Liquid injection pump

Abstract

The utility model provides a liquid injection pump which comprises a pump head, a first connector, a second connector, a connector sealing ring, a linear driving unit and a rotary driving unit, a conversion cavity, a working cavity, a valve element and a piston are arranged in the pump head, the conversion cavity is communicated with the working cavity, and the first connector and the second connector can be communicated with the conversion cavity. The first connector and the second connector are both provided with connector sealing rings, the valve element is arranged in the conversion cavity, the piston is arranged in the working cavity, the rotary driving unit is connected with the valve element, the linear driving unit is connected with the piston, an infiltration channel is formed in the pump head, and the pump head is provided with an isolation liquid outlet and an isolation liquid inlet which are communicated with the infiltration channel. The connector sealing ring is at least partially located in the infiltration channel. According to the liquid injection pump, accumulation and crystallization on the outer side of the connector sealing ring can be prevented, the service life of the connector sealing ring is prolonged, and the sealing effect of the connector sealing ring is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid injection pump technical field, concretely relates to a liquid injection pump. BACKGROUND

[0002] The application range of liquid injection pump is very extensive, for example, has the application in petroleum, chemical industry, pharmacy, food, energy etc. field. In the food industry, liquid injection pump is used for conveying liquid food, for example, water, beverage, cane sugar solution etc., when conveying cane sugar solution, brine etc. solution that crystallization is easy to appear, the sealing ring near the rotating valve of liquid injection pump will have crystallization accumulated on the outside of sealing ring with the lapse of time, leading to the service life of sealing ring shortening, and the sealing effect is poor. SUMMARY

[0003] The utility model discloses a liquid injection pump, which aims to solve the problem of crystallization easily occurring on the outside of the sealing ring of the existing liquid injection pump.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] Provide a kind of liquid injection pump, including pump head, first connector, second connector, connector sealing ring, linear drive unit and rotary drive unit, the inside of the pump head is equipped with conversion cavity, working cavity, valve core and piston, the conversion cavity with the working cavity is communicated, the first connector with the second connector can be communicated with the conversion cavity, the first connector with the second connector are equipped with the connector sealing ring, the valve core is located in the conversion cavity, the piston is located in the working cavity, the rotary drive unit is connected with the valve core, the linear drive unit is connected with the piston, the inside of the pump head is equipped with infiltration passage, the pump head is equipped with the isolation liquid outlet and isolation liquid inlet communicated with the infiltration passage, the connector sealing ring is at least partially located in the infiltration passage.

[0006] Optionally, the connection of the conversion cavity and the working cavity is provided with the connector sealing ring.

[0007] Optionally, the pump head is provided with two isolation liquid connectors, one of the isolation liquid connectors is provided with the isolation liquid outlet, and the other isolation liquid connector is provided with the isolation liquid inlet.

[0008] Optionally, the liquid injection pump further comprises an isolation sealing ring, the first connector and the second connector are both provided with the isolation sealing ring, and the isolation sealing ring is located on the side of the connector sealing ring away from the valve core.

[0009] Optionally, the inside of the pump head is provided with a valve sleeve, the valve core is arranged in the valve sleeve, and the infiltration passage is arranged in the valve sleeve, and the infiltration passage is not communicated with the conversion cavity.

[0010] Optionally, a wiper seal ring is arranged between the valve sleeve and the pump head.

[0011] Optionally, a rotary valve seal ring is arranged between the valve core and the valve sleeve.

[0012] Optionally, the linear drive unit is a pneumatic linear drive or an electric linear drive.

[0013] Optionally, the rotary drive unit is a pneumatic rotary drive or an electric rotary drive.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] When conveying sucrose solution, saline and other solutions prone to crystallization, the joint seal ring near the rotary valve of the liquid injection pump will have crystallization accumulated on the outer side of the joint seal ring over time, resulting in shortened service life of the seal ring and poor sealing effect. In the liquid injection pump provided by the utility model, water can be used as the isolation liquid, the isolation liquid enters the wiper channel from the isolation liquid inlet, and the isolation liquid sequentially passes through each joint seal ring, thereby diluting the crystallization near the joint seal ring, allowing the crystallization near the joint seal ring to dissolve in water, and then flowing out through the isolation liquid outlet, so that crystallization is prevented from accumulating on the outer side of the joint seal ring, the service life of the joint seal ring is prolonged, and the sealing effect of the joint seal ring is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0017] Fig. 1 It is a structure schematic view of the liquid injection pump of the utility model;

[0018] Fig. 2 It is an internal structure schematic view of the liquid injection pump of the utility model;

[0019] Fig. 3 It is an internal structure schematic view of the liquid injection pump of the utility model from another angle.

[0020] In the figure: 1, pump head; 2, first joint; 3, second joint; 4, joint sealing ring; 5, linear drive unit; 6, rotary drive unit; 7, conversion cavity; 8, working cavity; 9, valve core; 10, piston; 11, infiltration channel; 12, isolation liquid joint; 13, valve sleeve; 14, infiltration sealing ring; 15, rotary valve sealing ring; 16, isolation sealing ring. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0022] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0023] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features.

[0024] The technical solutions of the present application will be described below. Figs. 1-3 The present application provides a liquid injection pump.

[0025] As shown in Figs. 1-3 The present application provides a liquid injection pump, which comprises a pump head 1, a first joint 2, a second joint 3, a joint sealing ring 4, a linear drive unit 5 and a rotary drive unit 6. The inside of the pump head 1 is provided with a conversion cavity 7, a working cavity 8, a valve core 9 and a piston 10. The conversion cavity 7 is in communication with the working cavity 8. The first joint 2 and the second joint 3 can both communicate with the conversion cavity 7. The first joint 2 and the second joint 3 are both provided with a joint sealing ring 4. The valve core 9 is arranged in the conversion cavity 7. The piston 10 is arranged in the working cavity 8. The rotary drive unit 6 is connected with the valve core 9. The linear drive unit 5 is connected with the piston 10. The inside of the pump head 1 is provided with an infiltration channel 11. The pump head 1 is provided with an isolation liquid outlet and an isolation liquid inlet in communication with the infiltration channel 11. The joint sealing ring 4 is at least partially located in the infiltration channel 11.

[0026] Specifically, the liquid to be delivered enters the conversion cavity 7 and the working cavity 8 through the first joint 2, the rotary drive unit 6 drives the valve core 9 to rotate to close the first joint 2, and the linear drive unit 5 drives the piston 10 to move to push the liquid to be delivered out of the second joint 3.

[0027] When the solution such as sucrose solution and salt water is easy to crystallize, the joint sealing ring 4 near the rotating valve of the liquid injection pump will accumulate crystals on the outside of the joint sealing ring 4 over time, resulting in a shortened service life of the sealing ring and poor sealing effect. In the liquid injection pump provided by the utility model, water can be used as the isolation liquid, the isolation liquid enters the infiltration channel 11 from the isolation liquid inlet, and the isolation liquid sequentially passes through each joint sealing ring 4, can dilute the crystals near the joint sealing ring 4, so that the crystals near the joint sealing ring 4 can be dissolved in water, and then flow out through the isolation liquid outlet, thereby preventing the outside of the joint sealing ring 4 from accumulating crystals, prolonging the service life of the joint sealing ring 4, and improving the sealing effect of the joint sealing ring 4.

[0028] In some embodiments, a joint sealing ring 4 is arranged at the connection between the conversion cavity 7 and the working cavity 8, further improving the sealing effect.

[0029] In some embodiments, two isolation liquid joints 12 are arranged on the pump head 1, one of which is provided with an isolation liquid outlet, and the other is provided with an isolation liquid inlet, facilitating connection with an external water pump, enabling water to be used as the isolation liquid, and then injecting water into the infiltration channel 11 to dissolve the crystals before leaving the infiltration channel 11, making the use more convenient.

[0030] It can be understood that the number of isolation liquid joints 12 is two, one of which is an isolation liquid outlet, and the other is an isolation liquid inlet, the functions of the two isolation liquid joints 12 can be switched, and the specific isolation liquid inlet and outlet directions are not limited.

[0031] Optionally, the liquid injection pump further comprises an isolation sealing ring 16, the first joint 2 and the second joint 3 are each provided with an isolation sealing ring 16, the isolation sealing ring 16 is located on the side of the joint sealing ring 4 away from the valve core 9, and the isolation sealing ring 16 is used to isolate the internal space of the liquid injection pump, and can prevent the isolation liquid from leaking.

[0032] In some embodiments, a valve sleeve 13 is arranged in the pump head 1, the valve core 9 is arranged in the valve sleeve 13, and the infiltration channel 11 is arranged in the valve sleeve 13. The infiltration channel 11 is not in communication with the conversion cavity 7. By arranging the valve sleeve 13, a more stable working space can be provided for the valve core 9.

[0033] In some embodiments, an infiltration sealing ring 14 is arranged between the valve sleeve 13 and the pump head 1, and the sealing effect is better.

[0034] In some embodiments, a rotary valve sealing ring 15 is arranged between the valve core 9 and the valve sleeve 13, and the sealing effect is better.

[0035] In some embodiments, the linear drive unit 5 is a pneumatic linear drive or an electric linear drive, which can better realize the linear drive function.

[0036] Specifically, the linear drive unit 5 is a linear cylinder, or a servo motor or a stepper motor is used to realize linear motion through a ball screw drive linear motion mode.

[0037] In some embodiments, the rotary drive unit 6 is a pneumatic rotary drive or an electric rotary drive, which can better drive the valve core 9 to rotate.

[0038] The above only describes the embodiments of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, is also included in the patent protection range of the present application.

Claims

1. A liquid infusing pump characterized by, The injection pump comprises a pump head (1), a first joint (2), a second joint (3), a joint sealing ring (4), a linear drive unit (5) and a rotary drive unit (6), the inside of the pump head (1) is provided with a conversion cavity (7), a working cavity (8), a valve core (9) and a piston (10), the conversion cavity (7) communicates with the working cavity (8), the first joint (2) and the second joint (3) can both communicate with the conversion cavity (7), the first joint (2) and the second joint (3) are both provided with the joint sealing ring (4), the valve core (9) is arranged in the conversion cavity (7), the piston (10) is arranged in the working cavity (8), the rotary drive unit (6) is connected with the valve core (9), the linear drive unit (5) is connected with the piston (10), the inside of the pump head (1) is provided with an infiltration channel (11), the pump head (1) is provided with an isolation liquid outlet and an isolation liquid inlet which communicate with the infiltration channel (11), and the joint sealing ring (4) is at least partially located in the infiltration channel (11).

2. The liquid filling pump according to claim 1, wherein The joint sealing ring (4) is arranged at the connection between the conversion cavity (7) and the working cavity (8).

3. The liquid infusing pump of claim 1, wherein, The pump head (1) is provided with two isolation liquid joints (12), one of the isolation liquid joints (12) is provided with the isolation liquid outlet, and the other isolation liquid joint (12) is provided with the isolation liquid inlet.

4. The liquid infusing pump of claim 1, wherein, The injection pump further comprises an isolation sealing ring (16), the first joint (2) and the second joint (3) are both provided with the isolation sealing ring (16), and the isolation sealing ring (16) is located on the side of the joint sealing ring (4) away from the valve core (9).

5. The liquid infusing pump of claim 1, wherein, The inside of the pump head (1) is provided with a valve sleeve (13), the valve core (9) is arranged in the valve sleeve (13), and the infiltration channel (11) is arranged in the valve sleeve (13) and does not communicate with the conversion cavity (7).

6. The liquid infusing pump of claim 5, wherein, The infiltration sealing ring (14) is arranged between the valve sleeve (13) and the pump head (1).

7. The liquid infusing pump of claim 6, wherein, The valve core (9) and the valve sleeve (13) are provided with a valve sealing ring (15).

8. The liquid infusing pump of claim 1, wherein, The linear drive unit (5) is a pneumatic linear drive or an electric linear drive.

9. The liquid infusing pump of claim 1, wherein, The rotary drive unit (6) is a pneumatic rotary drive or an electric rotary drive.

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