Wear-resistant piston type metering pump

Abstract

The utility model discloses a wear-resistant piston type metering pump which comprises a pump cavity and a flow limiting mechanism, a liquid outlet is formed in one end of the pump cavity, a liquid inlet is formed in the pump cavity, a partition plate is arranged in the pump cavity, a cavity is formed in one side of the partition plate, a liquid injection opening is formed in the pump cavity, a sealing plug is arranged on the liquid injection opening, and a hole is formed in the partition plate. Cavities are formed in the liquid outlet and the liquid inlet, the flow limiting mechanism comprises a second piston, a gasket is arranged on one face of the second piston, holes are formed in the second piston and the gasket, a limiting column is arranged on one face of the gasket, and a limiting ring, the flow limiting column and the gasket are matched, so that the flow of the liquid outlet and the flow of the liquid inlet are changed, and the effect of preventing backflow is achieved; by opening the sealing plug, the lubricating liquid is injected into the cavity in one side of the partition plate, and when the piston rod reciprocates, the lubricating liquid can be attached to the peripheral surface of the piston rod, so that the lubricating effect is achieved, and the wear-resistant effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of metering pumps, in particular to a wear-resistant piston metering pump. Background Art

[0002] A metering pump is one whose output flow rate can be changed under the condition of constant speed. A variable pump is a metering pump. The biggest difference between them is that the shaft of a variable pump is eccentrically installed. Simply put, after the speed of the metering pump is selected, its flow rate cannot be adjusted. The output flow rate of a variable pump can automatically adjust the flow rate according to the pressure change of the system. That is, the output flow rate is small when the pressure is high and large when the pressure is low. In this way, it can save the number of hydraulic components. However, the flow rate of the metering pump pulsates severely, which can easily increase the wear of the piston rod that reciprocates back and forth in the pump body, thereby easily causing the piston pump to leak. In order to reduce the degree of wear of the piston rod inside the metering pump, this scheme proposes a wear-resistant piston metering pump. Utility Model Content

[0003] The utility model aims to solve the defect in the prior art that the flow pulsation of the metering pump is serious, which easily leads to the aggravation of the internal piston rod, and proposes a wear-resistant piston metering pump.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A wear-resistant piston metering pump comprises a pump cavity and a flow limiting mechanism, wherein a liquid outlet is arranged at one end of the pump cavity, a liquid inlet is arranged on the pump cavity, a partition is arranged inside the pump cavity, one side of the partition is a cavity, a liquid injection port is arranged on the pump cavity, a sealing plug is arranged on the liquid injection port, a hole is arranged on the partition, and cavities are arranged inside the liquid outlet and the liquid inlet, and the flow limiting mechanism comprises a second piston, a gasket is arranged on one side of the second piston, holes are arranged on the second piston and the gasket, a limiting column is arranged on one side of the gasket, the limiting column is matched with the inner part of the limiting ring, a limiting flow column is arranged on the limiting ring, and the limiting flow column is matched with the hole on the gasket.

[0006] Preferably, the pump cavity is welded in the arc groove on the top of the support block, and a base plate is provided at the bottom of the support block.

[0007] Preferably, a base is provided on the substrate, a motor is mounted on the base, a turntable is provided at the output end of the motor, a first rotating shaft is provided on the turntable, the first rotating shaft is fitted in a hole on one end of a connecting rod, a hole is provided at the other end of the connecting rod, a second rotating shaft is fitted in the hole, a connecting block is provided on the second rotating shaft, a piston rod is provided on the connecting block, and a first piston is provided at one end of the piston rod.

[0008] Preferably, the first piston is fitted inside the pump cavity, and the piston rod is fitted on the pump cavity and the hole on the partition.

[0009] Preferably, the piston rod is fitted in a hole on the box body, and the output end of the motor is fitted in a hole on the box body.

[0010] The utility model has the following beneficial effects:

[0011] By cooperating with the limiting ring, the limiting column and the gasket, the flow rate of the liquid outlet and the liquid inlet is changed to prevent backflow. By opening the sealing plug, the lubricating liquid is injected into the cavity on one side of the partition. When the piston rod moves back and forth, the lubricating liquid can adhere to the outer peripheral surface of the piston rod to achieve a lubricating effect, thereby achieving a wear-resistant effect. By starting the motor, the turntable is rotated, and under the action of the first rotating shaft, the connecting rod, the second rotating shaft and the connecting block, the piston rod and the first piston are driven to reciprocate back and forth in the pump chamber, thereby discharging the solution in the pump chamber quantitatively. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the overall structural diagram of the metering pump;

[0013] Figure 2 It is a schematic diagram of the pump chamber structure of the metering pump;

[0014] Figure 3 It is a schematic diagram of the piston rod structure of the metering pump;

[0015] Figure 4 It is a schematic diagram of the structure of the metering pump.

[0016] In the figure: 1. pump chamber; 101. liquid outlet; 102. liquid inlet; 103. partition; 104. liquid injection port; 105. sealing plug; 106. current limiting mechanism; 1061. second piston; 1062. gasket; 1063. limiting column; 1064. limiting ring; 1065. current limiting column; 2. support block; 3. substrate; 4. base; 5. motor; 6. turntable; 7. first rotating shaft; 8. connecting rod; 9. second rotating shaft; 10. connecting block; 11. piston rod; 12. first piston; 13. casing. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0018] Reference Figure 1-4A wear-resistant piston metering pump comprises a pump cavity 1 and a flow limiting mechanism 106. A liquid outlet 101 is arranged at one end of the pump cavity 1, a liquid inlet 102 is arranged on the pump cavity 1, a partition 103 is arranged inside the pump cavity 1, one side of the partition 103 is a cavity, a liquid injection port 104 is opened on the pump cavity 1, a sealing plug 105 is arranged on the liquid injection port 104, holes with the same diameter are opened on the partition 103 and the pump cavity 1, and sealing rings are matched on the piston rod 11 to play a role of sealing and preventing liquid leakage, cavities are opened inside the liquid outlet 101 and the liquid inlet 102, the flow limiting mechanism 106 comprises a second piston 1061, a gasket 1062 is arranged on one side of the second piston 1061, and the second piston 1061 is provided with a gasket 1062. Holes are provided on the two pistons 1061 and the gasket 1062. A limiting column 1063 is provided on one side of the gasket 1062. The limiting column 1063 cooperates with the inner portion of the limiting ring 1064. A limiting flow column 1065 is provided on the limiting ring 1064. The limiting flow column 1065 cooperates with the hole on the gasket 1062. The limiting ring 1064, the limiting flow column 1065 and the gasket 1062 cooperate to change the flow of the liquid outlet 101 and the liquid inlet 102, and achieve the effect of preventing backflow. By opening the sealing plug 105, the lubricating liquid is injected into the cavity on one side of the partition 103. When the piston rod 11 moves back and forth, the lubricating liquid can adhere to the outer peripheral surface of the piston rod 11, thereby achieving a lubricating effect, thereby achieving a wear-resistant effect.

[0019] The pump chamber 1 is welded in the arc groove at the top of the support block 2. A base plate 3 is provided at the bottom of the support block 2. A base plate 4 is provided on the base plate 3. A motor 5 is installed on the base 4. A turntable 6 is provided at the output end of the motor 5. A first rotating shaft 7 is provided on the turntable 6. The first rotating shaft 7 is matched in a hole at one end of a connecting rod 8. A hole is provided at the other end of the connecting rod 8. A second rotating shaft 9 is matched in the hole. A connecting block 10 is provided on the second rotating shaft 9. A piston rod 11 is provided on the connecting block 10. One end of the piston rod 11 is provided with The first piston 12 is fitted in the pump cavity 1, the piston rod 11 is fitted in the holes on the pump cavity 1 and the partition 103, the piston rod 11 is fitted in the hole on the box body 13, and the output end of the motor 5 is fitted in the hole on the box body 13. By starting the motor, the turntable 6 rotates, thereby driving the first rotating shaft 7, the connecting rod 8 and the second rotating shaft 9, thereby driving the connecting block 10, the piston rod 11 and the first piston 12 to reciprocate back and forth, thereby quantitatively discharging the solution in the pump cavity 1.

[0020] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A wear-resistant piston metering pump, comprising a pump chamber (1), characterized in that: A liquid outlet (101) is provided at one end of the pump cavity (1), a liquid inlet (102) is provided on the pump cavity (1), a partition (103) is provided inside the pump cavity (1), one side of the partition (103) is a cavity, a liquid injection port (104) is provided on the pump cavity (1), a sealing plug (105) is provided on the liquid injection port (104), a hole is provided on the partition (103), and cavities are provided inside the liquid outlet (101) and the liquid inlet (102); The invention also comprises a flow limiting mechanism (106), wherein the flow limiting mechanism (106) comprises a second piston (1061), a gasket (1062) is provided on one side of the second piston (1061), holes are provided on the second piston (1061) and the gasket (1062), a limiting column (1063) is provided on one side of the gasket (1062), the limiting column (1063) is fitted inside a limiting ring (1064), a limiting column (1065) is provided on the limiting ring (1064), and the limiting column (1065) is fitted on the hole on the gasket (1062).

2. A wear-resistant piston metering pump according to claim 1, characterized in that: The pump cavity (1) is welded in an arc-shaped groove at the top of the support block (2), and a base plate (3) is provided at the bottom of the support block (2).

3. A wear-resistant piston metering pump according to claim 2, characterized in that: The base plate (3) is provided with a base (4), a motor (5) is mounted on the base (4), a turntable (6) is provided at the output end of the motor (5), a first rotating shaft (7) is provided on the turntable (6), the first rotating shaft (7) is fitted in a hole on one end of a connecting rod (8), the other end of the connecting rod (8) is provided with a hole, a second rotating shaft (9) is fitted in the hole, a connecting block (10) is provided on the second rotating shaft (9), a piston rod (11) is provided on the connecting block (10), and a first piston (12) is provided at one end of the piston rod (11).

4. A wear-resistant piston metering pump according to claim 3, characterized in that: The first piston (12) is fitted inside the pump cavity (1), and the piston rod (11) is fitted on the pump cavity (1) and the hole on the partition (103).

5. A wear-resistant piston metering pump according to claim 3, characterized in that: The piston rod (11) is fitted on a hole on the box body (13), and the output end of the motor (5) is fitted on a hole on the box body (13).

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