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CN-121993645-A - Memory alloy controlled pneumatic valve body

CN121993645ACN 121993645 ACN121993645 ACN 121993645ACN-121993645-A

Abstract

The invention relates to the technical field of pneumatic control equipment and discloses a memory alloy controlled pneumatic valve body which comprises a valve shell and a valve core assembly, wherein a gas cavity is formed in the valve shell and comprises a first cavity, a second cavity and a gas distribution channel, the first cavity is provided with a gas inlet, a one-way check valve assembly is arranged in the first cavity, the second cavity is provided with a gas outlet, a gas outlet and a gas distribution port, the valve core assembly comprises a valve core, the valve core stretches into the gas cavity, a first sealing element and a second sealing element are arranged on the valve core, a first elastic reset element is arranged between the valve core and the valve shell, the first sealing element seals the gas outlet when the valve core is in a first state, the gas outlet is communicated with the gas outlet when the valve core is switched to a second state, and the second sealing element seals the gas distribution port. The number of the memory alloy wires adopted by the pneumatic valve body is small, the cost can be well controlled, and compared with electronic products, the adopted mechanical structures such as the one-way check valve assembly, the valve core and the first sealing body have obvious service life improvement.

Inventors

  • ZHANG HAITAO
  • YANG JIE

Assignees

  • 安闻科技集团股份有限公司

Dates

Publication Date
20260508
Application Date
20260331

Claims (10)

  1. 1. The utility model provides a memory alloy controlled pneumatic valve body which characterized in that includes valve casing (1) and case subassembly: The inside gas chamber (2) that forms of valve casing (1), valve casing (1) are equipped with case through-hole, wherein: The gas chamber (2) comprises a first cavity (21), a second cavity (22) and a gas distribution channel (24) for communicating the first cavity (21) with the second cavity (22), wherein the first cavity (21) is provided with a gas inlet (11) for communicating with a gas source, a one-way check valve assembly (3) is arranged in the first cavity (21), the one-way check valve assembly (3) is used for enabling a gas path of the gas inlet (11) to be conducted to the side of the second cavity (22) in a one-way mode, and the second cavity (22) is provided with a gas outlet (12) for communicating with a gas utilization unit, a gas outlet (13) for communicating with the outside and a gas distribution port for communicating with the gas distribution channel (24); The valve core assembly comprises a valve core (4) controlled by a memory alloy wire (5), a first end of the valve core (4) stretches into the gas chamber (2) from a valve core through hole, the peripheral wall of the valve core (4) is in dynamic seal fit with the valve core through hole, a first sealing element (411) and a second sealing element (412) are arranged on the valve core (4), a first elastic reset element (42) is arranged between the valve core (4) and the valve housing (1), when the valve core (4) is in a first state, the first elastic reset element (42) is used for enabling the first sealing element (411) to seal the gas outlet (13), and when the valve core (4) is switched to a second state under the control of the memory alloy wire (5), the first sealing element (411) releases the sealing of the gas outlet (13) so that the gas outlet (12) is communicated with the gas outlet (13), and the second sealing element (412) seals the gas outlet.
  2. 2. A memory alloy controlled pneumatic valve body as claimed in claim 1, characterized in that the valve housing (1) has a flap assembly (14) therein extending into the gas chamber (2), the flap assembly (14) cooperating with the valve housing (1) to form the first cavity (21), at least one of the second cavities (22) and the gas distribution channel (24) in the gas chamber (2).
  3. 3. The memory alloy controlled pneumatic valve body according to claim 1, wherein in the second cavity (22), the exhaust port (13) is opposite to the air distribution port, a first sealing element (411) and a second sealing element (412) arranged on the valve core (4) are positioned between the exhaust port (13) and the air distribution port, when the valve core (4) is in a first state, the first sealing element (411) seals the exhaust port (13), a gap is formed between the second sealing element (412) and the air distribution port, and when the valve core (4) drives the second sealing element (412) to be tightly attached to the air distribution port under the action of a memory alloy wire (5), a gap is formed between the first sealing element (411) and the exhaust port (13) so as to release the sealing of the exhaust port (13).
  4. 4. A memory alloy controlled pneumatic valve body as claimed in claim 3, wherein the valve element (4) extends in the arrangement direction of the exhaust port (13) and the gas distribution port, the valve element (4) is slidably inserted into the second chamber (22) in the longitudinal direction thereof, and the first seal (411) and the second seal (412) are located between the exhaust port (13) and the gas distribution port.
  5. 5. The memory alloy controlled pneumatic valve body according to claim 4, wherein a third cavity (23) is formed in the air distribution channel (24), the valve core through hole is formed on the side wall of the third cavity (23), the valve core (4) penetrates through the third cavity (23) and stretches into the second cavity (22) from the air distribution port, the first sealing piece (411) is arranged at the end part of the first end of the valve core (4), an annular air gap is formed between the peripheral wall of the valve core (4) and the inner wall of the air distribution port, the second sealing piece (412) is an annular sealing ring and is sleeved on the valve core (4), and when the valve core (4) is in the second state, the annular sealing ring seals the annular air gap.
  6. 6. The memory alloy controlled pneumatic valve body according to claim 5, wherein a caulking groove opening toward the exhaust port (13) is formed on a surface of the first end of the valve core (4), the first sealing member (411) is embedded in the caulking groove, an annular groove is formed in a peripheral wall of the valve core (4), and the second sealing member (412) is sleeved in the annular groove.
  7. 7. The memory alloy controlled pneumatic valve body according to claim 4, wherein a third cavity (23) is formed in the air distribution channel (24), the valve core through hole is formed on the side wall of the third cavity (23), the valve core (4) passes through the third cavity (23) and stretches into the second cavity (22) from the air distribution port, the first sealing element (411) and the second sealing element (412) have an integrated structure so as to form a first sealing element (41), a fixing part is formed on the part of the valve core (4) located in the second cavity (22), the diameter of the fixing part is larger than the diameter of the air distribution port, a clamping groove is formed in the center of the fixing part, the first sealing element (41) is arranged in the clamping groove, the part facing the air outlet (13) forms the first sealing element (411), and the part far away from the air outlet (13) forms the second sealing element (412).
  8. 8.A memory alloy controlled pneumatic valve body as claimed in claim 3, wherein the valve opening is located on one side of the valve element (4) along a length direction perpendicular to the valve element (4), a portion of the valve element (4) extending into the second cavity (22) is provided with a pulling member (43) extending toward the direction of the valve opening, the first sealing member (411) is disposed at an end portion of the first end of the valve element (4), and the second sealing member (412) is disposed on the pulling member (43).
  9. 9. A memory alloy controlled pneumatic valve body as claimed in claim 3, wherein the direction of arrangement of the exhaust port (13) and the air distribution port is perpendicular to the length direction of the valve element (4), wherein: The valve body (41) is arranged at the position, located in the second cavity (22), of the valve core (4) and penetrates through the valve core (4) along the arrangement direction of the exhaust port (13) and the air distribution port, the first sealing piece (411) is arranged on the valve core (4) through the through hole, a supporting part is formed at the position, corresponding to the middle part of the valve housing (1) and the valve core (4), of the valve housing (1) and is matched with the supporting part to form a lever assembly, when the valve core (4) is in a first state, the valve core (4) presses the first sealing piece (41) on the exhaust port (13) under the action force of the first elastic reset piece (42), the air distribution port is relieved, when the second end of the valve core (4) swings downwards under the pulling of the memory alloy wire (5), the valve core (4) is controlled to be switched from the first state to the second state, and then the valve core (4) is pressed against the first sealing piece (41) and the air distribution port (13) is relieved.
  10. 10. A memory alloy controlled pneumatic valve body as claimed in any one of claims 1 to 9, wherein the one-way check valve assembly (3) comprises a sealing block and a second resilient return member disposed between the sealing block and a side wall of the first cavity (21) for providing a force against the air inlet to the sealing block, the sealing block sealing the air inlet (11) when the one-way check valve assembly (3) is in a first state, the air inlet (11) being open when the one-way check valve assembly (3) is in a second state so that high pressure gas can enter the gas chamber (2), the one-way check valve assembly (3) being normally in the first state and being switchable from the first state to the second state under the action of external high pressure gas.

Description

Memory alloy controlled pneumatic valve body Technical Field The application relates to the technical field of pneumatic control equipment, in particular to a memory alloy controlled pneumatic valve body. Background In the field of automobiles, the comfort of a vehicle seat is always pursued by people, and the massage function of the vehicle seat gradually becomes a focus of attention when people buy the automobile, and the massage function can massage passengers in the use process of the vehicle, so that the fatigue of people in the journey is reduced. However, the massage modules in the market mostly adopt massage modules such as electromagnetic massage, which are expensive and have short service lives, so in order to solve the problems, we provide a pneumatic valve body. Disclosure of Invention In view of the foregoing drawbacks or shortcomings in the prior art, the present application is directed to a memory alloy controlled pneumatic valve body. In order to achieve the above purpose, the present invention provides the following technical solutions: In a first aspect, the present application provides a memory alloy controlled pneumatic valve body comprising a valve housing and a valve core assembly, wherein: a gas chamber is formed in the valve housing, and a valve core through hole is formed in the valve housing; The gas cavity comprises a first cavity, a second cavity and a gas distribution channel used for communicating the first cavity with each second cavity, wherein the first cavity is provided with a gas inlet used for communicating with a gas source, a one-way check valve assembly is arranged in the first cavity and used for enabling a gas path of the gas inlet to be conducted unidirectionally towards the second cavity; The valve core assembly comprises a valve core controlled by a memory alloy wire, a first end of the valve core stretches into the gas chamber from the valve core through hole, the peripheral wall of the valve core is in dynamic seal fit with the valve core through hole, a first sealing element and a second sealing element are arranged on the valve core, a first elastic reset element is arranged between the valve core and the valve shell, when the valve core is in a first state, the first elastic reset element is used for enabling the first sealing element to seal the gas outlet, when the valve core is switched to a second state under the control of the memory alloy wire, the first sealing element releases the sealing of the gas outlet, so that the gas outlet is communicated with the gas outlet, and the second sealing element seals the gas distribution port. According to the pneumatic valve body provided by the technical scheme, the air inlet, the first cavity, the air distribution channel, the second cavity, the air outlet and the like of the first cavity in the valve shell can form the air channel which can be connected to the air utilization unit, the air utilization unit can be an air bag, when the air bag is generally used as a massage unit, the air bag has three working states which are respectively in inflation, pressure maintaining and air leakage states, the pneumatic valve body provided by the technical scheme can realize the switching of the air bag between the three states only through the valve core controlled by the memory alloy wire and the one-way check valve component, when the valve core is in the first state under the action of the first elastic reset piece, the first sealing piece arranged on the valve core can seal the air outlet of the second cavity, at the moment, the one-way check valve component releases the blocking of the air inlet of the first cavity, high-pressure air in the air source enters the first cavity through the air inlet, the air in the first cavity enters the corresponding second cavity through the air distribution channel and the air inlet, and then enters the corresponding air bag through the air outlet of the second cavity, and the one-way check valve component is used for sealing the air bag after the air is in the state; when the air bag is required to be switched from a pressure maintaining state to an air leakage state, the corresponding memory alloy wire is electrified, the valve core is pulled when the memory alloy wire is contracted after the memory alloy wire is electrified, the valve core is switched to a second state after overcoming the acting force of the first elastic resetting piece, at the moment, the second sealing piece arranged on the valve core seals the air distribution port of the second chamber, meanwhile, the first sealing piece releases the sealing of the air outlet, the air bag is communicated with the air outlet through the air outlet of the second chamber, the air in the air bag is discharged through the air outlet, the air bag is switched to the air release state, and the massage function can be realized in the switching process of the air bag in the air inflation state, the pressure maintaining state and the