Machine shell shaft seal flange welding tool

Abstract

The utility model relates to the field of centrifugal fans, in particular to a machine shell shaft seal flange welding tool which comprises a rod body, connecting block bodies are fixed to the two ends of the rod body respectively, and positioning taper holes coaxial with the rod body are formed in the faces, away from the rod body, of the connecting block bodies. A detachable positioning conical head is arranged in the positioning conical hole, the positioning conical head is matched with the positioning conical hole in an embedded mode, a positioning disc is arranged at the tail end of the positioning conical head, and a plurality of shaft seal flange connecting holes are annularly formed in the positioning disc around the disc center. The welding precision of the sealing flange can be effectively improved, and a foundation is provided for high-quality operation of equipment; meanwhile, for fan production in a hard sealing mode, the machining link after the whole machine shell is welded is omitted, and the machining cost can be effectively reduced; in addition, for fan production in a soft sealing mode, the welding procedure of the shaft seal flange is transferred to be completed in a factory from a site, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to centrifugal fan field especially relates to a casing shaft seal flange welding tool. BACKGROUND

[0002] In the structural design of the centrifugal fan casing, the driving end and the non-driving end are provided with flanges for installing shaft seal, and the flange has extremely strict process standards in the riveting and welding process of the casing. The coaxiality and parallelism with the center of the casing must be accurately controlled, which is the key prerequisite for ensuring the smooth installation of the shaft seal during the total assembly of the machine.

[0003] For the fan using soft sealing mode, some customers tend to weld the shaft seal flange in the on-site installation process. For the fan using mechanical seal or carbon ring seal and other hard sealing forms with extremely high leakage control requirements, the precision requirement of the shaft seal flange is more stringent. In general, the fan with such hard seal needs to be precisely machined after the casing is welded, but due to the generally large size of the fan casing, high requirements are put forward for the specifications and performance of the processing equipment, which further leads to a substantial increase in the manufacturing cost of the casing. SUMMARY

[0004] Based on the above problems, the utility model aims at providing a casing shaft seal flange welding tool, which adopts the following technical scheme:

[0005] The utility model provides a casing shaft seal flange welding tool, which comprises a rod body, both ends of the rod body are fixed with connecting blocks, a positioning conical hole coaxial with the rod body is arranged on one side of the connecting block away from the rod body, a positioning conical head that can be disassembled and assembled is arranged in the positioning conical hole, the positioning conical head is embeddedly matched with the positioning conical hole, a positioning disc is arranged at the tail end of the positioning conical head, and a plurality of shaft seal flange connecting holes are arranged in a ring around the disc center on the positioning disc.

[0006] Preferably, a mounting through hole penetrating the end part is arranged at the center of the positioning conical head, a threaded hole communicating with the tip of the positioning conical hole is arranged at the center of the connecting block, a long bolt is arranged at the tail end of the positioning conical head, and the long bolt is threadedly connected with the threaded hole through the mounting through hole.

[0007] Preferably, the connecting block is connected with the outer wall of the positioning conical head through a clamping structure on the side end face close to the positioning conical hole.

[0008] Preferably, the clamping structure comprises an anti-rotation clamping groove arranged at the end part of the connecting block and an anti-rotation protruding block arranged on the outer wall of the positioning conical head, and the anti-rotation protruding block is embeddedly and clampingly matched with the anti-rotation clamping groove.

[0009] Preferably, the hollow structure of the rod body is a circular tube.

[0010] Preferably, the tail end of the positioning conical head is provided with an extension section, and an axial adjusting limiting piece is arranged on the extension section and abuts against the centrifugal fan shell.

[0011] Preferably, the limiting piece is threadedly connected with the extension section.

[0012] Preferably, the limiting piece comprises a connecting sleeve, the connecting sleeve is threadedly connected with the extension section, and two stop levers are arranged on the outer wall of the connecting sleeve and abut against the centrifugal fan shell.

[0013] Compared with the prior art, the beneficial technical effects of the utility model are:

[0014] The utility model can effectively improve the sealing flange welding precision, provides the basis for the high quality operation of equipment, meanwhile, for the fan production of hard sealing form, the machining link after the overall welding of shell is saved, the processing cost can be effectively reduced, in addition, for the fan production of soft sealing mode, the welding procedure of shaft sealing flange is transferred from the field to the factory to be completed, and the production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model will be further described in connection with the drawings.

[0016] Figure 1 It is main view cutaway view of machine shell shaft sealing flange welding tool in the embodiment one of the utility model;

[0017] Figure 2 It is structural schematic view of positioning disc in the embodiment one of the utility model;

[0018] Figure 3 It is disassembled state schematic view of connecting block body and positioning conical head in the embodiment one of the utility model;

[0019] Figure 4 It is clamping state schematic view of connecting block body and positioning conical head in the embodiment one of the utility model;

[0020] Figure 5 It is side view structural schematic view of centrifugal fan shell in the embodiment one of the utility model;

[0021] Figure 6 It is Figure 1 cutaway view in C-C direction;

[0022] Figure 7 It is main view cutaway view of machine shell shaft sealing flange welding tool in the embodiment two of the utility model;

[0023] Figure 8 This is a schematic diagram of the limiting component in Embodiment 2 of this utility model;

[0024] Figure 9 This is a schematic diagram of the contact fit between the limiting component and the centrifugal fan casing in Embodiment 2 of this utility model.

[0025] Explanation of reference numerals in the attached drawings: 1. Rod body; 2. Connecting block; 201. Positioning conical hole; 202. Threaded hole; 3. Positioning conical head; 301. Mounting through hole; 4. Positioning plate; 5. Long bolt; 6. Snap-fit ​​structure; 601. Anti-rotation slot; 602. Anti-rotation protrusion; 7. Extension section; 8. Limiting component; 801. Connecting sleeve; 802. Stop bar; 9. Centrifugal fan housing; 901. Shaft seal support sleeve; 10. Shaft seal flange. Detailed Implementation

[0026] To make the technical problems, technical solutions and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0027] Example 1

[0028] like Figure 1 and 2 As shown, this embodiment discloses a housing shaft seal flange welding fixture, including a rod 1, with connecting blocks 2 welded to both ends of the rod 1. The connecting blocks 2 have a positioning conical hole 201 coaxial with the rod 1 on the side facing away from the rod 1. A detachable positioning conical head 3 is provided in the positioning conical hole 201. The positioning conical head 3 is embedded in the positioning conical hole 201. A positioning disk 4 is provided at the tail end of the positioning conical head 3. Several shaft seal flange connecting holes 101 are arranged in a ring around the center of the positioning disk 4.

[0029] The positioning conical head 3 needs to be fixed after being inserted into the positioning conical hole 201. In this embodiment, one possible method for fixing the positioning conical head 3 is as follows: Figure 3 As shown, the center of the positioning conical head 3 is provided with a through-hole 301 that extends through the end, and the center of the connecting block 2 is provided with a threaded hole 202 that communicates with the tip of the positioning conical hole 201; the tail end of the positioning conical head 3 is provided with a long bolt 5, which passes through the through-hole 301 and is threadedly connected to the threaded hole 202.

[0030] In this embodiment, the connecting block 2 is connected to the outer wall of the positioning cone head 3 via a snap-fit ​​structure 6 on its end face near the positioning cone hole 201. The snap-fit ​​structure 6 prevents the positioning cone head 3 from rotating circumferentially after it is fixed. Figure 4As shown, the snap-fit ​​structure 6 includes an anti-rotation slot 601 provided at the end of the connecting block 2, and an anti-rotation protrusion 602 provided on the outer wall of the positioning cone head 3. The anti-rotation protrusion 602 and the anti-rotation slot 601 are embedded and snap-fitted together.

[0031] In this embodiment, the rod 1 is a hollow circular tube.

[0032] like Figure 5 and 6 As shown, the working principle of this utility model is as follows: the positioning conical head 3 is inserted into the positioning conical hole 201 and fixed by the long bolt 5, and the snap-fit ​​structure 6 snaps the two together.

[0033] The shaft seal flange 10 is processed separately according to the dimensions in the drawing. The shaft seal flange 10 (which consists of two halves) is then precisely installed onto the positioning plates 4 at both ends of the housing shaft seal flange welding fixture. The shaft seal flange 10 is then fixed by the shaft seal flange connection holes 101 of the bolt assembly. Hoist the tooling, along with the shaft sealing flange 10, into the lower half of the centrifugal fan casing 9, ensuring that the shaft sealing flanges 10 at both ends of the tooling are positioned within the shaft sealing support sleeves 901 of the centrifugal fan casing 9 (the shaft sealing support sleeve 901 consists of two halves, with the shaft sealing flanges 10 placed in the lower half). Then, assemble the upper and lower halves of the centrifugal fan casing 9 together (i.e., assemble the two halves of the shaft sealing support sleeve 901 to form a complete shaft sealing support sleeve 901). Adjust the axial position of the shaft sealing flange 10 within the shaft sealing support sleeve 901. Once the position is adjusted, weld the shaft sealing flange 10 to the shaft sealing support sleeve 901 (i.e., weld the two halves of the shaft sealing flange 10 to the two halves of the shaft sealing support sleeve 901 one-to-one). After the shaft sealing flange 10 is welded, disassemble the upper half of the centrifugal fan casing 9, and the entire tooling can be removed.

[0034] It should be noted that the centrifugal fan casing 9, the adjusting shaft seal flange 10, and the shaft seal support sleeve 901 are all composed of two halves, a structure known to those skilled in the art.

[0035] In addition, in this embodiment, the positioning conical head 3 and the positioning conical hole 201 are quickly positioned by the conical surface. This allows for the setting of multiple positioning conical heads 3 of the same size, with a positioning disk 4 of the corresponding specification fixed on each positioning conical head 3. Thus, the specification and size of the positioning disk 4 can be quickly changed by simply replacing the positioning conical head 3, while ensuring a high degree of coaxiality, which greatly improves the flexibility and versatility of the tooling.

[0036] Example 2

[0037] As can be seen from the working principle of the tooling in Embodiment 1, after the shaft seal flange 10 is placed into the shaft seal support sleeve 901, it is necessary to adjust the axial position of the shaft seal flange 10 in the shaft seal support sleeve 901. During welding, it is essential to ensure that the circumferential position of the shaft seal flange 10 does not move. Therefore, in this embodiment, as... Figures 7 to 9 As shown, an integrally formed extension section 7 is provided at the tail end of the positioning cone head 3. An axially adjustable limiting member 8 is provided on the extension section 7. The limiting member 8 abuts against the shaft seal support sleeve 901 on the centrifugal fan housing 9.

[0038] In this embodiment, the limiting member 8 is threadedly connected to the extension section 7. Specifically, the limiting member 8 includes a connecting sleeve 801, which is threadedly connected to the extension section 7. Two stop rods 802 are provided on the outer wall of the connecting sleeve 801. The stop rods 802 are in contact with the shaft seal support sleeve 901. The two stop rods 802 can be arranged coaxially.

[0039] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A welding fixture for a housing shaft seal flange, characterized in that, The device includes a rod body (1), with connecting blocks (2) fixed at both ends. The connecting blocks (2) have a positioning conical hole (201) coaxial with the rod body (1) on the side facing away from the rod body (1). A detachable positioning conical head (3) is provided in the positioning conical hole (201). The positioning conical head (3) is embedded in the positioning conical hole (201). A positioning disk (4) is provided at the tail end of the positioning conical head (3). Several shaft sealing flange connection holes (101) are arranged in a ring around the center of the disk on the positioning disk (4).

2. The welding fixture for the housing shaft seal flange according to claim 1, characterized in that: The center of the positioning cone head (3) is provided with a through hole (301) that extends through the end, and the center of the connecting block (2) is provided with a threaded hole (202) that communicates with the tip of the positioning cone hole (201); the tail end of the positioning cone head (3) is provided with a long bolt (5), which passes through the through hole (301) and is threadedly connected to the threaded hole (202).

3. The welding fixture for the housing shaft seal flange according to claim 1, characterized in that: The connecting block (2) is connected to the outer wall of the positioning cone head (3) via a snap-fit ​​structure (6) on the end face near the positioning cone hole (201).

4. The welding fixture for the housing shaft seal flange according to claim 3, characterized in that: The snap-fit ​​structure (6) includes an anti-rotation slot (601) provided at the end of the connecting block (2) and an anti-rotation protrusion (602) provided on the outer wall of the positioning cone head (3). The anti-rotation protrusion (602) and the anti-rotation slot (601) are embedded and snap-fitted together.

5. The welding fixture for the housing shaft seal flange according to claim 1, characterized in that: The rod (1) is a hollow circular tube.

6. The welding fixture for the housing shaft seal flange according to claim 1, characterized in that: The tail end of the positioning cone head (3) is provided with an extension section (7), and the extension section (7) is provided with an axially adjustable limiting member (8), which abuts against the centrifugal fan casing (9).

7. The welding fixture for the housing shaft seal flange according to claim 6, characterized in that: The limiting member (8) is threadedly connected to the extension section (7).

8. The welding fixture for the housing shaft seal flange according to claim 7, characterized in that: The limiting component (8) includes a connecting sleeve (801), which is threadedly connected to the extension section (7). Two stop bars (802) are provided on the outer wall of the connecting sleeve (801), and the stop bars (802) are in contact with the centrifugal fan casing (9).

9. The welding fixture for the housing shaft seal flange according to claim 8, characterized in that: The two stops (802) are arranged on the same axis.

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