Device for adjusting and detecting axial clearance of screw rod of extruder

Abstract

The utility model discloses an extruder screw axial clearance adjusting and detecting device, the extruder comprises a transmission case and a machine barrel connected with the transmission case, two screws are arranged in the machine barrel, the transmission case is connected with two output shafts, the two output shafts are respectively in one-to-one correspondence with the two screws, and the two output shafts are connected with the transmission case. The adjusting and detecting device comprises a bottom plate, the bottom plate is connected with the transmission box or the machine barrel, two symmetrically-arranged sliding blocks are arranged in the bottom plate, the two sliding blocks correspond to the two screws or the two output shafts in a one-to-one mode respectively, the two sliding blocks are each provided with an axial adjusting assembly, and the axial adjusting assemblies are connected with the two screws or the two output shafts in a one-to-one mode. The axial adjusting assembly comprises a push rod, the push rod is connected with the sliding block, the push rod is suitable for moving in the sliding block in the axis direction of the screw rods or the output shafts, and the elastic gap is detected by pushing the two screw rods and the corresponding output shafts. And on the basis, the screw clearance is adjusted.

Description

TECHNICAL FIELD

[0001] The utility model relates to screw engagement gap detection adjusting technical field, specifically, relates to extruder screw axial gap adjustment detection device. BACKGROUND

[0002] At present, in the technical field of extruder, especially double screw extruder, the axial gap control between screws is one of the key factors to ensure the efficient and stable operation of the equipment, and with the continuous expansion of the application scene of the extruder and the increasing improvement of the process requirements, the accurate control of the screw gap is particularly important.

[0003] Through the search, it is found that the Chinese utility model patent with the authorization announcement number CN212045879U discloses a wood-plastic extruder screw horizontal adjusting device, the patent realizes the lifting and left-right horizontal adjustment of the screw through the adjusting sliding groove and the sliding adjusting plate on the base, the first and second telescopic screws and the lantern-shaped locking spring sheet on the clamping screw, and ensures that the screw is stable and not fallen and the position is adjustable; however, the height and left-right direction adjustment of the screw in the patent cannot accurately control the axial gap between the two screws, and the axial movement gap between the screws of the double screw extruder is still difficult to accurately measure and control when working, since there is a difference between the screw gap of the equipment in the no-load debugging and the actual working state, the traditional debugging method cannot truly reflect the actual gap condition of the screw in the working process, and the uncertainty of the gap can easily lead to the meshing phenomenon between the threaded elements in the production process, when the threaded elements are meshed, the threaded surface is lightly abraded, the service life of the element is shortened, and the threaded element, even the mandrel and the screw, is heavily damaged, and the equipment is stopped for production. UTILITY MODEL CONTENTS

[0004] The technical problem to be solved by the utility model is to overcome the defects in the prior art, the elastic gap is detected by respectively pushing two screws and the corresponding output shafts, and the screw gap is adjusted based on this.

[0005] In order to solve the above technical problems, the technical scheme of the utility model is an extruder screw axial gap adjustment detection device, the extruder comprises: a transmission box and a barrel connected with the transmission box;

[0006] Two screws are arranged in the barrel, two output shafts are connected to the transmission box, and the two output shafts correspond to the two screws one by one respectively;

[0007] The adjustment detection device comprises a bottom plate, the bottom plate is connected with the transmission box or the barrel;

[0008] Two sliding blocks are symmetrically arranged in the bottom plate, and each of the two sliding blocks corresponds to one of the two screw rods or the two output shafts;

[0009] An axial adjusting assembly is arranged on each of the two sliding blocks, and the axial adjusting assembly comprises a push rod connected to the sliding block, and the push rod is adapted to move along the axial direction of the screw rod or the output shaft in the sliding block;

[0010] The push rod is adapted to be actuated to push the corresponding output shaft or screw rod to move, and then cooperate with the dial gauge to detect the elastic gap generated by the rebound of the output shaft or the screw rod after being extruded.

[0011] Further, a threaded hole is formed in the sliding block, and an external thread is arranged on the outer circumferential surface of the push rod, and the push rod is threadedly connected with the sliding block;

[0012] The push rod is adapted to be rotated to move linearly in the sliding block.

[0013] Further, an extension rod is connected to one end of the push rod towards the screw rod or the output shaft.

[0014] Further, the two sliding blocks are movably arranged on the bottom plate;

[0015] Horizontal adjusting assemblies are arranged on both sides of the bottom plate, and each of the two horizontal adjusting assemblies corresponds to one of the two sliding blocks, and the horizontal adjusting assembly comprises a moving rod connected to the corresponding sliding block;

[0016] The moving rod is adapted to be actuated to drive the corresponding sliding block to move.

[0017] Further, a through groove is formed in the bottom plate, and the two sliding blocks are movably arranged in the through groove;

[0018] A threaded hole is formed in the interior of the bottom plate, and the threaded hole is communicated with the through groove;

[0019] An external thread is arranged on the outer circumferential surface of the moving rod, and the moving rod is threadedly connected in the threaded hole, and one end of the moving rod is connected to the sliding block.

[0020] Further, a plurality of mounting holes are formed in the bottom plate.

[0021] Further, a scale disc is arranged on the bottom plate, and an indicating arrow is arranged on each of the two sliding blocks;

[0022] The indicating arrow corresponds to the scale on the scale disc.

[0023] Furthermore, a handle is provided on the base plate.

[0024] By adopting the above technical solution, this utility model has the following beneficial effects:

[0025] 1. Through the design of push rods and extension rods, the push rod is positioned against the screw or output shaft to be operated during use. The push rod moves and presses against the screw or output shaft to eliminate the inherent and elastic gaps between the output shaft and the transmission box. After both gaps are eliminated, the push rod moves in the opposite direction to release the pressure on the screw or output shaft. The screw or output shaft rebounds under the action of the spring in the transmission box. At this time, the fixed gap is eliminated, the elastic gap is retained, and the specific value is measured by a dial indicator, which facilitates subsequent gap adjustment based on this value. The extension rod can extend the travel of the push rod as needed.

[0026] 2. Through the design of the horizontal adjustment component and mounting holes, the mounting holes on the base plate allow the base plate to be connected to extruders of various sizes. After connection, the two push rods can be moved to the two corresponding screws or output shafts by the horizontal adjustment component, which facilitates the subsequent operation of the screws or output shafts by the push rods. The overall structure is simple, can be directly connected to the extruder, and is easy to operate. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the output shaft detection and adjustment assembly of this utility model;

[0028] Figure 2 For the present utility model Figure 1 Enlarged view of point A in the middle;

[0029] Figure 3 This is a schematic diagram of the screw detection and adjustment assembly of this utility model;

[0030] Figure 4 For the present utility model Figure 3 Enlarged view at point B in the middle;

[0031] Figure 5 This is a front view of the adjustment and detection device of this utility model;

[0032] Figure 6 This is a side view of the adjustment and detection device of this utility model;

[0033] Figure 7 This is a three-dimensional schematic diagram of the adjustment and detection device of this utility model.

[0034] In the diagram: 1. Base plate; 11. Mounting holes;

[0035] 2. Sliding block;

[0036] 3. Horizontal adjustment assembly; 31. Moving rod;

[0037] 4, axial adjustment assembly; 41, push rod; 42, extension rod;

[0038] 5, dial; 6, handle;

[0039] 71, transmission box; 72, output shaft; 73, barrel; 74, screw;

[0040] 8, dial end face; 81, screw gap one; 82, screw gap two. DETAILED DESCRIPTION

[0041] In order to make the content of the utility model more easily be clearly understood, below according to specific embodiment and combining with the drawings, the utility model is further detailed.

[0042] Example one

[0043] As Figures 1-7 The axial gap adjustment detection device of extruder screw 74, extruder includes: transmission box 71 and the barrel 73 connected with transmission box 71;

[0044] The barrel 73 is provided with two screw 74, transmission box 71 is connected with two output shaft 72, and two output shaft 72 correspond to two screw 74 respectively;

[0045] Adjustment detection device includes: bottom plate 1, and bottom plate 1 is connected with transmission box 71 or barrel 73;

[0046] Bottom plate 1 is provided with two symmetrically arranged sliding blocks 2, and two sliding blocks 2 correspond to two screw 74 or two output shaft 72 respectively;

[0047] Two sliding blocks 2 are provided with axial adjustment assembly 4, and axial adjustment assembly 4 includes push rod 41, push rod 41 is connected with sliding block 2, and push rod 41 is suitable for moving in the axial direction of screw 74 or output shaft 72 in sliding block 2;

[0048] Push rod 41 is suitable for being acted to push corresponding output shaft 72 or screw 74 to move, and then cooperate dial to detect the elastic gap generated by the rebound of output shaft 72 or screw 74 after being extruded.

[0049] As Figures 5-7 Sliding block 2 is provided with threaded hole, and the outer periphery of push rod 41 is provided with external thread, and push rod 41 is connected with sliding block 2 by screw thread;

[0050] Push rod 41 is suitable for being rotated to move linearly in sliding block 2.

[0051] As Figure 6 The end of push rod 41 towards screw 74 or output shaft 72 is connected with extension rod 42.

[0052] As shown in Figure 5 , Figure 7 , two sliding blocks 2 are movably arranged on the bottom plate 1;

[0053] The two sides of the bottom plate 1 are respectively provided with horizontal adjustment assemblies 3, and the two horizontal adjustment assemblies 3 correspond to the two sliding blocks 2 one by one, and the horizontal adjustment assembly 3 comprises a moving rod 31 connected with the corresponding sliding block 2;

[0054] The moving rod 31 is adapted to be actuated to drive the corresponding sliding block 2 to move.

[0055] As shown in Figure 5 , Figure 7 , a through slot is formed in the bottom plate 1, and the two sliding blocks 2 are movably arranged in the through slot;

[0056] The inside of the bottom plate 1 is provided with a threaded hole, and the threaded hole is communicated with the through slot;

[0057] An external thread is arranged on the outer circumferential surface of the moving rod 31, and the moving rod 31 is threadedly connected in the threaded hole, and one end of the moving rod 31 is connected with the sliding block 2.

[0058] The working principle of the embodiment is as follows:

[0059] Firstly, the structure of the extruder is a transmission box 71 and a machine barrel 73 connected with the transmission box 71, two screw rods 74 are arranged in the machine barrel 73, two output shafts 72 corresponding to the screw rods 74 are arranged on the transmission box 71, and the connection between the output shaft 72 and the transmission box 71 has a fixed gap due to assembly problems and an elastic gap caused by the arrangement of an elastic element in the transmission box 71, the elastic element between the transmission box 71 and the output shaft 72, according to its function and design, usually refers to an element that plays a role in shock absorption, buffering, displacement compensation and the like in the transmission process, in this embodiment, the elastic element is a spring, and the protruding part and the recessed part between the two screw rods 74 cooperate to form a screw rod 74 gap, and the two sides of the protruding part in the screw rod 74 gap are respectively a screw rod 74 gap one and a threaded gap two;

[0060] The whole adjustment detection is divided into three steps, step one is to directly butt joint the bottom plate 1 of the adjustment detection device with the shell of the transmission box 71, after the butt joint is completed, two moving rods 31 are respectively rotated to drive the corresponding sliding blocks 2 to move to the positions of the two output shafts 72 of the transmission box 71, and then drive the two push rods 41 to move to the positions corresponding to the two output shafts 72, at the same time, a dial gauge is installed, the measuring point of the dial gauge is selected as the dialing section of the output shaft 72 of the transmission box 71 and is adjusted to zero, it should be noted that the diameter of the push rod 41 is smaller than the diameter of the output shaft 72, and the dialing end face is the end face part not covered by the push rod 41 after the push rod 41 contacts the end face of the output shaft 72;

[0061] After the above preparation, rotate the push rod 41 to move the push rod 41 in the sliding block 2 to the direction of the output shaft 72, the push rod 41 generates a pushing force on the corresponding output shaft 72, forcing the output shaft 72 to move to the direction of the transmission box 71, and in the process of moving, the push rod 41 causes extrusion to the transmission box 71, and in the process of extrusion, the inherent gap caused by assembly problems is first eliminated, and after the inherent gap is eliminated, the push rod 41 continues to apply a pushing force to the corresponding output shaft 72, causing the output shaft 72 to continue to move, and in the process of continuing to move, the elastic element in the transmission box 71 is extruded, and in the process of the entire output shaft 72 being pushed, the dial indicator pointer initially set to zero always remains in the dialing state, and when the elastic element is extruded to the state that the output shaft 72 cannot continue to move, the entire elastic gap is eliminated, and at this time the dial indicator pointer also stops moving, and then reverse rotate the push rod 41 to remove the pushing force on the output shaft 72, and the output shaft 72 loses the pushing force and cannot continue to apply pressure to the elastic element, so the elastic element rebounds to drive the output shaft 72 to move in the reverse direction. In this process, the elastic element only resets the output shaft 72 to the position before the elastic element is extruded, and the inherent gap that has been eliminated cannot be restored. In the process of the output shaft 72 moving in the reverse direction, the dial indicator pointer moves, and the initial zero position of the dial indicator, the value obtained when the inherent gap and the elastic gap are both eliminated, and the value obtained when the elastic gap is restored can accurately determine the specific value of the elastic gap between the output shaft 72 and the transmission box 71;

[0062] Step two: disconnect the transmission box 71 from the bottom plate 1, connect the machine cylinder 73 with the transmission box 71, and place the screw rod 74 in the machine cylinder 73 so that the screw rod 74 is in contact with its corresponding output shaft 72. Then, connect the bottom plate 1 with the installed machine cylinder 73, and rotate the moving rod 31 to move the sliding block 2 and the push rod 41 to the corresponding screw rod 74. Select the measurement point of the dial indicator as the dialing cross section of the output shaft 72 of the transmission box 71 and set it to zero. It should be noted that the diameter of the dial indicator is smaller than the diameter of the output shaft 72, and the dialing end surface is the end surface portion of the screw rod 74 that is not covered by the screw rod 74 after the screw rod 74 contacts the end surface of the output shaft 72.

[0063] For ease of expression, the subsequent corresponding push rod 41, screw rod 74, and output shaft 72 are all distinguished by left and right.

[0064] After the above preparation, rotate the left push rod 41 to extrude the left screw rod 74, and the extruded left screw rod 74 extrudes the left output shaft 72. At this time, the dial indicator pointer on the left output shaft 72 continuously moves until the pointer stops, which means that the inherent gap and the elastic gap of the left output shaft 72 have been eliminated, and at this time the left screw rod 74 is in a limited state and cannot move.

[0065] On the basis that the left screw rod 74 cannot be moved, rotating the right push rod 41 drives the right screw rod 74 to move and causes extrusion to the right output shaft 72, in the process, directly observing whether the right screw rod 74 causes interference to the left screw rod 74 in the moving process, the right screw rod 74 is pressed in, and then the push rod 41 is loosened to make the right screw rod 74 rebound by the elastic element of the right output shaft 72, the operation is repeated, ensuring that the pressing and rebounding of the right screw rod 74 will not cause interference to the left screw rod 74, and the amount of pressing and rebounding will be monitored by the pointer of the dial gauge, the specific values of the screw rod 74 gap one and the screw rod 74 gap two can be obtained by the operator according to the record of the pointer value, in this way, the pressing and rebounding operation of the right screw rod 74 is repeatedly carried out until the screw rod 74 gap one and the screw rod 74 gap two reach the required values, it should be noted that the specific indexes of the screw rod 74 gap one and the screw rod 74 gap two are determined according to the actual process requirements, the complete elastic gap value obtained in step one is a larger range, and the repeated pressing and rebounding process of the right screw rod 74 in step two is to reasonably distribute and adjust the complete elastic gap value, to control the actual axial jump of the right screw rod 74 in work, so that the screw rod 74 gap one and the screw rod 74 gap two meet the actual needs, and the right screw rod 74 after adjustment is fixed, the fixing method of the screw rod 74 is the prior art, which will not be described in detail here.

[0066] The operation method of step three is the same as that of step two, and the above steps are repeated to adjust the limited left screw rod 74 in step two to ensure that the screw rod 74 gap one and the screw rod 74 gap two formed by the pressing and rebounding of the two screw rods 74 can meet the required gap value and will not cause interference.

[0067] It should be noted that according to the actual use, an extension rod 42 can be arranged at one end of the push rod 41, and the extension rod 42 is used to lengthen the push rod 41.

[0068] Example two

[0069] As shown in Figure 5 , the present embodiment further comprises the following structure on the basis of example one: a plurality of mounting holes 11 are formed through the bottom plate 1.

[0070] As shown in Figure 5 , the bottom plate 1 is provided with a scale disc 5, and the two sliding blocks 2 are provided with indicating arrows;

[0071] The indicating arrows correspond to the scales on the scale disc 5.

[0072] As shown in Figures 5-7 , the bottom plate 1 is provided with a handle 6.

[0073] The working principle of the embodiment is as follows:

[0074] A plurality of mounting holes 11 are formed on the bottom plate 1, and the plurality of mounting holes 11 can be compatible with different machine types, facilitating the butt joint work of the bottom plate 1 and the transmission box 71 or the machine barrel 73;

[0075] A scale disc 5 corresponding to the indication arrow on the sliding block 2 is arranged on the bottom plate 1, and when the corresponding sliding block 2 and the corresponding screw rod 74 or the output shaft 72 are aligned by the moving rod 31, the corresponding sliding block 2 can be accurately positioned according to the numerical value on the scale disc 5;

[0076] In addition, a handle 6 is arranged on the bottom plate 1, and the handle 6 facilitates the operation of the entire adjustment detection device by the operator.

[0077] The above-described specific embodiments further specifically describe the technical problems, technical solutions and beneficial effects solved by the utility model, and it should be understood that the above-described specific embodiments are only specific embodiments of the utility model and are not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An extruder screw (74) axial gap adjustment detection device characterized by: The extruder comprises a transmission case (71) and a barrel (73) connected with the transmission case (71); Two screws (74) are arranged in the barrel (73), and two output shafts (72) are connected with the transmission case (71), and the two output shafts (72) correspond to the two screws (74) respectively; The adjustment detection device comprises a bottom plate (1) connected with the transmission case (71) or the barrel (73); Two symmetrically arranged sliding blocks (2) are arranged in the bottom plate (1), and the two sliding blocks (2) correspond to the two screws (74) or the two output shafts (72) respectively; An axial adjustment assembly (4) is arranged on each of the two sliding blocks (2), the axial adjustment assembly (4) comprises a push rod (41) connected with the sliding block (2), and the push rod (41) is suitable for moving along the axis direction of the screw (74) or the output shaft (72) in the sliding block (2); The push rod (41) is suitable for being acted on to push the corresponding output shaft (72) or screw (74) to move, and then cooperate with a dial gauge to detect the elastic gap generated by the rebound of the output shaft (72) or the screw (74) after being extruded.

2. The extruder screw (74) axial gap adjustment detection apparatus according to claim 1, wherein, A threaded hole is formed in the sliding block (2), an external thread is arranged on the outer circumferential surface of the push rod (41), and the push rod (41) is threadedly connected with the sliding block (2); The push rod (41) is suitable for being rotated to move linearly in the sliding block (2).

3. The extruder screw (74) axial gap adjustment detection apparatus according to claim 1 or 2, characterized in that, An extension rod (42) is connected to one end of the push rod (41) which faces the screw (74) or the output shaft (72).

4. The extruder screw (74) axial gap adjustment detection apparatus according to claim 1, wherein, Each of the two sliding blocks (2) is movably arranged on the bottom plate (1); Horizontal adjustment assemblies (3) are arranged on the two sides of the bottom plate (1) respectively, the two horizontal adjustment assemblies (3) correspond to the two sliding blocks (2) respectively, and the horizontal adjustment assembly (3) comprises a moving rod (31) connected with the corresponding sliding block (2); The moving rod (31) is suitable for being acted on to drive the corresponding sliding block (2) to move.

5. The extruder screw (74) axial gap adjustment detection apparatus according to claim 4, wherein, A through groove is formed in the bottom plate (1), and the two sliding blocks (2) are movably arranged in the through groove; A threaded hole is formed in the inside of the bottom plate (1), and the threaded hole is communicated with the through groove; An external thread is arranged on the outer circumferential surface of the moving rod (31), and the moving rod (31) is threadedly connected in the threaded hole, and one end of the moving rod (31) is connected with the sliding block (2).

6. The extruder screw (74) axial gap adjustment detection apparatus according to claim 1, wherein, A plurality of mounting holes (11) are formed in the bottom plate (1).

7. The extruder screw (74) axial gap adjustment detection apparatus according to claim 1, wherein, A scale disc (5) is arranged on the bottom plate (1), and indicating arrows are arranged on the two sliding blocks (2); The indicating arrows correspond to the scales on the scale disc (5).

8. The extruder screw (74) axial gap adjustment detection apparatus according to claim 1, wherein, A handle (6) is arranged on the bottom plate (1).

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