Integral Yankee dryer drainage elbow structure

Abstract

The utility model belongs to the technical field of drainage elbows, and discloses an integral type Yankee dryer drainage elbow structure which comprises a water catchment header pipe, a connecting base is fixedly installed on the left side of the water catchment header pipe, a first external flange is fixedly installed on the right side of the water catchment header pipe, and the integral type drainage elbow pipe is an integral welding type flange. A sealing gasket is assembled between the main water catchment pipe and the main water catchment pipe; the integral drainage elbow penetrates through the welded flange, and fillet welds are welded to the two sides of the welded flange. The integral drainage elbow pipe is integral and has no fracture risk; the bent pipe flange plane is machined, and the corresponding assembling face of the water catchment header pipe is also machined; the large-plane sealing mode is stable and reliable; an embedded seam allowance is machined in the outer circle of the water catchment header pipe, and the integral drainage elbow pipe is matched with the embedded seam allowance in an embedded mode; the embedded seam allowance and the sealing gasket ensure that the integral drainage elbow is reliably positioned in the axial direction and the radial direction in the using process, and sealing failure caused by displacement is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of drainage elbows, in particular to an integral Yankee cylinder drainage elbow structure. Background Art

[0002] After the steam in the Yankee cylinder is condensed, the condensed water is discharged from the cylinder in the following way: first, it is siphoned to the water collecting main pipe by the siphon pipe arranged in the groove, and then lifted to the center of the drying cylinder by the lifting pipe on the water collecting main pipe. The lifting pipe and the water collecting main pipe in the center of the shaft head are connected by a drainage elbow.

[0003] In the past, the drainage elbow and the main water pipe were fixed and sealed by the slip-on method. That is, the end of the drainage elbow was welded with a slip-on, and the slip-on was covered with a flange; the corresponding assembly position of the main water pipe was processed and positioned, and the stop was sealed; the end of the slip-on and the stop of the main water pipe were sealed with a sealing gasket, and the bolts on the outer flange were used to tighten the main water pipe.

[0004] The loop structure is only suitable for low-speed Yankee cylinders. During use, the weld of the loop often breaks, resulting in the inability to discharge condensed water, which floods the cylinder and causes shutdown. Since the Yankee cylinder drain pipe is made of stainless steel, it expands inconsistently with the Yankee cylinder body after being heated. Although the arc is set in the drainage elbow to achieve free expansion, the drying cylinder works dynamically and the force is complex. It is easy to fail in the weak link of the welding between the loop and the elbow. In addition, the loop may move from the water collection cone, the bolts may break, the seal may fail, etc., which also cause shutdown; the reason is that the sealing surface of the loop is small and cannot resist the stress on the aforementioned elbow;

[0005] When in use, Yankee cylinders are used in tissue paper machines and are the core components of paper machines. In addition, for continuous production, unexpected downtime will cause direct and indirect losses to customers and seriously affect the overall operating reliability of the Yankee cylinder; therefore, we proposed an integrated Yankee cylinder drainage elbow structure. Utility Model Content

[0006] The utility model aims to provide an integral Yankee cylinder drainage elbow structure to solve the existing problems.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] An integral Yankee cylinder drainage elbow structure comprises a water collecting main pipe, a connecting base is fixedly installed on the left side of the water collecting main pipe, a first external flange is fixedly installed on the right side of the water collecting main pipe, a plurality of welding flanges are arranged above the first external flange, a plurality of locking bolts are threadedly installed on the inner sides of the connecting base and the welding flange, and a plurality of fixing nuts are threadedly installed on the outer sides of the locking bolts.

[0009] As a further improvement of the above solution, a plurality of threaded holes are provided above the first external flange and the welded flange, and the locking bolts are threadedly installed inside the threaded holes.

[0010] As a further improvement of the above solution, an embedded rabbet is provided on the outer circumference of the water collecting main pipe, and a sealing gasket is provided between one side of the welded flange and the embedded rabbet.

[0011] As a further improvement of the above solution, an integral drain elbow is fixedly installed inside the welded flange, and the integral drain elbow is in interference fit with the embedded rabbet.

[0012] As a further improvement of the above solution, a second external flange is fixedly installed on the outer side of one end of the integral drain elbow, and the integral drain elbow is in an L shape.

[0013] By adopting the above technical solution, the integral drain elbow can be connected to the water supply pipe through the second external flange, making the connection of the device to other pipes more convenient and fast.

[0014] As a further improvement of the above solution, the water collecting main pipe is in a funnel shape, and the integral drain elbow and the welded flange are connected by welding.

[0015] By adopting the above technical solution, fillet welds are welded on both sides of the welded flange. The integral drain elbow is integral, without the risk of fracture; and the shape of the water collecting main pipe facilitates the discharge of condensed water by a plurality of integral drain elbows.

[0016] As a further improvement of the above solution, the sealing gasket is made of rubber material, and a plurality of through holes are provided above the sealing gasket.

[0017] By adopting the above technical solution, the embedded rabbet and the sealing gasket ensure the reliable axial and radial positioning of the integral drain elbow during use, and prevent the sealing failure caused by displacement.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] The integral drain elbow is an integral welded flange, a sealing gasket is assembled between the integral drain elbow and the water collecting main pipe, and large-plane sealing is adopted; the integral drain elbow passes through the welded flange, and fillet welds are welded on both sides of the welded flange. The integral drain elbow is integral, without the risk of fracture.

[0020] The curved pipe flange is machined on the plane, and the corresponding assembly surface of the water collecting main pipe is also machined. This is the large-plane sealing method, which is stable and reliable. An embedded stop is machined on the outer circle of the water collecting main pipe, and the integral drainage elbow is embedded and fitted with the embedded stop. The embedded stop and the gasket ensure that the integral drainage elbow is reliably positioned axially and radially during use, and the sealing failure will not be caused by displacement.

[0021] This structure is compact in design, convenient to install and reliable in operation. Compared with the traditional loose flange structure, the work of machining the loose flange and the assembly stop of the water collecting pipe is omitted, that is, it is convenient to machine and the cost is lower. Brief Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for describing the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a schematic side structure diagram of the present invention;

[0024] Figure 2 It is a schematic partial structure diagram of the present invention;

[0025] Figure 3 For Figure 1 the enlarged structure diagram of part A in

[0026] In the figure: 1. Water collecting main pipe; 2. Connecting base; 3. First external flange; 4. Welded flange; 5. Locking bolt; 6. Fixed nut; 7. Embedded stop; 8. Gasket; 9. Integral drainage elbow; 10. Second external flange. Detailed Description of the Embodiments

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0028] Refer to Figures 1-3, an integral Yankee cylinder drain elbow structure, including a water collecting main pipe 1. A connecting base 2 is fixedly installed on the left side of the water collecting main pipe 1, and a first external flange 3 is fixedly installed on the right side of the water collecting main pipe 1. A plurality of welded flanges 4 are arranged above the first external flange 3. A plurality of locking bolts 5 are installed inside the connecting base 2 and the welded flanges 4 in a threaded manner, and a plurality of fixing nuts 6 are installed on the outside of the locking bolts 5 in a threaded manner.

[0029] In this embodiment, a plurality of threaded holes are opened above the first external flange 3 and the welded flanges 4, and the locking bolts 5 are installed inside the threaded holes in a threaded manner.

[0030] In this embodiment, an embedded rabbet 7 is opened on the outer circle of the water collecting main pipe 1, and a gasket 8 is arranged between one side of the welded flange 4 and the embedded rabbet 7.

[0031] In this embodiment, an integral drain elbow 9 is fixedly installed inside the welded flange 4, and the integral drain elbow 9 is in an interference fit with the embedded rabbet 7.

[0032] In this embodiment, a second external flange 10 is fixedly installed on the outside of one end of the integral drain elbow 9, and the integral drain elbow 9 is in an L shape.

[0033] In this embodiment, the water collecting main pipe 1 is in a funnel shape, and the integral drain elbow 9 and the welded flange 4 are connected by welding.

[0034] In this embodiment, the gasket 8 is made of rubber material, and a plurality of through holes are opened above the gasket 8.

[0035] The implementation principle of an integral Yankee cylinder drain elbow structure in the embodiment of this application is as follows: The integral drain elbow 9 is an integral welded flange. A gasket 8 is assembled between the integral drain elbow 9 and the water collecting main pipe 1, and large-plane sealing is adopted. The integral drain elbow 9 passes through the welded flange 4, and fillet welds are welded on both sides of the welded flange 4. The integral drain elbow 9 is integral and has no risk of fracture. The plane of the elbow flange is machined, and the corresponding assembly surface of the water collecting main pipe 1 is also machined. That is, the large-plane sealing method is stable and reliable. An embedded rabbet 7 is machined on the outer circle of the water collecting main pipe 1, and the integral drain elbow 9 is in an interference fit with the embedded rabbet 7. The embedded rabbet 7 and the gasket 8 ensure that the integral drain elbow 9 is reliably positioned axially and radially during use and does not cause sealing failure due to displacement. This structure is compact in design, convenient to install, and reliable in operation. Compared with the traditional loose flange structure, the work of machining the loose flange and the assembly rabbet of the water collecting pipe is omitted, that is, it is convenient to machine and has lower cost.

[0036] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0037] The above has introduced in detail an integral Yankee cylinder drain elbow structure provided by the present utility model. Specific embodiments are used herein to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only for helping to understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. An integrated Yankee cylinder drainage elbow structure, characterized in that: include: A water collection main pipe (1), wherein a connection base (2) is fixedly installed on the left side of the water collection main pipe (1), a first external flange (3) is fixedly installed on the right side of the water collection main pipe (1), a plurality of welding flanges (4) are arranged above the first external flange (3), a plurality of locking bolts (5) are threadedly installed on the inner sides of the connection base (2) and the welding flange (4), and a plurality of fixing nuts (6) are threadedly installed on the outer sides of the locking bolts (5).

2. The integrated Yankee cylinder drainage elbow structure according to claim 1, characterized in that: A plurality of threaded holes are provided above the first external flange (3) and the welding flange (4), and the locking bolts (5) are threadedly mounted on the inner sides of the threaded holes.

3. The integrated Yankee cylinder drainage elbow structure according to claim 1, characterized in that: An embedded stopper (7) is provided on the outer circumference of the water collecting main pipe (1), and a sealing gasket (8) is provided between the welded flange (4) and one side of the embedded stopper (7).

4. The integrated Yankee cylinder drainage elbow structure according to claim 1, characterized in that: An integral drainage elbow (9) is fixedly mounted on the inner side of the welded flange (4), and the integral drainage elbow (9) is embedded and matched with the embedded stopper (7).

5. The integrated Yankee cylinder drainage elbow structure according to claim 4, characterized in that: A second external flange (10) is fixedly mounted on the outer side of one end of the integral drainage elbow (9); the shape of the integral drainage elbow (9) is L-shaped.

6. The integrated Yankee cylinder drainage elbow structure according to claim 4, characterized in that: The water collecting main pipe (1) is funnel-shaped, and the integral drainage elbow (9) is connected to the welded flange (4) by welding.

7. The integrated Yankee cylinder drainage elbow structure according to claim 3, characterized in that: The sealing gasket (8) is made of rubber material, and a plurality of through holes are provided on the top of the sealing gasket (8).

Images