Flange connecting assembly and roll crusher

Abstract

The utility model relates to the technical field of equipment connecting and assembling, in particular to a flange connecting assembly and a roll crusher. The flange connecting assembly comprises a pair of first clamping pieces, a pair of second clamping pieces and a fastening assembly. The pair of first clamping pieces are arranged in the first opposite directions of the rectangular flanges respectively, first clamping grooves are formed in the first clamping pieces, and the first clamping grooves can clamp and fix the first side edges of the two butted rectangular flanges; the pair of second clamping pieces are arranged in the second opposite directions of the rectangular flanges respectively, second clamping grooves are formed in the second clamping pieces, and the second clamping grooves are used for clamping and fixing the second side edges of the two butted rectangular flanges; and the fastening assembly is used for connecting the first clamping piece and the second clamping piece, so that the first clamping piece and the second clamping piece connect and fix the two butted rectangular flanges. According to the flange connecting assembly, rapid butt joint sealing of the rectangular flanges can be achieved, and the equipment assembling efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of equipment connection and assembly, and in particular to a flange connection assembly and a double-roll crusher. Background Art

[0002] In the field of new energy, double-roll crushers are often used in the battery material production process to crush sintered battery raw materials into specified particle sizes.

[0003] The structure of the double-roll crusher includes a feed bin, a crushing bin, etc. Among them, the feed bin connects the upper part of the crushing bin with the upstream equipment, and the lower part of the crushing bin is used to connect with the downstream equipment. The corresponding connections must be sealed reliably, otherwise powder leakage will occur and pollute the environment. The connection between the feed bin and the upstream equipment and the crushing bin is generally a rectangular flange structure, with a gasket between the flanges, and the two devices are connected together by a bolt connection pair. In order to maintain its reliable sealing, a large number of bolt connection pairs are generally used, making the upper and lower parts of the feed bin difficult to install and disassemble, and inefficient. Utility Model Content

[0004] The present application provides a flange connection assembly and a double-roll crusher. The flange connection assembly can realize rapid docking and sealing of rectangular flanges, thereby improving equipment assembly efficiency.

[0005] In a first aspect, the present application provides a flange connection assembly, comprising:

[0006] A pair of first clamping members are disposed at first opposite sides of the rectangular flanges, the first clamping members are provided with first clamping grooves, and the first clamping grooves are used to clamp and fix the first side edges of the two butted pairs of rectangular flanges;

[0007] A pair of second clamping members are disposed on second opposite sides of the rectangular flanges, the second clamping members are provided with second clamping grooves, and the second clamping grooves are used to clamp and fix the second side edges of the two butted pairs of rectangular flanges;

[0008] The fastening assembly connects and fastens the first clamping member and the second clamping member so that the first clamping member and the second clamping member are fixed relative to the rectangular flange.

[0009] In some embodiments, the second clamping member is provided with a connecting pin hole, and the fastening assembly comprises:

[0010] A connecting pin shaft is connected to two ends of the first clamping member and passes through the connecting pin hole, and an end of the connecting pin shaft away from the first clamping member is provided with an external thread;

[0011] The first locking nut cooperates with the external thread of the connecting pin and is used to press the second clamping member against the second side of the rectangular flange.

[0012] In some embodiments, the size of the connecting pin hole along the length direction of the second clamp is larger than the diameter of the connecting pin shaft, and tightening screw holes are provided at both ends of the second clamp, and the axial direction of the tightening screw holes coincides with the length direction of the second clamp; the fastening assembly includes:

[0013] A clamping screw is threadably matched with the clamping screw hole and is used to pass through the clamping screw hole and abut against the side surface of the connecting pin shaft to clamp a pair of the first clamping members against the first side edge of the rectangular flange.

[0014] In some embodiments, a strip-shaped limiting groove is provided on a side of the connecting pin shaft facing the clamping screw hole, and the end of the clamping screw abuts against the strip-shaped limiting groove.

[0015] In some embodiments, the width of the first card slot and / or the second card slot is gradually reduced from the slot opening to the slot bottom.

[0016] In some embodiments, the length of the first slot is greater than or equal to half the length of the first side of the rectangular flange.

[0017] In a second aspect, the present application provides a double-roll crusher, comprising a feed bin, a crushing bin and a flange connection assembly as described in any one of the above, wherein the upper part of the feed bin, the lower part of the feed bin and the upper part of the crushing bin are all provided with a rectangular flange;

[0018] The rectangular flange at the top of the feed bin and the rectangular flange of the upstream equipment are connected via the flange connection assembly; the rectangular flange at the bottom of the feed bin and the rectangular flange at the top of the crushing bin are connected via the flange connection assembly.

[0019] In some embodiments, the side wall of the feed bin is provided with a flip-opening and closing observation window, and the first side of the observation window is connected to the feed bin via a hinge mechanism;

[0020] A locking baffle is provided on the second side of the observation window, and a locking groove is formed through the locking baffle. The feed bin is provided with a hinged locking mechanism that cooperates with the locking baffle. After the hinged locking mechanism rotates into the locking groove, the locking baffle is pressed against the feed bin.

[0021] In some embodiments, the articulation mechanism comprises:

[0022] a first hinge pin connected to a first side of the feed bin;

[0023] A first hinge bolt, a first end of which is provided with a first hinge pin hole adapted to the first hinge pin shaft, and a second end of which is provided with an external thread;

[0024] A pair of adjusting nuts cooperate with the external threads of the second end of the first hinge bolt to clamp and fix the first side of the observation window to the second end of the first hinge bolt.

[0025] In some embodiments, the hinge locking mechanism comprises:

[0026] A second hinge pin connected to the second side of the feed bin;

[0027] A second hinge bolt, a first end of which is provided with a second hinge pin hole adapted to the second hinge pin shaft, and a second end of which is provided with an external thread;

[0028] The second locking nut cooperates with the external thread of the second end of the second hinge bolt and is used to press the locking baffle against the feed bin.

[0029] The above-mentioned technical scheme provided by the embodiment of the present application has the following advantages compared with the prior art: when it is necessary to connect two components to be connected, such as a feed bin and an upstream device or a feed bin and a crushing bin, through a rectangular flange, firstly, the two rectangular flanges of the two components to be connected are butt-jointed, and then a pair of first clamps are clamped to the first opposite sides of the two butted rectangular flanges through a first clamping groove, and then a pair of second clamps are clamped to the second opposite sides of the two butted rectangular flanges through a second clamping groove, and finally, the first clamps and the second clamps are connected and fixed by a fastening assembly. Compared with the rectangular flanges being assembled by multiple bolts and nuts in the circumferential direction, the assembly or disassembly efficiency is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0032] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0033] Figure 1 An exploded view of a flange connection assembly provided in an embodiment of the present application;

[0034] Figure 2A working principle diagram of a flange connection assembly provided in an embodiment of the present application;

[0035] Figure 3 for Figure 2 A partial cross-sectional view of the connection between the second clamp and the rectangular flange;

[0036] Figure 4 A schematic diagram of a double-roll crusher provided in an embodiment of the present application;

[0037] Figure 5 for Figure 4 A stepped cross-sectional view of the middle observation window and the feed bin cut at the hinge mechanism and the hinge locking mechanism respectively;

[0038] Figure 6 for Figure 5 Enlarged view of part A in the middle;

[0039] Figure 7 for Figure 5 Enlarged view of part B in .

[0040] Description of reference numerals:

[0041] 10-upstream equipment; 20-rectangular flange; 21-first sealing gasket;

[0042] 30-feeding bin; 31-observation window; 32-second sealing pad; 33-locking baffle;

[0043] 40-flange connection assembly; 41-first clamp; 42-connecting pin; 43-connecting pin hole; 44-first locking nut; 45-second clamp; 46-second clamping groove; 47-pressing screw hole; 48-pressing screw;

[0044] 50-crushing chamber; 60-downstream equipment;

[0045] 70-hinged mechanism; 71-first hinge pin; 72-first hinge bolt; 73-adjusting nut;

[0046] 80 - hinged locking mechanism; 81 - second hinge pin; 82 - second hinge bolt; 83 - second locking nut. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0048] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0049] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0050] In order to solve the technical problem of low assembly efficiency of equipment such as a double-roll crusher connected via a rectangular flange 20 in the prior art, the present application provides a flange connection assembly 40 that can improve the assembly efficiency of equipment connected via the rectangular flange 20.

[0051] like Figures 1 to 3 As shown, the flange connection assembly 40 provided in the embodiment of the present application includes a pair of first clamps 41, a pair of second clamps 45 and a fastening assembly; the pair of first clamps 41 are arranged at the first opposite side of the rectangular flange 20, and the first clamps 41 are provided with a first clamping groove, and the first clamping groove can clamp and fix the first side edges of the two butted rectangular flanges 20; a pair of second clamps 45 are arranged at the second opposite side of the rectangular flange 20, and the second clamps 45 are provided with a second clamping groove 46, and the second clamping groove 46 is used to clamp and fix the second side edges of the two butted rectangular flanges 20; the fastening assembly is used to connect the first clamp 41 and the second clamp 45, so that the first clamp 41 and the second clamp 45 connect and fix the two butted rectangular flanges 20.

[0052] The first clamp 41 can be as follows: Figure 1 As shown in the horizontal arrangement, the second clamp 45 can be as Figure 1Arranged longitudinally, the first clamping groove is provided on the inner side of the first clamping member 41, i.e., the side facing the rectangular flange 20, and the second clamping groove 46 is provided on the inner side of the second clamping member 45, i.e., the side facing the rectangular flange 20. When a pair of first clamping members 41 and a pair of second clamping members 45 are respectively clamped on the outer peripheries of the two butted rectangular flanges 20, the first clamping member 41 and the second clamping member 45 are connected and fixed by the fastening assembly, so that the flange connection assembly 40 is realized to quickly clamp and fix the two butted rectangular flanges 20.

[0053] When it is necessary to connect two components to be connected, such as the feed bin 30 and the upstream equipment 10 or the feed bin 30 and the crushing bin 50, through the rectangular flange 20, firstly, the rectangular flanges 20 of the two components to be connected are docked, and then a pair of first clamps 41 are clamped to the first pair of first sides of the two docked rectangular flanges 20 through the first clamping groove, and then a pair of second clamps 45 are clamped to the second pair of second sides of the two docked rectangular flanges 20 through the second clamping groove 46, and finally the first clamp 41 and the second clamp 45 are connected and fixed by the fastening assembly, that is, the two docked rectangular flanges 20 are connected and fixed by the flange connection assembly 40; compared with the rectangular flange 20 being assembled by multiple bolts and nuts in the circumferential direction, the assembly or disassembly efficiency is significantly improved. Here, there is no restriction on the structure of the fastening assembly, as long as the connection and fixation of the first clamp 41 and the second clamp 45 can be achieved, so that the first clamp 41 and the second clamp 45 are fixed on different sides of the rectangular flange 20, it is applicable to the present application, and the structure of the fastening assembly will be exemplarily described in combination with specific embodiments below.

[0054] In some embodiments, the length of the second clamp 45 and the second clamping groove 46 is greater than the length of the second side of the rectangular flange 20 to be connected, and the second clamp 45 is provided with a connecting pin hole 43 near the two ends, and the connecting pin hole 43 passes through the bottom of the second clamping groove 46 along the extension direction of the first clamp 41. The fastening assembly includes a connecting pin 42 and a first locking nut 44, and the connecting pin 42 is respectively connected to the two ends of the length direction of the first clamp 41. The connecting pin 42 is provided with an external thread away from the first clamp 41, and the connecting pins 42 at both ends of the first clamp 41 can be connected to a pair of second clamps 45 through the connecting pin holes 43 on a pair of second clamps 45, and then the first locking nut 44 cooperates with the external thread of the connecting pin 42, so that the first locking nut 44 can squeeze the second clamp 45, and press the pair of second clamps 45 on the second side of the rectangular flange 20, so as to achieve the connection and sealing of the second sides of the two butted rectangular flanges 20. To ensure reliability of the first clamping member 41 in connecting and fixing the first sides of the two butted rectangular flanges 20 , the length of the first clamping groove, ie, the first clamping member 41 , is usually greater than or equal to half the length of the first side of the rectangular flanges 20 to be connected.

[0055] At this time, it should be noted that the spacing between the two connecting pin holes 43 on the second clamp 45 should be able to enable the pair of first clamps 41 to be pressed against the first side edges of the two butted rectangular flanges 20, thereby connecting and sealing the first side edges of the two butted rectangular flanges 20. During the assembly process, the pair of first clamps 41 are first pressed against the first side edges of the two butted rectangular flanges 20 through the first clamping grooves, and then the pair of second clamps 45 are connected to the connecting pin shafts 42 on the first clamps 41 through the connecting pin holes 43, and finally the pair of second clamps 45 are locked against the second side edges of the rectangular flanges 20 by means of the first locking nuts 44.

[0056] When the fastening assembly only includes a connecting pin 42 and a first locking nut 44, one person is required to first clamp the first clamp 41 on the first side of the two butting rectangular flanges 20 and keep it clamped, and the other person connects the second clamp 45 to the connecting pin 42 of the first clamp 41 through the connecting pin hole 43. There are certain inconveniences in assembly. The embodiment of the present application further optimizes the structure of the fastening assembly, and specific reference is made to the following embodiments.

[0057] In this embodiment, the connecting pin hole 43 has a preset size along the length direction of the second clamp 45, and the preset size is larger than the diameter of the connecting pin shaft 42, so that the connecting pin shaft 42 can slide along the connecting pin hole 43 in the length direction of the second clamp 45 after being inserted into the connecting pin hole 43, that is, the spacing between the pair of first clamps 41 can be adjusted. The two ends of the second clamp 45 are also provided with a clamping screw hole 47, and the axial direction of the clamping screw hole 47 coincides with the length direction of the second clamp 45; at this time, the fastening assembly also includes a clamping screw 48, which is threadedly matched with the clamping screw hole 47 and can pass through the clamping screw hole 47 to abut against the side of the connecting pin shaft 42, that is, by screwing the clamping screw 48, the connecting pin shaft 42 can be driven to slide in the connecting pin hole 43 along the length direction of the second clamp 45, thereby pressing the first clamp 41 on the first side of the two butted rectangular flanges 20.

[0058] The advantage of such a configuration is that the first clamping member 41 and the second clamping member 45 can be connected into a frame structure, and then the first locking nut 44 and the clamping screw 48 can be tightened respectively to realize the first clamping member 41 to press the first side of the rectangular flange 20 and the second clamping member 45 to clamp the second side of the rectangular flange 20, and a single person can complete the assembly work. More importantly, the flange connection assembly 40 has better adaptability and can connect and fix rectangular flanges 20 of different sizes.

[0059] In some embodiments, a strip limiting groove is further provided on the side of the connecting pin 42 corresponding to the clamping screw hole 47. The length direction of the strip limiting groove coincides with the axial direction of the connecting pin 42, that is, coincides with the length direction of the first clamping component 41. The width of the strip limiting groove matches the size of the clamping screw 48, so that the end of the clamping screw 48 abuts against the strip limiting groove to drive the connecting pin 42 to slide in the connecting pin hole 43 along the length direction of the second clamping component 45.

[0060] Combined with reference Figure 3 In some embodiments, the second clamping groove 46 is configured as an inverted trapezoidal structure with a groove width gradually decreasing from the groove opening to the groove bottom, the width of the groove opening is greater than the sum of the thickness of the second side edges of the two butted rectangular flanges 20 and the first sealing gasket 21, and the width of the groove bottom is less than the sum of the thickness of the second side edges of the two butted rectangular flanges 20 and the first sealing gasket 21. In this way, the second clamping member 45 can be buckled on the second side edges of the two butted rectangular flanges 20 through the second clamping groove 46, and with the help of the guiding effect of the side wall of the second clamping groove 46, the second clamping member 45 is buckled and pressed on the second side edges of the two butted rectangular flanges 20 during the process of tightening the first locking nut 44.

[0061] Similarly, the first slot (not shown in the drawings) can also be set to an inverted trapezoidal structure in which the slot width gradually decreases from the slot mouth to the slot bottom, and the width of the slot mouth is greater than the sum of the thickness of the first side edges of the two butt-jointed rectangular flanges 20 and the first sealing gasket 21, and the width of the slot bottom is less than the sum of the thickness of the first side edges of the two butt-jointed rectangular flanges 20 and the first sealing gasket 21.

[0062] like Figure 4 As shown, the embodiment of the present application also provides a double-roll crusher, including a feed bin 30, a crushing bin 50 and the flange connection assembly 40 provided in the above embodiment. Among them, the upper part of the feed bin 30 is used to dock with the upstream device 10, the crushing bin 50 is connected to the lower part of the feed bin 30, and the lower part of the crushing bin 50 is used to dock with the downstream device 60. The upper part of the feed bin 30, the lower part of the feed bin 30 and the upper part of the crushing bin 50 are all provided with a rectangular flange 20, and the upstream device 10 and the downstream device 60 are also provided with a rectangular flange 20; the rectangular flange 20 at the upper part of the feed bin 30 and the rectangular flange 20 of the upstream device 10 are connected and fixed by the above flange connection assembly 40. The rectangular flange 20 at the lower part of the feed bin 30 and the rectangular flange 20 at the upper part of the crushing bin 50 are connected and fixed by the above flange connection assembly 40. The rectangular flange 20 at the lower part of the crushing bin 50 and the rectangular flange of the downstream device 60 are connected and fixed by the above flange connection assembly 40. The double-roll crusher achieves butt assembly of the rectangular flanges 20 between different components through the flange connection assembly 40, which significantly improves assembly efficiency compared to using multiple bolts and nuts.

[0063] In order to facilitate the observation of the material feeding situation of the feed bin 30, the feed bin 30 is usually provided with an observation window 31, which can be flipped open and closed relative to the side wall of the feed bin 30, so that when abnormal situations such as blockage occur in the feed bin 30, the observation window 31 can be opened for cleaning and abnormal processing. In order to realize the opening and closing of the observation window 31, the first side of the observation window 31 is hinged to the feed bin 30 through at least two sets of hinge mechanisms 70; the second side of the observation window 31 is provided with a locking baffle 33, and the locking baffle 33 is penetrated by a locking groove, and the corresponding position of the feed bin 30 is provided with a hinged locking mechanism 80, and the hinged locking mechanism 80 can be rotated toward or away from the locking baffle 33. When the hinged locking mechanism 80 is rotated to be engaged with the locking groove, the locking baffle 33 is pressed tightly against the feed bin 30, thereby realizing the closed sealing of the observation window 31; in order to improve the sealing of the observation window 31, a second sealing gasket 32 ​​is provided between the door panel of the observation window 31 and the side wall opening of the feed bin 30.

[0064] The hinge mechanism 70 provided in one embodiment of the present application is as follows Figures 4 to 6 As shown, the hinge locking mechanism 80 includes a first hinge pin 71, a first hinge bolt 72 and a pair of adjusting nuts 73. The first hinge pin 71 is fixed to the first side of the side wall of the feed bin 30, the first end of the first hinge bolt 72 is provided with a first hinge pin hole, and the second end is provided with an external thread, the first hinge bolt 72 is rotatably connected to the first hinge pin 71 through the hinge pin hole at the first end, a pair of adjusting nuts 73 are matched and connected with the external thread at the second end of the first hinge bolt 72, the first side of the observation window 31 is connected to the second end of the first hinge bolt 72 and is clamped and fixed by the pair of adjusting nuts 73, and the spacing between the observation window 31 and the side wall of the feed bin 30 can be adjusted by changing the position of the adjusting nut 73, so that the second sealing pad 32 has a certain amount of compression to meet the sealing requirements of the observation window 31. And the way in which the observation window 31 is connected to the first hinge bolt 72 by the adjusting nut 73 is convenient for replacing the hinge mechanism 70 when the hinge mechanism 70 is damaged or deformed.

[0065] An articulated locking mechanism 80 provided in an embodiment of the present application is as follows: Figure 4 , Figure 5 and Figure 7As shown, the hinge locking mechanism includes a second hinge pin 81, a second hinge bolt 82, and a second locking nut 83. The second hinge pin 81 is connected to the second side of the side wall of the feed bin 30 and is adjacent to the second side of the observation window 31; the first end of the second hinge bolt 82 is provided with a second hinge pin hole, and the second hinge bolt 82 is rotatably connected to the second hinge pin 81 through the second hinge pin hole, so that the second hinge bolt 82 can be rotated into or out of the locking groove of the locking baffle 33. The second end of the second hinge bolt 82 is provided with an external thread, and the second locking nut 83 is connected to the second end of the second hinge bolt 82. After the second hinge bolt 82 rotates into the locking groove of the locking baffle 33, the locking baffle 33 is compressed by tightening the second locking nut 83, thereby maintaining the appropriate deformation of the second sealing gasket 32 ​​and keeping the observation window 31 in a good sealing state.

[0066] It should be understood that the terms used in the text are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used in the text may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described in the text are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0067] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0068] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A flange connection assembly, characterized in that: include: A pair of first clamping members are disposed at first opposite sides of the rectangular flanges, the first clamping members are provided with first clamping grooves, and the first clamping grooves are used to clamp and fix the first side edges of the two butted pairs of rectangular flanges; A pair of second clamping members are disposed on second opposite sides of the rectangular flanges, the second clamping members are provided with second clamping grooves, and the second clamping grooves are used to clamp and fix the second side edges of the two butted pairs of rectangular flanges; The fastening assembly connects and fastens the first clamping member and the second clamping member so that the first clamping member and the second clamping member are fixed relative to the rectangular flange.

2. The flange connection assembly according to claim 1, characterized in that: The second clamping member is provided with a connecting pin hole, and the fastening assembly comprises: A connecting pin shaft is connected to two ends of the first clamping member and passes through the connecting pin hole, and an end of the connecting pin shaft away from the first clamping member is provided with an external thread; The first locking nut cooperates with the external thread of the connecting pin and is used to press the second clamping member against the second side of the rectangular flange.

3. The flange connection assembly according to claim 2, characterized in that: The size of the connecting pin hole along the length direction of the second clamp is larger than the diameter of the connecting pin shaft, and tightening screw holes are provided at both ends of the second clamp, and the axial direction of the tightening screw holes coincides with the length direction of the second clamp; the fastening assembly comprises: A clamping screw is threadably matched with the clamping screw hole and is used to pass through the clamping screw hole and abut against the side surface of the connecting pin shaft to clamp a pair of the first clamping members against the first side edge of the rectangular flange.

4. The flange connection assembly according to claim 3, characterized in that: A strip-shaped limiting groove is provided on one side of the connecting pin shaft facing the clamping screw hole, and the end of the clamping screw abuts against the strip-shaped limiting groove.

5. The flange connection assembly according to any one of claims 1 to 4, characterized in that: The width of the first card slot and / or the second card slot is gradually reduced from the slot opening to the slot bottom.

6. The flange connection assembly according to claim 1, characterized in that: The length of the first slot is greater than or equal to half the length of the first side of the rectangular flange.

7. A double roll crusher, characterized in that: It comprises a feed bin, a crushing bin and the flange connection assembly according to any one of claims 1 to 6, wherein the upper part of the feed bin, the lower part of the feed bin and the upper part of the crushing bin are all provided with rectangular flanges; The rectangular flange at the top of the feed bin and the rectangular flange of the upstream equipment are connected via the flange connection assembly; the rectangular flange at the bottom of the feed bin and the rectangular flange at the top of the crushing bin are connected via the flange connection assembly.

8. The double-roll crusher according to claim 7, characterized in that: The side wall of the feed bin is provided with an observation window that can be flipped open and closed, and a first side of the observation window is connected to the feed bin via a hinge mechanism; A locking baffle is provided on the second side of the observation window, and a locking groove is formed through the locking baffle. The feed bin is provided with a hinged locking mechanism that cooperates with the locking baffle. After the hinged locking mechanism rotates into the locking groove, the locking baffle is pressed against the feed bin.

9. The double-roll crusher according to claim 8, characterized in that: The hinge mechanism comprises: a first hinge pin connected to a first side of the feed bin; A first hinge bolt, a first end of which is provided with a first hinge pin hole adapted to the first hinge pin shaft, and a second end of which is provided with an external thread; A pair of adjusting nuts cooperate with the external threads of the second end of the first hinge bolt to clamp and fix the first side of the observation window to the second end of the first hinge bolt.

10. The double-roll crusher according to claim 8, characterized in that: The hinged locking mechanism comprises: A second hinge pin connected to the second side of the feed bin; A second hinge bolt, a first end of which is provided with a second hinge pin hole adapted to the second hinge pin shaft, and a second end of which is provided with an external thread; The second locking nut cooperates with the external thread of the second end of the second hinge bolt and is used to press the locking baffle against the feed bin.

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