Screen drum structure of negative pressure screen analysis instrument

Abstract

The utility model provides a screen drum structure of a negative pressure screen analyzer, which is mounted at an annular opening of a negative pressure screen analyzer body and comprises a screen drum body arranged at the annular opening and a cover plate buckled on the screen drum body, the screen drum structure of the negative pressure screen analyzer further comprises a fixing component, a mounting groove is formed in the screen drum body, and the fixing component is arranged in the mounting groove. The fixing assembly comprises an adjusting rod arranged on the screen drum body in a penetrating mode, a linkage rod movably arranged at the end of the adjusting rod and a limiting pin movably arranged at the end of the linkage rod and arranged in the mounting groove in a penetrating mode, and the annular opening is provided with a limiting hole corresponding to the limiting pin. When the cover plate is buckled, the cover plate, the screen drum body and the annular opening are rapidly fixed and installed, an operator does not need to continuously press the cover plate and the screen drum body when the negative pressure screen analysis instrument body works, the two hands are liberated, and abundant time is vacated for other items.

Description

Technical Field

[0001] The utility model relates to the technical field of negative pressure sieve analyzers, in particular to a sieve drum structure of a negative pressure sieve analyzer. Background Art

[0002] The negative pressure sieve analyzer mainly uses airflow as the motive medium for screening. The entire system maintains a negative pressure state during operation. The fine powder material to be tested in the screen is in a fluid state under the action of the airflow ejected from the rotating air nozzle, and moves with the airflow. The fine particles with a particle size smaller than the screen mesh aperture in the screen cylinder are driven by the airflow through the screen and are sucked away, while the coarse particles with a particle size larger than the screen mesh aperture remain in the screen cylinder to achieve the purpose of screening. Since the negative pressure sieve analyzer itself has a certain degree of vibration during operation, when the screen cylinder is installed on the negative pressure sieve analyzer, it needs to be manually installed to ensure stability, which wastes manpower. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a sieve drum structure of a negative pressure sieve analyzer, which solves the problem in the prior art that the sieve drum needs to be manually installed on the negative pressure sieve analyzer to ensure stability.

[0004] The utility model provides a sieve drum structure of a negative pressure sieve analyzer, which is installed at the annular opening of the negative pressure sieve analyzer body, and comprises a sieve drum body arranged at the annular opening and a cover plate buckled on the sieve drum body. The sieve drum structure of the negative pressure sieve analyzer also comprises a fixing assembly, a mounting groove is provided in the sieve drum body, the fixing assembly comprises an adjusting rod penetrating the sieve drum body, a linkage rod movably provided at the end of the adjusting rod, and a limiting pin movably provided at the end of the linkage rod and penetrating the mounting groove, and a limiting hole corresponding to the limiting pin is provided at the annular opening;

[0005] Among them, the adjusting rod has a first state in which its end extends out of the end surface of the screen drum body and a second state in which its end is received in the end surface of the screen drum body. When the adjusting rod is in the first state, the limit pin is separated from the limit hole. When the adjusting rod is in the second state, the limit pin is engaged with the limit hole.

[0006] Preferably, a sliding groove is provided at the bottom end of the installation groove along the axial direction of the limiting pin, and a sliding block connected to the limiting pin is slidably engaged in the sliding groove.

[0007] Preferably, pull rings are provided on the inner sides of the slider and the slide groove, and a tension spring is provided between the two pull rings.

[0008] Preferably, a groove corresponding to the adjusting rod is formed on the end surface of the screen drum body, the end of the adjusting rod passes through the inside of the groove, and the cover plate is provided with an extrusion block corresponding to the groove, and the extrusion block is clamped in the groove.

[0009] Preferably, a fixing block is fixedly provided on the inner side of the groove, and a fixing groove is opened on the side of the extrusion block, and the fixing groove is clamped to the fixing block.

[0010] Preferably, the screen drum body is provided with a positioning block, the annular opening is provided with a positioning groove, and the positioning block is slidably arranged in the positioning groove.

[0011] Preferably, a sealing ring is provided on the screen drum body.

[0012] Preferably, a handle is provided on the cover plate.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] With the cooperation of the fixing assembly, the screen drum body is directly installed into the annular opening of the negative pressure sieve analyzer body, and the limit pin in the fixing assembly is aligned with the limit hole in the annular opening, and finally the cover plate is directly covered. Under the action of the cover plate, the adjusting rod is squeezed by the cover plate and moves downward, so that one end of the adjusting rod squeezes the linkage rod, and the shape of the linkage rod gradually moves in the horizontal direction, so that the end of the linkage rod sends the limit pin out of the installation groove and snaps into the limit hole. When the cover plate is buckled, the quick fixed installation of the cover plate, the screen drum body and the annular opening is completed. When the negative pressure sieve analyzer body is working, the operator does not need to continuously press the cover plate and the screen drum body, which frees up both hands, saves manpower, and frees up ample time for other matters. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure after the screen drum structure is installed in the embodiment of the utility model.

[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of the cover plate, the screen drum body and the annular opening in the embodiment of the utility model.

[0017] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of area A in the middle.

[0018] Figure 4 It is a schematic diagram of the structure of the cover plate in the embodiment of the utility model, mainly showing the extrusion block.

[0019] Figure 5 It is a schematic structural diagram of the screen drum body in the embodiment of the utility model, mainly showing the grooves.

[0020] Figure 6 It is a schematic diagram of the enlarged structure of the groove in the embodiment of the utility model.

[0021] In the above drawings: 1. Negative pressure sieve analyzer body; 2. Cover plate; 21. Extrusion block; 22. Fixed groove; 23. Handle; 3. Screen drum body; 31. Groove; 32. Fixed block; 33. Positioning block; 34. Mounting groove; 35. Slide groove; 36. Sealing ring; 4. Annular mouth; 41. Limit hole; 42. Positioning groove; 5. Adjustment rod; 6. Limit pin; 61. Sliding block; 7. Linkage rod; 8. Tension spring. DETAILED DESCRIPTION

[0022] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] like Figures 1 to 3 As shown, the embodiment of the utility model proposes a sieve drum structure of a negative pressure sieve analyzer, which is installed in the annular opening 4 of the negative pressure sieve analyzer body 1, including a sieve drum body 3 arranged at the annular opening 4 and a cover plate 2 buckled on the sieve drum body 3, and the sieve drum structure of the negative pressure sieve analyzer also includes a fixing component, a mounting groove 34 is opened in the sieve drum body 3, and the fixing component includes an adjusting rod 5 penetrated through the sieve drum body 3, a linkage rod 7 movably arranged at the end of the adjusting rod 5, and a stop pin 6 movably arranged at the end of the linkage rod 7 and penetrated through the mounting groove 34, and the annular opening 4 is provided with a stop hole 41 corresponding to the stop pin 6;

[0024] Among them, the adjusting rod 5 has a first state in which its end extends out of the end surface of the screen drum body 3 and a second state in which its end is received in the end surface of the screen drum body 3. When the adjusting rod 5 is in the first state, the limit pin 6 is separated from the limit hole 41. When the adjusting rod 5 is in the second state, the limit pin 6 is engaged with the limit hole 41.

[0025] In the embodiment of the utility model, the annular opening 4 is installed in the negative pressure sieve analyzer body 1 by means of bolt fixing. In the initial state, the limit pin 6 in the fixing assembly is received in the screen drum body 3, and the adjusting rod 5 extends out of the end face of the screen drum body 3, i.e., in the first state, when installing the screen drum body 3, the screen drum body 3 is directly placed in the annular opening 4, and the screen drum body 3 is supported by the annular opening 4, and the limit hole 41 on the annular opening 4 is aligned with the limit pin 6 of the screen drum body 3. After the installation is completed, the cover plate 2 is directly covered so that the cover plate 2 is first adjusted with the adjusting rod 5. , and the adjusting rod 5 is squeezed by the cover plate 2 and moves downward, so that one end of the adjusting rod 5 squeezes the linkage rod 7. Since the end of the linkage rod 7 connected to the adjusting rod 5 is limited by the adjusting rod 5 and can only move downward, the other end of the linkage rod 7 can only move horizontally under the action of the limit pin 6, so that the shape of the linkage rod 7 gradually moves in the horizontal direction, so that the end of the linkage rod 7 sends the limit pin 6 out of the installation groove 34 and snaps into the limit hole 41 to complete the fixation, that is, the second state. In the installation of the screen drum body 3, the first state is changed to the second state. In the whole operation, the traditional installation method is still used to install the cover plate 2 and the screen drum body 3. When the cover plate 2 is completely buckled on the screen drum body 3, the quick fixing installation between the cover plate 2, the screen drum body 3 and the annular opening 4 can be quickly completed. When the negative pressure sieve analyzer body 1 is working, the operator does not need to continuously press the cover plate 2 and the screen drum body 3, freeing both hands and freeing up ample time for other matters.

[0026] Specifically, Figure 3 As shown, a slide groove 35 is provided at the bottom end of the mounting groove 34 along the axial direction of the limit pin 6, and a slider 61 connected to the limit pin 6 is slidably engaged in the slide groove 35. With the cooperation of the slider 61 and the slide groove 35, a limit can be provided for the sliding of the limit pin 6, so that the limit pin 6 can only move along the direction of the slide groove 35. Moreover, a pull ring is provided on the inner side of the slider 61 and the slide groove 35, and a tension spring 8 is provided between the two pull rings. After the cover plate 2 is taken out, the limit pin 6 is pulled back by the tension of the tension spring 8, so that it is gradually received in the screen drum body 3, so that the limit pin 6 squeezes the adjusting rod 5 through the linkage rod 7, so that the end of the adjusting rod 5 extends out of the end face of the screen drum body 3, that is, it returns to the first state.

[0027] like Figures 3 to 5 As shown, a groove 31 corresponding to the adjusting rod 5 is formed on the end surface of the screen drum body 3 , and the end of the adjusting rod 5 passes through the inside of the groove 31 . The cover plate 2 is provided with an extrusion block 21 corresponding to the groove 31 , and the extrusion block 21 is clamped in the groove 31 .

[0028] In the embodiment of the utility model, when the cover plate 2 is installed, the extrusion block 21 on the cover plate 2 corresponds to the groove 31 on the screen drum body 3. When the screen drum body 3 is not fixed, the extrusion block 21 on the cover plate 2 squeezes one end of the adjustment rod 5 in the groove 31. After the cover plate 2 is released, the adjustment rod 5 pops up under the action of the tension spring 8, but the end of the adjustment rod 5 is always in the groove 31 and does not protrude from the groove 31, thereby ensuring the aesthetics of the screen drum body 3. In addition, Figure 4 and Figure 5 As shown, a fixing block 32 is fixedly provided on the inner side of the groove 31, and a fixing groove 22 is opened on the side of the extrusion block 21, and the fixing groove 22 is clamped on the fixing block 32. When the extrusion block 21 on the cover plate 2 is completely clamped into the corresponding groove 31, the cover plate 2 is rotated to make the extrusion block 21 move toward the position of the fixing block 32 until the fixing groove 22 on the extrusion block 21 is clamped onto the fixing block 32, thereby improving the fixing efficiency of the cover plate 2 and indirectly ensuring the installation stability of the screen drum body 3.

[0029] Specifically, Figure 3 As shown, the screen drum body 3 is provided with a positioning block 33, and the annular opening 4 is provided with a positioning groove 42. The positioning block 33 is slidably arranged in the positioning groove 42. In order to facilitate the positioning and installation of the screen drum body 3, when installing it, the positioning block 33 is snapped into the positioning groove 42. When the screen drum body 3 is completely installed, the limiting pin 6 on the screen drum body 3 is directly made to correspond to the limiting hole 41 on the annular opening 4, which simplifies the installation steps.

[0030] Specifically, Figure 5 As shown, a sealing ring 36 is provided on the sieve body 3 to improve the sealing performance of the cover plate 2 when it is buckled on the sieve body 3, and Figure 2 As shown, a handle 23 is provided on the cover plate 2 to facilitate operations such as rotating and lifting the cover plate 2.

[0031] The implementation principle of the embodiment of this application is:

[0032] When installing the sieve drum body 3, the positioning block 33 on the sieve drum body 3 corresponds to the positioning groove 42 of the annular opening 4, and the positioning block 33 is snapped into the positioning groove 42, and the cover plate 2 is directly buckled, so that the extrusion block 21 on the cover plate 2 corresponds to the groove 31 on the sieve drum body 3, and one end of the adjusting rod 5 is squeezed by the extrusion block 21, so that the adjusting rod 5 is squeezed and moves downward, so that one end of the adjusting rod 5 squeezes the linkage rod 7, so that the shape of the linkage rod 7 gradually moves in the horizontal direction, and the end of the linkage rod 7 sends the limit pin 6 out of the installation groove 34 and snaps into the limit hole 41 to complete the fixation, and finally the cover plate 2 is rotated to make the extrusion block 21 move to the position of the fixing block 32 until the fixing groove 22 on the extrusion block 21 is snapped onto the fixing block 32, and the tension spring 8 is in a stretched state at this time. When disassembling the sieve drum body 3, rotate the cover plate 2 in the opposite direction and take out the cover plate 2 to release the squeezing on the adjusting rod 5, so that the limit pin 6 returns to its original position due to the tension of the tension spring 8 and is gradually received into the sieve drum body 3, thereby releasing the limit on the sieve drum body 3 and taking out the sieve drum body 3.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A sieve drum structure of a negative pressure sieve analyzer, installed at an annular opening (4) of a negative pressure sieve analyzer body (1), comprising a sieve drum body (3) arranged at the annular opening (4) and a cover plate (2) buckled on the sieve drum body (3), characterized in that: The sieve drum structure of the negative pressure sieve analyzer further comprises a fixing assembly, wherein a mounting groove (34) is provided in the sieve drum body (3), and the fixing assembly comprises an adjusting rod (5) penetrating the sieve drum body (3), a linkage rod (7) movably provided at the end of the adjusting rod (5), and a limiting pin (6) movably provided at the end of the linkage rod (7) and penetrating the mounting groove (34), and the annular opening (4) is provided with a limiting hole (41) corresponding to the limiting pin (6); The adjusting rod (5) has a first state in which its end extends out of the end surface of the screen drum body (3) and a second state in which its end is received in the end surface of the screen drum body (3). When the adjusting rod (5) is in the first state, the limit pin (6) is separated from the limit hole (41); when the adjusting rod (5) is in the second state, the limit pin (6) is engaged with the limit hole (41).

2. The sieve drum structure of a negative pressure sieve analyzer according to claim 1, characterized in that: A sliding groove (35) is provided at the bottom end of the installation groove (34) along the axial direction of the limiting pin (6), and a sliding block (61) connected to the limiting pin (6) is slidably engaged in the sliding groove (35).

3. The sieve drum structure of a negative pressure sieve analyzer according to claim 2, characterized in that: Pull rings are provided on the inner sides of the sliding block (61) and the sliding groove (35), and a tension spring (8) is provided between the two pull rings.

4. The sieve drum structure of a negative pressure sieve analyzer according to claim 1, characterized in that: The end surface of the sieve drum body (3) is provided with a groove (31) corresponding to the adjusting rod (5), the end of the adjusting rod (5) passes through the inside of the groove (31), and the cover plate (2) is provided with an extrusion block (21) corresponding to the groove (31), and the extrusion block (21) is clamped in the groove (31).

5. The sieve drum structure of the negative pressure sieve analyzer according to claim 4, characterized in that: A fixing block (32) is fixedly arranged inside the groove (31), a fixing groove (22) is opened on the side of the extrusion block (21), and the fixing groove (22) is clamped to the fixing block (32).

6. The sieve drum structure of a negative pressure sieve analyzer according to claim 1, characterized in that: The screen drum body (3) is provided with a positioning block (33), the annular opening (4) is provided with a positioning groove (42), and the positioning block (33) is slidably arranged in the positioning groove (42).

7. The sieve drum structure of a negative pressure sieve analyzer according to claim 1, characterized in that: A sealing ring (36) is provided on the screen drum body (3).

8. The sieve drum structure of a negative pressure sieve analyzer according to claim 1, characterized in that: The cover plate (2) is provided with a handle (23).

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