High-pressure flange with plugboard

Abstract

The high-pressure flange comprises a pair of flange connecting pipes, a pair of flange plates, the flange inserting plate, a plurality of connecting bolts and fastening nuts of the connecting bolts, each flange plate is of a U-shaped structure, a center through hole is formed in the center of each flange plate, the inner step face of each flange plate is matched with the outer step face of each flange connecting pipe, and each flange connecting pipe is installed in the corresponding flange plate in a penetrating mode; the flange inserting plate is of an annular structure and arranged between the two flange connecting pipe sealing faces, sealing is arranged between the two end faces of the flange inserting plate and the corresponding flange connecting pipe sealing faces, and the connecting bolt sequentially penetrates through the flange plate on one side, the flange inserting plate and the flange plate on the other side and then is in threaded connection with the fastening nut. And the flange connecting pipe and the flange inserting plate are connected into a sealed whole. Quick connection between ultrahigh-pressure pipelines can be achieved, the two problems of flange leakage and sealing replacement difficulty of the high-pressure pipelines can be effectively solved, universality is high, the application range is wide, manufacturing is easy, and cost is low.

Description

Technical Field

[0001] The utility model belongs to the technical field of high-pressure flanges, and in particular relates to a high-pressure flange with a plug-in plate. Background Art

[0002] High-pressure flanges are very important connectors in hydraulic presses, and they play an important role and value in the connection between pipes. In the past, traditional high-pressure flanges were machined with grooves on the end face of one of the flange pipes, and ordinary O-rings were used to achieve sealing; or, copper gaskets were used between the two flange pipes, and the sealing was achieved through local extrusion deformation of the copper gaskets. However, the traditional flange sealing type has poor reliability, and the flanges can withstand low pressure. During the operation of the equipment, the flange connections often have problems such as running, bubbling, dripping, and leakage, and accidents occur frequently, requiring a lot of time for repair and maintenance; at the same time, after the copper gasket is plastically deformed, it cannot be used again and needs to be re-made, and the normal production of the equipment needs to be interrupted to replace the seal, which is time-consuming and labor-intensive, causing economic losses to the company.

[0003] Therefore, based on these problems, it is urgent to develop a high-pressure flange with simple structure, convenient sealing, disassembly and maintenance, high sealing performance, safety and reliability, and suitable for high-pressure pipeline connection, which has important practical significance. Utility Model Content

[0004] The utility model solves the problems existing in the prior art and provides a high-pressure flange with a plug plate which has a simple structure, convenient sealing, disassembly and maintenance, high sealing performance, safety and reliability and is suitable for high-pressure pipeline connection. It solves the problems of leakage at the high-pressure pipeline flange connection and difficulty in sealing and disassembly, has high versatility, a wide range of applications and is simple to manufacture.

[0005] The utility model is implemented as follows: a high-pressure flange with a plug plate comprises a pair of flange pipes, a pair of flange plates, a flange plug plate, a plurality of connecting bolts and fastening nuts thereof, the flange plate being a concave structure, a central through hole being provided at the center of the flange plate, an inner stepped surface of the flange plate matching an outer stepped surface of the flange pipe, each of the flange pipes being inserted into the central through hole of the corresponding flange plate; the flange plug plate being an annular structure, a plurality of bolt mounting holes 1 being arranged on the flange plate, a plurality of bolt mounting holes 2 being correspondingly arranged on the flange plug plate, the flange plug plate being placed between two flange pipe sealing surfaces, seals being respectively arranged between the two end surfaces of the flange plug plate and the corresponding flange pipe sealing surfaces, the connecting bolts being threadedly connected to the fastening nuts after sequentially passing through the bolt mounting holes of the flange plate on one side, the flange plug plate and the flange plate on the other side, and tightening the fastening nuts to connect the flange pipe and the flange plug plate into a sealed integral body.

[0006] In the above technical solution, preferably, annular grooves are respectively processed on both end surfaces of the flange plug plate near its inner hole, and the seal is placed in the grooves.

[0007] In the above technical solution, it is further preferred that the inner diameter of the groove is the same as the inner diameter of the seal, and the outer diameter of the groove is larger than the outer diameter of the seal.

[0008] In the above technical solution, it is further preferred that the outer diameter of the groove is 1.5 to 2 mm larger than the outer diameter of the seal.

[0009] In the above technical solution, it is further preferred that the seal is a rectangular seal; the height of the seal is 1 to 1.5 mm greater than the depth of the groove.

[0010] In the above technical solution, preferably, the outer diameter of the flange plug plate is the same as the outer diameter of the flange plate.

[0011] In the above technical solution, preferably, the inner diameter of the flange plug plate is the same as the inner diameter of the flange connecting pipe.

[0012] In the above technical solution, preferably, a plane is processed on the circumference of the flange plug plate, and an internal threaded hole for lifting the flange plug plate is provided on the plane.

[0013] In the above technical solution, preferably, the plurality of bolt mounting holes are evenly distributed on the flange.

[0014] The advantages and positive effects of the utility model are:

[0015] 1. The utility model of high-pressure flange with plug-in plate can realize the rapid connection between large-flow ultra-high-pressure pipelines of hydraulic presses. The flange plate, flange pipe and flange plug-in plate are separate parts, which are easy to process and install, and can effectively solve the two major problems of high-pressure pipeline flange leakage and seal replacement difficulties; at the same time, this kind of high-pressure flange has strong versatility, wide application range, simple production and low cost.

[0016] 2. The utility model has a high-pressure flange with a plug plate, and the sealing groove is arranged on a separate flange plug plate. When the seal of the high-pressure flange is replaced, the seal can be replaced without completely disassembling the pipeline and the flange, and the installation is simple and efficient.

[0017] 3. The utility model high pressure flange with plug-in plate adopts rectangular seal, the contact area between the rectangular seal and the flange pipe end face is large, the sealing effect is good, and at the same time, the seal has a long service life and stable sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The technical solutions of the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings, but it should be noted that these drawings are designed only for explanation purposes and are not intended to limit the scope of the present application. In addition, unless otherwise specified, these drawings are intended only to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.

[0019] Figure 1 This is a schematic diagram of the installation of a high-pressure flange with a plug plate of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the flange plug plate of the utility model;

[0021] Figure 3 It is a front view of the flange plug plate of the present utility model.

[0022] In the figure: 1. Flange pipe; 2. Flange plate; 2-1. Bolt mounting hole 1; 3. Seal; 4. Flange plate; 4-1. Groove; 4-2. Bolt mounting hole 2; 4-3. Internal threaded hole; 5. Connecting bolt; 6. Fastening nut. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0024] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "one", "two", "three", "four", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connection", "connection", "installation" and "fitting" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] See also Figure 1 to Figure 3The embodiment of the utility model provides a high-pressure flange with a plug plate, including a pair of flange pipes, a pair of flange plates, a flange plug plate, a plurality of connecting bolts and fastening nuts thereof. The flange plate is a concave structure, a central through hole is provided in the center of the flange plate, the inner step surface of the flange plate matches the outer step surface of the flange pipe, and each of the flange pipes is installed in the central through hole of the corresponding flange plate; the flange plug plate is an annular structure, a plurality of bolt mounting holes 1 are arranged on the flange plate, and a plurality of bolt mounting holes 2 are arranged correspondingly on the flange plug plate, the flange plug plate is placed between the sealing surfaces of the two flange pipes, and seals are respectively provided between the two end surfaces of the flange plug plate and the corresponding flange pipe sealing surfaces; the connecting bolts preferably adopt hexagonal bolts, which are sequentially passed through the bolt mounting holes of the flange plate on one side, the flange plug plate, and the other side of the flange plate, and then threadedly connected with the fastening nut, and the fastening nut is tightened to connect the flange pipe and the flange plug plate into a sealed whole.

[0027] As a preferred embodiment, annular grooves are respectively processed on both end faces of the flange plug plate near its inner hole, and the seal is placed in the groove. The sealing grooves are processed on both end faces of the flange plug plate. When the seal is aged or damaged during the use of the high-pressure flange, the replacement of the seal only requires the flange plug plate to be pulled out separately without disassembling the flange. The flange seal replacement is simple and convenient, which can effectively solve the two major problems of high-pressure pipeline flange leakage and seal replacement difficulties.

[0028] As a preferred embodiment, the inner diameter of the groove is the same as the inner diameter of the seal, and the outer diameter of the groove is larger than the outer diameter of the seal, which is convenient for seal installation and has a shrinkage space after the seal is squeezed. In this embodiment, the outer diameter of the groove is preferably 1.5-2 mm larger than the outer diameter of the seal.

[0029] As a preferred embodiment, the seal is a rectangular seal, and the height of the seal is 1 to 1.5 mm greater than the depth of the groove. In this embodiment, the height of the seal is preferably 1.5 mm greater than the depth of the groove. The seal adopts an imported rectangular seal, which has a large contact area with the end face of the flange pipe, good sealing performance, strong sealing impact resistance, long sealing service life, and is safe and reliable. At the same time, the elastic deformation of 1-1.5 mm makes the sealing effect better.

[0030] As a preferred embodiment, the outer diameter of the flange plug plate is the same as the outer diameter of the flange plate, which is convenient for installation and alignment.

[0031] As a preferred embodiment, the inner diameter of the flange plug plate is the same as the inner diameter of the flange connecting pipe, which can reduce the hydraulic fluid resistance inside the pipe diameter and avoid pressure loss.

[0032] As a preferred embodiment, a plane is processed on the circumference of the flange plug plate, and an internal threaded hole for lifting the flange plug plate is provided on the plane, which facilitates the disassembly and installation of the flange plug plate, improves work efficiency, and saves time and effort.

[0033] As a preferred embodiment, the plurality of bolt mounting holes 1 are evenly distributed on the flange, and the number and size of the bolt mounting holes 2 on the flange plug plate are exactly the same as those of the bolt mounting holes 1 on the flange, thereby ensuring the sealing and stability of the entire flange.

[0034] There are two flange pipes and two flange plates. During installation, the two flange pipes are respectively installed in the central through holes of the corresponding flange plates. The two rectangular seals are respectively placed in the annular grooves on the two end surfaces of the flange plug plate. Then the flange plug plate is placed between the sealing surfaces of the two flange pipes. The hexagonal bolts are successively passed through the corresponding bolt mounting holes of the flange plate on one side, the flange plug plate, and the flange plate on the other side, and then threadedly connected with the fastening nuts. After tightening the fastening nuts, the flange pipe and the flange plug plate are connected as a sealed whole.

[0035] In the utility model of the high-pressure flange with plug-in plate, the flange pipe, flange plate and flange plug-in plate are separate parts, which are easy to process and install. It can realize the rapid connection between the large-flow ultra-high-pressure pipelines of the hydraulic press, and can effectively solve the two major problems of high-pressure pipeline flange leakage and seal replacement difficulties; at the same time, this kind of high-pressure flange has strong versatility, wide application range, simple production and low cost. The high-pressure flange can withstand a pressure of about 40-50MPa, runs smoothly and reliably, and has strong impact and vibration resistance.

[0036] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A high-pressure flange with a plug plate, characterized in that: It includes a pair of flange pipes, a pair of flange plates, a flange plug plate, a plurality of connecting bolts and fastening nuts thereof, wherein the flange plate is a concave structure, a central through hole is provided in the center of the flange plate, the inner stepped surface of the flange plate matches the outer stepped surface of the flange pipe, and each of the flange pipes is installed in the central through hole of the corresponding flange plate; the flange plug plate is an annular structure, a plurality of bolt mounting holes 1 are arranged on the flange plate, and a plurality of bolt mounting holes 2 are correspondingly arranged on the flange plug plate, the flange plug plate is placed between the sealing surfaces of the two flange pipes, and seals are respectively provided between the two end surfaces of the flange plug plate and the corresponding flange pipe sealing surfaces, the connecting bolts are sequentially passed through the bolt mounting holes of the flange plate on one side, the flange plug plate, and the flange plate on the other side, and then are threadedly connected with the fastening nuts, and the fastening nuts are tightened to connect the flange pipe and the flange plug plate into a sealed whole.

2. The high-pressure flange with a plug plate according to claim 1, characterized in that: Annular grooves are respectively processed on both end surfaces of the flange plug plate near its inner hole, and the seal is placed in the grooves.

3. The high pressure flange with insert plate according to claim 2, characterized in that: The inner diameter of the groove is the same as the inner diameter of the seal, and the outer diameter of the groove is larger than the outer diameter of the seal.

4. The high-pressure flange with a plug plate according to claim 3, characterized in that: The outer diameter of the groove is 1.5 to 2 mm larger than the outer diameter of the seal.

5. The high pressure flange with insert plate according to claim 2, characterized in that: The seal is a rectangular seal; the height of the seal is 1 to 1.5 mm greater than the depth of the groove.

6. The high pressure flange with insert plate according to claim 1, characterized in that: The outer diameter of the flange plug plate is the same as the outer diameter of the flange disc.

7. The high pressure flange with insert plate according to claim 1, characterized in that: The inner diameter of the flange plug plate is the same as the inner diameter of the flange connecting pipe.

8. The high pressure flange with insert plate according to claim 1, characterized in that: A plane is processed on the circumference of the flange plug plate, and an internal threaded hole for lifting the flange plug plate is arranged on the plane.

9. The high pressure flange with insert plate according to claim 1, characterized in that: A plurality of bolt mounting holes are evenly distributed on the flange.

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