Non-return diaphragm pump

Abstract

The utility model relates to the technical field of diaphragm pumps, and provides a non-return diaphragm pump which comprises a pump body and a driving motor, the pump body comprises a water flow cavity and a driving cavity, an isolation plate is arranged between the water flow cavity and the driving cavity, an air drum frame and an air drum are arranged in the driving cavity, the air drum is linked with the air drum frame, and the air drum frame is linked with an output shaft of the driving motor. The air drum comprises a deformation cavity, the water outlet and the water inlets are all located in the deformation cavity, the water flow cavity is provided with a water outlet pipe, and the water outlet pipe is communicated with the water outlet; a water inlet piston is arranged on the isolation plate and comprises a sliding rod and a shielding plate used for shielding the water inlets, the sliding rod is in sliding connection with the isolation plate, and a limiting structure used for limiting the sliding distance of the sliding rod is arranged between the isolation plate and the sliding rod. According to the technical scheme, the problem that fluid possibly flows back into the pump body through the outlet of the pump body in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of diaphragm pumps, and in particular to a non-return diaphragm pump. Background Art

[0002] A diaphragm pump generally refers to a positive displacement pump that changes the volume of its working chamber through the reciprocating motion of a diaphragm and an air drum, thereby achieving fluid suction and discharge. Specifically, the air drum is usually connected to the drive motor inside the diaphragm pump via an air drum frame. When the drive motor stops, the reciprocating motion of the air drum also stops. During this process, if the air drum does not seal the fluid channel inside the diaphragm pump, and the back pressure or pressure in the fluid channel is higher than the pressure at the pump outlet, the fluid may flow back into the pump through the pump outlet, affecting the actual pumping effect of the pump. Utility Model Content

[0003] The utility model provides a non-return diaphragm pump, which solves the problem in the related art that fluid may flow back into the pump body through the outlet of the pump body.

[0004] The technical solution of the utility model is as follows:

[0005] A check diaphragm pump comprises a pump body and a driving motor, the pump body comprises a water flow chamber and a driving chamber, an isolation plate is provided between the water flow chamber and the driving chamber, an air drum frame and an air drum are provided in the driving chamber, the air drum is linked to the air drum frame, the air drum frame is linked to the output shaft of the driving motor, a water outlet and several water inlets are provided on the isolation plate, the air drum comprises a deformation chamber, the water outlet and each water inlet are located in the deformation chamber, the water flow chamber is provided with a water outlet pipe, the water outlet pipe is communicated with the water outlet; a water inlet piston is provided on the isolation plate, the water inlet piston comprises a sliding rod and a baffle for covering each water inlet, the sliding rod is slidably connected to the isolation plate, and a limiting structure for limiting the sliding distance of the sliding rod is provided between the isolation plate and the sliding rod.

[0006] Furthermore, the sliding rod and the shielding plate are integrally formed, the water inlet piston is made of elastic material, and the shielding plate is an arc-shaped structure.

[0007] Furthermore, the limiting structure includes a limiting sliding hole and a limiting body. The limiting body and the sliding rod are integrally formed. The limiting sliding hole is opened on the isolation plate, and the diameter of the end of the limiting sliding hole close to the air drum is smaller than the diameter of the end of the limiting sliding hole away from the air drum. The sliding rod is slidably connected in the limiting sliding hole.

[0008] Furthermore, the air drums are provided with several, each of which is evenly distributed around the driving motor, and a connecting plate is provided between each air drum. The isolation plate is provided with a water inlet piston, a water outlet, and several water inlets at each air drum, and each of the water outlets is connected to the water outlet pipe.

[0009] Furthermore, a water outlet clamp is provided between the water outlet and the water outlet pipe, and the water outlet clamp includes a plurality of deformable parts and a plurality of fixed parts. Each of the deformable parts is located between adjacent fixed parts and corresponds one-to-one to each water outlet. Each of the fixed parts is evenly distributed around the water outlet pipe and abuts against the water outlet pipe. The deformable part is made of elastic material.

[0010] Furthermore, a limit block for limiting the rotation of the water outlet clamp is provided in the water flow cavity, the limit clamp includes a limit clamp hole, the limit block and the limit clamp hole are engaged with each other, and the projection surface of the limit clamp hole in its axial direction is a polygonal structure.

[0011] Furthermore, the deformation part is arranged at an angle, and the water outlet is located at the end of the deformation part away from the limiting card hole, and the distance between the end of the deformation part away from the limiting card hole and the water outlet is greater than the distance between the end of the deformation part close to the limiting card hole and the water outlet.

[0012] Furthermore, the longitudinal cross-section of the limiting body is a circular structure.

[0013] The working principle and beneficial effects of the utility model are as follows:

[0014] 1. The pump body of the present invention mainly includes a water flow chamber and a drive chamber. The water flow chamber is used to allow fluid to flow in the pump body, while the drive chamber is used to install driving parts such as the air drum frame and the air drum. A separation plate is provided between the water flow chamber and the drive chamber to make the two chambers independent of each other, preventing fluid (liquid) from entering the drive chamber (air chamber) and avoiding liquid contamination of the gas system, thereby ensuring the normal operation of the pump;

[0015] The isolation plate is provided with a water outlet, a water inlet piston, and several water inlets. The water inlet piston includes a sliding rod and a shielding plate for shielding each water inlet. The air drum includes a deformation chamber. The water outlet, the water inlet piston, and each water inlet are all located in the deformation chamber. That is, the air drum is driven to deform by the air drum frame, thereby causing the pressure at both ends of the water inlet to change, causing the fluid to flow, and pushing the water inlet piston to move to open each water inlet, so that the fluid channel is in a smooth state and ensure the normal delivery of the fluid. Once backflow occurs inside the pump body, the fluid will push the water inlet piston to move, close each water inlet, and seal the fluid channel to prevent fluid backflow when the pump body stops working, thereby ensuring the pumping effect of the utility model.

[0016] 2. A limiting structure for limiting the sliding distance of the sliding rod is provided between the isolation plate and the sliding rod in the present invention, thereby preventing the water inlet piston from being affected by pressure and detaching from the isolation plate in the sliding direction, thereby ensuring the stability of the overall structure of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0018] Figure 1 This is a structural diagram of this embodiment;

[0019] Figure 2 for Figure 1 A partial cross-sectional view of

[0020] Figure 3 for Figure 2 A partial enlarged view of the middle part;

[0021] Figure 4 This is a schematic structural diagram of the isolation plate and the air drum frame in this embodiment;

[0022] Figure 5 It is the water outlet card in this embodiment;

[0023] Figure 6 Schematic diagram of the structure of each air drum and air drum frame in this embodiment.

[0024] In the picture:

[0025] 1. Pump body; 11. Water flow chamber; 111. Limit block; 12. Drive chamber; 121. Air drum frame; 122. Air drum; 1221. Deformation chamber; 1222. Connecting plate; 13. Isolation plate; 131. Water outlet; 132. Water inlet; 14. Water outlet pipe; 2. Drive motor; 3. Water inlet piston; 31. Sliding rod; 32. Shielding plate; 4. Limiting structure; 41. Limiting sliding hole; 42. Limiting body; 5. Water outlet clamp; 51. Deformation part; 52. Fixing part; 53. Limiting clamp hole. DETAILED DESCRIPTION

[0026] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] like Figures 1 to 4 As shown, this embodiment proposes a check diaphragm pump, which mainly includes a pump body 1 and a drive motor 2, wherein the pump body 1 also includes a water flow chamber 11 and a drive chamber 12, and an isolation plate 13 is provided between the water flow chamber 11 and the drive chamber 12, so that the water flow chamber 11 and the drive chamber 12 are two independent chambers.

[0028] Among them, the driving chamber 12 is provided with an air drum frame 121 and an air drum 122. The air drum 122 is linked with the air drum frame 121, and the air drum 122 includes a deformation chamber 1221. The air drum frame 121 is linked with the output shaft of the driving motor 2, that is, the air drum 122 can be deformed under the driving force of the driving motor 2.

[0029] A water outlet 131 and several water inlets 132 are provided on the isolation plate 13. The water outlet 131 and each water inlet 132 are all located in the deformation chamber 1221, that is, negative pressure is generated by the deformed air drum 122 to suck the fluid along the water inlets 132. Then, as the drive motor 2 continues to work, the air drum 122 returns to its original state, pushing the fluid to be discharged along the water outlet 131. The water flow chamber 11 is provided with a water outlet pipe 14, which is connected to the water outlet 131, that is, the fluid discharged through the water outlet 131 will eventually flow to the water outlet pipe 14 and be discharged uniformly by the water outlet pipe 14; and the presence of multiple water inlets 132 can not only provide a larger suction area, so that the pump body 1 can easily inhale liquid when processing liquids with higher viscosity or poorer fluidity, but also help to evenly distribute the inflow of fluid, reduce local pressure fluctuations in the pump body 1, and thus improve the overall efficiency.

[0030] At the same time, in order to prevent the fluid from flowing back inside the pump body 1 during the operation of the pump body 1 or when the pump body 1 stops operating, a water inlet piston 3 is provided on the isolation plate 13. The water inlet piston 3 includes a sliding rod 31 and a baffle 32 for covering each water inlet 132. The sliding rod 31 is slidingly connected to the isolation plate 13. In this way, the impact force on the baffle 32 when the fluid flows in each water inlet 132 plus the negative pressure generated by the deformation of the air drum 122 will drive the baffle 32 to move, thereby opening the water inlet 132 for fluid to flow in; on the contrary, when the air drum 122 is reset and the fluid flows back to the water inlet 132, the force applied to the baffle 32 will drive the baffle 32 to move, close the water inlet 132, prevent the fluid from flowing back, and ensure the pumping effect of this embodiment.

[0031] The sliding rod 31 and the baffle plate 32 are integrally formed to ensure the strength and structural stability of the overall structure of the water inlet piston 3. The water inlet piston 3 is made of elastic material. The elastic material constituting the water inlet piston 3 is preferably so that when the water inlet 132 is closed under pressure, it can be deformed in contact with the isolation plate 13, thereby better preventing liquid leakage and improving the working (pumping) efficiency of this embodiment. The baffle plate 32 is an arc-shaped structure. Preferably, the baffle plate 32 should be an arched structure so that the baffle plate 32 can guide the flow of fluid and reduce the turbulence of the fluid inside the pump body 1, thereby improving the operating efficiency of this embodiment.

[0032] like Figure 4 、 Figure 6As shown, the air drum 122 in this embodiment is provided with several, and the isolation plate 13 is provided with a water inlet piston 3, a water outlet 131, and several water inlets 132 at each air drum 122, further increasing the suction area of ​​the fluid to improve the pumping efficiency of this embodiment, and each water outlet 131 is connected to the water outlet pipe 14 to uniformly manage the water outlet work of the pump body 1.

[0033] The air drums 122 are evenly distributed around the driving motor 2 to ensure that the air drums 122 can be evenly stressed during the stress process, and a connecting plate 1222 is provided between the air drums 122. The connecting plate 1222 and the air drums 122 are integrally formed, so that the force exerted by the air drum frame 121 on a certain air drum 122 can be transmitted to the air drum 122 adjacent to it, thereby amplifying the force acting on each air drum 122 and ensuring that each air drum 122 can produce effective deformation to ensure the stable operation of this embodiment.

[0034] like Figure 2 、 Figure 5 As shown, a water outlet clamp 5 is provided between the water outlet 131 and the water outlet pipe 14, that is, a water outlet clamp 5 is provided at the intersection of the water outlet pipe 14 and each water outlet 131 to prevent the fluid from flowing back along each water outlet 131, further reducing the possibility of backflow in this embodiment. Specifically, the water outlet clamp 5 includes a plurality of deformable parts 51 and a plurality of fixed parts 52. Each deformable part 51 is located between adjacent fixed parts 52 and corresponds one to one with each water outlet 131, and the deformable part 51 is made of elastic material. That is, each deformable part 51 can directly face the fluid flowing out of each water outlet 131, and deform under the impact force brought by the fluid, so that a gap for fluid flow appears between the deformable part 51 and the water outlet 131, allowing the fluid to enter the water outlet pipe 14 and complete the water outlet work. On the contrary, when the fluid flows from the outlet pipe 14 to the water outlet 131 , the impact force brought by the flow will push the deformable portion 51 to abut against the water outlet 131 , closing the water outlet 131 and implementing the backflow prevention function.

[0035] The fixing parts 52 are evenly distributed around the water outlet pipe 14 and are all in contact with the water outlet pipe 14. With the help of the contact relationship between the water outlet pipe 14 (the inner side wall of the water flow cavity 11) and the water outlet clamp 5, the water outlet clamp 5 is prevented from being displaced when it is impacted by the fluid, and the water outlet clamp 5 is prevented from unloading the force by moving the body, thereby ensuring that the deformation part 51 of the water outlet clamp 5 can be deformed under force, thereby ensuring the stability of the operation of this embodiment.

[0036] On the basis that the above-mentioned fixed part 52 limits the movement of the water outlet pipe 14 in the linear direction, a limit block 111 for limiting the rotation of the water outlet clamp 5 is provided in the water flow chamber 11. The water outlet clamp 5 includes a limit clamp hole 53. The limit block 111 and the limit clamp hole 53 are interlocked with each other. The projection surface of the limit clamp hole 53 in its axial direction is a polygonal structure. That is, through the mutual interlocking of the limit block 111 and the limit clamp hole 53, the limit block 111 can constrain the water outlet clamp 5 to prevent the water outlet clamp 5 from rotating, so that the various deformation parts 51 of the water outlet clamp 5 can be deformed more stably.

[0037] like Figures 2 and 3 As shown, the deformation portion 51 in this embodiment is arranged at an angle so that the deformation portion 51 can play a role in guiding the fluid. Specifically, the water outlet 131 is located at the end of the deformation portion 51 away from the limiting card hole, and the distance between the end of the deformation portion 51 away from the limiting card hole 53 and the water outlet 131 is greater than the distance between the end of the deformation portion 51 close to the limiting card hole 53 and the water outlet 131, so that the fluid can quickly pass through the gap between the deformed deformation portion 51 and the water outlet 131, thereby improving the water outlet efficiency of this embodiment.

[0038] like Figure 3 As shown, a limiting structure 4 for limiting the sliding distance of the sliding rod 31 is provided between the isolation plate 13 and the sliding rod 31 in this embodiment, which effectively prevents the water inlet piston 3 from separating from the isolation plate 13 in its moving direction, thereby ensuring the stability of the overall structure of this embodiment.

[0039] Specifically, the limiting structure 4 includes a limiting slide hole 41 and a limiting body 42, wherein the limiting body 42 and the sliding rod 31 are integrally formed to ensure that the limiting structure 4 can play a limiting role on the water inlet piston 3, and the limiting slide hole 41 is opened on the isolation plate 13, and the sliding rod 31 is slidably connected to the limiting slide hole 41, and the diameter of the limiting slide hole 41 at one end close to the air drum 122 is smaller than the diameter of the end of the limiting slide hole 41 away from the air drum 122. Preferably, the longitudinal section of the limiting slide hole 41 should be a stepped shaft structure, that is, after the sliding rod 31 moves to a certain distance, the limiting body 42 located on its circumferential surface will abut against the limiting slide hole 41, thereby completing the limiting work; in the other linear direction, since the diameter of the baffle plate 32 itself is larger than the diameter of the limiting slide hole 41, the mutual cooperation between the baffle plate 32 and the limiting body 42 can achieve constraint in the axial direction of the sliding rod 31.

[0040] The longitudinal section of the limiting body 42 is a circular structure, which reduces the contact area between the limiting body 42 and the limiting sliding hole 41, thereby reducing the friction generated by the contact between the limiting body 42 and the limiting sliding hole 41 during the sliding process and improving the service life of the limiting body 42.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A non-return diaphragm pump, comprising a pump body (1) and a drive motor (2), wherein the pump body (1) comprises a water flow chamber (11) and a drive chamber (12), an isolation plate (13) is provided between the water flow chamber (11) and the drive chamber (12), an air drum frame (121) and an air drum (122) are provided in the drive chamber (12), the air drum (122) and the air drum frame (121) are linked, and the air drum frame (121) is linked to the output shaft of the drive motor (2), characterized in that: The isolation plate (13) is provided with a water outlet (131) and a plurality of water inlets (132); the air drum (122) includes a deformation chamber (1221); the water outlet (131) and each water inlet (132) are located in the deformation chamber (1221); the water flow chamber (11) is provided with a water outlet pipe (14); the water outlet pipe (14) is in communication with the water outlet (131); A water inlet piston (3) is provided on the isolation plate (13), and the water inlet piston (3) comprises a sliding rod (31) and a shielding plate (32) for covering each water inlet (132). The sliding rod (31) is slidably connected to the isolation plate (13), and a limiting structure (4) for limiting the sliding distance of the sliding rod (31) is provided between the isolation plate (13) and the sliding rod (31).

2. The non-return diaphragm pump according to claim 1, characterized in that: The sliding rod (31) and the shielding plate (32) are integrally formed, the water inlet piston (3) is made of elastic material, and the shielding plate (32) is an arc-shaped structure.

3. The non-return diaphragm pump according to claim 1 or 2, characterized in that: The limiting structure (4) includes a limiting sliding hole (41) and a limiting body (42). The limiting body (42) and the sliding rod (31) are integrally formed. The limiting sliding hole (41) is opened on the isolation plate (13), and the diameter of the end of the limiting sliding hole (41) close to the air drum (122) is smaller than the diameter of the end of the limiting sliding hole (41) away from the air drum (122). The sliding rod (31) is slidably connected in the limiting sliding hole (41).

4. The check diaphragm pump according to claim 1, characterized in that: The air drums (122) are provided with a plurality of them, each of which is evenly distributed around the driving motor (2) in a circular pattern, and a connecting plate (1222) is provided between each of the air drums (122). The isolation plate (13) is provided with a water inlet piston (3), a water outlet (131), and a plurality of water inlets (132) at each of the air drums (122), and each of the water outlets (131) is communicated with a water outlet pipe (14).

5. The non-return diaphragm pump according to claim 1 or 4, characterized in that: A water outlet clamp (5) is provided between the water outlet (131) and the water outlet pipe (14). The water outlet clamp (5) comprises a plurality of deformable portions (51) and a plurality of fixed portions (52). Each of the deformable portions (51) is located between adjacent fixed portions (52) and corresponds one-to-one to each water outlet (131). Each of the fixed portions (52) is evenly distributed around the water outlet pipe (14) and abuts against the water outlet pipe (14). The deformable portions (51) are made of elastic material.

6. The non-return diaphragm pump according to claim 5, characterized in that: A limiting block (111) for limiting the rotation of the water outlet clamp (5) is provided in the water flow cavity (11); the water outlet clamp (5) includes a limiting clamp hole (53); the limiting block (111) and the limiting clamp hole (53) are interlocked; and the projection surface of the limiting clamp hole (53) in its axial direction is a polygonal structure.

7. The check diaphragm pump according to claim 6, characterized in that: The deformable portion (51) is arranged obliquely, and the water outlet (131) is located at an end of the deformable portion (51) away from the limiting clamping hole, and the distance between the end of the deformable portion (51) away from the limiting clamping hole (53) and the water outlet (131) is greater than the distance between the end of the deformable portion (51) close to the limiting clamping hole (53) and the water outlet (131).

8. The check diaphragm pump according to claim 3, characterized in that: The longitudinal section of the limiting body (42) is a circular structure.

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