Special stainless steel pump for new energy lithium battery

Abstract

A stainless steel pump special for a new energy lithium battery comprises a pump body, a driving mechanism and a backflow device. The pump body comprises an intermediate cam transmission case and a membrane cavity. The intermediate cam transmission case internally comprises an input shaft, an eccentric cam, a connecting rod shaft, a linear bearing and a sealing structure. An insertion hole and a movable hole are formed in the center of the connecting rod shaft. An inner clamping plate, an outer clamping plate and a diaphragm assembly are arranged in each diaphragm cavity. And the driving mechanism comprises a driving motor and a speed reducer. The backflow device comprises a backflow pipe and a pressure protection device. Compared with the prior art, by arranging the input shaft and the connecting rod shaft and adopting the design of double bearings and whole-shaft operation, the working balance of the whole machine is ensured, the stability of equipment is improved, the service life of the equipment is prolonged, and the operation and maintenance cost of the equipment is reduced. And meanwhile, the backflow device is arranged to perform pressure relief and pressure overload protection on the equipment, so that the service life of the equipment is prolonged, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of diaphragm pumps, in particular to a stainless steel pump dedicated to new energy lithium batteries. Background Art

[0002] The electric diaphragm pump is a new type of pump that has been maturely used in petrochemical, metallurgical and other industries. Its characteristics are that the conveying medium and the transmission machinery are separated by a diaphragm, the medium will not leak outward, no water is required, and the self-priming ability is strong. In addition, the pump itself has no shaft seal, which can achieve zero leakage of the medium.

[0003] At present, the electric diaphragm pump passes the output power of the motor through the reducer. The shaft extension end of the reducer is equipped with an eccentric shaft. The eccentric shaft drives the pump shaft to perform reciprocating linear motion, and the pump shaft drives the diaphragm. When the diaphragm displaces the liquid, the liquid pressure rises sharply. This liquid pressure reacts on the diaphragm and the inner clamping plate, causing the diaphragm and the inner clamping plate to produce elastic deformation. This deformation will reduce the single displacement of the diaphragm, thereby reducing the flow value of the electric pump; the liquid pressure also has a shear destructive force on the diaphragm, shortening the working life of the diaphragm; in addition, when the outlet pipeline of the electric pump is abnormally blocked or abnormally fully closed, the liquid pressure will theoretically reach an infinite value, and the reaction torque formed on the eccentric shaft will be transmitted to the motor main shaft, which is greater than the rated torque of the motor, causing overload damage to the motor.

[0004] For example, an electric diaphragm pump disclosed in Chinese invention CN202310248925.7 includes: a pump body, in which at least one accommodating space is formed; a power unit; an air supply unit; a liquid suction component, which includes: a diaphragm, which is arranged in the accommodating space and divides the accommodating space into a medium chamber and a gas chamber, and the gas chamber is connected to the air supply unit; the diaphragm is transmission-connected to the power unit so as to move back and forth under the drive of the power unit; in this application, compressed air is filled into the gas chamber, and the air pressure of the compressed air can be determined according to the operating pressure of the diaphragm pump.

[0005] Although the bearing capacity of the diaphragm is enhanced, the required driving force is also increased, resulting in an increase in the required driving force. Long-term work is prone to failure and requires long-term grease filling. Therefore, a more effective pressure relief device and a more efficient transmission structure are needed to comprehensively improve the working efficiency and service life of the diaphragm pump. Utility Model Content

[0006] In view of this, the utility model provides a stainless steel pump dedicated to new energy lithium batteries to solve the above technical problems.

[0007] A stainless steel pump specially used for new energy lithium batteries comprises a pump body, a driving mechanism arranged on the pump body, and a reflux device arranged on the pump body. The pump body comprises an intermediate cam transmission box, two membrane chambers respectively arranged on both sides of the intermediate cam transmission box, an outlet pipe connecting the two membrane chambers, and an inlet pipe connecting the membrane chambers. The intermediate cam transmission box comprises an input shaft connected to the driving mechanism, an eccentric cam arranged on the input shaft, a connecting rod shaft sleeved on the eccentric cam, two linear bearings respectively arranged at both ends of the connecting rod shaft, and two sealing structures respectively arranged at both ends of the connecting rod shaft. The input shaft connects the driving mechanism and the eccentric cam. The eccentric cam is fixed to the end of the input shaft away from the driving mechanism, and the input shaft is fixed at the eccentric point of the eccentric cam. An insertion hole for inserting the input shaft and a movable hole for the movement of the eccentric cam are provided at the center of the connecting rod shaft. The linear bearing is a bearing sleeved on the connecting rod shaft, with its inner ring fixed on the connecting rod shaft and its outer ring fixed on the intermediate cam transmission box. The sealing structure is arranged between the connecting rod shaft and the intermediate cam transmission box, and is located on the side of the linear bearing away from the eccentric cam. Each of the membrane cavities includes an inner plywood connected to the connecting rod shaft, an outer plywood spaced apart from the inner plywood, and a diaphragm assembly located between the inner plywood and the outer plywood. The inner plywood and the outer plywood clamp the diaphragm assembly and are fixed to the connecting rod shaft by fasteners. The driving mechanism includes a driving motor and a reducer arranged on the driving motor. The reflux device includes a reflux pipe connecting the outlet pipe and the inlet pipe, and a pressure protection device arranged on the reflux pipe.

[0008] Furthermore, the pump body is made of plastic, aluminum alloy or cast iron.

[0009] Furthermore, the water outlet pipe and the water inlet pipe are respectively located on both sides of the pump body and are respectively connected to the two membrane cavities, and a sealing ball core and a valve seat are provided at the connection.

[0010] Furthermore, each of the sealing structures includes a connecting rod shaft block plate arranged on the side of the linear bearing away from the eccentric cam, a Y-shaped sealing ring arranged between the linear bearing and the connecting rod shaft block plate, and a hole elastic retaining ring arranged between the linear bearing and the Y-shaped sealing ring, and the connecting rod shaft block plate is fixed to the intermediate cam transmission box by fasteners.

[0011] Furthermore, each of the membrane cavities is divided into two chambers in the vertical direction, wherein one chamber is located close to the intermediate cam transmission box, and the other chamber is located on the other side away from the intermediate cam transmission box.

[0012] Furthermore, the return pipe is a pipe consisting of a connecting water pipe, an elbow and a joint, all of which are made of the same material as the pump body.

[0013] Furthermore, one end of the return pipe is connected to the water outlet pipe, and the other end is connected to the water inlet pipe, and the pressure protection device is arranged at the connection between the return pipe and the water outlet pipe.

[0014] Compared with the existing technology, the stainless steel pump for new energy lithium batteries provided by the utility model ensures the balance of the entire machine by providing the input shaft and connecting rod shaft, adopting a dual-bearing and whole-axis operation design. The linear bearing is provided to reduce the friction resistance during movement, so that the driving force required by the device is reduced, and the speed is increased under the same power, thereby improving the stability of the device and helping to increase the service life of the device. In addition, it solves the problem of equipment maintenance personnel having to frequently add grease, reducing equipment operation and maintenance costs. At the same time, the backflow device is provided to relieve pressure and protect the device from pressure overload, which helps to increase the service life of the device and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a stainless steel pump dedicated to new energy lithium batteries provided by the utility model.

[0016] Figure 2 for Figure 1 Schematic diagram of the exploded structure of the pump body of the new energy lithium battery special stainless steel pump.

[0017] Figure 3 for Figure 1 Side view of a stainless steel pump specifically designed for new energy lithium batteries.

[0018] Figure 4 for Figure 3 Cross-sectional view of the stainless steel pump for new energy lithium batteries on section AA. DETAILED DESCRIPTION

[0019] The following is a further detailed description of specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the scope of protection of the present invention.

[0020] like Figures 1 to 4, which is a schematic diagram of the structure of the stainless steel pump for new energy lithium batteries provided by the present invention. The stainless steel pump for new energy lithium batteries comprises a pump body 10, a drive mechanism 20 disposed on the pump body 10, and a reflux device 30 disposed on the pump body 10. It is conceivable that the stainless steel pump for new energy lithium batteries also includes other functional modules such as a diaphragm, a one-way valve, etc., which are well known to those skilled in the art and will not be detailed here.

[0021] The pump body 10 is made of stable materials such as plastic, aluminum alloy, cast iron, etc., and includes an intermediate cam transmission box 11, two membrane cavities 12 respectively arranged on both sides of the intermediate cam transmission box 11, an outlet pipe 13 connecting the two membrane cavities 12, and a water inlet pipe 14 connecting the membrane cavity 12.

[0022] The intermediate cam transmission box 11 includes an input shaft 111 connected to the driving mechanism 20, an eccentric cam 112 arranged on the input shaft 111, a connecting rod shaft 113 sleeved on the eccentric cam 112, two linear bearings 114 respectively arranged at both ends of the connecting rod shaft 113, and two sealing structures 115 respectively arranged at both ends of the connecting rod shaft 113.

[0023] The input shaft 111 connects the drive mechanism 20 and the eccentric cam 112 to perform a transmission function, driving the eccentric cam 112 to rotate along the axis of the input shaft 111. The eccentric cam 112 is fixed to the end of the input shaft 111 away from the drive mechanism 20, and the input shaft 111 is fixed at the eccentric position of the eccentric cam 112, so that when the input shaft 111 rotates along the axis, the center of the eccentric cam 112 performs a circular motion outside the rotation axis.

[0024] The connecting rod shaft 113 is a cylindrical structure with an insertion hole 1131 at its center for the input shaft 111 to be inserted, and a movable hole 1132 for the eccentric cam 112 to move. It is conceivable that when the input shaft 111 drives the eccentric cam 112 to rotate, the eccentric cam 112 will drive the connecting rod shaft 113 to reciprocate axially. At the same time, the inclusion of the movable hole 1132 prevents radial movement of the connecting rod shaft 113. Furthermore, the insertion hole 1131 is sized to fit snugly with the eccentric cam 112, ensuring that the reciprocating motion of the connecting rod shaft 113 does not collide with the eccentric cam 112 and cause wear to the equipment.

[0025] The linear bearing 114 is a bearing sleeved around the connecting rod shaft 113. Its inner ring is fixed to the connecting rod shaft 113, and its outer ring is fixed to the intermediate cam transmission housing 11. This allows the connecting rod shaft 113 to move axially when inserted into the diaphragm assembly 123. Metal linear bearings are a low-cost linear motion system designed for use with cylindrical shafts with unlimited travel. They are currently available and will only be briefly described here.

[0026] The sealing structure 115 is disposed between the connecting rod shaft 113 and the intermediate cam transmission box 11 and is located on the side of the linear bearing 114 away from the eccentric cam 112 to seal the membrane cavity 12. Each sealing structure 115 includes a connecting rod shaft stopper 1151 disposed on the side of the linear bearing 114 away from the eccentric cam 112, a Y-shaped sealing ring 1152 disposed between the linear bearing 114 and the connecting rod shaft stopper 1151, and a hole elastic circlip 1153 disposed between the linear bearing 114 and the Y-shaped sealing ring 1152. The connecting rod shaft stopper 1151 is fixed to the intermediate cam transmission box 11 by fasteners to abut the connecting rod shaft stopper 1151 and the Y-shaped sealing ring 1152 to prevent them from leaving the working position. The Y-shaped sealing ring 1152 is used to seal between the intermediate cam transmission box 11 and the membrane cavity 12. The hole elastic retaining ring 1153 is used to press against the linear bearing 114 to prevent it from escaping from the working station.

[0027] Each of the membrane cavities 12 is divided into two chambers in the vertical direction, one of which is located close to the intermediate cam transmission box 11, and the other is located on the other side away from the intermediate cam transmission box 11. Each of the membrane cavities 12 includes an inner clamping plate 121 connected to the connecting rod shaft 113, an outer clamping plate 122 spaced apart from the inner clamping plate 121, and a diaphragm assembly 123 located between the inner clamping plate 121 and the outer clamping plate 122. The inner clamping plate 121 and the outer clamping plate 122 clamp the diaphragm assembly 123 and are fixed to the connecting rod shaft 111 by fasteners, so that the diaphragm volume deformation is achieved through the reciprocating operation of the transmission mechanism, thereby achieving the purpose of medium suction and discharge. The diaphragm assembly 123 includes a polytetrafluoroethylene diaphragm, a back membrane, a main membrane and other structures, and the inner clamping plate 121 and the outer clamping plate 122 are common technologies widely used in the field of diaphragm pumps, so only a brief description of its structure and function is given here.

[0028] The outlet pipe 13 and the inlet pipe 14 are respectively located on both sides of the pump body 10, specifically on the upper and lower sides, and are respectively connected to the two membrane cavities 12, and a sealing ball core and a valve seat are provided at the connection to form a one-way valve. The diaphragm is deformed in volume by the movable rod to realize medium suction and discharge. The one-way valves of the outlet pipe 13 and the inlet pipe 14 are opened and closed, so that each outer diaphragm chamber is alternately filled and discharged. The above structures and technologies are common technologies widely used in the field of diaphragm pumps, so only a brief description of their structure and function is given here.

[0029] The driving mechanism 20 includes a driving motor 21 and a reducer 22 provided on the driving motor 21. It can also be equipped with an advanced control system that can achieve automatic control and adjustment. Through the cooperation of sensors and controllers, the operating status of the pump can be monitored and adjusted in real time to ensure stable material delivery.

[0030] The drive motor 21 is an electric motor that provides driving force. The reducer 22 is disposed between the drive motor 21 and the pump body 10 to adjust the rotational speed and thereby control the movement rate of the input shaft 111. The drive motor 21 and reducer 22 are both common technologies in the field of diaphragm pump technology and should be well known to those skilled in the art. Therefore, only a brief description is provided here.

[0031] The reflux device 30 includes a reflux pipe 31 connecting the water outlet pipe 13 and the water inlet pipe 14 , and a pressure protection device 32 provided on the reflux pipe 31 .

[0032] The return pipe 31 is a pipe consisting of a connecting water pipe, an elbow, and a joint, all made of the same material as the pump body 10. One end of the return pipe 31 is connected to the outlet pipe 13, and the other end is connected to the inlet pipe 14. This allows for backflow relief when the pressure inside the valve is too high, providing overpressure protection for the equipment and protecting the internal transmission mechanism.

[0033] The pressure protection device 32 is disposed at the junction of the return pipe 21 and the outlet pipe 13. The pressure protection device 32 is controlled by a pressure relief valve. When the pressure at the outlet of the valve exceeds a predetermined value, the valve automatically opens, allowing some liquid to flow back through the return pipe 21 to the inlet pipe 14, thereby reducing the pressure. The pressure relief valve is a prior art feature and should be well known to those skilled in the art, so its structure will not be described in detail here.

[0034] Compared with the prior art, the stainless steel pump for new energy lithium batteries provided by the present invention adopts a dual-bearing and whole-axis operation design by providing the input shaft 111 and the connecting rod shaft 113, thereby ensuring the balance of the entire machine operation. The linear bearing 114 is provided to reduce the friction resistance during movement, so that the driving force required by the device is smaller and the speed is increased under the same power, thereby improving the stability of the device and helping to increase the service life of the device. In addition, it solves the problem of frequent grease addition required by equipment maintenance personnel, thereby reducing equipment operation and maintenance costs. At the same time, the backflow device 30 is provided to relieve pressure and protect the device from pressure overload, which helps to increase the service life of the device and reduce production costs.

[0035] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements or improvements within the spirit of the present invention are included in the scope of the claims of the present invention.

Claims

1. A stainless steel pump for new energy lithium batteries, characterized by: The stainless steel pump dedicated to new energy lithium batteries includes a pump body, a driving mechanism arranged on the pump body, and a reflux device arranged on the pump body. The pump body includes an intermediate cam transmission box, two membrane cavities respectively arranged on both sides of the intermediate cam transmission box, an outlet pipe connecting the two membrane cavities, and a water inlet pipe connecting the membrane cavities. The intermediate cam transmission box includes an input shaft connected to the driving mechanism, an eccentric cam arranged on the input shaft, a connecting rod shaft sleeved on the eccentric cam, two linear bearings respectively arranged at both ends of the connecting rod shaft, and two sealing structures respectively arranged at both ends of the connecting rod shaft. The input shaft connects the driving mechanism and the eccentric cam, the eccentric cam is fixed to the end of the input shaft away from the driving mechanism, and the input shaft is fixed at the eccentricity of the eccentric cam. A supply is provided at the center of the connecting rod shaft. The input shaft is inserted into the insertion hole, and the eccentric cam is provided with a movable hole for the movement of the linear bearing. The linear bearing is a bearing sleeved on the connecting rod shaft, the inner ring of which is fixed on the connecting rod shaft, and the outer ring is fixed on the intermediate cam transmission box. The sealing structure is arranged between the connecting rod shaft and the intermediate cam transmission box, and is located on the side of the linear bearing away from the eccentric cam. Each of the membrane cavities includes an inner splint connected to the connecting rod shaft, an outer splint spaced apart from the inner splint, and a diaphragm assembly located between the inner splint and the outer splint. The inner splint and the outer splint clamp the diaphragm assembly and are fixed to the connecting rod shaft by fasteners. The driving mechanism includes a driving motor and a reducer arranged on the driving motor. The reflux device includes a reflux pipe connecting the outlet pipe and the water inlet pipe, and a pressure protection device arranged on the reflux pipe.

2. The stainless steel pump for new energy lithium battery according to claim 1, characterized in that: The pump body is made of plastic, aluminum alloy or cast iron.

3. The stainless steel pump for new energy lithium battery according to claim 1, characterized in that: The water outlet pipe and the water inlet pipe are respectively located on both sides of the pump body and are respectively connected to the two membrane cavities, and a sealing ball core and a valve seat are provided at the connection.

4. The stainless steel pump for new energy lithium battery according to claim 1, characterized in that: Each of the sealing structures includes a connecting rod shaft stopper arranged on the side of the linear bearing away from the eccentric cam, a Y-shaped sealing ring arranged between the linear bearing and the connecting rod shaft stopper, and a hole elastic retaining ring arranged between the linear bearing and the Y-shaped sealing ring. The connecting rod shaft stopper is fixed to the intermediate cam transmission box by fasteners.

5. The stainless steel pump for new energy lithium battery according to claim 1, characterized in that: Each of the membrane chambers is divided into two chambers in a vertical direction, wherein one chamber is located close to the intermediate cam transmission box, and the other chamber is located on the other side away from the intermediate cam transmission box.

6. The stainless steel pump for new energy lithium battery according to claim 1, characterized in that: The return pipe is a pipe consisting of a connecting water pipe, an elbow and a joint, all of which are made of the same material as the pump body.

7. The stainless steel pump for new energy lithium battery according to claim 1, characterized in that: One end of the return pipe is connected to the water outlet pipe, and the other end is connected to the water inlet pipe. The pressure protection device is arranged at the connection between the return pipe and the water outlet pipe.

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