Direct push type sampling diaphragm pump

Abstract

The utility model discloses a direct push type sampling diaphragm pump, which reduces the vibration and noise of the whole sampling diaphragm pump and prolongs the service life. The power source comprises a power source output shaft, the power source output shaft is horizontally arranged, and output ends are arranged on the two sides of the power source output shaft in a protruding mode; a first pump body; and a second pump body; each of the first pump body and the second pump body comprises an air inlet, an air outlet, 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 at the bottom of the negative pressure cabin, and a downwards convex connecting rod is arranged at the lower part of the rubber diaphragm; the first pump body and the second pump body are both vertically arranged, the first pump body and the second pump body are arranged on the two sides of the power source output shaft respectively, and the output end of each side of the power source output shaft extends into an inner cavity of the pump body on the corresponding side.

Description

Technical Field

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

[0002] During the waste gas treatment process, the waste gas in the gas tank needs to be extracted and tested. Only after the discharge requirements are met can the next step of the operation be carried out.

[0003] Current technology involves allowing the internal gas to escape by opening a valve. However, while the exhaust gas can escape under certain pressure, it becomes difficult to extract the gas for testing if the pressure inside the gas tank is low. Existing sampling gas pumps generate significant vibration and noise during use, and their structural design contains unbalanced forces. Diaphragm-type pumps are prone to diaphragm damage and significant vibration due to these unbalanced forces, resulting in reduced lifespan and noise levels. Piston-type pumps, with their piston movement, are also prone to seal failure and significant vibration.

[0004] Therefore, there is an urgent need to develop a diaphragm pump that can effectively reduce unbalanced forces, thereby ensuring reliable diaphragm operation and low vibration and noise. Utility Model Content

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

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

[0007] A power source, which includes a power source output shaft, wherein the power source output shaft is arranged horizontally and both sides of the power source output shaft are output ends;

[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, an air outlet, 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, the bottom of the negative pressure chamber is provided with a rubber diaphragm, and the lower part of the rubber diaphragm is provided with a downwardly protruding connecting rod.

[0011] The first pump body and the second pump body are both arranged vertically, and are arranged on both sides of the power source output shaft. The output end of each side of the power source output shaft extends into the internal cavity of the corresponding pump body. The output end of each side is connected to the lower input end of the connecting rod in the corresponding pump body 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 fixedly installed on the output end of each side of the power source output shaft.

[0012] Its further features are:

[0013] The air inlet is connected to the negative pressure chamber via the air inlet one-way valve, and the negative pressure chamber is connected to the air outlet via the air outlet one-way valve. When the rubber diaphragm moves downward, the negative pressure chamber generates negative pressure, and the air inlet one-way valve opens. At this time, external gas enters the negative pressure chamber through the air inlet pipe. When the rubber diaphragm moves upward, the air inlet one-way valve closes, and the air outlet one-way valve opens, forcing the gas out and into the air outlet, thus completing the gas replacement and discharge.

[0014] Its further characteristic is:

[0015] The power source is an electric motor, which is a dual-shaft motor. The horizontally arranged motor has protruding motor shafts on both sides. The vertically arranged first pump body and second pump body are respectively located on both sides of the motor. The motor shafts on the corresponding sides extend directly into the chambers of the first pump body and the second pump body. The negative pressure chambers of the first pump body and the second pump body are located at the upper part of the motor shafts on the corresponding sides. The bottom of the rubber diaphragm of each pump body is fixed with a downwardly protruding connecting rod. An eccentric sleeve is respectively fitted on the motor shaft on each side. The eccentric sleeve is inserted into the lower drive end of the corresponding connecting rod, so that the two connecting rods are driven by the eccentric sleeves at the corresponding positions.

[0016] An eccentric block and a fan blade are sequentially fitted onto the end of the motor shaft away from the motor on each side. The center of gravity of the eccentric block is offset. After the motor shaft rotates, the two negative pressure chambers work together to achieve the suction process through the reciprocating motion of the diaphragm. During the staggered movement of the two sets of connecting rods, the unbalanced force generated is canceled out by the eccentric block and the fan, 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] The first pump body and the second pump body are also provided with a fixed tail cover at the outer end corresponding to the fan blade. The tail cover is provided with a number of heat dissipation holes, which are used to dissipate the internal heat through the combination of the fan and the heat dissipation holes.

[0019] With the structure of this utility model, the two sets of pump bodies are symmetrically arranged on both sides of the motor during operation. When the two pumps are working, the vibration is evenly distributed on both sides of the motor, reducing vibration and unbalanced force. In addition, each set of pump bodies is equipped with an eccentric counterweight. The unbalanced force of the up-and-down movement of the eccentric counterweight and the connecting rod cancels each other out, so that the diaphragm in each set of pump bodies moves up and down, achieving the effect of pumping and discharging gas. This reduces the overall vibration and noise of the sampling diaphragm pump and improves its service life. Attached Figure Description

[0020] Figure 1 This is a simplified schematic diagram of the layout of this utility model;

[0021] Figure 2 This is a schematic diagram illustrating the layout principle of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of this utility model;

[0023] Figure 4 for Figure 3 Side view;

[0024] The names corresponding to the serial numbers in the diagram are as follows:

[0025] 1-Tail cover, 2-First bearing, 3-Pump body, 4-Fan, 5-Valve body, 6-Diaphragm connecting rod, 7-Second bearing, 8-First retaining ring, 9-Eccentric sleeve, 10-Dual output shaft motor, 11-Second retaining ring, 12-First shaft pin, 13-Second shaft pin, 14-Eccentric block, 15-Third retaining ring, 16-Third shaft pin, 17-Motor shaft, 18-Screw. Detailed Implementation

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

[0027] The power source includes a power source output shaft, which is arranged horizontally, and both sides of the power source output shaft are output ends;

[0028] Both the first pump body and the second pump body include an air inlet, an air outlet, 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 bottom of the negative pressure chamber is provided with a rubber diaphragm. The lower part of the rubber diaphragm is provided with a downward protruding connecting rod.

[0029] Both the first and second pump bodies are arranged vertically, positioned on either side of the power source output shaft. Each output end of the power source output shaft extends into the corresponding pump body cavity. Each output end is connected to the lower input end of the connecting rod inside the corresponding pump body via an eccentric mechanism. The power source simultaneously drives the negative pressure chambers of the first and second pump bodies to contract and expand. Each output end of the power source output shaft is also fixedly equipped with an eccentric counterweight.

[0030] The air inlet is connected to the negative pressure chamber via an air inlet check valve, and the negative pressure chamber is connected to the air outlet via an air outlet check valve. When the rubber diaphragm moves downward, the negative pressure chamber generates negative pressure, and the air inlet check valve opens. At this time, external gas enters the negative pressure chamber through the air inlet pipe. When the rubber diaphragm moves upward, the air inlet check valve closes, and the air outlet check valve opens, forcing the gas out and into the air outlet, thus completing the gas replacement and discharge.

[0031] In specific implementation, the power source is a dual-output shaft motor 10, and the eccentric counterweight includes fan blades 4 and eccentric blocks 14. The forces of the fan blades 4, eccentric blocks 14 and the connecting rod are dynamically balanced to reduce vibration and noise. The diaphragm and the connecting rod are integrated into a single piece, forming a diaphragm connecting rod 6.

[0032] An eccentric sleeve 9 is provided on each side of the motor shaft 17 of the dual-output shaft motor 10. The eccentric sleeve 9 is fixed to the motor shaft 17 by a third pin 16. A second bearing 7 is provided on the eccentric sleeve 9. The second bearing 7 is limited by a first retaining ring 8 and a third retaining ring 15. When the motor shaft 17 rotates, it drives the eccentric sleeve 9 to rotate. At this time, due to the eccentric effect, the diaphragm connecting rod 6 moves up and down, realizing the pumping effect. An eccentric block 14 is provided on the motor shaft 17 to balance the force generated by the up and down movement of the diaphragm connecting rod 6, thereby reducing vibration. The eccentric block 14 is fixed to the motor shaft 17 by a second pin 13. A fan 4 is provided on the motor shaft 17. The fan 4 is fixed to the motor shaft 17 by a first pin 12 and is used to circulate the heat inside the pump body 3 out of the pump body. A tail cover 1 is provided on the pump body 3. The tail cover 1 is fixed to the pump body 3 by several screws 18. The tail cover 1 is provided with heat dissipation holes to dissipate the internal heat. A central hole is provided on the tail cover 1, and the first bearing 2 is tightly fitted into the central hole. The outer end of the motor shaft 17 on each side is fixed in the inner hole of the first bearing 2 and is limited by the second retaining ring 11. A valve body 5 is provided above the pump body 3. The valve body 5 is used to move the diaphragm connecting rod 6 to draw in the gas into the valve body, and then discharge it into another cavity through a one-way mechanism.

[0033] Working principle introduction: The pump body is arranged on both sides of the motor. When the two pumps are working, the vibration is evenly distributed on both sides of the motor, reducing vibration and unbalanced force.

[0034] The unbalanced forces of the fan blades and eccentric block moving up and down with the diaphragm connecting rod cancel each other out, causing the diaphragms in the two sets of valve bodies to move up and down, thus achieving the effect of pumping out gas.

[0035] Two sets of pump bodies 3 are set on both sides of the dual-output shaft motor 10. When the motor shaft 17 rotates, it drives the eccentric sleeve 9 to rotate. At this time, the diaphragm connecting rod 6 moves up and down due to the eccentricity, thereby realizing the diaphragm's suction and exhaust effect. The eccentric block 14 on the motor shaft 17 is to balance the unbalanced force generated by the up and down movement of the diaphragm connecting rod 6. The fan 4 set on the motor shaft 17 is to circulate the heat generated by the internal mechanism of the valve body 5 out of the valve body 5. The motor shaft 17 has relatively few parts, and the pump as a whole has few mating parts, resulting in less vibration and noise.

[0036] 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.

[0037] 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 direct-push sampling diaphragm pump, characterized in that, It includes: A power source, which includes a power source output shaft, wherein the power source output shaft is arranged horizontally and both sides of the power source output shaft are output ends; First pump body; And the second pump body; Both the first pump body and the second pump body include an air inlet, an air outlet, 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, the bottom of the negative pressure chamber is provided with a rubber diaphragm, and the lower part of the rubber diaphragm is provided with a downwardly protruding connecting rod. The first pump body and the second pump body are both arranged vertically, and are arranged on both sides of the power source output shaft. The output end of each side of the power source output shaft extends into the internal cavity of the corresponding pump body. The output end of each side is connected to the lower input end of the connecting rod in the corresponding pump body 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 fixedly installed on the output end of each side of the power source output shaft.

2. The direct-push sampling diaphragm pump according to claim 1, characterized in that: The air inlet is connected to the negative pressure chamber via the air inlet one-way valve, and the negative pressure chamber is connected to the air outlet via the air outlet one-way valve. When the rubber diaphragm moves downward, the negative pressure chamber generates negative pressure, and the air inlet one-way valve opens. At this time, external gas enters the negative pressure chamber through the air inlet pipe. When the rubber diaphragm moves upward, the air inlet one-way valve closes, and the air outlet one-way valve opens, forcing the gas out and into the air outlet, thus completing the gas replacement and discharge.

3. A direct-push sampling diaphragm pump according to claim 2, characterized in that: The power source is an electric motor, which is a dual-shaft motor. The horizontally arranged motor has protruding motor shafts on both sides. The vertically arranged first pump body and second pump body are respectively located on both sides of the motor. The motor shafts on the corresponding sides extend directly into the chambers of the first pump body and the second pump body. The negative pressure chambers of the first pump body and the second pump body are located at the upper part of the motor shafts on the corresponding sides. The bottom of the rubber diaphragm of each pump body is fixed with a downwardly protruding connecting rod. An eccentric sleeve is respectively fitted on the motor shaft on each side. The eccentric sleeve is inserted into the lower drive end of the corresponding connecting rod.

4. A direct-push sampling diaphragm pump according to claim 3, characterized in that: An eccentric block and a fan blade are sequentially fitted onto the end of the motor shaft on each side away from the motor, with the center of gravity of the eccentric block being offset.

5. A direct-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.

6. A direct-push sampling diaphragm pump according to claim 4, characterized in that: The first pump body and the second pump body are also provided with a fixed tail cover at the outer end corresponding to the position of the fan blade, and the tail cover is provided with a number of heat dissipation holes.

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