Screw shaft sealing device

Abstract

The utility model discloses a screw shaft sealing device which comprises a main body assembly, a machine shell, a feeding hopper, a discharging pipe, a sealing cover, a pull ring and a bolt, and the sealing cover is arranged at one end of the machine shell; the assembling assembly comprises a screw shaft body, a coupler, a positioning shaft, a bearing, a rotating shaft, a rotating seat, a limiting piece, a mounting piece and a sealing piece, the screw shaft body is arranged in the machine shell, the positioning shaft is arranged at one end of the screw shaft body, the rotating seat is arranged in the sealing cover, the mounting piece is arranged in the rotating seat, and the sealing piece is arranged on the outer side of the positioning shaft. The screw shaft has the advantages that the sealing piece is arranged in the machine shell of the extruder, materials can be prevented from flowing into various parts when the screw shaft body rotates to convey the flowing materials, meanwhile, the materials cannot leak out of the extruder, the screw shaft body can be conveniently taken out of the machine shell by opening the sealing cover, and the screw shaft is convenient to use. Various assembling parts connected with the screw shaft body can be disassembled through the mounting pieces.

Description

TECHNICAL FIELD

[0001] The utility model relates to extruder screw shaft technical field, especially a screw shaft sealing device. BACKGROUND

[0002] The extruder screw shaft is one of the core components of the extruder, and its design and performance directly affect the working efficiency and product quality of the extruder. The main function of the extruder screw shaft is to transport materials from the feed port to the discharge port through rotary motion, and to heat, melt, mix and plasticize the materials during the transportation process.

[0003] When the extruder screw shaft transports materials, the materials have a certain fluidity. Since the screw shaft is installed together with various parts such as shafts and bearings, these parts are installed in the extruder. However, if the sealing performance of the periphery of these parts is poor, when the screw shaft rotates, the flowing materials may flow into the various parts, causing damage to the parts. At the same time, the flowing materials may also pass through the various parts and leak out of the extruder, causing environmental pollution and wasting materials. Some existing extruders are provided with sealing devices, but after sealing, the screw shaft and various assembled parts in the extruder are not convenient to disassemble and take out, which leads to difficulty in repairing and replacing the parts after long-term use. SUMMARY

[0004] This section aims to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification and the utility model name. Such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In view of the above and / or existing problems in the screw shaft sealing device, the utility model is proposed.

[0006] Therefore, the problem to be solved by the utility model is that when the extruder screw shaft transports materials, the materials have a certain fluidity. Since the screw shaft is installed together with various parts such as shafts and bearings, these parts are installed in the extruder. However, if the sealing performance of the periphery of these parts is poor, when the screw shaft rotates, the flowing materials may flow into the various parts, causing damage to the parts. At the same time, the flowing materials may also pass through the various parts and leak out of the extruder, causing environmental pollution and wasting materials. Some existing extruders are provided with sealing devices, but after sealing, the screw shaft and various assembled parts in the extruder are not convenient to disassemble and take out, which leads to difficulty in repairing and replacing the parts after long-term use.

[0007] To solve the above technical problems, the utility model provides technical scheme as follows: A screw shaft sealing device, it includes main part assembly, including casing, feed hopper, discharge pipe, cover, pull ring and bolt, the feed hopper is communicated in the casing top, the discharge pipe is communicated in the casing one end, the cover is arranged in the other end of casing, the pull ring is fixed in the cover outside, the bolt is screwed in the cover and casing inner wall, assembly component is set up in the casing inside, including screw shaft body, shaft coupling, positioning shaft, bearing, pivot, rotating seat, limiting piece, mounting piece and sealing element, the screw shaft body is set up in the casing inside, the positioning shaft is set up in the screw shaft body one end, the shaft coupling is installed between the screw shaft body and positioning shaft, the bearing is installed in the cover inner wall, the pivot is rotatably connected in the bearing inner wall, the rotating seat is set up in the cover inside, the limiting piece is set up between the rotating seat and cover, the mounting piece is set up in the rotating seat inside, the sealing element is set up in the positioning shaft outside.

[0008] As a preferred scheme of the screw shaft sealing device of the utility model, wherein: the limiting piece includes limiting groove and limiting ring, the limiting groove is opened in the cover inner wall, the limiting ring is rotatably connected in the limiting groove inner wall, the limiting ring is fixed in the rotating seat outside.

[0009] As a preferred scheme of the screw shaft sealing device of the utility model, wherein: the mounting piece includes clamping seat, clamping groove and clamping strip, the clamping seat is set up in the rotating seat inside, the clamping groove is opened in the rotating seat inner wall, the clamping strip is clamped in the clamping groove inner wall, the clamping strip is fixed in the clamping seat outside.

[0010] As a preferred scheme of the screw shaft sealing device of the utility model, wherein: the mounting piece still includes first limiting hole, the first limiting hole is opened in the clamping strip inner wall.

[0011] As a preferred scheme of the screw shaft sealing device of the utility model, wherein: the mounting piece still includes first empty slot, first spring and first limiting pin, the first empty slot is opened in the rotating seat inner wall, the first spring is fixed in the first empty slot inner wall, the first limiting pin is fixed in the first spring one end, the first limiting pin is clamped in the first limiting hole inner wall.

[0012] As a preferred scheme of the screw shaft sealing device of the utility model, wherein: the mounting piece still includes second empty slot and second spring, the second empty slot is opened in the clamping strip inner wall, the second spring is fixed in the second empty slot inner wall.

[0013] As a preferred scheme of the screw shaft sealing device, the mounting member further comprises a second limiting pin and a second limiting hole, the second limiting pin is fixed to one end of the second spring, the second limiting hole is arranged in the inner wall of the positioning shaft, and the second limiting pin is clamped in the inner wall of the second limiting hole.

[0014] As a preferred scheme of the screw shaft sealing device, the sealing member comprises a sealing plate, and the sealing plate is fixed to the outer side of the positioning shaft.

[0015] As a preferred scheme of the screw shaft sealing device, the sealing member further comprises an upper blocking plate and a lower blocking plate, the upper blocking plate is fixed to one side of the sealing plate, and the lower blocking plate is fixed to one side of the cover.

[0016] As a preferred scheme of the screw shaft sealing device, the sealing member further comprises a sealing groove and a sealing ring, the sealing groove is arranged in the upper blocking plate and the lower blocking plate, and the sealing ring is arranged in the sealing groove.

[0017] The screw shaft sealing device has the following beneficial effects: the sealing member arranged in the shell of the extruder can prevent the material from flowing into various parts when the screw shaft body rotates to convey the material, so that the parts are not damaged, and the material cannot leak outside the extruder to pollute the environment; the cover can be opened to facilitate the removal of the screw shaft body from the shell; and the mounting member can be used to disassemble various assembly parts connected to the screw shaft body, thereby improving the convenience during maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0019] Figure 1 It is the main component structure diagram of the screw shaft sealing device.

[0020] Figure 2 It is the assembly component structure diagram of the screw shaft sealing device.

[0021] Figure 3 It is the internal structure diagram of the cover of the screw shaft sealing device.

[0022] Figure 4 It is the Figure 3 It is the enlarged structure diagram of A in the middle.

[0023] Figure 5 Figure 2 is a structure diagram of the connection between the cover, the clamping seat and the positioning shaft of the screw shaft sealing device.

[0024] Figure 6 Figure 3 is a structure diagram of the internal disassembly of the rotating seat of the screw shaft sealing device.

[0025] In the figure, 100 is a main body assembly, 101 is a casing, 102 is a feeding hopper, 103 is a discharging pipe, 104 is a cover, 105 is a pull ring, 106 is a bolt, 200 is an assembled assembly, 201 is a screw shaft body, 202 is a shaft coupling, 203 is a positioning shaft, 204 is a bearing, 205 is a rotating shaft, 206 is a rotating seat, 207 is a limiting piece, 207a is a limiting groove, 207b is a limiting ring, 208 is a mounting piece, 208a is a clamping seat, 208b is a clamping groove, 208c is a clamping strip, 208d is a first limiting hole, 208e is a first hollow groove, 208f is a first spring, 208g is a first limiting pin, 208h is a second hollow groove, 208i is a second spring, 208j is a second limiting pin, 208k is a second limiting hole, 209 is a sealing piece, 209a is a sealing plate, 209b is an upper blocking plate, 209c is a lower blocking plate, 209d is a sealing groove, and 209e is a sealing ring. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the present application more apparent, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0027] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in other ways that are not consistent with the description, and those skilled in the art can make similar generalizations without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0028] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. In this specification, "in one embodiment" does not mean the same embodiment, nor does it mean an embodiment that is separate or selectively excluded from other embodiments.

[0029] Embodiment 1

[0030] Reference Figures 1-6For the first embodiment of the utility model, this embodiment provides a screw shaft sealing device, screw shaft sealing device includes main part assembly 100 and assembly assembly 200, main part assembly 100 can be convenient extruder shell 101 and cover 104 assembly disassembly, assembly assembly 200 can be convenient to the screw shaft body 201 inside the shell 101 installation and disassembly, and convenient screw shaft body 201 work, to it sealed.

[0031] Main part assembly 100, including shell 101, feed hopper 102, discharge pipe 103, cover 104, pull ring 105 and bolt 106, feed hopper 102 is communicated at the top of shell 101, discharge pipe 103 is communicated at one end of shell 101, cover 104 is set up at the other end of shell 101, pull ring 105 is fixed on the outside of cover 104, and bolt 106 is screw connected on the inner wall of cover 104 and shell 101.

[0032] Shell 101 can place screw shaft body 201, feed hopper 102 can be convenient to process material into shell 101, fall into screw shaft body 201, discharge pipe 103 can be convenient material processing extrusion, cover 104 is used to block shell 101, pull ring 105 is used to pull cover 104 from shell 101 and take out, bolt 106 is used to connect and fix shell 101 and cover 104, and convenient disassembly.

[0033] Assembly assembly 200, set up inside shell 101, including screw shaft body 201, coupling 202, positioning shaft 203, bearing 204, rotating shaft 205, rotating seat 206, limiting piece 207, mounting piece 208 and sealing piece 209, screw shaft body 201 is set up inside shell 101, positioning shaft 203 is set up at one end of screw shaft body 201, coupling 202 is installed between screw shaft body 201 and positioning shaft 203, bearing 204 is installed on the inner wall of cover 104, rotating shaft 205 is rotatably connected on the inner wall of bearing 204, rotating seat 206 is set up inside cover 104, limiting piece 207 is set up between rotating seat 206 and cover 104, mounting piece 208 is set up inside rotating seat 206, and sealing piece 209 is set up on the outside of positioning shaft 203.

[0034] The screw shaft body 201 is used for stirring and extruding the material in the shell 101, the coupling 202 is used for connecting the screw shaft body 201 and the positioning shaft 203 and facilitating dismounting, the positioning shaft 203 can be connected with the rotating base 206, thereby connecting the screw shaft body 201 with the rotating base 206, the bearing 204 can support the rotating shaft 205 to rotate, thereby improving the stability of the rotating shaft 205 and the stability of the screw shaft body 201, the rotating shaft 205 is used for connecting a driving motor and rotating by the motor, thereby driving the screw shaft body 201 to rotate, the rotating base 206 is installed in the cover 104 and used for connecting the rotating shaft 205 and facilitating the positioning shaft 203 to be installed in the rotating base 206, the limiting piece 207 is used for improving the stability of the rotating base 206, the mounting piece 208 is used for mounting and dismounting the positioning shaft 203, and the sealing piece 209 is used for improving the sealing performance of the shell 101 when the screw shaft body 201 works, thereby preventing the material from falling into other parts and damaging the parts.

[0035] Embodiment 2

[0036] With reference to Figures 3-6 For the second embodiment of the utility model, the embodiment is based on the previous embodiment.

[0037] Specifically, the limiting piece 207 comprises a limiting groove 207a and a limiting ring 207b, the limiting groove 207a is arranged on the inner wall of the cover 104, and the limiting ring 207b is rotatably connected to the inner wall of the limiting groove 207a and fixed to the outer side of the rotating base 206.

[0038] The limiting groove 207a is provided with two symmetrical limiting grooves 207a, and the limiting ring 207b is rotatably connected to the inner wall of the limiting groove 207a. Since the limiting ring 207b is fixed to the outer side of the rotating base 206, the rotating base 206 can stably rotate in the cover 104.

[0039] Specifically, the mounting piece 208 comprises a clamping seat 208a, a clamping groove 208b and a clamping strip 208c, the clamping seat 208a is arranged in the rotating base 206, the clamping groove 208b is arranged on the inner wall of the rotating base 206, and the clamping strip 208c is clamped to the inner wall of the clamping groove 208b and fixed to the outer side of the clamping seat 208a.

[0040] The clamping seat 208a is used for mounting the positioning shaft 203 and arranged in the rotating base 206, the clamping groove 208b is arranged on the inner wall of the rotating base 206 and provided with four annular arrays, the clamping strip 208c is matched with the inner diameter of the clamping groove 208b, the clamping strip 208c is arranged in four parts and opposite to the four clamping grooves 208b, and since the clamping strip 208c is fixed to the outer side of the clamping seat 208a, the clamping seat 208a can be clamped to the rotating base 206 when the clamping strip 208c is clamped to the clamping groove 208b.

[0041] Specifically, the mounting piece 208 further comprises a first limiting hole 208d, which is arranged on the inner wall of the clamping strip 208c.

[0042] The first limiting hole 208d is arranged on the inner wall of the clamping strip 208c, and two symmetrical first limiting holes 208d are arranged in each clamping strip 208c.

[0043] Specifically, the mounting piece 208 further comprises a first empty slot 208e, a first spring 208f and a first limiting pin 208g. The first empty slot 208e is arranged on the inner wall of the rotating seat 206, the first spring 208f is fixed to the inner wall of the first empty slot 208e, and the first limiting pin 208g is fixed to one end of the first spring 208f and is clamped to the inner wall of the first limiting hole 208d.

[0044] The first empty slot 208e is arranged on the inner wall of the rotating seat 206, and the number and position of the first empty slot 208e are opposite to those of the first limiting hole 208d. The first spring 208f is installed in the first empty slot 208e, and the first limiting pin 208g can be reset after moving by the elastic force of the first spring 208f, so that the first limiting pin 208g can be clamped into the first limiting hole 208d.

[0045] Specifically, the mounting piece 208 further comprises a second empty slot 208h and a second spring 208i. The second empty slot 208h is arranged on the inner wall of the clamping strip 208c, and the second spring 208i is fixed to the inner wall of the second empty slot 208h.

[0046] The second empty slot 208h is arranged on the inner wall of the clamping strip 208c, and the number of the second empty slot 208h is four and arranged in a ring array. The second spring 208i is arranged in the second empty slot 208h, and the second limiting pin 208j can be reset after moving by the elastic force of the second spring 208i, so that the second limiting pin 208j can be clamped into the second limiting hole 208k.

[0047] Specifically, the mounting piece 208 further comprises a second limiting pin 208j and a second limiting hole 208k. The second limiting pin 208j is fixed to one end of the second spring 208i, the second limiting hole 208k is arranged on the inner wall of the positioning shaft 203, and the second limiting pin 208j is clamped to the inner wall of the second limiting hole 208k.

[0048] After the second limiting pin 208j is clamped to the second limiting hole 208k, the positioning shaft 203 can be clamped to the clamping seat 208a, so that the positioning shaft 203 is connected to the rotating seat 206.

[0049] Embodiment 3

[0050] Reference Figures 3-6 For the third embodiment of the utility model, the embodiment is based on the previous two embodiments.

[0051] Specifically, the sealing member 209 comprises a sealing plate 209a, which is fixed outside the positioning shaft 203.

[0052] The outer diameter of the sealing plate 209a is slightly smaller than the inner diameter of the shell 101. When the positioning shaft 203 rotates, the sealing plate 209a rotates synchronously with the positioning shaft 203 in the shell 101, so as to prevent the material conveyed by the screw shaft body 201 from entering the rotating seat 206.

[0053] Specifically, the sealing member 209 further comprises an upper blocking plate 209b and a lower blocking plate 209c. The upper blocking plate 209b is fixed to one side of the sealing plate 209a, and the lower blocking plate 209c is fixed to one side of the cover 104.

[0054] The upper blocking plate 209b and the lower blocking plate 209c are used in cooperation, so as to perform secondary sealing and prevent the accidental entry of impurities.

[0055] Specifically, the sealing member 209 further comprises a sealing groove 209d and a sealing ring 209e. The sealing groove 209d is arranged on the upper blocking plate 209b and the lower blocking plate 209c, and the sealing ring 209e is arranged inside the sealing groove 209d.

[0056] The sealing groove 209d is used for placing the sealing ring 209e, and the sealing ring 209e is used for blocking and sealing when the upper blocking plate 209b and the lower blocking plate 209c are used in cooperation.

[0057] In use, the staff member drives the rotating shaft 205 to rotate by the driving motor, the rotating shaft 205 drives the rotating seat 206 to rotate in the cover 104, the cover 104 is installed at one end of the shell 101, the rotating seat 206 drives the positioning shaft 203 to rotate, and then drives the screw shaft body 201 to rotate. The material is poured into the shell 101 through the feeding hopper 102 and falls on the screw shaft body 201. The screw shaft body 201 rotates to push the material and extrude the material from the discharge pipe 103. When the screw shaft body 201 works, the sealing member 209 can be used for secondary blocking and sealing of the material, so as to prevent the material from flowing into the rotating seat 206 and damaging various assembled parts. When the internal parts of the screw shaft body 201 or the rotating seat 206 need to be disassembled, repaired or replaced, the cover 104 can be pulled out of the shell 101 by opening the bolt 106. The internal parts of the rotating seat 206 are disassembled by the mounting member 208, and the screw shaft body 201 is separated from the positioning shaft 203 by opening the coupling 202.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A screw shaft sealing device, characterized in that: include, The main component (100) includes a housing (101), a feed hopper (102), a discharge pipe (103), a cover (104), a pull ring (105), and a bolt (106). The feed hopper (102) is connected to the top of the housing (101), the discharge pipe (103) is connected to one end of the housing (101), the cover (104) is disposed at the other end of the housing (101), the pull ring (105) is fixed to the outside of the cover (104), and the bolt (106) is threadedly connected to the cover (104) and the inner wall of the housing (101). An assembly component (200), disposed inside the housing (101), includes a screw shaft body (201), a coupling (202), a positioning shaft (203), a bearing (204), a rotating shaft (205), a rotating seat (206), a limiting component (207), a mounting component (208), and a sealing component (209). The screw shaft body (201) is disposed inside the housing (101), the positioning shaft (203) is disposed at one end of the screw shaft body (201), and the coupling (202) is mounted on the screw shaft. Between the shaft body (201) and the positioning shaft (203), the bearing (204) is installed on the inner wall of the cover (104), the rotating shaft (205) is rotatably connected to the inner wall of the bearing (204), the rotating seat (206) is disposed inside the cover (104), the limiting member (207) is disposed between the rotating seat (206) and the cover (104), the mounting member (208) is disposed inside the rotating seat (206), and the sealing member (209) is disposed outside the positioning shaft (203).

2. The screw shaft sealing device as described in claim 1, characterized in that: The limiting member (207) includes a limiting groove (207a) and a limiting ring (207b). The limiting groove (207a) is formed on the inner wall of the cover (104). The limiting ring (207b) is rotatably connected to the inner wall of the limiting groove (207a). The limiting ring (207b) is fixed to the outside of the rotating seat (206).

3. The screw shaft sealing device as described in claim 1, characterized in that: The mounting component (208) includes a card holder (208a), a card slot (208b), and a card strip (208c). The card holder (208a) is disposed inside the rotating seat (206), the card slot (208b) is formed on the inner wall of the rotating seat (206), the card strip (208c) is engaged with the inner wall of the card slot (208b), and the card strip (208c) is fixed to the outside of the card holder (208a).

4. The screw shaft sealing device as described in claim 3, characterized in that: The mounting component (208) further includes a first limiting hole (208d), which is formed on the inner wall of the card strip (208c).

5. The screw shaft sealing device as described in claim 4, characterized in that: The mounting component (208) further includes a first slot (208e), a first spring (208f), and a first limiting pin (208g). The first slot (208e) is formed on the inner wall of the rotating seat (206). The first spring (208f) is fixed to the inner wall of the first slot (208e). The first limiting pin (208g) is fixed to one end of the first spring (208f) and is engaged with the inner wall of the first limiting hole (208d).

6. The screw shaft sealing device as described in claim 3, characterized in that: The mounting component (208) further includes a second slot (208h) and a second spring (208i). The second slot (208h) is formed on the inner wall of the retaining strip (208c), and the second spring (208i) is fixed to the inner wall of the second slot (208h).

7. The screw shaft sealing device as described in claim 6, characterized in that: The mounting component (208) further includes a second limiting pin (208j) and a second limiting hole (208k). The second limiting pin (208j) is fixed to one end of the second spring (208i), and the second limiting hole (208k) is opened in the inner wall of the positioning shaft (203). The second limiting pin (208j) is engaged with the inner wall of the second limiting hole (208k).

8. The screw shaft sealing device as described in claim 1, characterized in that: The seal (209) includes a sealing plate (209a) which is fixed to the outside of the positioning shaft (203).

9. The screw shaft sealing device as described in claim 8, characterized in that: The sealing element (209) further includes an upper baffle plate (209b) and a lower baffle plate (209c), the upper baffle plate (209b) being fixed to one side of the sealing plate (209a) and the lower baffle plate (209c) being fixed to one side of the cover (104).

10. The screw shaft sealing device as described in claim 9, characterized in that: The sealing element (209) further includes a sealing groove (209d) and a sealing ring (209e). The sealing groove (209d) is formed in the upper baffle plate (209b) and the lower baffle plate (209c), and the sealing ring (209e) is disposed inside the sealing groove (209d).

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