CN210860192U - Water-cooling flange with embedded circulating water channel - Google Patents

Water-cooling flange with embedded circulating water channel Download PDF

Info

Publication number
CN210860192U
CN210860192U CN201921922721.2U CN201921922721U CN210860192U CN 210860192 U CN210860192 U CN 210860192U CN 201921922721 U CN201921922721 U CN 201921922721U CN 210860192 U CN210860192 U CN 210860192U
Authority
CN
China
Prior art keywords
water
flange
cylindrical
water tank
cavity
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.)
Active
Application number
CN201921922721.2U
Other languages
Chinese (zh)
Inventor
闫超
赵国华
罗立平
吕绪明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Research Institute of Physical and Chemical Engineering of Nuclear Industry
Original Assignee
Research Institute of Physical and Chemical Engineering of Nuclear Industry
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Research Institute of Physical and Chemical Engineering of Nuclear Industry filed Critical Research Institute of Physical and Chemical Engineering of Nuclear Industry
Priority to CN201921922721.2U priority Critical patent/CN210860192U/en
Application granted granted Critical
Publication of CN210860192U publication Critical patent/CN210860192U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

The utility model discloses a water-cooling flange with embedded circulating water path, which comprises a cylindrical flange with an annular water tank cavity, and a cylindrical water cover covered on the cylindrical flange, wherein the inner ring of the cylindrical flange is connected with a flange sleeve, the cylindrical cavity arranged inside the flange sleeve is communicated with the annular water tank cavity, and the flange sleeve and the cylindrical flange are coaxially arranged; one end of the cylindrical flange is connected with a water inlet in a penetrating mode, the other end of the cylindrical flange is connected with a water outlet in a penetrating mode, and water flowing through the water inlet flows out through the cylindrical flange, the cylindrical water cover and the water outlet, so that water-cooling is achieved.

Description

Water-cooling flange with embedded circulating water channel
Technical Field
The utility model belongs to the technical field of the flange, especially, relate to a water-cooling flange with embedded circulation water route.
Background
In the use environment of the partial vacuum device, local high temperature and undesirable heat dissipation conditions can occur, the device can be failed, malfunction and damaged for a long time, and even more, economic property loss and personnel injury can be caused. There is therefore a need for effective measures against such local thermal effects of vacuum equipment. The general vacuum equipment tank body is provided with an embedded or externally added cooling water channel to prevent the vacuum tank body from temperature rise and heat accumulation under related heating experiments, but the number of the cooling water channels arranged on the vacuum tank body is limited, so that all parts of the vacuum tank body cannot be considered, and the heat accumulation can occur at certain flange interfaces and other positions. If the heat of flange department can not in time be taken away, then can cause the appearance of the condition such as flange sealing rubber deformation inefficacy, glass observation window explode and split, mechanical structure part failure.
At present, aiming at the heat dissipation of the flange of the vacuum tank body, a three-dimensional radiating fin is attached to the surface of the flange or an annular cooling water channel is added on the outer ring of the flange. However, such methods have limited cooling effect and cannot meet the requirements of long time, large heat and rapid transfer. The two methods only depend on the fact that the heat dissipation structure is additionally arranged on the surface of the flange to indirectly take away the heat radiated to the flange position in the vacuum device, the efficiency is low, and the situation that the temperature at the position of the vacuum flange is too high cannot be really solved. The cooling of the vacuum flange used at the present stage is shown in fig. 1.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a water-cooling flange with embedded circulation water route to solve the problem of background art.
In order to achieve the above object, the utility model discloses a water-cooling flange with embedded circulation water route's concrete technical scheme as follows:
a water-cooling flange with an embedded circulating water channel comprises a cylindrical flange with an annular water channel cavity and a cylindrical water cover covering the cylindrical flange, wherein a flange sleeve is connected to the inner ring of the cylindrical flange, a cylindrical cavity formed in the flange sleeve is communicated with the annular water channel cavity, and the flange sleeve and the cylindrical flange are coaxially arranged;
one end of the cylindrical flange is connected with a water inlet in a penetrating mode, the other end of the cylindrical flange is connected with a water outlet in a penetrating mode, and water flowing through the water inlet flows out through the cylindrical flange, the cylindrical water cover and the water outlet, so that water-cooling is achieved.
Further, the flange sleeve comprises a cylinder plug, an outer water jacket and an inner water jacket; an inner water jacket is inserted in the outer water jacket, a cylindrical cavity for water to flow is formed between the outer water jacket and the inner water jacket, and the end parts of the outer water jacket and the inner water jacket are sealed through cylindrical water covers.
Further, flange sleeve is inside still to establish two section of thick bamboo water fender, and the length that every section of thick bamboo water kept off is in flange sleeve's length to make the both ends that a section of thick bamboo water kept off all form a section of thick bamboo water breach, and two section of thick bamboo water keep off the cylindrical cavity one in with flange sleeve and divide into the half cylindrical cavity of two mutual intercommunications, the intercommunication each other of two half cylindrical cavities is realized to a section of thick bamboo water breach.
Furthermore, a first cylinder water baffle and a second cylinder water baffle are connected in the annular water tank cavity of the cylinder flange, so that the annular water tank cavity is divided into a left semi-ring water tank cavity and a right semi-ring water tank cavity, the left semi-ring water tank cavity is communicated with the water inlet, and the right semi-ring water tank cavity is communicated with the water outlet.
Furthermore, a left semicircular water retaining strip is connected in the left semicircular water tank cavity and divides the left semicircular water tank cavity into a left half inner water tank and a left half outer water tank which are communicated with each other;
the right semicircular water tank cavity is further connected with a right semicircular water retaining strip, and the right semicircular water tank cavity is divided into a right half inner water tank and a right half outer water tank which are communicated with each other by the right semicircular water retaining strip.
Furthermore, a first circulation port is formed between the second cylindrical water baffle and the end part of the left semicircular water baffle strip, and the left half inner water tank and the left half outer water tank are communicated through the first circulation port;
a second circulation port is formed between the end portions of the first cylinder water baffle and the right semi-circular water retaining strip, and the right half inner water tank and the right half outer water tank are communicated through the second circulation port.
Furthermore, a first notch is formed in the left half inner water tank close to the first cylindrical water baffle and is communicated with a semi-cylindrical cavity formed in the flange sleeve; and a second notch is formed in the right half inner water tank close to the second cylindrical water baffle and is in through connection with the other half cylindrical cavity formed in the flange sleeve.
Furthermore, the water inlet and the first notch are arranged on the left side of the first cylinder water baffle, and the water outlet and the second notch are arranged on the right side of the second cylinder water baffle.
Furthermore, the left semicircular water retaining strip is detachably connected with the cylindrical flange; and the right semicircular ring water bar is detachably connected with the cylindrical flange.
Furthermore, the left semicircular water retaining strip is connected with the cylindrical flange through two symmetrically arranged screws; the semicircular water retaining strip is connected with the cylindrical flange through two symmetrically arranged screws.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. according to the utility model discloses create the cooling flange of manufacturing, can satisfy the vacuum apparatus needs, carry out cooling to the flange position.
2. The cooling flange can be arranged between the vacuum tank body and the vacuum flange, and the cooling of a specific position is realized under the condition that the original function of the flange is not influenced.
3. The cooling flange adopts the form of embedded cooling water channel, has realized the cooling to the device, and circulating water gets into from the water inlet, is full of the inside water course of one side drum flange, the cooling intermediate layer between the water jacket, the inside water course of opposite side drum flange in proper order, flows out by the delivery port of opposite side at last, and the inside circulating water that forms of whole cooling flange flows.
4. Vacuum sealing grooves are reserved on two end faces of the cooling flange and can be used as sealing boundaries of a vacuum device.
5. The cooling flange can be improved according to the actual requirement on the radial dimension and the axis cooling form so as to meet the use requirements of different forms of vacuum devices.
Drawings
FIG. 1 is a diagram of a prior art vacuum flange cooling;
FIG. 2 is an exploded view of a water cooled flange;
FIG. 3 is a part diagram of a water-cooled flange before welding of a cylindrical flange;
FIG. 4 is an assembled view of the water cooled flange after welding of the cylindrical flange;
FIG. 5 is a schematic view of the annular water trough cavity inside the cylindrical flange;
FIG. 6 is a schematic view of the internal water flow of the water-cooled flange during operation;
fig. 7 is a general assembly view of a water cooled flange.
The reference numbers in the figures illustrate: the water-saving water heater comprises a cylindrical flange 1, a water inlet 2, a water outlet 3, a cylindrical water baffle 4, a cylindrical water cover 5, a cylindrical plug 6, an outer water jacket 7, an inner water jacket 8 and a round plug 9; the water-retaining device comprises a left semicircular water-retaining strip 101, a first notch 102, a first cylindrical water baffle 103, a right semicircular water-retaining strip 104, a second notch 105, a second cylindrical water baffle 106, a first circulating port 107 and a second circulating port 108; a left half inner water tank 109, a left half outer water tank 110, a right half inner water tank 111, and a right half outer water tank 112.
Detailed Description
For a better understanding of the objects, structure and function of the invention, reference should be made to the drawings, FIGS. 1-7, which are included to illustrate the invention.
The utility model discloses an embedded to the inside form of vacuum flange, realized directly and heat source contact cooling's function, wherein the embedded structure to vacuum flange inside, the design has endless cooling water route in the middle of it, has the inlet outlet at the flange port, can realize the circulation of cooling water to there is seal structure at water-cooling flange terminal surface design, can regard as the tie of vacuum flange and vacuum tank body coupling, still does not influence the original function of corresponding vacuum flange simultaneously.
The water-cooling flange adopts the form of embedded cooling water route, has solved the too high unable refrigerated problem of vacuum flange local temperature, and simultaneously, the water-cooling flange still considers subsequent installation convenience and with the problem of whole vacuum apparatus uniformity, all has good harmony in the aspect of end face seal, space occupy, do not influence original vacuum flange functionality etc.. In the whole using process, the installation form and the structural function of the water-cooling flange well realize the effects of cooling and heat transfer.
The utility model relates to a water-cooling flange with embedded circulating water path, which comprises a cylindrical flange 1 with an annular water tank cavity and a cylindrical water cover 5 covered on the cylindrical flange 1, wherein the inner ring of the cylindrical flange 1 is connected with a flange sleeve, the inside of the flange sleeve is provided with a cylindrical cavity which is communicated with the annular water tank cavity, and the flange sleeve and the cylindrical flange 1 are coaxially arranged; one end through connection of cylinder flange 1 has water inlet 2, and the other end through connection of cylinder flange 1 has delivery port 3, and the water that flows through from water inlet 2 flows through cylinder flange 1, cylinder water cover 5, delivery port 3 to realize the water-cooling.
The flange sleeve comprises a cylinder plug 6, an outer water jacket 7 and an inner water jacket 8; an inner water jacket 8 is inserted into the outer water jacket 7, a cylindrical cavity for water to flow is formed between the outer water jacket 7 and the inner water jacket 8, and the ends of the outer water jacket 7 and the inner water jacket 8 are sealed by a cylindrical water cover 5. Further, two section of thick bamboo water fenders 4 are still established to flange sleeve inside, and the length of every section of thick bamboo water fender 4 weak point is in flange sleeve's length to make a section of thick bamboo water fender 4's both ends all form a section of thick bamboo water breach, and two section of thick bamboo water fenders 4 divide into the cylindrical cavity in the flange sleeve into two half cylindrical cavity that communicate each other, and two half cylindrical cavity's intercommunication is realized to a section of thick bamboo water breach. The cylinder flange 1, the cylinder water baffle 4, the cylinder water cover 5 and the circular plug 9 are welded through argon arc welding filler, a mould is used for welding during welding, a thick plate is welded and fixed on a platform, and other parts are welded with the thick plate, so that the phenomenon that the deformation is overlarge in the welding process is prevented, and the welding is finished. Parts before welding and finished parts after welding.
And (3) welding the parts such as the cylinder plug 6, the outer water jacket 7, the inner water jacket 8, the cylinder water level 4 and the like with the welded cylinder flange 1, wherein argon arc welding is adopted for all welding, the corresponding screw hole direction is ensured, integral leakage detection is carried out after welding, a pressure test is carried out after leakage detection, and the water pressure of 0.5mpa is kept for 30 min.
The annular water tank cavity comprises a left semi-ring water tank cavity and a right semi-ring water tank cavity; a first cylindrical water baffle 103 and a second cylindrical water baffle 106 are connected in the annular water tank cavity of the cylindrical flange 1, so that the annular water tank cavity is divided into a left semi-ring water tank cavity and a right semi-ring water tank cavity, the left semi-ring water tank cavity is communicated with the water inlet 2, and the right semi-ring water tank cavity is communicated with the water outlet 3.
The left half-ring water tank cavity comprises a left half inner water tank 109 and a left half outer water tank 110; and the right semi-ring water tank cavity comprises a right semi-inner water tank 111 and a right semi-outer water tank 112. The left half-ring water tank cavity is also connected with a left half-ring water retaining strip 101, and specifically, the left half-ring water tank cavity is divided into a left half inner water tank 109 and a left half outer water tank 110 which are communicated through the left half-ring water retaining strip 101; similarly, the right semicircular water tank cavity is also connected with a right semicircular water retaining strip 104, and the right semicircular water tank cavity is divided into a right inner water tank 111 and a right outer water tank 112 by the right semicircular water retaining strip 104, which are communicated with each other.
A first circulation port 107 is formed between the second cylindrical water baffle 106 and the end part of the left semicircular water baffle bar 101, and the left half inner water tank 109 is communicated with the left half outer water tank 110 through the first circulation port 107; a second circulation port 108 is arranged between the end parts of the first cylindrical water baffle 103 and the right semi-circular water baffle 104, and the right semi-inner water tank 111 and the right semi-outer water tank 112 are communicated through the second circulation port 108.
A first notch 102 is formed in the left half inner water groove 109 close to the first cylindrical water baffle 103, and the first notch 102 is communicated with a semi-cylindrical cavity formed in the flange sleeve; a second notch 105 is formed in the right half inner water tank 111 close to the second cylindrical water baffle 106, and the second notch 105 is communicated with the other half cylindrical cavity formed in the flange sleeve. The water inlet 2 and the first notch 102 are provided on the left side of the first cylindrical water shield 103, and the water outlet 3 and the second notch 105 are provided on the right side of the second cylindrical water shield 106.
In order to replace parts conveniently, the left semicircular water retaining strip 101 and the cylindrical flange 1 are detachably connected; and the right semi-circular ring water bar 104 is detachably connected with the cylinder flange 1. The left semicircular water retaining strip 101 is connected with the cylindrical flange 1 through two symmetrically arranged screws; the semicircular water retaining strip 104 is connected with the cylindrical flange 1 through two symmetrically arranged screws.
The utility model has the advantages of it is following:
1. the whole circular design of the water-cooling flange meets the butt joint with the vacuum flange.
2. The positions of the water inlet and the water outlet on the arc end surface of the water-cooling flange can be changed, and the requirements of vacuum equipment with different specifications and shapes are met.
3. The shape of the water channel circulating water channel in the water-cooling flange can be changed according to actual requirements so as to meet the cooling requirements of flanges with different positions and different specifications.
4. The embedded type is arranged on the vacuum tank body, and the cooling effect of the water-cooling flange is exerted to the maximum extent.
5. The radial size of the cooling flange can be changed according to actual needs, the water-cooling flange is embedded in the cooling interlayer in the vacuum tank body, the shape and the length can be changed according to actual needs, and therefore a series of cooling flanges can be formed.
The working principle is as follows: the water flows out from the water inlet 2, the left half outer water tank 110, the first circulating port 107, the left half inner water tank 109, the first notch 102, the inner water jacket 8, the second notch 105, the right half inner water tank 111, the right half outer water tank 112 and the water outlet 3, wherein the water inlet 2 and the water outlet 3 can exchange water in and out, so that the water cooling flange is cooled.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes or equivalents may be substituted for elements thereof by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.

Claims (10)

1. The utility model provides a water-cooling flange with embedded circulation water route which characterized in that: the flange comprises a cylindrical flange (1) with an annular water tank cavity and a cylindrical water cover (5) covered on the cylindrical flange (1), wherein the inner ring of the cylindrical flange (1) is connected with a flange sleeve, the cylindrical cavity formed in the flange sleeve is communicated with the annular water tank cavity, and the flange sleeve and the cylindrical flange (1) are coaxially arranged;
one end through connection of cylinder flange (1) has water inlet (2), and the other end through connection of cylinder flange (1) has delivery port (3), and the water that flows through from water inlet (2) flows through cylinder flange (1), cylinder water cover (5), delivery port (3) to realize the water-cooling.
2. The water-cooled flange with the embedded circulating waterway according to the claim 1, wherein the flange sleeve comprises a cylinder plug (6), an outer water jacket (7) and an inner water jacket (8); an inner water jacket (8) is inserted into the outer water jacket (7), a cylindrical cavity for water to flow is formed between the outer water jacket (7) and the inner water jacket (8), and the ends of the outer water jacket (7) and the inner water jacket (8) are sealed through a cylindrical water cover (5).
3. The water-cooling flange with the embedded circulating water channel as claimed in claim 2, wherein two water baffles (4) are further arranged inside the flange sleeve, the length of each water baffle (4) is shorter than that of the flange sleeve, so that two ends of each water baffle (4) form a water gap, the two water baffles (4) divide the cylindrical cavity in the flange sleeve into two semi-cylindrical cavities which are communicated with each other, and the water gaps realize the communication of the two semi-cylindrical cavities.
4. The water-cooled flange with the embedded circulating water channel is characterized in that a first cylindrical water baffle (103) and a second cylindrical water baffle (106) are connected in an annular water tank cavity of the cylindrical flange (1), so that the annular water tank cavity is divided into a left half-ring water tank cavity and a right half-ring water tank cavity, the left half-ring water tank cavity is communicated with the water inlet (2), and the right half-ring water tank cavity is communicated with the water outlet (3).
5. The water-cooled flange with the embedded circulating waterway according to claim 4, wherein a left semicircular water retaining strip (101) is further connected in the left semi-ring water tank cavity, and the left semicircular water retaining strip (101) divides the left semi-ring water tank cavity into a left semi-inner water tank (109) and a left semi-outer water tank (110) which are communicated with each other;
the right semicircular water tank cavity is further connected with a right semicircular water retaining strip (104), and the right semicircular water tank cavity is divided into a right half inner water tank (111) and a right half outer water tank (112) by the right semicircular water retaining strip (104), wherein the right half inner water tank and the right half outer water tank are communicated with each other.
6. The water-cooling flange with the embedded circulating waterway according to claim 5, wherein a first circulating port (107) is formed between the second cylindrical water baffle (106) and the end part of the left semicircular water baffle bar (101), and the left half inner water tank (109) is communicated with the left half outer water tank (110) through the first circulating port (107);
a second circulation port (108) is formed between the end parts of the first cylinder water baffle (103) and the right semi-circular water retaining strip (104), and the right half inner water tank (111) and the right half outer water tank (112) are communicated through the second circulation port (108).
7. The water-cooling flange with the embedded circulating water channel as claimed in claim 6, wherein a first gap (102) is formed at the left half inner water channel (109) close to the first cylindrical water baffle (103), and the first gap (102) is communicated with a semi-cylindrical cavity formed in the flange sleeve; and a second notch (105) is formed in the right half inner water tank (111) close to the second cylindrical water baffle (106), and the second notch (105) is communicated with the other half cylindrical cavity formed in the flange sleeve.
8. The water-cooled flange with an embedded circulating waterway according to claim 7, wherein the water inlet (2) and the first notch (102) are arranged at the left side of the first cylindrical water shield (103), and the water outlet (3) and the second notch (105) are arranged at the right side of the second cylindrical water shield (106).
9. The water-cooling flange with the embedded circulating waterway according to the claim 6 or 7, wherein the left semicircular water retaining strip (101) is detachably connected with the cylindrical flange (1); and the right semicircular water retaining strip (104) is detachably connected with the cylindrical flange (1).
10. The water-cooling flange with the embedded circulating waterway according to the claim 8, wherein the left semicircular water retaining strip (101) is connected with the cylindrical flange (1) through two symmetrically arranged screws; the semicircular water retaining strip (104) is connected with the cylindrical flange (1) through two symmetrically arranged screws.
CN201921922721.2U 2019-11-08 2019-11-08 Water-cooling flange with embedded circulating water channel Active CN210860192U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921922721.2U CN210860192U (en) 2019-11-08 2019-11-08 Water-cooling flange with embedded circulating water channel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921922721.2U CN210860192U (en) 2019-11-08 2019-11-08 Water-cooling flange with embedded circulating water channel

Publications (1)

Publication Number Publication Date
CN210860192U true CN210860192U (en) 2020-06-26

Family

ID=71305449

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921922721.2U Active CN210860192U (en) 2019-11-08 2019-11-08 Water-cooling flange with embedded circulating water channel

Country Status (1)

Country Link
CN (1) CN210860192U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112097525A (en) * 2020-09-09 2020-12-18 中国振华集团云科电子有限公司 Atmosphere tube furnace cooling device and cooling method
CN112780856A (en) * 2019-11-08 2021-05-11 核工业理化工程研究院 Water-cooling flange with embedded circulating water channel
CN114440044A (en) * 2021-12-28 2022-05-06 河北华丰能源科技发展有限公司 Cooling device convenient to dismouting

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112780856A (en) * 2019-11-08 2021-05-11 核工业理化工程研究院 Water-cooling flange with embedded circulating water channel
CN112097525A (en) * 2020-09-09 2020-12-18 中国振华集团云科电子有限公司 Atmosphere tube furnace cooling device and cooling method
CN114440044A (en) * 2021-12-28 2022-05-06 河北华丰能源科技发展有限公司 Cooling device convenient to dismouting

Similar Documents

Publication Publication Date Title
CN210860192U (en) Water-cooling flange with embedded circulating water channel
CN112780856A (en) Water-cooling flange with embedded circulating water channel
CN108696040B (en) Water-cooled motor shell and motor
CN206441784U (en) A kind of battery tray radiator structure
CN205377538U (en) High efficiency, no welded water -cooling permanent -magnet alternating -current servo motor's casing
CN206041193U (en) Laser head mirror chamber water -cooling structure of tubulose network
WO2017152300A1 (en) Water-cooling shell for servo motor and manufacturing processes thereof
CN204894479U (en) A interior sizing cover cooling body that is used for compound pipe production line of plastics
CN207530085U (en) A kind of water-filled radiator shell of new energy car battery
CN106168452B (en) A kind of efficient heat radiation plate
CN202616918U (en) Cooling device of motor
CN204859868U (en) Liquid cooling type water -cooling head and heat radiation structure with reposition of redundant personnel design
CN206633363U (en) Mould with cooling system
CN206347897U (en) Strengthen the pipe rock radiator of outside flat tube
CN105180678A (en) Heat exchanger
CN205453371U (en) Servo motor's water -cooling machine shell
CN210265923U (en) High-temperature-resistant sealing stop valve
CN207048986U (en) A kind of helical-lobe compressor for polyether macromonomer production
CN106847769A (en) For the radiator of power model
CN106413347A (en) Novel double-faced water-cooled heat radiator
CN207230146U (en) Housing channel structure
CN110773715A (en) Thermal balance system of deep-cavity radiating tooth die inlaying structure
CN216738521U (en) CVD reacting furnace body cooling structure
CN214221673U (en) Hydraulic cylinder with water-cooled heat radiation structure for oil press
CN210738939U (en) Heat insulation structure for hot water circulating pump

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant