Pipe chain conveying equipment for polyformaldehyde production

Abstract

The invention provides pipe chain conveying equipment for polyformaldehyde production, and relates to the field of POM powder sealing conveying equipment.The pipe chain conveying equipment comprises a pipe chain conveyor body, the pipe chain conveyor body comprises a driving box, a tensioning box, a feeding hopper and a three-way pipe, the feeding hopper and the three-way pipe are communicated with a conveying pipeline of the pipe chain conveyor body, and the driving box is communicated with a discharging port; one end of the driving roller penetrates through the driving box and is sequentially connected with a first sealing assembly and a driving assembly; according to the device, two modes of framework oil sealing and sealing shell nitrogen sealing are additionally arranged on the basis of original packing single-mode sealing, so that the sealing effect of the tensioning box and the driving box is further improved, and it can be effectively guaranteed that no external water or impurities enter the pipe chain conveyor body from the driving roller and the driven roller subsequently; and meanwhile, in the POM powder conveying process, the situation that formaldehyde gas and powder overflow from the driving roller and the driven roller is avoided, and the safety performance in the POM powder conveying process is improved.

Description

Technical Field

[0001] The invention relates to the field of POM powder sealing conveying equipment, in particular to a pipe chain conveying equipment used for polyoxymethylene production. Background Art

[0002] In the production process of polyoxymethylene, the product after polymerization is in powder form, and the powder needs to be transported later. At this time, the powder is transported by a tube chain conveyor. The tube chain conveyor transports the material in a sealed pipe, and uses the chain plate as a transmission component to drive the material to move along the sealed pipe. It is a commonly used equipment for conveying bulk materials such as powders, small particles and small blocks. It has the advantages of dust prevention, long conveying distance, improved labor efficiency and reduced labor intensity.

[0003] The tensioning box and the output end of the drive box in the existing tube chain conveyor are both sealed with packing. However, during the simple packing sealing process, impurities such as moisture and external dust will be mixed into the tube chain conveyor. Once mixed, it is easy to affect the normal operation of the internal drive components. At the same time, if the powder overflows, the formaldehyde gas in it will cause harm to the personal safety of the staff. In severe cases, dust explosion accidents may occur. In summary, the safety sealing effect of the tube chain conveyor during use needs to be further improved. Summary of the invention

[0004] The purpose of the present invention is to solve the problems raised in the above background technology, and then propose a pipe chain conveying equipment for polyoxymethylene production.

[0005] The technical solution adopted by the present invention to solve the technical problem is:

[0006] A pipe chain conveying device for polyoxymethylene production comprises a pipe chain conveyor body, the pipe chain conveyor body comprises a driving box, a tensioning box, a feed hopper and a tee pipe connected to the conveying pipeline thereof, the driving box is connected to the discharge port and an active roller is arranged in the driving box, one end of the active roller passes through the driving box and is sequentially connected to a first sealing component and a driving component, a driven roller is arranged in the tensioning box and both ends of the driven roller pass through the tensioning box and are respectively connected to a second sealing component, the first sealing component and the second sealing component both comprise fillers, and also comprise sealing rings, a fixing component and an annular airbag respectively welded on the driving box and the tensioning box,

[0007] The first sealing assembly also includes an active end oil seal, a first sealing shell connected to a nitrogen source and covered on the outside of the active roller, and a mounting ring arranged on the first sealing shell, the bottom surface of the mounting ring is flush with the bottom surface of the first sealing shell, the outer wall of the mounting ring is matched with the inner wall of the sealing ring welded on the drive box and connected through a fixing assembly, and an annular airbag is arranged on the sealing ring on the drive box so that the mounting ring is connected to the sealing ring on the drive box to form a wrapped seal;

[0008] The second sealing assembly also includes a driven end oil seal, a second sealing shell connected to a nitrogen source and covering the outside of the driven roller, and a mounting ring arranged on the second sealing shell, the bottom surface of the mounting ring is flush with the bottom surface of the second sealing shell, the outer wall of the mounting ring is matched with the inner wall of the sealing ring welded on the tensioning box and is connected through a fixing assembly, and an annular airbag is arranged on the sealing ring on the tensioning box so that when the mounting ring is connected to the sealing ring on the tensioning box, a wrapped seal is formed.

[0009] Furthermore, the annular airbag and the first sealing shell or the second sealing shell are connected to the same nitrogen source so that nitrogen is filled into the first sealing shell or the second sealing shell to seal the active roller or the driven roller, and at the same time, the annular airbag is filled with air, so that the mounting ring fits tightly with the sealing ring on the drive box or the sealing ring on the tensioning box.

[0010] Furthermore, the annular airbag is connected to different air sources with the first sealed shell or the second sealed shell.

[0011] In the above scheme, the gas source for inflating the annular airbag can be nitrogen or other gases, and the gas for inflating the sealing shell is nitrogen.

[0012] Furthermore, the fixing assembly includes a contact detection member, a spring, a slide rail, a slider, a rubber block and an electromagnet. The mounting rings on the first sealing shell and the second sealing shell are symmetrically provided with mounting grooves, and the tensioning box and the driving box are respectively provided with stainless steel plug posts corresponding to and matching the mounting grooves one by one. The mounting groove is provided with a slide rail, an electromagnet and an embedded contact detection member. The slide rail is slidably matched with a slider, and the slider is provided with a rubber block and symmetrically distributed springs. One end of the spring is connected to the inner wall of the mounting groove, the rubber block matches the contact detection member, and the electromagnet fits the surface of the stainless steel plug post and is electrically connected to the contact detection member.

[0013] Furthermore, the contact detection element is a pressure sensor or a limit switch and is electrically connected to the nitrogen source so that after receiving the mechanical trigger signal, the contact detection element automatically triggers the inflation command of the annular airbag, the first sealing shell and the second sealing shell to complete the one-touch fixed seal.

[0014] The above scheme can realize the quick disassembly of the first sealing shell and the second sealing shell on the driving box and the tensioning box through the fixing assembly. At the same time, the inflation process of the sealing shell and the annular airbag will be triggered when the installation is completed, realizing one-click fixed sealing.

[0015] Furthermore, the tensioning box and the driving box are respectively provided with mounting frames located inside the second sealing shell and the first sealing shell, and the mounting frames are provided with bearings, fluorescent oil stain detectors and oil collecting boxes. The first sealing shell and the second sealing shell are respectively provided with alarms that are independently electrically connected to the two fluorescent oil stain detectors.

[0016] The above scheme can perform real-time detection of the area outside the oil seal of the active roller and the driven roller through the fluorescent oil stain detector. If oil stains are found, it indicates that the active end oil seal or the driven roller oil seal is faulty. The fluorescent oil stain detector then feeds back a signal to the controller, which then controls the alarm to quickly remind the staff to come and deal with it, and intelligently monitors the use status of the oil seal. At the same time, if oil leakage occurs, the oil will drip into the oil collecting box. When the sealing shell is manually disassembled, the oil collecting box can be cleaned.

[0017] Furthermore, one end of the active roller is connected to the driving assembly via a short-section flange, and a plurality of reinforcing ribs are provided between the first sealing shell and the short-section flange.

[0018] In order to ensure the installation stability and firmness of the drive assembly, the above scheme connects the active roller and the drive assembly through a matching flange short section and welds multiple reinforcing ribs on this basis to improve the supporting strength of the drive assembly.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In addition to the original single-way sealing of the packing, this device has two additional ways: skeleton oil seal and sealing shell nitrogen seal, which further improves the sealing effect of the tension box and the driving box, and can effectively ensure that no external moisture or impurities will enter the inside of the tube chain conveyor body from the active roller and the driven roller in the future. At the same time, during the conveying of POM powder, no formaldehyde gas and powder will overflow from the active roller and the driven roller, and the safety performance of the POM powder conveying process is improved;

[0021] 2. While the device effectively seals the shaft ends of the active roller and the driven roller, the sealing effect of the first sealing shell and the second sealing shell after installation is also effectively guaranteed. The sealing shell is easy to install and after installation, the sealing shell is automatically inflated with nitrogen immediately through the mechanical signal feedback of the contact detection component. At the same time, the annular airbag is automatically inflated, thereby ensuring the wrapping sealing effect of the joint gap between the installation ring and the sealing ring, and realizing a one-button fixed sealing process;

[0022] 3. This device can perform real-time detection of the area outside the oil seal of the active roller and the driven roller through a fluorescent oil stain detector. If oil stains are found, it indicates that the active end oil seal or the driven roller oil seal is faulty. The fluorescent oil stain detector then feeds back a signal to the controller, which then controls the alarm to quickly remind the staff to come and handle it. It intelligently monitors the use status of the oil seal. At the same time, if oil leakage occurs, the oil will drip into the oil receiving box. When the sealing shell is manually disassembled, the oil receiving box can be cleaned. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the installation of the first sealing component;

[0025] Figure 3 This is a schematic diagram of installing the second sealing assembly;

[0026] Figure 4 This is a schematic diagram of the sealing ring installation;

[0027] Figure 5 for Figure 4 A partial enlarged view of the label A;

[0028] Figure 6 This is a schematic diagram of the installation of the fluorescent oil stain detector;

[0029] Reference numerals:

[0030] 1. Tube chain conveyor body; 11. Feed hopper; 12. Tee pipe; 2. Drive box; 201. Discharge port; 21. Active roller; 22. Active end oil seal; 23. Bearing; 24. First sealing shell; 26. Drive assembly; 3. Tension box; 301. Stainless steel plug column; 31. Driven roller; 32. Driven end oil seal; 34. Second sealing shell; 36. Fluorescent oil stain detector; 37. Oil collecting box; 38. Alarm; 41. Mounting ring; 42. Mounting groove; 43. Contact detection part; 44. Spring; 45. Slide rail; 46. Sliding block; 47. Rubber block; 48. Electromagnet; 5. Sealing ring; 51. Annular airbag. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The present invention is further described in combination with the drawings and embodiments:

[0032] like Figures 1 to 6As shown, a pipe chain conveying device for polyoxymethylene production includes a pipe chain conveyor body 1, the pipe chain conveyor body 1 includes a driving box 2, a tensioning box 3, a feed hopper 11 connected to its conveying pipeline, and a tee pipe 12 (the function of the tee pipe 12 is to change the flow direction of POM powder conveying), the driving box 2 is connected to the discharge port 201, and an active roller 21 is arranged in the driving box 2, one end of the active roller 21 passes through the driving box 2 and is connected to a first sealing component and a driving component 26 in sequence, a driven roller 31 is arranged in the tensioning box 3, and both ends of the driven roller 31 pass through the tensioning box 3 and are respectively connected to a second sealing component, the first sealing component and the second sealing component both include fillers, (it should be noted that the feeding into the pipe chain conveyor body 1 and the discharging process after the conveying are both transmitted in a sealed manner, which will not be described in detail in this application), and also include a sealing ring 5, a fixing component and an annular airbag 51 respectively welded on the driving box 2 and the tensioning box 3,

[0033] The first sealing assembly also includes an active end oil seal 22, a first sealing shell 24 connected to a nitrogen source and covered on the outside of the active roller 21, and a mounting ring 41 arranged on the first sealing shell 24, the bottom surface of the mounting ring 41 is flush with the bottom surface of the first sealing shell 24, the outer wall of the mounting ring 41 is adapted to the inner wall of the sealing ring 5 welded on the drive box 2 and connected through a fixing assembly, and an annular airbag 51 is arranged on the sealing ring 5 on the drive box 2 so that the mounting ring 41 is connected to the sealing ring 5 on the drive box 2 to form a wrapped seal;

[0034] The second sealing assembly also includes a driven end oil seal 32, a second sealing shell 34 connected to a nitrogen source and covering the outside of the driven roller 31, and a mounting ring 41 arranged on the second sealing shell 34. The bottom surface of the mounting ring 41 is flush with the bottom surface of the second sealing shell 34. The outer wall of the mounting ring 41 is adapted to the inner wall of the sealing ring 5 welded on the tensioning box 3 and is connected through a fixing assembly. The sealing ring 5 on the tensioning box 3 is provided with an annular airbag 51 so that when the mounting ring 41 is connected to the sealing ring 5 on the tensioning box 3, a wrapped seal is formed.

[0035] First embodiment: the annular airbag 51 and the first sealing shell 24 or the second sealing shell 34 are connected to the same nitrogen source so that nitrogen is filled into the first sealing shell 24 or the second sealing shell 34 to seal the active roller or the driven roller, and at the same time, the annular airbag 51 is filled with air, so that the mounting ring 41 fits tightly with the sealing ring 5 on the drive box 2 or the sealing ring 5 on the tensioning box 3.

[0036] Second embodiment: the annular airbag 51 is connected to different air sources with the first sealed shell 24 or the second sealed shell 34 .

[0037] Further refinement of the embodiments of the present invention is as follows: Figure 4 and Figure 5As shown, the fixing assembly includes a contact detection member 43, a spring 44, a slide rail 45, a slider 46, a rubber block 47 and an electromagnet 48. The mounting rings 41 on the first sealing shell 24 and the second sealing shell 34 are symmetrically provided with mounting grooves 42, respectively. The tensioning box 3 and the driving box 2 are respectively provided with stainless steel plug posts 301 corresponding to and matching the mounting grooves 42. The mounting grooves 42 are provided with slide rails 45, an electromagnet 48 and an embedded contact detection member 43. The slide rails 45 are slidably matched with sliders 46. The sliders 46 are provided with rubber blocks 47 and symmetrically distributed springs 44. One end of the spring 44 is connected to the inner wall of the mounting groove 42. The rubber block 47 matches the contact detection member 43. The electromagnet 48 fits the surface of the stainless steel plug post 301 and is electrically connected to the contact detection member 43.

[0038] The above embodiment scheme is further refined, such as Figure 5 As shown, the contact detection element 43 is a pressure sensor or a limit switch and is electrically connected to the nitrogen source so that after receiving the mechanical trigger signal, the contact detection element 43 automatically triggers the inflation command of the annular airbag 51, the first sealing shell 24 and the second sealing shell 34 to complete the one-touch fixed seal.

[0039] It should be noted that the nitrogen source, the contact detection member 43 and the electromagnet 48 are all electrically connected to the controller, which is not shown in the figure.

[0040] The workflow of the present invention is:

[0041] First, the active end oil seal 22 and the driven end oil seal 32 are respectively mounted on the active roller 21 and the driven roller 31 to further improve the sealing effect and reduce the possibility of other impurities entering the tube chain conveyor body 1 and the overflow of POM powder during the transportation process of the tube chain conveyor body 1. After the installation is completed, the first sealing shell 24 and the second sealing shell 34 are respectively installed on the drive box 2 and the tension box 3. The installation process is as follows:

[0042] First, align the stainless steel plug 301 with the installation groove 42, and then press the first sealing shell 24 and the second sealing shell 34 in turn to make the stainless steel plug 301 enter the installation groove 42, and then the stainless steel plug 301 will contact the slider 46, and then the slider 46 can be driven to move upward along the slide rail 45. At the same time, the spring 44 is compressed (the significance of setting the spring 44 is to limit the position of the slider 46 when the sealing shell is subsequently disassembled for maintenance or replacement of the sealing assembly). When the rubber block 47 contacts the contact detection member 43, the contact detection member 43 detects a signal and feeds it back to the controller. Then the controller immediately controls the electromagnet 48 to energize to achieve a firm connection between the first sealing shell 24 (the second sealing shell 34) and the drive box 2 (tensioning box 3).

[0043] While locking the sealing shell, the mounting ring 41 will enter the sealing ring 5 and fit with the driving box 2 or the tensioning box 3. The sealing ring 5 can be used to wrap and seal the mounting ring 41 arranged on the first sealing shell 24 and the second sealing shell 34 after they are installed to improve the sealing effect. When the controller controls the electromagnet 48 to be energized, the nitrogen source will be started to supply gas, and then the nitrogen source will be synchronously introduced into the first sealing shell 24, the second sealing shell 34 and the annular airbag 41. At this time, multiple safety seals can be achieved on the shaft end of the active roller 21, the shaft end of the driven roller 31, and the joint gap between the mounting ring 41 and the sealing ring 5, thereby minimizing the probability of external impurities entering or internal formaldehyde gas and powder overflowing.

[0044] At the same time, nitrogen can also isolate the external temperature and reduce the influence of temperature on the oil seal, thereby extending the service life of the oil seal. When the first sealing shell 24 or the second sealing shell 34 needs to be disassembled later, the annular airbag 51 is first deflated and then the electromagnet 48 is powered off by the controller to realize the quick disassembly process of the sealing shell, which greatly reduces the labor intensity of installation and disassembly.

[0045] Compared with the prior art, the device adds two additional sealing methods, namely, a skeleton oil seal and a sealing shell nitrogen seal, on the basis of the original single sealing method of the filler, thereby further improving the sealing effect of the tension box 3 and the driving box 2, and can effectively ensure that no external moisture or impurities will enter the interior of the tube chain conveyor body 1 from the active roller and the driven roller in the future. At the same time, during the conveying of POM powder, no formaldehyde gas and powder will overflow from the active roller and the driven roller, thereby improving the safety performance during the conveying of POM powder;

[0046] While effectively sealing the axial ends of the active roller 21 and the driven roller 31, the sealing effect of the first sealing shell 24 and the second sealing shell 34 after installation is also effectively guaranteed. The sealing shell is easy to install and after installation, the sealing shell is automatically inflated with nitrogen immediately through the mechanical signal feedback of the contact detection component. At the same time, the annular airbag 51 is also automatically inflated, thereby ensuring the wrapping sealing effect of the docking gap between the installation ring 41 and the sealing ring 5, and realizing a one-click fixed sealing process.

[0047] In some embodiments, Figure 6As shown, the tensioning box 3 and the driving box 2 are respectively provided with mounting frames located inside the second sealing shell 34 and the first sealing shell 24 (the mounting frames are shown in the figure without being numbered), and the mounting frames are provided with bearings 23, fluorescent oil stain detectors 36 and oil receiving boxes 37, and the first sealing shell 24 and the second sealing shell 34 are respectively provided with alarms 38 electrically connected independently to the two fluorescent oil stain detectors 36; this embodiment can perform real-time detection of the areas outside the oil seal of the active roller 21 and the driven roller 31 through the fluorescent oil stain detector 36, and if oil stains are found, it indicates that the active end oil seal 22 or the driven end 31 oil seal has a fault, and then the fluorescent oil stain detector 36 feeds back a signal to the controller, and then the controller controls the alarm 38 to work and then quickly remind the staff to come for processing, and intelligently monitor the use status of the oil seal. At the same time, if oil leakage occurs, the oil will drip into the oil receiving box 37, and the oil box 37 can be cleaned after the sealing shell is manually disassembled.

[0048] In other embodiments, Figure 3 As shown, one end of the active roller 21 is connected to the driving assembly 26 through a short-section flange, and a plurality of reinforcing ribs are provided between the first sealing shell 24 and the short-section flange; this embodiment is shown in the figure but not numbered. In order to ensure the installation stability and firmness of the driving assembly 26, this embodiment connects the active roller 21 and the driving assembly 26 through a matching flange short section and welds a plurality of reinforcing ribs on this basis to improve the supporting strength of the driving assembly 26.

[0049] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A pipe chain conveying device for polyoxymethylene production, comprising a pipe chain conveyor body (1), the pipe chain conveyor body (1) comprising a drive box (2), a tension box (3), a feed hopper (11) and a tee pipe (12) connected to the conveying pipeline thereof, the drive box (2) being connected to a discharge port (201) and a driving roller (21) being arranged in the drive box (2), one end of the driving roller (21) passing through the drive box (2) and being connected to a first sealing component and a drive component (26) in sequence, a driven roller (31) being arranged in the tension box (3) and both ends of the driven roller (31) passing through the tension box (3) and being connected to a second sealing component respectively, the first sealing component and the second sealing component both comprising fillers, characterized in that: It also includes a sealing ring (5), a fixing assembly and an annular airbag (51) which are respectively welded on the driving box (2) and the tensioning box (3). The first sealing assembly also includes an active end oil seal (22), a first sealing shell (24) connected to a nitrogen source and arranged outside the active roller (21), and a mounting ring (41) arranged on the first sealing shell (24); the bottom surface of the mounting ring (41) is flush with the bottom surface of the first sealing shell (24); the outer wall of the mounting ring (41) is matched with the inner wall of a sealing ring (5) welded on the drive box (2) and connected via a fixing assembly; and an annular air bag (51) is arranged on the sealing ring (5) on the drive box (2) so that the mounting ring (41) is connected to the sealing ring (5) on the drive box (2) to form a wrapped seal; The second sealing assembly also includes a driven end oil seal (32), a second sealing shell (34) connected to a nitrogen source and covered on the outside of the driven roller (31), and a mounting ring (41) arranged on the second sealing shell (34); the bottom surface of the mounting ring (41) is flush with the bottom surface of the second sealing shell (24); the outer wall of the mounting ring (41) is matched with the inner wall of the sealing ring (5) welded on the tension box (3) and connected through a fixing assembly; the sealing ring (5) on the tension box (3) is provided with an annular air bag (51) so that when the mounting ring (41) is connected to the sealing ring (5) on the tension box (3), a wrapped seal is formed.

2. The pipe chain conveying equipment for polyoxymethylene production according to claim 1, characterized in that: The annular airbag (51) and the first sealing shell (24) or the second sealing shell (34) are connected to the same nitrogen source so that nitrogen is filled into the first sealing shell (24) or the second sealing shell (34) to seal the active roller (21) or the driven roller (31) and the annular airbag (51) is filled at the same time so that the mounting ring (41) and the sealing ring (5) on the driving box (2) or the sealing ring (5) on the tensioning box (3) are tightly fitted.

3. The pipe chain conveying equipment for polyoxymethylene production according to claim 1, characterized in that: The annular air bag (51) is connected to different air sources with the first sealed shell (24) or the second sealed shell (34).

4. The pipe chain conveying equipment for polyoxymethylene production according to claim 1, characterized in that: The fixing assembly comprises a contact detection member (43), a spring (44), a slide rail (45), a slider (46), a rubber block (47) and an electromagnet (48); the mounting rings (41) on the first sealing shell (24) and the second sealing shell (34) are symmetrically provided with mounting grooves (42); the tension box (3) and the drive box (2) are respectively provided with stainless steel plugs (301) corresponding to and matching the mounting grooves (42); the slide rail is provided in the mounting groove (42) (45), an electromagnet (48) and an embedded contact detection piece (43), a slider (46) is slidably matched on the slide rail (45), a rubber block (47) and symmetrically distributed springs (44) are arranged on the slider (46), one end of the spring (44) is connected to the inner wall of the installation groove (42), the rubber block (47) is matched with the contact detection piece (43), the electromagnet (48) is in contact with the surface of the stainless steel plug column (301) and is electrically connected to the contact detection piece (43).

5. The pipe chain conveying equipment for polyoxymethylene production according to claim 4, characterized in that: The contact detection element (43) is a pressure sensor or a limit switch and is electrically connected to a nitrogen source so that the contact detection element (43) automatically triggers the inflation instructions of the annular airbag (51), the first sealing shell (24) and the second sealing shell (34) after receiving a mechanical trigger signal, thereby completing a one-touch fixed seal.

6. The pipe chain conveying equipment for polyoxymethylene production according to claim 1, characterized in that: The tension box (3) and the drive box (2) are respectively provided with mounting frames located inside the second sealing shell (34) and the first sealing shell (24); the mounting frames are provided with bearings (23), a fluorescent oil stain detector (36) and an oil receiving box (37); and the first sealing shell (24) and the second sealing shell (34) are respectively provided with alarms (38) which are independently and electrically connected to the two fluorescent oil stain detectors (36).

7. The pipe chain conveying equipment for polyoxymethylene production according to claim 1, characterized in that: One end of the active roller (21) is connected to the driving assembly (26) via a short flange, and a plurality of reinforcing ribs are arranged between the first sealing shell (24) and the short flange.

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