A foreign matter blocking structure for a venturi

Abstract

The application discloses a foreign matter plugging structure for a Venturi tube, which comprises a plugging assembly embedded in the interior of the Venturi tube, wherein the plugging assembly comprises a sealing layer capable of interference fit with the inner wall of the Venturi tube; and a connecting assembly fixedly connected with the plugging assembly, the connecting assembly being capable of fixed fit with the Venturi tube and limiting the relative position of the plugging assembly in the Venturi tube. The plugging assembly and the connecting assembly are used to effectively plug the interior of the Venturi tube and accurately position the plugging area, thereby solving the problems of unreliable sealing and difficult positioning of the conventional temporary shielding mode and having the advantages of simple installation, reliable sealing and strong adaptability.

Description

Technical Field

[0001] This application relates to the field of Venturi tube maintenance equipment technology, and in particular to a foreign object sealing structure for Venturi tubes. Background Technology

[0002] Venturi tubes are used as important fluid measurement components in the conventional island of nuclear power plants and similar industrial facilities. During use, the throat area of ​​the venturi tube is at risk of corrosion and perforation, requiring maintenance and replacement. However, during replacement operations, because the venturi tube and its upstream and downstream connections are large-diameter, thick-walled pipes, cutting and grinding operations are required. The iron filings and dust generated during this process can easily enter the pipeline system under the influence of gravity and negative pressure disturbances, causing wear on upstream and downstream equipment and leading to new problems. Utility Model Content

[0003] In view of this, the purpose of this application is to provide a foreign object plugging structure suitable for venturi tubes, so as to reduce the risk of foreign objects entering the system during the maintenance and replacement of venturi tubes.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] A foreign object sealing structure for a venturi tube includes:

[0006] A sealing assembly is embedded inside the venturi tube, and the sealing assembly includes a sealing layer capable of interference fit with the inner wall of the venturi tube;

[0007] A connecting component is fixedly connected to the sealing component, and the connecting component can be fixedly engaged with the venturi tube and restrict the relative position of the sealing component within the venturi tube.

[0008] Preferably, in the above-mentioned foreign object sealing structure for a venturi tube, the sealing assembly includes two spaced-apart support layers, the support layers being in clearance fit with the inner wall of the venturi tube; the sealing layer is sandwiched between the two support layers and fixed to the support layers by a number of bolts.

[0009] Preferably, in the above-mentioned foreign matter sealing structure for venturi tubes, both the support layer and the sealing layer are circular structures and are concentrically fixed.

[0010] Preferably, in the above-mentioned foreign matter sealing structure for a venturi tube, the gap between the outer diameter of the support layer and the inner diameter of the venturi tube is 20mm-30mm; the difference between the outer diameter of the sealing layer and the inner diameter of the venturi tube is 8mm-12mm.

[0011] Preferably, in the above-mentioned foreign object sealing structure for venturi tubes, the sealing layer is made of rubber and the support layer is made of metal.

[0012] Preferably, in the above-described foreign object sealing structure for a venturi tube, the connecting assembly includes a clamp that is bent and hooked to the end edge of the venturi tube.

[0013] Preferably, in the above-described foreign object sealing structure for a venturi tube, one end of a plurality of the clamps is fixedly disposed on the same side of the sealing assembly, and at least three sets of the clamps are evenly disposed along the circumference of the sealing assembly.

[0014] Preferably, in the above-mentioned foreign object sealing structure for venturi tubes, the gripper is a strip-shaped metal product, and the gripper is manually bent in its length direction to form a bent portion for hooking.

[0015] Preferably, in the above-described foreign object sealing structure for a venturi tube, the length of the gripper is 18cm-25cm.

[0016] Preferably, in the above-described foreign object sealing structure for a venturi tube, a heat insulation pad is fitted on the outer wall of the end of the gripper away from the sealing assembly.

[0017] As can be seen from the above technical solution, the foreign object plugging structure for a venturi tube provided in this disclosure includes a plugging component and a connecting component. The plugging component includes a sealing layer to seal one side of the venturi tube through an interference fit, thereby isolating debris from the cutting and grinding process. At the same time, the connecting component is provided to realize the installation of the foreign object plugging structure on the venturi tube. The installation position of the plugging component on the venturi tube is restricted by fixing it to the venturi tube, thereby achieving effective plugging and accurate positioning of the inside of the venturi tube. This solves the problems of unreliable sealing and difficult positioning of traditional temporary shielding methods, and has the advantages of simple installation, reliable sealing, and strong adaptability. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application 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 only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of a foreign matter sealing structure suitable for a venturi tube provided in an embodiment of this disclosure;

[0020] Figure 2 This is a side view of the sealing component;

[0021] Figure 3 This is a schematic diagram of the assembly of the foreign object sealing structure inside the venturi tube.

[0022] in:

[0023] 10-Sealing assembly; 110-Sealing layer; 120-Supporting layer; 20-Connecting assembly; 210-Clamping jaw; 220-Bend; 30-Venturi tube. Detailed Implementation

[0024] The core of this application is to disclose a foreign object sealing structure suitable for venturi tubes, so as to reduce the risk of foreign objects entering the system during the maintenance and replacement of venturi tubes.

[0025] To enable those skilled in the art to better understand the present application, embodiments of the present application will be described below with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the utility model described in the claims. Additionally, the complete content of the structures represented in the following embodiments is not limited to those necessary for the solution of the utility model described in the claims.

[0026] like Figure 1 , Figure 2 and Figure 3 As shown, this disclosure provides a foreign object sealing structure for a venturi tube. Specifically, the foreign object sealing structure includes a sealing component 10 and a connecting component 20. The sealing component 10 is embedded inside the venturi tube 30 to seal and block one side opening of the venturi tube 30. Specifically, the sealing component 10 includes a sealing layer 110 that can be interference-fitted with the inner wall of the venturi tube 30. The sealing layer 110 can be made of rubber, and the interference fit achieves tight contact with the inner wall of the venturi tube 30, thereby effectively preventing foreign objects from entering the pipeline system. The sealing layer 110 is preferably circular in shape.

[0027] The connecting component 20 can be fixedly fitted with the venturi tube 30, so that the foreign object sealing structure can be stably set on the venturi tube 30, and the relative position of the sealing component 10 inside the venturi tube 30 is restricted. This avoids the problem of the sealing component 10 being set too shallow, resulting in poor sealing effect, or the sealing component 10 being set too deep, making it difficult to remove from inside the venturi tube 30. The above structure, through the cooperation of the sealing component 10 and the connecting component 20, can effectively prevent foreign objects such as iron filings and dust from entering the pipeline system during the cutting and grinding operation of the venturi tube 30. The interference fit design of the sealing layer 110 ensures the reliability of the sealing, while the fixing structure of the connecting component 20 ensures the stable positioning of the sealing component 10 in the pipeline. Compared with the prior art, the above structure has the characteristics of simple installation and reliable sealing effect, which can significantly reduce the workload of system purging or flushing, and avoid the adverse effects of foreign objects on system operation.

[0028] Furthermore, in some embodiments of this disclosure, the sealing assembly 10 has a three-layer structure along its thickness direction. Specifically, the sealing assembly 10 includes two spaced-apart support layers 120, and a sealing layer 110 is sandwiched between the two support layers 120 and fixed to the support layers 120 by several bolts. Unlike the sealing layer 110, the support layer 120 has a clearance fit with the inner wall of the Venturi tube 30. It should be noted that the support layer 120 is made of metal, specifically a ring-shaped steel plate or a stainless steel ring, and the outer diameter accuracy is ensured by machining. When the sealing layer 110 and the Venturi tube 30 are in an interference fit, the support layers 120 on both sides keep the foreign object sealing structure stable, thus ensuring its sealing effect on the Venturi tube 30.

[0029] It should be further noted that in some embodiments of this disclosure, the support layer 120 and the sealing layer 110 adopt a concentric circle structure design and are coaxially positioned through pre-drilled bolt holes, forming a stable sandwich structure after the bolts are tightened. The concentric structure of the support layer 120 and the sealing layer 110 ensures that the sealing assembly 10 is subjected to uniform circumferential force within the venturi tube 30, avoiding unilateral wear caused by eccentricity of the foreign object sealing structure, and preventing sealing failure caused by local stress concentration, thereby improving the sealing reliability and service life of the sealing assembly 10 under complex fluid conditions.

[0030] Furthermore, in some embodiments of this disclosure, the gap between the outer diameter of the support layer 120 and the inner diameter of the venturi tube 30 is 20mm-30mm, while the difference between the outer diameter of the sealing layer 110 and the inner diameter of the venturi tube 30 is 8mm-12mm. Specifically, the gap between the outer diameter of the support layer 120 and the inner wall of the venturi tube 30 is set to a range of 20mm to 30mm to allow the support layer 120 to remain stably aligned within the pipe, while enabling smooth movement along the length of the venturi tube 30, and allowing for assembly tolerances and thermal expansion allowances during processing. The difference between the outer diameter of the sealing layer 110 and the inner diameter of the venturi tube 30 is controlled between 8mm and 12mm to ensure that the sealing layer 110 can generate sufficient radial compression to achieve effective sealing, and that the position of the sealing layer 110 within the venturi tube 30 is not difficult to adjust due to excessive radial dimensional differences. In a preferred embodiment of this disclosure, the support layer 120 may be a metal circular plate structure, with its outer diameter and the gap between the inner diameter of the venturi tube 30 set to 25 mm; while the sealing layer 110 is made of rubber, with its outer diameter designed to be 10 mm larger than the inner diameter of the venturi tube 30, so that it forms uniform compression deformation after installation, in order to meet the sealing and position adjustment requirements of the foreign object blocking structure inside the venturi tube 30.

[0031] It should be noted that by precisely controlling the gap fit between the support layer 120 and the inner wall of the pipe and the interference of the sealing layer 110, the positioning stability of the sealing component 10 in the pipe is ensured, and the sealing layer 110 can fully fit the inner wall of the pipe to form an effective seal. It is particularly suitable for large-diameter pipe systems with negative pressure conditions, and can effectively prevent iron filings and dust generated by cutting and grinding operations from entering the downstream of the pipe through the gap.

[0032] Furthermore, it should be noted that in the embodiments disclosed herein, the sealing layer 110 may be made of rubber, and the support layer 120 may be made of metal. The rubber sealing layer 110 can achieve an interference fit with the inner wall of the venturi tube 30 to ensure a sealing effect; the rubber material may be nitrile rubber or fluororubber. The metal support layer 120 provides the necessary structural strength, such as stainless steel or carbon steel, to meet strength support requirements.

[0033] Furthermore, in the foreign object sealing structure of the venturi tube provided in this embodiment, the connecting component 20 includes a clamp 210, and the clamp 210 is engaged with the end edge of the venturi tube 30 through a bending structure. Specifically, the clamp 210 is a strip-shaped metal product, which can be made of materials with certain elasticity and strength, such as stainless steel or spring steel, so that it can be bent at different positions. The elastic deformation of the clamp 210 enables quick engagement with the end of the pipe, thereby positioning the sealing component 10 in the length direction of the venturi tube 30 and effectively preventing axial displacement of the sealing component 10.

[0034] The cooperation between the clamp 210 and the sealing layer 110 enables the sealing component 10 to be fixed inside the venturi tube 30 and installed in the designed position. At the same time, the connecting component 20 of the clamp 210 structure has a convenient disassembly and assembly process, which is particularly suitable for the temporary sealing needs of large-diameter thick-walled pipes without the need for additional fasteners.

[0035] Based on the above embodiments, one end of several grippers 210 is fixedly disposed on the same side of the sealing component 10, and at least three sets of grippers 210 are evenly disposed along the circumference of the sealing component 10. The evenly distributed grippers 210 can balance the force and avoid deformation or detachment caused by stress concentration on one side. Moreover, the grippers 210 only need to be disposed on one side, and the side of the sealing component 10 facing the inside of the venturi tube 30 does not need to be provided with a gripper 210 structure.

[0036] Furthermore, in some embodiments of this disclosure, the strip-shaped metal gripper 210 is manually bent along its length to form a bent portion 220 for attachment. It should be noted that the width of the strip can be between 10mm and 30mm, and the thickness between 1mm and 3mm, to meet strength and bending requirements. The bent portion 220 is formed by manual bending, and its position can be determined by the operator according to the required placement of the sealing component 10 along the length of the venturi tube 30, thereby meeting the positioning requirements of the sealing component 10 and achieving reliable attachment to the end edge of the venturi tube 30.

[0037] Furthermore, based on the above embodiments, the length of the gripper 210 is 18cm-25cm, which ensures that the gripper 210 forms an effective hook structure after bending, while avoiding installation difficulties due to excessive length or weak hook-up due to excessive shortness. Specifically, the gripper 210 can be bent into a 2cm-3cm end portion 220, thereby meeting the length requirements of the gripper 210. In a specific embodiment of this disclosure, the length of the gripper 210 is 25cm, with a 3cm long end portion forming the bending portion 220, and a 22cm insertion length inside the venturi tube 30 is provided, thus restricting the sealing component 10 to a position 22cm from the end of the venturi tube 30, thereby meeting the sealing distance requirement.

[0038] Furthermore, in some embodiments of this disclosure, a heat insulation pad is fitted on the outer wall of the end of the gripper 210 away from the sealing component 10; the heat insulation pad can be made of high-temperature resistant silicone or ceramic fiber material, with a thickness controlled in the range of 3mm-5mm, and the heat insulation pad can be fixed to the outer surface of the gripper 210 by interference fit or adhesive, with its inner diameter slightly smaller than the outer diameter of the gripper 210 to ensure a tight fit, so that when the foreign object sealing structure needs to be operated during the processing, the end of the gripper 210 has a good heat insulation effect, thereby avoiding burns to the operator.

[0039] The terms "first," "second," "left side," and "right side," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units may not be defined in the listed steps or units, but may include steps or units not listed.

[0040] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A foreign object blocking structure for a venturi, characterized by, include: A sealing assembly is embedded inside the venturi tube, and the sealing assembly includes a sealing layer capable of interference fit with the inner wall of the venturi tube; A connecting component is fixedly connected to the sealing component, and the connecting component can be fixedly engaged with the venturi tube and restrict the relative position of the sealing component within the venturi tube.

2. The foreign object block structure for a venturi according to claim 1, wherein The sealing assembly includes two spaced-apart support layers, which are in clearance fit with the inner wall of the venturi tube; the sealing layer is sandwiched between the two support layers and fixed to the support layers by a number of bolts.

3. The foreign object block structure for a venturi as claimed in claim 2, wherein, Both the support layer and the sealing layer are circular structures and are concentrically fixed.

4. The foreign object block structure for a venturi according to claim 3, wherein The gap between the outer diameter of the support layer and the inner diameter of the venturi tube is 20mm-30mm; the difference between the outer diameter of the sealing layer and the inner diameter of the venturi tube is 8mm-12mm.

5. The foreign object sealing structure for a venturi tube as described in claim 2, characterized in that, The sealing layer is made of rubber, and the support layer is made of metal.

6. The foreign object block-out for a venturi as defined in claim 1, wherein, The connecting assembly includes a gripper that bends and engages with the end edge of the venturi tube.

7. The foreign object occluding structure for a venturi as claimed in claim 6, wherein One end of several of the grippers is fixedly disposed on the same side of the sealing assembly, and at least three sets of grippers are evenly disposed along the circumference of the sealing assembly.

8. The foreign object occlusion structure for a venturi as claimed in claim 6, wherein, The gripper is a strip of metal, and the gripper is manually bent along its length to form a bent portion for hooking.

9. The foreign object occluding structure for a venturi as claimed in claim 8, wherein, The length of the gripper is 18cm-25cm.

10. The foreign object occlusion structure for a venturi as claimed in claim 7, wherein, A heat insulation pad is fitted on the outer wall of the end of the gripper away from the sealing component.

Images