An adjustable fluid diaphragm pump

Abstract

The invention discloses an adjustable fluid diaphragm pump, belonging to the technical field of diaphragm pumps. An adjustable fluid diaphragm pump comprises a diaphragm pump body, the diaphragm pump body comprises a pump body with a reciprocating drive assembly arranged at both ends of the reciprocating drive assembly, the pump body has an inner cavity, the reciprocating drive assembly is connected to the inner cavity, a diaphragm is arranged in the inner cavity, the diaphragm divides the inner cavity into an air cavity and a liquid cavity, an extension tube connected to the liquid cavity is arranged at the side wall of the pump body, a cavity adjustment assembly is detachably arranged at the extension tube, the extension tube has a through cavity, and the through cavity, the liquid cavity and the cavity adjustment assembly together form a fluid cavity; the cavity adjustment assembly comprises a shell, and the shell has a connecting cavity. By adjusting the position of the adjusting part in the fluid cavity, the internal volume of the fluid cavity is changed, so as to achieve precise adjustment of the fluid flow, which not only improves the accuracy of the flow regulation, but also avoids the problem of diaphragm damage caused by excessive valve pressure.

Description

Technical Field

[0001] The present invention relates to the technical field of diaphragm pumps, in particular to an adjustable fluid diaphragm pump. Background Art

[0002] The pneumatic diaphragm pump is a new type of conveying machinery, which uses compressed air as the power source. It can completely pump out all kinds of corrosive liquids, liquids with particles, high viscosity, volatile, flammable and highly toxic liquids. It is widely used in various industries and its product quality is well received. The main feature of this pump is that it does not need to be filled with water, can pump flowing liquids, and can also transport some easy-to-flow media. It has a high suction range and adjustable head (0-50 meters). The air source pressure only needs to be greater than 1kg / cm2 to work. It is absolutely fireproof and explosion-proof. It has all the functions of submersible pumps, self-priming pumps, impurity pumps, shielded pumps, and mud pumps, and many characteristics of conveying machinery. The pneumatic double diaphragm pump uses compressed air, nitrogen or natural gas as the power source. The main directional (pneumatic) control valve distributes the compressed air to the gas chamber and applies uniform pressure to the inner surface of the diaphragm.

[0003] However, when existing pneumatic diaphragm pumps adjust the fluid flow, most of them can only change the flow rate by adjusting the air source pressure or the size of the outlet valve. Although the flow rate of the pneumatic diaphragm pump can be roughly controlled by adjusting the air source pressure, the accuracy of this adjustment method is relatively limited. Although the flow rate can also be adjusted by adjusting the size of the outlet valve, the valve will be under great pressure, which will cause the pressure to be transmitted to the diaphragm, which is very likely to cause damage to the diaphragm after a long time. Summary of the invention

[0004] The present invention provides an adjustable fluid diaphragm pump, which can overcome certain defects of the prior art.

[0005] According to the present invention, an adjustable fluid diaphragm pump comprises a diaphragm pump body, the diaphragm pump body comprises a pump body with a reciprocating drive assembly arranged at both ends of the reciprocating drive assembly, the pump body has an inner cavity, the reciprocating drive assembly is connected to the inner cavity, a diaphragm is arranged in the inner cavity, the diaphragm divides the inner cavity into an air cavity and a liquid cavity, an extension tube connected to the liquid cavity is arranged at the side wall of the pump body, a cavity adjustment assembly is detachably arranged at the extension tube, the extension tube has a through cavity, and the through cavity, the liquid cavity and the cavity adjustment assembly together form a fluid cavity;

[0006] The cavity adjustment component comprises a shell, a connecting cavity is provided in the shell, and an adjustment member for adjusting the size of the fluid cavity is slidably provided in the connecting cavity;

[0007] The shell body is also provided with an air inlet passage and an air outlet passage which are connected with the connecting cavity. A connecting pipe for connecting the connecting cavity and the air cavity is provided between the air inlet passage and the air cavity.

[0008] Among them, the reciprocating motion component mainly includes a connecting rod and a connecting rod sleeve as well as a gas distribution valve and a gas distribution valve body. The reciprocating motion component is used to realize the reciprocating motion and gas exchange functions of the pneumatic diaphragm pump.

[0009] Preferably, both upper and lower ends of the fluid cavity are connected with fixed pipes, and a water pipe connected with the fixed pipes is detachably provided between adjacent upper fixed pipes. The fixed pipe has an inserting cavity, and a one-way valve is provided at the inserting cavity.

[0010] Through the above structure, the matching arrangement of the plug-in cavity and the one-way valve makes the installation and removal of the one-way valve simple and quick. At the same time, it is also convenient to maintain and replace the one-way valve, reducing the maintenance cost and time cost of the system.

[0011] Preferably, the one-way valve includes a plug-in tube clamped at the one-way valve, a ball is slidably provided in the plug-in tube, a limiting portion for limiting the ball is provided at one end of the plug-in tube located at the upper fixed tube opening close to the diaphragm pump body, a limiting portion for limiting the ball is provided at one end of the plug-in tube located at the lower fixed tube opening close to the water pipe, and a limiting bracket for the limiting ball is fixedly provided at one end of the plug-in tube away from the limiting portion, and the limiting bracket has a through opening for fluid flow.

[0012] Through the above structure, the plug-in tube, the sphere, the limit part and the limit bracket components are modularly arranged, which is convenient for disassembly and replacement.

[0013] Specifically, when the one-way valve fails or needs to be cleaned, the user can easily remove it from the plug-in tube and repair or replace it without large-scale disassembly and reorganization of the entire system, thereby reducing maintenance costs and time costs.

[0014] Preferably, the shell has an extension portion with the same inner diameter as the extension tube near one end of the extension tube, and a fastener for connecting the extension tube and the extension portion is sleeved on the outer wall of the extension tube.

[0015] Through the above structure, the connection between the shell and the extension tube becomes simple and quick. During installation, it is only necessary to insert the extension tube into the extension part and tighten the fastener to complete the connection. This not only improves the installation efficiency, but also facilitates subsequent maintenance and replacement work. When the pump body parts need to be replaced or repaired, the fasteners can be easily removed and the extension tube can be removed from the shell.

[0016] Preferably, the adjusting member includes a baffle slidably arranged in the connecting cavity, a spring is fixedly arranged coaxially with the baffle and the connecting cavity, a piston is slidably arranged on the outer wall of the spring, a spring is fixedly arranged between the piston and the baffle, the spring is used to provide elastic force to keep the piston sealing the connecting cavity, and a limit plate for limiting the piston is fixedly arranged at one end of the sliding rod away from the connecting cavity.

[0017] Through the above structure, when the diaphragm reciprocates, the baffle and the spring also play a certain buffering and stabilizing role. When the baffle moves, the spring can absorb part of the impact energy to avoid damage to the diaphragm caused by excessive pressure in the fluid cavity. It can also resist the influence of pressure fluctuations in the fluid cavity on the fluid flow to a certain extent, thereby improving the stability of the pump operation.

[0018] At the same time, when the air cavity is exhausted, the gas flows into the connecting cavity through the connecting pipe and the air inlet passage, pushing the back side of the piston, thereby increasing the driving force on the fluid.

[0019] Preferably, the piston has an annular groove at one end close to the communicating cavity, a sealing ring is fixedly provided inside the annular groove, and the sealing ring is in contact with the side wall of the housing.

[0020] Through the above structure, when the volume of the fluid cavity is the largest, the piston is abutted against the side wall of the shell, thereby improving the sealing performance of the fluid cavity.

[0021] Preferably, one end of the baffle away from the limiting plate is threadedly connected with a rotating rod, the rotating rod is rotatably arranged in the shell, and the rotating rod passes through one end of the shell and is fixedly provided with a card cover, which is used to adjust the length of the rotating rod in the fluid cavity.

[0022] Through the above structure, one end of the baffle away from the limiting plate is threadedly connected to the rotating rod, so that the baffle moves with the rotation of the rotating rod, thereby changing the relative position of the baffle in the fluid cavity, so that the volume of the fluid cavity can be adjusted according to needs.

[0023] Preferably, the housing is provided with a plurality of equally spaced clamping strips along the coaxial direction of the rotating rod, and the inner wall of the card cover is provided with a plurality of clamping grooves corresponding to the clamping strips.

[0024] The above structure facilitates the position limiting of the adjusted rotating rod, thereby preventing the rotation of the rotating rod from affecting the adjusted volume of the fluid cavity.

[0025] Preferably, the reciprocating drive assembly is connected to an air intake end for air intake.

[0026] The beneficial effects of the present invention are as follows:

[0027] 1. By adjusting the position of the adjusting part in the fluid cavity, the internal volume of the fluid cavity is changed, thereby realizing precise regulation of the fluid flow, which not only improves the accuracy of flow regulation, but also avoids the problem of diaphragm damage caused by excessive valve pressure;

[0028] 2. Through the setting of the adjusting parts, when the diaphragm reciprocates, the baffle and the spring also play a certain buffering and stabilizing role. When the baffle moves, the spring can absorb part of the impact energy to avoid damage to the diaphragm caused by excessive pressure in the fluid cavity. It can also resist the influence of pressure fluctuations in the fluid cavity on the fluid flow to a certain extent, thereby improving the stability of the pump operation.

[0029] At the same time, when the air cavity is exhausted, the gas flows into the connecting cavity through the connecting pipe and the air inlet passage, pushing the back side of the piston, thereby increasing the driving force on the fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of an adjustable fluid diaphragm pump;

[0031] Figure 2 It is a schematic diagram of the overall rear view structure of an adjustable fluid diaphragm pump;

[0032] Figure 3 It is a schematic diagram of the overall cross-sectional structure of an adjustable fluid diaphragm pump;

[0033] Figure 4 It is a schematic diagram of the structure of a cavity adjustment component of an adjustable fluid diaphragm pump;

[0034] Figure 5 It is a schematic diagram of the cross-sectional structure of a cavity adjustment component of an adjustable fluid diaphragm pump;

[0035] Figure 6 for Figure 5 Schematic diagram of the local enlarged structure at point A in the middle.

[0036] 100, diaphragm pump body; 110, cavity adjustment component; 210, pump body; 220, reciprocating drive component; 230, air inlet end; 240, connecting pipe; 250, water pipe; 260, one-way valve; 310, inner cavity; 320, extension pipe; 340, diaphragm; 350, plug-in cavity; 360, plug-in tube; 370, ball; 380, limit bracket; 410, shell; 420, extension part; 430, adjustment member; 440, fastener; 510, air inlet channel; 520, air outlet channel; 530, rotating rod; 540, card cover; 610, connecting cavity; 620, sliding rod; 630, baffle; 640, piston; 650, spring; 660, limit plate; 670, sealing ring. DETAILED DESCRIPTION

[0037] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the embodiments. It should be understood that the embodiments are only for explaining the present invention and are not intended to limit it.

[0038] Example 1

[0039] See also Figure 1-6The present embodiment provides an adjustable fluid diaphragm pump including a diaphragm pump body 100, the diaphragm pump body 100 including a reciprocating drive assembly 220 and a pump body 210 disposed at both ends of the reciprocating drive assembly 220, the pump body 210 having an inner cavity 310, the reciprocating drive assembly 220 being connected to the inner cavity 310, a diaphragm 340 being disposed in the inner cavity 310, the diaphragm 340 dividing the inner cavity 310 into an air cavity and a liquid cavity, an extension tube 320 being disposed at a side wall of the pump body 210 and being connected to the liquid cavity, a cavity adjustment assembly 110 being detachably disposed at the extension tube 320, the extension tube 320 having a through cavity, the through cavity, the liquid cavity and the cavity adjustment assembly 110 forming a fluid cavity together;

[0040] The cavity adjustment assembly 110 includes a housing 410, wherein a communication cavity 610 is provided in the housing 410, and an adjustment member 430 for adjusting the size of the fluid cavity is slidably provided in the communication cavity 610;

[0041] The housing 410 further includes an air inlet channel 510 and an air outlet channel 520 which are connected to the connecting cavity 610 . A connecting pipe 240 for connecting the connecting cavity 610 and the air cavity is provided between the air inlet channel 510 and the air cavity.

[0042] Among them, the reciprocating motion component mainly includes a connecting rod and a connecting rod sleeve as well as a gas distribution valve and a gas distribution valve body. The reciprocating motion component is used to realize the reciprocating motion and gas exchange functions of the pneumatic diaphragm pump.

[0043] When the present invention is performing flow regulation, the position of the regulating member 430 in the fluid cavity is adjusted to adjust the internal volume of the fluid cavity, so that the fluid flow rate can be adjusted, that is, the volume of the fluid cavity of the required fluid flow rate can be adjusted. Compared with the prior art, the position of the regulating member in the fluid cavity is adjusted to change the internal volume of the fluid cavity, thereby achieving precise regulation of the fluid flow rate, which not only improves the accuracy of flow regulation, but also avoids the problem of diaphragm damage caused by excessive valve pressure.

[0044] In this embodiment, both the upper and lower ends of the fluid cavity are connected with fixed pipes, and a water pipe 250 connected with the fixed pipes is detachably provided between adjacent upper fixed pipes. The fixed pipe has an insertion cavity 350, and a one-way valve 260 is provided at the insertion cavity 350.

[0045] Through the above structure, the matching setting of the plug-in cavity 350 and the one-way valve 260 makes the installation and removal of the one-way valve 260 simple and quick. At the same time, it is also convenient to maintain and replace the one-way valve 260, reducing the maintenance cost and time cost of the system.

[0046] In this embodiment, the one-way valve 260 includes a plug-in tube 360 ​​that is clamped at the one-way valve 260, and a ball 370 is slidably provided in the plug-in tube 360. The plug-in tube 360 ​​located at the upper fixed tube opening is provided with a limiting portion for limiting the ball 370 at one end close to the diaphragm pump body 100, and the plug-in tube 360 ​​located at the lower fixed tube opening is provided with a limiting portion for limiting the ball 370 at one end close to the water pipe 250. A limiting bracket 380 with a limiting ball 370 is fixedly provided at one end of the plug-in tube 360 ​​away from the limiting portion, and the limiting bracket 380 has a through opening for fluid flow.

[0047] Through the above structure, the plug-in tube 360, the sphere 370, the limiting part and the limiting bracket 380 are modularly arranged, which is convenient for disassembly and replacement.

[0048] Specifically, when the one-way valve fails or needs to be cleaned, the user can easily remove it from the plug tube 360 ​​and repair or replace it without large-scale disassembly and reorganization of the entire system, thereby reducing maintenance costs and time costs.

[0049] In this embodiment, the housing 410 has an extension portion 420 with the same inner diameter as the extension tube 320 at one end thereof close to the extension tube 320 , and a fastener 440 for connecting the extension tube 320 and the extension portion 420 is sleeved on the outer wall of the extension tube 320 .

[0050] Through the above structure, the connection between the shell 410 and the extension tube 320 becomes simple and quick. During installation, it is only necessary to insert the extension tube into the extension part and tighten the fastener to complete the connection. This not only improves the installation efficiency, but also facilitates subsequent maintenance and replacement work. When the pump body parts need to be replaced or repaired, the fastener 440 can be easily removed and the extension tube 320 can be removed from the shell 410.

[0051] In this embodiment, the adjusting member 430 includes a baffle 630 slidably arranged in the connecting chamber 610, a spring 650 is fixedly arranged coaxially with the baffle 630 and the connecting chamber 610, a piston 640 is slidably arranged on the outer wall of the spring 650, a spring 650 is fixedly arranged between the piston 640 and the baffle 630, the spring 650 is used to provide elastic force to keep the piston 640 sealing the connecting chamber 610, and a limiting plate 660 for limiting the piston 640 is fixedly arranged at one end of the sliding rod 620 away from the connecting chamber 610.

[0052] Through the above structure, when the diaphragm 340 reciprocates, the baffle 630 and the spring 650 also play a certain buffering and stabilizing role. When the baffle 630 moves, the spring 650 can absorb part of the impact energy to avoid damage to the diaphragm 340 caused by excessive pressure in the fluid cavity. It can also resist the influence of pressure fluctuations in the fluid cavity on the fluid flow to a certain extent, thereby improving the stability of the pump operation.

[0053] At the same time, when the air cavity is exhausted, the gas flows into the communicating cavity 610 through the communicating pipe 240 and the air inlet passage 510, pushing the back side of the piston 640, thereby increasing the driving force on the fluid.

[0054] In this embodiment, the piston 640 has an annular groove at one end close to the communicating chamber 610 , and a sealing ring 670 is fixedly provided inside the annular groove. The sealing ring 670 contacts the side wall of the housing 410 .

[0055] Through the above structure, when the volume of the fluid cavity is the largest, the piston 640 is abutted against the side wall of the housing 410, thereby improving the sealing performance of the fluid cavity.

[0056] In this embodiment, the baffle 630 is threadedly connected to a rotating rod 530 at one end away from the limiting plate 660. The rotating rod 530 is rotatably arranged in the shell 410. The rotating rod 530 passes through the shell 410 and is fixed with a card cover 540 at one end. The card cover 540 is used to adjust the length of the rotating rod 530 in the fluid cavity.

[0057] The rotating rod 530 is also provided with a volume scale to facilitate the user to adjust the flow more intuitively.

[0058] Through the above structure, one end of the baffle 630 away from the limiting plate 660 is threadedly connected to the rotating rod 530, so that the baffle 630 moves with the rotation of the rotating rod 530, thereby changing the relative position of the baffle 630 in the fluid cavity, so that the volume of the fluid cavity can be adjusted as needed.

[0059] In this embodiment, the housing 410 is provided with a plurality of equally spaced clamping strips coaxially with the rotating rod 530 , and the inner wall of the clamping cover 540 is provided with a plurality of clamping grooves corresponding to the clamping strips.

[0060] The above structure facilitates limiting the position of the adjusted rotating rod 530 to prevent the rotating rod 530 from rotating and affecting the adjusted volume of the fluid cavity.

[0061] In this embodiment, the reciprocating drive assembly 220 is connected to an air intake end 230 for air intake.

[0062] The air inlet end 230 is connected to a pneumatic motor that provides air pressure.

[0063] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of this template.

[0064] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present invention. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0065] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An adjustable fluid diaphragm pump, characterized in that: The diaphragm pump body (100) includes a reciprocating drive assembly (220) and a pump body (210) arranged at both ends of the reciprocating drive assembly (220). The pump body (210) has an inner cavity (310). The reciprocating drive assembly (220) is connected to the inner cavity (310). A diaphragm (340) is arranged in the inner cavity (310). The diaphragm (340) divides the inner cavity (310) into an air cavity and a liquid cavity. An extension tube (320) connected to the liquid cavity is arranged at the side wall of the pump body (210). A cavity adjustment assembly (110) is detachably arranged at the extension tube (320). The extension tube (320) has a through cavity. The through cavity, the liquid cavity and the cavity adjustment assembly (110) together form a fluid cavity. The cavity adjustment component (110) comprises a housing (410), wherein a communication cavity (610) is provided in the housing (410), and an adjustment member (430) for adjusting the size of the fluid cavity is slidably provided in the communication cavity (610); The housing (410) further comprises an air inlet channel (510) and an air outlet channel (520) which are arranged in communication with the communication cavity (610); a communication pipe (240) for connecting the communication cavity (610) and the air cavity is arranged between the air inlet channel (510) and the air cavity; The housing (410) has an extension portion (420) with the same inner diameter as the extension tube (320) at one end thereof close to the extension tube (320), and a fastener (440) for connecting the extension tube (320) and the extension portion (420) is sleeved on the outer wall of the extension tube (320); The regulating member (430) comprises a baffle (630) slidably arranged in the communicating cavity (610), a spring (650) being fixedly arranged coaxially between the baffle (630) and the communicating cavity (610), a piston (640) being slidably arranged on the outer wall of the spring (650), a spring (650) being fixedly arranged between the piston (640) and the baffle (630), the spring (650) being used to provide elastic force to keep the piston (640) sealing the communicating cavity (610), and a limiting plate (660) for limiting the piston (640) being fixedly arranged at one end of the sliding rod (620) away from the communicating cavity (610); The piston (640) has an annular groove at one end close to the communicating chamber (610), a sealing ring (670) is fixedly arranged inside the annular groove, and the sealing ring (670) is in contact with the side wall of the housing (410); One end of the baffle (630) away from the limiting plate (660) is threadedly connected to a rotating rod (530), the rotating rod (530) is rotatably arranged in the housing (410), and one end of the rotating rod (530) passes through the housing (410) and is fixedly provided with a card cover (540), and the card cover (540) is used to adjust the length of the rotating rod (530) in the fluid cavity; The housing (410) is provided with a plurality of equally spaced clamping strips in a coaxial direction with the rotating rod (530), and the inner wall of the clamping cover (540) is provided with a plurality of clamping grooves corresponding to the clamping strips.

2. The adjustable fluid diaphragm pump according to claim 1, characterized in that: The upper and lower ends of the fluid cavity are both connected with fixed pipes, and a water pipe (250) connected with the fixed pipes is detachably provided between adjacent upper fixed pipes. The fixed pipe has an inserting cavity (350), and a one-way valve (260) is provided at the inserting cavity (350).

3. The adjustable fluid diaphragm pump according to claim 2, characterized in that: The one-way valve (260) includes a plug-in tube (360) clamped at the one-way valve (260), a ball (370) is slidably arranged in the plug-in tube (360), a limiting portion for limiting the ball (370) is arranged at one end of the plug-in tube (360) located at the upper fixed tube opening close to the diaphragm pump body (100), a limiting portion for limiting the ball (370) is arranged at one end of the plug-in tube (360) located at the lower fixed tube opening close to the water pipe (250), and a limiting bracket (380) for the limiting ball (370) is fixedly arranged at one end of the plug-in tube (360) away from the limiting bracket, and the limiting bracket (380) has a through hole for fluid flow.

4. The adjustable fluid diaphragm pump according to claim 1, characterized in that: The reciprocating drive assembly (220) is connected to an air intake end (230) for air intake.

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