Sealing flange for negative pressure device

Abstract

The utility model discloses a sealing flange for a negative pressure device. The sealing flange aims to solve the problems that when an existing sealing flange is installed, due to the fact that bolts are tightened one by one, time and labor are consumed, personnel are prone to fatigue, and efficiency is low. According to the sealing flange, a first flange body and a second flange body with fixing holes are connected through a bolt and nut structure, the first flange body is provided with a bolt screwing mechanism, comprises a bolt clamping assembly corresponding to the fixing holes and a driving piece, and can synchronously drive bolts to rotate and axially move so as to be connected with nuts. A clamping sleeve of the bolt clamping assembly can rotate in a sliding groove and is provided with a limiting groove matched with a bolt head, and a gear is arranged on the outer side and controlled by a driving piece. A locking assembly is further arranged to prevent the bolt from being disengaged. The second flange body is provided with a nut fixing mechanism which is composed of a detachable fixing disc with a fixing groove. Compared with the prior art, the scheme has the advantages that the mounting efficiency is greatly improved, the bolt tightening consistency, stability and safety are ensured, the mounting process is optimized, and stable and reliable operation of the negative pressure device is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of sealing flange, especially a sealing flange for negative pressure device. BACKGROUND

[0002] In modern industrial production, scientific research and medical and many other fields, the negative pressure device plays a vital role. For example, in the vacuum distillation, vacuum drying process of chemical industry, semiconductor manufacturing of electronic industry, negative pressure suction system of medical field and ventilation system of biological safety laboratory, etc. all rely on negative pressure device to realize specific process or function. In the negative pressure device, the sealing flange is the key part of connecting each component and pipeline in the negative pressure device, and its performance directly affects whether the negative pressure device can operate stably and reliably.

[0003] The existing sealing flange mainly includes a pair of flange bodies matched with each other and a plurality of bolt holes provided on the flange bodies. When fixing and installing the flange, the sealing surfaces of the two flange bodies are first matched with each other, and then the bolts are passed through the bolt holes one by one, and the nuts are rotated and fixed.

[0004] However, in the actual installation process, according to the sealing requirements and the uniform stress principle, the bolts need to be rotated and tightened one by one in a specific order. For example, in the common industrial pipeline connection sealing flange, there are four or five bolts, or dozens of bolts. The installer needs to hold a wrench or operate an electric tool to tighten each bolt in turn. This not only consumes a lot of time, but also makes the installer tired after a long time of repeated action, further reducing the work efficiency. UTILITY MODEL CONTENTS

[0005] The main purpose of the utility model is to provide a sealing flange for negative pressure device, which aims to solve the problem that the sealing flange of the existing negative pressure device needs to be rotated and tightened one by one in the installation process due to the large number of bolts, resulting in time-consuming and labor-intensive installation, easy fatigue of the installer and low work efficiency.

[0006] To achieve the above purpose, the utility model provides a sealing flange for negative pressure device, which includes a first flange body and a second flange body with a plurality of fixing holes, the first flange body and the second flange body are fixedly connected through a plurality of bolt and nut structures, the bolt and nut structure includes a fastening bolt passing through the fixing hole and a fastening nut threadedly connected with the end of the fastening bolt, the first flange body is provided with a bolt tightening mechanism, and the second flange body is provided with a nut fixing mechanism, the bolt tightening mechanism is used for clamping a plurality of bolts and synchronously driving a plurality of bolts to rotate and move axially to the nut direction to realize the thread connection with the nut.

[0007] In a possible implementation, the screwing mechanism comprises bolt clamping assemblies arranged on the first flange body and corresponding to the positions of the fixing holes, the bolt clamping assemblies are rotationally arranged on the first flange body and axially slidable relative to the first flange body; and the screwing mechanism further comprises a driving member for driving the bolt clamping assemblies to move synchronously.

[0008] In a possible implementation, the first flange body is provided with sliding grooves located at the sides of the fixing holes, the bolt clamping assemblies comprise clamping sleeves slidingly arranged in the sliding grooves, the clamping sleeves are rotatable relative to the sliding grooves, and one end of each clamping sleeve away from the second flange body is provided with a limiting groove matched with the head of the bolt; and the screwing mechanism further comprises gears fixedly arranged on the circumferential outer sides of the clamping sleeves, and the driving member can simultaneously control the gears to rotate synchronously so as to drive the clamping sleeves to rotate and axially slide relative to the nut.

[0009] In a possible implementation, the clamping sleeve is provided with a locking assembly at the opening of the limiting groove, and the locking assembly is used to limit the bolt from being separated from the limiting groove.

[0010] In a possible implementation, the locking assembly comprises a connecting rod arranged at the opening of the limiting groove, a locking plate slidingly arranged on the connecting rod, and the locking plate is rotatable relative to the connecting rod; and the screwing mechanism further comprises an abutting spring sleeved on the connecting rod, and the abutting spring is used to apply a pressing force to the locking plate towards the bolt.

[0011] In a possible implementation, the driving member comprises a control ring threadedly connected to the side of the first flange body, the control ring is provided with a gear ring engaged with the gears; and the screwing mechanism further comprises limiting rings symmetrically arranged on both sides of the gear ring, and the limiting gap formed between the limiting rings is used to abut the inner walls of the two sides of the gear.

[0012] In a possible implementation, the nut fixing mechanism comprises a fixing disc detachably arranged on the second flange body, and the side of the fixing disc abutting the second flange body is provided with fixing grooves corresponding to the positions of the fixing holes and matched with the nut in shape and size.

[0013] In summary, the application has the following advantages:

[0014] Compared with the prior art, the screwing mechanism is arranged on the first flange body, and comprises bolt clamping assemblies corresponding to the positions of the fixing holes and a driving member, the bolt clamping assemblies are rotationally arranged on the first flange body and axially slidable relative to the first flange body, and the driving member can drive the bolt clamping assemblies to move synchronously. This structure enables multiple bolts to be synchronously clamped and rotated, greatly improves the installation efficiency, effectively shortens the installation time, and reduces the fatigue of the installation personnel caused by long-time repeated actions.

[0015] Specifically, in the bolt clamping assembly, the clamping sleeve is slidingly arranged in the sliding groove of the first flange body and can rotate, one end away from the second flange body is provided with a limiting groove matched with the bolt head, and a gear is fixed outside. The synchronous rotation of the gear is controlled by the driving member to realize the bolt tightening and axial movement. This design precisely realizes the synchronous operation of multiple bolts, ensures the consistency of the bolt tightening process, overcomes the problem of dispersed bolt tightening operation and difficulty in ensuring uniformity in the prior art, and further improves the stability and reliability of the sealing flange installation.

[0016] The locking assembly arranged on the clamping sleeve includes a connecting rod, a lock plate that can slide and rotate, and an abutting spring, which can effectively limit the bolt from being separated from the limiting groove. Compared with the prior art, the locking assembly further ensures the safety and stability of the installation process and avoids the influence of accidental bolt falling on the installation.

[0017] The driving member is a control ring that is screw-connected to the periphery of the first flange body, the tooth ring on the control ring is engaged with the gear, and the limiting gap formed by the limiting rings on both sides is in abutment with the inner walls on both sides of the gear. This ingenious structure realizes accurate control of the bolt clamping assembly, compared with the prior art, the control ring ensures the synchronization and uniformity of the tightening action of multiple bolts, and improves the installation quality of the sealing flange.

[0018] In addition, the nut fixing mechanism arranged on the second flange body includes a detachable fixing disc, and the disc is provided with a fixing groove matched with the nut. Compared with the prior art, the nut positioning and installation are facilitated, the installation process is further optimized, the overall installation efficiency and convenience are improved, the stable connection of the sealing flange of the negative pressure device is ensured, and the stable and reliable operation of the negative pressure device is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained according to the structures shown in these drawings without creative labor for those skilled in the art.

[0020] Figure 1 It is a perspective view of the present application;

[0021] Figure 2 It is a partial sectional view of the present application;

[0022] Figure 3 It is a structural schematic view of the bolt tightening mechanism of the present application;

[0023] Figure 4 The exploded view of the bolt screwing mechanism of the utility model;

[0024] Figure 5 The structural view of the bolt clamping assembly of the utility model;

[0025] Figure 6 The Figure 4 The enlarged view of the tooth ring structure at A;

[0026] Figure 7 The exploded structural view of the second flange body of the utility model.

[0027] Explanation of the reference signs:

[0028] 1, first flange body; 2, second flange body; 3, rubber sealing ring; 4, bolt screwing mechanism; 41, bolt clamping assembly; 410, clamping sleeve; 411, limiting groove; 412, gear; 42, driving piece; 420, control ring; 421, tooth ring; 422, limiting ring; 423, limiting gap; 5, nut fixing mechanism; 51, fixing disc; 52, fixing groove; 53, screw; 6, sliding groove; 7, locking assembly; 71, connecting rod; 72, locking plate; 73, abutting spring; 8, fastening bolt; 9, fastening nut.

[0029] The realization, functional features and advantages of the utility model will be further explained by combining with the embodiments and referring to the drawings. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the application more clear and explicit, the application will be further explained in detail by combining with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application and not to limit the application.

[0031] As Figures 1-7 shown, the embodiment proposes a sealing flange for a negative pressure device, which comprises a first flange body 1 and a second flange body 2 with a plurality of fixing holes, and the first flange body 1 and the second flange body 2 are respectively arranged at the connecting part between the negative pressure device and the pipeline; for example, the first flange body 1 and the second flange body 2 are respectively arranged at one end of two negative pressure pipelines, and through this flange, the connection between the two negative pressure pipelines can be realized; and the first flange body 1 and the second flange body 2 are both provided with mutually adhering sealing surfaces, and annular sealing grooves are formed on the two sealing surfaces, and rubber sealing rings 3 are embedded in the sealing grooves, as Figure 1 shown, when the rubber sealing rings 3 are mutually fixed between the first flange body 1 and the second flange body 2, the sealing effect of the two flange connecting parts is improved, so as to prevent negative pressure leakage and ensure the stability of the pressure inside the negative pressure device and maintain its normal operation.

[0032] And the first flange body 1 and the second flange body 2 are fixedly connected through a plurality of bolt nut structures, the bolt nut structure includes a fastening bolt 8 passing through the fixed hole and a fastening nut 9 threadedly connected with the end of the fastening bolt 8, and the fastening bolt 8 and the fastening nut 9 are both prior art, so they will not be described in detail in the application.

[0033] And as Figures 1-2 shown, the first flange body 1 is provided with a bolt tightening mechanism 4, and the second flange body 2 is provided with a nut fixing mechanism 5, the bolt tightening mechanism 4 is used for clamping a plurality of bolts and synchronously driving the plurality of bolts to rotate and axially move to the nut direction to realize the threaded connection with the nut.

[0034] Among them, as Figure 3 shown, the bolt tightening mechanism 4 includes a bolt clamping assembly 41 arranged on the first flange body 1 and corresponding to the position of the plurality of fixed holes, the bolt clamping assembly 41 is rotationally arranged on the first flange body 1 and can axially slide relative to the first flange body 1; it also includes a driving member 42 for driving the plurality of bolt clamping assemblies 41 to move synchronously.

[0035] Specifically, as Figures 4-5 shown, the first flange body 1 is provided with a plurality of sliding grooves 6 located on the side of the fixed hole, the bolt clamping assembly 41 includes a clamping sleeve 410 slidingly arranged in the sliding groove 6, the clamping sleeve 410 can rotate relative to the sliding groove 6, and the end of the clamping sleeve 410 away from the second flange body 2 is provided with a limiting groove 411 matched with the head of the bolt; it also includes a gear 412 fixedly arranged on the circumferential outer side of the clamping sleeve 410, and the driving member 42 can simultaneously control a plurality of gears 412 to rotate synchronously to drive the clamping sleeve 410 to rotate and axially slide relative to the nut.

[0036] The first flange body 1 is provided with a plurality of sliding grooves 6 located on the side of the fixed hole, the clamping sleeve 410 in the bolt clamping assembly 41 is slidingly arranged in the sliding groove 6, and the clamping sleeve 410 can rotate relative to the sliding groove 6. The end of the clamping sleeve 410 away from the second flange body 2 is provided with a limiting groove 411 matched with the head of the bolt, when the bolt head is placed in the limiting groove 411, the position of the bolt in the subsequent operation can be ensured to be fixed relative to the clamping sleeve 410. In addition, a gear 412 is fixedly arranged on the circumferential outer side of the clamping sleeve 410, and the driving member 42 can drive the clamping sleeve 410 to rotate by simultaneously controlling a plurality of gears 412 to rotate synchronously, so that the bolt can axially slide relative to the nut while rotating, realizing the threaded connection with the nut. Such a structure design enables multiple bolts to be tightened synchronously, compared with the existing technology of tightening the bolts one by one, greatly improving the installation efficiency, effectively shortening the installation time, and avoiding the fatigue of the installation personnel due to long-term repeated single action, thereby ensuring that the installation work can be carried out efficiently and stably.

[0037] As shown in Figure 4 , 6 , the driving member 42 can be a tooth ring 421 engaged with a plurality of gears 412 or a synchronous belt. In this embodiment, the driving member 42 includes a control ring 420 threadedly connected to the periphery of the first flange body 1, the control ring 420 is provided with the tooth ring 421 engaged with the plurality of gears 412; and a pair of limiting rings 422 symmetrically arranged on both sides of the tooth ring 421, and a limiting gap 423 formed between the pair of limiting rings 422 and abutting against the inner walls of both sides of the gear 412.

[0038] Specifically, the driving member 42 is the control ring 420 threadedly connected to the periphery of the first flange body 1, the inner diameter of the control ring 420 is larger than the outer diameter of the first flange body, and the tooth ring 421 engaged with the plurality of gears 412 is arranged on the inner side of the end of the control ring 420 away from the second flange body. Meanwhile, the pair of limiting rings 422 are symmetrically arranged on both sides of the tooth ring 421, and the limiting gap 423 is formed between the pair of limiting rings 422 and abutting against the inner walls of both sides of the gear 412.

[0039] When the control ring 420 is rotated, the rotation of the tooth ring 421 will drive the plurality of gears 412 engaged therewith to rotate synchronously, and at the same time, since the fastening bolt 8 is threadedly connected with the fastening nut 9, in the process of driving the bolt to rotate by the clamping sleeve 410, the fastening bolt 8 will have an axial force relative to the fastening nut 9, so that the fastening bolt 8 can smoothly move away from or approach the fastening nut 9 in the process of rotation.

[0040] Therefore, in this embodiment, the control ring 420 is threadedly connected with the first flange body 1, so that the control ring 420 has a tendency to move axially away from or approach the nut in the process of driving the tooth ring 421 to rotate, and the axial movement of the control ring 420 is transmitted to the gear 412 through the limiting gap 423 arranged on both sides of the tooth ring 421, and then the fastening bolt 8 will have a force away from or approaching the nut relative to the nut in the process of rotation by the clamping sleeve 410.

[0041] Specifically, since the edge of the gear 412 is clamped in the limiting gap 423, in the process of axial movement of the tooth ring 421, the inner walls on both sides of the limiting gap 423 will abut against the gear 412 to drive the gear 412 to move to one end; and then the control ring 420 can drive the fastening bolt 8 to rotate through the gear 412 and the clamping sleeve 410, and at the same time, the fastening bolt 8 has an axial force relative to the fastening nut 9, so that the fastening nut 9 can smoothly move away from or approach the nut. And, the gear 412 and the tooth ring 421 can always be engaged.

[0042] Further, as shown in Figure 5As shown, the clamping sleeve 410 is provided with a locking assembly 7 at the opening of the limiting groove 411, and the locking assembly 7 is used to limit the bolt from being separated from the limiting groove 411. The locking assembly 7 includes a connecting rod 71 arranged at the opening of the limiting groove 411, a locking plate 72 is slidingly arranged on the connecting rod 71, and the locking plate 72 can rotate relative to the connecting rod 71; further comprising an abutting spring 73 sleeved on the connecting rod 71, the abutting spring 73 is used to exert a extrusion force on the locking plate 72 to the bolt.

[0043] Specifically, when preparing to install the bolt, first align the bolt head with the limiting groove 411 of the clamping sleeve 410 away from one end of the second flange body 2 and put it in. Since the locking plate 72 is slidingly arranged on the connecting rod 71 at the opening of the limiting groove 411 and can rotate relative to it, during the process of putting in the bolt, the locking plate 72 is pushed away from the opening of the limiting groove 411. Thus, space is left for the bolt head to enter the limiting groove 411. When the bolt head is completely in the limiting groove 411, the user pushes the locking plate 72 back to the opening. At this time, the abutting spring 73 sleeved on the connecting rod 71 exerts an extrusion force on the locking plate 72 to the bolt, so that the locking plate 72 tightly abuts against the bolt. In this way, during the entire process of subsequent rotation of the bolt by the driving member 42 and axial movement towards the nut, the bolt is firmly limited in the limiting groove 411 and cannot be separated from it regardless of any external force or vibration.

[0044] Through such a working process, the locking assembly 7 achieves an important effect and role. It effectively avoids the risk of the bolt being separated from the limiting groove 411 due to accidental situations such as vibration, collision, etc. during the bolt tightening operation, greatly improving the safety and stability of the installation process.

[0045] And as shown, Figure 6 The nut fixing mechanism 5 includes a fixing disc 51 detachably arranged on the second flange body 2, and the side of the fixing disc 51 abutting the second flange body is provided with a fixing groove 52 corresponding to the position of the fixing hole and matching the shape and size of the nut.

[0046] Specifically, the connecting structure between the fixing disc 51 and the second flange body 2 can adopt clamping or screw 53 connection, so that the nut can be fixed at the fixing hole and abut between the second flange body 2; in this embodiment, the connecting structure between the fixing disc 51 and the second flange body 2 adopts screw 53 connection, wherein a threaded hole is provided on the side of the fixing disc 51, when the user places the fastening nut 9 in the fixing groove 52 and fixes the position between the second flange body 2, the screw 53 is passed through the threaded hole, and then abuts with the side wall of the second flange body 2, and the position of the fixing disc 51 is locked through friction.

[0047] During the installation process, the nut is pre-placed in the fixing groove 52, and the nut is accurately positioned at the corresponding position, waiting for threaded connection with the bolt passing through the fixing hole of the first flange body 1. Compared with the manual positioning of the nut in the prior art, this structure greatly facilitates the positioning and installation of the nut, further optimizes the overall installation process, and improves the convenience and efficiency of installation.

[0048] During the installation process of the negative pressure device, the efficient installation process can reduce the installation time, reduce the influence of environmental factors on the internal components of the negative pressure device due to the long installation time, and improve the installation accuracy, ensuring the stable installation of the sealing flange and providing protection for the stable operation of the negative pressure device.

[0049] The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present application, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation of the present patent, for those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0050] The above is only the preferred embodiment of the present application, and does not limit the present application, any modification, equivalent replacement and improvement made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A sealing flange for a negative pressure device, comprising a first flange body (1) and a second flange body (2) with a plurality of fixing holes, the first flange body (1) and the second flange body (2) being fixedly connected through a plurality of bolt-nut structures, the bolt-nut structure comprising a fastening bolt (8) passing through the fixing hole and a fastening nut (9) threadedly connected with the end of the fastening bolt (8), characterized in that, The first flange body (1) is provided with a bolt screwing mechanism (4), and the second flange body (2) is provided with a nut fixing mechanism (5), the bolt screwing mechanism (4) is used for clamping a plurality of bolts and synchronously driving the plurality of bolts to rotate and axially move to the nut direction to realize the threaded connection with the nut.

2. A sealing flange for a negative pressure device according to claim 1, characterized in that The bolt screwing mechanism (4) comprises bolt clamping assemblies (41) provided on the first flange body (1) and corresponding to the positions of the fixing holes, the bolt clamping assemblies (41) are rotationally arranged on the first flange body (1) and can axially slide relative to the first flange body (1); and the bolt screwing mechanism (4) further comprises a driving member (42) for driving the plurality of bolt clamping assemblies (41) to synchronously move.

3. A sealing flange for a negative pressure device according to claim 2, characterized in that The first flange body (1) is provided with a plurality of sliding grooves (6) located at the circumferential side of the fixing holes, the bolt clamping assembly (41) comprises a clamping sleeve (410) slidingly arranged in the sliding groove (6), the clamping sleeve (410) can rotate relative to the sliding groove (6), and one end of the clamping sleeve (410) away from the second flange body (2) is provided with a limiting groove (411) matched with the head of the bolt; and the bolt screwing mechanism (4) further comprises a gear (412) fixedly arranged on the circumferential outer side of the clamping sleeve (410), the driving member (42) can simultaneously control a plurality of gears (412) to synchronously rotate to drive the clamping sleeve (410) to rotate and axially slide relative to the nut.

4. A sealing flange for a negative pressure device according to claim 3, characterized in that The clamping sleeve (410) is provided with a locking assembly (7) relative to the opening of the limiting groove (411), and the locking assembly (7) is used for limiting the bolt from being separated from the limiting groove (411).

5. A sealing flange for a negative pressure device according to claim 4, characterized in that The locking assembly (7) comprises a connecting rod (71) arranged at the opening of the limiting groove (411), a locking plate (72) is slidingly arranged on the connecting rod (71), and the locking plate (72) can rotate relative to the connecting rod (71); and the locking assembly (7) further comprises an abutting spring (73) sleeved on the connecting rod (71), and the abutting spring (73) is used for exerting a pressing force on the locking plate (72) to the bolt.

6. A sealing flange for a negative pressure device according to claim 3, wherein, The driving member (42) comprises a control ring (420) threadedly connected to the circumferential side of the first flange body (1), the control ring (420) is provided with a gear ring (421) engaged with the plurality of gears (412); and the driving member (42) further comprises a pair of limiting rings (422) symmetrically arranged on both sides of the gear ring (421), and a limiting gap (423) is formed between the pair of limiting rings (422), and the inner wall of the limiting gap (423) abuts against the inner wall of the gear (412) on both sides.

7. A sealing flange for a negative pressure device according to any one of claims 1-6, characterized in that, The nut fixing mechanism (5) comprises a fixing disc (51) detachably arranged on the second flange body (2), and the side of the fixing disc (51) abutting against the second flange body is provided with a fixing groove (52) corresponding to the positions of the fixing holes and matching in shape and size with the nut.

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