A multi-stage variable diameter combined screw

Abstract

This utility model relates to a multi-segment variable diameter combined screw, including a feeding section, a compression section attached to the left end of the feeding section, and a metering section attached to the left end of the compression section. A first auxiliary mechanism is provided on the surface of the feeding section, and a second auxiliary mechanism is provided on the surface of the metering section. This utility model uses an upward-pulling rod to move an auxiliary plate and a locking rod upwards, causing the end of the locking rod to disengage from the inner side of the first locking block. At this time, the first locking block is unrestricted and can be pulled away from the feeding screw. Similarly, the second auxiliary mechanism effectively allows the second locking block to be pulled away from the metering screw. At this point, each segment of the variable diameter screw can be disassembled for easy local inspection and replacement. During assembly, the first locking block is locked into the first locking groove based on the upward-pulling rod. Then, the rod is released, and the end of the locking rod pops out and effectively engages with the inner side of the first locking block due to the spring's rebound force, thus limiting the first locking block. Similarly, the second locking block can be confined inside the metering screw. The entire variable diameter screw is quick and easy to assemble and disassemble.

Description

Technical Field

[0001] This utility model relates to the field of multi-segment variable diameter screw technology, and in particular to a multi-segment variable diameter combined screw. Background Technology

[0002] A multi-section variable diameter screw is a mechanical part with multiple different diameter sections along the screw axis. It is widely used in plastics processing, food processing, oil drilling and other fields. By combining different diameter sections and changing the thread parameters, it can achieve multiple functions such as material conveying, compression and mixing.

[0003] Patent CN215040112U discloses a variable-diameter screw for a waste plastic film extruder, comprising a variable-diameter screw body. The variable-diameter screw body includes a first rod, which is straight. Multiple turns of first helical blades are fixedly connected to the first rod, and the outer diameter of the multiple turns of first helical blades is the same. The outer diameter of the first rod body is variable, with one end larger than the other. This invention uses a variable-diameter screw in conjunction with the barrel, thereby gradually compressing the plastic film during extrusion, thus ensuring the compaction of the output material.

[0004] However, the aforementioned variable diameter screw for waste plastic film extruders still has the following shortcomings:

[0005] The aforementioned variable diameter screw adopts a one-piece molding structure. Therefore, when a section of the screw is damaged, the entire variable diameter screw needs to be replaced, which increases the replacement cost. In view of this, we propose a multi-section variable diameter combined screw. Utility Model Content

[0006] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a multi-segment variable diameter combined screw to solve the technical problem that the current variable diameter screw adopts an integral molding structure, so when a certain segment of the screw is damaged, the entire variable diameter screw needs to be replaced, which increases the replacement cost.

[0007] To achieve the purpose of this utility model, the technical solution adopted by this utility model is as follows: a multi-section variable diameter combined screw is designed, including a feeding section, a compression section attached to the left end of the feeding section, a metering section attached to the left end of the compression section, a first auxiliary mechanism provided on the surface of the feeding section, and a second auxiliary mechanism provided on the surface of the metering section, wherein the first auxiliary mechanism and the second auxiliary mechanism have the same structure.

[0008] The first auxiliary mechanism includes an auxiliary plate, which is matched and engaged with the inner side of the surface of the feeding section. A pull rod is fixedly fastened to the middle of the surface of the auxiliary plate, and a clamping rod is fixedly connected to the lower end of the auxiliary plate. A limiting ring plate is fixedly sleeved on the surface of the clamping rod, and a spring is provided on one side of the limiting ring plate.

[0009] Preferably, the auxiliary plate is arc-shaped, and the outer end face of the auxiliary plate is flush with the outer surface of the feed section rod.

[0010] Preferably, the auxiliary plate forms an elastic structure with the feeding section through a locking rod, a limiting ring plate, and a spring, and the limiting ring plate and the spring are locked inside the feeding section.

[0011] Preferably, the feeding section includes a feeding screw, and a first slot is provided on the inner side of the left end of the feeding screw, and a set of first guide slots are symmetrically provided on both sides of the first slot.

[0012] Preferably, the compression section includes a compression screw, a first locking block is fixedly connected to the middle of the right end of the compression screw, a set of first guide rods are symmetrically fixed on both sides of the first locking block, and a second locking block is fixedly connected to the middle of the left end of the compression screw, a set of second guide rods are symmetrically fixed on both sides of the second locking block.

[0013] Preferably, the compression screw body is in the shape of an inverted frustum cone, and the diameter of the right end of the compression screw body is the same as the diameter of the feed screw body.

[0014] Preferably, the first card block and the first guide rod can be matched and engaged inside the first card slot and the first guide groove, respectively.

[0015] Preferably, the metering section includes a metering screw, and a second slot is provided on the inner side of the right end of the metering screw, and a set of second guide slots are symmetrically provided on both sides of the second slot.

[0016] Preferably, the diameter of the left end of the compression screw is the same as the diameter of the metering screw, and the second locking block and the second guide rod at the left end of the compression screw can be matched and engaged in the second locking groove and the second guide groove, respectively.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. This utility model effectively moves the auxiliary plate and the locking rod upward by pulling the upper pull rod, thereby causing the end of the locking rod to disengage from the inner side of the first locking block. At this time, the first locking block is unrestricted and can be pulled away from the feeding screw. Similarly, the second locking block is effectively pulled away from the metering screw by the second auxiliary mechanism. At this time, each section of the variable diameter screw can be disassembled for easy local inspection and replacement. During assembly, the first locking block is locked into the first locking groove based on the upper pull rod. Then, the pull rod is released. Due to the spring rebound force, the end of the locking rod pops out and effectively locks into the inner side of the first locking block, thereby limiting the first locking block. Similarly, the second locking block can be limited to the inside of the metering screw. The entire variable diameter screw is quick and easy to disassemble and assemble.

[0019] 2. In this utility model, the cooperation between the first locking block and the first locking groove facilitates rapid positioning between the compression screw and the feeding screw, and the cooperation between the first guide rod and the first guide groove is used to share the torque of the first locking block.

[0020] 3. In this utility model, the cooperation between the second locking block and the second locking groove facilitates quick positioning between the compression screw and the metering screw, and the cooperation between the second guide rod and the second guide groove is used to share the torque of the second locking block. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the disassembled structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the disassembled structure from another perspective of the present invention;

[0024] Figure 4 This is a partial cross-sectional structural diagram of the feeding section of this utility model;

[0025] Figure 5 This is a partial cross-sectional structural diagram of the feeding section from another perspective of this utility model;

[0026] In the diagram: 1. Feeding section; 2. Compression section; 3. Metering section; 4. First auxiliary mechanism; 5. Second auxiliary mechanism;

[0027] 101. Feed screw; 102. First slot; 103. First guide groove;

[0028] 201. Compression screw; 202. First locking block; 203. First guide rod; 204. Second locking block; 205. Second guide rod;

[0029] 301. Metering screw; 302. Second slot; 303. Second guide groove;

[0030] 401. Auxiliary plate; 402. Pull rod; 403. Locking rod; 404. Limiting ring plate; 405. Spring. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0032] A multi-section variable diameter combined screw, see Figures 1 to 5 It includes a feeding section 1, a compression section 2 attached to the left end of the feeding section 1, a metering section 3 attached to the left end of the compression section 2, a first auxiliary mechanism 4 provided on the surface of the feeding section 1, and a second auxiliary mechanism 5 provided on the surface of the metering section 3. The first auxiliary mechanism 4 and the second auxiliary mechanism 5 have the same structure.

[0033] The first auxiliary mechanism 4 includes an auxiliary plate 401, which is matched and engaged with the inner side of the surface of the feeding section 1. The auxiliary plate 401 is arc-shaped, and its outer end face is flush with the outer surface of the rod of the feeding section 1. A pull rod 402 is fixedly engaged in the middle of the surface of the auxiliary plate 401. A locking rod 403 is fixedly connected to the lower end of the auxiliary plate 401. A limiting ring plate 404 is fixedly sleeved on the surface of the locking rod 403. A spring 405 is provided on one side of the limiting ring plate 404. Furthermore, the auxiliary plate 401 forms an elastic structure with the feeding section 1 through the locking rod 403, the limiting ring plate 404, and the spring 405. The limiting ring plate 404 and the spring 405 are engaged in the inner side of the feeding section 1. This utility model effectively moves the auxiliary plate 401 and the locking rod 403 upward by pulling up the pull rod 402, thereby causing the end of the locking rod 403 to disengage from the inside of the first locking block 202. At this time, the first locking block 202 is unrestricted and can be pulled away from the feeding screw 101. Similarly, the second auxiliary mechanism 5 effectively pulls the second locking block 204 away from the metering screw 301. At this time, each section of the variable diameter screw can be disassembled for easy local maintenance and replacement. During assembly, the first locking block 202 is locked into the first locking groove 102 based on the pull rod 402. Then, the pull rod 402 is released. Under the influence of the spring 405, the end of the locking rod 403 pops out and effectively engages with the inside of the first locking block 202, thereby limiting the first locking block 202. Similarly, the second locking block 204 can be limited to the inside of the metering screw 301. The entire variable diameter screw is quick and easy to disassemble and assemble.

[0034] It is worth noting that the feeding section 1 includes a feeding screw 101, with a first slot 102 opened on the inner side of the left end of the feeding screw 101, and a set of first guide grooves 103 symmetrically opened on both sides of the first slot 102. The compression section 2 includes a compression screw 201, wherein the compression screw 201 is in the shape of an inverted frustum cone, and the diameter of the right end of the compression screw 201 is the same as the diameter of the feeding screw 101. A first locking block 202 is fixedly connected to the middle of the right end of the compression screw 201, and a set of first guide rods 203 are symmetrically fixed on both sides of the first locking block 202. Furthermore, the first locking block 202 and the first guide rods 203 can be matched and engaged in the first slot 102 and the first guide groove 103, respectively. A second locking block 204 is fixedly connected to the middle of the left end of the compression screw 201, and a set of second guide rods 205 are symmetrically fixed on both sides of the second locking block 204. In this utility model, the cooperation between the first locking block 202 and the first locking groove 102 facilitates the rapid positioning between the compression screw 201 and the feeding screw 101, and the cooperation between the first guide rod 203 and the first guide groove 103 is used to share the torque of the first locking block 202.

[0035] It is worth noting that the metering section 3 includes a metering screw 301. A second slot 302 is provided on the inner side of the right end of the metering screw 301. A set of second guide grooves 303 are symmetrically provided on both sides of the second slot 302. The diameter of the left end of the compression screw 201 is the same as the diameter of the metering screw 301. The second locking block 204 and the second guide rod 205 at the left end of the compression screw 201 can be matched and engaged in the second slot 302 and the second guide groove 303, respectively. In this utility model, the cooperation between the second locking block 204 and the second slot 302 facilitates the rapid positioning between the compression screw 201 and the metering screw 301. The cooperation between the second guide rod 205 and the second guide groove 303 is used to share the torque of the second locking block 204.

[0036] Working principle: The engagement between the first locking block 202 and the first locking groove 102 facilitates rapid positioning between the compression screw 201 and the feed screw 101. The engagement between the first guide rod 203 and the first guide groove 103 is used to share the torque of the first locking block 202. The engagement between the second locking block 204 and the second locking groove 302 facilitates rapid positioning between the compression screw 201 and the metering screw 301. The engagement between the second guide rod 205 and the second guide groove 303 is used to share the torque of the second locking block 204. By pulling up the pull rod 402, the auxiliary plate 401 and the locking rod 403 are moved upward, thereby causing the end of the locking rod 403 to disengage from the first locking block 202. Inside, the first locking block 202 can be pulled away from the feed screw 101 without restriction. Similarly, the second locking block 204 is pulled away from the metering screw 301 through the second auxiliary mechanism 5. At this time, each section of the variable diameter screw can be disassembled for easy local maintenance and replacement. During assembly, the first locking block 202 is locked into the first slot 102 on the basis of pulling up the pull rod 402. Then, the pull rod 402 is released. Due to the rebound force of the spring 405, the end of the locking rod 403 pops out and locks into the inside of the first locking block 202, thereby limiting the first locking block 202. Similarly, the second locking block 204 can be limited to the inside of the metering screw 301. The entire variable diameter screw is quick and easy to disassemble and assemble.

[0037] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A multi-segment variable diameter combined screw, characterized in that, It includes a feeding section (1), a compression section (2) attached to the left end of the feeding section (1), a metering section (3) attached to the left end of the compression section (2), a first auxiliary mechanism (4) provided on the surface of the feeding section (1), and a second auxiliary mechanism (5) provided on the surface of the metering section (3). The first auxiliary mechanism (4) and the second auxiliary mechanism (5) have the same structure. The first auxiliary mechanism (4) includes an auxiliary plate (401), which is matched and engaged with the inner side of the surface of the feeding section (1). A pull rod (402) is fixedly fastened in the middle of the surface of the auxiliary plate (401), and a clamping rod (403) is fixedly connected to the lower end of the auxiliary plate (401). A limiting ring plate (404) is fixedly sleeved on the surface of the clamping rod (403), and a spring (405) is provided on one side of the limiting ring plate (404).

2. The multi-segment variable diameter combined screw as described in claim 1, characterized in that, The auxiliary plate (401) is arc-shaped, and the outer end face of the auxiliary plate (401) is flush with the outer surface of the feed section (1) rod.

3. The multi-segment variable diameter combined screw as described in claim 1, characterized in that, The auxiliary plate (401) forms an elastic structure with the feeding section (1) through the clamping rod (403), the limiting ring plate (404), and the spring (405). The limiting ring plate (404) and the spring (405) are clamped inside the feeding section (1).

4. The multi-segment variable diameter combined screw as described in claim 1, characterized in that, The feeding section (1) includes a feeding screw (101), and a first slot (102) is provided on the inner side of the left end of the feeding screw (101). A set of first guide slots (103) are symmetrically provided on both sides of the first slot (102).

5. A multi-segment variable diameter combined screw as described in claim 4, characterized in that, The compression section (2) includes a compression screw (201), a first locking block (202) is fixedly connected to the middle of the right end of the compression screw (201), a set of first guide rods (203) are symmetrically fixed on both sides of the first locking block (202), a second locking block (204) is fixedly connected to the middle of the left end of the compression screw (201), and a set of second guide rods (205) are symmetrically fixed on both sides of the second locking block (204).

6. A multi-segment variable diameter combined screw as described in claim 5, characterized in that, The compression screw (201) is shaped like an inverted frustum cone, and the diameter of the right end of the compression screw (201) is the same as the diameter of the feed screw (101).

7. A multi-segment variable diameter combined screw as described in claim 5, characterized in that, The first card block (202) and the first guide rod (203) can be matched and engaged in the first card slot (102) and the first guide groove (103) respectively.

8. A multi-segment variable diameter combined screw as described in claim 5, characterized in that, The metering section (3) includes a metering screw (301), and a second slot (302) is provided on the inner side of the right end of the metering screw (301). A set of second guide slots (303) are symmetrically provided on both sides of the second slot (302).

9. A multi-segment variable diameter combined screw as described in claim 8, characterized in that, The diameter of the left end of the compression screw (201) is the same as the diameter of the metering screw (301). The second locking block (204) and the second guide rod (205) at the left end of the compression screw (201) can be matched and engaged in the second locking groove (302) and the second guide groove (303) respectively.

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