Anti-sticking concrete vibrator and vibrating method

Abstract

The present application provides a rod-jamming-proof concrete vibrator and a vibrating method, which relate to the technical field of concrete vibrating equipment, including a vibrating rod, a transmission flexible shaft and a power assembly; the vibrating rod includes a shell, a rotating shaft and a connecting piece; the shell is a flexible shell, the rotating shaft includes a hollow portion connected to the inner space of the shell, the hollow portion of the rotating shaft is connected to an air pump through an air pipe, and when the rod is stuck, the air in the inner space of the shell is pumped out by the air pump to shrink the flexible shell, thereby effectively reducing the diameter of the vibrating rod and allowing the vibrating rod to be pulled out from the gap between the steel bars; and the present application uses the rotating shaft to pump air inside the shell, and does not require a hole connected to the outside world to be opened on the outer wall of the vibrating rod, so that cement slurry will not enter the inside of the vibrating rod even under conditions of severe vibration; the present application combines the air pipe and the steel strand to form a transmission flexible shaft together, and the steel strand can apply force evenly on the outside of the air pipe to avoid the transmission flexible shaft locally squeezing the air pipe and causing air supply failure.

Description

Technical Field

[0001] The invention relates to the technical field of concrete vibrating equipment, and in particular to an anti-sticking concrete vibrator and a vibrating method. Background Art

[0002] The statements herein merely provide background information related to the present application and do not necessarily constitute prior art.

[0003] After pouring concrete into the mold, it must be fully vibrated to assist the flow of concrete, remove bubbles in the concrete, make the concrete denser, and avoid the appearance of honeycombs, rough surfaces, holes, etc.; on-site concrete pouring construction often uses a vibrator to vibrate the concrete. The vibrator includes a motor, a transmission shaft, and a vibrating rod. The rotation of the motor is transmitted to the vibrating rod through the transmission shaft, so that the vibrating rod releases high-frequency vibrations; when in use, the construction personnel insert the vibrating rod into the concrete and use the vibrating rod to output vibrations to the concrete to compact the concrete.

[0004] As buildings develop towards taller and more complex aspects, the size of concrete components is also increasing, and the reinforcement in the components is becoming more and more dense, which brings great difficulties to the construction of concrete vibration. It is common for the vibrating rod to be stuck when it penetrates the gap between the steel bars or the vibrating rod is inserted too deeply into the concrete and becomes stuck by the concrete. After the vibrating rod is stuck, it is difficult to pull out, which seriously affects the quality and efficiency of concrete vibration. In addition, the initial setting speed of concrete is fast, and the construction workers do not have enough time to solve the problem of sticking. They often abandon the vibrating rod in the concrete after the sticking occurs, causing additional equipment loss.

[0005] At present, some anti-stuck vibrators have also appeared, such as Chinese utility model CN202120731975.7-A green and energy-saving construction device for standard floors based on BIM, which connects the vibrating rod with an air pump and opens a hole on the outer wall of the vibrating rod. Air is blown into the vibrating rod through the air pump to release the air from the opening to form a cavity between the vibrating rod and the concrete, so that the vibrating rod is freed from the stickiness of the concrete and it is easy to pull out the vibrating rod; however, this type of anti-stuck vibrator can only solve the problem of the vibrating rod being stuck by the concrete, but cannot overcome the problem of the vibrating rod being stuck by the steel bar; and the hole is opened on the side wall of the vibrating rod, and the cement slurry in the concrete can easily enter the vibrating rod during the vibration process, causing the rotating shaft to be unable to rotate normally, that is, there is a defect that the equipment is easily damaged; since the position of the transmission flexible shaft in the casing is not fixed, it may be squeezed with the air pipe, resulting in the air pipe being unable to supply air normally. Summary of the invention

[0006] The purpose of this application is to address the defects of the prior art and propose an anti-stuck concrete vibrator and vibration method, which can overcome the problem of the vibrating rod being stuck by the steel bars, prevent cement slurry from invading the equipment, ensure the stable operation of the equipment, and avoid the transmission flexible shaft from squeezing the air pipe.

[0007] The first object of the present application is to provide an anti-sticking concrete vibrator. One or more embodiments of the present application provide the following technical solutions:

[0008] A rod-jamming-proof concrete vibrator comprises a vibrating rod, a transmission flexible shaft and a power assembly; the vibrating rod comprises a shell, a rotating shaft and a connecting piece; the shell is a flexible shell sleeved on the outside of the rotating shaft, and the shell and the connecting piece together form a closed space for accommodating the rotating shaft; the rotating shaft is a round rod, and the central axis of the rotating shaft forms an angle with the length direction of the shell; the rotating shaft is connected to the transmission flexible shaft through the connecting piece; a flexible shaft joint is provided at one end of the transmission flexible shaft away from the rotating shaft, and the power assembly comprises a motor, and the flexible shaft joint is connected to the output shaft of the motor.

[0009] Furthermore, the head of the shell is conical, and a notch is provided on one side of the head facing the rotating shaft.

[0010] Furthermore, lubricating grease is applied on the inner wall of the shell.

[0011] Furthermore, the rotating shaft includes a hollow part and a solid part; the hollow part is provided with a channel and an air hole, the channel is opened along the central axis of the hollow part, the air hole is a through hole opened at intervals on the side wall of the hollow part, and the air hole connects the channel with the closed space inside the outer shell; the solid part is a cylinder fixed at one end of the hollow part.

[0012] Furthermore, the transmission flexible shaft includes a steel strand and an air pipe, wherein a plurality of the steel strands are provided and the plurality of steel strands are arranged around the air pipe; and the air pipe is connected to the hole of the hollow part.

[0013] Furthermore, the flexible shaft joint is a cylinder with ridges on the side wall, and the ridges are arranged at equal angles along the side wall of the cylinder.

[0014] Furthermore, the transmission flexible shaft includes a fixing plate; the fixing plate is an annular plate, one annular surface of the fixing plate is connected to the steel strand, and the other annular surface is connected to the flexible shaft joint.

[0015] Furthermore, the power assembly also includes an air pump, and the air pipe passes through the fixed plate and the flexible shaft joint to communicate with the air delivery port of the air pump, so that the air pump can extract air from the closed space inside the shell.

[0016] Furthermore, it also includes a sleeve, which is sleeved on the outside of the transmission flexible shaft, and the two ends of the sleeve are fixed to the vibrating rod and the power component in a one-to-one correspondence.

[0017] The second object of the present application is to provide a working method of the anti-sticking concrete vibrator, including the following contents:

[0018] Start the motor, which makes the shaft rotate in the housing through the transmission flexible shaft, so that the vibrating rod emits high-frequency vibration to compact the concrete near the vibrating rod;

[0019] When the rod is stuck, turn off the motor and start the air pump; the air pump absorbs the air inside the shell through the air holes opened in the hollow part of the rotating shaft, causing the vibrating rod to shrink inward, and shake the vibrator to make the vibrating rod escape from the gap between the steel bars;

[0020] After the vibrating rod comes out, adjust the air pump to supply air to the rotating shaft to restore the vibrating rod to its original state; turn off the air pump, maintain the air pressure inside the vibrating rod, restart the motor, and insert the vibrator into the concrete again.

[0021] Advantageous Effects of the Invention

[0022] 1. Considering that the existing vibrating rods are difficult to overcome the problem of being stuck by steel bars; the present application is provided with a flexible vibrating rod shell, so that the vibrating rod can be separated from the steel bar gap by deformation; further, the present application provides a rotating shaft with a hollow part in the vibrating rod, and the hollow part is provided with an air hole connected to the internal space of the shell, and the hollow part is connected to the air pump through an air pipe; when the rod is stuck, the air in the internal space of the shell is extracted by the air pump to shrink the flexible shell, which can effectively reduce the diameter of the vibrating rod, so that the vibrating rod can be drawn out from the steel bar gap, thereby solving the problem that the conventional anti-sticking vibrating rod cannot cope with the rod jam caused by the clamping of steel bars.

[0023] 2. Considering that concrete vibration has high requirements on the rigidity of the vibrating rod, the present application inflates air into the flexible vibrating rod during vibration and uses the air pressure to support the outer shell of the vibrating rod, so that the vibrating rod always has the necessary rigidity during the mixing process, ensuring that the vibration effect is not reduced due to the use of flexible materials for the vibrating rod.

[0024] 3. The present application adopts a retractable vibrating rod method, and there is no need to open a hole on the outer wall of the vibrating rod to connect to the outside world. Therefore, the interior of the vibrating rod is a closed environment. Even under conditions of severe vibration, cement slurry will not enter the interior of the vibrating rod, which solves the defect that conventional anti-stuck vibrators are easily damaged.

[0025] 4. In the present application, the transmission steel strands are arranged around the trachea, so that the trachea and the steel strands are connected as one; when the transmission flexible shaft is bent, the steel strands can apply force evenly on the outside of the trachea, providing stable circumferential support for the trachea, and the trachea will not be blocked due to local extrusion with the steel strands, thus avoiding the problem in conventional technology that the transmission flexible shaft and the trachea are separated, resulting in the trachea being unable to supply air normally due to extrusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings in the specification, which constitute a part of the present application, are used to provide further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0027] Figure 1 This is a schematic diagram of the overall structure of the anti-sticking concrete vibrator in Example 1 of the present application;

[0028] Figure 2 This is a schematic diagram of the vibrating rod structure of the anti-sticking concrete vibrator in Example 1 of the present application;

[0029] Figure 3 This is a schematic diagram of the structure of the vibrating rod of the anti-sticking concrete vibrator after air extraction in Example 1 of the present application;

[0030] Figure 4 This is a schematic cross-sectional view of a vibrating rod of an anti-sticking concrete vibrator in Example 1 of the present application;

[0031] Figure 5 This is a schematic diagram of the transmission flexible shaft structure of the anti-sticking concrete vibrator in Example 1 of the present application;

[0032] Figure 6 AA section schematic diagram of the transmission flexible shaft of the anti-sticking concrete vibrator in Example 1 of the present application;

[0033] Figure 7 BB section schematic diagram of the transmission flexible shaft of the anti-sticking concrete vibrator in Example 1 of the present application;

[0034] Among them, 1. vibrating rod; 2. transmission flexible shaft; 3. power assembly; 4. sleeve; 5. bearing; 6. oil seal; 11. housing; 12. rotating shaft; 13. connecting piece; 21. steel strand; 22. air pipe; 23. flexible shaft joint; 24. fixing plate; 31. electric motor; 32. air pump; 111. notch; 121. hollow part; 122. solid part; 231. ridge; 1211. channel; 1212. air hole. DETAILED DESCRIPTION

[0035] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0037] In order to enable those skilled in the art to more clearly understand the technical solution of the present application, the technical solution of the present application will be described in detail below in conjunction with specific embodiments.

[0038] As introduced in the background technology, the current anti-stuck vibrator cannot overcome the problem that the vibrating rod is stuck by the steel bar, and cement slurry may invade the vibrating rod and damage the equipment, and the transmission flexible shaft may squeeze the air pipe so that the air pipe cannot supply air normally. The present application proposes an anti-stuck concrete vibrator and a vibrating method.

[0039] Example 1

[0040] A typical implementation of the present application is as follows: Figure 1-Figure 7 As shown, a stick-proof concrete vibrator is provided.

[0041] refer to Figure 1-Figure 7 The present embodiment provides an anti-stuck concrete vibrator, comprising a vibrating rod 1, a transmission flexible shaft 2 and a power assembly 3; the vibrating rod comprises a shell 11, a rotating shaft 12 and a connecting piece 13; the shell is a flexible shell sleeved outside the rotating shaft, and the shell and the connecting piece together form a closed space for accommodating the rotating shaft; the rotating shaft is a round rod, and the central axis of the rotating shaft forms an angle with the length direction of the shell; the rotating shaft is connected to the transmission flexible shaft through a connecting piece; a flexible shaft joint 23 is provided at one end of the transmission flexible shaft away from the rotating shaft, and the power assembly comprises a motor 31, and the flexible shaft joint is connected to the output shaft of the motor;

[0042] It also includes a sleeve 4, which is sleeved on the outside of the transmission flexible shaft, and the two ends of the sleeve are fixed to the vibrating rod and the power component respectively;

[0043] Specifically, refer to Figure 2 , the connecting piece includes a bearing 5; the outer side of the bearing is fixed on the inner wall of the shell, and the inner side of the bearing is connected to the end of the rotating shaft close to the transmission flexible shaft, so that the rotating shaft and the shell form a rotational connection and lock the position of the rotating shaft in the shell; because the central axis of the rotating shaft is at an angle with the length direction of the shell, when the rotating shaft rotates, the end of the rotating shaft away from the bearing moves in a planetary manner in the shell, so that the vibrating rod vibrates at a high frequency, thereby compacting the concrete near the vibrating rod.

[0044] Considering that there are dense steel bars in concrete components and there are narrow gaps between the steel bars, when the vibrating rod is squeezed into the narrow gap from a certain angle, it will be squeezed by the steel bars and cause the rod to get stuck. In this embodiment, a flexible shell design is adopted to enable the shell to be separated from the steel bars by deformation. In this embodiment, the shell is made of modified polyvinyl chloride material, which has excellent strength and certain rigidity, and has good ductility, so that the shell can withstand the impact caused by vibration. Of course, the shell material can also be made of other flexible materials with higher strength and rigidity.

[0045] For further reference, Figure 3-Figure 4 The rotating shaft includes a hollow part 121 and a solid part 122; the hollow part is provided with a channel 1211 and an air hole 1212, the channel is opened along the central axis of the hollow part, the air hole is a through hole opened on the side wall of the hollow part, and the air hole connects the channel with the closed space inside the shell; the solid part is a cylinder fixed at one end of the hollow part; the air hole is provided with a plurality of air holes, and the plurality of air holes are arranged at intervals;

[0046] The transmission flexible shaft includes a steel strand 21 and an air pipe 22. The steel strand is provided with a plurality of steel strands, and the plurality of steel strands are arranged around the air pipe; the air pipe is connected to the hole of the hollow part;

[0047] The power assembly further comprises an air pump 32, the air pipe passing through the fixing plate and the flexible shaft joint is communicated with the air delivery port of the air pump, so that the air pump can extract the air in the closed space inside the housing;

[0048] Considering that forcing the vibrating rod to deform requires pulling with force, there is a risk of damaging the vibrating rod, in this embodiment, an air pipe that passes through the vibrator is provided, and a hollow portion with air holes is provided for the flexible shaft. The air pump extracts the gas in the shell through the air pipe and the hollow portion to make the flexible shell shrink toward the rotating shaft, thereby achieving the effect of reducing the outer diameter of the flexible shell, so that the vibrating rod can be separated from the steel bar gap, and the sticking problem is solved without using brute force;

[0049] In order to prevent the low-rigidity flexible vibrating rod shell from absorbing vibration energy and deteriorating the vibration effect, the present application also uses an air pump to inflate the vibrating rod, so that the air pressure in the vibrating rod is higher than the pressure of the external concrete on the vibrating rod shell, so that the vibrating rod exhibits the required rigidity; when the vibrating rod is stuck, the air in the vibrating rod is extracted, so that the vibrating rod shell loses air pressure support and exhibits flexibility, so that it can shrink under external pressure to escape from the steel bar gap; after escaping from the steel bar gap, the vibrating rod is re-inflated, so that the vibrating rod shell is supported by air pressure, the vibrating rod no longer exhibits flexibility, and the concrete can be vibrated normally, preventing the flexibility of the vibrating rod from affecting the concrete vibration efficiency;

[0050] Specifically, an air valve is provided on the air delivery port of the air pump; when the vibrating rod is evacuated, the air pump works to evacuate air to shrink the vibrating rod, and the air valve is closed after evacuating air to keep the vibrating rod in a contracted state; when the vibrating rod is inflated, the air pump works to inflate air into the vibrating rod, and when the air pressure inside the vibrating rod is sufficient to resist the concrete pressure outside the vibrating rod, the inflation is stopped, the air valve is closed, and the pressure inside the vibrating rod is maintained.

[0051] Of course, using an air pump to quickly shrink the vibrating rod can also achieve the effect of separating the side wall of the vibrating rod from the concrete, allowing the vibrating rod to get rid of the stickiness of the concrete and be easy to pull out. That is, this embodiment can also overcome the sticking of the vibrating rod caused by the vibrating rod being inserted too deeply. Furthermore, the air pump has multiple suction adjustment gears, which can control the degree and speed of shrinkage of the vibrating rod, and can get rid of the sticking of the rod more quickly and effectively.

[0052] It can be understood that since a solid part is provided at the end of the rotating shaft in this embodiment, the overall mass loss of the rotating shaft caused by the opening of the hole in the hollow part has limited influence on the vibration effect, so that the vibrating rod can still vibrate normally; of course, the solid part can be made of high-density metal to compensate for the reduced mass of the hollow part.

[0053] In order to adapt to the shrinkage deformation, the head of the shell is conical, and a notch 111 is provided on the side of the head facing the rotating shaft; the head of the shell is the end of the shell away from the transmission flexible shaft; when the air is evacuated, the conical head shrinks toward its own central axis, and the notch can increase the shrinkage stroke of the conical head, further reducing the outer diameter of the conical head after shrinkage.

[0054] On the other hand, reference Figure 5-Figure 7 , considering that the existing vibrator pumping structure separates the air pipe from the transmission flexible shaft, the air pipe is often squeezed by the transmission flexible shaft and loses the ventilation effect; in this embodiment, the transmission steel strand is arranged around the air pipe, so that the air pipe and the steel strand are connected as one; when the transmission flexible shaft is bent, the steel strand can evenly apply force on the outside of the air pipe, providing stable circumferential support for the air pipe, and the air pipe will not be blocked due to local squeezing with the steel strand, thus avoiding the problem that the transmission flexible shaft and the air pipe are separated in the conventional technology, resulting in the air pipe being unable to supply air normally due to squeezing;

[0055] In order to prevent the steel strand from rubbing against the air pipe, the outer wall of the steel strand is coated with grease.

[0056] In order to connect the air pipe to the air pump through the flexible shaft joint, the flexible shaft joint is a cylinder with ridges 231 on the side wall, and the ridges are arranged at equal angles along the side wall of the cylinder; a fixing plate 24 is also provided, and the fixing plate is an annular plate, one annular surface of the fixing plate is connected to the steel strand, and the other annular surface is connected to the flexible shaft joint;

[0057] The output shaft of the motor can engage with the convex ridge of the flexible shaft joint. The flexible shaft joint controls the steel strand through the fixed plate to output power to the vibrating rod, and the air pipe passing through the fixed plate and the flexible shaft joint is connected to the air pump to meet the normal air extraction needs of the air pump.

[0058] Furthermore, considering that it is necessary to evacuate air inside the housing, it is not appropriate to use the conventional method of injecting lubricating oil to lubricate the rotating shaft and the housing. In this embodiment, a lubricating method of applying grease on the inner wall of the housing is adopted; it is understandable that each time air is evacuated, some grease may enter the rotating shaft through the air hole, so after several evacuations, the staff should promptly check the wear of the inside of the vibrating rod and fill the grease in time;

[0059] It is understandable that since the vibrator vibrates frequently and is repeatedly pulled up and down during use, the grease can be redistributed on the wall of the vibrator so that the contact position between the shaft and the vibrator is always filled with grease, avoiding direct friction between the shaft and the casing.

[0060] In order to prevent the grease from affecting the operation of the bearing, an oil seal 6 is further provided in this embodiment.

[0061] In other embodiments, an oil pump may be used to replace the air pump, and the outer shell may be filled with lubricating oil. When the outer shell needs to be contracted, the lubricating oil in the shell can be extracted, and the outer shell can be restored by injecting lubricating oil into the outer shell.

[0062] Example 2

[0063] This embodiment provides a vibrating method of the anti-sticking concrete vibrator described in Embodiment 1, comprising the following contents:

[0064] When vibrating, the motor is started, and the motor causes the shaft to rotate in the housing through the transmission flexible shaft, so that the vibrating rod emits high-frequency vibration to compact the concrete near the vibrating rod;

[0065] When the rod is stuck, turn off the motor and start the air pump; the air pump absorbs the air inside the shell through the air holes opened in the hollow part of the rotating shaft, causing the vibrating rod to shrink inward, and shake the vibrator to make the vibrating rod escape from the gap between the steel bars;

[0066] After the vibrating rod comes out, adjust the air pump to supply air to the rotating shaft to restore the vibrating rod to its original state; turn off the air pump, maintain the air pressure inside the vibrating rod, restart the motor, and insert the vibrator into the concrete again.

[0067] It is understandable that, since the shell is tightly attached to the rotating shaft after shrinkage, the vibrator cannot work normally at this time, that is, it is necessary to turn off the motor before starting the air pump.

[0068] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An anti-sticking concrete vibrator, Its characteristics are: It comprises a vibrating rod, a transmission flexible shaft and a power assembly; the vibrating rod comprises a shell, a rotating shaft and a connecting piece; the shell is a flexible shell sleeved on the outside of the rotating shaft, and the shell and the connecting piece together form a closed space for accommodating the rotating shaft; the rotating shaft is a round rod, and the central axis of the rotating shaft forms an angle with the length direction of the shell; the rotating shaft is connected to the transmission flexible shaft through the connecting piece; a flexible shaft joint is provided at one end of the transmission flexible shaft away from the rotating shaft, and the power assembly comprises a motor, and the flexible shaft joint is connected to the output shaft of the motor; The head of the shell is conical, and a notch is provided on the side of the head facing the rotating shaft; The rotating shaft comprises a hollow part and a solid part; the hollow part is provided with a channel and an air hole, the channel is opened along the central axis of the hollow part, the air hole is a through hole opened at intervals on the side wall of the hollow part, and the air hole connects the channel with the closed space inside the shell; the solid part is a cylinder fixed at one end of the hollow part; The transmission flexible shaft comprises a steel strand and an air pipe, wherein a plurality of steel strands are provided and the plurality of steel strands are arranged around the air pipe; the air pipe is communicated with the hole of the hollow part; The power assembly also includes an air pump, and the air pipe passes through the fixing plate and the flexible shaft joint and is connected to the air delivery port of the air pump, so that the air pump can extract the air in the closed space inside the shell; An air pump is used to inflate the vibrator so that the air pressure inside the vibrator is higher than the pressure of the external concrete on the outer shell of the vibrator, so that the vibrator exhibits the required rigidity; when the vibrator is stuck, the gas inside the vibrator is extracted, so that the outer shell of the vibrator loses the air pressure support and exhibits flexibility, so that it can shrink under external pressure to escape from the gap between the steel bars.

2. The anti-sticking concrete vibrator according to claim 1, Its characteristics are: The inner wall of the shell is coated with lubricating grease.

3. The anti-sticking concrete vibrator according to claim 1, Its characteristics are: The flexible shaft joint is a cylinder with convex ridges on the side wall, and the convex ridges are arranged at equal angles along the side wall of the cylinder.

4. The anti-sticking concrete vibrator according to claim 3, Its characteristics are: The transmission flexible shaft comprises a fixing plate; the fixing plate is an annular plate, one annular surface of the fixing plate is connected to the steel strand, and the other annular surface is connected to the flexible shaft joint.

5. The anti-sticking concrete vibrator according to claim 1, Its characteristics are: It also includes a sleeve, which is sleeved on the outside of the transmission flexible shaft, and the two ends of the sleeve are fixed to the vibrating rod and the power component in a one-to-one correspondence.

6. A method for vibrating concrete, using the anti-sticking concrete vibrator as claimed in any one of claims 1 to 5, Its characteristics are: Includes the following: Start the motor, which makes the shaft rotate in the housing through the transmission flexible shaft, causing the vibrator to vibrate at a high frequency; When the rod is stuck, turn off the motor and start the air pump; the air pump absorbs the air inside the shell through the air holes opened in the hollow part of the rotating shaft, causing the vibrating rod to shrink inward, and shake the vibrator to make the vibrating rod escape from the gap between the steel bars; After the vibrating rod comes out, adjust the air pump to supply air to the rotating shaft to restore the vibrating rod to its original state; turn off the air pump, maintain the air pressure inside the vibrating rod, restart the motor, and insert the vibrator into the concrete again.

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