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CN-224228827-U - Low pulsation diaphragm pump

CN224228827UCN 224228827 UCN224228827 UCN 224228827UCN-224228827-U

Abstract

The application provides a low-pulsation diaphragm pump, and relates to the technical field of diaphragm pumps. The low-pulsation diaphragm pump comprises a pump cavity shell, a pump body, a driving mechanism, a suction buffer diaphragm and a discharge buffer diaphragm. The pump comprises a pump cavity shell, a pump body, a driving mechanism, a suction buffer membrane and a discharge buffer membrane, wherein the pump cavity shell is internally provided with a suction buffer cavity and a discharge buffer cavity, the suction buffer cavity is communicated with the discharge buffer cavity, the pump cavity shell is connected with the pump cavity shell, the driving mechanism is connected with the pump body and is used for driving fluid media to enter the discharge buffer cavity from the suction buffer cavity, the suction buffer membrane is connected in the suction buffer cavity and is used for buffering the fluid media entering the suction buffer cavity, the discharge buffer membrane is connected in the discharge buffer cavity, and the discharge buffer membrane is used for buffering the fluid media entering the discharge buffer cavity. The application can reduce the pulsation of fluid medium, reduce noise, reduce space occupation and have higher integration level.

Inventors

  • LIU HAO

Assignees

  • 卡川尔流体科技(上海)有限公司

Dates

Publication Date
20260512
Application Date
20250517

Claims (10)

  1. 1. A low pulsation diaphragm pump comprising: A pump cavity shell (1), wherein a suction buffer cavity (16) and a discharge buffer cavity (17) are arranged in the pump cavity shell (1), and the suction buffer cavity (16) is communicated with the discharge buffer cavity (17); The pump body (2), the pump cavity shell (1) is connected with the pump body (2); the driving mechanism (3) is connected with the pump body (2), and the driving mechanism (3) is used for driving a fluid medium to enter the discharging buffer cavity (17) from the sucking buffer cavity (16); A suction buffer membrane (6), the suction buffer membrane (6) being connected within the suction buffer chamber (16), the suction buffer membrane (6) providing a buffer for fluid medium entering the suction buffer chamber (16); -a discharge-damping membrane (7), said discharge-damping membrane (7) being connected in said discharge-damping chamber (17), said discharge-damping membrane (7) damping a fluid medium entering said discharge-damping chamber (17).
  2. 2. A low pulsation membrane pump according to claim 1, characterized in that the pump chamber housing (1) comprises a valve upper plate (11) and an upper cover (12), the valve upper plate (11) and the upper cover (12) being detachably connected, the valve upper plate (11) and the upper cover (12) clamping the edges of the suction buffer membrane (6).
  3. 3. A low pulsation membrane pump according to claim 2, characterized in that the pump chamber housing (1) further comprises a pillar (15), the pillar (15) being connected to the valve upper plate (11), the pillar (15) being located in the suction buffer chamber (16), the pillar (15) and the upper cover (12) being located on both sides of the suction buffer membrane (6), respectively, the pillar (15) being adapted to support the suction buffer membrane (6).
  4. 4. A low pulsation membrane pump according to claim 2, characterized in that the pump chamber housing (1) further comprises a lower shell (14), the lower shell (14) being detachably connected to the valve upper plate (11), the lower shell (14) clamping the edge of the discharge-buffering membrane (7) with the valve upper plate (11).
  5. 5. A low pulsation membrane pump according to claim 4, characterized in that the valve upper plate (11) is connected with supporting ribs (18), the supporting ribs (18) being provided in plurality, the plurality of supporting ribs (18) being connected with the outer wall of the suction buffer chamber (16).
  6. 6. A low pulsation membrane pump according to claim 4, characterized in that a damping chamber (141) is provided in the lower casing (14), the damping chamber (141) accommodating an elastic element (19), the elastic element (19) being in abutment with the discharge buffer membrane (7).
  7. 7. The low pulsation diaphragm pump according to claim 6, wherein said lower casing (14) is provided with a small air hole (142), said small air hole (142) communicating said damping chamber (141) with the outside.
  8. 8. A low pulsation membrane pump according to claim 2, characterized in that the pump chamber housing (1) further comprises a valve lower plate (13), the valve lower plate (13) being detachably connected to the valve upper plate (11), the driving mechanism (3) comprising a valve plate (35), the valve upper plate (11) and the valve lower plate (13) sandwiching the valve plate (35), the valve plate (35) allowing the fluid medium in the suction buffer chamber (16) to flow into the discharge buffer chamber (17).
  9. 9. A low pulsation membrane pump according to claim 2, characterized in that the driving mechanism (3) further comprises a motor (31), an eccentric wheel (32), a connecting rod (33) and a membrane sheet (34), the body of the motor (31) is connected with the pump body (2), the eccentric wheel (32) is connected with an output shaft of the motor (31), the connecting rod (33) is sleeved outside the eccentric wheel (32), the membrane sheet (34) is connected with the connecting rod (33), the membrane sheet (34) is installed between the pump cavity shell (1) and the pump body (2), and the motor (31) drives the membrane sheet (34) to reciprocate through the eccentric wheel (32) and the connecting rod (33), so that fluid medium enters the discharge buffer cavity (17) from the suction buffer cavity (16).
  10. 10. A low pulsation membrane pump according to claim 9, characterized in that the pump body (2) comprises a support shell (21) and an end plate (22), the support shell (21) and the end plate (22) being detachably connected, the drive mechanism (3) further comprises a first bearing (36) and a second bearing (37), the first bearing (36) being arranged between the connecting rod (33) and the eccentric (32), the second bearing (37) being arranged between the end plate (22) and the output shaft of the motor (31).

Description

Low pulsation diaphragm pump Technical Field The application relates to the technical field of diaphragm pumps, in particular to a low-pulsation diaphragm pump. Background The diaphragm pump drives the diaphragm to reciprocate through the driving mechanism, changes the volume of the pump cavity to form negative pressure to suck the fluid medium, and then discharges the fluid medium through positive pressure. In the field of diaphragm pumps, the suction and discharge of fluid is also periodic due to the nature of the periodic reciprocation of the diaphragm, thereby creating flow and pressure pulsations. Such pulsations tend to cause wear of the components of the transmission system, produce noise and vibration, cause additional energy loss, reduce the delivery flow, and high pressure pulsations also produce small bubbles or foam, affecting the transmission medium. In the related art, a double-head pump or a multi-head pump is generally adopted to work alternately, or a pulsation damper is additionally arranged, but the volume occupied by the diaphragm pump is often greatly increased. Disclosure of utility model In order to reduce pulsation of a fluid medium, reduce noise, reduce space occupation and have higher integration level, the application provides a low-pulsation diaphragm pump. The application provides a low-pulsation diaphragm pump, which adopts the following technical scheme: A low pulsation diaphragm pump comprising: the pump cavity shell is internally provided with a suction buffer cavity and a discharge buffer cavity, and the suction buffer cavity is communicated with the discharge buffer cavity; The pump body is connected with the pump cavity shell; The driving mechanism is connected with the pump body and is used for driving a fluid medium to enter the discharging buffer cavity from the sucking buffer cavity; the suction buffer membrane is connected in the suction buffer cavity and used for buffering fluid media entering the suction buffer cavity; The discharge buffer membrane is connected in the discharge buffer cavity and provides buffer for fluid medium entering the discharge buffer cavity. By adopting the technical scheme, the suction buffer membrane and the discharge buffer membrane can elastically deform, so that the suction buffer membrane can buffer fluid media entering the suction buffer cavity, thereby effectively reducing flow and pressure pulsation in the suction process, and the discharge buffer membrane can buffer the fluid media entering the discharge buffer cavity, and further reduce pulsation in the discharge process. The suction buffer membrane and the discharge buffer membrane act together, so that the pulsation of the diaphragm pump during operation can be reduced, the abrasion, noise and vibration of system components are reduced, and the stability of conveying flow is improved. Optionally, the pump chamber housing includes a valve upper plate and an upper cover, the valve upper plate and the upper cover are detachably connected, and the valve upper plate and the upper cover clamp edges of the suction buffer membrane. Through adopting above-mentioned technical scheme, the installation and the maintenance of inhaling the buffering diaphragm of being convenient for of detachable connection design of valve upper plate and upper cover, the edge of inhaling the buffering diaphragm is held to valve upper plate and upper cover, can ensure to inhale the buffering diaphragm and stabilize fixedly in the course of the work, reduces and inhales the buffering diaphragm and appear the condition that displacement or drops at the during operation to effectively guarantee the buffering effect of inhaling the fluid medium in the buffering chamber, reduce flow and pressure pulsation. Optionally, the pump chamber housing further includes a support, the support is connected with the valve upper plate, the support is located in the suction buffer chamber, the support and the upper cover are located at two sides of the suction buffer membrane respectively, and the support is used for supporting the suction buffer membrane. Through adopting above-mentioned technical scheme, the pillar sets up in inhaling the cushion chamber and provides the supporting role to inhaling the cushion film piece, can effectively improve and inhale the cushion film piece and take place the condition of damaging because of the atress is excessive in the course of the work, improves the working life who inhales the cushion film piece to guarantee to inhale the cushion film piece and provide the cushioning effect to the fluid medium that gets into the suction cushion chamber steadily. Optionally, the pump chamber housing further includes a lower case detachably connected to the valve upper plate, and the lower case and the valve upper plate clamp edges of the discharge buffer membrane. Through adopting above-mentioned technical scheme, the inferior valve can be convenient for install and maintain the discharge buffering d