A large-scale supergravity geotechnical centrifuge with double walls and double doors

Abstract

The present invention discloses a double-wall double-door structure for a large-scale supergravity geotechnical centrifuge. The inner door of the cylindrical jacket heat exchanger is pushed and moved sideways toward the inner centrifuge rotor system, and the rectangular outer door of the vacuum shell moves sideways; the centrifuge rotor system is installed at the center of the jacket heat exchanger, and the jacket heat exchanger is fixed to the inner side of the vacuum shell through supporting ribs; a rectangular pipe is welded to the side of the vacuum shell corresponding to the door of the inner jacket heat exchanger, and a rectangular flange is welded to the other end of the rectangular pipe, and the rectangular flange is pressed with the rectangular outer door by an outer door pressing device through a rectangular outer door sealing gasket to form a seal. The present invention satisfies the side door of the inner jacket heat exchanger of a large geotechnical centrifuge that, when the side door is closed, it forms a smooth cylindrical inner wall surface with the jacket heat exchanger, and does not increase wind resistance power; at the same time, coolant is introduced into the side door, and the heat exchange area will not be reduced due to the setting of the side door; the structure is simple, and it is also applicable to the side door design of other cylindrical bodies with more than two layers.

Description

Technical Field

[0001] The invention relates to a multi-door structure of a multi-layer shell, in particular to a double-wall double-door structure of a large-scale supergravity geotechnical centrifuge. Background Art

[0002] As the gravity acceleration of geotechnical centrifuges continues to increase, the wind resistance power of the centrifuge also increases in cubic series. Heat dissipation has become a prominent problem for supergravity machines and geotechnical centrifuges. A large amount of heat generation will cause the temperature in the cabin to rise, resulting in malfunction. If the temperature control is not well solved, all instruments in the centrifuge cabin will have problems. Generally, the temperature of the centrifuge cabin is required to be controlled below 45°C. In order to solve the temperature rise problem of super-large geotechnical centrifuges, the most effective method at present is a temperature control method that combines vacuuming the machine room with arranging low-temperature cooling heat exchangers around the centrifuge room. Therefore, the centrifuge room has a two-layer structure, namely the outer vacuum shell and the cylindrical heat exchanger placed in the vacuum shell and surrounding the centrifuge. Since the test equipment and specimens need to open a side door on the side for entry and exit, this requires that both the heat exchanger and the vacuum shell be opened. Since the wind resistance power of the centrifuge room is closely related to the room's geometric structure, surface finish, and flatness, the structure of the heat exchanger's inner door has many special requirements: after the door is closed, it needs to be flush with the entire heat exchanger, consistent with the arc, without any gaps, and with a smooth surface; the inner door must not be a single-sided rotating shaft switch door, because the centrifuge's rotating body inside affects the switch, it can only be a side sliding door; the transmission mechanism, rotating mechanism, etc. of all doors must not affect the wind resistance power.

[0003] At present, the patents related to the side door structure of the geotechnical centrifuge test chamber mainly include CN201911314295.9 of Zhejiang University, our unit, "A collision-proof and quick-opening door structure for a large geotechnical centrifuge", which proposes an collision-proof and quick-opening door structure. The double doors of this structure move outward on tracks along the normal direction of the vacuum shell. The disadvantage of this structure is that the door requires a track, which makes it difficult to seal the vacuum shell. Summary of the invention

[0004] In order to solve the problems existing in the background technology, the purpose of the present invention is to provide a large-scale supergravity geotechnical centrifuge double-wall double-door structure to solve the door opening problem of the double-layer cylindrical structure, especially the side door of the inner jacket heat exchanger needs to meet the requirements of forming a smooth inner wall surface with the jacket heat exchanger when the side door is closed, and coolant can be passed into the side door without reducing the heat exchange area of ​​the side door. The side door of the vacuum shell needs to meet the purpose of sealing and convenient opening and closing.

[0005] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0006] The present invention is used for a side door of a machine room of a large geotechnical centrifuge with a double-layer structure having an inner layer of a cylindrical jacket heat exchanger and an outer layer of a vacuum shell; the inner door of the cylindrical jacket heat exchanger is pushed and moved sideways along a fixed track toward an inner centrifuge rotor system, and the rectangular outer door of the vacuum shell moves sideways along the fixed track; a centrifuge rotor system is installed at the center of the cylindrical jacket heat exchanger, and the cylindrical jacket heat exchanger is fixed to the inner side of the vacuum shell through a plurality of jacket heat exchanger support ribs; a rectangular pipe is welded to the side of the vacuum shell corresponding to the door of the inner jacket heat exchanger, a rectangular flange is welded to the other end of the rectangular pipe, and the rectangular flange is pressed with the rectangular outer door by an outer door pressing device through a rectangular outer door sealing gasket to form a seal.

[0007] The door of the inner layer of the cylindrical jacket heat exchanger is a left-sliding door and a right-sliding door which are divided into left and right halves and have the same structure; the left-sliding door includes: a left-sliding door body, a left-sliding door column installed on the back of the left-sliding door body, a reinforcing rod on the left-sliding door column, and a lower reinforcing rod on the left-sliding door column; the upper end of the left-sliding door column is fixedly connected to one end of the upper reinforcing rod of the left-sliding door column, and the other end of the upper reinforcing rod of the left-sliding door column is fixedly connected to the upper end of the left-sliding door body; the lower end of the left-sliding door column is fixedly connected to one end of the lower reinforcing rod of the left-sliding door column, and the other end of the lower reinforcing rod of the left-sliding door column is fixedly connected to the lower end of the left-sliding door body; a left-sliding door guide pin is installed on the upper side of the right end of the upper reinforcing rod of the left-sliding door column, The left sliding door guide pin is inserted into the left sliding door guide upper track, the lower end surface of the left sliding door column is equipped with the left sliding door column lower guide pin, the lower guide pin of the left sliding door column is inserted into the lower track of the left sliding door column, the upper end surface of the left sliding door column is equipped with the left sliding door column upper guide pin, the upper guide pin of the left sliding door column is inserted into the left sliding door column upper track, and the three tracks fix the left sliding door to move along their respective fixed track trajectories; the left sliding door column is assembled with the left sliding door column upper reinforcement rod and the left sliding door column lower reinforcement rod, and after being fixedly connected to the left sliding door body, a "U"-shaped groove is formed when looking down from the top, and the left sliding door moves leftward so that the cylindrical jacketed heat exchanger enters the "U"-shaped groove.

[0008] The left sliding door column upper track and the left sliding door column lower track are respectively installed on the upper and lower ends of the inner wall of the vacuum shell by means of guide rail fixing devices; the left sliding door guide upper track is installed on the upper end of the inner wall of the vacuum shell by means of guide rail fixing devices.

[0009] The left sliding door guide upper track is a "┎"-shaped track when viewed from the top. The cross-section of the track is rectangular and has a "T"-shaped groove inside, which is interlocked with the "T" pin of the left sliding door guide pin, and the other two tracks are interlocked with their respective pins in the same way; the right sliding door column upper track, the right sliding door guide upper track and the right sliding door column lower track have the same shape and track motion trajectory as the left sliding door guide upper track, the left sliding door column upper track and the left sliding door column lower track; the three tracks of the right sliding door are also fixed to the inner wall of the vacuum shell through guide rail fixing devices.

[0010] The top view of the left sliding door body is an arc with the same curvature radius as that of the cylindrical jacket heat exchanger, and the same coolant as that in the cylindrical jacket heat exchanger circulates inside the left sliding door body; the left sliding door body is composed of an upper side plate, a liquid inlet pipe welded to the outer side plate, a lower side plate, an outer side plate and an inner side plate, a left side plate, a right side plate and a liquid outlet pipe welded to the outer side plate to form a closed cavity; the upper side plate, the lower side plate, the left side plate and the right side plate are in the shape of arc-shaped partitions, all of which are plates with convex arc outer circles and concave arc inner circles, and the outer side plate and the inner side plate are alternately welded to the left side plate or the right side plate through multiple arc-shaped partitions to form an S-shaped flow channel; the liquid inlet pipe is connected to the liquid inlet pipe of the jacket heat exchanger with a hose, and the liquid outlet pipe is connected to the liquid outlet pipe of the jacket heat exchanger with a hose; a driving device is installed at the bottom of the left sliding door.

[0011] The beneficial effects of the present invention are:

[0012] 1) For the side door of the inner jacket heat exchanger of the large geotechnical centrifuge, when the side door is closed, it forms a smooth cylindrical inner wall surface with the jacket heat exchanger, which will not increase the wind resistance power; at the same time, it is designed to allow coolant to pass into the side door without reducing the heat exchange area due to the setting of the side door.

[0013] 2) The double-layer cylindrical structure of large geotechnical centrifuge is simple and easy to open, and the side door design is also applicable to other cylindrical bodies with more than two layers. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a top view of the double-wall and double-door structure of the supergravity geotechnical centrifuge.

[0015] Figure 2 yes Figure 1 AA partial cross-sectional view.

[0016] Figure 3 yes Figure 2 CC cross-sectional view.

[0017] Figure 4 It is an axonometric view of the double-wall and double-door structure of a supergravity geotechnical centrifuge.

[0018] Figure 5 This is the axonometric view of the left sliding door.

[0019] Figure 6 This is the main view of the left sliding door.

[0020] Figure 7 It is a side view of the left sliding door.

[0021] Figure 8 yes Figure 6 Top view of the .

[0022] Fig. 9It is a moving track diagram.

[0023] Fig.10 yes Fig. 9 Cross-sectional view of the BB moving track.

[0024] Fig.11 It is a cross-sectional view of the left sliding door body.

[0025] Fig.12 It is a top view of the left sliding door body.

[0026] In the figure: 1, vacuum shell, 2, cylindrical jacket heat exchanger, 3, right sliding door column upper track, 4, right sliding door guide upper track, 5, right sliding door column lower track, 6, left sliding door guide upper track, 7, left sliding door column upper track, 8, left sliding door column lower track, 9, right sliding door, 10, left sliding door, 11, centrifuge rotor system, 12, left sliding door guide pin, 13, left sliding door column upper reinforcement rod, 14, left sliding door body, 15, left sliding door column, 16, left sliding door column lower Reinforcement rod, 17, guide pin shaft under the left sliding door column, 18, guide pin shaft on the left sliding door column, 19, jacket heat exchanger support rib, 20, rectangular connecting pipe, 21, rectangular flange, 22, rectangular outer door, 23, rectangular outer door sealing gasket, 24, outer door clamping device, 25, guide rail fixing device, 26, guide rail guide groove, 27, "U"-shaped groove, 28, driving device, 29, liquid inlet pipe, 30, outer side plate, 31, inner side plate, 32, liquid outlet pipe, 33, upper side plate, 34, arc partition, 35, right side plate, 36, S-shaped flow channel, 37, left side plate, 38, lower side plate. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the present invention is used for a side door of a machine room of a double-layer structure large geotechnical centrifuge having an inner layer of a cylindrical jacket heat exchanger 2 and an outer layer of a vacuum shell 1, and is characterized in that: the inner door of the cylindrical jacket heat exchanger 2 is pushed and moved sideways along a fixed track toward the inner centrifuge rotor system 11, and the rectangular outer door 22 of the vacuum shell 1 moves sideways along the fixed track; the centrifuge rotor system 11 is installed at the center of the cylindrical jacket heat exchanger 2, and the cylindrical jacket heat exchanger 2 is fixed to the inner side of the vacuum shell 1 through a plurality of jacket heat exchanger support ribs 19; a rectangular pipe 20 is welded to the side of the vacuum shell 1 corresponding to the door of the inner jacket heat exchanger 2, and a rectangular flange 21 is welded to the other end of the rectangular pipe 20, and the rectangular flange 21 is pressed against the rectangular outer door 22 through a rectangular outer door sealing gasket 23 by an outer door pressing device 24 to form a seal.

[0029] like Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, the inner door of the cylindrical jacket heat exchanger 2 is a left-sliding door 10 and a right-sliding door 9 which are divided into left and right halves and have the same structure; the left-sliding door 10 includes: a left-sliding door body 14, a left-sliding door column 15 installed on the back of the left-sliding door body 14, a left-sliding door column upper reinforcement rod 13, and a left-sliding door column lower reinforcement rod 16; the upper end of the left-sliding door column 15 is fixedly connected to one end of the left-sliding door column upper reinforcement rod 13, and the other end of the left-sliding door column upper reinforcement rod 13 is fixedly connected to the upper end of the left-sliding door body 14; the lower end of the left-sliding door column 15 is fixedly connected to one end of the left-sliding door column lower reinforcement rod 16, and the other end of the left-sliding door column lower reinforcement rod 16 is fixedly connected to the lower end of the left-sliding door body 14; the left-sliding door guide pin 12 is installed on the upper side of the right end of the left-sliding door column upper reinforcement rod 13 The left sliding door guide pin 12 is inserted into the left sliding door guide upper track 6, the lower end surface of the left sliding door column 15 is installed with the left sliding door column lower guide pin 17, the left sliding door column lower guide pin 17 is inserted into the left sliding door column lower track 8, the upper end surface of the left sliding door column 15 is installed with the left sliding door column upper guide pin 18, the left sliding door column upper guide pin 18 is inserted into the left sliding door column upper track 7, and the three tracks fix the left sliding door 10 to move along the respective fixed track tracks; the left sliding door column 15 is assembled with the left sliding door column upper reinforcement rod 13 and the left sliding door column lower reinforcement rod 16, and after being fixedly connected with the left sliding door body 14, a "U"-shaped groove 27 is formed when viewed from the top, and the left sliding door 10 moves leftward so that the cylindrical jacket heat exchanger 2 enters the "U"-shaped groove 27. The right sliding door 9 and the left sliding door 10 are completely symmetrical and have the same structure, which will not be described in detail.

[0030] like Figure 3 As shown, the left sliding door column upper track 7 and the left sliding door column lower track 8 are respectively installed on the upper and lower ends of the inner wall of the vacuum shell 1 by the guide rail fixing device 25; the left sliding door guide upper track 6 is installed on the upper end of the inner wall of the vacuum shell 1 through the guide rail fixing device 25.

[0031] like Fig. 9 , Fig.10 As shown, the left sliding door guide upper track 6 is a "┎"-shaped track when viewed from the top, and the cross-section of the track is rectangular with a "T"-shaped groove inside, which is interlocked with the "T" pin of the left sliding door guide pin 12, and the other two tracks are interlocked with their respective pins in the same way; the right sliding door column upper track 3, the right sliding door guide upper track 4 and the right sliding door column lower track 5 have the same shape and track motion trajectory as the left sliding door guide upper track 6, the left sliding door column upper track 7 and the left sliding door column lower track 8; the three tracks of the right sliding door 9 are also fixed to the inner wall of the vacuum shell 1 through the guide rail fixing devices 25 respectively.

[0032] like Fig.11, Fig.12 As shown, the top view of the left sliding door body 14 is an arc with the same curvature radius as that of the cylindrical jacket heat exchanger 2, and the inside of the left sliding door body 14 circulates the same coolant as that in the cylindrical jacket heat exchanger 2; the left sliding door body 14 is composed of an upper side plate 33, a liquid inlet pipe 29 welded to the outer side plate 30, a lower side plate 38, an outer side plate 30 and an inner side plate 31, a left side plate 37, a right side plate 35 and a liquid outlet pipe 32 welded to the outer side plate 30 to form a closed cavity; the upper side plate 33, the lower side plate 38, the left side plate 37, and the right side plate 35 are arc-shaped partition plates, all of which are plates with a convex arc outer circle and a concave arc inner circle. The outer plate 30 and the inner plate 31 are alternately welded to the left plate 37 or the right plate 35 through a plurality of arc-shaped partitions 34 to form an S-shaped flow channel 36; the liquid inlet pipe 29 is connected to the liquid inlet pipe of the jacket heat exchanger 2 by a hose, and the liquid outlet pipe 32 is connected to the liquid outlet pipe of the jacket heat exchanger 2 by a hose; a driving device 28 is installed at the bottom of the left sliding door 10.

[0033] The working principle of the present invention is as follows: when the centrifuge needs to be operated or tested, the outer door clamping device 24 is loosened, the rectangular outer door 22 is moved laterally along the ground track, and the inner door driving device 28 is started, so that the inner doors move along their respective tracks and open to the left and right. At this time, the double doors are fully opened, and personnel, test pieces, etc. can enter and exit for installation. When the test piece is installed, the personnel evacuate the door, start the inner door driving device 28, close the inner door, and then close the outer door, lock the outer door clamping device 24, and start the centrifuge according to the working procedure of the centrifuge. After the centrifuge is stopped, the next same door opening and closing procedure is carried out.

Claims

1. A large-scale supergravity geotechnical centrifuge double-wall double-door structure, used for a large-scale geotechnical centrifuge with a double-layer structure having an inner layer of a cylindrical jacket heat exchanger (2) and an outer layer of a vacuum shell (1) with a side door opening of the machine room, characterized in that: The inner door of the cylindrical jacket heat exchanger (2) is pushed and moved sideways along a fixed track toward the inner centrifuge rotor system (11), and the rectangular outer door (22) of the vacuum shell (1) moves sideways along the fixed track; the centrifuge rotor system (11) is installed at the center of the cylindrical jacket heat exchanger (2), and the cylindrical jacket heat exchanger (2) is fixed to the inner side of the vacuum shell (1) via a plurality of jacket heat exchanger support ribs (19); a rectangular pipe (20) is welded to the side of the vacuum shell (1) corresponding to the door of the inner jacket heat exchanger (2), a rectangular flange (21) is welded to the other end of the rectangular pipe (20), and the rectangular flange (21) is pressed against the rectangular outer door (22) via a rectangular outer door sealing gasket (23) by an outer door pressing device (24) to form a seal; The inner door of the cylindrical jacket heat exchanger (2) is a left-sliding door (10) and a right-sliding door (9) which are divided into left and right halves and have the same structure; the left-sliding door (10) comprises: a left-sliding door body (14), a left-sliding door column (15) installed on the back of the left-sliding door body (14), a left-sliding door column upper reinforcement rod (13), and a left-sliding door column lower reinforcement rod (16); the upper end of the left-sliding door column (15) and the left-sliding door column upper reinforcement rod (13) are connected to each other. The left sliding door body (14) is fixedly connected to one end of the left sliding door column upper reinforcement rod (13), and the other end of the left sliding door column upper reinforcement rod (13) is fixedly connected to the upper end of the left sliding door body (14); the lower end of the left sliding door column (15) is fixedly connected to one end of the left sliding door column lower reinforcement rod (16), and the other end of the left sliding door column lower reinforcement rod (16) is fixedly connected to the lower end of the left sliding door body (14); the left sliding door guide pin shaft (12) is installed on the upper side of the right end of the left sliding door column upper reinforcement rod (13) The left sliding door guide pin (12) is inserted into the left sliding door guide upper track (6), the lower end surface of the left sliding door column (15) is equipped with a left sliding door column lower guide pin (17), the left sliding door column lower guide pin (17) is inserted into the left sliding door column lower track (8), the upper end surface of the left sliding door column (15) is equipped with a left sliding door column upper guide pin (18), the left sliding door column upper guide pin (18) is inserted into the left sliding door column upper track In the track (7), three tracks fix the left sliding door (10) to move along the respective fixed track tracks; the left sliding door column (15) is assembled with the left sliding door column upper reinforcement rod (13) and the left sliding door column lower reinforcement rod (16), and after being fixedly connected with the left sliding door body (14), a "U"-shaped groove (27) is formed when viewed from the top, and the left sliding door (10) moves leftward so that the cylindrical jacketed heat exchanger (2) enters the "U"-shaped groove (27).

2. The double-wall double-door structure of a large-scale supergravity geotechnical centrifuge according to claim 1 is characterized in that: The left sliding door column upper track (7) and the left sliding door column lower track (8) are respectively mounted on the upper and lower ends of the inner wall of the vacuum housing (1) by means of a guide rail fixing device (25); the left sliding door guide upper track (6) is mounted on the upper end of the inner wall of the vacuum housing (1) by means of a guide rail fixing device (25).

3. The double-wall double-door structure of a large-scale supergravity geotechnical centrifuge according to claim 2, characterized in that: The left sliding door guide upper track (6) is a "┎"-shaped track when viewed from the top, and the cross section of the track is rectangular, with a "T"-shaped groove inside, which is interlocked with the "T" pin of the left sliding door guide pin (12), and the other two tracks are interlocked with their respective pins in the same way; the right sliding door column upper track (3), the right sliding door guide upper track (4) and the right sliding door column lower track (5) have the same shape and track motion trajectory as the left sliding door guide upper track (6), the left sliding door column upper track (7) and the left sliding door column lower track (8); the three tracks of the right sliding door (9) are also fixed to the inner wall of the vacuum housing (1) through the guide rail fixing devices (25).

4. The large-scale supergravity geotechnical centrifuge double-wall double-door structure according to claim 1, characterized in that: The top view of the left-moving door body (14) is an arc having a curvature radius that is the same as that of the cylindrical jacket heat exchanger (2). The same coolant as that in the cylindrical jacket heat exchanger (2) flows inside the left-moving door body (14). The left-moving door body (14) is composed of an upper side plate (33), a liquid inlet pipe (29) welded to the outer side plate (30), a lower side plate (38), the outer side plate (30) and the inner side plate (31), a left side plate (37), a right side plate (35) and a liquid outlet pipe (32) welded to the outer side plate (30) to form a closed cavity. The upper side plate (33), the lower side plate (38), the left side plate (37) and the right side plate (35) are arc-shaped partition plates, and are all plates with a convex arc outer circle and a concave arc inner circle. The outer plate (30) and the inner plate (31) are alternately welded to the left plate (37) or the right plate (35) via a plurality of arc-shaped partitions (34) to form an S-shaped flow channel (36); the liquid inlet pipe (29) is connected to the liquid inlet pipe of the jacket heat exchanger (2) by a hose, and the liquid outlet pipe (32) is connected to the liquid outlet pipe of the jacket heat exchanger (2) by a hose; and a driving device (28) is installed at the bottom of the left sliding door (10).

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