Lateral pushing type sampling diaphragm pump

Abstract

The utility model discloses a side-push type sampling diaphragm pump, which can reduce the vibration and noise of the whole sampling diaphragm pump and prolong the service life. The power source comprises a power source output shaft; a first pump body; and a second pump body; each of the first pump body and the second pump body comprises an air inlet pipe, an air outlet pipe, an air inlet one-way valve, an air outlet one-way valve, a valve body, a rubber diaphragm and a negative pressure cabin, the negative pressure cabin is arranged in the valve body, the rubber diaphragm is arranged in the negative pressure cabin, and the rubber diaphragm is connected with a convex connecting rod; the first pump body, the second pump body and the power source output shaft are located in the same cavity, the first pump body and the second pump body are arranged on the two sides of the power source output shaft respectively, and the power source output shaft is connected with the input ends of the connecting rods on the corresponding sides through eccentric mechanisms. The power source drives the negative pressure cabins of the first pump body and the second pump body to contract and expand at the same time, and an eccentric balancing weight is further fixedly installed on an output shaft of the power source.

Description

Technical Field

[0001] This utility model relates to the technical field of diaphragm pumps, specifically a side-push sampling diaphragm pump. Background Technology

[0002] In a sealed chamber, it is necessary to test for toxic and harmful gases to determine whether they meet emission standards. However, because the gas pressure inside the chamber is sometimes too low to automatically flow into the detection pipeline, the gas is usually extracted using a suction device for testing.

[0003] Currently used equipment, such as piston-type or diaphragm-type air pumps, can cause significant vibration and noise in certain situations, making them unsuitable for some applications. Furthermore, older air pumps were bulky and poorly integrated in their design, making them time-consuming and labor-intensive to use. The significant vibration also caused damage to the internal diaphragm after a certain period of operation, resulting in a relatively short lifespan. Current methods for improving the lifespan of diaphragm-type air pumps by reducing vibration are still relatively outdated and the technology is not yet mature.

[0004] Therefore, there is an urgent need for a diaphragm pump that can effectively reduce vibration and noise during the gas extraction process. Utility Model Content

[0005] To address the aforementioned problems, this invention provides a side-push sampling diaphragm pump, which reduces the overall vibration and noise of the sampling diaphragm pump and improves its service life.

[0006] A side-push sampling diaphragm pump, characterized in that it comprises:

[0007] A power source, which includes a power source output shaft;

[0008] First pump body;

[0009] And the second pump body;

[0010] Both the first pump body and the second pump body include an air inlet pipe, an air outlet pipe, an air inlet check valve, an air outlet check valve, a valve body, a rubber diaphragm, and a negative pressure chamber. The valve body is provided with a negative pressure chamber, and the negative pressure chamber is provided with a rubber diaphragm. The rubber diaphragm is connected to an outwardly protruding connecting rod.

[0011] The first pump body, the second pump body, and the power source output shaft are located in the same cavity. The first pump body and the second pump body are arranged on both sides of the power source output shaft. The power source output shaft is connected to the input end of the corresponding side connecting rod through an eccentric mechanism. The power source simultaneously drives the negative pressure chambers of the first pump body and the second pump body to contract and expand. An eccentric counterweight is also fixed on the power source output shaft.

[0012] Its further features are:

[0013] The air inlet pipe is connected to the negative pressure chamber through the air inlet one-way valve, and the negative pressure chamber is connected to the air outlet pipe through the air outlet one-way valve. When the rubber diaphragm moves to one side, the negative pressure chamber generates negative pressure, the air inlet one-way valve opens, and at this time, external gas enters the negative pressure chamber through the air inlet pipe. When the rubber diaphragm moves to the other side, the air inlet one-way valve closes, and at this time, the air outlet one-way valve opens, the gas is squeezed out and enters the air outlet pipe, completing the replacement and discharge of gas.

[0014] Its further characteristic is:

[0015] A pump body shell is fixedly mounted on the mounting plate. Independent negative pressure chambers are respectively provided on both sides of the cavity of the pump body shell. Each negative pressure chamber is covered with a corresponding diaphragm. Each set of diaphragms is fixedly mounted with a connecting rod. A motor is fixedly mounted in the middle of the width direction of the upper surface of the pump body shell. The motor shaft of the motor extends into the cavity of the pump body shell. Two sets of eccentric sleeves are respectively fitted on the motor shaft. One set of eccentric sleeves is inserted into the driving end of one connecting rod, and the other set of eccentric sleeves is inserted into the driving end of another connecting rod, so that the two connecting rods are driven by the eccentric sleeves respectively.

[0016] The lower end of the motor shaft is also fitted with a bias fan. The center of gravity of the bias fan is offset. After the motor shaft rotates, the two negative pressure chambers work together. Through the reciprocating motion of the diaphragm, the suction process is realized. During the cross motion of the two sets of connecting rods, the unbalanced force generated is canceled by the bias fan, so that the overall center of gravity is on the axis of the motor shaft, thereby reducing the unbalanced force and thus reducing vibration and noise.

[0017] Each set of eccentric sleeves is fixed to the motor shaft by a pin. The outer ring of each set of eccentric sleeves is fitted with a bearing, and the outer ring of the corresponding bearing is inserted into the corresponding mounting hole of the connecting rod, which makes the transmission stable and reliable.

[0018] With the structure of this utility model, during operation, the imbalance caused by the movement of the diaphragm in the negative pressure chambers on both sides is balanced by rotating the eccentric counterweight. On the other hand, the pump body arranged on both sides of the power source output shaft allows the two sets of diaphragms to move in the cavity, reducing the overall vibration and noise of the sampling diaphragm pump and improving its service life. Attached Figure Description

[0019] Figure 1 This is a simplified schematic diagram of the layout of this utility model;

[0020] Figure 2 This is a schematic diagram illustrating the layout principle of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of this utility model;

[0022] Figure 4A three-dimensional structural diagram of the eccentric fan applicable to this utility model;

[0023] The names corresponding to the serial numbers in the diagram are as follows:

[0024] 1-Inlet pipe; 2-Inlet check valve; 3-Outlet check valve; 4-Valve body; 5-Rubber diaphragm; 6-Connecting rod; 7-Motor; 8-Negative pressure chamber; 9-Eccentric counterweight; 10-Outlet pipe;

[0025] 1-1-Left valve body; 1-2-Left diaphragm; 1-3-Left connecting rod; 1-4-Motor shaft; 1-5-Motor; 1-6-First pin; 1-7-First eccentric sleeve; 1-8-First retaining ring; 1-9-Second retaining ring; 1-10-First bearing; 1-11-Right valve body; 1-12-Third retaining ring; 1-13-Pump body; 1-14-Second eccentric sleeve; 1-15-Bearing end cover; 1-16-Second pin; 1-17-Second bearing; 1-18-Fourth retaining ring; 1-19-Third shaft pin; 1-20-Fifth retaining ring; 1-21-Third bearing; 1-22-Right connecting rod; 1-23-Right diaphragm; 1-24-Mounting plate; 1-25-Eccentric fan. Detailed Implementation

[0026] A side-push sampling diaphragm pump, see Figures 1-2 It includes a power source, a first pump body, and a second pump body;

[0027] Both the first pump body and the second pump body include an air inlet pipe 1, an air outlet pipe 10, an air inlet check valve 2, an air outlet check valve 3, a valve body 4, a rubber diaphragm 5, and a negative pressure chamber 8. The valve body 4 is provided with a negative pressure chamber 8, and the negative pressure chamber 8 is provided with a rubber diaphragm 5. The rubber diaphragm 5 is connected to an outwardly protruding connecting rod 6.

[0028] The first pump body, the second pump body, and the power source output shaft are located in the same cavity. The first pump body and the second pump body are arranged on both sides of the power source output shaft. The power source output shaft is connected to the input end of the corresponding side connecting rod 7 through an eccentric mechanism. The power source simultaneously drives the negative pressure chamber 8 of the first pump body and the second pump body to contract and expand. An eccentric counterweight 9 is also fixed on the power source output shaft.

[0029] In specific implementation, the first pump body is the left pump body 1-1, and the second pump body is the right pump body 1-11;

[0030] The power source is motor 1-5, the power source output shaft is motor shaft 1-4, and the eccentric counterweight is eccentric fan 1-25;

[0031] A pump housing 1-13 is mounted on a mounting plate 1-24. The pump housing 1-13 is fixed to the mounting plate 1-24 by a number of screws. A motor 1-5 is fixed to the upper part of the pump housing 1-13 by a number of screws. The motor shaft 1-4 of the motor 1-5 is vertically inserted into the pump housing 1-13. A bearing end cover 1-15 is provided at the lower part of the pump housing 1-13. The bearing end cover 1-15 is fixed to the corresponding position of the pump housing 1-13 by screws. A second bearing 1-17 is installed at the center of the bearing end cover 1-15 by a tight fit. The inner ring of the second bearing 1-17 mates with the motor shaft 1-4 and straightens the motor shaft 1-4, ensuring that the motor shaft 1-4 is stable and does not have an off-center load during rotation. There is a groove at the lower end of the motor shaft 1-4 for setting a fourth retaining ring 1-18 to limit the second bearing 1-17.

[0032] A left valve body 1-1 is fixed on the left side of the pump body housing 1-13. The left valve body 1-1 is used to draw in and discharge gas and has a built-in one-way valve mechanism. A first eccentric sleeve 1-7 is provided on the motor shaft 1-4. The first eccentric sleeve 1-7 is fixed to the motor shaft 1-4 by a first shaft pin 1-6. The outer ring of the first eccentric sleeve 1-7 is fitted with the inner ring of the first bearing 1-10. The outer ring of the first bearing 1-10 mates with the inner hole of the left connecting rod 1-3. The first eccentric sleeve 1-7 is provided with two slots, respectively provided with a first retaining ring 1-8 and a second retaining ring 1-9. The first retaining ring 1-8 and the second retaining ring 1-9 are used to limit the first bearing 1-10 in the inner hole of the left connecting rod 1-3. The left connecting rod 1-3 is connected to the left diaphragm 1-2. When the motor shaft 1-4 rotates, it drives the first eccentric sleeve 1-7 to rotate. Due to its certain eccentricity, the first bearing 1-10 rotates when the first eccentric sleeve 1-7 rotates. Then, the left connecting rod 1-3 moves left and right, driving the left diaphragm 1-2 to move left and right. Gas suction and displacement are realized through the left valve body 1-1.

[0033] A right valve body 1-11 is fixedly mounted on the right side of the pump housing 1-13. The right valve body 1-11 is used for gas intake and exhaust and has a built-in one-way valve mechanism. A second eccentric sleeve 1-14 is provided on the motor shaft 1-4, and the second eccentric sleeve 1-14 is fixedly connected to the motor shaft 1-4 by a third shaft pin 1-19. The inner ring of the third bearing 1-21 is fitted onto the second eccentric sleeve 1-14, and the outer ring of the third bearing 1-21 mates with the inner hole of the right connecting rod 1-22. The second eccentric sleeve 1-14 has two slots, respectively provided with a third retaining ring 1-12 and a fifth retaining ring 1-20. The third retaining ring 1-12 and the fifth retaining ring 1-20 are used to limit the third bearing 1-21 in the inner hole of the right connecting rod 1-22. The right connecting rod 1-22 is connected to the right diaphragm 1-23. When the motor shaft 1-4 rotates, it drives the second eccentric sleeve 1-14 to rotate. Due to its certain eccentricity, the third bearing 1-21 rotates when the second eccentric sleeve 1-14 rotates. This causes the right connecting rod 1-22 to move left and right, driving the right diaphragm 1-23 to move left and right. This allows the gas to be drawn in and replaced through the right valve body 1-11.

[0034] In specific implementation, a bias fan 1-25 is provided at the lower end of the motor shaft 1-4. The bias fan 1-25 is fixed to the motor shaft 1-4 as a whole by the second pin 1-16. The bias fan's center of gravity is offset to balance the deflection force between the left connecting rod 1-3 and the right connecting rod 1-22 in the pump body shell 1-13, thereby reducing vibration and noise during operation.

[0035] Working principle introduction:

[0036] like Figure 2 3, 4, Motor 1-5 is powered by motor 1-5. The motor shaft 1-4 of motor 1-5 rotates. It is powered by three-phase 380V or two-phase 220V with capacitor. The rotation of the first eccentric sleeve 1-7 on the motor shaft 1-4 drives the left connecting rod 1-3 to move left and right, realizing the left and right movement of the left diaphragm 1-2. This makes the one-way valve mechanism inside the left valve body 1-1 function as it is inside the valve body 4, realizing the function of gas suction. The rotation of the second eccentric sleeve 1-14 on the motor shaft 1-4 drives the right connecting rod 1-22 to move left and right, realizing the left and right movement of the right diaphragm 1-23. This makes the one-way valve mechanism inside the right valve body 1-11 function as it is inside the valve body 4, realizing the function of gas suction.

[0037] After the motor shaft 1-4 rotates, the two chambers work together, and the suction process is achieved through the reciprocating motion of the diaphragm. During the alternating motion of the left connecting rod 1-3 and the right connecting rod 1-22, the unbalanced force generated is counteracted by the bias fan 1-25, so that the overall center of gravity is on the axis of the motor shaft 1-4, thereby reducing the unbalanced force and thus reducing vibration and noise.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A side-push sampling diaphragm pump, characterized in that, It includes: A power source, which includes a power source output shaft; First pump body; And the second pump body; Both the first pump body and the second pump body include an air inlet pipe, an air outlet pipe, an air inlet check valve, an air outlet check valve, a valve body, a rubber diaphragm, and a negative pressure chamber. The valve body is provided with a negative pressure chamber, and the negative pressure chamber is provided with a rubber diaphragm. The rubber diaphragm is connected to an outwardly protruding connecting rod. The first pump body, the second pump body, and the power source output shaft are located in the same cavity. The first pump body and the second pump body are arranged on both sides of the power source output shaft. The power source output shaft is connected to the input end of the corresponding side connecting rod through an eccentric mechanism. The power source simultaneously drives the negative pressure chambers of the first pump body and the second pump body to contract and expand. An eccentric counterweight is also fixed on the power source output shaft.

2. The side-push sampling diaphragm pump according to claim 1, characterized in that: The air inlet pipe is connected to the negative pressure chamber through the air inlet one-way valve, and the negative pressure chamber is connected to the air outlet pipe through the air outlet one-way valve. When the rubber diaphragm moves to one side, the negative pressure chamber generates negative pressure, the air inlet one-way valve opens, and at this time, external gas enters the negative pressure chamber through the air inlet pipe. When the rubber diaphragm moves to the other side, the air inlet one-way valve closes, and at this time, the air outlet one-way valve opens, the gas is squeezed out and enters the air outlet pipe, completing the replacement and discharge of gas.

3. A side-push sampling diaphragm pump according to claim 2, characterized in that: A pump housing is fixedly mounted on the mounting plate. Independent negative pressure chambers are provided on both sides of the cavity of the pump housing. Each negative pressure chamber is covered with a corresponding diaphragm. Each set of diaphragms is fixedly mounted with a connecting rod. A motor is fixedly mounted in the middle of the width direction of the upper surface of the pump housing. The motor shaft extends into the cavity of the pump housing. Two sets of eccentric sleeves are respectively fitted on the motor shaft. One set of eccentric sleeves is inserted into the drive end of one connecting rod, and the other set of eccentric sleeves is inserted into the drive end of another connecting rod.

4. A side-push sampling diaphragm pump according to claim 3, characterized in that: The lower end of the motor shaft is also fitted with a bias fan, and the center of gravity of the bias fan is set off-center.

5. A side-push sampling diaphragm pump according to claim 3, characterized in that: Each set of eccentric sleeves is fixed to the motor shaft by a pin. The outer ring of each set of eccentric sleeves is fitted with a bearing, and the outer ring of the corresponding bearing is inserted into the corresponding mounting hole of the connecting rod.

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