insufficient transmission stability requires sequential operation of components such as the drive handle, movable buckle, and threaded rod, which is cumbersome. Furthermore, the tightening force of the screw rod depends on manual experience, which can easily lead to uneven pressure on the sealing ring and its failure.

[0007] 3. There is no intuitive indication of the locking status, and operators cannot determine whether it is fully locked, which may lead to misoperation, especially in low light or emergency situations.

[0008] 4. The combination of bevel gear transmission and multi-screw linkage increases the risk of component wear, resulting in high maintenance costs. Furthermore, the gear meshing clearance can easily lead to transmission errors, affecting locking accuracy. Utility Model Content

[0009] The purpose of this invention is to provide a safe, self-locking, quick-opening blind flange to solve the problems mentioned in the background art.

[0010] To achieve the above objectives, this utility model provides the following technical solution: a safe self-locking quick-opening blind flange, comprising a cover plate, a left clamp, a right clamp, a fixing mechanism, and a self-locking mechanism, characterized in that: the inner wall of the cover plate is provided with a sealing ring, and the outside is fixed by the left clamp and the right clamp, and the top of the left clamp and the right clamp are connected to the fixing mechanism;

[0011] The fixing mechanism includes a fixing box set on the top of the left and right clamps, a hydraulic cylinder set on the top of the fixing box, a hydraulic rod set inside the fixing box, and a transmission assembly connected to the hydraulic rod;

[0012] A first locking block is fixedly provided on one side surface of the left clamp, and a threaded groove is provided through the center of the first locking block;

[0013] The cover plate is provided with a second locking block on one side surface adjacent to the left clamp, and the center of the second locking block is also provided with a threaded groove.

[0014] The threaded grooves at the center of the first locking block and the second locking block are parallel and interconnected, and the two threaded grooves are connected and fixed by a self-locking mechanism.

[0015] Preferably, when the cover plate is closed with the left and right clamps, the surfaces of the first locking block and the second locking block are in contact.

[0016] Preferably, the tops of the left and right clamps are located inside the fixed box, and are closed or opened within the fixed box via a transmission assembly.

[0017] Preferably, the transmission assembly includes a connecting plate, a left connecting rod, and a right connecting rod. The top of the connecting plate is fixedly connected to the end of the hydraulic rod, and the connecting plate has one end of the left connecting rod and the right connecting rod, which are connected by a pin. The other end of the left connecting rod and the right connecting rod are connected to the top of the left clamp and the right clamp by a pin.

[0018] Preferably, the self-locking mechanism includes a threaded rod, a self-locking rod, a second handle, a clamping assembly, and a self-locking component. The threaded rod is threadedly connected to the threaded grooves on the surfaces of the first and second locking blocks, and the clamping assembly is sleeved on the surface of the threaded rod. The clamping assembly fixes the surface of the second locking block through a threaded connection. A self-locking rod is provided at the center inside the threaded rod. One end of the threaded rod is connected to the second handle, and the other end of the threaded rod has no threads. A self-locking component is provided inside the handle and connected to the front end of the self-locking rod.

[0019] Preferably, the clamping assembly includes a locking seat and a first handle. The locking seat is sleeved on the outside of the threaded rod and threadedly connected thereto, and the first handle is vertically fixed on its surface. The locking seat and the second locking lever are tightly fitted together by rotating the first handle.

[0020] Preferably, the self-locking assembly includes a locking plate, a locking plate groove, and a compression spring. The front end surface of the spiral rod is symmetrically provided with locking plate grooves. A locking plate is provided in the locking plate groove and fixed by a pin. One end of the locking plate is engaged in a symmetrically provided groove on the front end surface of the self-locking rod. The front end of the self-locking rod has a T-shaped structure and is externally fitted with a compression spring. The compression spring and the front end of the self-locking rod are disposed in a telescopic groove provided inside the threaded rod.

[0021] The second handle has a self-locking button at its center. The self-locking button is connected to the end of the self-locking rod. By pulling the self-locking button, the locking plate automatically tilts and abuts against the back of the first locking block under the action of the groove to complete the self-locking. Then, by pressing down the self-locking button, the self-locking rod extends and retracts into the telescopic groove under the action of the compression spring, and the locking plate completes the closing.

[0022] The beneficial effects of this utility model are:

[0023] 1. This utility model, through the coordinated design of left and right clamps and hydraulic drive mechanism, uses a hydraulic cylinder drive transmission component set in the fixed box to drive the left and right connecting rods to move synchronously, realizing the rapid closing and opening of the clamps; combined with the threaded groove alignment structure of the first and second locking blocks between the cover plate and the clamps, and the threaded rod of the self-locking mechanism through connection, a double locking mechanism is formed, which makes the locking process highly mechanized, effectively improving efficiency compared with the traditional bolt fastening method, and significantly improving the closing accuracy.

[0024] 2. The self-locking mechanism adopts an innovative design that links the locking plate and the compression spring. When the self-locking rod extends under the action of the spring force, the T-shaped end drives the locking plate to expand outward, so that it locks the back of the first locking block to form a mechanical self-lock. When the internal pressure increases, this structure can generate a reverse reinforcing locking force, effectively preventing accidental opening caused by pressure fluctuations. The self-locking component can effectively withstand the reverse impact of the working pressure, improving safe locking and fixing.

[0025] 3. By setting up a first handle to drive the locking seat for pre-tightening and a second handle for pressing or pulling the self-locking button, the operator only needs to rotate the handle to complete the initial positioning and then press the self-locking button to automatically complete the final locking. The synergistic effect of the hydraulic system and the mechanical self-locking reduces the opening / closing operation force to the manual time of the traditional structure, which is especially suitable for frequent opening and closing conditions and greatly reduces the operation time. Attached Figure Description

[0026] Figure 1 This is a side sectional view of the present invention.

[0027] Figure 2 This is a front view structural diagram of the present utility model.

[0028] Figure 3 This is a schematic diagram of the closed fixing mechanism of this utility model.

[0029] Figure 4 This is a schematic diagram of the opening and closing of the fixing mechanism of this utility model.

[0030] Figure 5 This is a schematic diagram of the opening, closing, and shutting of the self-locking mechanism of this utility model.

[0031] The components in the attached diagram are labeled as follows: 1: Cover plate; 101: Sealing ring; 2: Left clamp; 3: Right clamp; 4: Fixing mechanism; 41: Fixing box; 42: Hydraulic cylinder; 43: Hydraulic rod; 44: Transmission assembly; 441: Connecting plate; 442: Left connecting rod; 443: Right connecting rod; 5: First locking block; 6: Second locking block; 7: Self-locking mechanism; 71: Threaded rod; 711: Telescopic groove; 72: Self-locking rod; 721: Groove; 73: Second handle; 74: Clamping assembly; 741: Locking seat; 742: First handle; 75: Self-locking assembly; 751: Card plate; 752: Card plate groove; 753: Compression spring; 8: Threaded groove; 9: Self-locking button. Detailed Implementation

[0032] Although this invention may be described with respect to a particular application or industry, those skilled in the art will recognize its broader applicability. Those skilled in the art will understand that terms such as "above," "below," "upward," "downward," etc., are used to describe the drawings and not to indicate a limitation on the scope of the invention as defined by the appended claims. Any numerical designations such as "first" or "second" are merely illustrative and not intended to limit the scope of the invention in any way.

[0033] like Figure 1-5 As shown, this embodiment of a safety self-locking quick-opening blind flange includes a cover plate 1, a left clamp 2, a right clamp 3, a fixing mechanism 4, and a self-locking mechanism 7. The inner wall of the cover plate 1 is fitted with a high-pressure resistant sealing ring 101 that fits against the pressure pipeline. The left clamp 2 and the right clamp 3 are symmetrically arranged on the outer circumference of the cover plate 1 and are opened or closed synchronously through the fixing mechanism 4 with the top hinge. The side wall of the left clamp 2 is welded with a first locking block 5, and the cover plate 1 is provided with a second locking block 6 at the corresponding position. The two locking blocks are coaxially provided with a threaded groove 8, and the self-locking mechanism 7 is installed through the threaded groove 8.

[0034] The fixing mechanism 4 consists of a fixing box 41, a hydraulic cylinder 42, a hydraulic rod 43, and a transmission assembly 44. The fixing box 41 is welded to the outer wall of the equipment flange, and the hydraulic cylinder 42 is installed on its top. The hydraulic rod 43 extends into the fixing box 41 and is rigidly connected to the connecting plate 441. The connecting plate 441 is hinged to the left connecting rod 442 and the right connecting rod 443 by a pin. The other ends of the left and right connecting rods are respectively hinged to the top of the left clamp 2 and the right clamp 3. When the hydraulic cylinder 42 extends or retracts, it drives the linkage mechanism to drive the left and right clamps to complete the radial opening and closing motion. After closing, the cover plate 1 and the end face of the equipment flange form a seal through the sealing ring 101.

[0035] The self-locking mechanism 7 includes a threaded rod 71, a self-locking rod 72, a second handle 73, a clamping assembly 74, and a self-locking assembly 75. The threaded rod 71 passes through the threaded grooves 8 of the first locking block 5 and the second locking block 6 and is screwed into them for fixation. The locking seat 741 of the clamping assembly 74 is sleeved on the outside of the threaded rod 71. By rotating the first handle 742, the locking seat 741 is pushed to press against the side of the second locking block 6 to achieve pre-tight fixation. The front end surface of the threaded rod 71 is symmetrically provided with a retaining plate groove 752, and a retaining plate 751 fixed by a pin is provided in the retaining plate groove 752. One end of the locking plate 751 is engaged in a symmetrically formed groove 721 on the front surface of the self-locking rod 72. The front end of the self-locking rod 72 has a T-shaped structure and is externally fitted with a compression spring 753. The compression spring 753 and the front end of the self-locking rod 72 are set in a telescopic groove 711 inside the threaded rod 71. When the self-locking button 9 of the second handle 73 is pressed, the self-locking rod 72 retracts into the telescopic groove 711, and the locking plate 751 closes. After the button is released, the spring 753 pushes the self-locking rod 72 to extend, and the locking plate 751 unfolds and presses against the back of the first locking block 5 to form a mechanical self-lock.

[0036] Closing and locking process: Start hydraulic cylinder 42, hydraulic rod 43 retracts and drives connecting plate 441 to move upward. Left and right connecting rods 442 and 443 push left clamp 2 and right clamp 3 to close towards the center until they completely hug the outer edge of cover plate 1. Rotate first handle 742 to drive locking seat 741 to move axially along threaded rod 71, press the side of second locking block 6, eliminate the assembly gap between cover plate 1 and flange, release self-locking button 9 of second handle 73, compress spring 753 to push self-locking rod 72 forward, its T-shaped end forces clamp plate 751 to expand outward and lock into the groove on the back of first locking block 5, forming a pressure-resistant mechanical self-lock.

[0037] Unlocking process: Press the self-locking button 9, the self-locking rod 72 retracts and drives the clamping plate 751 to disengage from the first locking block 5, releasing the mechanical lock. Rotate the first handle 742 in the opposite direction to disengage the locking seat 741 from the second locking block 6. The hydraulic cylinder 42 drives the hydraulic rod 43 to extend, and the transmission component 44 pulls the left and right clamps 2 and 3 outward. The cover plate 1 disengages from the flange end face along with the sealing ring 101, completing the quick opening.

[0038] The embodiments described above are merely preferred embodiments of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications, improvements, and substitutions without departing from the inventive concept, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A safety self-locking quick-opening blind flange, comprising a cover plate (1), a left clamp (2), a right clamp (3), a fixing mechanism (4), and a self-locking mechanism (7), characterized in that: The inner wall of the cover plate (1) is provided with a sealing ring (101), and the outside is fixed by a left clamp (2) and a right clamp (3). The top of the left clamp (2) and the right clamp (3) are connected to a fixing mechanism (4). The fixing mechanism (4) includes a fixing box (41) set on the top of the left and right clamps, a hydraulic cylinder (42) set on the top of the fixing box (41), a hydraulic rod (43) set in the fixing box (41), and a transmission assembly (44) connected to the hydraulic rod (43). The left clamp (2) has a first locking block (5) fixedly provided on one side surface, and the first locking block (5) has a threaded groove (8) through the center. The cover plate (1) is provided with a second locking block (6) on one side surface adjacent to the left clamp (2), and the center of the second locking block (6) is also provided with a threaded groove (8). The threaded grooves (8) at the center of the first locking block (5) and the second locking block (6) are parallel and interconnected, and the two threaded grooves (8) are connected and fixed by a self-locking mechanism (7).

2. The safety self-locking quick-opening blind flange as described in claim 1, characterized in that: When the cover plate (1) is closed with the left and right clamps, the surfaces of the first locking block (5) and the second locking block (6) are in contact.

3. A safety self-locking quick-opening blind flange as described in claim 1, characterized in that: The top of the left clamp (2) and the right clamp (3) are located inside the fixed box (41), and are closed or opened inside the fixed box (41) through the transmission assembly (44).

4. A safety self-locking quick-opening blind flange as described in claim 1, characterized in that: The transmission assembly (44) includes a connecting plate (441), a left connecting rod (442), and a right connecting rod (443). The top of the connecting plate (441) is fixedly connected to the end of the hydraulic rod (43). The connecting plate (441) contains one end of the left connecting rod (442) and the right connecting rod (443), which are connected by a pin. The other end of the left connecting rod (442) and the right connecting rod (443) is connected to the top of the left clamp (2) and the right clamp (3) by a pin.

5. A safety self-locking quick-opening blind flange as described in claim 1, characterized in that: The self-locking mechanism (7) includes a threaded rod (71), a self-locking rod (72), a second handle (73), a clamping assembly (74), and a self-locking assembly (75). The threaded rod (71) is threadedly connected to the threaded groove (8) on the surface of the first locking block (5) and the second locking block (6). The clamping assembly (74) is sleeved on the surface of the threaded rod (71). The clamping assembly (74) fixes the surface of the second locking block (6) through a threaded connection. The self-locking rod (72) is provided in the center of the threaded rod (71). One end of the threaded rod (71) is connected to the second handle (73). The other end of the threaded rod (71) has no threads and is provided with a self-locking assembly (75) which is connected to the front end of the self-locking rod (72).

6. A safety self-locking quick-opening blind flange as described in claim 5, characterized in that: The clamping assembly (74) includes a locking seat (741) and a first handle (742). The locking seat (741) is sleeved on the outside of the threaded rod (71) and threadedly connected thereto. The first handle (742) is vertically fixed on its surface. By rotating the first handle (742), the locking seat (741) is tightly fitted with the second locking block (6).

7. A safety self-locking quick-opening blind flange as described in claim 5, characterized in that: The self-locking assembly (75) includes a locking plate (751), a locking plate groove (752), and a compression spring (753). The front end surface of the threaded rod (71) is symmetrically provided with locking plate grooves (752). The locking plate (751) is fixed in the locking plate groove (752) by a pin. One end of the locking plate (751) is engaged in the symmetrically provided grooves (721) on the front end surface of the self-locking rod (72). The front end of the self-locking rod (72) has a T-shaped structure and is externally fitted with a compression spring (753). The compression spring (753) and the front end of the self-locking rod (72) are located in the telescopic groove (711) provided inside the threaded rod (71).

8. A safety self-locking quick-opening blind flange as described in claim 5 or 7, characterized in that: The second handle (73) is provided with a self-locking button (9) at the center. The self-locking button (9) is connected to the end of the self-locking rod (72). By pulling the self-locking button (9), the locking plate (751) automatically tilts against the back of the first locking block (5) under the action of the groove (721) to complete the self-locking. Then, by pressing down the self-locking button (9), the self-locking rod (72) extends and retracts into the telescopic groove (711) under the action of the compression spring (753), and the locking plate (751) completes the closing.

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