Nozzle stub structure and attaching position changing method

Abstract

Provided are a nozzle stub structure and an attaching position changing method that make it possible to change the position of an insert without making a major modification to a pressure container or a nozzle stub. The present invention is provided with: a nozzle stub body (310) that is connected to a pressure container (120) and has formed therein an insertion hole (313) for inserting a burner (200) from the outside of the pressure container (120) toward the inside thereof; and a sealing member (320) that is provided to an end portion (312) of the stub body (310) so as to block the insertion hole (313). The sealing member (320) has formed therein an opening (321) for positioning the burner (200) with the burner (200) inserted thereinto. The central axis (Co) of the opening (321) is eccentric with respect to the central axis (Ch) of the insertion hole (313) of the nozzle stub body (310).

Description

Tube base structure and method for changing mounting position

[0001] The present disclosure relates to a tube base structure and a method for changing a mounting position.

[0002] For example, the two-stage gasification furnace described in Patent Document 1 is generally composed of a furnace body as a container, an upper burner group, and a lower burner group. The furnace body has a cylindrical shape with a substantially constant cross-sectional area, and a gas outlet for导出 the gas generated inside the furnace body is opened at the top thereof.

[0003] Japanese Patent Application Laid-Open No. 2008-231295

[0004] The furnace body described in Patent Document 1 employs, for example, a double-wall structure having a water-cooled wall and a pressure vessel arranged so as to surround the water-cooled wall. At this time, when inserting an insert (for example, burners) from the outside to the inside of the pressure vessel, for example, a tube base may be welded to the pressure vessel, and the insert may be inserted into the inside of the pressure vessel through an insertion hole formed in the tube base.

[0005] When it is desired to change the position (for example, the height position) of the insert, this can be achieved by changing the position of the tube base. However, when changing the position of the tube base joined to the pressure vessel, a large-scale modification of the pressure vessel is required. Further, when the pressure vessel is a large and heavy object, it is difficult to transport the pressure vessel from the site (where the pressure vessel is installed) to the factory for processing, so a portable processing machine is brought to the site to perform processing of the pressure vessel at the site. However, since the capabilities and accuracy of portable processing machines are limited, there is a possibility that the processing may take a long time or it may be difficult to perform high-precision processing. Further, when changing the position of the tube base and welding the tube base to the pressure vessel again, records such as strength calculation, material certification, heat treatment, and non-destructive inspection are required to meet the regulatory requirements regarding the pressure vessel. Further, when performing the pressure resistance test and airtightness test required by the standards, there is a problem that the pressurization source becomes larger and has a larger capacity as the pressure vessel becomes larger.

[0006] This disclosure has been made in view of these circumstances and aims to provide a pipe support structure and a method for changing the mounting position that can change the position of an insert without making large-scale modifications to the pressure vessel or pipe support.

[0007] To solve the above problems, the following means will be employed for the pipe support structure and the method for changing the mounting position.

[0008] A pipe stand structure according to one aspect of the present disclosure comprises a pipe stand connected to the outer wall of a container, having an insertion hole formed therein for inserting an insert from the outside to the inside of the outer wall, and a sealing member provided at the end of the pipe stand to close the insertion hole, wherein an opening for inserting and positioning the insert is formed in the sealing member, and the central axis of the opening is eccentric with respect to the central axis of the insertion hole of the pipe stand.

[0009] A mounting position changing method according to one aspect of this disclosure is a method for changing the mounting position of an insert in the pipe support structure, wherein the mounting position of the insert is changed by changing the orientation of the sealing member with respect to the pipe support.

[0010] According to this disclosure, the position of the insert can be changed without making major modifications to the pressure vessel or pipe holder.

[0011] This is a schematic longitudinal cross-sectional view of a gasifier equipped with a pipe support according to the first embodiment of this disclosure. This is a transverse cross-sectional view along the cutting line II-II shown in Figure 1. This is a partially enlarged view of section F3 shown in Figure 1. This is a side view seen from arrow A4 shown in Figure 3. This is a partially enlarged view of section F3 shown in Figure 1 (after changing the position of the burner). This is a side view seen from arrow A6 shown in Figure 5. This is a partially enlarged view of a schematic longitudinal cross-sectional view of a gasifier equipped with a pipe support according to the second embodiment of this disclosure. This is a side view of a sealing member according to modified example 7.

[0012] Hereinafter, a pipe support structure and a method for changing the mounting position according to one embodiment of this disclosure will be described with reference to the drawings.

[0013] [First Embodiment] Hereinafter, the pipe support structure and mounting position changing method according to the first embodiment of this disclosure will be described with reference to the drawings.

[0014] <About the configuration of the pipe support structure> As shown in Figures 1 to 3, the gasification furnace 10 includes, for example, a container 100 in which a gasification section 101 and a quench section 102 are formed inside, a plurality of burners 200 inserted into the container 100, and a pipe support structure 300 for installing the burners 200 in the container 100.

[0015] As shown in Figure 1, the container 100 constitutes the main body of the gasification furnace 10. The container 100 is, for example, roughly cylindrical with axis X as its central axis. Axis X extends, for example, in the vertical direction. Inside the container 100, a gasification section 101 and a quench section 102 located below the gasification section 101 are formed.

[0016] The container 100 has a water-cooled wall 110 as an inner wall and a pressure vessel 120 as an outer wall that covers the water-cooled wall 110. In other words, the container 100 has a double-wall structure with a water-cooled wall 110 as an inner wall and a pressure vessel 120 as an outer wall.

[0017] The water-cooled wall 110 has, for example, multiple water-cooled tubes and fins connecting adjacent water-cooled tubes. The upper part of the water-cooled wall 110 is a constricted section 111 with a reduced inner diameter. The lower surface of the constricted section 111 is the ceiling 111a. The lower part of the water-cooled wall 110 is a slag tap 112 with a reduced inner diameter. The upper surface of the slag tap 112 is the furnace bottom 112a.

[0018] The space above the slag tap 112 is the gasification section 101, and the space below the slag tap 112 is the quench section 102. In other words, the inside of the water-cooled wall 110 is divided vertically by the slag tap 112, with the upper space being the gasification section 101 and the lower space being the quench section 102. The gasification section 101 and the quench section 102 are in communication through an opening formed in the center of the slag tap 112. This allows the molten slag generated in the gasification section 101 to flow down from the opening into the quench section 102.

[0019] The pressure vessel 120 is a pressure-resistant vessel that covers the water-cooled wall 110. A separation space S is formed between the water-cooled wall 110 and the pressure vessel 120. This separation space S is not in communication with the inside of the water-cooled wall 110 (gasification section 101).

[0020] Multiple burners 200, each having a horizontally extending central axis Cb, are inserted into the container 100 configured in this way. Each burner 200 is a device that injects finely powdered fuel, obtained by crushing solid organic raw materials (for example, coal or biomass fuel), together with a gasifying agent such as oxygen, into the gasification section 101 for combustion.

[0021] As shown in Figure 1, the burner 200 includes a lower burner 210 and an upper burner 220. The lower burner 210 is a burner 200 located near the bottom 112a of the furnace. On the other hand, the upper burner 220 is a burner 200 located above the lower burner 210 and near the ceiling 111a. As shown in Figure 2, for example, the lower burners 210 are evenly distributed around the axis X with respect to the peripheral walls (inner and outer walls) of the container 100. The nozzles at the tips of each lower burner 210 are not directed toward the axis X of the container 100, but are directed outward from the axis X. That is, the central axis Cb of each lower burner 210 does not intersect the axis X of the container 100. By arranging the lower burners 210 in this way, a swirling flow is formed in the gasification section 101. The upper burners 220 are arranged similarly.

[0022] The burner 200 is installed in the container 100 using a pipe support structure 300. The following explanation will use the lower burner 210 as an example. As shown in Figure 3, the pipe support structure 300 has a pipe support body (pipe support) 310 and a sealing member 320.

[0023] The pipe support body 310 is a cylindrical member with an insertion hole 313 formed inside, and has a base end 311 and a tip end 312. The insertion hole 313 is a through hole having a central axis Ch extending in the horizontal direction, and communicates with the separation space S through an opening 121 formed in the pressure vessel 120. The base end 311 is the end face facing the outer surface of the pressure vessel 120 and is joined to the pressure vessel 120 by welding. Therefore, a welded portion 311a is formed between the base end 311 and the pressure vessel 120. The tip end 312 has a flange that expands radially with respect to the central axis Ch.

[0024] As shown in Figures 3 and 4, the sealing member 320 is a disc-shaped member. The sealing member 320 is provided at the tip 312 of the pipe support body 310 so as to close the insertion hole 313 of the pipe support body 310. At this time, the sealing member 320 is fixed (for example, by bolting) to a flange formed at the tip 312 of the pipe support body 310.

[0025] A circular opening 321 is formed in the sealing member 320. The opening 321 is a through-opening having a central axis Co extending in the horizontal direction and is in communication with the insertion hole 313. The opening 321 is also a through-opening for inserting the lower burner 210 and positioning the lower burner 210 relative to the sealing member 320. The central axis Cb of the lower burner 210 inserted and positioned in the opening 321 is approximately coincident with the central axis Co of the opening 321.

[0026] The lower burner 210, inserted into the opening 321, is inserted from the outside of the pressure vessel 120 towards the inside (separation space S) via the insertion hole 313, and the nozzle at the tip of each lower burner 210 reaches the inside of the water-cooled wall 110 (gasification section 101) through through holes provided in the water-cooled wall 110.

[0027] When the sealing member 320 is attached to the pipe support body 310, the central axis Co of the opening 321 is parallel to, but does not coincide with, the central axis Ch of the insertion hole 313. That is, the central axis Co of the opening 321 is eccentric with respect to the central axis Ch of the insertion hole 313. In the case of Figure 4, the central axis Co of the opening 321 is eccentric downward with respect to the central axis Ch of the insertion hole 313, and the amount of eccentricity is shown by ε. In this way, since the central axis Co of the opening 321 is eccentric with respect to the central axis Ch of the insertion hole 313, the position of the opening 321 with respect to the central axis Ch of the insertion hole 313 (i.e., the position of the lower burner 210) can be changed by changing the orientation of the sealing member 320. This makes it possible to change the position of the lower burner 210 without making large-scale modifications to the pressure vessel 120 or the pipe support body 310. Here, "changing the orientation of the sealing member 320" means, for example, rotating the sealing member 320 around the central axis Ch of the insertion hole 313, as shown in Figures 5 and 6.

[0028] In Figures 5 and 6, compared to Figures 3 and 4, the sealing member 320 is rotated around the central axis Ch of the insertion hole 313, thereby reversing the orientation of the sealing member 320. Figures 4 and 6 show black arrows indicating the angular position of the sealing member 320. In Figure 4, the black arrow points downward, and in Figure 6, it points upward. Since the eccentricity is ε, when the orientation of the sealing member 320 is reversed, the central axis Co of the opening 321 moves upward by 2ε. That is, the position of the central axis Cb of the lower burner 210 moves upward by 2ε. As a result, the distance from the furnace bottom 112a to the central axis Cb of the lower burner 210 changes. Specifically, the distance shown as h1 in Figure 3 becomes h2 (= h1 + 2ε) in Figure 5, allowing the lower burner 210 to be moved away from the furnace bottom 112a. Conversely, by performing the reverse operation, the lower burner 210 can be brought closer to the furnace bottom 112a again.

[0029] The inner diameter of the insertion hole 313 is set to, for example, 1.5 times or more the outer diameter of the lower burner 210. This ensures sufficient adjustment range for the mounting position of the lower burner 210. In this case, ε can be set to a maximum of 0.5 times or more the outer diameter of the lower burner 210. That is, the adjustment range for the mounting position of the lower burner 210 can be set to a maximum of or greater than the outer diameter of the lower burner 210. The inner diameter of the insertion hole 313 can be appropriately changed according to the required size of ε. Depending on the inner diameter of the insertion hole 313, reinforcement of the opening of the pressure vessel 120 in accordance with standards for pressure vessels may be necessary.

[0030] The upper burner 220 also employs a pipe support structure 300. This allows the upper burner 220 to be positioned further away from or closer to the ceiling 111a.

[0031] <Regarding the change in the height position of the lower burner 210> The distance from the furnace bottom 112a to the central axis Cb of the lower burner 210 affects the stability of molten slag discharge and the risk of burnout of the furnace bottom 112a. If the distance is too far, the heating effect of the slag tap 112 by the lower burner 210 is reduced, making the discharge of molten slag unstable. Furthermore, if the oxygen ratio (the ratio of the amount of oxygen to the amount of raw material supplied to the burner 200) is increased to increase the flame temperature in order to compensate for this, the efficiency of the gasification furnace 10 decreases. On the other hand, if the distance is too close, the furnace bottom 112a becomes locally hot, increasing the risk of burnout. In addition, the molten slag flows down the inner surface of the water-cooled wall 110 which is covered with refractory material, and the flowing molten slag functions as a coating layer, but the less ash content there is in the raw material, the thinner the coating layer becomes, and the water-cooled wall 110 is exposed to an even harsher high-temperature environment. Based on the above, it is preferable to adjust the height of the lower burner 210 in consideration of the ash content in the raw material and the temperature of the molten slag to achieve both reliability and efficiency.

[0032] <Regarding changes to the height position of the upper burner 220> The distance from the ceiling 111a to the central axis Cb of the upper burner 220 affects the degree of growth of deposits and the risk of thinning of the ceiling 111a. If the distance is too far, the particle concentration in the space between the ceiling 111a and the upper burner 220 increases, causing char to adhere to the ceiling 111a, or carbon flowers (unburned carbon deposits from the raw material) to grow from the tip of the upper burner 220, causing clogging of the nozzle. On the other hand, if the distance is too close, the ceiling 111a is not covered with refractory material, increasing the risk of thinning due to high-temperature sulfur corrosion. For these reasons, it is preferable to adjust the height position of the upper burner 220 in consideration of the amount of char generated and the sulfur concentration in the combustion gas to ensure reliability.

[0033] <Effects> An opening 321 for inserting and positioning the burner 200 is formed in the sealing member 320. Since the central axis Co of the opening 321 is eccentric with respect to the central axis Ch of the insertion hole 313 in the pipe support body 310, the position of the opening 321 (i.e., the position of the burner 200) relative to the central axis Ch of the insertion hole 313 can be changed by changing the orientation of the sealing member 320. This makes it possible to change the position of the burner 200 without making large-scale modifications to the pressure vessel 120 or the pipe support body 310. Note that changing the position of the burner 200 may require modification of the water-cooled wall 110, but modifying the water-cooled wall 110 is easier than modifying the pressure vessel 120 and does not pose a major problem.

[0034] If the inner diameter of the insertion hole 313 is 1.5 times or more the outer diameter of the burner 200, a sufficient amount of adjustment for the mounting position of the burner 200 can be ensured.

[0035] [Second Embodiment] Hereinafter, the pipe support structure and mounting position changing method according to the second embodiment of this disclosure will be described with reference to the drawings. Components identical to those in the first embodiment are denoted by the same reference numerals as in the first embodiment, and their detailed descriptions are omitted.

[0036] As shown in Figure 7, the pipe support structure 300 has either or both of the packing material 340 and the gas supply section 350.

[0037] The filler 340 is a component that fills the space around the lower burner 210 (the gap in the insertion hole 313) inside the insertion hole 313. Examples of filler 340 include fire-resistant materials and heat-insulating materials.

[0038] A seal box 330 is provided to cover the opening 121 of the pressure vessel 120, which is in communication with the insertion hole 313, from the inside of the pressure vessel 120, and the seal box 330 may be further filled with a filler 340.

[0039] The nozzle at the tip of the lower burner 210 reaches the interior of the water-cooled wall 110 (gasification section 101) through a through-hole provided in the water-cooled wall 110. Furthermore, the portion of the lower burner 210 located in the separation space S is covered by the burner outer cylinder 410 connected to the seal box 330. The interior of the burner outer cylinder 410 is not in communication with the separation space S. However, gas may flow into the interior of the burner outer cylinder 410 from the interior space of the water-cooled wall 110 (gasification section 101) through the through-hole provided in the water-cooled wall 110 (the through-hole into which the lower burner 210 is inserted). In this case, the gas flowing in from the gasification section 101 may flow through the gap between the lower burner 210 and the burner outer cylinder 410 to the insertion hole 313. Therefore, by filling the gaps in the insertion holes 313 and the inside of the seal box 330 with the filler 340, gas is prevented from flowing into the gaps in the insertion holes 313. If gas were to flow into the gaps in the insertion holes 313, it could cause burning or corrosion.

[0040] The gas supply unit 350 is a device that supplies an inert gas such as nitrogen around the lower burner 210 inside the insertion hole 313. By supplying the inert gas to the gap in the insertion hole 313, it prevents the gas flowing in from the gasification unit 101 from flowing into the gap in the insertion hole 313.

[0041] [Modification 1] The pipe support structure 300 can be applied not only to the container 100 of the gasification furnace 10, but also to other containers such as reaction towers used under pressurized conditions.

[0042] [Modification Example 2] The insert is not limited to the burner 200 (the lower burner 210 or the upper burner 220). For example, it may be instruments and sensors for measuring the state (temperature, pressure, components, etc.) inside the container, and cameras for observing the state inside the container.

[0043] [Modification Example 3] The shape of the opening 321 formed in the sealing member 320 is not limited to a circle and can be appropriately changed according to the shape of the insert.

[0044] [Modification Example 4] The shape of the insertion hole 313 of the pipe base body 310 is not limited to a cylinder and can be appropriately changed according to the shape of the insert.

[0045] [Modification Example 5] The fixing method of the sealing member 320 to the pipe base body 310 is not limited to bolt fastening, and any method such as clamp fixing or welding can be adopted.

[0046] [Modification Example 6] The insert inserted into the opening 321 of the sealing member 320 is fixed to the sealing member 320, but the fixing method is not particularly limited.

[0047] [Modification Example 7] As shown in FIG. 8, a plurality of openings 321 (321a, 321b) may be formed in one sealing member 320. When the eccentricity of the first opening 321a is ε1 and the eccentricity of the second opening 321b is ε2, ε1≠ε2 may be set. For the unused openings 321 (the openings 321 into which the burner 200 is not inserted) among the plurality of openings 321, they are blocked with a closing flange, a cover, or the like.

[0048] [Modification Example 8] Prepare a plurality of sealing members 320 each having openings 321 with different eccentricities, and change the position of the burner 200 by appropriately replacing the sealing member 320.

[0049] [Modification 9] The position of the burner 200 can be changed arbitrarily as long as it is inside the insertion hole 313. For example, the position of the burner 200 may be changed not only in the height direction (vertical direction) but also in the horizontal direction, or it may be changed in both the height direction and the horizontal direction. The position of the burner 200 can be arbitrarily adjusted by the orientation of the sealing member 320 and the position of the opening 321. In other words, the orientation of the sealing member 320 and the position of the opening 321 may be adjusted to match the desired position of the burner 200.

[0050] [Note] The pipe support structure and mounting position modification method described above can be understood, for example, as follows.

[0051] A pipe stand structure (300) according to a first aspect of the present disclosure comprises a pipe stand (310) connected to the outer wall (120) of a container (100), having an insertion hole (313) formed therein for inserting an insert (200) from the outside to the inside of the outer wall (120), and a sealing member (320) provided at the end (312) of the pipe stand (310) to close the insertion hole (313), wherein an opening (321) for inserting the insert (200) and positioning the insert (200) is formed in the sealing member (320), and the central axis (Co) of the opening (321) is eccentric with respect to the central axis (Ch) of the insertion hole (313) of the pipe stand (310).

[0052] An opening (321) for inserting and positioning the insert (200) is formed in the sealing member (320), and since the central axis (Co) of the opening (321) is eccentric with respect to the central axis (Ch) of the insertion hole (313) of the pipe support (310), the position of the opening (321) relative to the central axis (Ch) of the insertion hole (313) (i.e., the position of the insert (200)) can be changed by changing the orientation of the sealing member (320). This makes it possible to change the position of the insert (200) without making large-scale modifications to the outer wall (120) or the pipe support (310).

[0053] In the first embodiment, the pipe support structure (300) according to the second aspect of this disclosure has an inner diameter of the insertion hole (313) that is 1.5 times or more the outer diameter of the insert (200).

[0054] Since the inner diameter of the insertion hole (313) is set to be 1.5 times or more the outer diameter of the insert (200), a sufficient amount of change in the mounting position of the insert (200) can be ensured.

[0055] In the third aspect of the present disclosure, the pipe support structure (300) is configured such that, in the first or second aspect, the number of openings (321) formed in the sealing member (320) is multiple.

[0056] Since there are multiple openings (321) formed in the sealing member (320), the position of the openings (321) relative to the central axis (Ch) of the insertion hole (313) (i.e., the mounting position of the insertion object (200)) can be changed by changing the position of the openings (321) into which the insert (200) is inserted, without changing the orientation of the sealing member (320).

[0057] A pipe support structure (300) according to a fourth aspect of this disclosure, in any of the first to third aspects, includes a filler material (340) that fills the space around the insert (200) inside the insertion hole (313).

[0058] Since the insertion hole (313) is filled with a filler material (340) that fills the area around the insert (200), the possibility of gas flowing from the container (100) entering the gap inside the insertion hole (313) can be reduced.

[0059] A pipe support structure (300) according to a fifth aspect of the present disclosure includes, in any of the first to fourth aspects, a gas supply unit (350) that supplies an inert gas around the insert inside the insertion hole (313).

[0060] Since the insertion hole (313) is equipped with a gas supply unit (350) that supplies inert gas around the insert, the possibility of gas flowing from the container (100) entering gaps inside the insertion hole (313) can be reduced.

[0061] The pipe stand structure (300) according to the sixth aspect of this disclosure is a double-wall structure in any of the first to fifth aspects, wherein the container (100) has an outer wall (120) and an inner wall (110) located inside the outer wall (120).

[0062] Since the container (100) has a double-wall structure with an outer wall (120) and an inner wall (110) located inside the outer wall (120), for example, a pipe support structure (300) can be adopted for the container (100) of the gasifier.

[0063] In the seventh aspect of this disclosure, the pipe support structure (300) is such that, in the sixth aspect, the insert (200) reaches the inside of the inner wall (110).

[0064] In the eighth aspect of this disclosure, the pipe stand structure (300) is such that, in the seventh aspect, the container (10) is a gasification furnace (10).

[0065] In the ninth aspect of this disclosure, the pipe support structure (300) is such that, in any of the first to eighth aspects, the insert (200) is a burner (200) applied to a gasifier (10).

[0066] A mounting position changing method according to the tenth aspect of this disclosure is a mounting position changing method for changing the mounting position of an insert (200) in a pipe support structure (300) according to any of the first to ninth aspects, wherein the mounting position of the insert (200) is changed by changing the orientation of the sealing member (320) with respect to the pipe support (310).

[0067] 10 Gasification Furnace 100 Container 101 Gasification Section 102 Quench Section 110 Water-cooled Wall (Inner Wall) 111 Constriction Section 111a Ceiling 112 Slag Tap 112a Furnace Bottom 120 Pressure Vessel (Outer Wall) 121 Opening 200 Burner (Insertion) 210 Lower Burner 220 Upper Burner 300 Pipe Stand Structure 310 Pipe Stand Body (Pipe Stand) 311 Base End 311a Welded Section 312 Tip (End) 313 Insertion Hole 320 Sealing Member 321 Opening 330 Seal Box 340 Filler 350 Gas Supply Section 410 Burner Outer Cylinder Cb Central Axis (Burner Central Axis) Ch Central Axis (Insertion Hole Central Axis) Co Central Axis (Opening Central Axis) S Separate space X axis

Claims

1. A pipe stand structure comprising: a pipe stand connected to the outer wall of a container, having an insertion hole formed therein for inserting an insert from the outside of the outer wall toward the inside; and a sealing member provided at the end of the pipe stand to close the insertion hole, wherein an opening for inserting and positioning the insert is formed in the sealing member, and the central axis of the opening is eccentric with respect to the central axis of the insertion hole of the pipe stand.

2. The pipe support structure according to claim 1, wherein the inner diameter of the insertion hole is 1.5 times or more the outer diameter of the insert.

3. The pipe support structure according to claim 1, wherein the number of openings formed in the sealing member is multiple.

4. The pipe support structure according to claim 1, further comprising a filler material that fills the space around the insert inside the insertion hole.

5. The pipe support structure according to claim 1 or 4, further comprising a gas supply unit that supplies an inert gas around the insert inside the insertion hole.

6. The pipe stand structure according to claim 1, wherein the container has a double-wall structure having an outer wall and an inner wall disposed inside the outer wall.

7. The pipe support structure according to claim 6, wherein the insert reaches the inside of the inner wall.

8. The pipe support structure according to claim 7, wherein the container is a gasification furnace.

9. The pipe support structure according to claim 8, wherein the insert is a burner applied to a gasification furnace.

10. A method for changing the mounting position of an insert in a pipe support structure according to claim 1, the method for changing the mounting position of an insert by changing the orientation of the sealing member with respect to the pipe support.

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