Double-connecting-rod transmission metering pump

Abstract

The utility model belongs to the technical field of metering pumps, and particularly relates to a double-connecting-rod transmission metering pump which comprises a transmission box body, a driving assembly is arranged on the lower portion in the transmission box body, an inclined groove shaft is fixedly installed at the output end of the driving assembly, a sliding groove is formed in the inclined groove shaft, an inclined groove pin is embedded in the sliding groove, and the inclined groove pin is connected with the transmission box body. A core shifting block is arranged on the outer surface of the chute shaft, and the chute pin penetrates through an inner hole in the core shifting block; the crossheads on the left side and the right side do reciprocating motion in the bracket through the two crank-link mechanisms, the diaphragm assembly is driven to do reciprocating motion, when the diaphragm assembly moves towards a rear dead point, the volume cavity of the pump is gradually enlarged to form vacuum, the suction valve is opened under the action of atmospheric pressure or a positive suction pressure head, liquid is sucked in, and the diaphragm assembly is driven to do reciprocating motion. When the diaphragm assembly moves towards the front dead point, the suction valve is closed, the discharge valve is opened, and liquid is squeezed out of the discharge valve, so that the pump achieves the purposes of suction and discharge, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of metering pump technology, specifically a double-linkage driven metering pump. Background Technology

[0002] A metering pump is a type of pump used for the precise delivery of liquids. By controlling flow rate and delivery accuracy, it is widely used in chemical, pharmaceutical, food, and environmental protection industries. Metering pumps not only accurately deliver a specific flow rate of liquid, but also allow for the adjustment of flow rate and pressure, ensuring a stable and reliable liquid delivery process. The single-link crank drive mechanism is one of the common transmission methods in metering pumps, especially in piston-type metering pumps. This drive mechanism is designed to convert the rotary motion of the electric motor into the reciprocating linear motion of the piston to achieve precise liquid delivery.

[0003] However, most existing metering pump transmission mechanisms are single-link crank transmission mechanisms, which have low working efficiency, resulting in poor performance of the metering pump. Therefore, a double-link transmission metering pump is proposed to address the above problems. Utility Model Content

[0004] To overcome the shortcomings of existing technologies and solve the problem that most existing metering pump transmission mechanisms are single-link crank transmission mechanisms with low working efficiency, resulting in poor performance of the metering pump, this utility model proposes a double-link transmission metering pump.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a double-linkage transmission metering pump, including a transmission housing;

[0006] A drive assembly is provided at the bottom inside the transmission housing. A slanted shaft is fixedly installed at the output end of the drive assembly. A sliding groove is opened inside the slanted shaft. A slanted pin is embedded inside the sliding groove. An eccentric block is provided on the outer surface of the slanted shaft. The slanted pin passes through the inner hole inside the eccentric block.

[0007] A crank-connecting rod mechanism is provided on both the left and right sides of the outer surface of the eccentric block, and a diaphragm assembly is provided on the opposite side of the two crank-connecting rod mechanisms.

[0008] One end of the inclined shaft is fixedly installed with a stroke adjusting screw, and a side cover is threaded onto the outer surface of the stroke adjusting screw.

[0009] Preferably, the crank-connecting rod mechanism includes a connecting rod fixedly connected to the outer surface of the eccentric block, one end of the connecting rod is fixedly mounted with a crosshead by a pin, the pin passes through a hole inside the connecting rod and a hole inside the crosshead, and the crosshead is threadedly connected to the diaphragm assembly.

[0010] Preferably, the drive assembly includes a worm gear rotatably connected to the lower part of the transmission housing, and a worm wheel meshing with the outer surface of the worm gear, the worm wheel being disposed on the outer surface of the inclined groove shaft.

[0011] Preferably, the outer surface of the inclined groove shaft is fixedly mounted to the worm gear by a key.

[0012] Preferably, one end of the stroke adjusting screw is fitted with a handle via a screw and a disassembly assembly.

[0013] Preferably, the disassembly assembly includes a through mounting groove located at the center of the handle, with a connecting block running through the mounting groove. The connecting block is fixedly installed by screws and a stroke adjustment screw. Sliding grooves are provided on both the left and right sides of the connecting block, and a slider is slidably connected inside the sliding groove. A spring is fixedly connected between the slider and the sliding groove. A locking block is fixedly connected to one side of the slider. Locking slots are provided on both the left and right sides of the mounting groove, and one side of the locking block is engaged inside the locking slot.

[0014] Preferably, the card block is rectangular, and the bottom of the card block inside the card slot is arc-shaped.

[0015] The advantages of this utility model are:

[0016] 1. This utility model uses two connecting rods on the left and right sides to form two sets of crank-connecting rod mechanisms, so that the crossheads on the left and right sides reciprocate within the bracket, and drive the diaphragm assembly to reciprocate. When the diaphragm assembly moves to the rear dead center, the pump volume chamber gradually increases to form a vacuum. Under the action of atmospheric pressure or positive suction head, the suction valve is opened and liquid is sucked in. When the plunger moves to the front dead center, the suction valve closes and the discharge valve opens, and the liquid is squeezed out of the valve, so that the pump achieves the purpose of suction and discharge.

[0017] 2. When the handle of this utility model is damaged and needs to be disassembled and replaced, the handle is moved upward to squeeze the locking block inside the slot. After the locking block is squeezed, it is retracted by the squeezing slider and the spring. Then, the locking block is completely removed from the slot and can be released from the limiting installation of the handle. The handle can be removed from the outer surface of the connecting block by continuing to move the handle, thus facilitating the disassembly and replacement of the damaged handle. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1This is a partial cross-sectional view of the hydraulic cleaning pump head of the metering pump in Embodiment 1;

[0020] Figure 2 This is a schematic diagram of the linkage structure in Example 1;

[0021] Figure 3 This is a schematic diagram of the eccentric block structure in Example 1;

[0022] Figure 4 This is a partial cross-sectional view of the disassembly assembly in Embodiment 2.

[0023] In the diagram: 1. Transmission housing; 2. Connecting rod; 3. Eccentric block; 4. Slanted shaft; 5. Slanted pin; 6. Side cover; 7. Crosshead; 8. Diaphragm assembly; 9. Stroke adjusting screw; 10. Worm gear; 11. Worm; 12. Key; 13. Handle; 14. Screw; 15. Pin; 16. Locking block; 17. Connecting block; 18. Mounting slot; 19. Slide groove; 20. Slider; 21. Spring; 22. Slot. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] Please see Figure 1-3 As shown, a double-linkage metering pump includes a transmission housing 1;

[0027] A drive assembly is provided at the bottom of the transmission housing 1. A slanted shaft 4 is fixedly installed at the output end of the drive assembly. A sliding groove is provided inside the slanted shaft 4. A slanted pin 5 is embedded inside the sliding groove. An eccentric block 3 is provided on the outer surface of the slanted shaft 4. The slanted pin 5 passes through the inner hole inside the eccentric block 3.

[0028] The outer surface of the eccentric block 3 is provided with crank connecting rod 2 mechanisms on both the left and right sides, and diaphragm assembly 8 is provided on the opposite side of the two crank connecting rod 2 mechanisms.

[0029] One end of the inclined shaft 4 is fixedly equipped with a stroke adjusting screw 9, and the outer surface of the stroke adjusting screw 9 is threaded with a side cover 6. During operation, an external motor drives the drive assembly, which in turn drives the inclined shaft 4 to rotate. The inclined pin 5 is embedded in the sliding groove of the inclined shaft 4, and the inclined pin 5 passes through the inner hole of the eccentric block 3 to connect the eccentric block 3 and the inclined shaft 4. Therefore, the drive assembly can drive the inclined shaft 4 and the eccentric block 3 to rotate. Then, two crank connecting rods 2 are provided on the eccentric block 3. After the eccentric block 3 rotates, the diaphragm assembly 8 can reciprocate. When the diaphragm assembly 8 moves to the rear dead point, the pump volume chamber gradually increases to form a vacuum. Under the action of atmospheric pressure or positive suction head, the suction valve is opened, and liquid is sucked in. When the diaphragm assembly 8 moves to the front dead point, the suction valve closes and the discharge valve opens, and the liquid is squeezed out of the valve, so that the pump achieves the purpose of suction and discharge, thereby improving working efficiency and reducing equipment management costs. At the same time, this utility model has a simple structure and is easy to promote.

[0030] The crank-connecting rod 2 mechanism includes a connecting rod 2 fixedly connected to the outer surface of the eccentric block 3. One end of the connecting rod 2 is fixedly mounted with a crosshead 7 via a pin 15. The pin 15 passes through a hole inside the connecting rod 2 and a hole inside the crosshead 7. The crosshead 7 is threadedly connected to the diaphragm assembly 8. During operation, the pin 15 passes through the hole inside the connecting rod 2 and the hole inside the crosshead 7, connecting the connecting rod 2 and the crosshead 7. The crosshead 7 is threadedly connected to the diaphragm assembly 8, and two sets of crank-connecting rod 2 mechanisms are formed by the left and right connecting rods 2, so that the crossheads 7 on both sides reciprocate within the bracket, driving the diaphragm assembly 8 to reciprocate. When the diaphragm assembly 8 moves to the rear dead center, the pump volume chamber gradually increases to form a vacuum. Under the action of atmospheric pressure or positive suction head, the suction valve is opened, and liquid is sucked in. When the plunger moves to the front dead center, the suction valve closes, the discharge valve opens, and liquid is squeezed out of the valve, so that the pump achieves the purpose of suction and discharge.

[0031] The drive assembly includes a worm gear 11 rotatably connected to the lower part of the transmission housing 1. A worm wheel 10 is meshed with the outer surface of the worm gear 11 and is disposed on the outer surface of the inclined groove shaft 4. During operation, an external motor is first powered on to make it work. After the external motor works, it is directly connected to the shaft of the worm gear 11 through a coupling, thereby driving the worm gear 11 to rotate. After the worm gear rotates, it drives the worm wheel 10 and the inclined groove shaft 4 to rotate.

[0032] The outer surface of the inclined groove shaft 4 is fixedly installed to the worm gear 10 via a key 12. During operation, the worm gear 10 is connected to the inclined groove shaft 4 via the key 12, and the rotation of the worm gear 10 can drive the inclined groove shaft 4 to rotate.

[0033] One end of the stroke adjusting screw 9 is connected to the disassembly assembly via a screw 14 and a handle 13. During operation, the handle 13 facilitates the rotation adjustment of the stroke adjusting screw 9, and the screw 14 and disassembly assembly facilitate the disassembly and replacement of the handle 13 if it is damaged.

[0034] Example 2

[0035] Please see Figure 4 As shown in the comparative embodiment one, as another implementation of this utility model, the disassembly assembly includes a through mounting groove 18 formed at the center of the handle 13. A connecting block 17 passes through the mounting groove 18. The connecting block 17 is fixedly installed to the stroke adjusting screw 9 by screws 14. Sliding grooves 19 are provided on both the left and right sides of the connecting block 17. A slider 20 is slidably connected inside the sliding groove 19. A spring 21 is fixedly connected between the slider 20 and the sliding groove 19. A clip is fixedly connected to one side of the slider 20. Block 16 has slots 22 on both the left and right sides inside the mounting groove 18. One side of the locking block 16 is engaged in the slot 22. During operation, the connecting block 17 is fixedly installed to the stroke adjusting screw 9 by screws 14, and the locking block 16 is engaged in the slot 22 to connect the handle 13 and the connecting block 17. When the handle 13 is rotated, the locking block 16 engages in the slot 22, causing the connecting block 17 to rotate. Then, the rotation of the connecting block 17 causes the stroke adjusting screw 9 to rotate. If the handle 13 is damaged, it needs to be disassembled and replaced. When the handle 13 is moved upward, the locking block 16 inside the slot 22 is pressed. After being pressed, the locking block 16 retracts through the pressing slider 20 and the spring 21. Then, the locking block 16 is completely removed from the slot 22, thus releasing the limiting installation of the handle 13. Continuing to move the handle 13 will allow it to be removed from the outer surface of the connecting block 17 for disassembly. When installing a new handle 13, the handle 13 is placed on the outer surface of the connecting block 17, and then the handle 13 is moved downward. After reaching the position of the locking block 16, the locking block is moved. 16 causes the locking block 16 to retract into the mounting groove 18, and when the locking block 16 retracts, it compresses the spring 21, giving the spring 21 a rebound force. Then, as the locking block 16 continues to move the handle 13 inside the mounting groove 18, the locking block 16 aligns with the slot 22. When the locking block 16 aligns with the slot 22, the rebound force of the spring 21 will push the slider 20 to slide, and the locking block 16 will engage inside the slot 22 to limit the installation between the handle 13 and the connecting block 17, thereby facilitating the disassembly and replacement of the handle 13 if it is damaged.

[0036] The locking block 16 is rectangular in shape, and the bottom of the locking block 16 is located inside the locking groove 22 and is arc-shaped. During operation, the rectangular locking block 16 is engaged inside the locking groove 22 to limit the rotation of the connecting block 17 and the stroke adjustment screw 9 driven by the rotation of the handle 13. At the same time, the arc-shaped bottom of the locking block 16 inside the locking groove 22 makes it easier for the locking block 16 inside the locking groove 22 to be squeezed when the handle 13 moves upward.

[0037] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A double-linkage metering pump, comprising a transmission housing (1); Its features are: The transmission housing (1) is equipped with a drive assembly at the bottom inside. The output end of the drive assembly is fixedly installed with a slanted shaft (4). The slanted shaft (4) has a sliding groove inside. A slanted pin (5) is embedded inside the sliding groove. An eccentric block (3) is provided on the outer surface of the slanted shaft (4). The slanted pin (5) passes through the inner hole inside the eccentric block (3). The outer surface of the eccentric block (3) is provided with crank connecting rod (2) mechanism on both the left and right sides, and the two crank connecting rod (2) mechanisms are provided with diaphragm assembly (8) on opposite sides; One end of the inclined shaft (4) is fixedly installed with a stroke adjusting screw (9), and a side cover (6) is threadedly connected to the outer surface of the stroke adjusting screw (9).

2. The double-linkage metering pump according to claim 1, characterized in that: The crank connecting rod (2) mechanism includes a connecting rod (2) fixedly connected to the outer surface of the eccentric block (3). One end of the connecting rod (2) is fixedly mounted with a crosshead (7) by a pin (15). The pin (15) passes through the hole inside the connecting rod (2) and the hole inside the crosshead (7). The crosshead (7) is threadedly connected to the diaphragm assembly (8).

3. The double-linkage metering pump according to claim 2, characterized in that: The drive assembly includes a worm (11) rotatably connected to the lower part of the transmission housing (1), and a worm wheel (10) meshing with the outer surface of the worm (11), the worm wheel (10) being disposed on the outer surface of the inclined shaft (4).

4. A double-linkage metering pump according to claim 3, characterized in that: The outer surface of the inclined shaft (4) is fixedly installed to the worm gear (10) by a key (12).

5. A double-linkage metering pump according to claim 4, characterized in that: One end of the stroke adjusting screw (9) is connected to the disassembly assembly via a screw (14) and a handle (13).

6. A double-linkage metering pump according to claim 5, characterized in that: The disassembly assembly includes a through mounting groove (18) located at the center of the handle (13). A connecting block (17) runs through the mounting groove (18). The connecting block (17) is fixedly installed with a stroke adjusting screw (9) by a screw (14). Sliding grooves (19) are provided on both the left and right sides of the connecting block (17). A slider (20) is slidably connected inside the sliding groove (19). A spring (21) is fixedly connected between the slider (20) and the sliding groove (19). A locking block (16) is fixedly connected to one side of the slider (20). A locking groove (22) is provided on both the left and right sides of the mounting groove (18). One side of the locking block (16) is locked inside the locking groove (22).

7. A double-linkage metering pump according to claim 6, characterized in that: The card block (16) is rectangular, and the bottom of the card block (16) is located inside the card slot (22) and is arc-shaped.

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