CN217736652U

CN217736652U - Foreign matter falling prevention tool for flange repair

Info

Publication number: CN217736652U
Application number: CN202222001996.0U
Authority: CN
Inventors: 王扬; 李松; 董宝泽; 王信东; 王斌元; 耿加森; 王超; 郦元辉; 林鑫辉; 付建龙; 朱铃峰; 郑厉琦
Original assignee: Sanmen Nuclear Power Co Ltd
Current assignee: Sanmen Nuclear Power Co Ltd
Priority date: 2022-08-01
Filing date: 2022-08-01
Publication date: 2022-11-04
Anticipated expiration: 2032-08-01

Abstract

The utility model relates to the technical field of flange maintenance, in particular to a foreign body drop prevention tool for flange repair, which comprises a chassis, wherein part of the chassis is of a disc structure, and the outer diameter of the disc is matched with the inner diameter of a channel of a flange; the chassis is covered in the circulation path of the channel in a limiting way through a clamping structure so as to form a foreign matter falling prevention structure; the clamping structure comprises a connecting wall and supporting bolts, wherein the connecting wall is arranged on the chassis, the supporting bolts are alternately connected to the connecting wall through thread structures, and the two supporting bolts opposite to each other jointly form a clamping structure acting on the inner wall of the channel. The utility model discloses preferred foreign matter drop prevention instrument comes to install temporarily in the passageway of flange, avoids the foreign matter to drop to heat exchanger inside, makes flange joint face's roughness repair process can normally develop.

Description

Foreign matter falling prevention tool for flange repair

Technical Field

The utility model relates to a flange maintenance technical field, more specifically say and relate to a prevent foreign matter instrument that drops for flange is restoreed.

Background

The shield main pump serves as a critical device of the power plant for delivering the reactor coolant to complete the cycle between the core, the primary circuit and the steam generator. The shielding main pump comprises a shielding main pump heat exchanger which is used for cooling the internal medium of the shielding main pump, so that the safe and reliable operation of the shielding main pump is ensured. The shielding main pump heat exchanger needs to be assembled through a flange structure after arriving at the field, and in actual production assembly, the condition that the surface roughness deviation of the flange is large often appears, so that the connecting surface of the flange needs to be repaired, and the roughness of the connecting surface of the flange is repaired to be between 125 and 250 Ra. Meanwhile, as the repaired flange surface of the heat exchanger is positioned at the top of the heat exchanger, scrap iron produced in the repair process of the flange surface is easy to fall into the heat exchanger. Therefore, a foreign-body-preventing tool is required to be arranged for the flange structure and the installation position, and is used for preventing foreign bodies such as scrap irons from falling into the heat exchange in the process of repairing the flange surface.

Disclosure of Invention

The utility model aims at prior art's weak point, provide a prevent foreign matter instrument that drops for flange is prosthetic, come to install in the passageway of flange temporarily, avoid the foreign matter to drop to inside the heat exchanger.

The utility model discloses a technical solution measures as follows:

a foreign object drop prevention tool for flange repair, comprising:

the part of the chassis is of a disc structure, and the outer diameter of the disc is matched with the inner diameter of the channel of the flange; the chassis is covered in the circulation path of the channel in a limiting way through a clamping structure so as to form a foreign matter falling prevention structure; screens structure includes connecting wall and stay bolt, wherein:

the connecting wall is arranged on the chassis, the supporting bolts are alternately connected to the connecting wall through a threaded structure, and the two opposite supporting bolts jointly form the clamping structure acting on the inner wall of the channel.

Among the above-mentioned scheme, through installing the chassis temporarily, detachably in the passageway of flange, block from outside, through the passageway of flange, reentrant heat exchanger flow channel in the inside, avoid foreign matters such as iron fillings to get into the heat exchanger in, guarantee that flange joint face's roughness repair process can normally develop.

Preferably, the device further comprises a ring kit with an elastic structure, and the connecting wall is an annular wall; the ring sleeve piece is sleeved on the outer ring of the annular wall, so that the annular wall is connected with the inner wall of the channel through the ring sleeve piece.

As a preferable scheme, a containing groove is formed around the periphery of the annular wall, an opening of the containing groove faces the inner wall of the channel, and the ring sleeve is sleeved in the containing groove.

Preferably, the chassis further comprises a handle, and the handle is arranged on the chassis to form a holding structure when the chassis moves.

Preferably, the handle is screwed on the chassis.

As a preferred scheme, a bulge is arranged on the chassis, and the handle is screwed in the bulge; and a material collecting groove is formed between the bulge part and the connecting wall and is used for containing foreign matters falling onto the chassis.

Preferably, the handle is an integrally formed structure arranged on the chassis.

Preferably, the protective sleeve is of an elastic structure, the protective sleeve is sleeved on the outer ring of the annular wall, the mounting position of the protective sleeve is matched with the mounting position of the supporting bolt, and the supporting bolt acts on the inner wall of the channel through the protective sleeve.

Preferably, an installation groove is formed around the periphery of the annular wall, an opening of the installation groove faces the inner wall of the channel, and the protective sleeve is sleeved in the installation groove.

Preferably, the top end of the connecting wall is provided with a guide surface for guiding foreign matters falling on the top of the connecting wall onto the chassis.

The utility model discloses a main beneficial effect lies in:

1. the chassis is clamped in the channel to form a foreign matter falling prevention structure, so that foreign matters such as scrap iron and the like can be prevented from falling into the heat exchanger from the channel to the maximum extent. Meanwhile, the clamping structure is adopted to clamp the chassis in the channel, so that the installation and the disassembly are more convenient, and the foreign matter falling prevention tool can be repeatedly used.

2. Through setting up elastic ring external member, make the inner wall that the connecting wall passes through ring external member and passageway meet, can form the protection to the inner wall of passageway, avoid haring the inner wall of passageway. Meanwhile, the ring sleeve piece is arranged in the accommodating groove of the connecting wall, so that the ring sleeve piece can be prevented from shifting greatly, the ring sleeve piece is tightly connected with the inner wall of the channel, and the effect of preventing foreign matters from falling is improved.

3. The handle is arranged on the chassis, so that the chassis is convenient to move, and particularly the chassis is convenient to insert into the channel. And the handle is arranged on the chassis through the thread structure, so that the handle can be detached from the chassis for storage or transportation, and the portability is better.

4. Make the stay bolt act on the inner wall of passageway through the lag, can further avoid haring the inner wall of passageway, also further improved the leakproofness of preventing the foreign matter instrument that drops in the passageway simultaneously, promoted the effect that prevents the foreign matter and drop.

5. The guide surface and the mounting groove are arranged, so that foreign matters falling on the chassis can be better collected; meanwhile, foreign matters are collected in the mounting groove in a centralized mode, the foreign matters can be prevented from interfering with a threaded connection structure between the handle and the chassis, and the smooth dismounting/mounting of the handle is guaranteed.

Further or more specific advantages will be described in the detailed description in connection with the specific embodiments.

Drawings

The invention will be further explained with reference to the drawings:

fig. 1 is a schematic view of the assembly structure of the present invention.

Fig. 2 is a sectional view of the handle structure of the present invention.

Fig. 3 is a sectional view of the handle structure of the present invention.

Fig. 4 is a sectional view of the mounting structure of the protective cover of the present invention.

Fig. 5 is a structural sectional view of the connecting wall of the present invention.

Fig. 6 is a top cross-sectional view of the present invention.

Shown in the figure: the structure comprises a chassis 1, a connecting wall 101, a containing groove 1011, a mounting groove 1012, a guide surface 1013, a handle 102, a boss 103, a material collecting groove 104, a flange 2, a channel 201, a supporting bolt 3, a ring sleeve piece 4 and a protective sleeve 5.

Detailed Description

The following description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. In addition, the terms "vertical", "horizontal", "top", "bottom", "front", "back", "upper", "lower", "inner", "outer", and the like in the embodiments of the present invention refer to the orientation or positional relationship based on the orientation or positional relationship shown in fig. 1, or the orientation or positional relationship that the product is conventionally placed when in use, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. It is further noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured" and the like in the description are to be construed broadly and include, for example, "connected," which may be fixedly connected, detachably connected, or integrally connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As a first embodiment of the present invention, a foreign object falling prevention tool for flange repair, referring to fig. 1 to fig. 6, includes a chassis 1, because a channel 201 of a flange 2 is a circular hole, in order to make the chassis 1 be well installed in the channel 201, the foreign object falling is prevented; at least part of the chassis 1 in the embodiment is of a disc structure, and the outer diameter of the disc is matched with the inner diameter of the channel 201 of the flange 2; there are two cases of adaptation here: firstly, the outer diameter of the disc is completely consistent with the inner diameter of the channel 201 of the flange 2, and the chassis 1 is clamped in the channel 201 through a clamping structure, so that the channel 201 is blocked, and foreign matters can be prevented from falling into the heat exchanger; secondly, the outer diameter of the disc is slightly smaller than the inner diameter of the channel 201 of the flange 2, and at this time, the ring sleeve 4 needs to be added to achieve the effect of blocking the channel 201, so that the foreign matters are prevented from falling into the heat exchanger.

Specifically, in this embodiment, the chassis 1 is covered in the circulation path of the channel 201 in a limited manner by a clamping structure, where the limited manner refers to: the chassis 1 is clamped in a certain position in the channel 201 by a clamping structure to form a foreign matter dropping structure. In order to form a locking structure for locking the chassis 1 in the channel 201, a connecting wall 101 is provided on the chassis 1, and the connecting wall 101 may be formed by two connecting wall structures which are arranged on the chassis 1 at a distance and oppositely, or may be a ring wall structure. The connecting wall 101 is connected with supporting bolts 3 through a threaded structure in an inserting manner, and the two supporting bolts 3 which are opposite to each other form the clamping structure acting on the inner wall of the channel 201; wherein the relative positioning means: referring to fig. 1, the central axes of the two stay bolts 3 mounted on the connecting wall 101 are preferably in a collinear configuration. Meanwhile, the two supporting bolts 3 jointly form a clamping structure acting on the inner wall of the channel 201, and the clamping structure is characterized in that: the threaded ends of the two supporting bolts 3 are inserted through the connecting wall 101 to abut against the inner wall of the channel 201, and the supporting bolts 3 on the left side and the right side are abutted against the inner wall of the channel 201, so that the chassis 1 is clamped in the channel 201, and a foreign matter falling prevention structure is formed.

Preferably, if the outer diameter of the disc is completely consistent with the inner diameter of the channel 201 of the flange 2, not only high machining precision is required, but also the installation is required to be accurately carried out; therefore, in the present embodiment, it is preferable that the outer diameter of the disk is slightly smaller than the inner diameter of the channel 201 of the flange 2. At this time, a certain gap will exist between the chassis 1 and the inner wall of the channel 201, and in order to form a better blocking structure in the channel 201 and eliminate the defect of the gap, the ring sleeve 4 with an elastic structure is additionally arranged in the embodiment; specifically, the ring set 4 is an elastic ring-shaped sleeve structure made of elastic structures such as rubber and silica gel. In particular, in order to smoothly mount the ring set 4, the connecting wall 101 is preferably an annular wall structure, i.e. an annular connecting wall; the ring sleeve 4 is sleeved on the outer ring of the annular wall, so that the annular wall is connected with the inner wall of the channel 201 through the ring sleeve 4; of course, the diameter of the outer contour of the ring set 4 should be slightly larger than the inner diameter of the channel 201, so that when the tool for preventing the foreign object from falling down is inserted into the channel 201, the ring set 4 in a contracted state exists between the ring wall and the inner wall of the channel 201 to block the channel 201, thereby preventing the foreign object from falling from the gap. Further, in order to avoid the situation that the ring set 4 is vertically offset on the connecting wall 101 during the insertion, in this embodiment, a receiving groove 1011 is disposed around the outer circumference of the ring wall, an opening of the receiving groove 1011 faces the inner wall of the channel 201, and the ring set 4 is sleeved in the receiving groove 1011.

Preferably, since the chassis 1 needs to be moved into the passage 201, in order to move the chassis 1, in this embodiment, a handle 102 is further included, and the handle 102 is disposed on the chassis 1 to form a holding structure when the chassis 1 is moved. Of course, the handle 102 may be screwed to the chassis 1, i.e. the handle 102 is preferably a screw rod and is connected to the chassis 1 through a screw connection structure; the handle 102 may also be an integrally formed structure provided on the chassis 1.

Preferably, when the handle 102 is screwed to the chassis 1, foreign materials may be gathered between the handle 102 and the chassis 1 to hinder the installation of the handle 102. Therefore, in this embodiment, the chassis 1 is provided with a protruding portion 103, and the handle 102 is screwed in the protruding portion 103; and a material collecting groove 104 is formed between the protruding part 103 and the connecting wall 101, and the material collecting groove 104 is used for accommodating foreign matters falling onto the chassis 1. Thus, the foreign matter falls into the trough 104, and the attachment of the handle 102 is not easily affected. Further, in order to optimize this effect of collecting the foreign matters in the trough 104, the guide surface 1013 is provided at the top end of the connecting wall 101 in this embodiment, and the guide surface 1013 is used to guide the foreign matters falling on the top of the connecting wall 101 to the chassis 1. Of course, when repairing the flange joint surface, referring to fig. 2, the handle 102 is screwed down to the bottom, so that the nut end of the screw is connected with the upper surface of the chassis 1, and thus, the foreign matter can be further prevented from being caught between the handle 102 and the chassis 1.

Preferably, additionally stated are: the supporting bolt 3 is propped against the inner wall of the channel 201 to form the clamping structure, so that the inner wall of the channel 201 is easily damaged; therefore, in this embodiment, the protection cover further includes a protection cover 5 having an elastic structure, that is, the protection cover 5 is an annular cover structure with elasticity and made of elastic structures such as rubber and silica gel. The protective sleeve 5 is sleeved on the outer ring of the annular wall, the mounting position of the protective sleeve 5 is matched with the mounting position of the supporting bolt 3, so that the supporting bolt 3 acts on the inner wall of the channel 201 through the protective sleeve 5, and the inner wall of the channel 201 can be prevented from being damaged while the clamping structure is not hindered. Further, in order to avoid the up-and-down deviation of the protecting jacket 5 on the connecting wall 101 during the insertion, in this embodiment, a mounting groove 1012 is provided around the periphery of the annular wall, an opening of the mounting groove 1012 faces the inner wall of the channel 201, and the protecting jacket 5 is sleeved in the mounting groove 1012.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. The utility model provides a prevent foreign matter instrument that drops for flange is restoreed which characterized in that: the method comprises the following steps:

the flange comprises a base plate (1), wherein part of the base plate (1) is of a disc structure, and the outer diameter of the disc is matched with the inner diameter of a channel (201) of a flange (2); the chassis (1) is covered in the circulation path of the channel (201) in a limiting way through a clamping structure so as to form a foreign matter falling prevention structure; screens structure includes connecting wall (101) and stay bolt (3), wherein:

the connecting wall (101) is arranged on the chassis (1), the supporting bolts (3) are connected to the connecting wall (101) in a penetrating mode through a threaded structure, and the two supporting bolts (3) which are opposite to each other form the clamping structure acting on the inner wall of the channel (201) together.

2. The foreign object fall prevention tool according to claim 1, characterized in that: the ring sleeve component (4) of an elastic structure is further included, and the connecting wall (101) is an annular wall; the ring sleeve piece (4) is sleeved on the outer ring of the annular wall, so that the annular wall is connected with the inner wall of the channel (201) through the ring sleeve piece (4).

3. The foreign object fall prevention tool according to claim 2, characterized in that: a containing groove (1011) is formed around the periphery of the annular wall, the opening of the containing groove (1011) faces the inner wall of the channel (201), and the annular sleeve piece (4) is sleeved in the containing groove (1011).

4. The foreign-body fall prevention tool according to claim 3, characterized in that: the chassis is characterized by further comprising a handle (102), wherein the handle (102) is arranged on the chassis (1) to form a holding structure when the chassis (1) moves.

5. The foreign object fall prevention tool according to claim 4, characterized in that: the handle (102) is screwed on the chassis (1).

6. The foreign object fall prevention tool according to claim 5, characterized in that: a boss (103) is arranged on the chassis (1), and the handle (102) is screwed in the boss (103); and a material collecting groove (104) is formed between the bulge part (103) and the connecting wall (101), and the material collecting groove (104) is used for accommodating foreign matters falling onto the chassis (1).

7. The foreign object fall prevention tool according to claim 4, characterized in that: the handle (102) is an integrally formed structure arranged on the chassis (1).

8. The foreign-body fall prevention tool according to any one of claims 2 to 7, characterized in that: the protective sleeve is characterized by further comprising a protective sleeve (5) of an elastic structure, the outer ring of the annular wall is sleeved with the protective sleeve (5), the mounting position of the protective sleeve (5) is matched with the mounting position of the supporting bolt (3), and the supporting bolt (3) acts on the inner wall of the channel (201) through the protective sleeve (5).

9. The foreign object fall prevention tool according to claim 8, characterized in that: a mounting groove (1012) is arranged around the periphery of the annular wall, the opening of the mounting groove (1012) faces the inner wall of the channel (201), and the protective sleeve (5) is sleeved in the mounting groove (1012).

10. The foreign-body fall prevention tool according to claim 9, characterized in that: the top end of the connecting wall (101) is provided with a guide surface (1013), and the guide surface (1013) is used for guiding the foreign matters falling on the top of the connecting wall (101) to the chassis (1).