Pressure balancing and maintaining device for 3D printing equipment

Abstract

The invention relates to the technical field of pressure balancing devices, and particularly discloses a pressure balancing and pressure maintaining device for 3D printing equipment, the pressure balancing and pressure maintaining device comprises a forming cabin and a pressure cabin, the opposite sides of the forming cabin and the pressure cabin communicate with connectors, and the two connectors are fixedly connected through a connecting pipe; the bottom of the forming cabin and the bottom of the pressure cabin are both fixedly connected with damping devices, one side of the inner wall of the pressure cabin is fixedly connected with an organ sealing cover, the organ sealing cover communicates with a connector, and the side, away from the connector, of the forming cabin communicates with an air outlet of a first air inlet valve. And a damping device is arranged, so that the situation that the pressure balance is influenced by gas leakage caused by loosening of components due to vibration of the device can be avoided, the stability of the pressure balance is further ensured, the sealing reliability is ensured through effective sealing and stable connection of the connecting pipe and the connector, and the stability of the pressure balance is further improved.

Description

Technical Field

[0001] This invention relates to the field of pressure balancing device technology, specifically a pressure balancing and pressure holding device for 3D printing equipment. Background Technology

[0002] With the rapid development of additive manufacturing technology, 3D printing technology has been widely used in many fields such as industrial manufacturing, aerospace, medical and health, automotive parts, and architectural design due to its significant advantages such as personalized customization, complex structure molding, high material utilization and short production cycle. It has become one of the important supporting technologies for the transformation and upgrading of modern manufacturing industry. In the 3D printing process, printing accuracy, molding quality and process stability are the core indicators for measuring equipment performance. The pressure state inside the printing cavity, as a key process parameter, directly affects the melting, deposition and solidification effect of the printing material, and thus plays a decisive role in the mechanical properties, dimensional accuracy and surface quality of the molded parts.

[0003] Chinese patent CN115487878B discloses a pressure balancing device and an environmental test chamber, which can achieve the effect of ensuring the sealing of the device while balancing the pressure. However, it cannot reduce the vibration during the operation of the device. The device will generate severe vibration during operation, which will cause the pipe connection to loosen and affect the sealing, thus resulting in a poor pressure balancing effect. Summary of the Invention

[0004] To solve the above technical problems, the present invention is implemented through the following technical solution: a pressure balancing and pressure holding device for 3D printing equipment, comprising a forming chamber and a pressure chamber, wherein the forming chamber and the pressure chamber are each connected to a connector on opposite sides, and two sets of connectors are fixedly connected by a connecting pipe; shock-absorbing devices are fixedly connected to the bottom of both the forming chamber and the pressure chamber; a bellows sealing cover is fixedly connected to one side of the inner wall of the pressure chamber, and the bellows sealing cover is connected to the connector; the side of the forming chamber away from the connector is connected to the outlet of a first air inlet valve, and the side of the forming chamber is connected to the inlet of a first air outlet valve; the side of the pressure chamber away from the connector... The pressure chamber has an outlet connected to a second air inlet valve on one side, and an inlet connected to a second air outlet valve on one side. A first pressure detector is fixedly connected to the portion of the side of the forming chamber located on the side of the first air outlet valve. A second pressure detector is fixedly connected to the portion of the side of the pressure chamber located on the side of the second air outlet valve. A control component is fixedly connected to the portion of the side of the forming chamber located between the first air outlet valve and the first pressure detector. The connecting pipe includes a pipe, and an annular mounting plate is fixedly connected to both ends of the pipe. Limiting blocks are evenly fixedly connected to the sides of the annular mounting plates. First fixing grooves are evenly opened on the sides of the pipe.

[0005] Preferably, the connector includes a pipe body, the side of which is uniformly provided with a second fixing groove, one end of which is provided with an installation groove, a limiting groove is provided on one side of the inner wall of the installation groove, a rotating groove is provided on one side of the inner wall of the limiting groove, the rotating groove is connected to the installation groove, a fixing mechanism is sleeved on and slidably connected to the pipe body, and a sealing ring is provided on one side of the inner wall of the installation groove.

[0006] Preferably, the inner wall of the mounting groove is slidably connected to the side of the annular mounting plate, the inner wall of the limiting groove is slidably connected to the side of the limiting block, and the inner wall of the rotating groove is slidably connected to the side of the limiting block.

[0007] Preferably, a placement groove is evenly formed on one side of the inner wall of the mounting groove, a first sliding groove is formed on one side of the inner wall of the placement groove, a second sliding groove is formed on one side of the inner wall of the first sliding groove, a flexible sealing push plate is provided on the inner wall of the placement groove, a sliding rod is fixedly connected to one side of the flexible sealing push plate, the side of the sliding rod is slidably connected to the inner wall of the first sliding groove, a first wedge block is fixedly connected to the end of the sliding rod away from the flexible sealing push plate, a second wedge block is slidably connected to the side of the first wedge block, a threaded rod is rotatably connected to the second wedge block, a handle is fixedly connected to the top of the threaded rod, the side of the second wedge block is slidably connected to the second sliding groove, and the threaded rod passes through the pipe body and is threadedly connected to the pipe body. When the pressure chamber and the forming chamber are installed, the annular mounting plate is pushed in along the mounting groove, the limiting block enters the limiting groove and the rotating groove for positioning, and the sealing ring achieves initial sealing. Rotating the handle drives the threaded rod to rotate, driving the second wedge block to slide along the second sliding groove, pushing the first wedge block to drive the sliding rod to move along the first sliding groove, so that the flexible sealing push plate tightly fits the sealing ring and is further compressed, thereby enhancing the sealing effect.

[0008] Preferably, the fixing mechanism includes an annular sleeve plate. The inner wall of the annular sleeve plate has evenly spaced third sliding grooves. Two sets of the third sliding grooves are symmetrically distributed on the inner wall of the annular sleeve plate. A first spring is fixedly connected to the top of the inner wall of the third sliding groove. A pull rod is slidably connected through the portion of the top of the inner wall of the third sliding groove located inside the first spring. A pull ring is fixedly connected to the top of the pull rod, and a fixing post is fixedly connected to the bottom of the pull rod. Two sets of fixing posts are slidably connected to the inner walls of the first fixing groove and the second fixing groove, respectively. The annular sleeve plate is fitted at the connection between the pipe body and the pipeline. After the pipe body and the pipeline are connected, the annular sleeve plate is fitted at the connection position. Under the elastic force of the first spring, the fixing posts are embedded into the first fixing groove and the second fixing groove, further fixing them. When maintenance is required, pulling the pull ring moves the pull rod upward, causing the pull rod to compress the first spring, allowing the fixing post to disengage from the fixing groove, thus separating the pipe body from the pipeline.

[0009] Preferably, the shock absorption device includes a fixed plate, with a first U-shaped frame fixedly connected to each diagonal corner of the bottom of the fixed plate. A first rotating frame is rotatably connected to the inner wall of the first U-shaped frame. A second spring is fixedly connected to one end of the first rotating frame. The movable end of an elastic telescopic rod is fixedly connected to the portion of one end of the first rotating frame located inside the second spring. A second rotating frame is fixedly connected to the fixed end of the elastic telescopic rod. A second rotating frame is fixedly connected to the end of the second spring away from the first rotating frame. Second U-shaped frames are rotatably connected to both sides of the second rotating frame. A mounting base is fixedly connected to the bottom of the second U-shaped frame. A buffer mechanism is fixedly connected to the bottom of the mounting base. The fixed plate is provided with multiple sets and is evenly fixedly connected to the diagonal corners of the bottom of the forming chamber and the pressure chamber.

[0010] Preferably, the buffer mechanism includes a flexible buffer pad with energy-dissipating grooves evenly distributed on its bottom. Energy-dispersing balls are evenly fixedly connected to the bottom portion of the flexible buffer pad located between two adjacent sets of energy-dissipating grooves. The flexible buffer pad is fixedly connected to the bottom of the mounting base. When the device vibrates, the forming chamber and pressure chamber transmit the vibration to the fixed plate, and then to the diagonally opposite first U-shaped frame. The first rotating frame rotates, and the second spring absorbs the vibration energy through elastic deformation. The elastic telescopic rod further buffers and adjusts through extension and retraction. When the first rotating frame rotates, the second rotating frame rotates synchronously under the constraint of the second U-shaped frame, achieving multi-directional buffering. The vibration is transmitted to the mounting base via the second U-shaped frame, and the bottom buffer mechanism buffers it again. The flexible buffer pad absorbs and disperses vibration through its flexibility and the deformation space of the energy-dissipating grooves. The energy-dispersing balls distribute the weight and vibration impact force to multiple contact points, avoiding localized stress concentration.

[0011] This invention provides a pressure balancing and pressure-maintaining device for 3D printing equipment. It has the following beneficial effects: 1. This pressure balancing and pressure-maintaining device for 3D printing equipment uses an accordion-sealed airbag to increase the effective space of the forming chamber, improving the equipment's resistance to pressure fluctuations. When the pressure in the forming chamber decreases slightly, the pressure in the pressure chamber is greater than that in the forming chamber. The accordion seal compresses the forming chamber, and simultaneously opens the second air intake valve to replenish compressed air to the pressure chamber. The control components, combined with the first pressure detector, precisely control the amount of air released. When the pressure increases slightly, the accordion seal expands towards the pressure chamber, opening the second exhaust valve to release pressure and precisely controlling the amount of air released. When the pressure drops sharply and instantaneously, the accordion seal compresses instantly to provide a buffer time for air replenishment, opening the first and second air intake valves for rapid air replenishment through dual channels. The valves close after the pressure stabilizes. When the pressure rises sharply and instantaneously, the accordion seal expands instantly, opening the second exhaust valve to release pressure. If the pressure is still abnormal, the first exhaust valve is quickly and intermittently closed to release air, and the valve closes after stabilization. This achieves precise adaptive adjustment of pressure fluctuations of different magnitudes, maintains stable pressure in the forming chamber, avoids pressure fluctuations affecting printing accuracy, and improves the operational reliability of the 3D printing equipment.

[0012] 2. This pressure balancing and pressure-maintaining device for 3D printing equipment adopts a dual structure of initial sealing with a sealing ring and compression reinforcement with a flexible sealing push plate. This solves the problem of loosening and air leakage caused by traditional connections during long-term operation. When the annular mounting plate is pushed in along the mounting groove, the sealing ring first forms a basic sealing surface to prevent initial gas leakage. Rotating the handle drives the threaded rod to move the wedge block in conjunction, so that the flexible sealing push plate tightly fits the sealing ring and is further compressed, enhancing the fit of the sealing surface, reducing the sealing leakage rate, avoiding pressure imbalance caused by gas leakage, ensuring stable sealing performance, avoiding printing interruptions and product scrapping due to sealing failure, and improving the production qualification rate of 3D printing equipment.

[0013] 3. This pressure balancing and pressure-maintaining device for 3D printing equipment uses a quick-release structure with spring engagement and pull ring unlocking for the connection between the tube and the pipe. Fixing and separation can be completed without professional tools. The fixing post automatically embeds into the first and second fixing grooves under the action of the first spring, achieving a stable connection between the tube and the pipe, improving the vibration resistance after connection, and avoiding loosening of the connection and gas leakage due to vibration during operation. When maintenance or replacement of parts is required, simply pull the pull ring to disengage the fixing post from the fixing groove to complete the separation operation. This ensures the stability of the tube and pipe connection during use and meets the needs of rapid inspection and replacement of parts.

[0014] 4. This pressure balancing and pressure-maintaining device for 3D printing equipment utilizes a diagonal uniform buffer and a flexible buffer pad for secondary shock absorption. This solves the problems of loosening of internal components and pressure imbalance caused by vibration. After the vibration of the forming chamber and pressure chamber is transmitted to the fixed plate, the first U-shaped frame set diagonally, through the rotation of the first and second rotating frames, combined with the elastic deformation of the second spring and the extension and retraction adjustment of the elastic telescopic rod, evenly distributes the vibration energy, avoiding shock absorption failure caused by uneven force on one side. The multi-directional rotating structure can decompose the vibration from the X, Y, and Z directions, preventing the vibration from being concentrated in a specific direction. After the vibration is transmitted to the mounting base, the flexible buffer pad further absorbs and disperses the vibration energy through its own flexibility and the deformation space of the bottom energy dissipation groove. The energy dissipation ball disperses the weight and vibration impact force to multiple contact points, ensuring that the pressure balance between the pressure chamber and the forming chamber is not disturbed by vibration. At the same time, it extends the service life of vulnerable parts such as internal components and valves, ensuring the long-term stable operation of the 3D printing equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the pressure balancing and pressure holding device for 3D printing equipment according to the present invention; Figure 2 This is a schematic diagram of the internal connection structure of the pressure chamber of the present invention; Figure 3 This is a schematic diagram of the connecting pipe structure of the present invention; Figure 4 This is a schematic diagram of the connection structure between the connecting pipe and the connector of the present invention; Figure 5 This is a schematic diagram of the connector structure of the present invention; Figure 6 This is a schematic diagram of the connection structure between the connector and the annular mounting plate of the present invention; Figure 7 This is an enlarged structural diagram of point A in the present invention; Figure 8 This is a schematic diagram of the connection structure of the fixing mechanism of the present invention; Figure 9 This is a schematic diagram of the shock absorption device of the present invention; Figure 10 This is a schematic diagram of the bottom structure of the flexible buffer pad of the present invention.

[0016] In the diagram: 1. Forming chamber; 2. Pressure chamber; 3. Joint; 4. Connecting pipe; 5. Shock absorber; 6. Bellows seal; 7. First intake valve; 8. First exhaust valve; 9. Second intake valve; 10. Second exhaust valve; 11. First pressure detector; 12. Second pressure detector; 13. Control assembly; 31. Pipe body; 32. Second fixing groove; 33. Mounting groove; 34. Limiting groove; 35. Rotating groove; 36. Fixing mechanism; 37. Sealing ring; 41. Pipe; 42. Annular mounting plate; 43. Limiting block; 44. First fixing groove; 51. Fixing plate; 52. First U-shaped frame; 53. First 54. Rotating frame; 55. Second spring; 56. Elastic telescopic rod; 57. Second rotating frame; 58. Second U-shaped frame; 59. Mounting base; 30. Buffer mechanism; 331. Placement groove; 332. First slide groove; 333. Second slide groove; 334. Flexible sealing push plate; 335. Slide rod; 336. First wedge block; 337. Second wedge block; 338. Threaded rod; 339. Handle; 361. Annular sleeve plate; 362. Third slide groove; 363. First spring; 364. Pull rod; 365. Pull ring; 366. Fixed column; 591. Flexible buffer pad; 592. Energy dissipation groove; 593. Energy dissipation ball. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] For the first embodiment, please refer to... Figures 1-2This invention provides a technical solution: a pressure balancing and pressure-holding device for 3D printing equipment, comprising a forming chamber 1 and a pressure chamber 2. Both the forming chamber 1 and the pressure chamber 2 have connectors 3 connected to opposite sides. Two sets of connectors 3 are fixedly connected via connecting pipes 4. Shock-absorbing devices 5 are fixedly connected to the bottom of both the forming chamber 1 and the pressure chamber 2. A bellows seal 6 is fixedly connected to one side of the inner wall of the pressure chamber 2, and the bellows seal 6 is connected to the connectors 3. The side of the forming chamber 1 away from the connectors 3 has an outlet of a first air inlet valve 7 connected to it. The side of the forming chamber 1 away from the connectors 3 has an inlet of a first exhaust valve 8 connected to it. The side of the pressure chamber 2 away from the connectors 3 has an outlet of a second air inlet valve 9 connected to it. The air inlet of the pressure chamber 2 is connected to the air inlet of the second exhaust valve 10. The first pressure detector 11 is fixedly connected to the part of the side of the forming chamber 1 located on the side of the first exhaust valve 8. The second pressure detector 12 is fixedly connected to the part of the side of the pressure chamber 2 located on the side of the second exhaust valve 10. The control component 13 is fixedly connected to the part of the side of the forming chamber 1 located between the first exhaust valve 8 and the first pressure detector 11. The connecting pipe 4 includes a pipe 41. Both ends of the pipe 41 are fixedly connected to annular mounting plates 42. Limiting blocks 43 are evenly fixedly connected to the side of the annular mounting plates 42. The side of the pipe 41 is evenly provided with first fixing grooves 44.

[0019] During use, when small pressure fluctuations occur during printing, the bellows seal 6 effectively increases the space of the forming chamber 1, enhancing the equipment's resistance to pressure fluctuations. When the internal pressure of the forming chamber 1 decreases slightly, the internal pressure of the pressure chamber 2 is greater than that of the forming chamber 1. While compressing the internal space of the bellows seal 6 to pressurize the forming chamber 1, the second air inlet valve 9 opens to supplement compressed air into the pressure chamber 2. The amount of compressed air supplemented is precisely controlled by the control component 13 and the first pressure detector 11 to maintain stable pressure in the forming chamber 1. When the internal pressure of the forming chamber 1 increases slightly, the internal pressure of the pressure chamber 2 is less than that of the forming chamber 1. While the bellows seal 6 expands into the pressure chamber 2, the second exhaust valve 10 opens to release pressure from the pressure chamber 2. The amount of compressed air discharged is precisely controlled by the control component 13 and the first pressure detector 11 to maintain stable pressure in the forming chamber 1. When the internal pressure of the forming chamber 1 drops sharply and instantaneously, the bellows seal 6 is compressed instantly, providing a buffer time for the air replenishment action. At the same time, the first air intake valve 7 and the second air intake valve 9 are opened to quickly replenish air to the forming chamber 1 and the pressure chamber 2, increasing the chamber pressure. The dual-channel air intake allows the chamber pressure to stabilize more quickly. After the first pressure detector 11 detects stability, the first air intake valve 7 and the second air intake valve 9 are closed. When the internal pressure of the forming chamber 1 rises sharply and instantaneously, the bellows seal 6 expands instantly, opening the second exhaust valve 10 to exhaust air from the pressure chamber 2 and release the chamber pressure. When the internal pressure of the forming chamber 1 does not improve significantly and remains sharply elevated for a long time, the first exhaust valve 8 is quickly and intermittently closed to exhaust air from the forming chamber 1 and release the pressure in the forming chamber 1. After the first pressure detector 11 detects stability, the first exhaust valve 8 and the second exhaust valve 10 are closed.

[0020] For the second embodiment, please refer to... Figures 1-7Based on the first embodiment, the present invention provides a technical solution: the connector 3 includes a pipe body 31, with a second fixing groove 32 evenly provided on the side of the pipe body 31, an installation groove 33 provided at one end of the pipe body 31, a limiting groove 34 provided on one side of the inner wall of the installation groove 33, a rotating groove 35 provided on one side of the inner wall of the limiting groove 34, the rotating groove 35 communicating with the installation groove 33, a fixing mechanism 36 sleeved and slidably connected on the pipe body 31, a sealing ring 37 provided on one side of the inner wall of the installation groove 33, the inner wall of the installation groove 33 slidably connected to the side of the annular mounting plate 42, the inner wall of the limiting groove 34 slidably connected to the side of the limiting block 43, the inner wall of the rotating groove 35 slidably connected to the side of the limiting block 43, and a placement groove 331 evenly provided on one side of the inner wall of the installation groove 33. A first groove 332 is provided on one side of the inner wall of the tube 31, and a second groove 333 is provided on one side of the inner wall of the first groove 332. A flexible sealing push plate 334 is provided on the inner wall of the placement groove 331. A slide rod 335 is fixedly connected to one side of the flexible sealing push plate 334. The side of the slide rod 335 is slidably connected to the inner wall of the first groove 332. A first wedge block 336 is fixedly connected to the end of the slide rod 335 away from the flexible sealing push plate 334. A second wedge block 337 is slidably connected to the side of the first wedge block 336. A threaded rod 338 is rotatably connected to the second wedge block 337. A handle 339 is fixedly connected to the top of the threaded rod 338. The side of the second wedge block 337 is slidably connected to the second groove 333. The threaded rod 338 passes through the tube 31 and is threadedly connected to the tube 31.

[0021] During use, the stable sealing of the connection between pressure chamber 2 and forming chamber 1 is crucial for pressure balance. Therefore, when installing pressure chamber 2 and forming chamber 1, the annular mounting plate 42 is pushed in along the mounting groove 33, causing the limiting block 43 to sequentially enter the limiting groove 34 and the rotating groove 35. During the pushing process, the sealing ring 37 provides initial sealing to prevent gas leakage from affecting pressure balance. To prevent the device from loosening during operation, the handle 339 is rotated. The rotation of the handle 339 drives the threaded rod 338 to rotate, which in turn drives the second wedge block 337 to slide within the second sliding groove 333. The first wedge block 336 is pushed, which pushes the slide rod 335 to slide within the first slide groove 332. The slide rod 335 moves the flexible sealing push plate 334 towards the sealing ring 37. The flexible sealing push plate 334 fits tightly against the sealing ring 37, further compressing the sealing ring 37, enhancing the sealing effect, effectively preventing gas leakage, ensuring reliable sealing between the pressure chamber 2 and the forming chamber 1, and preventing loosening or leakage during long-term operation of the device. This ensures the normal operation of the pressure balancing and pressure holding device and improves the stability and printing quality of the 3D printing equipment during the printing process.

[0022] Third embodiment, please refer to Figures 1-8Based on the second embodiment, the present invention provides a technical solution: the fixing mechanism 36 includes an annular sleeve plate 361, the inner wall of the annular sleeve plate 361 is uniformly provided with a third sliding groove 362, two sets of the third sliding groove 362 are provided and symmetrically distributed on the inner wall of the annular sleeve plate 361, a first spring 363 is fixedly connected to the top of the inner wall of the third sliding groove 362, the part of the top of the inner wall of the third sliding groove 362 located inside the first spring 363 passes through and is slidably connected to a pull rod 364, a pull ring 365 is fixedly connected to the top of the pull rod 364, and a fixing post 366 is fixedly connected to the bottom of the pull rod 364, two sets of fixing posts 366 are provided and are slidably connected to the inner walls of the first fixing groove 44 and the second fixing groove 32 respectively, and the annular sleeve plate 361 is sleeved at the connection between the pipe body 31 and the pipe 41.

[0023] In use, after the tube body 31 and the pipe 41 are connected, to further ensure the connection is stable and easy to maintain, the annular sleeve 361 is fitted at the connection position. At this time, the fixing post 366, under the elastic force of the first spring 363, is embedded in the first fixing groove 44 and the second fixing groove 32 respectively, to further fix the tube body 31 and the pipe 41. When it is necessary to maintain the tube body 31 and the pipe 41, simply pull the pull ring 365. The pull ring 365 drives the pull rod 364 to move upward. The pull rod 364 drives the fixing post 366 to compress the first spring 363, so that the fixing post 366 is dislodged from the first fixing groove 44 and the second fixing groove 32. At this time, the tube body 31 and the pipe 41 can be easily separated. The operation is convenient and quick, thus ensuring the stability of the tube body 31 and the pipe 41 during the connection and use process, and meeting the needs of quick disassembly in the case of maintenance or replacement of parts. This greatly improves the stability and practicality of the entire pressure balancing and pressure holding device, and further ensures the stable operation of the 3D printing equipment during the printing process.

[0024] For the fourth embodiment, please refer to [link / reference]. Figures 1-10Based on the third embodiment, the present invention provides a technical solution: the shock absorption device 5 includes a fixed plate 51, with a first U-shaped frame 52 fixedly connected to each diagonal corner of the bottom of the fixed plate 51. A first rotating frame 53 is rotatably connected to the inner wall of the first U-shaped frame 52. A second spring 54 is fixedly connected to one end of the first rotating frame 53. The movable end of an elastic telescopic rod 55 is fixedly connected to the portion of one end of the first rotating frame 53 located inside the second spring 54. A second rotating frame 56 is fixedly connected to the fixed end of the elastic telescopic rod 55. The end of the second spring 54 away from the first rotating frame 53 is fixedly connected to the second rotating frame 56. The rotating frame 56 is rotatably connected to the two sides of the second U-shaped frame 57. The bottom of the second U-shaped frame 57 is fixedly connected to the mounting base 58. The bottom of the mounting base 58 is fixedly connected to the buffer mechanism 59. The fixing plate 51 is provided with multiple sets and is evenly fixedly connected to the bottom diagonally of the forming chamber 1 and the pressure chamber 2. The buffer mechanism 59 includes a flexible buffer pad 591. The bottom of the flexible buffer pad 591 is evenly provided with energy dissipation grooves 592. The part of the bottom of the flexible buffer pad 591 located between two adjacent sets of energy dissipation grooves 592 is evenly fixedly connected to the energy dissipation ball 593. The flexible buffer pad 591 is fixedly connected to the bottom of the mounting base 58.

[0025] In use, when the device vibrates, the forming chamber 1 and pressure chamber 2 transmit the vibration to the fixed plate 51, which in turn transmits it to the first U-shaped frame 52 at the opposite corner. The first rotating frame 53 inside the first U-shaped frame 52 rotates accordingly. At this time, the second spring 54 and the elastic telescopic rod 55 begin to function. The second spring 54 absorbs part of the vibration energy through its elastic deformation, while the elastic telescopic rod 55 further buffers and adjusts the vibration by extending and retracting its movable end and fixed end, dispersing and weakening the vibration energy. The first U-shaped frames 52 are symmetrically arranged at the opposite corners, ensuring that the vibration energy is evenly distributed during transmission and avoiding a decrease in the damping effect due to uneven force on one side. When the first rotating frame 53 rotates, the second rotating frame 56 rotates synchronously under the constraint of the second U-shaped frame 57, forming a multi-directional buffer. This multi-directional buffer can decompose the vibration from different angles, effectively preventing the concentration of vibration in a specific direction. The vibration is transmitted to the mounting base 58, where the buffer mechanism 59 at the bottom of the mounting base 58 further buffers the vibration. The flexible buffer pad 591 absorbs and disperses the vibration through its own flexibility. The energy dissipation groove 592 at its bottom allows the flexible buffer pad 591 to have a larger deformation space when subjected to vibration and compression, which can more fully absorb the vibration through elastic deformation and improve the vibration reduction effect. The energy dissipation ball 593 can distribute the weight of the equipment and the impact force of vibration to multiple contact points, avoid local stress concentration, improve the uniformity of force distribution, and disperse the concentrated vibration energy to the surrounding environment, thereby minimizing the impact of vibration on the device, preventing the internal parts of the device from loosening due to vibration, ensuring the pressure balance between the pressure chamber 2 and the forming chamber 1, ensuring the stable operation of the entire pressure balancing and pressure holding device, and thus improving the stability and printing quality of the 3D printing equipment during the printing process.

[0026] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A pressure balance hold pressure device for a 3D printing apparatus, characterized by: The utility model relates to a kind of pressure chamber and shaping cabin, comprising shaping cabin (1) and pressure chamber (2), the side of shaping cabin (1) and pressure chamber (2) opposite is connected with joint (3), two groups of joint (3) are fixedly connected by connecting pipe (4), the bottom of shaping cabin (1) and pressure chamber (2) is fixedly connected with damping device (5), the inner wall side of pressure chamber (2) is fixedly connected with organ seal cover (6), organ seal cover (6) is communicated with joint (3), the side of shaping cabin (1) away from joint (3) is communicated with the air outlet of first air inlet valve (7), the side of shaping cabin (1) is communicated with the air inlet of first exhaust valve (8), the side of pressure chamber (2) away from joint (3) is communicated with the air outlet of second air inlet valve (9), the side of pressure chamber (2) is communicated with the air inlet of second exhaust valve (10), the portion of shaping cabin (1) side in the side of first exhaust valve (8) is fixedly connected with first pressure detector (11) and is penetrated, the portion of pressure chamber (2) side in the side of second exhaust valve (10) is fixedly connected with second pressure detector (12) and is penetrated, the portion of shaping cabin (1) side between first exhaust valve (8) and first pressure detector (11) is fixedly connected with control assembly (13); The connecting pipe (4) includes a pipeline (41), the both ends of the pipeline (41) are fixedly connected with annular mounting plates (42), the side surfaces of the annular mounting plates (42) are uniformly fixedly connected with limiting blocks (43), and the side surfaces of the pipeline (41) are uniformly provided with first fixing grooves (44).

2. The pressure balance and pressure maintaining device for 3D printing equipment according to claim 1, characterized in that: The joint (3) includes a pipe body (31), the side surfaces of the pipe body (31) are uniformly provided with second fixing grooves (32), one end of the pipe body (31) is provided with a mounting groove (33), the inner wall of the mounting groove (33) is provided with a limiting groove (34) on one side, the inner wall of the limiting groove (34) is provided with a rotating groove (35) on one side, the rotating groove (35) is communicated with the mounting groove (33), the pipe body (31) is sleeved with and slidably connected with a fixing mechanism (36), and the inner wall of the mounting groove (33) is provided with a sealing ring (37) on one side.

3. The pressure balance and pressure maintaining device for 3D printing equipment according to claim 2, characterized in that: The inner wall of the mounting groove (33) is slidably connected with the side surface of the annular mounting plate (42), the inner wall of the limiting groove (34) is slidably connected with the side surface of the limiting block (43), and the inner wall of the rotating groove (35) is slidably connected with the side surface of the limiting block (43).

4. The pressure balance and pressure maintaining device for 3D printing equipment according to claim 2, characterized in that: The inner wall of the installation groove (33) is uniformly provided with a placing groove (331), the inner wall of the placing groove (331) is provided with a first sliding groove (332), the inner wall of the first sliding groove (332) is provided with a second sliding groove (333), the inner wall of the placing groove (331) is provided with a flexible sealing push plate (334), one side of the flexible sealing push plate (334) is fixedly connected with a sliding rod (335), the side surface of the sliding rod (335) is slidably connected with the inner wall of the first sliding groove (332), one end of the sliding rod (335) away from the flexible sealing push plate (334) is fixedly connected with a first wedge block (336), the side surface of the first wedge block (336) is slidably connected with a second wedge block (337), the second wedge block (337) is rotatably connected with a threaded rod (338), and the top of the threaded rod (338) is fixedly connected with a handle (339).

5. The pressure balance and pressure maintaining device for 3D printing equipment according to claim 4, characterized in that: The side surface of the second wedge block (337) is slidably connected with the second sliding groove (333), and the threaded rod (338) penetrates through the pipe body (31) and is threadedly connected with the pipe body (31).

6. The pressure balance and maintaining device for 3D printing equipment according to claim 2, characterized in that: The fixing mechanism (36) comprises an annular sleeve plate (361), the inner wall of the annular sleeve plate (361) is uniformly provided with a third sliding groove (362), the third sliding groove (362) is provided with two groups and is symmetrically distributed on the inner wall of the annular sleeve plate (361), the inner wall of the third sliding groove (362) is fixedly connected with a first spring (363) at the top, and the part of the inner wall of the third sliding groove (362) inside the first spring (363) penetrates and is slidably connected with a pull rod (364).

7. The pressure balance and maintaining device for 3D printing equipment according to claim 6, characterized in that: The fixing column (366) is provided with two groups and is slidably connected with the inner walls of the first fixing groove (44) and the second fixing groove (32) respectively, and the annular sleeve plate (361) is sleeved at the connection between the pipe body (31) and the pipe (41).

8. The pressure balance and pressure maintaining device for 3D printing equipment according to claim 1, characterized in that: The damping device (5) comprises a fixed plate (51), first U-shaped frames (52) are fixedly connected to the bottom opposite corners of the fixed plate (51), first rotating frames (53) are rotatably connected to the inner walls of the first U-shaped frames (52), second springs (54) are fixedly connected to one end of the first rotating frames (53), movable ends of elastic telescopic rods (55) are fixedly connected to the part of one end of the first rotating frames (53) inside the second springs (54), second rotating frames (56) are fixedly connected to the fixed ends of the elastic telescopic rods (55), one end of the second spring (54) away from the first rotating frame (53) is fixedly connected with the second rotating frame (56), second U-shaped frames (57) are rotatably connected to the two sides of the second rotating frame (56), mounting bases (58) are fixedly connected to the bottom of the second U-shaped frames (57), and buffer mechanisms (59) are fixedly connected to the bottom of the mounting bases (58).

9. The pressure balance and pressure maintaining device for 3D printing equipment according to claim 8, characterized in that: The buffer mechanism (59) comprises flexible buffer pads (591), energy dissipation grooves (592) are uniformly arranged on the bottom of the flexible buffer pads (591), and energy dissipation balls (593) are uniformly and fixedly connected to the portions of the flexible buffer pads (591) between the adjacent two energy dissipation grooves (592), and the flexible buffer pads (591) are fixedly connected to the bottom of the mounting base (58).

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