Lubricating device applied to spiral feeding equipment and spiral feeding equipment

Abstract

The utility model provides a lubricating device applied to spiral feeding equipment and the spiral feeding equipment, and relates to the technical field of lubrication. The lubricating device comprises an oil cup, a core cylinder is arranged in the oil cup, and the two ends of the core cylinder penetrate through the side wall of the oil cup and extend out of the oil cup. And an oil inlet hole is formed in the side wall of the core cylinder and positioned in the oil cup. A sealing plate is arranged in the core cylinder and located below the oil inlet hole, and an oil outlet hole is formed in the sealing plate. An oil stopping iron chisel is arranged in the core cylinder and located above the sealing plate, and an elastic piece is arranged between the core cylinder and the oil stopping iron chisel. A mounting frame is arranged on the oil cup, and an electromagnet is arranged on the mounting frame and located above the oil stopping iron chisel. According to the lubricating device applied to the spiral feeding equipment and the spiral feeding equipment, the lubricating effect is guaranteed, waste of lubricating oil is avoided, and the stability of a green anode product can be maintained.

Description

TECHNICAL FIELD

[0001] The utility model relates to lubricating technical field, concretely speaking, a kind of lubricating device and spiral feeding equipment applied to spiral feeding equipment. BACKGROUND

[0002] The forming process of the prebaked anode is to mix the carbon raw materials after crushing and grinding with liquid pitch to form a plastic paste, and then to extrude or vibrate to form, and finally to produce carbon blocks with certain strength and density. This process not only involves the control of many aspects such as raw material selection, batching accuracy, grinding purity, screening purity, kneading effect and forming technical parameters, but also directly determines the quality of the prebaked anode carbon block. Therefore, the manufacturing process of the green anode (unfired anode), especially the forming process, is considered as the key link in the manufacture of the prebaked anode.

[0003] Among them, large-scale screw conveyors are needed to transport mixed dry materials to each kneading pot. The conveyor is mainly composed of a motor, a screw shaft, a feed inlet, a discharge outlet, a conveying pipeline and the like. The screw shaft is the main transmission part of the screw feeder, which is used to convey the materials from the feed inlet to the discharge outlet. The screw shaft will generate heat by rubbing against the conveying pipeline during use, which will cause damage to the shaft body. Therefore, an oil cup needs to be placed at the connection between the two ends of the screw shaft for lubrication to reduce the friction and heat generation.

[0004] However, the current oil cup is in a constant open state, that is, whether the conveyor is in a working state or not, the lubricating oil in the oil cup will drip into the rotating gap between the screw shaft and the conveying pipeline. This will cause the following problems:

[0005] First, it causes waste of lubricating oil.

[0006] Second, it causes excessive dripping of lubricating oil, and too much lubricating oil will overflow into the mixed dry materials, damaging the internal structure of the mixed dry materials, causing the imbalance of the particle size distribution, and thus affecting the product quality. INVENTION CONTENTS

[0007] To solve the above problems, the present application provides a lubricating device applied to a spiral feeding equipment and a spiral feeding equipment. The lubricating device can be opened synchronously with the spiral feeding equipment, which not only ensures the lubricating effect and avoids the waste of lubricating oil, but also helps to maintain the stability of the green anode product.

[0008] The technical solution adopted by the utility model to solve its technical problems is:

[0009] A lubricating device applied to a spiral feeding equipment, comprising an oil cup, a core barrel is arranged in the oil cup, and both ends of the core barrel extend to the outside of the oil cup through the side wall of the oil cup.

[0010] The side wall of the core cylinder is provided with an oil inlet hole in the oil cup;

[0011] The core cylinder is provided with a sealing plate below the oil inlet hole, and the sealing plate is provided with an oil outlet hole;

[0012] The core cylinder is provided with a stop iron above the sealing plate, and an elastic member is arranged between the core cylinder and the stop iron;

[0013] The oil cup is provided with a mounting bracket, and the mounting bracket is provided with an electromagnet above the stop iron;

[0014] When the electromagnet is powered, the stop iron moves upward under the attraction of the electromagnet, overcoming the elastic force of the elastic member, and the oil outlet hole is in an open state;

[0015] When the electromagnet loses power, the stop iron moves downward under the elastic restoring force of the elastic member, and blocks the oil outlet hole.

[0016] Further, the upper end of the core cylinder is provided with a cap, the cap is provided with a third avoiding hole allowing the stop iron to pass through, the stop iron is provided with a baffle, and a spring is sleeved on the stop iron between the cap and the baffle.

[0017] Further, the cap is fixedly connected with the core cylinder by screw connection.

[0018] Further, the baffle is in guiding cooperation with the core cylinder.

[0019] Further, the oil cup is provided with a filter cover, the filter cover includes a filter plate sleeved on the outside of the core cylinder, the filter plate is provided with a filter hole, the top end of the filter plate is provided with a top plate, and the top plate is provided with a fourth avoiding hole for accommodating the core cylinder.

[0020] Further, the mounting bracket includes a bent rod, one end of the bent rod is connected with the lower end of the core cylinder, the other end of the bent rod extends above the oil cup after passing around the oil cup, and is fixedly connected with the electromagnet.

[0021] Further, the bending rod comprises a first horizontal section below the oil cup, one end of the first horizontal section is connected with the core barrel, the other end of the first horizontal section is provided with a first vertical section, the upper portion of the oil cup is provided with a second horizontal section, one end of the second horizontal section is connected with the first vertical section, a second vertical section is arranged on the second horizontal section above the oil stop iron, and the electromagnet is connected with the lower end of the second vertical section.

[0022] Further, the other end of the second horizontal section is provided with a third vertical section, the lower end of the third vertical section is provided with a rubber block, and the bending rod is fixedly connected with the core barrel through a hoop.

[0023] Further, the oil cup is provided with an oil injection hole and a plug for plugging the oil injection hole.

[0024] A spiral feeding device comprises a conveying pipe, a screw shaft and a motor, and further comprises a lubricating device, the shaft body of the screw shaft comprises a first supporting end and a second supporting end, the first supporting end and the second supporting end are respectively connected with the conveying pipe through bearing assemblies, the conveying pipe is provided with a first connecting pipe and a second connecting pipe which are respectively connected with the lubricating device and communicate with the rotary gap above the first supporting end and the second supporting end, and the upper ends of the first connecting pipe and the second connecting pipe are respectively connected with the lower end of the core barrel of the lubricating device.

[0025] The spiral feeding device provided by the application has the following beneficial effects:

[0026] The lubricating device provided by the embodiment of the application is provided with an opening mechanism, the lubricating device can be opened or closed through the opening mechanism, and the lubricating device can be opened or closed according to the working state of the spiral feeding device. The lubricating device and the spiral feeding device are started synchronously through the control of the opening mechanism, high-efficiency lubrication can be realized, the waste of lubricating oil can be avoided, the excessive dripping of lubricating oil can be avoided, the internal structure of the mixed dry material can be prevented from being damaged, and the stability and quality of the green anode product can be ensured.

[0027] In addition, in the long term, the use and maintenance cost of lubricating oil can be reduced, and the economy of the whole production process can be improved.

[0028] Meanwhile, the embodiment of the application further provides a spiral feeding device applying the lubricating device, and the same beneficial effects are achieved, and details are not described herein. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 The spiral feeding device provided by the embodiment of the application is provided with a lubricating device, and a three-dimensional structure schematic view of the spiral feeding device is shown in the figure;

[0030] Figure 2 A front view of a spiral feeding device provided with a lubricating device according to an embodiment of the present application;

[0031] Figure 3 A sectional view of A-A in Figure 2 ;

[0032] Figure 4 An enlarged structural schematic view of A part in Figure 3 ;

[0033] Figure 5 A sectional view of B-B in Figure 2 ;

[0034] Figure 6 A perspective structural schematic view of a lubricating device applied to a spiral feeding device according to an embodiment of the present application Figure 1 ;

[0035] Figure 7 A perspective structural schematic view of a lubricating device applied to a spiral feeding device according to an embodiment of the present application Figure 2 ;

[0036] Figure 8 A front view of a spiral feeding device provided with a lubricating device according to an embodiment of the present application;

[0037] Figure 9 A sectional view of C-C in Figure 8 ;

[0038] Figure 10 An enlarged structural schematic view of B part in Figure 9 ;

[0039] Figure 11 An enlarged structural schematic view of C part in Figure 9 ;

[0040] Figure 12 A sectional view of D-D in Figure 8 ;

[0041] Figure 13 A perspective structural schematic view of a lower cover.

[0042] In the figure: 1, lubricating device; 11, oil cup; 111, main cylinder; 112, upper cover; 113, lower cover; 114, sealing plug; 12, core barrel; 121, oil inlet hole; 122, sealing plate; 1221, recess; 13, oil stop iron; 131, baffle; 14, mounting frame; 1411, first horizontal section; 1412, first vertical section; 1413, second horizontal section; 1414, second vertical section; 1415, third vertical section; 142, rubber block; 143, clamp; 1431, first clamp plate; 1432, second clamp plate; 1433, hinge shaft; 1434, bolt assembly; 15, electromagnet; 16, cap; 17, spring; 18, filter cover; 181, filter plate; 1811, filter hole; 182, top plate; 19, back nut;

[0043] 2, conveying pipe; 21, web plate; 22, wing plate; 23, end plate; 231, first support cylinder; 24, cross plate; 25, hanging tile; 251, mounting plate; 252, second support cylinder; 253, hanging plate;

[0044] 31, shaft body; 311, first support end; 312, second support end; 32, helical blade;

[0045] 4, motor;

[0046] 51, first connecting pipe; 52, second connecting pipe. DETAILED DESCRIPTION

[0047] In order for those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings in the embodiments of the present application, and the described embodiments are only some of the embodiments of the present application, not all the embodiments. All other embodiments obtained by those skilled in the art without creative labor on the basis of the embodiments of the present application shall fall within the protection scope of the present application.

[0048] As shown in Figure 6 , Figure 7 , Figure 8 and Figure 9 , a lubricating device applied to a spiral feeding device includes an oil cup 11, the oil cup 11 is provided with a core barrel 12, the upper end of the core barrel 12 extends to the outside of the oil cup 11 through the upper side wall of the oil cup 11, the lower end of the core barrel 12 extends to the outside of the oil cup 11 through the lower side wall of the oil cup 11, the core barrel 12 is sealingly connected with the lower side wall of the oil cup 11, the side wall of the core barrel 12 is provided with an oil inlet hole 121 inside the oil cup 11, and the lubricating oil in the oil cup 11 can enter the core barrel 12 through the oil inlet hole 121.

[0049] The core barrel 12 is provided with a sealing plate 122 below the oil inlet hole 121, and the sealing plate 122 is provided with an oil outlet hole.

[0050] The oil cup 11 is provided with a mounting frame 14, and the mounting frame 14 is provided with an electromagnet 15 above the oil stop iron rod 13. When the electromagnet 15 is powered, the oil stop iron rod 13 is moved upward under the attraction of the electromagnet 15 against the elastic force of the elastic member, the lower end of the oil stop iron rod 13 is separated from the sealing plate 122, and the oil outlet hole is in an open state. At this time, the lubricating oil entering the core barrel 12 through the oil inlet hole 121 can flow out through the oil outlet hole. When the electromagnet 15 loses power, the magnetic force of the electromagnet 15 disappears, the oil stop iron rod 13 moves downward under the elastic restoring force of the elastic member, the lower end of the oil stop iron rod 13 is pressed against the sealing plate 122 again, and the oil outlet hole is sealed, so that the oil outlet hole is in a closed state. At this time, the lubricating oil entering the core barrel 12 through the oil inlet hole 121 cannot flow out through the oil outlet hole.

[0051] As a specific embodiment, the oil cup 11 in the embodiment includes a main barrel 111 in a cylindrical barrel structure with both ends open, and the core barrel 12 is coaxially arranged with the main barrel 111. The upper end of the main barrel 111 is provided with an upper cover 112 for closing the upper end opening of the main barrel 111, and the lower end of the main barrel 111 is provided with a lower cover 113 for closing the lower end opening of the main barrel 111. The upper cover 112 is provided with a first avoiding hole for accommodating the core barrel 12, and the lower cover 113 is provided with a second avoiding hole for accommodating the core barrel 12.

[0052] As a specific embodiment, the lower end of the core barrel 12 is fixedly connected with the lower cover 113 by welding.

[0053] As a specific embodiment, as Figure 11As shown in the figure, the upper end of the core barrel 12 is provided with a cap 16 for closing the opening of the upper end of the core barrel 12, and the upper end of the oil-stopping iron rod 13 extends above the cap 16 through a third avoiding hole provided on the cap 16. A baffle 131 is provided on the oil-stopping iron rod 13 inside the core barrel 12, and the elastic member is a spring 17 sleeved on the oil-stopping iron rod 13, the upper end of the spring 17 abuts against the cap 16, and the lower end of the spring 17 abuts against the baffle 131.

[0054] Further, the cap 16 is fixedly connected with the core barrel 12 in a threaded connection manner. The distance between the upper end surface of the oil-stopping iron rod 13 and the electromagnet 15 can be adjusted by rotating the cap 16.

[0055] Further, the baffle 131 is in a circular structure, and the diameter of the baffle 131 is consistent with the inner diameter of the core barrel 12, the baffle 131 is in a guide cooperation with the core barrel 12, so that the oil-stopping iron rod 13 can slide up and down relative to the core barrel 12. Here, the baffle 131 not only supports the spring 17, but also serves as a sliding block to guide.

[0056] Preferably, the oil-stopping iron rod 13 is coaxially arranged with the core barrel 12.

[0057] Further, as shown in the figure, Figure 9 and Figure 10 the filter cover 18 is provided in the oil cup 11, the filter cover 18 includes a filter plate 181 sleeved on the outside of the core barrel 12, the projection of the filter plate 181 in the horizontal plane is in a closed loop structure, and a plurality of filter holes 1811 are uniformly arranged on the filter plate 181. Here, the projection of the filter plate 181 in the horizontal plane can be circular, elliptical, polygonal or irregular. The top end of the filter plate 181 is provided with a top plate 182 for closing the opening of the upper end of the filter plate 181, and the top plate 182 is provided with a fourth avoiding hole for accommodating the core barrel 12. Exemplarily, the upper end of the filter plate 181 is fixedly connected with the top plate 182 in a welding manner. The lower end of the filter cover 18 abuts against the lower side wall of the oil cup 11 under the action of its own gravity.

[0058] As a specific embodiment, the projection of the filter plate 181 in the horizontal plane is in a circular structure, and the filter cover 18 is coaxially arranged with the core barrel 12.

[0059] By setting the filter cover 18, the hard particles in the lubricating oil can be filtered, so as to avoid entering the rotary gap to be lubricated, causing more serious wear. In addition, after opening the upper cover 112 of the oil cup 11, the filter cover 18 can be easily removed, so as to facilitate cleaning of the filter cover 18.

[0060] As shown in Figure 6 and Figure 7 , the mounting bracket 14 includes a bent rod, one end of the bent rod is fixedly connected with the lower end of the core barrel 12 in a detachable manner, and the other end of the bent rod extends to above the oil cup 11 after passing around the oil cup 11 and is fixedly connected with the electromagnet 15 in a detachable manner.

[0061] As a specific embodiment, the bent rod in the embodiment includes a first horizontal section 1411 below the oil cup 11, one end of the first horizontal section 1411 is fixedly connected with the core barrel 12 in a detachable manner, and the other end of the first horizontal section 1411 is provided with a first vertical section 1412 extending upward in a vertical direction, and the connection between the first horizontal section 1411 and the first vertical section 1412 is smoothly transitioned. The upper side of the oil cup 11 is provided with a second horizontal section 1413, one end of the second horizontal section 1413 is connected with the first vertical section 1412, and the connection between the second horizontal section 1413 and the first vertical section 1412 is smoothly transitioned. The second horizontal section 1413 is provided with a second vertical section 1414 extending downward perpendicularly to the second horizontal section 1413 above the oil stop iron rod 13, and the lower end of the second vertical section 1414 is fixedly connected with the electromagnet 15 in a detachable manner.

[0062] Further, as shown in Figure 6 and Figure 8 , the other end of the second horizontal section 1413 is provided with a third vertical section 1415 extending downward perpendicularly to the second horizontal section 1413, the connection between the second horizontal section 1413 and the third vertical section 1415 is smoothly transitioned, and the lower end of the third vertical section 1415 is provided with a rubber block 142. The bent rod is fixedly connected with the core barrel 12 through a clamp 143.

[0063] During installation, the up-down position of the bent rod can be adjusted through the clamp 143, so that the rubber block 142 is pressed on the upper cover 112 of the oil cup 11. In this way, stable support can be formed for the electromagnet 15, so as to ensure that the electromagnet 15 does not vibrate greatly during work, thereby affecting the attraction of the oil stop iron rod 13, and also not damaging the weak oil cup 11.

[0064] As one specific implementation method, such as Figure 12 As shown, the clamp 143 in this embodiment includes a first clamp plate 1431 and a second clamp plate 1432 with a semi-circular structure, and the first clamp plate 1431 and the second clamp plate 1432 are hinged together by a hinge shaft 1433. A first ear plate is provided at the end of the first clamp plate 1431 away from the hinge shaft 1433, and a second ear plate is provided at the end of the second clamp plate 1432 away from the hinge shaft 1433. A bolt assembly 1434 is provided between the first ear plate and the second ear plate, and under the locking action of the bolt assembly 1434, the first clamp plate 1431 and the second clamp plate 1432 are clamped onto the core cylinder 12. The end of the first horizontal section 1411 of the bent rod facing the core cylinder 12 is fixedly connected to the first clamp plate 1431 by welding.

[0065] In one specific embodiment, the rubber block 142 described in this embodiment is provided with an insertion hole, and the lower end of the third vertical section 1415 is inserted into the insertion hole and fixedly connected to the rubber block 142 by tension force.

[0066] Furthermore, the lower end of the oil-stopping iron rod 13 has an inverted conical structure, and the upper side of the sealing plate 122 is provided with a conical recess 1221 arranged coaxially with the oil-stopping iron rod 13. The oil outlet is located at the bottom of the recess 1221 and is arranged coaxially with the oil-stopping iron rod 13. When the electromagnet 15 is de-energized, the lower end (tip) of the oil-stopping iron rod 13 is inserted into the oil outlet, thereby sealing the oil outlet.

[0067] Furthermore, the lower end of the core cylinder 12 is a connecting end, the connecting end is provided with external threads, the clamp 143 is located above the connecting end, and a back tightening nut 19 is provided on the connecting end.

[0068] In one specific embodiment, the outer surface of the core cylinder 12 is stepped, comprising a first shaft segment and a second shaft segment from bottom to top, with the diameter of the first shaft segment being larger than that of the second shaft segment. The lower end of the bent rod is fixedly connected to the first shaft segment via a clamp 143. The second clearance hole on the lower cover 113 of the oil cup 11 matches the diameter of the second shaft segment. The stepped surface between the first and second shaft segments presses against the lower surface of the lower cover 113 and is fixedly connected to the lower cover 113 by welding.

[0069] Furthermore, the upper cover 112 of the oil cup 11 is provided with an oil filling hole and a sealing plug 114 for sealing the oil filling hole.

[0070] like Figure 1 andFigure 2 As shown in the figure, a spiral feeding device includes a conveying pipe 2, a screw shaft and a motor 4. The screw shaft includes a shaft body 31 located in the conveying pipe 2 and a spiral blade 32 arranged on the shaft body 31. The shaft body 31 includes a first support end 311 and a second support end 312, and the first support end 311 and the second support end 312 are respectively rotatably connected with the conveying pipe 2 through bearing assemblies. The power output shaft of the motor 4 is connected with the shaft body 31 of the screw shaft through a transmission mechanism or through direct connection.

[0071] As a specific embodiment, the power output shaft of the motor 4 is connected with the shaft body 31 of the screw shaft through direct connection.

[0072] As shown in the figure, Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown in the figure, a first connecting pipe 51 is arranged above the first support end 311 of the conveying pipe 2, and the first connecting pipe 51 is connected with the rotation gap between the first support end 311 and the conveying pipe 2. A second connecting pipe 52 is arranged above the second support end 312 of the conveying pipe 2, and the second connecting pipe 52 is connected with the rotation gap between the second support end 312 and the conveying pipe 2.

[0073] The upper ends of the first connecting pipe 51 and the second connecting pipe 52 are provided with lubricating devices 1. The upper ends of the first connecting pipe 51 and the second connecting pipe 52 are provided with internal threads matched with the external threads of the lower end of the core barrel 12. During installation, first, the lower end of the core barrel 12 is connected with the upper end of the first connecting pipe 51 or the second connecting pipe 52 through threaded connection, and then the back nut 19 is tightened.

[0074] As a specific embodiment, the conveying pipe 2 in this embodiment includes an arc-shaped web plate 21, and the two ends of the web plate 21 are respectively provided with upwardly extending wing plates 22. The web plate 21 and the wing plates 22 jointly form a U-shaped structure with the opening facing upward.

[0075] One end of the U-shaped structure is provided with an end plate 23, and the end plate 23 is provided with a first supporting cylinder 231 in communication with the inside of the U-shaped structure, and the first supporting end 311 of the shaft body 31 is inserted into the first supporting cylinder 231 and is rotatably connected with the first supporting cylinder 231 through a bearing assembly. The first supporting cylinder 231 is provided with a first mounting insertion hole for accommodating the first connecting pipe 51, and the first mounting insertion hole is in communication with the rotation gap between the first supporting cylinder 231 and the first supporting end 311. The first connecting pipe 51 is inserted into the first mounting insertion hole and is fixedly connected with the first supporting cylinder 231 by welding.

[0076] The other end of the U-shaped structure is provided with a cross plate 24, and the two ends of the cross plate 24 are fixedly connected with the wing plates 22 of the U-shaped structure by welding. The lower side of the cross plate 24 is provided with a hanging tile 25, and the hanging tile 25 comprises a mounting plate 251 which is fixedly connected with the cross plate 24 in a detachable manner, for example, the mounting plate 251 is fixedly connected with the cross plate 24 by bolts. The lower side of the mounting plate 251 is provided with a second supporting cylinder 252, and the second supporting cylinder 252 is connected with the mounting plate 251 through two hanging plates 253. The upper end of the hanging plate 253 is fixedly connected with the mounting plate 251 by welding, and the lower end of the hanging plate 253 is fixedly connected with the second supporting cylinder 252 by welding. The second supporting end 312 of the shaft body 31 is inserted into the second supporting cylinder 252 and is rotatably connected with the second supporting cylinder 252 through a bearing assembly. The hanging tile 25 is provided with a second mounting insertion hole for accommodating the second connecting pipe 52, and the second mounting insertion hole is in communication with the rotation gap between the second supporting cylinder 252 and the second supporting end 312. The second connecting pipe 52 is inserted into the second mounting insertion hole and is fixedly connected with the hanging tile 25 by welding. The cross plate 24 is provided with an avoiding hole for avoiding the second connecting pipe 52. For example, the second connecting pipe 52 is located between the two hanging plates 253, that is, the mounting plate 251 and the second supporting cylinder 252 are provided with through holes, and the two through holes together form the second mounting insertion hole. The second connecting pipe 52 is fixedly connected with the second supporting cylinder 252 and the mounting plate 251 respectively by welding.

[0077] The skilled in the art can obtain other embodiments on the basis of the embodiments provided in the present application by means of combining, splitting, recombining, etc. of the embodiments of the present application, and all of the embodiments do not exceed the protection scope of the present application.

[0078] The above detailed description of the embodiments of the present application, the purpose, technical solutions and beneficial effects of the embodiments of the present application have been described in detail, and the above is only a specific embodiment of the present application, and is not used to limit the protection scope of the embodiments of the present application, that is, on the basis of the embodiments of the present application, any modification, equivalent replacement, improvement, etc. should be included in the protection scope of the embodiments of the present application.

Claims

1. A lubricating device for application to a screw feeding apparatus, characterized in that: The oil cup (11) is internally provided with a core cylinder (12), and both ends of the core cylinder (12) extend to the outside of the oil cup (11) through the side wall of the oil cup (11); An oil inlet hole (121) is arranged on the side wall of the core cylinder (12) in the oil cup (11); An oil sealing plate (122) is arranged below the oil inlet hole (121) in the core cylinder (12), and an oil outlet hole is arranged on the oil sealing plate (122); An oil stop iron (13) is arranged above the oil sealing plate (122) in the core cylinder (12), and an elastic member is arranged between the core cylinder (12) and the oil stop iron (13); An installation rack (14) is arranged on the oil cup (11), and an electromagnet (15) is arranged above the oil stop iron (13) on the installation rack (14); When the electromagnet (15) is powered, the oil stop iron (13) moves upward under the attraction of the electromagnet (15) against the elastic force of the elastic member, and the oil outlet hole is in an open state; When the electromagnet (15) is powered off, the oil stop iron (13) moves downward under the elastic restoring force of the elastic member, and blocks the oil outlet hole.

2. A lubricating device for a screw feeder according to claim 1, characterized in that: A cap (16) is arranged at the upper end of the core cylinder (12), a third avoiding hole allowing the oil stop iron (13) to pass through is arranged on the cap (16), a baffle (131) is arranged on the oil stop iron (13), and a spring (17) is sleeved on the oil stop iron (13) between the cap (16) and the baffle (131).

3. A lubricating device for a screw feeder according to claim 2, characterized in that: The cap (16) is fixedly connected with the core cylinder (12) in a threaded connection manner.

4. A lubricating device for a screw feeder according to claim 2, characterized in that: The baffle (131) is in a guide fit with the core cylinder (12).

5. A lubricating device for use in a screw feeder according to claim 1, characterized in that: A filter cover (18) is arranged in the oil cup (11), the filter cover (18) comprises a filter plate (181) sleeved on the outside of the core cylinder (12), the filter plate (181) is provided with a filter hole (1811), a top plate (182) is arranged at the top end of the filter plate (181), and a fourth avoiding hole for accommodating the core cylinder (12) is arranged on the top plate (182).

6. A lubricating device for use in a screw feeder according to claim 1, characterized in that: The installation rack (14) comprises a bent rod, one end of the bent rod is connected with the lower end of the core cylinder (12), the other end of the bent rod extends to the upper side of the oil cup (11) after passing around the oil cup (11), and is fixedly connected with the electromagnet (15).

7. A lubricating device for a screw feeder according to claim 6, characterized in that: The bending rod comprises a first horizontal section (1411) below the oil cup (11), one end of the first horizontal section (1411) is connected with the core barrel (12), the other end of the first horizontal section (1411) is provided with a first vertical section (1412), the upper side of the oil cup (11) is provided with a second horizontal section (1413), one end of the second horizontal section (1413) is connected with the first vertical section (1412), the second horizontal section (1413) is provided with a second vertical section (1414) above the oil stop iron rod (13), and the electromagnet (15) is connected with the lower end of the second vertical section (1414).

8. A lubricating device for a screw feeder according to claim 7, characterized in that: The other end of the second horizontal section (1413) is provided with a third vertical section (1415), the lower end of the third vertical section (1415) is provided with a rubber block (142), and the bending rod is fixedly connected with the core barrel (12) through a clamp (143).

9. A lubricating device for a screw feeder according to claim 7, characterized in that: The oil cup (11) is provided with an oil injection hole and a sealing plug (114) for sealing the oil injection hole.

10. A screw feeding device comprising a conveying pipe (2), a screw shaft and a motor (4) using the lubricating device according to any one of claims 1 to 9, characterized in that: The lubricating device (1) is further included, the shaft body (31) of the bolt shaft comprises a first supporting end (311) and a second supporting end (312), the first supporting end (311) and the second supporting end (312) are respectively connected with the conveying pipeline (2) through bearing assemblies, the conveying pipeline (2) is provided with a first connecting pipe (51) and a second connecting pipe (52) above the first supporting end (311) and the second supporting end (312) and in communication with the rotary gap, and the upper ends of the first connecting pipe (51) and the second connecting pipe (52) are respectively connected with the lower end of the core barrel (12) of the lubricating device (1).

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