Novel diaphragm type liquid medicine quantitative pump

Abstract

The utility model relates to the technical field of diaphragm type pumps, and discloses a novel diaphragm type liquid medicine quantitative pump which comprises a middle body, a motor is arranged on the top of the middle body, a pump body is connected to the left end of the middle body, and a coupler is arranged in the middle body. An output shaft of the motor penetrates through the top of the middle body and is connected with a worm through a coupler, an eccentric wheel is arranged in the middle body and located below the worm, an eccentric wheel plug is installed on the eccentric wheel, and one end of the eccentric wheel is connected with a connecting rod. By arranging the diaphragm damage sensor, once the diaphragm is broken, the sensor triggers an automatic linkage protection function to ensure the system safety, the introduction of the metering pump further optimizes the driving mode of the diaphragm, and the pump effectively relieves the problem of concentrated stress of the diaphragm under direct mechanical driving through uniform driving of hydraulic oil, so that the service life of the diaphragm is prolonged. The service life of the diaphragm is prolonged; and the working pressure upper limit is improved.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm pump technology, specifically a novel diaphragm-type quantitative pump for dispensing pharmaceutical solutions. Background Technology

[0002] A diaphragm-type metering pump for pharmaceutical solutions is a device that uses a diaphragm for metering. It boasts advantages such as corrosion resistance, small size, and high cost-effectiveness, and is widely used in industries such as pharmaceuticals, food and beverage, and petrochemicals for metering and adding highly corrosive, toxic, highly viscous, and high-pressure media. The diaphragm-type metering pump achieves reciprocating motion through a specially designed flexible diaphragm driven by a mechanism, completing the suction and discharge process. Due to the isolation effect of the diaphragm, the metered fluid is isolated from the driving and lubrication mechanisms in an electric diaphragm pump.

[0003] Existing diaphragm-type metering pumps for dispensing pharmaceutical solutions cannot detect diaphragm rupture in a timely manner, making it impossible to ensure the safe operation of the system. Furthermore, direct mechanical drive can easily lead to stress concentration on the diaphragm, thereby shortening the diaphragm's lifespan and reducing the upper limit of the working pressure. Therefore, there is an urgent need for a new type of diaphragm-type metering pump for dispensing pharmaceutical solutions to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this invention is to provide a novel diaphragm-type metering pump for dispensing medicines, in order to solve the problems mentioned in the background art. In the case of existing diaphragm-type metering pumps for dispensing medicines, once the diaphragm breaks, it cannot be detected in time, making it impossible to ensure the safe operation of the system. Secondly, direct mechanical drive can easily lead to stress concentration on the diaphragm, thereby shortening the diaphragm life and reducing the upper limit of the working pressure.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A novel diaphragm-type metering pump for liquid medicine includes an intermediate body. A motor is mounted on the top of the intermediate body, and a pump body is connected to the left end of the intermediate body. A coupling is installed inside the intermediate body, and the output shaft of the motor passes through the top of the intermediate body and is connected to a worm gear through the coupling. An eccentric wheel is located inside the intermediate body and below the worm gear, and an eccentric wheel plug is installed on the eccentric wheel. One end of the eccentric wheel is connected to a connecting rod, and one end of the connecting rod is connected to a plunger. An outlet valve is located at the upper end of the pump body, and an inlet valve is located at the lower end of the pump body. A diaphragm is located to the left of the plunger. An oil filling hole is located in the middle of the top of the intermediate body. A metering pump is installed on the intermediate body and on one side of the outlet valve. A diaphragm damage sensor is installed on one side of the diaphragm.

[0007] As a preferred embodiment of this invention, the diaphragm is made of polytetrafluoroethylene and is circular in shape.

[0008] As a preferred embodiment of this utility model, a safety valve is installed on the intermediate body and on one side of the inlet valve.

[0009] As a preferred embodiment of this utility model, the number of oil filling holes is set to two, and the two oil filling holes are respectively located on the left and right sides of the motor.

[0010] As a preferred technical solution of this utility model, the safety valve is a direct-acting relief valve.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] This invention incorporates a diaphragm damage sensor. Once the diaphragm ruptures, the sensor triggers an automatic interlock protection function to ensure system safety. Furthermore, the introduction of a metering pump further optimizes the diaphragm's driving method. Through the uniform driving of hydraulic oil, the pump effectively alleviates the problem of concentrated force on the diaphragm under direct mechanical drive, thereby extending the diaphragm's lifespan and increasing the upper limit of the working pressure. Attached Figure Description

[0013] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a cross-sectional view of the overall structure of this utility model.

[0016] In the diagram: 1. Intermediate body; 2. Oil filling hole; 3. Motor; 4. Coupling; 5. Worm gear; 6. Connecting rod; 7. Eccentric wheel plug; 8. Eccentric wheel; 9. Inlet valve; 10. Outlet valve; 11. Piston; 12. Diaphragm; 13. Metering pump; 14. Pump body; 15. Diaphragm damage sensor; 16. Safety valve. Detailed Implementation

[0017] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings. In the embodiments of the present utility model, the different types of cross-sectional lines are not labeled according to national standards, nor do they specify material requirements for the components; they are used to distinguish the cross-sectional views of the components in the drawings.

[0018] Please see Figure 1-2A novel diaphragm-type quantitative liquid pump includes an intermediate body 1. A motor 3 is mounted on the top of the intermediate body 1. A pump body 14 is connected to the left end of the intermediate body 1. A coupling 4 is installed inside the intermediate body 1. The output shaft of the motor 3 passes through the top of the intermediate body 1 and is connected to a worm gear 5 through the coupling 4. An eccentric wheel 8 is installed inside the intermediate body 1 and below the worm gear 5. An eccentric wheel plug 7 is installed on the eccentric wheel 8. A connecting rod 6 is connected to one end of the eccentric wheel 8. A plunger 11 is connected to one end of the connecting rod 6. An outlet valve 10 is installed at the upper end of the pump body 14. An inlet valve 9 is installed at the lower end of the pump body 14. A diaphragm 12 is installed to the left of the plunger 11. An oil filling hole 2 is located in the middle of the top of the intermediate body 1. A metering pump 13 is installed on the intermediate body 1 and to one side of the outlet valve 10. A diaphragm damage sensor 15 is installed to one side of the diaphragm 12.

[0019] The diaphragm 12 is made of polytetrafluoroethylene and is circular in shape.

[0020] A safety valve 16 is installed on the intermediate body 1 and on one side of the inlet valve 9.

[0021] The number of oil filling holes 2 is set to two, and the two oil filling holes 2 are respectively located on the left and right sides of the motor 3.

[0022] Safety valve 16 is a direct-acting relief valve.

[0023] The working principle and usage process of this utility model are as follows: First, the working principle of the diaphragm liquid metering pump is based on the reciprocating motion of the diaphragm 12. When the motor 3 starts, the drive mechanism drives the eccentric wheel 8 to rotate, and the diaphragm 12 reciprocates accordingly. When the diaphragm 12 moves forward, a low-pressure state is formed in the pump chamber, the inlet valve 9 opens, and the liquid is drawn into the pump chamber. When the diaphragm 12 moves backward, a high-pressure state is formed in the pump chamber, the outlet valve 10 opens, and the liquid is discharged.

[0024] The introduction of metering pump 13 further optimizes the driving method of diaphragm 12. Through the uniform driving of hydraulic oil, the pump effectively alleviates the problem of force concentration on diaphragm 12 under direct mechanical drive, thereby extending the life of diaphragm 12 and increasing the upper limit of working pressure.

[0025] In addition, to address the potential diaphragm rupture failure of the metering pump 13, a diaphragm rupture sensor 15 is installed. Once the diaphragm ruptures, the diaphragm rupture sensor 15 will trigger an automatic interlock protection function to ensure system safety. At the same time, the metering pump 13 is also equipped with a safety valve 16, which together constitutes its comprehensive safety protection system. The opening pressure of the safety valve 16 is slightly higher than the pipeline system pressure. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0026] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A new type of diaphragm type liquid medicine quantitative pumping device, comprising a middle body (1), characterized in that: The top of the intermediate body (1) is provided with a motor (3), the left end of the intermediate body (1) is connected with a pump body (14), the inside of the intermediate body (1) is provided with a shaft coupling (4), the output shaft of the motor (3) passes through the top of the intermediate body (1) and is connected with a worm (5) through the shaft coupling (4), the inside of the intermediate body (1) and below the worm (5) is provided with an eccentric wheel (8), the eccentric wheel (8) is installed with an eccentric wheel plug (7), one end of the eccentric wheel (8) is connected with a connecting rod (6), one end of the connecting rod (6) is connected with a plunger (11), the upper end of the pump body (14) is provided with an outlet valve (10), the lower end of the pump body (14) is provided with an inlet valve (9), the left side of the plunger (11) is provided with a diaphragm (12), the middle of the top of the intermediate body (1) is provided with an oil filling hole (2), the intermediate body (1) and on one side of the outlet valve (10) is installed with a metering pump (13), one side of the diaphragm (12) is installed with a diaphragm damage sensor (15).

2. The novel diaphragm type liquid medicine dosing pump according to claim 1, characterized in that: The diaphragm (12) is made of polytetrafluoroethylene and has a circular shape.

3. The novel diaphragm type liquid medicine dosing pump according to claim 1, characterized in that: A safety valve (16) is installed on one side of the inlet valve (9) of the intermediate body (1).

4. The novel diaphragm type liquid medicine dosing pump according to claim 1, characterized in that: The number of oil filling holes (2) is two, and the two oil filling holes (2) are respectively arranged on the left and right sides of the motor (3).

5. The novel diaphragm type liquid medicine dosing pump according to claim 3, characterized in that: The safety valve (16) is a direct-acting overflow valve.

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