Dotting device for pipe die below DN100
By adopting a new support device structure in the pipe mold docking device below DN100, including 6210 centripetal ball bearings and intermediates, the problems of high damage frequency of small bearings and loose bolt connections are solved, and the goal of reducing costs and improving docking quality is achieved.
Patent Information
- Application Number
- CN202421673687.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-07-16
AI Technical Summary
In the existing pipe mold tapping devices below DN100, the small bearing damage frequency of the support device is high, resulting in high spare parts and labor costs, and loose bolt connections affecting the tapping quality.
A new support device structure is adopted, including a dot rod connection, 6210 centripetal ball bearing and intermediate. The outer ring of the bearing is rollingly connected to the inner surface of the pipe mold. The inner ring is clamped and positioned by the intermediate and dot rod connection, and the fastening bolts are cancelled.
It reduces the consumption and labor intensity of spare parts, reduces costs, improves the quality of handling and product qualification rate, and saves about 5,000 yuan in annual costs.
Smart Images
Figure CN222919955U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of electric mechanical equipment, and particularly relates to a dotting device for pipe molds with a diameter below DN100. Background Art
[0002] The pipe mold is a mold for producing ductile iron pipes and also the most important spare part in the production equipment. After the pipe mold has produced a certain number of ductile iron pipes, it must be repaired, and the repair quality directly affects the product quality of the cast pipes. Dotting is one of the important processes for the repair of water-cooled pipe molds. The principle is that compressed air drives the dotting head in the dotting device to hammer the inner wall of the rotating pipe mold at a high frequency. At the same time, the dotting device moves axially along the pipe mold, so that the dotting head can evenly punch out neatly arranged and regular pits on the inner wall of the pipe mold. The function is to eliminate the fatigue thermal stress generated during the use of the pipe mold, improve the surface strength, bridge micro-cracks, and increase the friction with the molten iron during pouring. The quality of dotting directly affects the product quality.
[0003] See Figure 1 , the existing dotting device consists of a dotting rod (1), a support device (2), and a dotting device (3, including a dotting head). The function of the support device is to support the entire dotting rod to prevent the dotting rod from becoming a cantilever beam and bending, resulting in the drooping of the dotting device part and affecting the dotting effect of the dotting head (5).
[0004] Currently, the support bearing (4) in the support device of the dotting device used for pipe molds (7) with a specification below DN100 in the cast pipe company is a radial ball bearing 6000 with an inner diameter of only 10 mm, which is supported between the pipe mold and the dotting rod. Since the dotting rod is relatively heavy (about 500 kg), this bearing bears a large force and has a high damage frequency during use. On average, 1 set of bearings needs to be replaced for every 2 small pipe molds dotted, resulting in high spare parts and labor costs. In addition, this support device also needs to be fixed on the dotting rod with bolts (6), and manual tightening is required. The bolts often become loose due to the vibration of the dotting head during use, resulting in a reduction in dotting quality and finally affecting the production efficiency and production quality of the water-cooled centrifuge. Content of the Utility Model
[0005] The purpose of the utility model is to provide a dotting device for pipe molds with a diameter below DN100, overcoming the deficiencies of the prior art. Aiming at the problems that the small bearings in the support device of the existing dotting device have a high damage frequency, resulting in high spare parts and labor costs, and the bolt connection becomes loose, affecting the dotting quality, the structure is improved to achieve the goals of reducing costs, improving productivity, and production quality.
[0006] To achieve the above purpose, the utility model is realized through the following technical solutions:
[0007] A dotting device for pipe molds below DN100, comprising a dotting rod, a support device and a dotting tool. The support device is connected between the dotting rod and the dotting tool. It is characterized in that the support device includes a dotting rod connecting piece, a bearing, an intermediate body and a dotting tool connecting piece. The dotting rod connecting piece is connected to the dotting rod by a thread, and the dotting tool connecting piece is fixedly connected to the dotting tool. The dotting rod connecting piece is connected to the dotting tool connecting piece through the intermediate body. A bearing is provided on the outer surface of the intermediate body. The outer ring of the bearing is in rolling connection with the inner surface of the pipe mold, and the inner ring of the bearing is clamped and positioned by the shoulder on the intermediate body and the dotting rod connecting piece.
[0008] The intermediate body is connected to the dotting rod connecting piece and the dotting tool connecting piece respectively by threads.
[0009] The model of the bearing is 6210 radial ball bearing.
[0010] The dotting tool is a pneumatic dotting tool or an electric dotting tool.
[0011] The specification of the pipe mold is below DN100.
[0012] The connection thread length between the dotting rod and the dotting rod connecting piece is not less than 20 mm.
[0013] The connection thread length between the intermediate body, the dotting rod connecting piece and the dotting tool connecting piece is not less than 20 mm.
[0014] Compared with the prior art, the beneficial effects of the present utility model are:
[0015] 1) This device completely changes the support structure, cancels the original 6000 small bearings and the two bolts that need to be tightened. This structure can reduce the consumption of spare parts and reduce the labor intensity, saving about 5000 yuan in cost per year;
[0016] 2) The dotting rod connecting piece and the dotting tool connecting piece are not easily damaged, so they do not need to be replaced frequently. The replacement frequency is greatly reduced compared with the bearing under the same working conditions, and the dotting quality is improved, thus ensuring the quality and efficiency of the production of small tube centrifuges. The qualified rate of the first pressure test of small tubes can reach more than 92%. Description of the Drawings
[0017] Figure 1 is a schematic structural diagram of a dotting device in the prior art;
[0018] Figure 2 is a schematic structural diagram of an embodiment of the present utility model.
[0019] In the figure: 1 - dotting rod, 2 - support device, 3 - dotting tool, 4 - bearing, 5 - dotting head, 6 - bolt, 7 - pipe mold, 8 - dotting rod connecting piece, 9 - dotting tool connecting piece, 10 - intermediate body. Detailed implementation mode
[0020] The technical solutions of the present utility model will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are some embodiments of the present utility model, rather than all embodiments.
[0021] In order to more clearly illustrate the specific implementation mode of the present utility model or the technical solutions in the prior art, the specific embodiments required for use in the description of the specific implementation mode or the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some implementation modes of the present utility model. For those of ordinary skill in the art, without creative efforts, other specific embodiments can also be obtained based on these specific embodiments.
[0022] Generally, the components of the embodiments of the present utility model described and shown in the specific embodiments here can be arranged and designed in countless different configurations. Therefore, the following detailed description of the embodiments of the present utility model provided in the specific embodiments is not intended to limit the scope of the present utility model to be protected, but only represents the selected embodiments of the present utility model.
[0023] See Figure 2 , which is a schematic structural diagram of an embodiment of a pipe mold dotting device with a diameter of less than DN100 of the present utility model, including a dotting rod 1, a support device 2, and a dotter 3. The support device 2 is connected between the dotting rod 1 and the dotter 3. The support device 2 includes a dotting rod connector 8, a bearing 4, an intermediate body 10, and a dotter connector 9. The dotting rod connector 8 is connected to the dotting rod 1 by a thread. The dotter connector 9 is fixedly connected to the dotter 3. The dotting rod connector 8 is connected to the dotter connector 9 through the intermediate body 10. The outer surface of the intermediate body 10 is provided with a bearing 4. The outer ring of the bearing 4 is in rolling connection with the inner surface of the pipe mold 7. The inner ring of the bearing 4 is clamped and positioned by the shoulder on the intermediate body 10 and the dotting rod connector 8. The outer ring of the bearing 4 is in direct contact with the pipe mold 7 as a support wheel and rotates under the drive of the rotating pipe mold 7.
[0024] The intermediate body 10 is respectively connected to the dotting rod connector 8 and the dotter connector 9 by threads. In order to ensure sufficient connection strength and avoid loosening during use, the connection thread length between the dotting rod 1 and the dotting rod connector 8 is not less than 20 mm. The connection thread lengths between the intermediate body 10, the dotting rod connector 8, and the dotter connector 9 are not less than 20 mm.
[0025] In the embodiment, the model of the bearing 4 is a 6210 radial ball bearing, which has sufficient strength and is not easily damaged. The dotter 3 can be any one of a pneumatic dotter or an electric dotter. Preferably, it is a pneumatic dotter. The pneumatic dotter has a simple structure, high strength, and is relatively durable. The applicable pipe mold 7 specification is less than DN100.
[0026] Compared with the support device of the original design, the structure of the support device in the embodiment of the present utility model is completely changed, and the original 6000 bearings and two bolts 6 that need to be fastened are cancelled. The dotting rod connecting piece 8 and the dotting device connecting piece 9 can be processed by oneself and are not easily damaged, so they do not need to be replaced frequently; the 6210 specification bearing has greater strength than the bearing 6000, and the replacement frequency is greatly reduced under the same working conditions, greatly reducing the consumption of spare parts and the labor intensity of workers; and because this device cancels the fastening bolts, the situation that the dotting quality is affected due to the loosening of the bolt connection is eliminated, thereby improving the dotting quality of small pipe types below DN100, indirectly improving the product qualification rate, and the application effect of this support device is good.
[0027] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model, and the scope of the present utility model is defined by the appended claims and their equivalents.
Claims
1. A dotting device for pipe molds below DN100, comprising a dotting rod, a supporting device and a dotting device, wherein the supporting device is connected between the dotting rod and the dotting device, and characterized in that: The supporting device includes a dotting rod connecting piece, a bearing, an intermediate body, and a dotting device connecting piece. The dotting rod connecting piece is connected to the dotting rod through a thread, and the dotting device connecting piece is fixedly connected to the dotting device. The dotting rod connecting piece is connected to the dotting device connecting piece through an intermediate body. A bearing is provided on the outer surface of the intermediate body. The outer ring of the bearing is rollingly connected to the inner surface of the pipe mold, and the inner ring of the bearing is clamped and positioned by the shoulder on the intermediate body and the dotting rod connecting piece.
2. A pipe mold spotting device below DN100 according to claim 1, characterized in that: The intermediate body is connected to the dotting rod connecting piece and the dotting device connecting piece respectively through threads.
3. A pipe mold spotting device below DN100 according to claim 1, characterized in that: The model of the bearing is 6210 radial ball bearing.
4. A pipe mold spotting device below DN100 according to claim 1, characterized in that: The dotting device is a pneumatic dotting device or an electric dotting device.
5. A pipe mold spotting device below DN100 according to claim 1, characterized in that: The pipe mold specification is below DN100.
6. A pipe mold spotting device below DN100 according to claim 1, characterized in that: The length of the connecting thread between the dot-marking rod and the dot-marking rod connecting piece is not less than 20 mm.
7. A pipe mold spotting device below DN100 according to claim 1, characterized in that: The length of the connecting thread between the intermediate body and the dotting rod connecting piece and the dotting device connecting piece is not less than 20 mm.