Oil mist lubrication system

Abstract

The invention discloses an oil mist lubricating system which can continuously and quantitatively output oil mist. The oil mist comprises an oil pump, an oil-gas distributor and an oil mist generator, the oil-gas distributor is provided with an oil inlet, a gas inlet and at least one output connector, an outlet of the oil pump is communicated with the oil inlet of the oil-gas distributor so as to inject oil into the oil-gas distributor, and compressed air with certain pressure is connected into the gas inlet of the oil-gas distributor; the oil-gas distributor pumps out input oil according to a certain amount and mixes the input oil with input compressed air to form oil-gas flow, the formed oil-gas flow is continuously output through the output connector, the oil mist generator comprises an oil mist nozzle, and the oil mist nozzle is connected with the output connector. Oil gas flow output from the output connector flows into the oil mist nozzle and forms oil mist through the oil mist nozzle to be sprayed out.

Description

Technical Field

[0001] The invention relates to the field of oil mist lubrication, in particular to an oil mist lubrication system. Background Art

[0002] Oil mist lubrication is a typical gas-liquid two-phase fluid lubrication technology. It uses compressed air at a certain pressure to atomize liquid lubricating oil into small particles, which are suspended in the compressed air to form oil mist. Under its own pressure energy, it is transported through the transmission pipeline to the tools, bearings, transmission pairs, etc. The atomized lubricating oil provides heat dissipation and lubrication. However, the existing oil mist lubrication system can only achieve continuous output of oil mist, and cannot achieve continuous and quantitative output of oil mist, which limits its use scenarios.

[0003] Therefore, there is an urgent need for an oil mist lubrication system that can continuously and quantitatively output oil mist to overcome the above-mentioned defects. Summary of the invention

[0004] The object of the present invention is to provide an oil mist lubrication system which can output oil mist continuously and quantitatively.

[0005] To achieve the above-mentioned purpose, the oil mist lubrication system provided by the present invention includes an oil pump, an oil-gas distributor and an oil mist generator. The oil-gas distributor is provided with an oil inlet, a gas inlet and at least one output connector. The outlet of the oil pump is connected to the oil inlet of the oil-gas distributor to inject oil into the oil-gas distributor. The gas inlet of the oil-gas distributor is connected to compressed air of a certain pressure. The oil-gas distributor pumps out the input oil according to a certain amount and mixes it with the input compressed air to form an oil-gas flow and continuously outputs the formed oil-gas flow through the output connector. The oil mist generator includes an oil mist nozzle, which is connected to the output connector. The oil-gas flow output from the output connector flows into the oil mist nozzle and forms oil mist through the oil mist nozzle and is sprayed out.

[0006] Preferably, the gas inlet of the oil and gas distributor is connected to the first input gas circuit, and the first input gas circuit is equipped with a first solenoid valve for controlling the on-off of the first input gas circuit.

[0007] Preferably, the outlet of the oil pump is connected to the oil inlet of the oil-gas distributor via an input oil circuit, and a filter is installed in the input oil circuit.

[0008] Preferably, the oil pump is provided with an air inlet, the air inlet of the oil pump is connected to a second input air circuit, and a second solenoid valve for controlling the operating frequency of the oil pump is installed in the second input air circuit.

[0009] Preferably, the oil mist lubrication system of the present invention is also provided with a first total input air circuit, the end of the first total input air circuit is dispersed to form a first input air circuit and a second input air circuit, the first total input air circuit is installed with a first air source processing device, and the first air source processing device is used to filter and / or reduce the pressure of the input compressed air.

[0010] Preferably, the oil mist nozzle is connected to the output connector via an oil and gas flow input pipeline, and the oil mist nozzle is also connected to a second total input gas circuit, which is used to input compressed air to the oil mist nozzle. The compressed air input to the oil mist nozzle mixes with the oil and gas flow to form oil mist and is sprayed out.

[0011] Preferably, the oil mist generator further comprises an oil mist storage container, the oil mist nozzle is arranged in the oil mist storage container, and the oil mist storage container is connected to an oil mist output pipeline.

[0012] Preferably, a structural chamber is provided in the oil mist nozzle, the lower end of the structural chamber opens at the bottom of the oil mist nozzle and forms an oil mist outlet, the oil mist nozzle is provided with a guide body in the structural chamber, the guide body extends downward from the top of the structural chamber, and the lower end of the guide body is a certain distance away from the oil mist outlet, a first channel is provided in the guide body, and a second channel is formed between the guide body and the wall surface of the structural chamber, the first channel and the second channel are respectively used for inputting oil and gas flow, or the first channel is used for inputting oil and gas flow and the second channel is used for inputting a mixed fluid of oil and gas flow and compressed air.

[0013] Preferably, the width of the second channel decreases continuously from top to bottom.

[0014] Preferably, the oil mist nozzle includes a first cylinder and a second cylinder which are detachably assembled, the bottom of the first cylinder protrudes downward to form a guide body, the first cylinder is provided with a guide chamber connected to the first channel, the structural chamber is provided in the second cylinder, the guide body penetrates into the structural chamber, the radius of the upper end of the guide body is greater than or equal to the radius of the upper end of the structural chamber, the outer wall of the first cylinder cuts out a guide plane extending from the top of the first cylinder to the bottom of the first cylinder, the guide plane is vertically arranged, a guide groove is provided at the top of the first cylinder, one end of the guide groove is connected to the guide chamber, and the other end of the guide groove opens to the guide plane, the second cylinder includes a first part and a second part, the second part is provided below the first part, the radius of the first cylinder is equal to that of the first part, the radius of the first part is smaller than the radius of the second part, the first part is provided with a plurality of guide channels, one end of the guide channel is connected to the upper end of the second channel, and the other end of the guide channel opens to the outer wall of the first part.

[0015] Compared with the prior art, the present invention provides oil to the oil and gas distributor by setting an oil pump connected to the oil inlet of the oil and gas distributor, and the gas inlet of the oil and gas distributor is also connected to compressed air of a certain pressure, so that the oil and gas distributor pumps out the input oil in a certain amount and mixes it with the input compressed air to form an oil and gas flow. The oil and gas distributor can accurately and quantitatively pump oil, and the accurately and quantitatively measured oil and the input compressed air are mixed in the oil and gas distributor to form an oil and gas flow, and the oil and gas flow is continuously and quantitatively output. After the continuous and quantitative oil and gas flow is injected into the oil mist nozzle, the oil mist nozzle can continuously and quantitatively generate and spray oil mist. In summary, the oil mist lubrication system of the present invention can continuously and quantitatively output oil mist. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the oil mist lubrication system of the present invention.

[0017] Figure 2 It is a front view of the oil mist lubrication system of the present invention.

[0018] Figure 3 It is a perspective view of the oil mist nozzle of the present invention.

[0019] Figure 4 It is a front view of the oil mist nozzle of the present invention.

[0020] Figure 5 The oil mist nozzle of the present invention is Figure 4 Sectional view after cutting along the AA line segment.

[0021] Figure 6 It is a top view of the oil mist nozzle of the present invention.

[0022] Figure 7 The oil mist nozzle of the present invention is Figure 6 Sectional view after cutting along line segment BB.

[0023] Figure 8 It is a three-dimensional exploded view of the oil mist nozzle of the present invention. DETAILED DESCRIPTION

[0024] In order to explain the technical content and structural features of the present invention in detail, further description will be given below in combination with the implementation modes and the accompanying drawings.

[0025] like Figure 1 and Figure 2As shown, the oil mist lubrication system 100 provided by the present invention includes an oil pump 10, an oil-gas distributor 20 and an oil mist generator 30. The oil-gas distributor 20 is provided with an oil inlet 21, a gas inlet 22 and at least one output connector 23. The outlet of the oil pump 10 is connected to the oil inlet 21 of the oil-gas distributor 20 to receive the oil injected into the oil-gas distributor 20, and the gas inlet 22 of the oil-gas distributor 20 is connected to compressed air of a certain pressure. The oil-gas distributor 20 pumps out the input oil in a certain amount and mixes it with the input compressed air to form an oil-gas flow, and the formed oil-gas flow is continuously output through the output connector 23. The oil mist generator 30 includes an oil mist nozzle 31, which is connected to the output connector 23. The oil-gas flow output from the output connector 23 flows into the oil mist nozzle 31 and forms oil mist through the oil mist nozzle 31 and is sprayed out.

[0026] The present invention provides oil to the oil and gas distributor 20 by setting an oil pump 10 to be connected to the oil inlet 21 of the oil and gas distributor 20, and the gas inlet 22 of the oil and gas distributor 20 is also connected to compressed air of a certain pressure, so that the oil and gas distributor 20 pumps out the input oil in a certain amount and mixes it with the input compressed air to form an oil and gas flow. The oil and gas distributor 20 can accurately and quantitatively pump oil, and the accurately and quantitatively measured oil and the input compressed air are mixed in the oil and gas distributor 20 to form an oil and gas flow, and the oil and gas flow is continuously and quantitatively output. After the continuous and quantitative oil and gas flow is injected into the oil mist nozzle 31, the oil mist nozzle 31 can continuously and quantitatively generate and spray oil mist. In summary, the oil mist lubrication system 100 of the present invention can continuously and quantitatively output oil mist.

[0027] It is worth pointing out that the oil-gas distributor 20 is a volumetric distributor, and the oil output of each action is constant, such as 0.01ml, 0.02ml, 0.03ml, 0.04ml, 0.05ml, etc. After setting the corresponding value, the oil-gas distributor 20 can be controlled to accurately and quantitatively pump oil on demand, so that the accurately quantitative oil and the input compressed air are mixed in the oil-gas distributor 20 to form a continuous and quantitative oil and gas flow and output. The purpose of setting the oil-gas distributor 20 in the present invention is to achieve a micro-quantity of oil output, that is, to pump out a micro and quantitative amount of oil, so that the oil and compressed air are mixed to form the required oil and gas flow.

[0028] The oil mist lubrication of the present invention can be applied to lathe power turret gear lubrication, precision grinder spindle bearing lubrication and other occasions to control the temperature and lubrication of bearings and gears.

[0029] like Figure 1 and Figure 2As shown, the gas inlet 22 of the oil and gas distributor 20 is connected to the first input gas circuit 40, and the first input gas circuit 40 is equipped with a first solenoid valve 41 for controlling the on and off of the first input. The first solenoid valve 41 is generally in a normally open state, so that the first input gas circuit 40 continuously injects compressed air into the oil and gas distributor 20.

[0030] like Figure 1 and Figure 2 As shown, the oil pump 10 is a pneumatic pump, but is not limited thereto. The outlet of the oil pump 10 is connected to the oil inlet 21 of the oil-gas distributor 20 through an input oil circuit 50 , and a filter 51 is installed in the input oil circuit 50 to filter the oil input to the oil-gas distributor 20 .

[0031] like Figure 1 and Figure 2 As shown, the oil pump 10 is provided with an air inlet, and the air inlet of the oil pump 10 is connected to the second input air circuit 60, and the second input air circuit 60 is installed with a second solenoid valve 61 for controlling the working frequency of the oil pump 10. By controlling the switching frequency of the second solenoid valve 61, the working frequency of the oil pump 10 can be controlled, so that the oil pumping frequency to the oil and gas distributor 20 can be adjusted.

[0032] In addition, the oil-gas distributor 20 oiling frequency can be adjusted. For example, if an oil-gas distributor 20 with an oil output of 0.01 ml is selected, the oiling frequency is increased from 0.01 ml / min to 0.03 ml / min. At this time, the oil-gas distributor 20 is adjusted from the original oiling once in 1 minute to oiling three times in 1 minute. The higher the oiling frequency, the higher the proportion of oil content in the oil and gas flow output from the output connector 23, and vice versa.

[0033] like Figure 1 and Figure 2 As shown, the oil mist lubrication system 100 of the present invention is also provided with a first total input gas circuit 70, and the ends of the first total input gas circuit 70 are dispersed to form a first input gas circuit 40 and a second input gas circuit 60. The first total input gas circuit 70 is installed with a first air source processing device 71, and the first air source processing device 71 is used to filter and reduce the pressure of the input compressed air. The first total input gas circuit 70 is provided to facilitate the control of the air pressure of the compressed air. Preferably, the first air source processing device 71 includes a filter, a pressure reducing valve, and may also include an oil gauge to facilitate the observation and monitoring of the air pressure.

[0034] like Figure 1 and Figure 2As shown, the oil mist nozzle 31 is connected to the output connector 23 through the oil and gas flow input pipeline 80, and the oil mist nozzle 31 is also connected to the second total input gas circuit 90. The second total input gas circuit 90 is used to input compressed air to the oil mist nozzle 31, and the compressed air input to the oil mist nozzle 31 is mixed with the oil and gas flow to form oil mist and spray out. It is worth pointing out that the second total input gas circuit 90 is not necessary, that is to say, even if the second total input gas circuit 90 does not input compressed air to the oil mist nozzle 31, it can also generate oil mist and spray out by only relying on the oil and gas flow input pipeline 80 to input oil and gas flow to the oil mist nozzle 31. Preferably, the second total input gas circuit 90 is installed with a second air source processing device 91, and the second air source processing device 91 is used to filter and reduce the pressure of the input compressed air. The second air source processing device 91 includes a filter, a pressure reducing valve, and may also include an oil gauge to facilitate observation and monitoring of air pressure.

[0035] like Figure 1 and Figure 2 As shown, the oil mist generator 30 also includes an oil mist storage container 32, the oil mist nozzle 31 is arranged in the oil mist storage container 32, and the oil mist storage container 32 is connected to an oil mist output pipeline 33. The sprayed oil mist is temporarily stored in the oil mist storage container 32 and output to the lubrication point and the cooling point through the oil mist output pipeline 33.

[0036] like Figures 3 to 8 As shown, the present invention also makes structural innovations to the oil mist nozzle 31, so that oil mist can be generated and sprayed without separately inputting compressed air. Specifically, a structural chamber 311 is provided in the oil mist nozzle 31, and the lower end of the structural chamber 311 opens at the bottom of the oil mist nozzle 31 and forms an oil mist outlet 312. The oil mist nozzle 31 is provided with a guide body 313 in the structural chamber 311, and the guide body 313 extends downward from the top of the structural chamber 311, and the lower end of the guide body 313 is a certain distance away from the oil mist outlet 312. The guide body 313 is provided with a first channel 314, and the guide body 313 and the wall surface of the structural chamber 311 form a second channel 315, and the first channel 314 and the second channel 315 are respectively used to input oil and gas flow, or the first channel 314 is used to input oil and gas flow and the second channel 315 is used to input a mixed fluid of oil and gas flow and compressed air.

[0037] It is worth pointing out again that the "oil and gas flow" flowing out from the output connector 23 to the input oil circuit 50 is a fluid formed by mixing a certain amount of lubricating oil with compressed air. This fluid has not been atomized yet and can only form oil mist after being atomized by the oil mist nozzle 31. A conventional oil mist nozzle is provided with two flow channels, one of which is used to input compressed air, and the other is used to input a certain amount of lubricating oil droplets. The lubricating oil droplets and the compressed air are not mixed in advance, and the two flow separately. After mixing at the end of each flow channel, the oil mist is formed and sprayed out.

[0038] The present invention forms an oil-gas flow through the oil-gas distributor 20 and outputs it through the output connector 23. The oil-gas flow is input into the oil mist nozzle 31. A part of the oil-gas flow flows along the first channel 314, and a part of the oil-gas flow flows along the second channel 315. The oil-gas flow output from the first channel 314 and the oil-gas flow output from the second channel 315 are finally dispersed and mixed at the oil mist outlet 312 to form oil mist and spray out, reducing the droplet content and thus reducing the unatomized part, so as to generate more oil mist and improve the atomization effect. As can be seen from the above, neither the first channel 314 nor the second channel 315 inputs compressed air separately. By forming an oil-gas flow with the oil and compressed air in advance, the oil mist is formed only by the mixing of the two oil-gas flows, thereby achieving the purpose of improving the atomization effect, and also helping to improve the uniformity of the oil mist.

[0039] The above-mentioned solution of using the oil mist nozzle 31 to form the oil mist is to suspend the second total input air path 90 from inputting compressed air to the oil mist nozzle 31 .

[0040] In fact, the second total input air circuit 90 can also be used to input compressed air to the oil mist nozzle 31, but the injected compressed air will not flow through the first channel 314 and the second channel 315 alone. The compressed air output from the second total input air circuit 90 flows into the second channel 315 and mixes with the oil and gas flow flowing into the second channel 315 to form a mixed fluid. Due to the participation of compressed air, the mixed fluid formed in the second channel 315 can flow faster, which helps to increase the output speed and output pressure of the oil mist and adapt to different production occasions.

[0041] Furthermore, the width of the second channel 315 decreases continuously from top to bottom, and the second channel 315 forms a structure similar to a "Venturi tube". The oil and gas flow (or a mixed fluid of the oil and gas flow and compressed air) output from the second channel 315 has a high flow rate and low pressure, which can attract the oil and gas flow output from the first channel 314. The two collide and mix with each other, and finally form oil mist at the oil mist outlet 312 and spray it out.

[0042] like Figures 3 to 8As shown, the oil mist nozzle 31 includes a first column 316 and a second column 317 which are separably assembled. The bottom of the first column 316 protrudes downward to form a guide body 313. The first column 316 is provided with a guide chamber 318 which is connected with the first channel 314. The structural chamber 311 is arranged in the second column 317. The guide body 313 penetrates the structural chamber 311. The radius of the upper end of the guide body 313 is greater than or equal to the radius of the upper end of the structural chamber 311, so that the upper end of the guide body 313 is installed on the upper end of the structural chamber 311 in an interference fit or transition fit. The outer wall of the first column 316 cuts out a drainage plane 319 extending from the top of the first column 316 to the bottom of the first column 316. The drainage plane 319 is arranged vertically. The top of the first column 316 is provided with a drainage groove 3161. One end of the drainage groove 3161 is connected to the drainage chamber 318, and the other end of the drainage groove 3161 opens to the drainage plane 319. The second column 317 includes a first part 3171 and a second part 3172. The second part 3172 is arranged below the first part 3171. The radius of the first column 316 is equal to that of the first part 3171. The radius of the first part 3171 is smaller than that of the second part 3172. The first part 3171 is provided with a plurality of diversion channels 310. One end of the diversion channel 310 is connected to the upper end of the second channel 315, and the other end of the diversion channel 310 opens to the outer wall of the first part 3171.

[0043] The oil mist nozzle 31 is mounted on a device (e.g., a spray gun, Figure 7 After that, the oil and gas flow input to the flow guide chamber 318 is divided into two streams, one of which flows into the first channel 314 (i.e. Figure 7 One of the streams flows in the direction of arrow K), the other stream flows out of the drainage groove 3161, flows down along the drainage plane 319 to the side wall of the first portion 3171, then flows into the guide channel 310, and finally flows into the second channel 315 (i.e. Figure 7 Thus, by providing the drainage plane 319 and the drainage groove 3161, the oil and gas flow can be divided into two streams and flow into the first channel 314 and the second channel 315 respectively. In this way, by first merging the oil and gas flows and then dividing them, it is helpful to simplify the structure and layout.

[0044] The above description of the oil mist nozzle 31 corresponds to Figure 4 , the direction indicated by arrow Z is from top to bottom.

[0045] Please refer to Figure 7When the compressed air is input to the oil mist nozzle 31 through the second total input air path 90, the compressed air output from the second total input air path 90 flows to the outer side of the first part 3171, and the compressed air flows into the guide channel 310, and the oil and gas flow out of the guide groove 3161 also flows into the guide channel 310 and then flows into the second channel 315, and the two are mixed with each other to form the mixed fluid transported in the second channel 315. It is worth noting that the compressed air will not flow into the guide chamber 318, because the guide chamber 318 is injected with oil and gas flow, and the pressure is high, while the pressure of the second channel 315 and the structural chamber 311 is relatively low. According to the entropy increase and entropy decrease effect, the compressed air will only flow into the guide channel 310.

[0046] The following is a brief introduction to the working process of the oil mist lubrication system 100 of the present invention: the first solenoid valve 41 is opened, the second solenoid valve 61 is opened and closed according to a certain working frequency, the first input gas circuit 40 inputs compressed air of a certain pressure to the gas inlet 22 of the oil and gas distributor 20, the oil pump 10 pumps oil at a certain frequency, and the pumped oil is input to the oil inlet 21 of the oil and gas distributor 20 through the input oil circuit 50. The oil and gas distributor 20 pumps the input oil according to a certain amount and mixes it with the input compressed air to form an oil and gas flow, and outputs the oil and gas flow continuously through the output connector 23. The oil and gas flow first flows into the guide chamber 318 and is divided into two streams, one of which flows into the first channel 314 (i.e. Figure 7 One of the streams flows in the direction of arrow K), the other stream flows out of the drainage groove 3161, flows down along the drainage plane 319 to the side wall of the first portion 3171, then flows into the guide channel 310, and finally flows into the second channel 315 (i.e. Figure 7 The compressed air input by the second total input air path 90 flows to the outer side of the first part 3171, and this part of the compressed air flows into the guide channel 310 and then flows into the second channel 315, and is mixed with the oil and gas flow in the second channel 315 to form a mixed fluid. The oil and gas flow flowing out of the first channel 314 and the mixed fluid in the second channel 315 are mixed and dispersed to form oil mist, which is sprayed out from the oil mist outlet 312. The oil mist is temporarily stored in the oil mist storage container 32 and is finally output through the oil mist output pipeline 33.

[0047] The above disclosure is only a preferred embodiment of the present invention, which cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are all within the scope of the present invention.

Claims

1. An oil mist lubrication system, characterized in that: The invention comprises an oil pump, an oil-gas distributor and an oil mist generator. The oil-gas distributor is provided with an oil inlet, a gas inlet and at least one output joint. The outlet of the oil pump is connected with the oil inlet of the oil-gas distributor so as to inject oil into the oil-gas distributor. The gas inlet of the oil-gas distributor is connected with compressed air of a certain pressure. The oil-gas distributor pumps out a certain amount of input oil and mixes it with the input compressed air to form an oil-gas flow, and the formed oil-gas flow is continuously outputted through the output joint. The oil mist generator comprises an oil mist nozzle, which is connected with the output joint. The oil-gas flow outputted from the output joint flows into the oil mist nozzle and forms oil mist through the oil mist nozzle and is sprayed out.

2. The oil mist lubrication system according to claim 1, characterized in that: The gas inlet of the oil and gas distributor is connected to a first input gas circuit, and the first input gas circuit is equipped with a first solenoid valve for controlling the on-off of the first input gas circuit.

3. The oil mist lubrication system according to claim 1, characterized in that: The outlet of the oil pump is connected to the oil inlet of the oil-gas distributor via an input oil circuit, and a filter is installed on the input oil circuit.

4. The oil mist lubrication system according to claim 2, characterized in that: The oil pump is provided with an air inlet, the air inlet of the oil pump is connected to a second input air circuit, and the second input air circuit is equipped with a second solenoid valve for controlling the working frequency of the oil pump.

5. The oil mist lubrication system according to claim 4, characterized in that: A first total input gas circuit is also provided, the end of which is dispersed to form the first input gas circuit and the second input gas circuit. The first total input gas circuit is equipped with a first air source processing device, which is used to filter and / or reduce the pressure of the input compressed air.

6. The oil mist lubrication system according to claim 5, characterized in that: The oil mist nozzle is connected to the output connector via an oil and gas flow input pipeline, and the oil mist nozzle is also connected to a second total input gas circuit, and the second total input gas circuit is used to input compressed air to the oil mist nozzle. The compressed air input to the oil mist nozzle is mixed with the oil and gas flow to form oil mist and is sprayed out.

7. The oil mist lubrication system according to claim 1, characterized in that: The oil mist generator also includes an oil mist storage container, the oil mist nozzle is arranged in the oil mist storage container, and the oil mist storage container is connected to an oil mist output pipeline.

8. The oil mist lubrication system according to claim 1, characterized in that: A structural chamber is provided in the oil mist nozzle, the lower end of the structural chamber opens at the bottom of the oil mist nozzle and forms an oil mist outlet, the oil mist nozzle is provided with a guide body in the structural chamber, the guide body extends downward from the top of the structural chamber, and the lower end of the guide body is a certain distance away from the oil mist outlet, a first channel is provided in the guide body, and a second channel is formed between the guide body and the wall surface of the structural chamber, the first channel and the second channel are respectively used for inputting oil and gas flow, or the first channel is used for inputting oil and gas flow and the second channel is respectively used for inputting a mixed fluid of oil and gas flow and compressed air.

9. The oil mist lubrication system according to claim 8, characterized in that: The width of the second channel decreases continuously from top to bottom.

10. The oil mist lubrication system according to claim 8, characterized in that: The oil mist nozzle includes a first column and a second column which are detachably assembled. The bottom of the first column protrudes downward to form the guide body. The first column is provided with a guide chamber connected with the first channel. The structural chamber is provided in the second column. The guide body penetrates into the structural chamber. The radius of the upper end of the guide body is greater than or equal to the radius of the upper end of the structural chamber. The outer wall of the first column cuts out a guide plane extending from the top of the first column to the bottom of the first column. The guide plane is arranged vertically. The top of the first column is provided with a guide groove. One end of the guide groove is connected with the guide chamber, and the other end of the guide groove opens to the guide plane. The second column includes a first part and a second part. The second part is provided below the first part. The radius of the first column is equal to that of the first part. The radius of the first part is smaller than that of the second part. The first part is provided with a plurality of guide channels. One end of the guide channel is connected with the upper end of the second channel, and the other end of the guide channel opens to the outer wall of the first part.

Images