Low-guided inner receiver front section assembly installation device

Abstract

The present invention discloses a low-guided casing front section assembly installation device in the field of casing assembly technology. The present invention changes the contact position of the pressing seat with the low-guided casing front section when pressing the low-guided casing front section, shortens the position difference between the first contact position and the second contact position in the radial direction of the low-guided casing front section, thereby preventing the low-guided casing front section from being deformed. At the same time, a mounting seat is provided on the pressing seat, and a guide groove is provided on the surface of the mounting seat. An impact rod is slidably fitted in the guide groove, so that the boss enters the moving path of the impact rod. Not only can the direction and impact position of the impact rod be limited by the guide groove, but the contact position of the pressing seat and the low-guided casing front section can also be made closer to the boss, which can improve the stability of the low-guided casing front section, so that the low-guided casing front section can provide effective support for the sealing ring during impact, thereby preventing cracks from occurring between the sealing ring and the metal felt, and improving the final product quality.

Description

Technical Field

[0001] The invention relates to the technical field of casing assembly, in particular to a low-guided casing front section assembly installation device. Background Art

[0002] The low-guide inner casing front section assembly is a typical thin-walled part, with the thinnest wall thickness of only 0.9mm. It is made of forged high-temperature alloy and consists of the low-guide inner casing front section (low-pressure guide inner casing front section) and the low-guide inner casing front section sealing ring assembly. The assembly relationship between the two parts is interference fit.

[0003] See also Figure 1-2 The front section of the low-guide inner receiver is annular, and the front section of the low-guide inner receiver includes a large head end and a small head end. The diameter of the small head end of the front section of the low-guide inner receiver is smaller than the diameter of the large head end of the front section of the low-guide inner receiver. A transition slope is provided between the small head end and the large head end. The sealing ring assembly of the front section of the low-guide inner receiver includes a sealing ring and a metal felt provided in the sealing ring. The sealing ring is also annular, and the outer diameter of the sealing ring matches the inner diameter of the small head end of the front section of the low-guide inner receiver. The sealing ring can enter the small head end of the front section of the low-guide inner receiver and form an interference fit with the small head end. In order to position the axial direction of the sealing ring Position, a circle of positioning ring is fixed on the side of the transition slope close to the small head end, and after the sealing ring is inserted into the small head end and abuts against the side of the positioning ring facing the small head end, the sealing ring reaches the installation position. In order to further fix the sealing ring, a number of bosses are installed on the side of the sealing ring facing the large head end, and a number of give way grooves are opened on the positioning ring, and an installation bevel is opened on the guide slope at a position adjacent to the give way groove, the boss can pass through the give way groove, and then the punch impacts the boss to make the boss deform and fit on the installation bevel, thereby completely fixing the sealing ring;

[0004] like Figure 3 As shown, during the installation of traditional sealing rings, workers use a handheld punch to impact the boss. The handheld punch will cause the contact position and angle of the punch to be different each time, making it difficult to ensure that the boss is completely fitted on the guide slope, resulting in a high proportion of defective products.

[0005] At the same time, before impacting the sealing ring, the front section of the low-guide inner receiver needs to be installed on the installation fixture. The traditional installation fixture includes a base and a pressing seat. The front section of the low-guide inner receiver is pressed on the base by the pressing seat to keep the front section of the low-guide inner receiver stable during the impact process. The base contacts the small head end, and the pressing seat is pressed on the side of the transition slope close to the large head end to fix the front section of the low-guide inner receiver on the base. However, this will make the contact position between the pressing seat and the front section of the low-guide inner receiver different from the bottom. There is a certain distance between the contact position of the seat and the low guide in the radial direction of the front section of the low guide inner receiver. Since the contact position of the pressing seat and the front section of the low guide inner receiver is farther away from the axis of the front section of the low guide inner receiver than the contact position of the base and the front section of the low guide inner receiver, when the pressing seat presses the front section of the low guide inner receiver, the guiding inclined surface and the side wall of the small head end of the front section of the low guide inner receiver may be deformed outward away from the axis, resulting in the front section of the low guide inner receiver being unable to effectively support the sealing ring.

[0006] At the same time, when the handheld punch strikes the boss, space needs to be left around the clearance groove for the operator to operate. In other words, the pressing seat cannot be directly pressed at the impact position, but needs to be rotated a certain angle to stagger with the impact position. As a result, when the boss of the sealing ring is impacted, the closer the position of the sealing ring is to the boss, the farther it is from the position where the pressing seat is pressed, resulting in the front section of the low-guide inner receiver being unable to provide effective support to the sealing ring.

[0007] A circle of metal felt is fixed on the inner ring of the sealing ring. In order to be able to deform, the sealing ring is made of a material with lower rigidity, while the metal felt has a higher hardness. During the impact of the boss, if the front section of the low-guided inner receiver cannot provide effective support for the main part of the sealing ring, then when the boss is deformed, the sealing ring and the adjacent position of the boss may also be deformed, causing cracks between the sealing ring and the metal felt.

[0008] Based on this, the present invention designs a low-guided inner casing front section assembly installation device to solve the above problems. Summary of the Invention

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a low-guided inner casing front section assembly installation device, used for installing a sealing ring in the low-guided inner casing front section, including a clamping unit and an impact unit; the clamping unit includes a base, a pull rod and a clamping seat, the base is used to abut against the small head end of the low-guided inner casing front section, the clamping seat is used to abut against the side of the inner cavity positioning ring of the low-guided inner casing front section facing away from the small head end of the low-guided inner casing front section, the pull rod is passed through the base and the clamping seat to apply a clamping force to the base and the clamping seat respectively, so as to press the low-guided inner casing front section against the bottom The impact unit includes a mounting seat and an impact rod slidably arranged on the mounting seat, the mounting seat is fixed to the top surface of the contact position between the pressing seat and the positioning ring, and a guide groove is provided on the mounting seat that passes through the top surface of the mounting seat and the bottom surface of the pressing seat. The opening size of the guide groove on the bottom surface of the pressing seat is larger than the cross-sectional size of the boss on the sealing ring, so that the boss on the sealing ring can enter the guide groove from the opening of the guide groove on the bottom surface of the pressing seat, and the impact rod slides in the guide groove along the length direction of the guide groove, and the length of the impact rod is larger than the length of the guide groove.

[0010] As a further solution of the present invention, there is a preset angle between the side of the clamping seat that is used to abut the positioning ring and the length direction of the guide groove, so that the impact rod can impact the boss perpendicular to the installation inclined surface in the front section of the low-guide inner casing, and the side of the impact rod that is used to contact the boss on the sealing ring is perpendicular to the length direction of the guide groove.

[0011] As a further solution of the present invention, a limit piece is provided at the upper end of the impact rod, and the projection of the limit piece in the length direction of the guide groove exceeds the projection of the guide groove in its own length direction. It is used to contact the surface of the mounting seat when the impact rod impacts the boss on the sealing ring to limit the stroke of the impact rod.

[0012] As a further solution of the present invention, in the length direction of the guide groove, the distance from the side of the mounting seat that is used to contact the limiter to the mounting inclined surface of the front section of the low guide inner casing is L1, the thickness of the boss on the sealing ring is L2, and the distance from the position where the limiter is used to contact the mounting seat to the bottom end of the impact rod is L3, L1-L2=L3, which prevents the impact rod from excessive impact while ensuring that the impact rod can impact the boss on the sealing ring into place.

[0013] As a further solution of the present invention, the surface of the clamping seat that contacts the inner cavity positioning ring of the front section of the low-guided inner casing is provided with an inner support platform for abutting against the inner ring surface of the inner cavity positioning ring of the front section of the low-guided inner casing.

[0014] As a further solution of the present invention, a slide rail is provided on the inner side of the guide groove along the length direction of the guide groove, and a slide groove is provided on the side of the impact rod that slides with the slide rail, so that the impact rod located in the guide groove has only the freedom to move along the length direction of the guide groove; or, a clamping block is installed on one side of the guide groove opening of the mounting seat 4, and the length of the clamping block in the length direction of the guide groove is less than the length of the guide groove, so that the impact rod located in the guide groove has only the freedom to move along the length direction of the guide groove.

[0015] As a further solution of the present invention, the clamping seat is in the shape of an elongated strip, and the length of the clamping seat is greater than the inner diameter of the inner cavity positioning ring of the front section of the low-guided inner casing and smaller than the outer diameter of the inner cavity positioning ring of the front section of the low-guided inner casing.

[0016] As a further solution of the present invention, the clamping seat includes a center seat and support legs arranged on the center seat at equal intervals, and the number of the support legs is the same as the number of bosses on the sealing ring; the end of the support leg away from the center seat is used to contact the inner cavity positioning ring of the front section of the low-guide inner receiver, and each support leg is provided with an impact unit at the end away from the center seat.

[0017] As a further solution of the present invention, an engaging block is fixed at one end of the pull rod, and an external thread for installing a nut is provided at the other end. The base and the pressing seat are pressed together by the nut and the engaging block to fix the front section of the low-guide inner receiver between the base and the pressing seat; an engaging groove matching the shape of the engaging block is provided on the side of the base facing away from the pressing seat, so that the engaging block can be hidden in the engaging groove.

[0018] As a further solution of the present invention, the cross-sectional shape of the engagement block is any shape except a circle; or, a screw is threadedly engaged on the engagement block, and an insertion slot for inserting the screw is provided in the engagement groove.

[0019] The present invention has the following beneficial effects:

[0020] The present invention changes the contact position of the pressing seat with the front section of the low-guide inner casing when the pressing seat presses the front section of the low-guide inner casing, shortens the position difference between the first contact position and the second contact position in the radial direction of the front section of the low-guide inner casing, thereby preventing the front section of the low-guide inner casing from being deformed. At the same time, a mounting seat is provided on the pressing seat, and a guide groove is provided on the surface of the mounting seat, and an impact rod is slidably fitted in the guide groove. The guide groove passes through the bottom surface of the pressing seat, and the opening size of the guide groove on the bottom surface of the pressing seat is larger than the cross-sectional size of the boss on the sealing ring, so that the boss on the sealing ring can enter the guide groove from the opening on the bottom surface of the pressing seat, and then the boss enters the moving path of the impact rod. Not only can the guide groove limit the direction and impact position of the impact rod, but also the contact position of the pressing seat and the front section of the low-guide inner casing can be closer to the boss, which can improve the stability of the front section of the low-guide inner casing, so that the front section of the low-guide inner casing can provide effective support for the sealing ring during impact, prevent cracks from occurring between the sealing ring and the metal felt, and improve the final product quality.

[0021] In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a structural diagram of the front section of the low-guided inner casing and the sealing ring.

[0024] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of part A.

[0025] Figure 3 This is a schematic diagram of the installation of a traditional compression seat.

[0026] Figure 4 It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 5 for Figure 4 An enlarged schematic diagram of part B.

[0028] Figure 6 for Figure 4 Enlarged schematic diagram of part C.

[0029] Figure 7 It is a structural schematic diagram of the compression seat in the present invention.

[0030] Figure 8 Schematic diagram of the structure of the impact unit in the present invention.

[0031] Figure 9 It is a structural schematic diagram of the guide groove in the present invention.

[0032] Figure 10 This is a first example schematic diagram of the compression seat in the present invention.

[0033] Figure 11 This is a second example diagram of a clamping seat that cannot be used.

[0034] Legend:

[0035] 1. Base; 12. Engaging groove; 2. Pull rod; 21. Engaging block; 22. Nut; 23. Screw; 3. Clamping seat; 31. Center seat; 32. Support foot; 33. Inner support platform; 4. Mounting seat; 41. Guide groove; 42. Clamping block; 5. Impact rod; 51. Limiting piece. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0037] like Figure 1-11 As shown, the present invention provides a low-guide inner casing front section assembly installation device, comprising a pressing unit for pressing the low-guide inner casing front section and an impact unit for impacting the boss on the sealing ring;

[0038] Among them, Figure 4 As shown, the pressing unit includes a base 1, a pull rod 2 and a pressing seat 3. The diameter of the base 1 is larger than the diameter of the small head end of the front section of the low-guide inner casing, so that the small head end of the front section of the low-guide inner casing can be abutted against the base 1, and then the pressing seat 3 is abutted against the side of the positioning ring facing away from the small head end. Finally, the base 1 and the pressing seat 3 are tightened by the pull rod 2, so that the front section of the low-guide inner casing is fixed between the base 1 and the pressing seat 3, as shown in FIG. Figure 4As shown, since the pressing seat 3 is in contact with the positioning ring of the front section of the low-guide inner casing at this time, the contact position between the pressing seat 3 and the front section of the low-guide inner casing is the first contact position, and the contact position between the base 1 and the front section of the low-guide inner casing is the second contact position. The position difference between the first contact position and the second contact position in the radial direction of the front section of the low-guide inner casing is reduced, and the contact position between the pressing seat 3 and the front section of the low-guide inner casing is closer to the axis of the front section of the low-guide inner casing, that is, when the pressing seat 3 is pressed on the positioning ring, it will apply a downward force to the positioning ring, and this force will cause the low-guide inner casing to move downward. The position where the front small head end and the guide bevel meet has a tendency to deform toward the axis of the front section of the low-guide inner receiver, which is opposite to the tendency of the traditional pressing seat 3 to cause the front section of the low-guide inner receiver to deform when pressing the front section of the low-guide inner receiver. Therefore, after the pressing seat 3 presses the front section of the low-guide inner receiver, the front section of the low-guide inner receiver is more difficult to deform during the process of the boss receiving the impact, which can provide effective support for the sealing ring. When impacting the boss, the probability of deformation of the sealing ring and the boss meeting the position can be reduced, thereby reducing the probability of cracks between the sealing ring and the metal felt, thereby improving the final product quality.

[0039] Among them, the impact unit includes a mounting seat 4 and an impact rod 5. The mounting seat 4 is fixedly arranged on the top surface of the pressing seat 3 and is above the contact position between the pressing seat 3 and the positioning ring. A guide groove 41 is opened on the mounting seat 4, and the guide groove 41 connects the top surface of the mounting seat 4 and the bottom surface of the pressing seat 3. The opening size of the guide groove 41 on the bottom surface of the pressing seat 3 is larger than the cross-sectional size of the boss on the sealing ring, and the opening position of the guide groove 41 on the bottom surface of the pressing seat 3 is located at the contact position between the pressing seat 3 and the positioning ring. That is to say, when the opening of the guide groove 41 on the bottom surface of the pressing seat 3 is aligned with the center of the give way groove opened on the positioning ring, the boss on the sealing ring can enter the guide groove 41 through the give way groove, and the cross-sectional shape of the impact rod 5 matches the opening shape of the guide groove 41, so that the impact rod 5 can be inserted into the guide groove 41 and slide along the length direction of the guide groove 41, that is, the boss can enter the sliding path of the impact rod 5. When the impact rod 5 is inserted into the guide groove 41, the impact rod 5 will exceed the top end of the guide groove 41, and the impact on the boss can be achieved by knocking the impact rod 5. The impact rod 5 can be limited by the guide groove 41, so that the contact position and angle of the impact rod 5 and the boss are the same each time the boss is impacted, which can improve the final boss installation effect and the quality of the overall parts. At the same time, since the guide groove 41 directly passes through the bottom surface of the pressing seat 3, the pressing seat 3 can directly press on both sides of the give way groove opened on the positioning ring, and it is closer to the force-bearing position of the front section of the low-guide inner casing during impact, which can improve the stability of the front section of the low-guide inner casing, so that the front section of the low-guide inner casing can provide effective support for the sealing ring during impact, prevent cracks from occurring between the sealing ring and the metal felt, and improve the final product quality.

[0040] Specifically, such as Figure 4 As shown, both the base 1 and the pressing seat 3 are provided with positioning holes that pass through from top to bottom. The diameter of the positioning holes matches the diameter of the pull rod 2. The base 1 and the pressing seat 3 are positioned by the pull rod 2 passing through the positioning holes provided in the base 1 and the pressing seat 3.

[0041] Specifically, such as Figure 10 As shown, the pressing seat 3 is long and has a length greater than the inner diameter of the positioning ring and smaller than the outer diameter of the positioning ring, so that the pressing seat 3 can be just pressed on the positioning ring through both ends, and the mounting seat 4 is installed at one end of the pressing seat 3. When working, the sealing ring is first installed in the inner cavity of the small head end of the front section of the low-guide inner casing, and the boss of the sealing ring passes through the give way groove of the positioning ring. Next, the small head end of the front section of the low-guide inner casing is prevented from being placed on the base 1, and then the pressing seat 3 is pressed on the positioning ring of the front section of the low-guide inner casing. When installing the pressing seat 3, it is necessary to align the opening of the guide groove 41 connecting the bottom surface of the pressing seat 3 with the give way groove so that the boss can enter the guide groove 41. Next, the pressing seat 3 is pulled by the pull rod 2. The front section of the low-guide inner receiver is tightened with the base 1 and the clamping seat 3 to fix it between the base 1 and the clamping seat 3. Finally, the boss is impacted by knocking the impact rod 5 to make the boss fit on the mounting bevel. Each time a boss is fit to the mounting bevel, the clamping seat 3 needs to be removed, and then the clamping seat 3 is rotated with the axis of the front section of the low-guide inner receiver as the rotation center, so that the guide groove 41 connected to the opening on the bottom surface of the clamping seat 3 is aligned with the new makeshift groove, and then the installation and impact steps of the clamping seat 3 are repeated until all the bosses are fit to the mounting bevel. The overall device structure is simple, and the installation method is the same as that of the traditional mounting fixture, so that the staff can adapt to the installation component more quickly, the learning cost is lower, and the problems of the traditional fixture are solved at a lower cost.

[0042] like Figure 11 As shown, another example of the pressing seat 3 is disclosed. In this example, the pressing seat 3 includes a center seat 31 and a plurality of legs 32 arranged at equal intervals on the side of the center. The number of the legs 32 is the same as the number of the bosses on the sealing ring, and the distance from the end of the leg 32 away from the center seat 31 to the axis of the center seat 31 is greater than the inner ring radius of the positioning ring and smaller than the outer ring radius of the positioning ring. Thus, the end of the leg 32 away from the center seat 31 can be pressed against the positioning ring to achieve the compression of the front section of the low-guide inner casing. In this example, the legs 3 The number of 2 is the same as the number of bosses on the sealing ring, that is, when installing the pressing seat 3, a plurality of legs 32 can be used to press on different makeshift grooves respectively, and a mounting seat 4 is provided at the end of the leg 32 away from the center seat 31. A guide groove 41 is provided on the mounting seat 4 and passes through the bottom surface of the leg 32. Then, the impact rod 5 can be inserted into the guide grooves 41 at different positions to impact the bosses at different positions. There is no need to frequently disassemble the pressing seat 3 and rotate it, making the overall device more convenient to use.

[0043] like Figure 5 As shown, in some examples, there is a preset angle between the side of the clamping seat 3 that is used to abut the positioning ring and the length direction of the guide groove 41, so that the impact rod 5 can impact the boss perpendicular to the mounting inclined surface in the front section of the low-guide inner casing, and the side of the impact rod 5 that is used to contact the boss on the sealing ring is perpendicular to the length direction of the guide groove 41. Therefore, the boss can be completely fitted on the mounting inclined surface by the impact rod 5 to improve the installation quality of the boss and increase the connection stability between the sealing ring and the front section of the low-guide inner casing.

[0044] like Figure 4 As shown, in some examples, a limiter 51 is provided at the upper end of the impact rod 5. The projection of the limiter 51 in the length direction of the guide groove 41 exceeds the projection of the guide groove 41 in its own length direction. The limiter 51 is used to contact the surface of the mounting seat 4 when the impact rod 5 impacts the upper boss of the sealing ring to limit the stroke of the impact rod 5, thereby preventing the impact rod 5 from over-impacting.

[0045] Specifically, in the length direction of the guide groove 41, as shown in FIG. Figure 8 As shown, the distance from the side of the mounting seat 4 that contacts the limiting member 51 to the mounting inclined surface of the front section of the low-guide inner casing is L1. Figure 5 As shown, the thickness of the boss on the sealing ring is L2. Figure 7 As shown, the distance from the position where the limiter 51 contacts the mounting seat 4 to the bottom end of the impact rod 5 is L3, and L1-L2=L3. That is to say, when the limiter 51 contacts the mounting seat 4, the distance between the bottom end of the impact rod 5 and the mounting bevel in the length direction of the guide groove 41 is just the same as the thickness of the boss. After the boss is fitted with the mounting bevel, the impact rod 5 will not be able to continue to impact the boss. While preventing the impact rod 5 from excessive impact, it can also ensure that the impact rod 5 can impact the boss on the sealing ring into place.

[0046] Figure 4 An example of a limiter 51 is shown. In this example, the limiter 51 is provided on one side of the impact rod 5 and is perpendicular to the length direction of the impact rod 5. When the impact rod 5 impacts, the limiter 51 can contact the top surface of the mounting seat 4 to limit the travel of the impact rod 5.

[0047] Specifically, the limiting member 51 is inserted into the mounting hole provided at the top end of the impact rod 5 , which facilitates subsequent replacement of the limiting member 51 .

[0048] like Figure 6 As shown, in some examples, the side of the pressing seat 3 that contacts the positioning ring is provided with an inner support platform 33, and the inner support platform 33 is used to abut against the inner ring surface of the positioning ring when the pressing seat 3 is pressed on the positioning ring to prevent the positioning ring from deforming downward.

[0049] like Figure 9 As shown, the guide groove 41 has three surfaces in an open state, because the guide groove 41 needs to be as close to the edge of the mounting seat 4 as possible;

[0050] Specifically, a slide groove is provided on the side of the impact rod 5, and a slide rail is fixedly provided at the corresponding position of the inner cavity of the guide groove 41. The impact rod 5 is restricted in the guide groove 41 through the cooperation of the slide rail and the slide groove, so that the impact rod 5 has only one degree of freedom to move along the length direction of the guide groove 41, thereby ensuring the stability of the impact rod 5 when impacting the boss.

[0051] Figure 8 Another installation example of the impact rod 5 is shown. In this example, a clamping block 42 is installed on one side of the mounting seat 4 having an opening of the guide groove 41. The clamping block 42 can close the opening on the side of the guide groove 41 so that the impact rod 5 can only move along the length direction of the guide groove 41, thereby limiting the freedom of the impact rod 5.

[0052] Figure 4 An example of installing a drawbar 2 is shown. In this example, an engaging block 21 is fixed to one end of the drawbar 2, and an external thread for mounting a nut 22 is provided at the other end. The nut 22 and the engaging block 21 compress the pressing seat 3 and the base 1 to fix the front section of the low-guide inner casing between the base 1 and the pressing seat 3.

[0053] An engaging groove 12 that matches the shape of the engaging block 21 is provided on the side of the base 1 facing away from the clamping seat 3, and the height of the engaging groove 12 is not less than the height of the engaging block 21, so that the engaging block 21 can be hidden in the engaging groove 12, so that the bottom surface of the base 1 is a flat surface and can be stably placed on the work surface.

[0054] Specifically, the cross-sectional shape of the engaging block 21 is any shape except a circle, or a screw 23 is threadedly engaged on the engaging block 21, and an insertion groove for inserting the screw 23 is provided in the engaging groove 12, so that the engaging block 21 cannot rotate after entering the engaging groove 12, making it convenient to tighten the compression seat 3 by the nut 22.

[0055] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A low-guide inner casing front section assembly installation device, used to install the sealing ring in the low-guide inner casing front section, characterized by: It includes a pressing unit and an impact unit; The clamping unit comprises a base (1), a pull rod (2) and a clamping seat (3), wherein the base (1) is used to abut against the small head end of the front section of the low-guide inner casing, and the clamping seat (3) is used to abut against the side of the inner cavity positioning ring of the front section of the low-guide inner casing that faces away from the small head end of the front section of the low-guide inner casing, and the pull rod (2) is provided in the base (1) and the clamping seat (3) to apply a clamping force to the base (1) and the clamping seat (3) respectively, so as to clamp the front section of the low-guide inner casing between the base (1) and the clamping seat (3); The impact unit includes a mounting seat (4) and an impact rod (5) slidably arranged on the mounting seat (4), the mounting seat (4) is fixed on the top surface of the contact position between the pressing seat (3) and the positioning ring, and a guide groove (41) is opened on the mounting seat (4) and passes through the top surface of the mounting seat (4) and the bottom surface of the pressing seat (3). The opening size of the guide groove (41) on the bottom surface of the pressing seat (3) is larger than the cross-sectional size of the boss on the sealing ring, so that the boss on the sealing ring can enter the guide groove (41) from the opening of the guide groove (41) on the bottom surface of the pressing seat (3). The cross-sectional shape of the impact rod (5) matches the opening shape of the guide groove (41), so that the impact rod (5) can be inserted into the guide groove (41) and slide along the length direction of the guide groove (41) to impact the boss, and the length of the impact rod (5) is larger than the length of the guide groove (41).

2. The low-guided inner casing front section assembly mounting device according to claim 1, characterized in that: The pressing seat (3) has a preset angle between the side thereof abutting against the positioning ring and the length direction of the guide groove (41), so that the impact rod (5) can impact the boss perpendicularly to the installation inclined surface in the front section of the low guide inner casing, and the side of the impact rod (5) in contact with the boss on the sealing ring is perpendicular to the length direction of the guide groove (41).

3. The low-guided inner casing front section assembly mounting device according to claim 1, characterized in that: A limiter (51) is provided at the upper end of the impact rod (5), wherein the projection of the limiter (51) in the length direction of the guide groove (41) exceeds the projection of the guide groove (41) in its own length direction, and is used to contact the surface of the mounting seat (4) when the impact rod (5) impacts the upper boss of the sealing ring to limit the stroke of the impact rod (5).

4. The low-guided inner casing front section assembly mounting device according to claim 3, characterized in that: In the longitudinal direction of the guide groove (41), the distance from the side of the mounting seat (4) for contacting the limiting member (51) to the mounting inclined surface of the front section of the low guide inner casing is L1, the thickness of the boss on the sealing ring is L2, and the distance from the position where the limiting member (51) is in contact with the mounting seat (4) to the bottom end of the impact rod (5) is L3, L1-L2=L3.

5. The low-guided inner casing front section assembly mounting device according to claim 1, characterized in that: The pressing seat (3) is provided with an inner support platform (33) on a side thereof for contacting the inner cavity positioning ring of the front section of the low-guide inner casing, and is used for abutting against the inner ring surface of the inner cavity positioning ring of the front section of the low-guide inner casing.

6. The low-guided inner casing front section assembly mounting device according to claim 1, characterized in that: A slide rail is provided on the inner side of the guide groove (41) along the length direction of the guide groove (41), and a slide groove is provided on the side of the impact rod (5) to slide with the slide rail, so that the impact rod (5) located in the guide groove (41) has only the freedom to move along the length direction of the guide groove (41); Alternatively, a pressing block (42) is mounted on one side of the mounting seat (4) having an opening of the guide groove (41), and the length of the pressing block (42) in the length direction of the guide groove (41) is smaller than the length of the guide groove (41), so that the impact rod (5) located in the guide groove (41) has only the freedom to move along the length direction of the guide groove (41).

7. The low-guided inner casing front section assembly mounting device according to claim 1, characterized in that: The pressing seat (3) is in the shape of an elongated strip, and the length of the pressing seat (3) is greater than the inner diameter of the inner cavity positioning ring of the front section of the low-guide inner casing and smaller than the outer diameter of the inner cavity positioning ring of the front section of the low-guide inner casing.

8. The low-guided inner casing front section assembly mounting device according to claim 1, characterized in that: The pressing seat (3) includes a center seat (31) and support legs (32) equidistantly arranged on the center seat (31), and the number of the support legs (32) is the same as the number of bosses on the sealing ring; One end of the support leg (32) away from the center seat (31) is used to contact the inner cavity positioning ring of the front section of the low-guide inner casing, and each support leg (32) is provided with an impact unit at one end away from the center seat (31).

9. The low-guided inner casing front section assembly mounting device according to claim 1, characterized in that: One end of the pull rod (2) is fixed with an engaging block (21), and the other end is provided with an external thread for installing a nut (22), and the nut (22) and the engaging block (21) are used to press the base (1) and the pressing seat (3) to fix the front section of the low-guide inner casing between the base (1) and the pressing seat (3); The base (1) is provided with an engagement groove (12) on a side facing away from the pressing seat (3) and matching the shape of the engagement block (21), so that the engagement block (21) can be hidden in the engagement groove (12).

10. The low-guided inner casing front section assembly mounting device according to claim 9, characterized in that: The cross-sectional shape of the engaging block (21) is any shape except a circle; Alternatively, a screw (23) is threadedly engaged on the engagement block (21), and a plug-in slot for inserting the screw (23) is provided in the engagement slot (12).

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