A gear pump for filling machines

Abstract

A gear pump for filling machines effectively solves the problem of reduced filling efficiency due to the need for cooling after long-term operation. The pump includes a pump casing containing a meshing drive gear and a driven gear. A detachable cover plate is installed at the front end of the pump casing. A drive shaft is rotatably mounted on the pump casing and connected to the drive gear. A drive motor, connected to the drive shaft, is fixed to the back of the pump casing. A cooling box located outside the drive shaft is located on the back of the pump casing, and a shaft seal is fitted onto the drive shaft. The cooling box is filled with coolant and cools the drive shaft and shaft seal. This invention features a simple and ingenious structure, is easy to use, and can cool the drive shaft and shaft seal during operation, maintaining them in optimal working condition, reducing downtime, and improving filling efficiency.

Description

Technical Field

[0001] This utility model relates to the field of gear pump technology, and in particular to a gear pump for filling machines. Background Technology

[0002] Gear pumps are used in filling machines to transport filling liquid. The drive shaft and shaft seal in the gear pump will heat up after running for a long time. After heating up, the seal will not be tight, causing leakage of filling liquid. Therefore, after running for a period of time, it is often necessary to stop the machine to allow the drive shaft and shaft seal to cool down before resuming work. This seriously affects the filling progress. Utility Model Content

[0003] To overcome the shortcomings of the existing technology, this utility model provides a gear pump for filling machines, which effectively solves the problem that the gear pump needs to be stopped for cooling after long-term operation, which affects the filling efficiency.

[0004] The technical solution to the technical problem is as follows: a gear pump for a filling machine, including a pump casing, a driving gear and a driven gear for meshing transmission inside the pump casing, a cover plate detachably provided at the front end of the pump casing, a drive shaft rotatably mounted on the pump casing, the drive shaft being connected to the driving gear, a drive motor that is connected to the drive shaft and fixed on the back side of the pump casing, a cooling box located outside the drive shaft on the back side of the pump casing, a shaft seal sleeved on the outside of the drive shaft on the cooling box, and coolant filling the cooling box to cool the drive shaft and shaft seal.

[0005] Preferably, the front end of the pump casing is provided with a groove, the depth of which is greater than the thickness of the drive gear, and the cover plate is provided with a protrusion protruding into the pump casing. The cover plate is fixed in the groove, and the protrusion and the pump casing form a sealed chamber, with the distance between the protrusion and the pump casing being equal to the thickness of the drive gear.

[0006] Preferably, the edge of the settling tank is provided with a first sealing ring.

[0007] Preferably, the pump casing has multiple fixing rods extending from its back side.

[0008] Preferably, the drive motor and drive shaft are driven by a chain, and the chain is placed inside a chain box.

[0009] Preferably, the cooling box is detachably installed on the back side of the pump casing, with an opening on the side of the cooling box that contacts the pump casing and is provided with a second sealing ring.

[0010] Preferably, the cooling box is provided with an inlet pipe and an outlet pipe, which are connected to the coolant tank, so that a loop is formed between the cooling box and the coolant tank.

[0011] This utility model has a simple and ingenious structure and is easy to use. It can cool and reduce the temperature of the drive shaft and shaft seal during operation, keeping them in optimal working condition, reducing downtime, and improving filling efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a gear pump for a filling machine according to this utility model. Figure 1 .

[0013] Figure 2 This is a schematic diagram of the structure of a gear pump for a filling machine according to this utility model. Figure 2 .

[0014] Figure 3 This is a cross-sectional schematic diagram of a gear pump for a filling machine according to this utility model.

[0015] Figure 4 This utility model relates to a gear pump for a filling machine. Figure 3 Schematic diagram of cross section AA.

[0016] Figure 5 This is a schematic diagram of the structure of a gear pump for a filling machine after removing the cover plate.

[0017] Figure 6 This is a schematic diagram of the structure of the cover plate in a gear pump for a filling machine according to this utility model.

[0018] Figure 7 This is a schematic diagram of the cooling box in a gear pump for a filling machine according to this utility model. Detailed Implementation

[0019] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0020] Depend on Figures 1 to 7 It is known that a gear pump for a filling machine includes a pump housing 1, a driving gear 2 and a driven gear 3 that mesh and drive each other inside the pump housing 1, a cover plate 4 that is detachably provided at the front end of the pump housing 1, a drive shaft 5 that is rotatably provided on the pump housing 1, the drive shaft 5 being connected to the driving gear 2, a drive motor 6 that is connected to the drive shaft 5 and fixed on the back side of the pump housing 1, and a cooling box 7 located outside the drive shaft 5 on the back side of the pump housing 1, a shaft seal 8 that is sleeved on the outside of the drive shaft 5, the cooling box 7 being filled with coolant, and the cooling box 7 cooling down the drive shaft 5 and the shaft seal 8.

[0021] In practical use, this utility model Install this gear pump onto the filling mechanism. The suction pipe 17 is connected to the filling liquid, and the discharge pipe 18 is connected to the filling port. Start filling, and the drive shaft 5 drives the drive gear 2 to rotate. The drive gear 2 and the driven gear 3 transport the filling liquid. The drive shaft 5 extends outside the pump housing 1, and a cooling box 7 is set outside the drive shaft 5 to cool the drive shaft 5 and the shaft seal 8, so as to maintain a low working temperature, reduce the frequency of downtime, extend the working time, and improve the working efficiency.

[0022] The front end of the pump casing 1 is provided with a groove 9, the depth of which is greater than the thickness of the drive gear 2. The cover plate 4 is provided with a protrusion 10 that protrudes into the pump casing 1. The cover plate 4 is fixed in the groove 9. The protrusion 10 and the pump casing 1 form a sealed chamber and the distance between the protrusion 10 and the pump casing 1 is equal to the thickness of the drive gear 2. The edge of the groove 9 is provided with a first sealing ring 11.

[0023] The cover plate 4 is detachably connected to the pump casing 1 and is used for maintenance of the transmission gears.

[0024] A seal is formed between the cover plate 4 and the pump casing 1 to prevent leakage.

[0025] The protrusion 10 on the inner side of the cover plate 4 is provided to allow for the rotation of the drive shaft 5 and the driven gear 3, reducing radial runout. At the same time, the protrusion 10 extends into the interior so that the drive gear 2 and the driven gear 3 have no axial displacement, maintaining stable operation.

[0026] Multiple fixing rods 12 extend from the back of the pump casing 1 to fix the pump casing 1 inside the filling equipment.

[0027] The drive motor 6 and the drive shaft 5 are driven by a chain. The chain is placed in the chain box 13. The drive motor 6 is connected to the chain again through a reducer. The chain box 13 protects the chain and the drive sprocket.

[0028] The cooling box 7 is detachably installed on the back side of the pump housing 1. The side of the cooling box 7 that contacts the pump housing 1 is open and is provided with a second sealing ring 14. The cooling box 7 forms a seal with the back of the pump housing 1 through the second sealing ring 14 to prevent the coolant from leaking.

[0029] The cooling tank 7 is equipped with an inlet pipe 15 and an outlet pipe 16. The inlet pipe 15 and the outlet pipe 16 are connected to the coolant tank, so that a loop is formed between the cooling tank 7 and the coolant tank. The coolant tank cools the coolant so that it enters the cooling tank 7 at a low temperature. The coolant directly contacts the drive shaft 5 and the shaft seal 8, cooling the drive shaft 5 and the shaft seal 8. This allows the shaft seal 8 and the drive shaft 5 to continue to operate at a low temperature, avoiding liquid leakage caused by the shaft seal 8 heating up. This reduces the adverse impact of shutdown for cooling on the production schedule and indirectly improves filling efficiency.

[0030] Compared with the prior art, this utility model has the following advantages: it can cool down the drive shaft and shaft seal in time, keep them running at a low temperature, avoid leakage, reduce downtime, and indirectly improve filling efficiency.

Claims

1. A gear pump for a filling machine, characterized in that, The pump housing (1) includes a pump casing (1), which is equipped with a drive gear (2) and a driven gear (3) for meshing transmission. A cover plate (4) is detachably provided at the front end of the pump casing (1). A drive shaft (5) is rotatably provided on the pump casing (1). The drive shaft (5) is connected to the drive gear (2). A drive motor (6) is fixed on the back side of the pump casing (1) and is connected to the drive shaft (5) for transmission. A cooling box (7) is provided on the back side of the pump casing (1) outside the drive shaft (5). A shaft seal (8) is provided on the cooling box (7) and is sleeved on the outside of the drive shaft (5). The cooling box (7) is filled with coolant and the cooling box (7) cools down the drive shaft (5) and the shaft seal (8).

2. A gear pump for a filling machine according to claim 1, characterized in that The pump housing (1) has a groove (9) at the front end. The depth of the groove (9) is greater than the thickness of the drive gear (2). The cover plate (4) has a protrusion (10) that protrudes into the pump housing (1). The cover plate (4) is fixed in the groove (9). The protrusion (10) and the pump housing (1) form a sealed chamber and the distance between the protrusion (10) and the pump housing (1) is equal to the thickness of the drive gear (2).

3. A gear pump for a filling machine according to claim 2, characterized in that The edge of the settling tank (9) is provided with a first sealing ring (11).

4. The gear pump for a filling machine according to claim 1, characterized by The pump casing (1) has multiple fixing rods (12) extending from its back side.

5. The gear pump for a filling machine according to claim 1, wherein The drive motor (6) and drive shaft (5) are driven by a chain, and the chain is placed in the chain box (13).

6. A gear pump for a filling machine according to claim 1, characterized in that The cooling box (7) is detachably installed on the back side of the pump housing (1). The cooling box (7) has an opening on the side that contacts the pump housing (1) and is provided with a second sealing ring (14).

7. The gear pump for a filling machine according to claim 1, wherein The cooling tank (7) is provided with an inlet pipe (15) and an outlet pipe (16), which are connected to the coolant tank, so that a loop is formed between the cooling tank (7) and the coolant tank.

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