Powder conveying pipe for PVC (polyvinyl chloride) board production
By introducing screening and scraping components into the powder conveying pipe for PVC board production, the wear problem caused by excessively large powder particles or impurities is solved, achieving efficient screening and clean conveying, and extending the service life of the equipment.
Patent Information
- Application Number
- CN202423322512.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In existing PVC board production powder conveying pipes, excessively large powder particles or impurities cause abnormal wear of the screw inside the conveying pipe, affecting its service life.
A structure including a base, a conveying pipe, a drive motor, a screw, a feeding and screening component, and a scraping component was designed. Through screening and scraping functions, the wear problem caused by powder size not meeting the requirements was solved, and the screening efficiency and adaptability were improved through vibrating screening and telescopic transmission structure.
It effectively prevents powder from accumulating and clogging on the top of the screen plate, improves the service life of the device and the screening speed, reduces the adhesion of powder to the inner wall of the feed hopper, and reduces the risk of equipment wear.
Smart Images
Figure CN223905880U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of PVC board production, and specifically, it mainly relates to a powder conveying pipe for PVC board production. BACKGROUND
[0002] PVC board is called polyvinyl chloride board, which is a widely used plastic board material with good performance and is widely used in building decoration, advertising signs and electronic and electrical shell fields.
[0003] PVC board can be divided into hard PVC and soft PVC, and according to different manufacturing processes, it can be divided into skin foaming board, free foaming board and co-extrusion board, etc. The modern PVC board production process uses environmentally friendly raw materials, does not contain toxic substances, can be recycled and reused, and the corrosion resistance of PVC board can be applied to the fields of chemical industry and pharmacy. PVC board production will use powder conveying pipe to convey PVC powder.
[0004] In the existing PVC board production powder conveying pipe technology, when the particles of the powder are too large or there are other impurities, the screw in the conveying pipe will be abnormally worn, affecting its service life. UTILITY MODEL CONTENTS
[0005] In view of the deficiencies of the prior art, the utility model provides a powder conveying pipe for PVC board production.
[0006] The utility model discloses a powder conveying pipe for PVC board production which includes a base, the top of the base is fixedly connected with a conveying pipe, the end of the conveying pipe is fixedly connected with a driving motor, the driving motor is fixedly connected with a screw at the transmission end, the screw rotates inside the conveying pipe, the top of the base is provided with a feeding assembly, the bottom of the base away from the feeding screen assembly is provided with a discharge port, the base is connected with an extension transmission assembly through the feeding screen assembly, the base is connected with a scraping assembly, a cleaning assembly and a wall scraping assembly through the extension transmission assembly, the base, the conveying pipe, the driving motor, the screw, the feeding screen assembly and the scraping assembly are arranged to form a feeding and screening structure, which realizes the screening function when the powder is fed, solves the problem of abnormal wear of the screw and the conveying pipe caused by the size of the powder not meeting the requirements, and improves the service life of the device.
[0007] Preferably, the feeding screening assembly comprises a feeding hopper, a fixed frame, a first servo motor, a first rotating shaft, a cam, an elastic plate and a sieve plate; the feeding hopper is fixedly connected to the top of the base near the driving motor; the fixed frame is fixedly connected to the side wall of the feeding hopper; the first servo motor is fixedly connected to the inner side wall of the fixed frame near the feeding hopper; the first rotating shaft is fixedly connected to the driving end of the first servo motor; the first rotating shaft is rotatably connected to the middle part of the feeding hopper; the cam is fixedly connected to the middle part of the first rotating shaft; the elastic plate is fixedly connected to the inner side wall of the feeding hopper near the first rotating shaft; and the sieve plate is fixedly connected to the inner side wall of the elastic plate; the setting of the feeding hopper, the fixed frame, the first servo motor, the first rotating shaft, the cam, the elastic plate and the sieve plate forms a vibrating screening structure, realizes the function of vibrating screening of the powder, solves the problem of sieve plate blockage caused by the accumulation of powder on the top of the sieve plate, and improves the screening speed of the sieve plate.
[0008] Preferably, the telescopic transmission comprises a second servo motor, a second rotating shaft, a first spring, a guide shaft and a guide block; the second servo motor is fixedly connected to the top of the feeding hopper; the second rotating shaft is fixedly connected to the driving end of the second servo motor; the first spring is fixedly connected to the inside of the second rotating shaft; the top of the guide shaft is fixedly connected to the end of the first spring away from the second rotating shaft; the guide shaft is rotatably connected to the top of the sieve plate; the guide block is fixedly connected to the outer side wall of the guide shaft; a pair of guide blocks are symmetrically arranged on the outer side wall of the guide shaft; the inner side wall of the second rotating shaft is provided with a guide groove; the second rotating shaft and the guide shaft are slidably connected through the guide block and the guide groove; the side wall of the guide shaft is connected with a scraping assembly and a cleaning assembly; the setting of the second servo motor, the second rotating shaft, the first spring, the guide shaft and the guide block forms a telescopic transmission structure, realizes the function that the guide shaft rotates and moves up and down together with the sieve plate when the sieve plate moves up and down, solves the problem that the scraping assembly and the cleaning assembly cannot cooperate with the sieve plate when the sieve plate moves up and down, and improves the adaptability of the device.
[0009] Preferably, the scraping assembly comprises a first fixed plate, a second spring, a top rod and a first scraper; the first fixed plate is fixedly connected to the outer side wall of the guide shaft away from the second rotating shaft; the second spring is fixedly connected to the inside of the first fixed plate; a plurality of groups of the second spring are evenly distributed in the inside of the first fixed plate; the top of the top rod is fixedly connected to the end of the second spring away from the first fixed plate; and the top of the first scraper is fixedly connected to the bottom end of the plurality of top rods; the setting of the first fixed plate, the second spring, the top rod and the first scraper forms a sieve plate top scraping structure, realizes the function of scraping the powder accumulated on the top of the sieve plate, solves the problem of blockage caused by the accumulation of powder on the top of the sieve plate, improves the screening speed of the sieve plate, and reduces the accumulation of powder on the top of the sieve plate.
[0010] Preferably, the cleaning assembly comprises a second fixed plate and a brush; the second fixed plate is fixedly connected to the outer side wall of the guide shaft away from the first fixed plate; the brush is fixedly connected to the bottom of the second fixed plate; the brush is provided in multiple groups on the bottom of the second fixed plate and is uniformly distributed on the bottom of the second fixed plate; this step forms a top cleaning structure of the sieve plate by the arrangement of the second fixed plate and the brush, realizes the function of cleaning the top of the sieve plate, solves the problem of powder accumulation on the top of the sieve plate, and improves the permeability of the sieve plate.
[0011] Preferably, the wall scraping assembly comprises a rotating frame and a second scraper; one end of the rotating frame is fixedly connected to the outer side wall of the second rotating shaft; a pair of the rotating frames are arranged on the outer side wall of the second rotating shaft and are symmetrically arranged; one group of the rotating frames is fixedly connected to the top of the first fixed plate away from the second rotating shaft; another group of the rotating frames is fixedly connected to the top of the second fixed plate away from the second rotating shaft; the second scraper is fixedly connected to the side wall of the rotating frame away from the second rotating shaft; this step forms a wall scraping structure by the arrangement of the rotating frame and the second scraper, realizes the function of scraping the inner side wall of the feeding hopper, improves the cleanliness of the inner side wall of the feeding hopper, and reduces the problem of powder adhering to the inner side wall of the feeding hopper.
[0012] Preferably, the top of the feeding hopper is hingedly connected with a cover plate; after the powder is added into the feeding hopper, the cover plate is closed to seal the feeding hopper, thereby reducing the problem of abnormal wear of equipment caused by powder splashing onto other equipment.
[0013] The beneficial effects of the present application are:
[0014] 1. The powder conveying pipe for PVC plate production, which comprises a base, a conveying pipe, a driving motor, a screw rod, an inlet powder screening assembly and a scraping assembly, and forms an inlet powder screening structure, so as to realize the function of screening the powder during feeding, solve the problem of abnormal wear of the screw rod and the conveying pipe caused by powder of unsuitable size, and improve the service life of the device.
[0015] 2. The powder conveying pipe for PVC plate production, which comprises a feeding hopper, a fixing frame, a first servo motor, a first rotating shaft, a cam, an elastic plate and a sieve plate, and forms a vibrating screening structure, so as to realize the function of vibrating and screening the powder, solve the problem of sieve plate blockage caused by powder accumulation on the top of the sieve plate, and improve the screening speed of the sieve plate. BRIEF DESCRIPTION OF DRAWINGS
[0016] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:
[0017] Figure 1 It is a perspective view of the present application.
[0018] Figure 2 Figure 1 is a structural schematic diagram of the feeding hopper and the feeding pipe cooperating in the utility model;
[0019] Figure 3 Figure 2 is a structural schematic diagram of the sieve plate and the cam cooperating in the utility model;
[0020] Figure 4 Figure 3 is a structural schematic diagram of the scraper and the first rotating shaft cooperating in the utility model.
[0021] In the drawings, 1, base; 11, feeding pipe; 12, driving motor; 13, screw rod; 2, feeding hopper; 21, fixing frame; 22, first servo motor; 23, first rotating shaft; 24, cam; 25, elastic plate; 26, sieve plate; 3, second servo motor; 31, second rotating shaft; 32, first spring; 33, guide shaft; 34, guide block; 4, first fixing plate; 41, second spring; 42, jacking rod; 43, first scraper; 5, second fixing plate; 51, brush; 6, rotating frame; 61, second scraper; 7, cover plate. DETAILED DESCRIPTION
[0022] In the following, a plurality of embodiments of the utility model will be disclosed by means of drawings. For the purpose of clear illustration, a plurality of practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit the utility model. That is, in some embodiments of the utility model, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and components will be shown in a simple schematic manner in the drawings.
[0023] It should be noted that all directional indications such as up, down, left, right, front, back, etc. in the embodiments of the utility model are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture such as shown in the drawings. If the specific posture changes, the directional indications will also change accordingly.
[0024] In addition, the description such as "first", "second" etc. in the utility model is only for the purpose of description, and does not mean to specially indicate the order or sequence, nor to limit the utility model. It is only to distinguish the conditions or operations described by the same technical terms, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art. When the combination of technical solutions appears to be contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.
[0025] In order to further understand the utility model content, characteristics and effects of the utility model, the following examples are given below, and the drawings are described in detail as follows:
[0026] With reference to Figures 1 to 4 The powder conveying pipe for PVC plate production comprises a base 1, a feeding pipe 11 fixedly connected to the top of the base 1, a driving motor 12 fixedly connected to the end of the feeding pipe 11, a screw rod 13 fixedly connected to the driving end of the driving motor 12, the screw rod 13 rotating inside the feeding pipe 11, a feeding assembly arranged on the top of the base 1, a discharge port arranged on the bottom of the base 1 away from the feeding and screening assembly, an extension transmission assembly connected to the base 1 through the feeding and screening assembly, a scraping assembly, a cleaning assembly and a wall scraping assembly respectively connected to the base 1 through the extension transmission assembly, and the like.
[0027] With reference to Figure 2 and Figure 3The feeding screening assembly comprises a feeding hopper 2, a fixing frame 21, a first servo motor 22, a first rotating shaft 23, a cam 24, an elastic plate 25 and a screen plate 26. The feeding hopper 2 is fixedly connected to the top of the base 1 close to the driving motor 12. The fixing frame 21 is fixedly connected to the side wall of the feeding hopper 2. The first servo motor 22 is fixedly connected to the inner side wall of the fixing frame 21 close to the feeding hopper 2. The first rotating shaft 23 is fixedly connected to the driving end of the first servo motor 22. The first rotating shaft 23 is rotationally connected to the middle part of the feeding hopper 2. The cam 24 is fixedly connected to the middle part of the first rotating shaft 23. The elastic plate 25 is fixedly connected to the inner side wall of the feeding hopper 2 close to the first rotating shaft 23. The screen plate 26 is fixedly connected to the inner side wall of the elastic plate 25. In working, the powder is put into the feeding hopper 2 and falls on the screen plate 26. The first servo motor 22 is started. The first servo motor 22 drives the first rotating shaft 23 and the cam 24 to rotate. The cam 24 pushes the screen plate 26 to move up and down. The elastic plate 25 makes the screen plate 26 and the feeding hopper 2 in flexible connection. The screen plate 26 is reciprocally pushed up by the cam 24 and vibrates to screen the powder. This step realizes the function of vibrating screening of the powder by the setting of the feeding hopper 2, the fixing frame 21, the first servo motor 22, the first rotating shaft 23, the cam 24, the elastic plate 25 and the screen plate 26, solves the problem of the blockage of the screen plate 26 caused by the accumulation of the powder on the top of the screen plate 26 and improves the screening speed of the screen plate 26.
[0028] Referring to Figure 3 and Figure 4, the telescopic transmission comprises a second servo motor 3, a second rotating shaft 31, a first spring 32, a guide shaft 33 and a guide block 34; the second servo motor 3 is fixedly connected to the top of the feeding hopper 2; the second rotating shaft 31 is fixedly connected to the transmission end of the second servo motor 3; the first spring 32 is fixedly connected inside the second rotating shaft 31; the top of the guide shaft 33 is fixedly connected to the end of the first spring 32 away from the second rotating shaft 31; the guide shaft 33 is rotatably connected to the top of the sieve plate 26; the guide block 34 is fixedly connected to the outer side wall of the guide shaft 33; a pair of guide blocks 34 are symmetrically arranged on the outer side wall of the guide shaft 33; a guide groove is formed in the inner side wall of the second rotating shaft 31; the second rotating shaft 31 and the guide shaft 33 are slidably connected through the guide block 34 and the guide groove; the side wall of the guide shaft 33 is connected with a scraping assembly and a cleaning assembly; in work, the second servo motor 3 is started, the second servo motor 3 drives the second rotating shaft 31 and the guide shaft 33 to rotate, the guide shaft 33 rotates on the top of the sieve plate 26, the guide shaft 33 slides inside the second rotating shaft 31 when the sieve plate 26 moves up and down, the guide block 34 plays a guiding role, the first spring 32 is compressed or stretched when the guide shaft 33 slides inside the second rotating shaft 31, so that the scraping assembly and the cleaning assembly are adapted to the sieve plate 26; through the arrangement of the second servo motor 3, the second rotating shaft 31, the first spring 32, the guide shaft 33 and the guide block 34, a telescopic transmission structure is formed, the guide shaft 33 rotates and moves up and down with the sieve plate 26 when the sieve plate 26 moves up and down, the problem that the scraping assembly and the cleaning assembly cannot be matched with the sieve plate 26 when the sieve plate 26 moves up and down is solved, and the adaptability of the device is improved.
[0029] With reference to Figure 4 , the scraping assembly comprises a first fixed plate 4, a second spring 41, a top rod 42 and a first scraper 43; the first fixed plate 4 is fixedly connected to the outer side wall of the guide shaft 33 away from the second rotating shaft 31; the second spring 41 is fixedly connected inside the first fixed plate 4; a plurality of groups of the second spring 41 are arranged inside the first fixed plate 4 and are evenly distributed inside the first fixed plate 4; the top of the top rod 42 is fixedly connected to the end of the second spring 41 away from the first fixed plate 4; the top of the first scraper 43 is fixedly connected to the bottom end of the plurality of top rods 42; in work, the first fixed plate 4, the second spring 41, the top rod 42 and the first scraper 43 are driven to rotate when the guide shaft 33 rotates, the second spring 41 pushes the top rod 42 and the first scraper 43 to move close to the sieve plate 26, so that the first scraper 43 keeps in contact with the sieve plate 26, and the first scraper 43 scrapes the powder accumulated on the top of the sieve plate 26; through the arrangement of the first fixed plate 4, the second spring 41, the top rod 42 and the first scraper 43, a sieve plate top scraping structure is formed, the function of scraping the powder accumulated on the top of the sieve plate 26 is realized, the problem of powder accumulation on the top of the sieve plate 26 is solved, the sieving speed of the sieve plate 26 is improved, and the powder accumulation on the top of the sieve plate 26 is reduced.
[0030] With reference toFigure 4 The cleaning assembly comprises a second fixed plate 5 and a brush 51. The second fixed plate 5 is fixedly connected to the outer side wall of the guide shaft 33 away from the first fixed plate 4. The brush 51 is fixedly connected to the bottom of the second fixed plate 5. The brush 51 is provided in multiple groups at the bottom of the second fixed plate 5 and is uniformly distributed at the bottom of the second fixed plate 5. During work, the guide shaft 33 rotates to drive the second fixed plate 5 and the brush 51 to rotate. The brush 51 contacts the top of the sieve plate 26 to clean the top of the sieve plate 26. This step forms a sieve plate 26 top cleaning structure by the arrangement of the second fixed plate 5 and the brush 51, realizes the function of cleaning the top of the sieve plate 26, solves the problem of powder accumulation on the top of the sieve plate 26, and improves the permeability of the sieve plate 26.
[0031] Referring to Figure 3 and Figure 4 The wall scraping assembly comprises a rotating frame 6 and a second scraper 61. One end of the rotating frame 6 is fixedly connected to the outer side wall of the second rotating shaft 31. The rotating frame 6 is provided in a pair on the outer side wall of the second rotating shaft 31 and is symmetrically arranged. One group of rotating frames 6 is fixedly connected to the top of the first fixed plate 4 away from the second rotating shaft 31. The other group of rotating frames 6 is fixedly connected to the top of the second fixed plate 5 away from the second rotating shaft 31. The second scraper 61 is fixedly connected to the side wall of the rotating frame 6 away from the second rotating shaft 31. During work, the second rotating shaft 31 rotates to drive the rotating frame 6 and the second scraper 61 to rotate. The second scraper 61 contacts the inner side wall of the feed hopper 2 to scrape off the powder adhered to the inner side wall of the feed hopper 2. This step forms a wall scraping structure by the arrangement of the rotating frame 6 and the second scraper 61, realizes the function of scraping the powder on the inner side wall of the feed hopper 2, improves the cleanliness of the inner side wall of the feed hopper 2, and reduces the problem of powder adhering to the inner side wall of the feed hopper 2.
[0032] Referring to Figure 2 A cover plate 7 is hingedly connected to the top of the feed hopper 2. During work, after the powder is added into the feed hopper 2, the cover plate 7 is closed to seal the feed hopper 2, thereby reducing the problem of dust splashing onto other equipment to cause abnormal wear of the equipment.
[0033] In summary: in the work, the PVC powder is added into the feeding pipe 11 through the feeding and screening assembly, the driving motor 12 is started, the driving motor 12 drives the screw rod 13 to rotate, the screw rod 13 drives the powder to move, so that the powder is discharged from the discharge port, the powder is moved into the feeding and screening assembly, the feeding and screening assembly screens the powder, and the particles and impurities that do not meet the size are screened out, and the scraping assembly rotates and scrapes the powder; the powder is put into the feeding hopper 2 and falls on the sieve plate 26, the first servo motor 22 is started, the first servo motor 22 drives the first rotating shaft 23 and the cam 24 to rotate, the cam 24 pushes the sieve plate 26 to move up and down, the elastic plate 25 makes the sieve plate 26 and the feeding hopper 2 in flexible connection, the sieve plate 26 is reciprocally pushed up by the cam 24 and vibrates, and the powder is screened; the second servo motor 3 is started, the second servo motor 3 drives the second rotating shaft 31 and the guide shaft 33 to rotate, the guide shaft 33 rotates at the top of the sieve plate 26, the guide shaft 33 slides in the second rotating shaft 31 when the sieve plate 26 moves up and down, the guide block 34 plays a guiding role, the first spring 32 is compressed or stretched when the guide shaft 33 slides in the second rotating shaft 31, so that the scraping assembly and the cleaning assembly are adaptively matched with the sieve plate 26; the guide shaft 33 drives the first fixed plate 4, the second spring 41, the top rod 42 and the first scraper plate 43 to rotate when the guide shaft 33 rotates, the second spring 41 pushes the top rod 42 and the first scraper plate 43 to move close to the sieve plate 26, so that the first scraper plate 43 keeps in contact with the sieve plate 26, and the first scraper plate 43 scrapes the powder accumulated at the top of the sieve plate 26; the guide shaft 33 drives the second fixed plate 5 and the brush 51 to rotate when the guide shaft 33 rotates, the brush 51 is in contact with the top of the sieve plate 26 and cleans the top of the sieve plate 26; the second rotating shaft 31 drives the rotating frame 6 and the second scraper plate 61 to rotate when the second rotating shaft 31 rotates, the second scraper plate 61 is in contact with the inner wall of the feeding hopper 2 and scrapes the powder adhered to the inner wall of the feeding hopper 2; after the powder is added into the feeding hopper 2, the cover plate 7 is closed, the feeding hopper 2 is sealed, and the powder dust is prevented from splashing onto other equipment and causing abnormal wear of the equipment.
[0034] The above merely describes the embodiments of the present application and is not intended to limit the present application. The present application can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.
Claims
1. A powder conveying pipe for PVC plate production, comprising a base (1); characterized in that, The base (1) top fixedly connected with the feed pipe (11); the feed pipe (11) end fixedly connected with the drive motor (12); the drive motor (12) transmission end fixedly connected with the screw rod (13); the screw rod (13) rotates inside the feed pipe (11); the base (1) top is equipped with the feed assembly; the base (1) is away from the bottom of the feed screening assembly and is equipped with the discharge port; the base (1) is connected with the telescopic transmission assembly through the feed screening assembly; the base (1) is connected with the scraping assembly, the cleaning assembly and the wall scraping assembly respectively through the telescopic transmission assembly.
2. The powder conveying pipe for PVC sheet production according to claim 1, characterized in that, The feed screening assembly includes a feed hopper (2), a fixed frame (21), a first servo motor (22), a first rotating shaft (23), a cam (24), an elastic plate (25) and a sieve plate (26); the feed hopper (2) is fixedly connected to the top of the base (1) near the drive motor (12); the fixed frame (21) is fixedly connected to the side wall of the feed hopper (2); the first servo motor (22) is fixedly connected to the inner side wall of the fixed frame (21) near the feed hopper (2); the first rotating shaft (23) is fixedly connected to the transmission end of the first servo motor (22); the first rotating shaft (23) is rotatably connected in the middle of the feed hopper (2); the cam (24) is fixedly connected to the middle of the first rotating shaft (23); the elastic plate (25) is fixedly connected to the inner side wall of the feed hopper (2) near the first rotating shaft (23); the sieve plate (26) is fixedly connected to the inner side wall of the elastic plate (25).
3. The powder conveying pipe for PVC sheet production according to claim 2, characterized in that, The telescopic transmission includes a second servo motor (3), a second rotating shaft (31), a first spring (32), a guide shaft (33) and a guide block (34); the second servo motor (3) is fixedly connected to the top of the feed hopper (2); the second rotating shaft (31) is fixedly connected to the transmission end of the second servo motor (3); the first spring (32) is fixedly connected inside the second rotating shaft (31); the top of the guide shaft (33) is fixedly connected to the end of the first spring (32) away from the second rotating shaft (31); the guide shaft (33) is rotatably connected to the top of the sieve plate (26); the guide block (34) is fixedly connected to the outer side wall of the guide shaft (33); a pair of guide blocks (34) are symmetrically arranged on the outer side wall of the guide shaft (33); a guide groove is formed in the inner side wall of the second rotating shaft (31); the second rotating shaft (31) and the guide shaft (33) are slidably connected through the guide block (34) and the guide groove; the side wall of the guide shaft (33) is connected with the scraping assembly and the cleaning assembly.
4. The powder conveying pipe for PVC sheet production according to claim 3, characterized in that, The scraping assembly comprises a first fixed plate (4), a second spring (41), a top rod (42) and a first scraper (43); the first fixed plate (4) is fixedly connected to the outer side wall of the guide shaft (33) away from the second rotating shaft (31); the second spring (41) is fixedly connected inside the first fixed plate (4); the second spring (41) is provided in multiple groups inside the first fixed plate (4) and is uniformly distributed inside the first fixed plate (4); the top rod (42) is fixedly connected at the top to the end of the second spring (41) away from the first fixed plate (4); and the first scraper (43) is fixedly connected at the top to the bottom ends of the multiple top rods (42).
5. The powder conveying pipe for PVC sheet production according to claim 4, characterized in that, The cleaning assembly comprises a second fixed plate (5) and a brush (51); the second fixed plate (5) is fixedly connected to the outer side wall of the guide shaft (33) away from the first fixed plate (4); the brush (51) is fixedly connected to the bottom of the second fixed plate (5); and the brush (51) is provided in multiple groups at the bottom of the second fixed plate (5) and is uniformly distributed at the bottom of the second fixed plate (5).
6. The powder conveying pipe for PVC sheet production according to claim 4, characterized in that, The wall scraping assembly comprises a rotating frame (6) and a second scraper (61); one end of the rotating frame (6) is fixedly connected to the outer side wall of the second rotating shaft (31); the rotating frame (6) is provided in a pair on the outer side wall of the second rotating shaft (31) and is symmetrically arranged; one group of the rotating frame (6) is fixedly connected at the top to the end of the first fixed plate (4) away from the second rotating shaft (31); another group of the rotating frame (6) is fixedly connected at the top to the end of the second fixed plate (5) away from the second rotating shaft (31); and the second scraper (61) is fixedly connected to the side wall of the rotating frame (6) away from the second rotating shaft (31).
7. The powder conveying pipe for PVC sheet production according to claim 2, characterized in that, The feeding hopper (2) is hingedly connected with a cover plate (7) at the top.