Tubular vibrating feeder for conveying salt materials

By setting up a blow pipe and a blow hole in the salt material conveying pipe type vibrating feeder, and controlling the airflow with a check valve, the problem of easy tangling of salt material is solved, and the anti-tangling effect of salt material is achieved.

CN223254001UActive Publication Date: 2025-08-22CHINASALT CHANGJIANG SALINIZATION
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Patent Information

Application Number
CN202422281385.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-18
Publication Date
2025-08-22
Estimated Expiration
2034-09-18

AI Technical Summary

Technical Problem

The existing tube vibration feeders lack the anti-plate bonding intervention structure during the salt material transportation process, resulting in the salt material being easily clamped during the vibration process.

Method used

A pipe-type vibrating feeder is designed. By setting a blow pipe and a blow hole in the feed pipe, and controlling the airflow direction with a check valve, the airflow is used to prevent the salt plate from being tied.

Benefits of technology

It effectively prevents plate bonding caused by vibration during the transportation process of salt materials, ensuring the continuity and efficiency of feeding.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a tubular vibrating feeder for conveying salt materials. The tubular vibrating feeder comprises a vibrating single body and a first connecting pipe, the bottom of each material vibrating single body is a supporting base of a plate-shaped structure, a sleeve is fixed to the center of the supporting base, a piston is arranged in the sleeve, an upper spring base of a ring structure is arranged on the top of the piston, a lower spring base of a ring structure is fixedly embedded on the sleeve, the upper spring base and the lower spring base are connected through a spring, and the upper spring base is fixed to a pipe frame. Vibration motors are fixed to the two sides of the pipe frame, a horizontal feeding pipe is fixedly embedded into the top of the pipe frame, an air blowing pipe parallel to the axis of the feeding pipe is fixed to the inner wall of the feeding pipe, air blowing holes communicated with the interior of the feeding pipe are distributed in the air blowing pipe in an array mode, and the hole direction of the air blowing holes is aligned to the pipe bottom of the feeding pipe. Wherein the upper portion of the feeding pipe at one end is connected with a feeding hopper in a communicating mode, and the lower portion of the feeding pipe at the other end is connected with a discharging hopper in a communicating mode. The device has the beneficial effect that the salt material can be prevented from being hardened due to a ramming and vibrating principle during conveying.
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Description

Technical Field

[0001] The utility model belongs to the technical field of tubular vibrating feeders, in particular to a tubular vibrating feeder used for salt material transportation. Background Art

[0002] In salt production, tubular vibrating feeders are often used to feed and transport salt due to its particle size characteristics. Tubular vibrating feeders use a vibrating motor to force the supporting tube to perform simple harmonic vibration or approximate simple harmonic vibration in a certain direction. When the acceleration of the vibration reaches a certain value, the material is continuously thrown or slid in the conveying tube along the direction of movement, thereby moving the material forward and achieving the purpose of material transportation.

[0003] However, based on the tamping vibration principle, the vibration force generated by the vibration motor will stimulate the vibration of the salt particles; this vibration weakens the binding force between the salt particles (such as friction, adhesion, etc.), and at the same time, under the combined action of the vertical vibration force, other positive pressures and the gravity of the salt particles, the air between the salt particles is discharged, and the gaps between the salt particles are eliminated, so that the salt particles are squeezed against each other and arranged more evenly and densely. When the moisture between the salt is not completely dry, it is very easy to cause the salt to become compacted under the tamping vibration principle. However, the existing tubular vibrating feeder usually does not have an anti-compaction intervention structure for salt transportation (such as the short-circuit tubular vibrating feeder with publication number CN219238300U). Therefore, when the vibrating feeder is used for salt transportation, it is necessary to intervene in the tamping vibration effect. Utility Model Content

[0004] The purpose of the utility model is to provide a tubular vibrating feeder for salt material transportation, so as to solve the technical problem that the above-mentioned background technology is not equipped with an anti-hardening intervention structure for salt material transportation.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] A tubular vibrating feeder for conveying salt materials, comprising: a vibrating material unit and a first connecting pipe; the bottom of the vibrating material unit is a support seat with a plate-shaped structure, a sleeve with a closed lower portion is fixed in the center of the support seat, a piston is matched with a piston in the sleeve, an upper spring seat with a ring structure is provided on the top of the piston, a lower spring seat with a ring structure is fixed on the sleeve, a spring is used to connect the upper and lower spring seats, the upper spring seat is fixed on a pipe rack, a vibrating motor is fixed on both sides of the pipe rack, a horizontal feeding pipe is fixed in the top of the pipe rack, and a spring parallel to the axis of the feeding pipe is fixed on the inner wall of the feeding pipe The blowing pipe has an array of blowing holes distributed on the blowing pipe that are connected to the inside of the feeding pipe. The blowing holes are aligned with the bottom of the feeding pipe. The blowing pipe is connected to the bottom of the space in the sleeve by a second connecting pipe. The structure of the first connecting pipe is consistent with that of the feeding pipe, and the blowing pipe and the blowing holes are provided at the same position. The feeding pipes on the vibration material monomer are connected in series end to end or in series using the first connecting pipe, and the feeding pipes in series or the blowing pipes inside the first connecting pipe are followed in series. After the series connection, the feeding pipe at one end is connected to the feed hopper above, and the feeding pipe at the other end is connected to the discharge hopper below.

[0007] Furthermore: in order to reduce the splashing of raw materials during the vibration feeding of the salt material, the outer end of the feeding pipe connected to the feed hopper is closed with a head end cover, and the outer end of the feeding pipe connected to the discharge hopper is closed with a terminal cover.

[0008] Furthermore: in order to make the air hole only blow air but not inhale when working, and prevent salt particles from accidentally entering the second connecting pipe, the space below the sleeve is connected with two groups of channels, namely the air inlet and the exhaust port, wherein the air inlet is connected to the first one-way valve, and the exhaust port is connected to the second connecting pipe through the second one-way valve. The first one-way valve only allows gas to enter the sleeve from the first one-way valve, and the second one-way valve only allows gas to be discharged from the sleeve.

[0009] Furthermore: in order to improve the connection firmness between the pipe rack and the feeding pipe and facilitate the replacement and maintenance of the feeding pipe, a pipe clamp concentric with the feeding pipe is fixed on the pipe rack, and the pipe clamp locks the feeding pipe on the pipe rack.

[0010] Furthermore: in order to prevent the vibrating feeding pipe from affecting the gas delivery of the second connecting pipe, the second connecting pipe is made of a steel wire hose.

[0011] Furthermore: in order to improve the supporting capacity of the lower spring seat, the lower spring seat, the support seat and the outer wall of the sleeve are connected and fixed by a circumferential array of reinforcing ribs.

[0012] Furthermore: in order to ensure that the feeding pipe has the ability to maintain its reset after vibration and to avoid the feeding pipe vibrating only in the up and down directions, a round bottom connecting block is used to connect the piston and the upper spring seat. The bottom of the round bottom connecting block is a round convex structure, and the top of the round bottom connecting block is fixed to the center of the upper spring seat and the pipe rack with a connecting bolt. The top of the piston is set as an arc-shaped concave top, and the round convex bottom of the round bottom connecting block is non-fixedly embedded in the arc-shaped concave top.

[0013] Furthermore: in order to prevent interference between the vertical movement of the piston and the vibration movement of the round bottom connecting block; the piston and the round bottom connecting block are both made of iron metal, the support seat and the sleeve are made of non-magnetic metal, and a magnetic core made of strong magnetic material is embedded in the piston. Even if the arc-shaped concave top and the round bottom connecting block produce relative vibration displacement, the magnetic force of the magnetic core will enable the arc-shaped concave top of the piston to always be adsorbed under the round convex bottom of the round bottom connecting block.

[0014] Furthermore: in order to prevent the connecting bolt from loosening due to vibration, an anti-rotation gasket is provided between the connecting bolt and the pipe rack. The anti-rotation gasket is made of high-friction rubber. When the connecting bolt is tightened, the anti-rotation gasket is elastically squeezed to provide friction to prevent the connecting bolt from rotating.

[0015] In summary, the present invention has the following beneficial effects:

[0016] ① It can prevent the salt material from becoming compacted during transportation due to the tamping vibration principle: through the establishment of the air blowing pipe and the air blowing hole; when the vibration motor is working, it will drive the pipe rack to vibrate, and the lower spring seat and the round bottom connecting block connected to the bottom of the pipe rack will also vibrate, thereby driving the non-completely fixed magnetic piston under the round bottom connecting block to follow the movement. Because the piston and the sleeve piston are connected, the piston will reciprocate up and down in the sleeve under the action of vibration. When the piston moves upward relative to the sleeve, negative pressure is generated in the sleeve. Under the action of negative pressure, the second one-way valve is closed, the first one-way valve is opened, and the gas The gas enters the sleeve from the air inlet. When the piston moves downward relative to the sleeve, the gas in the sleeve is compressed by the piston, so that positive pressure is generated in the sleeve. Under the action of positive pressure, the first one-way valve is closed and the second one-way valve is opened. The gas in the sleeve is pushed into the second connecting pipe from the exhaust port through the second one-way valve. The second connecting pipe conveys the airflow to the blowing pipe, and the blowing pipe disperses the airflow to the blowing holes. Because the blowing holes are aligned with the bottom of the feeding pipe, the blowing holes will blow away the salt material compacted at the bottom of the feeding pipe to prevent the salt material from being compacted at the bottom of the feeding pipe and affecting the feeding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the first embodiment of the utility model;

[0018] Figure 2 It is a structural diagram of the second embodiment of the utility model;

[0019] Figure 3 This is a schematic diagram of the overall structure of the vibration material monomer in the utility model;

[0020] Figure 4 This is a schematic diagram of the bottom side structure of the vibration material monomer in the utility model;

[0021] Figure 5 yes Figure 4 A magnified view of the structure at center A;

[0022] Figure 6 This is a schematic diagram of the front structure of the vibration material monomer in the utility model;

[0023] Figure 7 yes Figure 6 Schematic diagram of the BB cross-section structure;

[0024] Figure 8 yes Figure 7 A magnified view of the structure at center C;

[0025] In the figure, 1. vibration material unit; 2. feed hopper; 3. discharge hopper; 4. head end cover; 5. end cover; 6. first connecting pipe; 11. support seat; 12. sleeve; 13. piston; 14. spring; 15. pipe rack; 16. pipe clamp; 17. feeding pipe; 18. vibration motor; 19. air inlet; 110. exhaust port; 111. first one-way valve; 112. second one-way valve; 113. second connecting pipe; 114. blowing pipe; 115. blowing hole; 116. upper spring seat; 117. reinforcing rib; 118. lower spring seat; 119. round bottom connecting block; 120. connecting bolt; 121. anti-rotation gasket; 1301. arc-shaped concave top; 1302. magnetic core. DETAILED DESCRIPTION

[0026] The present invention will be described in further detail below with reference to the accompanying drawings.

[0027] Example:

[0028] See also Figures 1-8 , this utility model provides a technical solution:

[0029] A tubular vibrating feeder for conveying salt materials, comprising: a vibrating material unit 1, a first connecting pipe 6; the bottom of the vibrating material unit 1 is a support seat 11 of a plate-like structure, a sleeve 12 with a closed lower portion fixed to the center of the support seat 11, a piston 13 in the sleeve 12, an upper spring seat 116 of a ring structure is provided on the top of the piston 13, a lower spring seat 118 of a ring structure is fixed on the sleeve 12, the upper spring seat 116 and the lower spring seat 118 are connected by a spring 14, the upper spring seat 116 is fixed to a pipe rack 15, a vibrating motor 18 is fixed on both sides of the pipe rack 15, a horizontal feeding pipe 17 is fixed on the top of the pipe rack 15, and a spring parallel to the axis of the feeding pipe 17 is fixed to the inner wall of the feeding pipe 17 The blowing pipe 114 has an array of blowing holes 115 distributed on the blowing pipe 114 and connected to the inside of the feeding pipe 17. The hole direction of the blowing hole 115 is aligned with the bottom of the feeding pipe 17. The blowing pipe 114 is connected to the bottom of the space inside the sleeve 12 by the second connecting pipe 113. The structure of the first connecting pipe 6 is consistent with that of the feeding pipe 17, and the blowing pipe 114 and the blowing holes 115 are provided at the same position; the feeding pipes 17 on the vibration material monomer 1 are connected in series end to end or in series using the first connecting pipe 6, and the series-connected feeding pipes 17 or the blowing pipes 114 inside the first connecting pipe 6 are followed by series connection. After the series connection, the feeding pipe 17 at one end is connected to the feed hopper 2 above, and the feeding pipe 17 at the other end is connected to the discharge hopper 3 below.

[0030] In order to reduce the splashing of raw materials during the vibration feeding of salt, the outer end of the feeding pipe 17 connected to the feed hopper 2 is closed with a head end cover 4, and the outer end of the feeding pipe 17 connected to the discharge hopper 3 is closed with a terminal cover 5.

[0031] In order to make the air hole 115 work so that only air is blown but not inhaled, and to prevent salt particles from accidentally entering the second connecting pipe 113, the space below the sleeve 12 is connected with two groups of channels, namely the air inlet 19 and the exhaust port 110, wherein the air inlet 19 is connected to the first one-way valve 111, and the exhaust port 110 is connected to the second connecting pipe 113 through the second one-way valve 112. The first one-way valve 111 only allows gas to enter the sleeve 12 from the first one-way valve 111, and the second one-way valve 112 only allows gas to be discharged from the sleeve 12.

[0032] In order to improve the connection firmness between the pipe rack 15 and the feeding pipe 17 and facilitate the replacement and maintenance of the feeding pipe 17 , a pipe clamp 16 concentric with the feeding pipe 17 is fixed to the pipe rack 15 , and the pipe clamp 16 locks the feeding pipe 17 on the pipe rack 15 .

[0033] In order to prevent the vibrating feeding pipe 17 from affecting the gas delivery of the second connecting pipe 113 , the second connecting pipe 113 is made of a steel hose.

[0034] In order to improve the supporting capacity of the lower spring seat 118 , the lower spring seat 118 and the outer wall of the support seat 11 and the sleeve 12 are connected and fixed by a circumferential array of reinforcing ribs 117 .

[0035] In order to ensure that the feeding pipe 17 has the ability to maintain its reset after vibration and to prevent the feeding pipe 17 from vibrating only in the up and down directions, a round bottom connecting block 119 is used to connect the piston 13 and the upper spring seat 116. The bottom of the round bottom connecting block 119 is a round convex structure. The top of the round bottom connecting block 119 is fixed to the center of the upper spring seat 116 and the pipe rack 15 by a connecting bolt 120. The top of the piston 13 is set to an arc-shaped concave top 1301, and the round convex bottom of the round bottom connecting block 119 is non-fixedly embedded in the arc-shaped concave top 1301.

[0036] In order to prevent interference between the vertical movement of the piston 13 and the vibration movement of the round bottom connecting block 119; the piston 13 and the round bottom connecting block 119 are both made of iron metal, the support seat 11 and the sleeve 12 are made of non-magnetic metal, and a magnetic core 1302 made of strong magnetic material is embedded in the piston 13. Even if the arc-shaped concave top 1301 and the round bottom connecting block 119 produce relative vibration displacement, the magnetic force of the magnetic core 1302 will ensure that the arc-shaped concave top 1301 of the piston 13 can always be adsorbed under the round convex bottom of the round bottom connecting block 119.

[0037] In order to prevent the connecting bolt 120 from loosening due to vibration, an anti-rotation gasket 121 is provided between the connecting bolt 120 and the pipe rack 15. The anti-rotation gasket 121 is made of high-friction rubber. When the connecting bolt 120 is tightened, the anti-rotation gasket 121 is elastically squeezed, providing friction to prevent the connecting bolt 120 from rotating.

[0038] Brief description of the usage process:

[0039] Example 1 (as Figure 1 As shown, this feeder is composed of multiple groups of vibrating material monomers 1, without the first connecting pipe 6 involved):

[0040] The salt material is put into the feed hopper 2, and the salt material enters the feeding pipe 17 fixed in series through the feed hopper 2. Then all the vibration motors 18 are energized to make them vibrate. The vibration motor 18 drives the feeding pipe 17 to vibrate through the pipe rack 15. When the feeding pipe 17 vibrates, the pipe body performs simple harmonic vibration or approximate simple harmonic vibration in a certain direction. When the acceleration of the vibration of the feeding pipe 17 reaches a certain value, the salt material is continuously thrown or slid along the direction of movement in the pipe body of the feeding pipe 17, thereby moving the salt material forward (similar to the working principle of a traditional tool dustpan) and reaching the discharge hopper 3. After reaching the discharge hopper 3, the salt material is discharged from the discharge hopper 3, completing the feeding operation.

[0041] However, based on the tamping vibration principle, the vibration force generated by the vibration motor 18 will stimulate the vibration of the salt particles; this vibration weakens the binding force (such as friction, adhesion, etc.) between the salt particles, and at the same time, under the combined action of the vertical vibration force, other positive pressures and the gravity of the salt particles, the air between the salt particles is discharged, and the gaps between the salt particles are eliminated, so that the salt particles are squeezed against each other and arranged more evenly and densely. When the moisture between the salt is not completely dry, it is very easy to cause the salt to become compacted under the tamping vibration principle. Therefore, when the vibrating feeder is used for salt transportation, the tamping vibration effect needs to be intervened.

[0042] When the vibration motor 18 is working, it will drive the pipe rack 15 to vibrate, and the lower spring seat 118 and the round bottom connecting block 119 connected below the pipe rack 15 will also vibrate, thereby driving the non-completely fixed magnetic piston 13 below the round bottom connecting block 119 to follow the movement. Because the piston 13 and the sleeve 12 are piston-connected, the piston 13 will reciprocate up and down in the sleeve 12 under the action of vibration. When the piston 13 moves upward relative to the sleeve 12, negative pressure is generated in the sleeve 12. Under the action of negative pressure, the second one-way valve 112 is closed, and the first one-way valve 111 is opened. Gas enters the sleeve 12 from the air inlet 19. When the piston 13 moves downward relative to the sleeve 12, the gas in the sleeve 12 is compressed by the piston, so that positive pressure is generated in the sleeve 12. Under the action of positive pressure, the first one-way valve 111 is closed, and the second one-way valve 112 is opened. The gas in 12 is pushed into the second connecting pipe 113 from the exhaust port 110 through the second one-way valve 112. The second connecting pipe 113 conveys the airflow to the blowing pipe 114, and the blowing pipe 114 disperses the airflow to the blowing holes 115. Because the hole direction of the blowing holes 115 is aligned with the bottom of the feeding pipe 17, the blowing holes 115 will blow away the salt material compacted at the bottom of the feeding pipe 17, and prevent the salt material from hardening at the bottom of the feeding pipe 17, affecting the feeding effect. At the same time, the first one-way valve 111 and the second one-way valve 112 can adopt adjustable one-way valves. When the salt material is not hardened, the second one-way valve 112 can be completely closed and the first one-way valve 111 can be fully opened to prevent the second connecting pipe 113 from participating in the work. When the salt material has a tendency to harden, the second one-way valve 112 is reactivated and the first one-way valve 111 is opened to work normally to loosen the hardened salt material.

[0043] Example 2 (such as Figure 2 As shown, the feeder adopts a series combination of multiple groups of vibrating material units 1 and first connecting pipes 6):

[0044] The basic working principle of the second embodiment is basically the same as that of the first embodiment, so it will not be repeated. The only difference is that the air blowing pipe 114 in the first connecting pipe 6 is connected to the air blowing pipe 114 in the adjacent feeding pipe 17, so that the air blowing pipe 114 in the first connecting pipe 6 also has a blowing ability and can also loosen the compacted salt material in the first connecting pipe 6.

[0045] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A tubular vibrating feeder for conveying salt, comprising: A vibration material monomer (1) and a first connecting pipe (6); characterized in that: the bottom of the vibration material monomer (1) is a support seat (11) of a plate structure, a sleeve (12) with a closed lower portion is fixed in the center of the support seat (11), a piston (13) is matched with a piston in the sleeve (12), an upper spring seat (116) of a ring structure is provided on the top of the piston (13), a lower spring seat (118) of a ring structure is fixed on the sleeve (12), the upper spring seat (116) and the lower spring seat (118) are connected by a spring (14), the upper spring seat (116) is fixed on a pipe rack (15), a vibration motor (18) is fixed on both sides of the pipe rack (15), a horizontal feeding pipe (17) is fixed on the top of the pipe rack (15), and an air blowing pipe (114) parallel to the axis of the feeding pipe (17) is fixed on the inner wall of the feeding pipe (17) ), the blowing holes (115) which are in communication with the inside of the feeding pipe (17) are arranged in an array on the blowing pipe (114), the holes of the blowing holes (115) are aligned with the bottom of the feeding pipe (17), the blowing pipe (114) is in communication with the bottom of the space inside the sleeve (12) by using the second connecting pipe (113), the structure of the first connecting pipe (6) is consistent with that of the feeding pipe (17), and the blowing pipe (114) and the blowing holes (115) are provided at the same position; the feeding pipes (17) on the vibration material monomer (1) are connected in series end to end or connected in series by using the first connecting pipe (6), and the feeding pipes (17) in series or the blowing pipes (114) inside the first connecting pipe (6) are connected in series following the series connection, and after the series connection, the feeding pipe (17) at one end is in communication with the feed hopper (2) above, and the feeding pipe (17) at the other end is in communication with the discharge hopper (3) below.

2. The tubular vibrating feeder for salt material transportation according to claim 1, characterized in that: The outer end of the feeding pipe (17) connected to the feed hopper (2) is closed by a head end cover (4), and the outer end of the feeding pipe (17) connected to the discharge hopper (3) is closed by a tail end cover (5).

3. The tubular vibrating feeder for salt material transportation according to claim 1, characterized in that: The space below the sleeve (12) is connected to two groups of channels, namely an air inlet (19) and an air outlet (110), wherein the air inlet (19) is connected to a first one-way valve (111), and the air outlet (110) is connected to a second connecting pipe (113) via a second one-way valve (112). The first one-way valve (111) only allows gas to enter the sleeve (12) from the first one-way valve (111), and the second one-way valve (112) only allows gas to be discharged from the sleeve (12).

4. The tubular vibrating feeder for salt material transportation according to claim 1, characterized in that: A pipe hoop (16) concentric with the feeding pipe (17) is fixed on the pipe rack (15), and the pipe hoop (16) locks the feeding pipe (17) on the pipe rack (15).

5. The tubular vibrating feeder for salt material transportation according to claim 1, characterized in that: The second connecting pipe (113) is made of a steel hose.

6. The tubular vibrating feeder for salt material transportation according to claim 1, characterized in that: The lower spring seat (118), the support seat (11) and the outer wall of the sleeve (12) are connected and fixed by a circumferential array of reinforcing ribs (117).

7. The tubular vibrating feeder for salt material transportation according to claim 1, characterized in that: The piston (13) and the upper spring seat (116) are connected by a round bottom connecting block (119). The bottom of the round bottom connecting block (119) is a round convex structure. The top of the round bottom connecting block (119) is fixed to the center of the upper spring seat (116) and the pipe rack (15) by a connecting bolt (120). The top of the piston (13) is set as an arc-shaped concave top (1301). The round convex bottom of the round bottom connecting block (119) is non-fixedly embedded in the arc-shaped concave top (1301).

8. The tubular vibrating feeder for salt material transportation according to claim 7, characterized in that: The piston (13) and the round bottom connecting block (119) are both made of iron metal, the support seat (11) and the sleeve (12) are made of non-magnetic metal, and a magnetic core (1302) made of a strong magnetic material is embedded in the piston (13). Even if the arc-shaped concave top (1301) and the round bottom connecting block (119) produce relative vibration displacement, the magnetic force of the magnetic core (1302) can make the arc-shaped concave top (1301) of the piston (13) always be adsorbed under the round convex bottom of the round bottom connecting block (119).

9. The tubular vibrating feeder for salt material transportation according to claim 7, characterized in that: An anti-rotation gasket (121) is provided between the connecting bolt (120) and the pipe rack (15). The anti-rotation gasket (121) is made of high-friction rubber. When the connecting bolt (120) is tightened, the anti-rotation gasket (121) is elastically squeezed to provide friction to prevent the connecting bolt (120) from rotating.

Citation Information

Patent Citations

  • Short-circuit pipe type vibrating feeder

    CN219238300U