Feed liquid filling device

Abstract

The utility model relates to the technical field of liquid filling, in particular to a liquid filling device. The liquid filling valve comprises a shell, a liquid inlet pipe, a liquid outlet pipe and a pressure through hole which are communicated with an inner cavity of the shell are arranged on the shell, a valve element is arranged in the inner cavity of the shell, and the valve element has a liquid supplementing state enabling the liquid inlet pipe and the pressure through hole to be communicated with each other and a liquid injecting state enabling the liquid outlet pipe and the pressure through hole to be communicated with each other. The shell is further provided with a piston cylinder communicated with the pressure through hole, and a piston rod making reciprocating motion in the axial direction of the piston cylinder is arranged in the piston cylinder so that negative pressure or positive pressure can be generated on an inner cavity of the valve element when the valve element is in a liquid supplementing state or a liquid injecting state. On the basis that quantitative pouring and filling are achieved, cost is low, and good adaptability is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid filling, in particular to a liquid filling device. Background Art

[0002] Liquid filling equipment plays an important role in food, medicine, and daily chemical production enterprises. It can realize high-yield production of food, medicine, and daily chemical enterprises, and then help production enterprises achieve the goal of high-speed production.

[0003] As described in the text of a filling machine with an anti-overflow titled CN220412856U, a filling assembly for filling a container with liquid is provided, and a liquid level sensor for detecting the filling amount is provided on the filling assembly to achieve quantitative filling of the liquid. In actual implementation, although the liquid level sensor has a high detection accuracy, in actual implementation, the liquid level sensor has high requirements on cost and use environment. In addition, the detection accuracy of the liquid level sensor is also affected by the viscosity of the liquid. When the filled liquid has a certain viscosity, the detection effect of the liquid level sensor is often not ideal, so it is urgent to solve. Utility Model Content

[0004] In order to avoid and overcome the technical problems existing in the prior art, the utility model provides a liquid filling device which, on the basis of realizing quantitative perfusion filling, has not only low cost but also good adaptability.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A liquid filling device comprises a shell, on which is provided a liquid inlet pipe, a liquid outlet pipe and a pressure through hole connected to its inner cavity, the inner cavity of the shell is provided with a valve core, the valve core has a liquid replenishing state in which the liquid inlet pipe and the pressure through hole are connected to each other, and a liquid injection state in which the liquid outlet pipe and the pressure through hole are connected to each other, the shell is also provided with a piston cylinder connected to the pressure through hole, and a piston rod is provided in the piston cylinder for reciprocating motion along the axial direction of the piston cylinder, so as to generate negative pressure or positive pressure on the inner cavity of the valve core when the valve core is in the liquid replenishing state or the liquid injection state.

[0007] As a further solution of the utility model: the inner cavity of the shell is a horizontally distributed cylindrical cavity, the valve core is a three-way valve core with a cylindrical structure, the three-way valve core coaxially rotates in the cylindrical cavity, and the outer periphery of the three-way valve core is in contact with the cavity wall of the cylindrical cavity; the inner cavity cross-section of the three-way valve core is a T-shaped structure in which the axis of the opening is distributed radially along the three-way valve core, and the pressure through hole, liquid inlet pipe and liquid outlet pipe are circumferentially evenly distributed on the top, side and bottom of the three-way valve core in sequence.

[0008] As a further solution of the utility model: it also includes a belt conveyor mechanism for conveying containers, and a side plate is installed on the fixed seat of the belt conveyor mechanism. The side plate is fixed with a guide rod that is horizontally distributed and spans the belt conveyor mechanism, and the shell can be adjusted to slide on the rod body of the guide rod.

[0009] As a further solution of the utility model: the housing is configured as at least two groups that can be adjusted to slide on the rod body of the guide rod.

[0010] As a further solution of the utility model: the axis of the three-way valve core is parallel to the guide rod, the three-way valve core has a coaxially fixed sleeve, a stepper motor is fixed on the side plate, and a shaft rod is coaxially fixed on the conveying shaft of the stepper motor, which runs through all the sleeves and all the housings along the axial direction of the sleeves. The sleeve can be slidably adjusted along the axial direction of the shaft rod and can form a non-rotating fit with the shaft rod.

[0011] As a further solution of the utility model: the shaft rod is provided with a plurality of screw holes spaced apart along the length direction of the shaft rod, the end of the sliding sleeve passes through the shell, and a fixing bolt cooperating with the screw hole is provided on the penetrating section of the sliding sleeve, and a non-rotating fit is formed between the sliding sleeve and the shaft rod by locking the fixing bolt and the screw hole.

[0012] As a further solution of the utility model: a hydraulic cylinder for driving the piston rod to perform reciprocating motion is installed on the top of the piston cylinder.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. By utilizing the reciprocating motion of the piston rod within a constant stroke, a constant negative pressure or positive pressure can be generated in the inner cavity of the valve core and the return cavity of the piston cylinder, thereby sucking in or discharging a constant amount of liquid in the inner cavity of the valve core and / or the piston cylinder. This eliminates the need to set up a sensor to continuously monitor the perfusion level and can ensure that the amount of perfused liquid is constant. This structure not only reduces the cost of the device, but is also less affected by the viscosity of the liquid and has high adaptability.

[0015] 2. The valve core is set as a three-way valve core, so that the positions of the pressure through hole and the liquid outlet pipe can be arranged as dispersed as possible to reduce the interference between the piston cylinder at the pressure through hole and the container for receiving the liquid at the liquid outlet pipe. On this basis, the three-way valve core needs to rotate at a smaller angle during the switching process between the liquid replenishment state and the liquid injection state, ensuring the efficiency of liquid perfusion.

[0016] 3. A belt conveyor mechanism is provided for conveying the container, and the shell can be slidably adjusted on the rod body of the guide rod spanning the belt conveyor mechanism. The shell is adjusted according to the position of the opening of the container so that the liquid outlet pipe of the shell can be aligned with the container opening to ensure that the solution is stably injected into the container cavity.

[0017] 4. Through the setting of the sliding sleeve, when the housing is slidably adjusted along the guide rod, the sliding sleeve can slide synchronously on the shaft rod with the sliding adjustment of the housing, and can achieve anti-rotation cooperation with the shaft rod. In addition, the sliding sleeve separates the solution in the inner cavity of the three-way valve core from the shaft rod, ensuring the sealing of the inner cavity of the three-way valve core, and effectively preventing the liquid in the inner cavity of the three-way valve core from remaining on the outer surface of the shaft rod when the housing is slidably adjusted.

[0018] 5. The locking of the fixing bolts on the sliding sleeve and the screw holes forms a non-rotating fit between the sliding sleeve and the shaft rod. After the fixing bolts and the screw holes are locked and fixed, not only the non-rotating fit between the sliding sleeve and the shaft rod is ensured to achieve synchronous rotation, but also the position of the entire housing is locked. Therefore, there is no need to set locking pieces on the housing and the guide rod, which improves the convenience of sliding adjustment of the housing. In addition, in the specific implementation, if all housings are not required for the injection operation, the fixing bolts on the sliding sleeves in the housings that do not need to work can be removed. At this time, the rotation of the shaft rod cannot drive the rotation of the sliding sleeve and the three-way valve core, that is, the operation of part of the housing is stopped. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the liquid replenishing state of the valve core in the utility model.

[0020] Figure 2 It is a structural schematic diagram of the liquid injection state of the valve core in the utility model.

[0021] Figure 3 It is a structural schematic diagram of the utility model.

[0022] Figure 4 It is a schematic diagram of the connection structure between the sliding sleeve and the shaft rod in the utility model.

[0023] In the figure: 10, housing; 11, liquid inlet pipe; 12, liquid outlet pipe; 13, pressure through hole; 20, three-way valve core; 21, sliding sleeve; 211, fixing bolt; 30, piston cylinder; 31, piston rod; 40, hydraulic cylinder; 50, belt conveyor mechanism; 51, side plate; 52, guide rod; 60, stepping motor; 61, shaft rod; 611, screw hole. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] For ease of understanding, the specific structure and working mode of the utility model are further described below in conjunction with the accompanying drawings:

[0026] The specific structure of the utility model refers to Figure 1-4 As shown, its main structure includes a shell 10, and the shell 10 is provided with a liquid inlet pipe 11, a liquid outlet pipe 12 and a pressure through hole 13 connected to its inner cavity. Among them, the liquid inlet pipe 11 is connected to the external liquid storage tank, and is used to introduce the liquid to be filled; the liquid outlet pipe 12 is used to fill the liquid into the container; the pressure through hole 13 is connected to the negative pressure mechanism, and is used to generate positive pressure and negative pressure, so as to suck and press out the liquid. Specifically, the inner cavity of the shell 10 is provided with a valve core, and the valve core has a liquid replenishment state that makes the liquid inlet pipe 11 and the pressure through hole 13 connected to each other, and a liquid injection state that makes the liquid outlet pipe 12 and the pressure through hole 13 connected to each other; the shell 10 is also provided with a piston cylinder 30 connected to the pressure through hole 13, and the piston cylinder 30 is provided with a piston rod 31 that reciprocates along the axial direction of the piston cylinder 30, so as to generate negative pressure or positive pressure on the inner cavity of the valve core when the valve core is in the liquid replenishment state or the liquid injection state.

[0027] When in use, the valve core is initially in the Figure 1 In the refilling state shown in the figure, the liquid inlet pipe 11 and the pressure through hole 13 are connected to each other; the piston rod 31 slides in the piston cylinder 30 in the direction away from the housing 10, at this time, negative pressure is generated in the valve core cavity and the return cavity of the piston cylinder 30, so that the liquid in the external liquid storage tank flows into the valve core cavity and / or the piston cylinder 30. Thereafter, the valve core switches to the position shown in the figure. Figure 2 In the liquid injection state shown, the liquid outlet pipe 12 and the pressure through hole 13 are connected to each other; the piston rod 31 slides in the piston cylinder 30 toward the housing 10, and at this time, positive pressure is generated in the valve core cavity and the return cavity of the piston cylinder 30, so that the liquid in the valve core cavity and / or the piston cylinder 30 is injected into the container through the liquid outlet pipe 12. During the filling process, when the stroke of the piston rod 31 moving toward the process cavity is constant, the negative pressure in the valve core cavity and the return cavity of the piston cylinder 30 can be ensured to be constant, so the amount of liquid adsorbed by the negative pressure into the valve core cavity and / or the piston cylinder 30 is constant, so there is no need to set a sensor to continuously monitor the filling liquid level, and the amount of liquid filled can be guaranteed to be constant; this structure not only reduces the cost of the device, but is also less affected by the viscosity of the liquid and has high adaptability.

[0028] Specifically, Figure 1 As shown, a hydraulic cylinder 40 driving the piston rod 31 to reciprocate is installed on the top of the piston cylinder 30 to realize the automatic reciprocating motion of the piston rod 31. In specific implementation, manual driving or other linear driving structures in the prior art can also be used to realize the reciprocating motion of the piston rod 31.

[0029] Specifically, Figure 1As shown, the inner cavity of the housing 10 is a horizontally distributed cylindrical cavity, and the valve core is a three-way valve core 20 of a cylindrical structure. The three-way valve core 20 is coaxially rotatably fitted in the cylindrical cavity, and the outer periphery of the three-way valve core 20 is in contact with the cavity wall of the cylindrical cavity; in addition, the inner cavity cross section of the three-way valve core 20 is a T-shaped structure in which the through-port axis is radially distributed along the three-way valve core 20, and the pressure through hole 13, the liquid inlet pipe 11 and the liquid outlet pipe 12 are uniformly distributed circumferentially on the top, side and bottom of the three-way valve core 20 in turn. In this arrangement, the pressure through hole 13 and the liquid outlet pipe 12 are dispersed, so that the piston cylinder 30 and other components installed at the pressure through hole 13 will not interfere with the placement of the container at the liquid outlet pipe 12. In addition, the piston cylinder 30 is arranged vertically, which reduces the resistance of the piston rod 31 to the piston movement and reduces the occupation of the horizontal space.

[0030] Of course, in actual implementation, the three-way valve core 20 can also be replaced by a two-way valve core with a V-shaped inner cavity. The liquid inlet pipe 11 and the pressure through hole 13 can be symmetrically distributed on the outer periphery of the two-way valve core along the axis of the liquid outlet pipe 12. The switching effect between the liquid replenishment state and the liquid injection state can also be achieved by rotating the two-way valve core, but the liquid outlet pipe 12 is far from the piston cylinder 30, and it is difficult to arrange the piston cylinder 30 vertically. It is worth mentioning that the three-way valve core 20 is relatively small compared to the two-way valve core, on the basis of making the pressure through hole 13 and the liquid outlet pipe 12 as dispersed as possible. The angle that the three-way valve core 20 needs to rotate during the switching process between the liquid replenishment state and the liquid injection state is obviously smaller than that of the two-way valve core, so the arrangement of the three-way valve core 20 can also effectively improve the efficiency of liquid perfusion.

[0031] In actual implementation, Figure 3 As shown, the device is also provided with a belt conveyor mechanism 50 for conveying containers, so as to automatically convey the containers to the liquid outlet pipe 12 for liquid filling. In addition, a side plate 51 is installed on the fixed seat of the belt conveyor mechanism 50, and a guide rod 52 horizontally distributed and spanning the belt conveyor mechanism 50 is fixed to the side plate 51. The housing 10 can be adjusted to slide on the rod body of the guide rod 52, so that the housing 10 can be slid and adjusted on the guide rod 52 according to the position of the opening of the container, so that the liquid outlet pipe 12 of the housing 10 is aligned with the container opening, ensuring that the solution is stably injected into the container cavity.

[0032] Of course, according to actual needs, such as Figure 3 As shown, the housing 10 is provided as at least two groups that can be adjusted to slide on the rod body of the guide rod 52 to realize multi-station filling operation, and multiple housings 10 can slide and adjust on the guide rod 52, suitable for liquid filling under various working conditions. For example, it can be suitable for filling various shaped containers, and even, in special cases, the liquid inlet pipes 11 of the two housings 10 can be connected to different types of solution storage boxes to realize simultaneous filling of multiple solutions in the same container or separate filling in different containers.

[0033] In addition, in the embodiment where the housing 10 is provided with a plurality of housings, the power source for driving the three-way valve core 20 to rotate is reduced to further reduce the cost. Figure 3 and Figure 4 As shown, the axis of the three-way valve core 20 is parallel to the guide rod 52, the sliding sleeve 21 is coaxially fixedly connected in the three-way valve core 20, and a stepper motor 60 is fixed on the side plate 51. The conveying shaft of the stepper motor 60 is coaxially fixed with a shaft 61 that runs through all the sliding sleeves 21 and all the housings 10 along the axial direction of the sliding sleeves 21. The sliding sleeve 21 can be slidably adjusted along the axial direction of the shaft 61 and can form a non-rotation fit with the shaft 61. Through the arrangement of the sliding sleeve 21, when the housing 10 is slidably adjusted along the guide rod 52, the sliding sleeve 21 can slide synchronously on the shaft 61 with the sliding adjustment of the housing 10, and can achieve non-rotation fit with the shaft 61, that is, when the stepper motor 60 drives the shaft 61 to reciprocate at a specific angle, it can synchronously drive the sliding sleeve 21 and the three-way valve core 20 to rotate. In addition, the solution in the inner cavity of the three-way valve core 20 is isolated from the shaft 61 to ensure the sealing of the inner cavity of the three-way valve core 20, effectively preventing the liquid in the inner cavity of the three-way valve core 20 from remaining on the outer surface of the shaft 61 when the housing 10 is slidably adjusted.

[0034] Further, such as Figure 4 As shown, the shaft 61 is provided with a plurality of screw holes 611 spaced apart along the length direction of the shaft 61, the end of the sleeve 21 passes through the housing 10, and the through section of the sleeve 21 is provided with a fixing bolt 211 matched with the screw hole 611, and the locking of the fixing bolt 211 with the screw hole 611 forms a non-rotation fit between the sleeve 21 and the shaft 61. After the fixing bolt 211 is locked and fixed with the screw hole 611, not only the non-rotation fit between the sleeve 21 and the shaft 61 is ensured to realize synchronous rotation, but also the position of the housing 10 as a whole is locked, so there is no need to set a locking member on the housing 10 and the guide rod 52, which improves the convenience of sliding adjustment of the housing 10. In addition, in the specific implementation, if all the housings 10 do not need to be used for the perfusion operation, the fixing bolt 211 on the sleeve 21 in the housing 10 that does not need to work can be disassembled, at this time, the rotation of the shaft 61 cannot drive the rotation of the sleeve 21 and the three-way valve core 20, that is, the operation of part of the housing 10 is stopped.

[0035] Of course, for those skilled in the art, the present invention is not limited to the details of the exemplary embodiments described above, but also includes the same or similar structures that can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to include all changes that fall within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0037] The technology, shape and structure parts not described in detail in the present invention are all known technologies.

Claims

1. A liquid filling device, characterized in that: The invention comprises a shell (10), wherein the shell (10) is provided with a liquid inlet pipe (11), a liquid outlet pipe (12) and a pressure through hole (13) which are connected to its inner cavity, and the inner cavity of the shell (10) is provided with a valve core, wherein the valve core has a liquid replenishing state in which the liquid inlet pipe (11) and the pressure through hole (13) are connected to each other, and a liquid injection state in which the liquid outlet pipe (12) and the pressure through hole (13) are connected to each other, and the shell (10) is also provided with a piston cylinder (30) connected to the pressure through hole (13), wherein a piston rod (31) is provided in the piston cylinder (30) and reciprocates along the axial direction of the piston cylinder (30), so as to generate negative pressure or positive pressure on the inner cavity of the valve core when the valve core is in the liquid replenishing state or the liquid injection state.

2. A liquid filling device according to claim 1, characterized in that: The inner cavity of the shell (10) is a horizontally distributed cylindrical cavity, and the valve core is a three-way valve core (20) of a cylindrical structure. The three-way valve core (20) is coaxially rotatably fitted in the cylindrical cavity, and the outer periphery of the three-way valve core (20) is in contact with the cavity wall of the cylindrical cavity; the inner cavity cross-section of the three-way valve core (20) is a T-shaped structure in which the axis of the opening is distributed radially along the three-way valve core (20), and the pressure through hole (13), the liquid inlet pipe (11) and the liquid outlet pipe (12) are uniformly distributed circumferentially on the top, side and bottom of the three-way valve core (20) in sequence.

3. A liquid filling device according to claim 2, characterized in that: It also includes a belt conveyor mechanism (50) for conveying containers, wherein a side plate (51) is installed on a fixed seat of the belt conveyor mechanism (50), and a guide rod (52) distributed horizontally and spanning the belt conveyor mechanism (50) is fixed to the side plate (51), and the housing (10) can be adjusted and slid on the rod body of the guide rod (52).

4. A liquid filling device according to claim 3, characterized in that: The housing (10) is configured to be adjustable and slidable in at least two groups on the rod body of the guide rod (52).

5. A liquid filling device according to claim 4, characterized in that: The axis of the three-way valve core (20) is parallel to the guide rod (52); a sliding sleeve (21) is coaxially fixedly connected inside the three-way valve core (20); a stepping motor (60) is fixed on the side plate (51); a shaft (61) is coaxially fixed on the conveying shaft of the stepping motor (60) and runs through the entire sliding sleeve (21) and the entire housing (10) along the axial direction of the sliding sleeve (21); the sliding sleeve (21) can be slidably adjusted along the axial direction of the shaft (61) and can form a non-rotating fit with the shaft (61).

6. A liquid filling device according to claim 5, characterized in that: The shaft rod (61) is provided with a plurality of screw holes (611) spaced apart along the length direction of the shaft rod (61); the end of the sliding sleeve (21) passes through the housing (10); and a fixing bolt (211) matching with the screw hole (611) is provided on the through section of the sliding sleeve (21); the locking of the fixing bolt (211) and the screw hole (611) forms a non-rotating fit between the sliding sleeve (21) and the shaft rod (61).

7. A liquid filling device according to any one of claims 1 to 6, characterized in that: A hydraulic cylinder (40) is installed on the top of the piston cylinder (30) for driving the piston rod (31) to perform reciprocating motion.

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