CN204397834U - The assembly tooling of a kind of hot gas conduit internals - Google Patents

Abstract

The utility model discloses an assembly tool for the inner part of a hot gas conduit, which belongs to the technical field of nuclear power equipment processing accessories; the mandrel of the assembly tool is provided with an annular baffle, and the outer edge of the baffle is provided with a connecting part along the circumference. The end of the shaft is provided with a connecting piece, and the mandrel is also provided with a front fixed core support adapted to the inner diameter of the inner pipe of the hot gas duct; Structural design, using the contact between the baffle and the end of the inner pipe, and the contact between the outer edge of the baffle and the inclined wall of the inner pipe to realize the force of the inner pipe during the dragging process, and to overcome the inner pipe by pulling the cable to the end connector of the tooling. The friction between the filling insulation layer and the inner wall of the outer pipe, through this new assembly method supplemented by the use of assembly tooling, replaces the traditional manual assembly method, and realizes the high-efficiency filling of the insulation layer structure of the inner part of the hot gas conduit, ensuring that the insulation layer Filling quality, and effectively reduce the difficulty of filling.

Description

Assembly tooling for inner part of hot gas duct

technical field

The utility model relates to an auxiliary part for the assembly process of the thermal insulation layer on the inner wall of a pipe, in particular to a hot gas conduit internal part assembly tool used in a nuclear power unit, and belongs to the technical field of nuclear power equipment processing auxiliary workpieces.

Background technique

In the insulation construction of pipelines, the outer wall of the pipeline is generally used to wrap the insulation layer for insulation. This insulation structure is easy to operate and has high insulation efficiency. However, in the high-temperature gas-cooled reactor nuclear power plant, the hot gas conduit connected between the reactor and the steam generator is insulated by installing an insulating layer between double-layer pipes. Its structure is shown in Figure 1. The outer pipe is an integral pipe, and the inner pipe It is a segmented pipe, the outer pipe and the inner pipe are filled with an insulating layer, and an inclined wall is set between the outer pipe and the inner pipe to support the pipes. This structure makes the assembled insulating layer divided into two fillings with a triangular cross-section. The filling structure of such an internal insulation layer brings certain difficulties to the filling process.

Contents of the invention

The purpose of the invention of the present utility model is to: aim at the problems mentioned above, to provide a hot gas conduit inner part assembly tool, so that it can be used for the filling process of the thermal insulation layer in the hot gas conduit in the high temperature gas-cooled reactor nuclear power plant, and overcome the problems caused by the structure of the hot gas conduit. The difficulty of assembling the thermal insulation layer, ensuring the filling quality of the thermal insulation layer, reducing the difficulty of filling, and improving the filling efficiency.

The technical scheme that the utility model adopts is as follows:

A tool for assembling the inner part of a hot gas conduit, comprising a mandrel, on which an annular baffle is arranged, and the outer edge of the baffle is provided with a connecting portion adapted to the inclined wall of the hot gas conduit along the circumference, and the core A connector is provided at the end of the shaft, and a front centering support arranged along the circumference is also provided on the mandrel. The front centering support is located between the baffle plate and the connector, and the diameter of the front centering support is Adapts to the inner diameter of the inner tube of the hot gas conduit. In order to realize the high-quality and high-efficiency assembly of the thermal insulation layer in the hot gas conduit, the utility model proposes a brand-new assembly method, namely: fill the inner cylinder with the thermal insulation layer, and then push the inner cylinder to its outer cylinder This not only solves the difficulty of assembling the insulation layer on the dead corner of the triangular section, but also ensures the assembly quality of the insulation layer. However, there is a problem in this assembly method: during assembly, due to the friction between the insulation layer and the inner wall of the outer cylinder Larger and difficult to realize the simple advancement of the inner cylinder in the outer cylinder. The assembly tooling designed by the utility model adopts the design of the mandrel and the baffle, so that the assembly tooling can be used to complete the assembly of the inner tube filled with the thermal insulation layer by dragging during assembly, which solves the problem that the inner tube filled with the thermal insulation layer is outside. The friction force in the cylinder is large, which makes it difficult to push. The connecting part can be in contact with the inclined wall of the conduit. The middle part of the baffle is used to contact the end of the inner cylinder. The two contact positions are the tooling and the inner tube during the dragging process. The centering point of the workpiece is where the front centering support and the baffle are used to center the workpiece to ensure the smooth progress of the pulling process. The introduction of this filling and assembly method, and through the use of assembly tooling, achieve the technical effects of ensuring the quality of the insulation layer filling, reducing the filling difficulty, and improving the filling efficiency.

In the assembly tooling of the inner parts of the hot gas conduit of the present utility model, the said connecting part includes a guide cylinder and an adjusting backing ring, the said guiding cylinder is arranged at the outer edge of the baffle, and the said adjusting backing ring is sleeved on the outer diameter of the guiding cylinder On the surface, the adjusting backing ring is adapted to the inclined wall of the hot air duct. Such a structure enables the adjusting backing ring to be positioned in contact with the inclined wall of the hot gas conduit, so that the entire tooling is well stressed and has high mechanical strength.

Further, the adjustment backing ring is provided with a positioning groove, and the adjustment backing ring fits with the end of the inclined wall of the hot gas conduit through the positioning groove. The positioning groove can be engaged with the end of the inclined wall to improve the stability and safety of the positioning of the tooling in the construction process inside the hot gas conduit, and ensure the balance of the circumferential force on the inner pipe during the dragging process.

Further, the adjusting backing ring is adjustable and arranged on the outer diameter surface of the guide cylinder along the axial direction of the mandrel. This makes it possible to adjust the adjusting backing ring in the entire ring direction, so as to ensure that all parts of the adjusting backing ring are in contact with the inclined wall.

Further, sliders arranged along the circumference are arranged on the outer wall of the baffle. The outer wall of the baffle is in contact with the inner wall of the outer tube of the hot gas conduit through the slider, thereby reducing the contact area between the baffle and the inner wall of the outer tube and reducing the resistance during the process of pulling the tooling.

Further, the stop ring groove is provided on the baffle, and the stop ring groove is adapted to the end surface of the inner tube of the hot gas conduit, so that the stop ring groove can be used for matching and positioning contact with the end surface of the inner tube of the hot gas conduit, To assist the positioning of tooling.

In the assembly tooling of the inner part of the hot gas conduit of the present invention, a reinforcing rib plate is arranged between the baffle plate and the mandrel. Due to the large force on the baffle during the dragging process, the overall mechanical strength is improved through the design of the rib plate.

In the assembly tooling of the inner part of the hot gas conduit of the present invention, the mandrel is also provided with a rear fixed core support arranged along the circumference, and the rear fixed core support is located on the side of the baffle plate opposite to the front fixed core support, so The diameter of the back-fixing support is adapted to the inner diameter of the outer pipe of the hot gas conduit. The rear centering support can be used for auxiliary positioning of the rear section of the assembly tooling and the inner diameter of the outer pipe, to further ensure the coincidence of the axial direction of the tooling and the axial direction of the hot gas conduit, to ensure that the circumferential force of the tooling is uniform during the assembly process, and to ensure that the tooling is in the axial direction Stability of the assembly in the tube when unstressed.

The hot gas conduit internal part assembly tool of the utility model also includes a pulley or a pulley block used in conjunction with the hot gas conduit internal part assembly tool. The cooperative use of the pulley or the pulley block enables the connecting parts of the tooling to be connected and dragged by the cable through the engineering machinery.

In summary, due to the adoption of the above technical solution, the introduction of a new assembly method and the use of assembly tooling, the beneficial effects of the utility model are: the structure of the internal assembly tooling of the hot gas conduit is simple, and the mandrel and baffle plate The structural design uses the contact between the baffle plate and the end of the inner tube, and the contact between the outer edge of the baffle plate and the inclined wall of the inner tube to realize the force of the inner tube during the dragging process. The friction between the pipe filling insulation layer and the inner wall of the outer pipe realizes the high-efficiency filling of this insulation layer structure, ensures the quality of the insulation layer filling, and effectively reduces the difficulty of filling.

Description of drawings

Fig. 1 is the structural representation of the hot gas conduit assembled in the utility model;

Fig. 2 is a schematic diagram of assembly tooling of the present utility model;

Fig. 3 is an enlarged view of point A in Fig. 2 of the present utility model;

Fig. 4 is an enlarged view of point B in Fig. 2 of the present utility model;

Fig. 5 is a schematic diagram of the assembly process of the assembly tool of the present invention and the hot gas conduit.

Marks in the figure: 1-mandrel, 2-baffle, 3-connector, 4-front centering support, 5-guiding cylinder, 6-adjusting pad ring, 7-locating groove, 8-adjusting screw, 9- Slider, 10-stop ring groove, 11-reinforcing rib plate, 12-rear fixed core support, 13-outer tube, 14-inclined wall, 15-inner tube, 16-insulation layer.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in detail.

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

The hot gas conduit in the utility model, its structure as shown in Figure 1, is to adopt the mode of assembling insulation layer between double-layer pipes to carry out heat preservation, outer pipe 13 is an integral pipe, inner pipe 15 is segmented pipe, outer pipe 13 The insulation layer 16 is filled between the inner pipe 15 and the outer pipe 13 and the inner pipe 15 are provided with an inclined wall 14 for support between the pipes. One end of the inclined wall 14 is welded to the outer diameter of the inner pipe 15 before assembly. .

Example

As shown in Fig. 1 , the assembly tooling of the inner part of the hot gas conduit of the present utility model includes a mandrel 1 on which an annular baffle 2 is arranged. shaft 1, the outer edge of the baffle plate 2 is provided with a connecting part along the circumference that is adapted to the inclined wall of the hot gas conduit, the end of the mandrel 1 is provided with a connecting piece 3, and the mandrel 1 is also provided with a The front centering support 4 arranged around the circumference, the front centering support 4 is located between the baffle plate 2 and the connecting piece 3, the diameter of the front centering support 4 is adapted to the inner diameter of the inner pipe of the hot gas conduit. In this embodiment, the baffle 2 can be an integral ring-shaped plate body, or at least two rod-shaped/plate-shaped structures arranged along the circumference, and its main function is to be used for the inner tube 15 Stressed support during the pulling process, the junction of the outer edge of the baffle plate 2 can be any structure that can be in contact with the inclined wall 14, and the connecting piece 3 is a structure of a pull ring in this embodiment, which is welded to the core The end of the shaft 1 is used for the connection point of the cable when dragging the tooling. The front fixed core support 4 can be an integral annular plate structure, or several strip plate structures arranged along the circumference. In this embodiment Three strip-shaped plate structures arranged along the circumference are adopted, and the length thereof is adapted to the inner diameter of the inner tube of the hot gas conduit.

In this embodiment, the connecting portion includes a guide cylinder 5 and an adjustment backing ring 6, the guide cylinder 5 is arranged at the outer edge of the baffle plate 2, and the guide cylinder 5 is a ring structure, which is the same as the mandrel 1. The axis is set, and the guide cylinder 5 is set perpendicular to the plane of the baffle plate. The adjustment washer 6 is sleeved on the outer diameter surface of the guide cylinder 5. The adjustment washer 6 is provided with a positioning groove 7, and the adjustment washer 6 passes through the positioning groove. 7 is adapted to the end of the inclined wall of the hot gas conduit, as shown in Figure 2, Figure 3 and Figure 4.

Further, in this embodiment, the adjusting backing ring 6 can be adjusted on the outer diameter surface of the guide cylinder 5 along the axial direction of the mandrel 1 through the adjusting screw 8 provided on the baffle 2, and the adjusting screw 8 is positioned on the circumference of the baffle 2. Arranged evenly on the top, used to adjust the matching degree of the adjusting backing ring 6 and the inclined wall on the entire circumference.

In addition, in this embodiment, the outer wall of the baffle 2 is provided with a slider 9 arranged along the circumference (as shown in Figure 3), the slider 9 is fixedly welded to the outer wall of the baffle 2, and the outer wall of the slider 9 is a smooth arc structure to reduce the friction between the outer wall of the baffle plate 2 and the inner wall of the outer tube of the hot gas conduit; the baffle plate 2 is provided with a stop ring groove 10, and the stop ring groove 10 is adapted to the end surface of the inner tube of the hot gas conduit, as shown in the figure 2 and FIG. 4 , it is used to define the relative position between the end face of the inner tube 15 and the baffle plate 2 .

At the same time, the mandrel 1 is also provided with a rear centering support 12 arranged along the circumference, and the rear centering support 12 is located on the side of the baffle plate 2 opposite to the front centering support 4 (as shown in Figure 2 ), the structure of the rear centering support 12 is similar to that of the front centering support 4, and its diameter is adapted to the inner diameter of the outer tube of the hot gas conduit. The rear centering support 12 can be used for auxiliary positioning of the rear section of the tooling in the axial direction of the outer tube 13. In this embodiment, three rear centering supports 12 are arranged on the circumference of the mandrel 1, and the rear centering support 12 12 are evenly arranged on the circumference.

The hot gas conduit inner part assembling tool of the utility model also includes a pulley or a pulley block used in conjunction with the hot gas duct inner part assembling tool, so as to be used for the cable traction of the tool during use.

The assembly relationship between the assembly tooling of the inner part of the hot gas conduit of the present invention and the pipeline is shown in Figure 5, and the assembly process is as follows: before the second section of the inner tube is not assembled in place, firstly connect the inclined wall of the first section of the inner tube to the second section. Fill the insulation layer between the first inner tube and assemble it to the position of the outer tube, install the second inner tube into the outer tube and keep the distance between the second inner tube and the first inner tube to fit the second inner tube Filling of the insulation layer between the inclined wall of the inner pipe and the outer pipe, after filling the insulation layer between the inclined wall of the second inner pipe and the outer pipe, put the tooling into the end of the second inner pipe in the outer pipe and assemble it in place, pass The cable pulls the tooling to move the second section of the inner tube so that it can be joined with the first section of the inner tube, and the filling assembly is performed step by step in this order.

The assembly tooling of the inner part of the hot gas conduit of the utility model has a simple structure. Through the structural design of the mandrel and the baffle, the dragging of the inner pipe is realized by using the baffle to contact the end of the inner pipe, and the outer edge of the baffle to contact the inclined wall of the inner pipe. The force of the process is to overcome the friction between the inner pipe filling insulation layer and the inner wall of the outer pipe through the pulling of the cable to the end connector of the tooling, so as to realize the high-efficiency filling of the insulation layer structure of the inner part of the hot gas conduit and ensure the insulation layer Filling quality, and effectively reduce the difficulty of filling.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (9)

1. An assembly tool for the inner parts of a hot gas conduit, characterized in that it includes a mandrel (1), and an annular baffle (2) is arranged on the mandrel (1), and the outer edge of the baffle (2) is along the The circumference is provided with a connecting part adapted to the inclined wall of the hot gas conduit, the end of the mandrel (1) is provided with a connector (3), and the mandrel (1) is also provided with a front fixed core arranged along the circumference Support piece (4), the front center support piece (4) is located between the baffle plate (2) and the connecting piece (3), the diameter of the front center support piece (4) is suitable for the inner diameter of the inner pipe of the hot gas conduit match. 2. The hot gas conduit internal parts assembly tool according to claim 1, characterized in that: the said connecting part comprises a guide cylinder (5) and an adjusting backing ring (6), and said guide cylinder (5) is arranged on the baffle plate (2), the adjustment backing ring (6) is sleeved on the outer diameter surface of the guide cylinder (5), and the adjustment backing ring (6) is adapted to the inclined wall of the hot gas conduit. 3. The assembly tooling for hot gas conduit internal parts according to claim 2, characterized in that: the adjustment gasket (6) is provided with a positioning groove (7), and the adjustment gasket (6) passes through the positioning groove (7) and Hot gas conduit sloped wall end fit. 4. The tool for assembling the inner part of the hot gas conduit according to claim 2, characterized in that the adjusting backing ring (6) is adjustable and arranged on the outer diameter surface of the guide cylinder (5) along the axial direction of the mandrel (1). 5 . The tool for assembling the inner part of the hot gas conduit according to claim 1 , characterized in that: the outer wall of the baffle ( 2 ) is provided with sliders ( 9 ) arranged along the circumference. 6 . 6. The hot gas conduit internal assembly tooling according to claim 1, characterized in that: the baffle plate (2) is provided with a stop ring groove (10), and the stop ring groove (10) is connected with the hot gas conduit Inner tube end face fit. 7. The tool for assembling the inner part of the hot gas conduit according to claim 1, characterized in that: a reinforcing rib plate (11) is arranged between the baffle plate (2) and the mandrel (1). 8. The hot gas conduit internal parts assembly tool according to claim 1, characterized in that: the mandrel (1) is also provided with a rear centering support (12) arranged along the circumference, and the rear centering support The piece (12) is located on the side of the baffle (2) opposite to the front centering support (4), and the diameter of the rear centering support (12) is adapted to the inner diameter of the outer pipe of the hot gas conduit. 9. The tool for assembling the inner part of the hot gas duct according to claim 1, further comprising a pulley or a pulley block used in cooperation with the tool for assembling the inner part of the hot gas duct.