Connecting structure of abrasive disc and mounting seat

Abstract

The utility model discloses a connecting structure of an abrasive disc and a mounting seat, and relates to the technical field of pulping, the connecting structure comprises the abrasive disc and the mounting seat, a double-dovetail groove I is jointly formed between the abrasive disc and the mounting seat, and a double-dovetail pin I is inserted into the double-dovetail groove I in a clearance fit manner; a wedge opening I is vertically formed in the surface of the end, located in the double-dovetail groove I, of the double-dovetail pin I in a penetrating mode, and a wedge I used for expanding the double-dovetail pin I is inserted into the wedge opening I. The utility model solves the problems that when the double-dovetail pin is used for connecting the grinding disc with the pulping machine mounting seat or connecting the tooth surface layer and the back surface layer of the double-layer grinding disc, the matching precision requirement of the double-dovetail pin and the double-dovetail groove is high, and the integral processing, manufacturing, mounting and dismounting are difficult. And finally, the working efficiency and the working safety of the abrasive disc are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of refining, and in particular to a connection structure between a refining disc and a mounting seat. Background Art

[0002] Refiners, especially disc refiners, are widely used in pulping and papermaking, density board production, pharmaceuticals, tobacco, starch, pulp, nitrocellulose, seaweed, straw waste, rubber, plastics and other industries. The core component of the refiner is the grinding disc connected to the refiner mounting seat, which plays the role of impacting, squeezing and grinding the raw materials. Therefore, the grinding disc in the refiner has a large loss and often needs to be replaced. Moreover, since the grinding disc is generally an integral type, the entire grinding disc needs to be removed from the machine and scrapped when replacing the grinding disc, which makes the maintenance cost high and wastes resources seriously.

[0003] In this regard, some manufacturers have developed double-layer grinding discs, such as patent application CN215714248U, a combined grinding disc for a pulping machine, which can be split into a tooth surface layer with a rack and a circular back layer, and the tooth surface layer and the back layer are fixedly connected by bolts or screws to solve the problem that the entire grinding disc needs to be removed from the machine and scrapped when replacing the grinding disc. In addition, the grinding disc and the pulping machine mounting seat are also mostly connected by bolts or screws. However, the above-mentioned bolt connection method often has the following problems: First, after long-term use, the bolts or screws are prone to loosening or even falling off. For double-layer grinding discs, this will cause damage to the rack and even the grinding disc. For the grinding disc and the pulping machine mounting seat, this will affect the stability of the grinding disc connection installation, and ultimately affect the efficiency and safety of the grinding disc operation; second, it is necessary to use multiple bolts or screws, which often affects the flow properties of the slurry and even the pulping effect.

[0004] In response to the above problems, our company chose to use double dovetail pins instead of bolts or screws for connection. Although this structural design has solved the above problems to a certain extent, it is found in actual applications that the matching accuracy of the double dovetail pins and the dovetail grooves connected thereto is high, and the angle, width and depth requirements of the dovetail pins and the dovetail grooves are very high. The processing, manufacturing, installation and disassembly are difficult, so the improvement of the operating efficiency and safety of the grinding disc is still limited. For example, if the dovetail pin is too large, it cannot be inserted into the dovetail groove. If the dovetail pin is too small, there is a risk of loosening. After the dovetail pin and the dovetail groove are tightened, it is difficult to disassemble them again, which is time-consuming and labor-intensive.

[0005] In addition, a new technical solution is needed to solve the above technical problems. Summary of the invention

[0006] The purpose of the utility model is to provide a connection structure between a grinding disc and a mounting seat, so as to solve the technical problem in the prior art proposed in the above-mentioned background technology that when double dovetail pins are used to connect the grinding disc and the pulping machine mounting seat, or when the tooth surface layer and the back surface layer of a double-layer grinding disc are connected, the matching accuracy of the double dovetail pins and the double dovetail grooves is high, the overall processing, manufacturing, installation and disassembly are difficult, and ultimately the improvement of the operating efficiency and operating safety of the grinding disc is still limited.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A connection structure between a grinding disc and a mounting seat comprises a grinding disc and a mounting seat, wherein a double dovetail groove Ⅰ is formed between the grinding disc and the mounting seat, and a double dovetail pin Ⅰ is inserted into the double dovetail groove Ⅰ in a clearance-matched manner, wherein the double dovetail pin Ⅰ is an elastic pin, wherein the double dovetail pin Ⅰ is located in the middle position of one end surface of the double dovetail groove Ⅰ, a wedge opening Ⅰ is vertically penetrated through, and a wedge Ⅰ for expanding the double dovetail pin Ⅰ is inserted into the wedge opening Ⅰ, and a pulling hole Ⅰ is provided on the end surface of the double dovetail pin Ⅰ away from the wedge opening Ⅰ.

[0009] Furthermore, the double dovetail pin I is formed by an upper dovetail portion I which is a trapezoidal shape that is wide at the top and narrow at the bottom and an upper narrow lower dovetail portion I which is a trapezoidal shape that is wide at the top and wide at the bottom, the lower surface width of the lower dovetail portion I is greater than the upper surface width of the upper dovetail portion I, the height of the upper dovetail portion I is less than the height of the lower dovetail portion I, and the double dovetail groove I includes an upper dovetail groove I which is opened on the lower surface of the grinding disc and is compatible with the upper dovetail portion I, and a lower dovetail groove I which is opened on the mounting seat and is compatible with the lower dovetail portion I.

[0010] In addition to the above technical solutions, the utility model also provides a grinding disc, including a tooth surface layer and a back surface layer, wherein a double dovetail groove II is formed between the tooth surface layer and the back surface layer, and a double dovetail pin II is inserted into the double dovetail groove II in a clearance-matched manner, wherein the double dovetail pin II is an elastic pin, and the double dovetail pin II is located in the middle position of one end surface of the double dovetail groove II, and a wedge opening II is vertically penetrated therethrough, and a wedge II for expanding the double dovetail pin II is inserted into the wedge opening II, and a pulling hole II is provided on the end surface of the double dovetail pin II away from the wedge opening II.

[0011] Furthermore, the double dovetail pin II is formed by an upper dovetail portion II which is a trapezoidal shape that is wide at the top and narrow at the bottom and a lower dovetail portion II which is a trapezoidal shape that is narrow at the top and wide at the bottom, the lower surface width of the lower dovetail portion II is greater than the upper surface width of the upper dovetail portion II, the height of the upper dovetail portion II is less than the height of the lower dovetail portion II, and the double dovetail groove II includes an upper dovetail groove II which is opened on the lower surface of the tooth surface layer and is compatible with the upper dovetail portion II, and a lower dovetail groove II which is opened on the back surface layer and is compatible with the lower dovetail portion II.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. As for the connection between the grinding disc and the grinding machine mounting seat, the utility model utilizes the double dovetail pin Ⅰ and the double dovetail groove Ⅰ to realize the connection between the grinding disc and the mounting seat. At the same time, the double dovetail pin Ⅰ is inserted into the double dovetail groove Ⅰ through the clearance fit of the double dovetail pin Ⅰ, so that the double dovetail pin Ⅰ can be easily inserted into the double dovetail groove Ⅰ, which is convenient for the installation of the double dovetail pin Ⅰ and even the entire grinding disc, and effectively reduces the precision requirements of the double dovetail pin Ⅰ and the double dovetail groove Ⅰ, which is convenient for processing and manufacturing. On this basis, a wedge opening Ⅰ is vertically penetrated on the surface of one end of the double dovetail pin Ⅰ located in the double dovetail groove Ⅰ, and a wedge Ⅰ for expanding the double dovetail pin Ⅰ is inserted into the wedge opening Ⅰ. The matching setting not only greatly improves the grinding disc and the grinding machine, but also greatly improves the installation of the double dovetail pin Ⅰ and the double dovetail groove Ⅰ. The stability and reliability of the connection installation of the mounting seat also greatly facilitates the removal and replacement of the double dovetail pin I and even the entire grinding disc, that is, through the synergistic effect of the wedge I and the wedge mouth I of the double dovetail pin I, the double dovetail pin I and the double dovetail groove I can be transformed into an interference fit, thereby tightly locking the grinding disc and the mounting seat. When the double dovetail pin I needs to be removed, it is only necessary to dig out the wedge I, and the interference fit between the double dovetail pin I and the double dovetail groove I will return to a clearance fit, thereby facilitating the removal of the double dovetail pin I and even the disassembly of the entire grinding disc. Ultimately, while greatly improving the operating safety of the grinding disc, the replacement efficiency of the grinding disc on the mounting seat is improved, thereby fully improving the operating efficiency of the grinding disc.

[0014] 2. As for the connection between the tooth surface layer and the back layer of the double-layer grinding disc, the utility model uses the double dovetail pin II and the double dovetail groove II to realize the connection between the tooth surface layer and the back layer. At the same time, the double dovetail pin II is inserted into the double dovetail groove II through the clearance of the double dovetail pin II, so that the double dovetail pin II can be easily inserted into the double dovetail groove II, which is convenient for the installation of the double dovetail pin II and even the entire grinding disc, and effectively reduces the precision requirements of the double dovetail pin II and the double dovetail groove II, which is convenient for processing and manufacturing. On this basis, a wedge II is vertically penetrated on the surface of one end of the double dovetail pin II located in the double dovetail groove II, and a wedge II for expanding the double dovetail pin II is inserted into the wedge II. The cooperation setting not only greatly improves the connection between the tooth surface layer and the back layer The stability and reliability of the installation also greatly facilitates the extraction of the double dovetail pin II, that is, the removal and replacement of the tooth surface layer and the back layer, that is, through the coordinated action of the wedge II and the wedge mouth II of the double dovetail pin II, the double dovetail pin II and the double dovetail groove II can be transformed into an interference fit, thereby tightly locking the tooth surface layer and the back layer. When the double dovetail pin II needs to be removed, it is only necessary to dig out the wedge II, and the interference fit between the double dovetail pin II and the double dovetail groove II will return to a clearance fit, thereby facilitating the separation of the double dovetail pin II, that is, the tooth surface layer and the back layer. Ultimately, while greatly improving the operating safety of the grinding disc, the replacement efficiency of the grinding disc when replacing the tooth surface layer or the back layer is improved, thereby fully improving the operating efficiency of the grinding disc.

[0015] 3. In the utility model, the double dovetail pin I is configured as an elastic pin, so that the double dovetail pin I has elasticity and plasticity, allowing a loose clearance fit with a larger clearance. The double dovetail pin I can have a larger clearance with the double dovetail groove I, thereby further facilitating the installation of the double dovetail pin I and even the entire grinding disc, and further reducing the precision requirements of the double dovetail pin I and the double dovetail groove I, facilitating processing and manufacturing. At the same time, this configuration also allows the wedge mouth I to rebound and shrink smoothly when the wedge I needs to be dug out for removing the double dovetail pin I, thereby further facilitating the removal of the double dovetail pin I and even the entire grinding disc, and further improving the replacement efficiency of the grinding disc on the mounting seat; in addition, the matching configuration of the pulling hole I can also further facilitate the removal of the double dovetail pin I and even the entire grinding disc.

[0016] 4. In the utility model, the double dovetail pin II is configured as an elastic pin, so that the double dovetail pin II has elasticity and plasticity, allowing a loose clearance fit with a larger clearance. The double dovetail pin II can have a larger clearance with the double dovetail groove II, thereby further facilitating the installation of the double dovetail pin II and even the entire grinding disc, and further reducing the precision requirements of the double dovetail pin II and the double dovetail groove II, facilitating processing and manufacturing. At the same time, this configuration also allows the wedge mouth II to rebound and shrink smoothly when the wedge II needs to be dug out for removing the double dovetail pin II, thereby further facilitating the removal of the double dovetail pin II, i.e., the separation of the tooth surface layer and the back layer, and further improving the replacement efficiency when the tooth surface layer or the back layer of the grinding disc is replaced; in addition, the matching configuration of the pulling hole II can also further facilitate the removal of the double dovetail pin II, i.e., the separation of the tooth surface layer and the back layer.

[0017] 5. In the utility model, the wedge opening Ⅰ is arranged in the middle position of the corresponding end surface, which fully ensures the stability and reliability of the wedge Ⅰ when acting in the double dovetail pin Ⅰ, thereby further improving the stability and reliability of the connection and installation between the grinding disc and the mounting seat, and improving the operating safety of the grinding disc.

[0018] 6. In the utility model, the wedge opening II is arranged in the middle position of the corresponding end surface, which fully ensures the stability and reliability of the wedge II when acting in the double dovetail pin II, thereby further improving the stability and reliability of the connection installation between the tooth surface layer and the back layer of the double-layer grinding wheel, and improving the operating safety of the grinding wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the working principle of Example 1 of the utility model;

[0020] Figure 2 The structure diagram of the double dovetail pin Ⅰ of the utility model is shown in FIG. Figure 1 ;

[0021] Figure 3 The structure diagram of the double dovetail pin Ⅰ of the utility model is shown in FIG. Figure 2 ;

[0022] Figure 4 This is a schematic diagram of the working principle of wedge I of the utility model;

[0023] Figure 5 This is a schematic diagram of the working principle of Embodiment 2 of the present utility model;

[0024] Figure 6 The structure diagram of the double dovetail pin II of the utility model is shown in FIG. Figure 1 ;

[0025] Figure 7 The structure diagram of the double dovetail pin II of the utility model is shown in FIG. Figure 2 ;

[0026] Figure 8 This is a schematic diagram of the working principle of wedge II of the utility model;

[0027] In the figure: 1, grinding disc, 2, mounting seat, 3, double dovetail groove Ⅰ, 31, upper dovetail groove Ⅰ, 32, lower dovetail groove Ⅰ, 4, double dovetail pin Ⅰ, 41, upper dovetail part Ⅰ, 42, lower dovetail part Ⅰ, 5, wedge mouth Ⅰ, 6, wedge Ⅰ, 7, pulling hole Ⅰ, 8, tooth surface layer, 9, back layer, 10, double dovetail groove Ⅱ, 101, upper dovetail groove Ⅱ, 102, lower dovetail groove Ⅱ, 11, double dovetail pin Ⅱ, 111, upper dovetail part Ⅱ, 112, lower dovetail part Ⅱ, 12, wedge mouth Ⅱ, 13, wedge Ⅱ, 14, pulling hole Ⅱ. DETAILED DESCRIPTION

[0028] The following examples are used to further illustrate the content of the utility model, but do not limit the application of the utility model. Example

[0029] See also Figure 1 to Figure 4, which shows a connection structure of a grinding disc and a mounting seat, comprising a grinding disc 1 (in this embodiment, a grinding disc 1 Φ720mm full-circle grinding disc is selected), a mounting seat 2 and a double dovetail pin Ⅰ4, an upper dovetail groove Ⅰ31 with an inverted trapezoidal structure that is wide at the top and narrow at the bottom is provided on the lower surface of the grinding disc 1, a lower dovetail groove Ⅰ32 with a trapezoidal structure that is narrow at the top and wide at the bottom is provided at a position on the mounting seat 2 that is opposite to the upper dovetail groove Ⅰ31 (in this embodiment, the lower dovetail groove Ⅰ32 vertically penetrates the mounting seat 2), the upper dovetail groove Ⅰ31 and the lower dovetail groove Ⅰ32 are combined to form a double dovetail groove Ⅰ3, and the double dovetail pin Ⅰ4 is inserted into the double dovetail groove Ⅰ3 to connect them to form a loose clearance fit with a clearance of 0.6mm (the double dovetail pin Ⅰ4 and the connection thereto) The number of double dovetail grooves Ⅰ3 connected can be set as needed, and the position can be set at the inner edge or outer edge of the grinding plate 1), the double dovetail pin Ⅰ4 is an elastic pin (it can be made of low-cost and durable carbon steel, nylon, aluminum and other materials, with elasticity and plasticity, allowing loose clearance fit with a larger gap), the double dovetail pin Ⅰ4 is located in the middle position of one end surface of the double dovetail groove Ⅰ3 and is penetrated by a wedge opening Ⅰ5, the wedge opening Ⅰ5 is vertically arranged and a wedge Ⅰ6 for expanding it is inserted inside (the functions and structures of conventional components such as wedges are well known in the art, and the connection settings are also common knowledge, so no further explanation is given here, and it is not shown in detail in the accompanying drawings), and the other end surface of the double dovetail pin Ⅰ4 is provided with a pulling hole Ⅰ7.

[0030] Furthermore, the double dovetail pin Ⅰ4 is formed by an upper dovetail portion Ⅰ41 which is trapezoidal in shape and wide at the top and narrow at the bottom and a lower dovetail portion Ⅰ42 which is trapezoidal in shape and narrow at the top and wide at the bottom, the height of the upper dovetail portion Ⅰ41 is smaller than the height of the lower dovetail portion Ⅰ42, and the upper surface width of the upper dovetail portion Ⅰ41 is smaller than the lower surface width of the lower dovetail portion Ⅰ42, thereby avoiding the loosening of the double dovetail pin Ⅰ44 during operation to a certain extent.

[0031] The working principle and process of this embodiment are as follows:

[0032] The wedge Ⅰ6 is inserted into the wedge opening Ⅰ5, so that one end of the double dovetail pin Ⅰ4 located in the double dovetail groove Ⅰ3 expands, and an interference fit is formed between the double dovetail pin Ⅰ4 and the double dovetail groove Ⅰ3, thereby locking the grinding disc 1 and the mounting seat 2.

[0033] When it is necessary to remove the double dovetail pin Ⅰ4, it is only necessary to dig out the wedge Ⅰ6 first, so that the wedge mouth Ⅰ5 rebounds and shrinks, and the interference fit between the double dovetail pin Ⅰ4 and the double dovetail groove Ⅰ3 can be loosened and converted into a clearance fit. Here, after screwing the bolt into the pulling hole Ⅰ7, the double dovetail pin Ⅰ4 can be easily pulled out using a puller. Example

[0034] See also Figures 5 to 8, which shows a grinding disc (in this embodiment, a Φ1066mm fan-shaped split grinding disc is selected), including a tooth surface layer 8 (the basic structure such as the rack on the tooth surface layer of the existing grinding disc is not specifically described here, nor is it shown in detail in the accompanying drawings, but its function should not be limited thereto), a back layer 9 and a double dovetail pin II 11, the lower surface of the tooth surface layer 8 is provided with an upper dovetail groove II 101 with an inverted trapezoidal structure that is wide at the top and narrow at the bottom, and a lower dovetail groove II 102 with a trapezoidal structure that is narrow at the top and wide at the bottom is provided on the back layer 9 at a position opposite to the upper dovetail groove II 101 (in this embodiment, the lower dovetail groove II 102 vertically penetrates the back layer 9), the upper dovetail groove II 101 and the lower dovetail groove II 102 are combined to form a double dovetail groove II 10, and the double dovetail pin II 11 is inserted into the double dovetail groove II 10 to connect them to form a 1mm Loose clearance fit of the gap (the number of double dovetail pins Ⅱ 11 and the double dovetail grooves Ⅱ 10 connected thereto can be set according to needs, and the position can be set at the inner edge or outer edge of the tooth surface layer 8), the double dovetail pin Ⅱ 11 is an elastic pin (low-cost and durable carbon steel, nylon, aluminum and other materials can be used, with elasticity and plasticity, allowing loose clearance fit of a larger gap), the double dovetail pin Ⅱ 11 is located in the double dovetail groove Ⅱ 10. A wedge mouth Ⅱ 12 is opened through the middle position of the surface of one end thereof. The wedge mouth Ⅱ 12 is vertically arranged and a wedge Ⅱ 13 for expanding it is inserted inside (the functions and structures of conventional components such as wedges are well known in the art, and the connection settings are also common knowledge, so no further explanation is given here, and it is not shown in detail in the accompanying drawings), and a pulling hole Ⅱ 14 is opened on the other end surface of the double dovetail pin Ⅱ 11.

[0035] Furthermore, the double dovetail pin II11 is formed by an upper dovetail portion II111 which is a trapezoidal shape that is wide at the top and narrow at the bottom and an upper dovetail portion II112 which is a trapezoidal shape that is narrow at the top and wide at the bottom. The height of the upper dovetail portion II111 is smaller than the height of the lower dovetail portion II112, and the upper surface width of the upper dovetail portion II111 is smaller than the lower surface width of the lower dovetail portion II112, thereby avoiding the loosening of the double dovetail pin II11 during operation to a certain extent.

[0036] The working principle and process of this embodiment are as follows:

[0037] The wedge Ⅱ13 is inserted into the wedge opening Ⅱ12, so that one end of the double dovetail pin Ⅱ11 located in the double dovetail groove Ⅱ10 expands, and an interference fit is formed between the double dovetail pin Ⅱ11 and the double dovetail groove Ⅱ10, thereby locking the tooth surface layer 8 and the back surface layer 9.

[0038] When it is necessary to remove the double dovetail pin Ⅱ11, it is only necessary to dig out the wedge Ⅱ13 first, so that the wedge mouth Ⅱ12 rebounds and shrinks, and the interference fit between the double dovetail pin Ⅱ11 and the double dovetail groove Ⅱ10 can be loosened and converted into a clearance fit. Here, after screwing the bolt into the pulling hole Ⅱ14, the double dovetail pin Ⅱ11 can be easily pulled out using a puller.

Claims

1. A connection structure between a grinding plate and a mounting seat, comprising a grinding plate and a mounting seat, characterized in that: A double dovetail groove Ⅰ is formed between the grinding disc and the mounting seat, and a double dovetail pin Ⅰ is inserted into the double dovetail groove Ⅰ in a clearance-matched manner. A wedge opening Ⅰ is vertically penetrated on one end surface of the double dovetail pin Ⅰ located in the double dovetail groove Ⅰ, and a wedge Ⅰ for expanding the double dovetail pin Ⅰ is inserted into the wedge opening Ⅰ.

2. The connection structure between a grinding disc and a mounting seat according to claim 1, characterized in that: The double dovetail pin I is an elastic pin.

3. The connection structure between a grinding disc and a mounting seat according to claim 1, characterized in that: The double dovetail pin I is formed by an upper dovetail portion I which is a trapezoidal shape that is wide at the top and narrow at the bottom and a lower dovetail portion I which is a trapezoidal shape that is narrow at the top and wide at the bottom, the lower surface width of the lower dovetail portion I is greater than the upper surface width of the upper dovetail portion I, and the height of the upper dovetail portion I is less than the height of the lower dovetail portion I.

4. The connection structure between a grinding disc and a mounting seat according to claim 3, characterized in that: The double dovetail groove I comprises an upper dovetail groove I matched with the upper dovetail portion I, and a lower dovetail groove I matched with the lower dovetail portion I. The upper dovetail groove I is arranged on the lower surface of the grinding disc, and the lower dovetail groove I is arranged on the mounting seat.

5. The connection structure between a grinding disc and a mounting seat according to claim 1, characterized in that: The wedge opening I is arranged at the middle position of the corresponding end surface, and a pulling hole I is arranged on the surface of one end of the double dovetail pin I which is away from the wedge opening I.

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