Overflow back-suction type filling head

Abstract

The utility model discloses an overflow back suction type filling head which comprises a filling part, an inner gas path and an outer liquid path are arranged in the filling part, the inner gas path is arranged in the height direction of the filling part, the inner gas path is sequentially provided with a gas outlet, a gas suction port and a mixing port in the height direction of the filling part, the liquid outlets are evenly distributed around a gas outlet pipe, and the outer liquid path is arranged in the filling part. The liquid outlet is higher than the mixing opening, and a photoelectric liquid level sensor is arranged at the bottom of the filling part. When the liquid level exceeds the preset liquid level, the air outlet is closed, and the air suction port pumps the overflowing liquid back from the air outlet pipe; when it is detected that the liquid level drops, the air outlet is opened, backflow is formed between the air outlet and the air suction port, continuous absorption of liquid in the liquid level is avoided, and therefore the effects of overflowing back absorption and improvement of the liquid and air mixing effect are achieved.

Description

Technical Field

[0001] The utility model relates to the field of filling accessories, in particular to an overflow back-suction type filling head. Background Art

[0002] Filling machines are mainly a small category of packaging machines. From the perspective of material packaging, they can be divided into liquid filling machines, paste filling machines, powder filling machines, and granule filling machines; from the degree of production automation, they can be divided into semi-automatic filling machines and fully automatic filling production lines. Recently, with the QS certification of food, beverage filling manufacturers have begun to pay attention to product quality and packaging, so liquid filling machines have become prominent in filling machines.

[0003] In the prior art, a Chinese invention patent with application number "CN201410579592.7" discloses such a filling head and filling equipment. During the liquid filling process, due to the different volumes of the bottle bodies, liquid overflow is prone to occur. At the same time, when filling liquid mixed with powder, the liquid is prone to precipitation and stratification. Utility Model Content

[0004] The utility model aims to provide an overflow back-suction type filling head, which has the effects of overflow back-suction and enhanced mixing.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions: an overflow back-suction filling head, comprising a filling part, wherein an inner air path and an outer liquid path are arranged in the filling part, wherein the inner air path is arranged along the height direction of the filling part, and wherein the inner air path is sequentially provided with an air outlet, an air intake port and a mixing port in the height direction of the filling part,

[0006] An on-off structure for controlling the on-off of the air outlet and the air intake is arranged between the air outlet and the air intake, the inner air path extends downward to form an air outlet pipe, the mixing port is arranged at the bottom of the air outlet pipe, the outer liquid path is provided with a liquid outlet pipe surrounding the air outlet pipe, a liquid inlet is arranged above the outer liquid path, a liquid outlet is arranged at the bottom of the liquid outlet pipe, the liquid outlets are evenly distributed around the air outlet pipe, the liquid outlet is higher than the mixing port, and a photoelectric liquid level sensor is arranged at the bottom of the filling part.

[0007] Preferably, the on-off structure includes an on-off port, a connecting rod, a plug, a clamping cover and a linear stepper motor. The on-off port is arranged between the air outlet and the air intake port, the plug cooperates with the on-off port, the diameter stepper motor is connected to one end of the connecting rod, the other end of the connecting rod is connected to the plug, and the clamping cover is provided with a connecting hole for the connecting rod to pass through.

[0008] By adopting the above technical solution, the internal air path is controlled to be on and off at the on-off position, and the return air channel is closed.

[0009] Preferably, a pressurizing chamber is arranged above the on-off port, a flow chamber is arranged below the on-off port, and a conical surface is arranged on the side surface of the on-off port.

[0010] By adopting the above technical solution, the calibers of the pressurizing chamber and the internal air path are different, thereby increasing the negative pressure in the pressurizing chamber.

[0011] Preferably, a pressure spring is arranged between the plug and the clamping cover, a lower fixing groove connected to the pressure spring is arranged on the inner side of the plug, and an upper fixing groove connected to the pressure spring is arranged on the inner side of the clamping cover.

[0012] By adopting the above technical solution, the effect of rapid switching is improved, especially the reaction speed of the plug movement when the linear stepper motor is started.

[0013] Preferably, the pressurizing chamber is arranged to penetrate the penetrating portion upward, a sealing block cooperating with the pressurizing chamber is arranged at the bottom of the clamping cover, the connecting hole is arranged to penetrate the sealing block, and a first sealing ring is arranged in the upper fixing groove of the connecting hole.

[0014] By adopting the above technical solution, the first sealing ring has a sealing effect at the connecting rod position.

[0015] Preferably, a motor seat is arranged above the clamping cover, the connecting hole passes through the motor seat, and a second sealing ring is arranged between the motor seat and the clamping cover.

[0016] By adopting the above technical solution, the second sealing ring further improves the sealing effect of the connecting rod position, and the motor seat plays a role in fixing the linear stepper motor.

[0017] Preferably, the air outlet and the air intake are connected to the internal air path along the horizontal direction of the filling part.

[0018] By adopting the above technical solution, the subsequent connection of the quick connector is facilitated

[0019] Preferably, an annular groove for connecting a liquid outlet pipe and an air outlet pipe is provided at the bottom of the filling portion, and the liquid outlet pipe is concentrically arranged with the air outlet pipe.

[0020] By adopting the above technical solution, the liquid outlet pipe and the air outlet pipe are fixed.

[0021] To summarize, during the filling process, the liquid is injected into the liquid outlet pipe from the liquid inlet, the liquid flows downward from the liquid outlet of the liquid outlet pipe, and the gas outlet outputs gas at the same time. The liquid flows from the liquid outlet to below the mixing port to improve the mixing effect in the liquid. At the same time, the photoelectric liquid level sensor at the bottom of the filling part detects the liquid level change. When the predetermined liquid level is exceeded, the gas outlet is closed, and the air intake port draws the overflowing liquid back from the gas outlet pipe; when the liquid level drops, the gas outlet is opened to form a reflux at the gas outlet and the air intake port to avoid continuous absorption of the liquid on the liquid surface, thereby playing the role of overflow back suction and improving the mixing effect of liquid and air. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of Example 1;

[0023] Figure 2 is a schematic structural diagram of Example 2;

[0024] Figure 3 yes Figure 2 An enlarged schematic diagram of part A is shown;

[0025] Figure 4 yes Figure 2 The enlarged schematic diagram of part B is shown;

[0026] In the figure, 1, filling part; 11, photoelectric liquid level sensor; 12, annular groove; 2, internal air circuit; 21, air outlet; 22, air intake; 23, mixing port; 24, air outlet pipe; 3, external liquid circuit; 31, liquid outlet pipe; 32, liquid inlet; 33, liquid outlet; 41, on-off port; 42, conical surface; 43, pressurizing chamber; 44, connecting rod; 45, plug; 46, first sealing ring; 47, second sealing ring; 51, pressurizing spring; 52, lower fixing groove; 53, upper fixing groove; 61, clamping cover; 62, sealing block; 63, connecting hole; 71, motor seat; 72, linear stepping motor. DETAILED DESCRIPTION

[0027] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0028] 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, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0029] Embodiment 1:

[0030] like Figure 1As shown, an overflow back-suction filling head comprises a filling part 1, which is formed by cutting of aluminum alloy, and a hole is drilled inside the filling part 1 to form an inner air path 2 and an outer liquid path 3, the inner air path 2 extends along the height direction of the filling part 1, and the inner air path 2 is sequentially provided with an air outlet 21, an air intake 22 and a mixing port 23 in the height direction of the filling part 1, and the air outlet 21 and the air intake 22 are connected with the inner air path 2 along the horizontal direction of the filling part 1; the air outlet 21 and the air intake 22 are externally connected with a quick connector, and at the same time, the quick connector is externally connected with an electromagnetic valve through a hose, and the electromagnetic valve outside the air intake 22 needs to be connected with a return liquid pipeline for the return of liquid; a photoelectric liquid level sensor 11 is provided at the bottom of the filling part 1, and the photoelectric liquid level sensor 11 is used to detect the height of the liquid level in the bottle.

[0031] In order to facilitate the processing of the inner gas path 2 , the inner gas path 2 is arranged to penetrate to the top of the filling part 1 , and a sealed compression cover 61 is arranged at the penetration position.

[0032] like Figure 1 and Figure 3 As shown, the inner gas path 2 extends downward to form an air outlet pipe 24, the mixing port 23 is arranged at the bottom of the air outlet pipe 24, and the outer liquid path 3 is provided with a liquid outlet pipe 31 around the air outlet pipe 24, that is, the liquid outlet pipe 31 is concentrically arranged on the outside of the air outlet pipe 24, and a liquid inlet 32 ​​is arranged above the outer liquid path 3, that is, the liquid inlet 32 ​​passes through the side wall of the liquid outlet pipe 31 in the horizontal direction, and a liquid outlet 33 is arranged at the bottom of the liquid outlet pipe 31, and a plurality of liquid outlets 33 are evenly distributed around the air outlet pipe 24, and the liquid outlet 33 is higher than the mixing port 23 to facilitate the back suction of overflow.

[0033] like Figure 1 As shown, in order to facilitate the connection between the liquid outlet pipe 31 and the air outlet pipe 24 at the bottom of the filling part 1, two annular grooves 12 for connecting the liquid outlet pipe 31 and the air outlet pipe 24 are provided at the bottom of the filling part 1, and the liquid outlet pipe 31 is concentrically arranged with the air outlet pipe 24.

[0034] Working principle:

[0035] During the filling process, the liquid is injected into the liquid outlet pipe 31 from the liquid inlet 32, and the liquid flows downward from the liquid outlet 33 of the liquid outlet pipe 31. At the same time, the gas outlet 21 outputs gas, and the liquid flows from the liquid outlet 33 to below the mixing port 23 to improve the mixing effect in the liquid. At the same time, the photoelectric liquid level sensor 11 at the bottom of the filling part 1 detects the liquid level change. When the predetermined liquid level is exceeded, the gas outlet 21 is closed, and the air suction port 22 draws the overflowing liquid back from the gas outlet pipe 24; when the liquid level drops, the gas outlet 21 is opened to form a reflux between the gas outlet 21 and the air suction port 22 to avoid continuous absorption of the liquid on the liquid surface.

[0036] Embodiment 2:

[0037] like Figures 2 to 4As shown, the difference between Example 2 and Example 1 is that an on-off structure is added in Example 2, and the on-off structure is arranged between the air outlet 21 and the air intake 22, and controls the on-off of the air outlet 21 and the air intake 22 at the same time.

[0038] like Figures 2 to 4 As shown, the on-off structure includes an on-off port 41, a connecting rod 44, a plug 45, a clamping cover 61 and a linear stepping motor 72. The on-off port 41 is arranged between the air outlet 21 and the air intake port 22. The plug 45 cooperates with the on-off port 41. The diameter stepping motor is connected to one end of the connecting rod 44, and the other end of the connecting rod 44 is connected to the plug 45. The clamping cover 61 is provided with a connecting hole 63 for the connecting rod 44 to pass through. A pressurizing chamber 43 is arranged above the on-off port 41. The diameter of the pressurizing chamber 43 is larger than the diameter of the on-off port 41. The bottom of the on-off port 41 is a flow chamber. The side of the on-off port 41 is provided with a conical surface 42.

[0039] like Figures 2 to 4 As shown, in order to enhance the starting speed of the on-off position of the linear motor, a pressure spring 51 is arranged between the plug 45 and the clamping cover 61, a lower fixed groove 52 connected to the pressure spring 51 is arranged on the inner side of the plug 45, and an upper fixed groove 53 connected to the pressure spring 51 is arranged on the inner side of the clamping cover 61. The upper fixed groove 53 and the lower fixed groove 52 serve to fix the pressure spring 51.

[0040] like Figures 2 to 4 As shown, in order to enhance the sealing effect, the pressurizing chamber 43 is arranged to penetrate the through-portion upwardly, a sealing block 62 cooperating with the pressurizing chamber 43 is arranged at the bottom of the pressing cover 61, a connecting hole 63 is arranged to penetrate the sealing block 62, and a first sealing ring 46 is arranged in the upper fixed groove 53 of the connecting hole 63; a motor seat 71 is arranged above the pressing cover 61, the connecting hole 63 is arranged to penetrate the motor seat 71, and a second sealing ring 47 is arranged between the motor seat 71 and the pressing cover 61.

[0041] Working principle: Compared with Example 1, during filling, Example 2 moves the plug 45 downward through the linear stepper motor 72 to close the on-off port 41, thereby preventing the negative pressure in the pressurizing chamber 43 from being connected to the bottom; during overflow back-sucking, the linear stepper motor 72 moves the plug 45 upward to open the on-off port 41, thereby connecting the pressurizing chamber 43 with the mixing port 23, and back-sucking the liquid overflowing from the liquid surface.

Claims

1. An overflow back-suction filling head, characterized in that: The filling part comprises an inner gas path and an outer liquid path, the inner gas path is arranged along the height direction of the filling part, and the inner gas path is sequentially provided with an air outlet, an air intake port and a mixing port in the height direction of the filling part. An on-off structure for controlling the on-off of the air outlet and the air intake is arranged between the air outlet and the air intake, the inner air path extends downward to form an air outlet pipe, the mixing port is arranged at the bottom of the air outlet pipe, the outer liquid path is provided with a liquid outlet pipe surrounding the air outlet pipe, a liquid inlet is arranged above the outer liquid path, a liquid outlet is arranged at the bottom of the liquid outlet pipe, the liquid outlets are evenly distributed around the air outlet pipe, the liquid outlet is higher than the mixing port, and a photoelectric liquid level sensor is arranged at the bottom of the filling part.

2. The overflow back-suction filling head according to claim 1, characterized in that: The on-off structure includes an on-off port, a connecting rod, a plug, a clamping cover and a linear stepper motor. The on-off port is arranged between the air outlet and the air intake port, the plug cooperates with the on-off port, the linear stepper motor is connected to one end of the connecting rod, the other end of the connecting rod is connected to the plug, and the clamping cover is provided with a connecting hole for the connecting rod to pass through.

3. The overflow back-suction filling head according to claim 2, characterized in that: A pressurizing chamber is arranged above the on-off opening, a flow chamber is arranged below the on-off opening, and a conical surface is arranged on the side surface of the on-off opening.

4. The overflow back-suction filling head according to claim 3 is characterized in that: A pressure spring is arranged between the plug and the pressing cover, a lower fixing groove connected to the pressure spring is arranged on the inner side of the plug, and an upper fixing groove connected to the pressure spring is arranged on the inner side of the pressing cover.

5. The overflow back-suction filling head according to claim 4 is characterized in that: The pressurizing chamber is arranged to penetrate upwardly through the penetration portion, a sealing block cooperating with the pressurizing chamber is arranged at the bottom of the clamping cover, the connecting hole is arranged to penetrate through the sealing block, and a first sealing ring is arranged in the upper fixing groove of the connecting hole.

6. The overflow back-suction filling head according to claim 5, characterized in that: A motor seat is arranged above the pressing cover, the connecting hole passes through the motor seat, and a second sealing ring is arranged between the motor seat and the pressing cover.

7. The overflow back-suction filling head according to claim 1, characterized in that: The air outlet and the air inlet are communicated with the internal air path along the horizontal direction of the filling part.

8. The overflow back-suction filling head according to claim 1, characterized in that: The bottom of the filling part is provided with an annular groove for connecting a liquid outlet pipe and an air outlet pipe, and the liquid outlet pipe is concentrically arranged with the air outlet pipe.

Images