CN110608144A - Light bellows type thermal expansion driving device - Google Patents
Light bellows type thermal expansion driving device Download PDFInfo
- Publication number
- CN110608144A CN110608144A CN201911009021.9A CN201911009021A CN110608144A CN 110608144 A CN110608144 A CN 110608144A CN 201911009021 A CN201911009021 A CN 201911009021A CN 110608144 A CN110608144 A CN 110608144A
- Authority
- CN
- China
- Prior art keywords
- thermal expansion
- corrugated pipe
- pipe body
- groove
- bellows
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims abstract description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- 229910052802 copper Inorganic materials 0.000 claims description 12
- 239000010949 copper Substances 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 abstract description 14
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 239000012188 paraffin wax Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000012782 phase change material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/002—Actuating devices; Operating means; Releasing devices actuated by temperature variation
Abstract
A light bellows type thermal expansion driving device belongs to the field of thermal expansion braking, and comprises a bellows body, a top cover, a sealing gasket and a thermal expansion medium; the device novel structure, the theory of operation is clear, and the bellows body both can regard as the temperature sensing body of filling the thermal expansion medium in the device, can regard as the elastic element directly to experience the volume change of thermal expansion medium directly to turn into displacement volume output again, can rely on the expend with heat and contract with cold nature of thermal expansion medium to realize the shrink and the extension of bellows to drive the inside push rod of temperature-sensing valve backward and forward displacement, realize heat energy and mechanical energy's conversion, can realize the output of maximum displacement volume.
Description
Technical Field
The invention belongs to the field of thermal expansion braking, relates to a thermal expansion driving device, and particularly relates to a light corrugated pipe type thermal expansion driving device for converting thermal energy and mechanical energy by using thermal expansion and cold contraction.
Background
At present, the field of thermal expansion braking is very wide, such as a temperature control valve which is widely applied to the control of working medium temperature and flow in various thermal equipment. The thermal expansion actuator as a core component of the thermostatic valve determines the performance of the thermostatic valve. One type of self-operated thermal expansion actuator that is currently in widespread use is a paraffin bulb, which consists of a bulb body, paraffin, a push rod, and rubber. The temperature sensing bulb has excellent performance in the micro-driving (less than 5mm) field, but appears to be very popular in the large displacement (more than 10mm) driving field, because the displacement caused by thermal expansion is determined not only by the thermophysical parameters of the thermal expansion medium (such as paraffin) but also by the body and internal structure of the thermal expansion driver. The conventional thermal expansion actuator, i.e. the main body of the thermal bulb, is composed of a copper container, an expansion medium such as paraffin is filled in the container, and when the expansion medium expands to fill the container, the outward driving displacement stops. In addition, because the body of the driver cannot stretch out and draw back, huge pressure is born in the thermal expansion driver at the rear section of the expansion period, and in order to ensure the safety and the reliability of the driver, the driver body usually adopts metal with larger thickness, so that the weight of the driver is larger, and the sealing process is stricter and more difficult. Nowadays, especially some industrial fields, the demand to big displacement drive is great, and the original way is to install mechanical structure such as displacement amplifier additional in temperature-sensing valve inside, has not only increased the cost of manufacture, has also improved the complexity of product, and its operational reliability reduces by a wide margin, consequently needs to design a thermal energy drive arrangement to satisfy the demand of using.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a light bellows type thermal expansion driving device, wherein a bellows can be used as a temperature sensing body filled with a thermal expansion medium and also can be used as an elastic element to directly sense the volume change of the thermal expansion medium and directly convert the volume change into displacement output, so that the output of larger displacement can be realized, and the backward and forward displacement of a push rod in a temperature control valve is driven, and the conversion of heat energy and mechanical energy is realized.
The technical scheme of the invention is as follows: a lightweight bellows-type thermal expansion drive device characterized by: the driving device consists of a corrugated pipe body, a top cover, a sealing gasket and a thermal expansion medium; the utility model discloses a corrugated pipe body, including corrugated pipe body, top cap, heat expansion medium, sealing gasket, corrugated pipe body, the surface equipartition of corrugated pipe body is equipped with a plurality of U type groove, the inside of corrugated pipe body is hollow structure, the heat expansion medium fills the setting and is in the hollow structure, the bottom of corrugated pipe body is seal structure, the top of corrugated pipe body is equipped with the opening, the top cap sets up the opening outside, the front of top cap is equipped with the push rod, the back of top cap is equipped with the recess, be equipped with sealed the pad in the recess.
The groove bottom of the U-shaped groove and the groove top of the U-shaped groove are both semicircular, and the radius of the groove bottom of the U-shaped groove is larger than that of the groove top of the U-shaped groove.
The corrugated pipe body is made of red copper materials.
The top end of the corrugated pipe body bends and fits a metal copper edge with a vertical top end on the upper surface of the top cover through a stamping type press, and the corrugated pipe body and the sealing gasket jointly act to generate strong pressure to guarantee sealing.
The corrugated pipe body changes the expansion amount through the change of the temperature of the surrounding medium, and the thermal expansion amount is as follows: Δ l ═ al0Δ T, where a is the linear expansion coefficient of the thermal expansion medium,/0As an initial length, Δ T is the temperature change amount.
The invention has the beneficial effects that: the light corrugated pipe type thermal expansion driving device provided by the invention has the advantages that the structure is novel, the working principle is clear, and the driving device consists of a corrugated pipe body, a top cover, a sealing gasket and a thermal expansion medium; the corrugated pipe body in the device can be used as a temperature sensing body for filling a thermal expansion medium and can also be used as an elastic element for directly sensing the volume change of the thermal expansion medium and directly converting the volume change into displacement output, and the contraction and the stretching of the corrugated pipe can be realized by depending on the thermal expansion and contraction properties of the thermal expansion medium, so that the backward and forward displacement of the push rod in the temperature control valve is driven, the conversion of heat energy and mechanical energy is realized, and the output of the maximum displacement can be realized.
Drawings
Fig. 1 is a schematic view of the overall structure of the driving device of the present invention.
FIG. 2 is a schematic structural diagram of the driving device of the present invention in an unsealed state.
Fig. 3 is an exploded view of the driving device of the present invention.
Fig. 4 is a schematic view of the driving device of the present invention.
In the figure: the device comprises a top cover 1, a push rod 11, a groove 12, a corrugated pipe body 2, a sealing gasket 3 and a thermal expansion medium 4.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
as shown in fig. 1-4, a light bellows type thermal expansion driving device is composed of a bellows body 2, a top cover 1, a sealing gasket 3 and a thermal expansion medium 4; the surface equipartition of bellows body 2 is equipped with a plurality of U type groove, the inside of bellows body 2 is hollow structure, thermal expansion medium 4 fills and sets up in hollow structure, the bottom of bellows body 2 is seal structure, the top of bellows body 2 is equipped with the opening, top cap 1 sets up in the opening outside, top cap 1's front is equipped with push rod 11, top cap 1's back is equipped with recess 12, be equipped with sealed 3 of filling up in the recess 12, top cap 1 forms sealing connection through sealed 3 of filling up and the top of bellows body 2.
As shown in fig. 1-4, in a lightweight bellows-type thermal expansion driving device, the bottom of a U-shaped groove and the top of the U-shaped groove are both semicircular, and the radius of the bottom of the U-shaped groove is larger than that of the top of the U-shaped groove; the corrugated pipe body 2 is made of red copper material; the top end of the corrugated pipe body 2 bends the original vertical metal copper on the upper surface of the top cover 1 through a stamping type press, and the metal copper and the sealing gasket 3 jointly act to generate strong pressure to ensure sealing; the corrugated pipe body 2 changes the expansion amount through the change of the temperature of the surrounding medium, and the thermal expansion amount is as follows: Δ l ═ al0Δ T, where a is the linear expansion coefficient of the thermal expansion medium,/0As an initial length, Δ T is the temperature change amount.
As shown in fig. 1-4, a lightweight bellows-type thermal expansion actuator operates as follows: the corrugated pipe body 2 is made of red copper with high thermal conductivity, and the thermal expansion medium filled in the corrugated pipe needs to timely sense the temperature change of an external medium, so that the corrugated pipe body has good thermal conductivity, and the red copper is used as the material, so that the corrugated pipe body has small thermal resistance and good thermal conductivity and temperature sensing sensitivity. The thermal expansion medium 4 is filled in the bellows body 2, and a packing is inserted between the groove 12 at the bottom of the top cover tape pusher 1 and the end of the bellows body 2. After all the parts of the invention are installed, a stamping type press is adopted for sealing, the original vertical metal copper is bent on the upper surface of the top cover, and the metal copper and the sealing gasket jointly act to generate strong pressure so as to ensure sealing. When the bellows thermal expansion impact driver is in operation, the bellows body directly senses changes in the temperature of the surrounding medium. The device is used in various temperature control valves, for example, when the water temperature sensed by a corrugated pipe of the driver is lower than the reference temperature, the driver can recover the shrinkage amount, so as to correspondingly drive the opening degree of the valve inside the temperature control valve to change, for example, the opening degree of a cold water pipe valve is controlled to be smaller, the opening degree of a hot water pipe valve is controlled to be larger, and the water temperature consistent with the reference temperature is obtained through self-adaptive adjustment. The reference temperature is selected in relation to the expansion medium to be filled, for example, the expansion medium is a phase change material, the phase change material will undergo a phase change in a certain temperature interval, for example, melting from a solid state to a liquid state, the density becomes lower during the phase change process, the volume will expand, the filling into the driver will displace, and therefore the reference temperature should be within the temperature interval in which the phase change occurs.
Claims (5)
1. A lightweight bellows-type thermal expansion drive device characterized by: the driving device consists of a corrugated pipe body (2), a top cover (1), a sealing gasket (3) and a thermal expansion medium (4); the utility model discloses a corrugated pipe body, including corrugated pipe body (2), top cap (1), heat expansion medium (4), top cap (1), recess (12), the surface equipartition of corrugated pipe body (2) is equipped with a plurality of U type groove, the inside of corrugated pipe body (2) is hollow structure, heat expansion medium (4) are filled and are set up in the hollow structure, the bottom of corrugated pipe body (2) is seal structure, the top of corrugated pipe body (2) is equipped with the opening, top cap (1) sets up the opening outside, the front of top cap (1) is equipped with push rod (11), the back of top cap (1) is equipped with recess (12), be equipped with sealed pad (3) in recess (12), top cap (1) forms sealing connection through sealed.
2. A lightweight bellows thermal expansion drive as claimed in claim 1, wherein: the groove bottom of the U-shaped groove and the groove top of the U-shaped groove are both semicircular, and the radius of the groove bottom of the U-shaped groove is larger than that of the groove top of the U-shaped groove.
3. A lightweight bellows thermal expansion drive as claimed in claim 1, wherein: the corrugated pipe body (2) is made of red copper materials.
4. A lightweight bellows thermal expansion drive as claimed in claim 1, wherein: the top end of the corrugated pipe body (2) bends and attaches a metal copper edge with a vertical top end on the upper surface of the top cover (1) through a stamping type press, and the corrugated pipe body and the sealing gasket (3) jointly act to generate strong pressure to guarantee sealing.
5. A lightweight bellows thermal expansion drive as claimed in claim 1, wherein: the corrugated pipe body (2) changes the expansion amount through the change of the temperature of the surrounding medium, and the thermal expansion amount is as follows: Δ l ═ al0Δ T, where a is the linear expansion coefficient of the thermal expansion medium,/0As an initial length, Δ T is the temperature change amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911009021.9A CN110608144A (en) | 2019-10-23 | 2019-10-23 | Light bellows type thermal expansion driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911009021.9A CN110608144A (en) | 2019-10-23 | 2019-10-23 | Light bellows type thermal expansion driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110608144A true CN110608144A (en) | 2019-12-24 |
Family
ID=68893351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911009021.9A Pending CN110608144A (en) | 2019-10-23 | 2019-10-23 | Light bellows type thermal expansion driving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110608144A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114261123A (en) * | 2022-03-02 | 2022-04-01 | 南通龙纳模具有限公司 | Press for Roman chair forming die |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2122148C1 (en) * | 1998-01-16 | 1998-11-20 | Закрытое акционерное общество "Теплосеть плюс" | Bellows for compensation of deformation in pipe line |
| KR200242207Y1 (en) * | 2001-05-25 | 2001-10-15 | 주식회사 진흥기공 | Bellows type expansion pipe joint |
| CN110145635A (en) * | 2019-04-29 | 2019-08-20 | 成都聚立峡温控科技有限公司 | A kind of bellows temperature-sensing wax thermostat valve |
| CN210660459U (en) * | 2019-10-23 | 2020-06-02 | 扬州大学 | Light bellows type thermal expansion driving device |
-
2019
- 2019-10-23 CN CN201911009021.9A patent/CN110608144A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2122148C1 (en) * | 1998-01-16 | 1998-11-20 | Закрытое акционерное общество "Теплосеть плюс" | Bellows for compensation of deformation in pipe line |
| KR200242207Y1 (en) * | 2001-05-25 | 2001-10-15 | 주식회사 진흥기공 | Bellows type expansion pipe joint |
| CN110145635A (en) * | 2019-04-29 | 2019-08-20 | 成都聚立峡温控科技有限公司 | A kind of bellows temperature-sensing wax thermostat valve |
| CN210660459U (en) * | 2019-10-23 | 2020-06-02 | 扬州大学 | Light bellows type thermal expansion driving device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114261123A (en) * | 2022-03-02 | 2022-04-01 | 南通龙纳模具有限公司 | Press for Roman chair forming die |
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