Pneumatic lubricating grease injection gun device

Abstract

The invention belongs to the technical field of lubricating grease injection, and particularly relates to a pneumatic lubricating grease injection gun device. The invention aims to solve the problem of unsmooth conveying caused by viscosity of lubricating grease. The device comprises a grease barrel, and a penetrating shaft type motor, a hydraulic pump and an electromagnetic valve set are installed on the grease barrel. A heat preservation partition plate is arranged in the grease barrel to divide the grease barrel into a heating cavity and a liquid storage cavity; a backflow stirring mechanism for stirring the lubricating grease in the heating cavity under the driving of a penetrating shaft type motor is arranged in the grease barrel; and a transmission mechanism and a drainage stirring mechanism are arranged below the heat preservation partition plate, and the transmission mechanism drives the drainage stirring mechanism to rotate and stir the lubricating grease in the liquid storage cavity around a shaft under transmission of the backflow stirring mechanism. According to the invention, a dual-cavity partition, heating, stirring and backflow synergistic mode is adopted, so that the lubricating grease is always in a flowing state, and the problem of unsmooth conveying caused by solidification of low-temperature / high-viscosity grease is solved.

Description

Technical Field

[0001] This invention relates to the field of grease injection technology, and more specifically to a pneumatic grease injection gun device. Background Technology

[0002] Grease is a semi-solid paste-like substance (not the liquid state of lubricating oil). It cannot flow naturally by gravity or pumping like a liquid. Moreover, the lubrication points of mechanical equipment are mostly closed / hidden structures, requiring external force and precise tools to achieve effective lubrication. Therefore, grease must be injected using an injection gun (such as a pneumatic or manual grease gun).

[0003] In the prior art, for example, CN211902321U discloses a pneumatic grease dispensing device, including: a grease moving trolley, wheels, an oil reservoir mounting base, a trolley baffle, an oil reservoir body, an oil reservoir cover, an oil reservoir flip cover, a handle mounting base, a flip cover handle, a lubricating oil pump mounting base, a lubricating oil pump, an oil pump suction pipe, a grease output pipe, an oil pipe connector, and an air source inlet. The wheels are fixedly installed at the lower corner of the grease moving trolley. The oil reservoir mounting base is fixedly installed at the upper middle of the grease moving trolley. The trolley baffle is fixedly installed on the upper right side of the grease moving trolley, with evenly distributed strip-shaped through holes on the front of the baffle, and symmetrically installed trolley push handles on the upper right side of the baffle. The oil reservoir body is fixedly installed on the upper side of the oil reservoir mounting base.

[0004] Existing pneumatic grease filling devices have the following problems:

[0005] 1. The oil reservoir has a single-chamber structure, which only realizes the basic functions of storage and extraction. It does not take into account the characteristics of grease (especially in low temperature environment) that is prone to solidification and agglomeration. This can easily lead to poor grease extraction by the oil pump, pipeline blockage, and grease residue at the bottom of the oil reservoir. In addition, there is the problem of uneven grease mixing after grease replenishment.

[0006] 2. The oil reservoir lacks pressure detection and reflux mechanism. If the pipeline is blocked or the viscosity of the grease increases suddenly, it can easily lead to overload and damage to the oil pump. Furthermore, there is no grease reflux treatment solution, and direct discharge will result in waste. Summary of the Invention

[0007] The purpose of this invention is to provide a pneumatic grease injection gun device, which aims to solve the problem of poor delivery caused by the easy solidification of grease in the prior art.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A pneumatic grease injection gun device includes a grease tank, on which a through-shaft motor, a hydraulic pump, and a solenoid valve assembly are mounted; the grease tank has an internal heat-insulating partition that divides its internal space into a heating chamber and a liquid storage chamber distributed vertically; the grease tank has a built-in reflux stirring mechanism that stirs the grease in the heating chamber under the drive of the through-shaft motor.

[0010] Below the insulation partition is a transmission mechanism and a flow-guiding and stirring mechanism. The transmission mechanism drives the flow-guiding and stirring mechanism to rotate and stir the grease in the storage chamber around the axis under the transmission of the flow-guiding and stirring mechanism.

[0011] The hydraulic pump, driven synchronously by the through-shaft motor, draws grease from the heating chamber to the solenoid valve assembly via a suction pipe. The priming and agitating mechanism draws grease from the reservoir into the heating chamber. The solenoid valve assembly selectively delivers grease through a discharge hose to an oil gun or through a return pipe to the reflux agitating mechanism, which then delivers it to the reservoir.

[0012] Preferably, the reflux agitation mechanism includes a first shaft tube, which is rotatably connected to the grease tank. The lower end of the first shaft tube passes through the heat insulation partition and extends to the liquid storage chamber. Several blades are fixed on the part of the first shaft tube located in the heating chamber. The upper end of the first shaft tube extends to the outside of the grease tank and is rotatably connected to the oil return pipe through a rotary joint. A first power gear is fixed on the part of the first shaft tube located outside the grease tank. A second power gear that meshes with the first power gear is fixed on the power shaft of the hydraulic pump.

[0013] Preferably, the transmission mechanism includes a sleeve, which is fixed to the bottom surface of the insulation partition. A turntable rotatably connected to the insulation partition is provided at the top of the sleeve, and a cover rotatably connected to the bottom of the sleeve is provided. A first rotating arm is fixed to the bottom of the turntable, and a second rotating arm is fixed to the upper part of the cover. Both the first and second rotating arms are fixedly connected to the first shaft tube, and a toothed ring is fixed on the inner circumference of the sleeve.

[0014] Preferably, the flow-guiding and stirring mechanism includes a second shaft tube that passes through the turntable and the cover, and is rotatably connected to the first rotating arm and the second rotating arm. A third power gear is fixed at the part of the second shaft tube located inside the sleeve. The third power gear meshes with a gear ring. A one-way valve is provided on the second shaft tube to allow the lubricating grease in the storage chamber to flow unidirectionally to the heating chamber. A U-shaped stirring frame is fixed at the part of the second shaft tube located in the storage chamber.

[0015] Preferably, a horizontally arranged clapper is fixed between the top of the U-shaped stirring rack and the second shaft tube, and the lower end of the first shaft tube is close to the rotating shearing surface of the clapper.

[0016] Preferably, the U-shaped stirring rack has rubber scrapers fixed on both sides that can contact the inner wall of the grease tank when rotating.

[0017] Preferably, the lower end of the second shaft tube is located near the bottom of the liquid storage chamber and is fixed with a filter screen.

[0018] Preferably, the solenoid valve assembly includes a valve body and an actuator for switching the working state of the valve core within the valve body;

[0019] The valve body includes an oil inlet, a first oil outlet, and a second oil outlet. The oil inlet is connected to the oil suction pipe, the first oil outlet is connected to the oil return pipe, and the second oil outlet is connected to the discharge hose.

[0020] Preferably, the second oil outlet is equipped with a pressure gauge, which is coupled to the actuator and configured such that when the pressure value measured by the pressure gauge is greater than a predetermined value, the valve body closes the second oil outlet and opens the first oil outlet.

[0021] Preferably, the heating chamber is provided with an electric heating layer; and / or, the grease container is placed on a trolley.

[0022] The advantages of this invention are:

[0023] The present invention adopts a dual-cavity partitioning and heating and stirring synergistic method to solve the problem of solidification and agglomeration of low temperature / high viscosity grease. Through the heat insulation partition, electric heating layer and reflux stirring mechanism, an integrated system of heating, stirring, heat preservation and reflux is constructed to ensure that the grease is always in a flowing state, and solves the problem of poor delivery caused by the viscosity of grease in the prior art.

[0024] This invention achieves stirring of the liquid storage chamber and automatic grease replenishment to the heating chamber through the transmission cooperation of the diversion and stirring mechanism, avoiding residue and manual intervention. The transmission mechanism links the diversion and stirring mechanism to simultaneously realize three major functions: stirring of the liquid storage chamber, automatic grease replenishment, and cleaning of residue on the inner wall.

[0025] This invention employs electromagnetic valve group pressure feedback and reflux shear dispersion to solve the technical problems of overpressure damage to equipment and secondary utilization of refluxed viscous grease. By using pressure adaptive reflux and viscous grease dispersion, it improves the safety of transportation and the efficiency of resource utilization, realizing a closed loop of real-time pressure detection, automatic overpressure reflux, and refluxed grease shear dispersion, thus taking into account both equipment safety and efficient resource utilization. Attached Figure Description

[0026] Figure 1This is a schematic diagram of the overall structure of a pneumatic grease injection gun device according to an embodiment of the present invention;

[0027] Figure 2 This is a front view schematic diagram of a pneumatic grease injection gun device according to an embodiment of the present invention;

[0028] Figure 3 This is a schematic cross-sectional view of a pneumatic grease injection gun device according to an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of a reflux stirring mechanism in an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of a half-section structure of a transmission mechanism in an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of a flow-guiding and stirring mechanism in an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of a solenoid valve assembly structure in an embodiment of the present invention;

[0033] In the diagram: 1. Trolley; 2. Grease tank; 3. Mounting bracket; 4. Through-shaft motor; 5. Hydraulic pump; 51. Second power gear; 52. Suction pipe; 6. Solenoid valve assembly; 61. Valve body; 62. Actuator; 63. Oil inlet; 64. First oil outlet; 65. Second oil outlet; 66. Pressure gauge; 67. Return pipe; 7. Discharge hose; 8. Oil injection gun; 9. Recirculation agitation mechanism; 91. First shaft tube; 92. Blade; 93. First power gear; 94. Rotary joint; 10. Transmission mechanism; 101. Sleeve; 102. Turntable; 103. Cover; 104. First rotating arm; 105. Second rotating arm; 106. Gear ring; 11. Drainage and stirring mechanism; 111. Second shaft tube; 112. U-shaped stirring frame; 113. Rubber scraper; 114. Filter screen; 115. Third power gear; 116. One-way valve; 117. Pattering plate; 12. Thermal insulation partition; 13. Liquid storage chamber; 14. Heating chamber. Detailed Implementation

[0034] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the invention and are not intended to limit the scope of protection of the invention. Those skilled in the art can make adjustments as needed to adapt to specific applications.

[0035] It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "left," and "right," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. The word "comprising" does not exclude the presence of components not inherent to the device in the claims. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components.

[0037] Please see Figure 1 and Figure 2 This embodiment describes the main structure of a pneumatic grease injection gun device. The pneumatic grease injection gun device provided in this embodiment includes a trolley 1 and a grease tank 2 placed on the trolley 1. A through-shaft motor 4, a hydraulic pump 5, and a solenoid valve assembly 6 are fixed to the grease tank 2 via a mounting bracket 3. An insulation partition 12 is fixed inside the grease tank 2, dividing the internal space of the grease tank 2 into a vertically distributed heating chamber 14 and a liquid storage chamber 13. The grease tank 2 is divided into a vertically distributed heating chamber 14 (for immediate grease delivery) and a liquid storage chamber 13 (for grease storage) by the insulation partition 12. The insulation partition reduces heat diffusion from the heating chamber 14 to the liquid storage chamber 13, thus reducing energy consumption. The grease tank 2 is equipped with a reflux stirring mechanism 9 that stirs the grease in the heating chamber 14 under the drive of the through-shaft motor 4. The bottom of the heat insulation partition 12 is equipped with a transmission mechanism 10 and a diversion stirring mechanism 11. The transmission mechanism 10 drives the diversion stirring mechanism 11 to rotate and stir the grease in the liquid storage chamber 13 around the shaft under the transmission of the reflux stirring mechanism 9.

[0038] Furthermore, under the synchronous drive of the through-shaft motor 4, the hydraulic pump 5 extracts grease from the heating chamber 14 through the suction pipe 52. The diversion and stirring mechanism 11 can draw grease from the reservoir 13 into the heating chamber 14 as a supplement. The solenoid valve group 6 delivers the grease extracted by the hydraulic pump 5 to the oil gun 8 through the discharge hose 7 and can detect the delivery pressure. When the detected delivery pressure exceeds the set value, it can be delivered to the return stirring mechanism 9 through the return oil pipe 67 and returned to the reservoir 13 by the return stirring mechanism 9. The relative rotation of the diversion and stirring mechanism 11 and the return stirring mechanism 9 can shear and beat the grease with higher viscosity that is returned.

[0039] Please see Figure 3 and Figure 4 The reflux stirring mechanism 9 includes a first shaft tube 91, which is rotatably connected to the grease tank 2. The lower end of the first shaft tube 91 passes through the heat insulation partition 12 and extends to the liquid storage chamber 13. Several blades 92 are fixed at the location of the first shaft tube 91 in the heating chamber 14. The through-shaft motor 4 drives the first shaft tube 91 to rotate. The first shaft tube 91 drives the blades 92 in the heating chamber 14 to rotate, stirring the heated grease, avoiding local overheating or agglomeration, and ensuring uniform flow of the grease. The upper end of the grease tank 2 extends outside the grease tank 2 and is rotatably connected to the return oil pipe 67 through the rotary joint 94 to ensure that the oil circuit is sealed when the first shaft tube 91 rotates. The first shaft tube 91 is fixed with a first power gear 93 at the location outside the grease tank 2. The power shaft of the hydraulic pump 5 is fixed with a second power gear 51 that meshes with the first power gear 93. When the through-shaft motor 4 drives the first shaft tube 91 to rotate, the first power gear 93 drives the second power gear 51 to rotate through meshing, thereby driving the hydraulic pump 5 to work synchronously, realizing the synchronous operation of "hydraulic pump grease extraction" and "recirculation stirring mechanism 9 stirring heating chamber", avoiding the grease in the heating chamber from agglomerating due to asynchronous power.

[0040] Please see Figure 3 and Figure 5 The transmission mechanism 10 includes a sleeve 101, which is fixed to the bottom surface of the insulation partition 12. A turntable 102 is provided on the top of the sleeve 101 and is rotatably connected to the insulation partition 12. A cover 103 is rotatably connected to the outer side of the bottom of the sleeve 101. A first rotating arm 104 is fixed on the bottom surface of the turntable 102, and a second rotating arm 105 is fixed on the upper surface of the cover 103. Both the first rotating arm 104 and the second rotating arm 105 are fixed to the outside of the first shaft tube 91. A toothed ring 106 is fixed on the inner circumference of the sleeve 101.

[0041] Please see Figure 3 and Figure 6The diversion and agitation mechanism 11 includes a second shaft tube 111, which passes through the turntable 102 and the cover 103, and is rotatably connected to the first rotating arm 104 and the second rotating arm 105. A third power gear 115 is fixed at the part of the second shaft tube 111 located inside the sleeve 101. The third power gear 115 meshes with the gear ring 106. When the first shaft tube 91 of the reflux agitation mechanism 9 rotates, it drives the first rotating arm 104 and the second rotating arm 105 fixed on its outer side to rotate synchronously, thereby driving the second shaft tube 111 of the diversion and agitation mechanism 11 to move circumferentially around the first shaft tube 91. At the same time, the third power gear 115 on the second shaft tube 111 meshes with the gear ring 106 on the inner wall of the sleeve 101, so that the second shaft tube 111 rotates while moving circumferentially. A one-way valve 116 is provided on the second shaft tube 111 to allow the grease in the storage chamber 13 to flow unidirectionally to the heating chamber 14. A U-shaped stirring rack 112 is fixed at the bottom of the second shaft tube 111. When the U-shaped stirring rack 112 rotates, it stirs the grease in the storage chamber 13 throughout the entire process. A horizontally arranged patter 117 is fixed between the top of the U-shaped stirring rack 112 and the second shaft tube 111. The high-viscosity grease that flows back is transported to the storage chamber 13 through the first shaft tube 91. At the same time, the patter 117 near the lower end of the first shaft tube 91 rotates and shears. The patter 117 rotates with the second shaft tube 111 and performs "shear-type patting" on the viscous grease clumps falling from the first shaft tube 91, dispersing them into uniform grease, which is then reintegrated into the storage chamber 13 to participate in the circulation, thus preventing the clumps from clogging the pipeline again. Furthermore, the clapper 117 has a certain width and a relatively fast rotation speed. It uses the kinetic energy of its high-speed rotation to "shear and beat" the lubricating grease clump, and then uses its centrifugal force to throw the lubricating grease clump out in all directions, and then collide with the cylinder wall to disperse the lubricating grease clump through the impact.

[0042] In a preferred embodiment, rubber scrapers 113 are fixed on both sides of the U-shaped stirring rack 112, which can contact the inner wall of the grease tank 2 when rotating. The rubber scrapers 113 on both sides of the U-shaped stirring rack 112 rotate in contact with the inner wall of the grease tank to scrape off the attached residual grease and avoid waste.

[0043] In a preferred embodiment, the lower port of the second shaft tube 111 is near the bottom of the reservoir 13 and is fixed with a filter screen 114 for filtering impurities. The grease in the heating chamber 14 is drawn by the hydraulic pump 5 and can be circulated into the reservoir 13 through the first oil outlet 64 or delivered to the grease gun 8 through the discharge hose 7 for grease injection. The negative pressure environment in the heating chamber 14 allows the grease mixed in the reservoir 13 to enter the heating chamber 14 through the one-way valve 116 as a supplement after being drawn by the second shaft tube 111, thus realizing automatic replenishment of the grease in the heating chamber without manual intervention.

[0044] Please see Figure 1 and Figure 7The solenoid valve assembly 6 includes a valve body 61 and an actuator 62 for switching the working state of the valve core inside the valve body 61. More specifically, the valve body 61 is a three-way valve, with the three ports being an oil inlet 63, a first oil outlet 64, and a second oil outlet 65. The oil inlet 63 is connected to the bottom of the heating chamber 14 through the oil suction pipe 52. The first oil outlet 64 is connected to the return oil pipe 67, and the second oil outlet 65 is connected to the discharge hose 7. A pressure gauge 66 is installed on the second oil outlet 65. The actuator 62 can receive the electrical signal from the pressure gauge 66 to control the flow direction of the liquid inside the valve body 61. When the pressure detected by the pressure gauge 66 exceeds the set value, the actuator 62 sends an electrical signal, and the actuator 62 switches the valve core inside the valve body 61, closing the second oil outlet 65 and opening the first oil outlet 64, so that the grease is switched from the second oil outlet 65 (the direction of delivery of the oil gun 8) to the first oil outlet 64, and is delivered to the return stirring mechanism 9 through the return oil pipe 67.

[0045] In a preferred embodiment, the portion of the grease container 2 located within the heating chamber 14 is provided with an electric heating layer to directly heat the grease within the chamber and reduce its viscosity.

[0046] The working principle and usage process of this invention are as follows: The heat insulation partition 12 divides the space inside the grease tank 2 into an upper and lower heating chamber 14 and a liquid storage chamber 13. Both the heating chamber 14 and the liquid storage chamber 13 store grease. During operation, the through-shaft motor 4 drives the first shaft tube 91 to rotate, and the blade 92 stirs the grease in the heating chamber 14. The engagement of the first power gear 93 and the second power gear 51 drives the hydraulic pump 5 to work synchronously. The grease in the heating chamber 14 is drawn to the solenoid valve group 6 through the oil suction pipe 52 and delivered to the oil injection gun 8 through the discharge hose 7 for oil injection. The pressure gauge 66 detects the pressure during oil injection in real time.

[0047] When the viscosity of the delivered grease is high, causing the injection pressure to increase and exceed the set value, the pressure gauge 66 feeds back to the actuator 62 in the form of an electrical signal, thereby switching the working state of the valve core in the valve body 61, so that the grease is delivered to the return oil pipe 67 through the first oil outlet 64, and delivered to the first shaft tube 91 through the rotary joint 94, and then flows back to the reservoir 13 through the first shaft tube 91.

[0048] In the above process, the first shaft tube 91 can rotate by the first rotating arm 104 and the second rotating arm 105, which can cause the second shaft tube 111 to rotate circumferentially around the first shaft tube 91. The second shaft tube 111 is driven to rotate circumferentially around the first shaft tube 91 by the meshing of the third power gear 115 and the gear ring 106 outside the second shaft tube 111. At the same time, it can rotate on its own axis. Then, the U-shaped stirring frame 112 stirs the grease in the liquid storage chamber 13. Since the lower end of the first shaft tube 91 is located at a high position in the liquid storage chamber 13, slightly higher than the plate 117, it can mix with the upper layer of grease with lower viscosity from top to bottom. The lower end of the first shaft tube 91 is close to the rotating shearing surface of the plate 117. The shearing action of the plate 117 when it rotates can beat the grease falling from the lower end of the first shaft tube 91 to better disperse the viscous grease clumps.

[0049] The lubricating grease mixed in the reservoir 13 is drawn into the heating chamber 14 through the one-way valve 116 by the second shaft tube 111 as a supplement. The electric heating layer in the heating chamber 14 heats the lubricating grease to further prevent the grease from agglomerating. The lubricating grease that has been fully dissolved after heating is drawn into the reservoir 13 by the hydraulic pump 5 and circulated into the reservoir 13 through the first oil outlet 64. After the set time is reached, the actuator 62 automatically switches the liquid flow direction in the valve body 61 to allow the grease gun 8 to be used normally.

[0050] The above description describes the preferred embodiments of the present invention and the technical principles applied thereto. For those skilled in the art, any obvious changes such as equivalent transformations or simple substitutions based on the technical solutions of the present invention, without departing from the spirit and scope of the present invention, shall fall within the protection scope of the present invention.

Claims

1. A pneumatic grease injection gun device, characterized in that, The device includes a grease tank (2), on which a through-shaft motor (4), a hydraulic pump (5), and a solenoid valve group (6) are installed; the grease tank (2) has a built-in heat-insulating partition (12) that divides its internal space into a heating chamber (14) and a liquid storage chamber (13) distributed vertically; the grease tank (2) has a built-in reflux stirring mechanism (9) that stirs the grease in the heating chamber (14) under the drive of the through-shaft motor (4); Below the heat insulation partition (12) are a transmission mechanism (10) and a flow-guiding and stirring mechanism (11). The transmission mechanism (10) drives the flow-guiding and stirring mechanism (11) to rotate and stir the grease in the liquid storage chamber (13) around the axis under the transmission of the reflux stirring mechanism (9). The hydraulic pump (5) can draw grease from the heating chamber (14) to the solenoid valve assembly (6) through an oil suction pipe (52) under the synchronous drive of the through-shaft motor (4). The dredging and stirring mechanism (11) can draw grease from the reservoir (13) to the heating chamber (14). The solenoid valve assembly (6) can selectively deliver grease to an oil gun (8) through a discharge hose (7) or to the return oil pipe (67) through a return oil pipe (9), and then deliver it to the reservoir (13) through the return oil stirring mechanism (9).

2. The pneumatic grease injection gun device as described in claim 1, characterized in that, The reflux stirring mechanism (9) includes a first shaft tube (91), which is rotatably connected to the grease tank (2). The lower end of the first shaft tube (91) passes through the heat insulation partition (12) and extends to the liquid storage chamber (13). Several blades (92) are fixed on the part of the first shaft tube (91) located in the heating chamber (14). The upper end of the first shaft tube (91) extends to the outside of the grease tank (2) and is rotatably connected to the return oil pipe (67) through a rotary joint (94). A first power gear (93) is fixed on the part of the first shaft tube (91) located outside the grease tank (2). A second power gear (51) that meshes with the first power gear (93) is fixed on the power shaft of the hydraulic pump (5).

3. The pneumatic grease injection gun device as described in claim 2, characterized in that, The transmission mechanism (10) includes a sleeve (101), which is fixed to the bottom surface of the insulation partition (12). The top of the sleeve (101) is provided with a turntable (102) that is rotatably connected to the insulation partition (12). The bottom of the sleeve (101) is provided with a cover (103) that is rotatably connected to it. The bottom of the turntable (102) is fixed with a first rotating arm (104), and the upper part of the cover (103) is fixed with a second rotating arm (105). The first rotating arm (104) and the second rotating arm (105) are both fixedly connected to the first shaft tube (91). A toothed ring (106) is fixed on the inner circumference of the sleeve (101).

4. The pneumatic grease injection gun device as described in claim 3, characterized in that, The flow-guiding and stirring mechanism (11) includes a second shaft tube (111), which passes through the turntable (102) and the cover (103) and is rotatably connected to the first rotating arm (104) and the second rotating arm (105). A third power gear (115) is fixed at the part of the second shaft tube (111) located inside the sleeve (101). The third power gear (115) meshes with the gear ring (106). A one-way valve (116) is provided on the second shaft tube (111) to allow the grease in the liquid storage chamber (13) to flow unidirectionally to the heating chamber (14). A U-shaped stirring rack (112) is fixed at the part of the second shaft tube (111) located in the liquid storage chamber (13).

5. The pneumatic grease injection gun device as described in claim 4, characterized in that, A horizontally arranged clapper (117) is fixed between the top of the U-shaped stirring rack (112) and the second shaft tube (111), and the lower end of the first shaft tube (91) is close to the rotating shearing surface of the clapper (117).

6. The pneumatic grease injection gun device as described in claim 4, characterized in that, The U-shaped stirring rack (112) has rubber scrapers (113) fixed on both sides, which can contact the inner wall of the grease tank (2) when rotating.

7. The pneumatic grease injection gun device as described in claim 4, characterized in that, The lower port of the second shaft tube (111) is close to the bottom of the liquid storage chamber (13) and is fixed with a filter screen (114).

8. The pneumatic grease injection gun device as described in claim 1, characterized in that, The solenoid valve assembly (6) includes a valve body (61) and an actuator (62) for switching the working state of the valve core inside the valve body (61); The valve body (61) includes an oil inlet (63), a first oil outlet (64) and a second oil outlet (65). The oil inlet (63) is connected to the oil suction pipe (52), the first oil outlet (64) is connected to the oil return pipe (67), and the second oil outlet (65) is connected to the discharge hose (7).

9. The pneumatic grease injection gun device as described in claim 8, characterized in that, A pressure gauge (66) is provided on the second oil outlet (65). The pressure gauge (66) is coupled to the actuator (62) and is configured such that when the pressure value measured by the pressure gauge (66) is greater than a predetermined value, the valve body (61) closes the second oil outlet (65) and opens the first oil outlet (64).

10. The pneumatic grease injection gun device as described in claim 1, characterized in that, The heating chamber (14) is provided with an electric heating layer; and / or, the grease container (2) is placed on a trolley (1).

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