A valve group for supercritical fluid molding

Abstract

The invention discloses a valve group for supercritical fluid compression molding, which relates to the technical field of compression molding valve groups, and comprises a valve body, a main control valve and a sealing component, wherein the sealing component comprises a sealing block and a driving disk, and the main control valve comprises a valve seat, a first cover plate and a second cover plate, and the valve can be replaced by rotating the valve itself through the cooperation of the sealing block with the first cover plate and the second cover plate, so that the valve replacement is faster and more convenient, and a spiral groove is arranged on the first cover plate, and a guide rod, a spherical block and a push ring are arranged on the driving disk, so that when the main control valve is installed, the push ring can apply an upward thrust to the first cover plate, thereby making the spherical block and the guide rod have a force to slide out of the spiral groove, further making the driving disk have a counterclockwise rotation force, further driving the sealing block to rotate, so that the six sealing blocks are always tightly held and have self-tightening ability, further improving the sealing between the valve and the valve body, and thus improving the accuracy of the valve group.

Description

Technical Field

[0001] The invention relates to the technical field of molded valve groups, in particular to a valve group used for supercritical fluid compression molding. Background Art

[0002] A valve group is a collection of valves, that is, several valves are combined into a whole for easy installation and use. Valve groups play an indispensable role in industrial fields such as thermal control. Valve groups are usually composed of multiple valves, and the types of valves can be selected and matched according to specific application scenarios and needs.

[0003] For the valve group formed by supercritical fluid molding, it needs to meet the stability and reliability requirements under high temperature, high pressure and supercritical fluid environment, so the valve group is required to meet the requirements of high temperature and high pressure resistance, good sealing, fluid compatibility and precise control, etc., and although the existing valve group is made of high temperature and high pressure resistant and corrosion resistant materials, the valves of the valve group often need to be frequently opened and closed during use, which makes the valves suffer greater wear and tear, thus resulting in reduced valve accuracy and the need for frequent replacement and maintenance of the valves, and the existing valves and valve group valve bodies are usually connected by flange connection, threaded connection and welding, which makes the valve replacement process slow and takes a lot of time, thus affecting the molding work.

[0004] Therefore, it is necessary to provide a valve group for supercritical fluid compression molding to solve the problems raised in the above background technology. Summary of the invention

[0005] To achieve the above object, the present invention provides the following technical solution: a valve group for supercritical fluid compression molding, comprising a valve body, a main control valve and a sealing assembly, wherein the valve body is provided with a plurality of mounting grooves, the mounting grooves are provided with sealing assemblies, and the main control valve is sealed and mounted on the valve body through the mounting grooves and the sealing assembly;

[0006] The sealing assembly includes a sealing block and a driving disk, wherein the mounting groove is provided with an annular sealing groove, six sealing blocks are rotatably arranged in the sealing groove, a driving rotating groove is provided at the bottom of the mounting groove, the driving disk is rotatably arranged in the driving rotating groove, a support rod is fixedly provided on the sealing block, six driving rods are circumferentially fixedly provided on the driving disk, and a driving groove is provided on the driving rod;

[0007] The driving groove is circumferentially provided with six deflection grooves, the driving rod rotates along the driving groove, the bottom of the sealing groove is provided with six arc grooves, the arc grooves connect the sealing groove and the deflection grooves, the support rod passes through the arc grooves and is inserted into the driving groove.

[0008] Preferably, the sealing block is a hexahedral structure whose four sides are all composed of arc-shaped surfaces, the arc radius of the arc-shaped surface close to the main control valve is the same as the radius of the main control valve, the arc radius of the other three arc-shaped surfaces are the same, and the three arc-shaped surfaces away from the sealing groove are wrapped with sealing gaskets.

[0009] Preferably, six arc-shaped rotating blocks are fixedly arranged in the sealing groove, an arc-shaped rotating groove is opened on the sealing block, the arc-shaped rotating block rotates along the arc-shaped rotating groove, and the center of the arc-shaped rotating groove coincides with a vertical side of the sealing block.

[0010] Preferably, the main control valve comprises a valve seat, a first cover plate and a second cover plate, wherein the first cover plate and the second cover plate are fixedly arranged on the valve seat at intervals, an annular space is formed between the first cover plate and the second cover plate, and the sealing block can slide sealingly along the annular space.

[0011] Preferably, a plurality of T-shaped spiral grooves are formed at the bottom of the first cover plate;

[0012] A guide rod is fixedly arranged on the driving disc, and a spherical block is fixedly arranged on the guide rod. The guide rod and the spherical block can be inserted into the spiral groove and slide along the spiral groove.

[0013] Preferably, an annular sliding groove is provided on the driving disk, a push ring is provided in the sliding groove through a spring sliding, and the first cover plate can push the push ring to slide.

[0014] Preferably, a gear ring is provided on the second cover plate, a plurality of arc-shaped clamping plates are provided on the top of the mounting groove for circular rotation, an arc-shaped rack is provided at the output end of the arc-shaped clamping plate for limited sliding, and the arc-shaped rack can mesh with the gear ring.

[0015] Preferably, a tightening ring is rotatably provided on the top of the mounting groove through a threaded connection, a plurality of arc-shaped torsion grooves are provided on the tightening ring, a torsion rod is fixedly provided on the arc-shaped clamping plate, a plurality of vertical grooves for the torsion rod to slide are provided on the valve body, and the torsion rod passes through the vertical grooves and slides along the torsion grooves.

[0016] Preferably, it also includes a safety valve, a stop valve, a throttle valve, a pressure gauge and a control system, wherein the safety valve, the stop valve and the throttle valve have the same structure as the main control valve and all three are sealed and installed in the installation groove through a sealing assembly, and the pressure gauge is used to monitor the pressure data inside the valve body in real time and transmit this data information to the control system.

[0017] Compared with the prior art, the present invention provides a valve group for supercritical fluid compression molding, which has the following beneficial effects:

[0018] The present invention provides a sealing assembly, and the cooperation of the sealing block in the sealing assembly with the first cover plate and the second cover plate makes the replacement of the main control valve and other valves faster and more convenient. The valve can be replaced only by rotating the valve itself, and the replaced valve can be sealed and connected to the valve body to further ensure its sealing performance. A spiral groove is provided on the first cover plate, and a guide rod, a spherical block and a push ring are provided on the driving disk, so that when the main control valve is installed, the push ring can apply an upward thrust to the first cover plate, thereby making the spherical block and the guide rod have the force to slide out of the spiral groove, further making the driving disk have a counterclockwise rotation force, further driving the sealing block to rotate, so that the six sealing blocks are always tightly held and have self-tightening ability, further improving the sealing performance between the valve and the valve body, and thus improving the accuracy of the valve group. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the internal structure of the installation slot in the present invention;

[0021] Figure 3 It is a structural schematic diagram of the arc-shaped clamping plate in the present invention;

[0022] Figure 4 It is a schematic diagram of the structure of the sealing groove and the driving groove in the present invention;

[0023] Figure 5 It is a structural schematic diagram of the main control valve in the present invention;

[0024] Figure 6 It is a structural schematic diagram of the sealing block in the present invention;

[0025] Figure 7 It is a schematic diagram of the structure of the driving disk in the present invention;

[0026] Figure 8 It is a schematic diagram of the structure of the tightening ring in the present invention;

[0027] In the figure: 1. valve body; 11. mounting groove; 12. sealing groove; 121. arc-shaped rotating block; 13. driving rotating groove; 14. deflection groove; 15. arc-shaped groove; 16. arc-shaped clamping plate; 161. torsion bar; 17. arc-shaped rack; 18. tightening ring; 181. torsion groove; 2. main control valve; 21. valve seat; 22. first cover plate; 221. spiral groove; 23. second cover plate; 231. gear ring; 3. sealing assembly; 31. sealing block; 311. support rod; 312. arc-shaped rotating groove; 32. driving disk; 321. driving rod; 322. driving groove; 323. guide rod; 324. spherical block; 325. slide groove; 326. push ring; 4. safety valve; 5. stop valve; 6. throttle valve; 7. pressure gauge. DETAILED DESCRIPTION

[0028] See also Figures 1 to 8 In an embodiment of the present invention, a valve group for supercritical fluid compression molding includes a valve body 1, a main control valve 2 and a sealing assembly 3, wherein the valve body 1 is provided with a plurality of mounting grooves 11, the mounting grooves 11 are provided with sealing assemblies 3, and the main control valve 2 is sealed and installed on the valve body 1 through the mounting grooves 11 and the sealing assemblies 3;

[0029] The sealing assembly 3 includes a sealing block 31 and a driving disk 32, wherein the installation groove 11 is provided with an annular sealing groove 12, six sealing blocks 31 are rotatably arranged in the sealing groove 12, a driving rotating groove 13 is provided at the bottom of the installation groove 11, and the driving disk 32 is rotatably arranged in the driving rotating groove 13, a support rod 311 is fixedly arranged on the sealing block 31, six driving rods 321 are circumferentially fixedly arranged on the driving disk 32, and a driving groove 322 is provided on the driving rod 321;

[0030] The driving groove 13 is provided with six deflection grooves 14 in a circumferential shape, and the driving rod 321 rotates along the driving groove 13. The bottom of the sealing groove 12 is provided with six arc grooves 15, and the arc grooves 15 connect the sealing groove 12 and the deflection groove 14. The support rod 311 passes through the arc grooves 15 and is inserted into the driving groove 322.

[0031] The main control valve 2 comprises a valve seat 21, a first cover plate 22 and a second cover plate 23, wherein the first cover plate 22 and the second cover plate 23 are fixedly arranged on the valve seat 21 at intervals, an annular space is formed between the first cover plate 22 and the second cover plate 23, and the sealing block 31 can slide in a sealing manner along the annular space;

[0032] A plurality of T-shaped spiral grooves 221 are formed at the bottom of the first cover plate 22, and the spiral grooves 221 are arranged to spiral upward in a counterclockwise direction;

[0033] A guide rod 323 is fixedly disposed on the driving disk 32, and a spherical block 324 is fixedly disposed on the guide rod 323. The guide rod 323 and the spherical block 324 can be inserted into the spiral groove 221 and slide along the spiral groove 221.

[0034] The driving disk 32 is provided with an annular sliding groove 325, in which a push ring 326 is provided for sliding movement via a spring, and the first cover plate 22 can push the push ring 326 to slide;

[0035] The second cover plate 23 is provided with a gear ring 231, and a plurality of arc-shaped clamping plates 16 are provided on the top of the mounting groove 11 in a circular rotation manner. An arc-shaped rack 17 is provided at the output end of the arc-shaped clamping plate 16 for limited sliding, and the arc-shaped rack 17 can mesh with the gear ring 231;

[0036] A tightening ring 18 is rotatably provided on the top of the mounting groove 11 through a threaded connection, and a plurality of arc-shaped twisting grooves 181 are provided on the tightening ring 18. A torsion rod 161 is fixedly provided on the arc-shaped clamping plate 16. A plurality of vertical grooves for the torsion rod 161 to slide are provided on the valve body 1. The torsion rod 161 passes through the vertical grooves and slides along the twisting grooves 181.

[0037] During implementation, the main control valve 2 is placed in the installation groove 11, and then the first cover plate 22 is pressed on the driving disk 32, and the guide rod 323 and the spherical block 324 are aligned with the spiral groove 221, and then the main control valve 2 is rotated counterclockwise, so that the first cover plate 22 is rotated and the guide rod 323 and the spherical block 324 are rotated to the end of the spiral groove 221, that is, the spherical block 324 is completely stuck in the spiral groove 221. During this process, the first cover plate 22 will slide downward and press on the bottom of the installation groove 11, and push the push ring 326 to slide into the slide groove 325. At this time, the second cover plate 23 is just located at the top of the installation groove 11, and the sealing groove 12 is connected to the annular space, and then the main control valve 2 is continued to be rotated counterclockwise. The main control valve 2 is controlled by the first cover plate 22, so that the first cover plate 22 can drive the driving disk 32 to rotate through the guide rod 323, thereby causing the support rod 311 to slide along the driving groove 322, and further causing the support rod 311 to slide along the arc groove 15, thereby causing the six sealing blocks 31 to rotate out of the sealing groove 12, and then when the inner side of the sealing block 31 is sealed with the main control valve 2, the six sealing blocks 31 can form a sealing ring body and seal the annular space. At this time, the sealing block 31 can be further pressed on the first cover plate 22, and then the tightening ring 18 is rotated to make the gear ring 231 mesh with the arc rack 17, thereby clamping the second cover plate 23, that is, clamping the main control valve 2. At this time, the first cover plate 22 is locked. A cover plate 22 seals and covers the bottom of the installation groove 11, and the six sealing blocks 31 further seal and hold the main control valve 2, thereby sealing and installing the main control valve 2 on the valve body 1. After the installation is completed, the push ring 326 will squeeze the spring at the bottom of the push ring 326 when sliding into the slide groove 325, so that the push ring 326 has an upward push force after the installation is completed, that is, the first cover plate 22 has an upward force. At this time, since the spherical block 324 and the guide rod 323 are located in the spiral groove 221, when the first cover plate 22 slides upward, the spherical block 324 needs to slide out of the spiral groove 221 first, that is, the spherical block 324 and the driving disk 32 have a knob force in the counterclockwise direction, which further makes the driving disk 32 have a The force driving the sealing block 31 to rotate makes the sealing block 31 always in a tightened state, that is, after installation, the sealing block has a self-tightening function, further improving the sealing between the main control valve 2 and the valve body 1, and thus improving the overall accuracy of the valve group. When the main control valve 2 needs to be replaced, the tightening ring 18 is loosened at this time, that is, the second cover plate 23 is loosened to make the main control valve 2 active, and then the main control valve 2 is pressed and rotated clockwise to make the driving disk 32 rotate and drive the sealing block 31 to rotate. Then, after the sealing block 31 is completely transferred into the sealing groove 12, the main control valve 2 is stopped from being pressed and the main control valve 2 is continued to be rotated clockwise to make the guide rod 323 and the spherical block 324 disengage from the spiral groove 221.Simply remove the main control valve 2 and install a new main control valve 2, thereby making the replacement of the main control valve 2 more convenient and quick.

[0038] The sealing block 31 is a hexahedral structure whose four sides are all composed of arc-shaped surfaces. The arc radius of the arc-shaped surface close to the main control valve 2 is the same as the radius of the main control valve 2, and the arc radii of the other three arc-shaped surfaces are the same, and the three arc-shaped surfaces away from the sealing groove 12 are wrapped with sealing gaskets;

[0039] Six arc-shaped rotating blocks 121 are fixedly arranged in the sealing groove 12 . An arc-shaped rotating groove 312 is opened on the sealing block 31 . The arc-shaped rotating blocks 121 rotate along the arc-shaped rotating groove 312 , and the center of the arc-shaped rotating groove 312 coincides with a vertical side of the sealing block 31 .

[0040] The center of the arc-shaped groove 312 coincides with a vertical side of the sealing block 31, so that the sealing block 31 rotates around one of its vertical sides during rotation, so that two adjacent sealing blocks 31 can fit together during the rotation process, and after the sealing block 31 fits on the valve seat 21, the six sealing blocks 31 can be completely sealed and fitted to form an annular sealing whole, thereby sealing the annular space, so that the main control valve 2 and the valve body 1 can be sealed and connected.

[0041] In this embodiment, Figure 1 , also includes a safety valve 4, a stop valve 5, a throttle valve 6, a pressure gauge 7 and a control system, wherein the safety valve 4, the stop valve 5 and the throttle valve 6 have the same structure as the main control valve 2 and all three are sealed and installed in the installation groove 11 through a sealing component 3, and the pressure gauge 7 is used to monitor the pressure data inside the valve body 1 in real time and transmit this data information to the control system.

[0042] Correspondingly, the installation and disassembly steps of the safety valve 4, the stop valve 5 and the throttle valve 6 are the same as the installation and disassembly steps of the main control valve 2, thereby making the replacement of the valves of the entire valve group more convenient and quick.

[0043] In summary, the present invention provides a sealing assembly 3. Through the cooperation of the sealing block 31 in the sealing assembly 3 with the first cover plate 22 and the second cover plate 23, the replacement of the main control valve 2 and other valves is faster and more convenient. The valve can be replaced by simply rotating the valve itself, and the replaced valve can be sealed and connected to the valve body 1 to further ensure its sealing performance. A spiral groove 221 is provided on the first cover plate 22, and a guide rod 323, a spherical block 324 and a push ring 326 are provided on the drive disk 32. When the main control valve 2 is installed, the push ring 326 can apply an upward thrust to the first cover plate 22, thereby making the spherical block 324 and the guide rod 323 have the force to slide out of the spiral groove 221, further making the drive disk 32 have a counterclockwise rotation force, further driving the sealing block 31 to rotate, so that the six sealing blocks 31 are always tightly held and have self-tightening ability, further improving the sealing performance between the valve and the valve body 1, and thus improving the accuracy of the valve group.

[0044] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A valve group for supercritical fluid compression molding, characterized in that: The invention comprises a valve body (1), a main control valve (2) and a sealing assembly (3), wherein the valve body (1) is provided with a plurality of mounting grooves (11), the sealing assembly (3) is arranged in the mounting grooves (11), and the main control valve (2) is sealingly mounted on the valve body (1) via the mounting grooves (11) and the sealing assembly (3); The sealing assembly (3) comprises a sealing block (31) and a driving disk (32), wherein the installation groove (11) is provided with an annular sealing groove (12), six sealing blocks (31) are rotatably arranged in the sealing groove (12), a driving rotating groove (13) is provided at the bottom of the installation groove (11), the driving disk (32) is rotatably arranged in the driving rotating groove (13), a support rod (311) is fixedly arranged on the sealing block (31), six driving rods (321) are circumferentially fixedly arranged on the driving disk (32), and a driving groove (322) is provided on the driving rod (321); The driving groove (13) is provided with six deflection grooves (14) in a circumferential shape, the driving rod (321) rotates along the driving groove (13), the bottom of the sealing groove (12) is provided with six arc grooves (15), the arc grooves (15) connect the sealing groove (12) and the deflection groove (14), and the support rod (311) passes through the arc grooves (15) and is inserted into the driving groove (322); The main control valve (2) comprises a valve seat (21), a first cover plate (22) and a second cover plate (23), wherein the first cover plate (22) and the second cover plate (23) are fixedly arranged on the valve seat (21) at an interval, an annular space is formed between the first cover plate (22) and the second cover plate (23), and the sealing block (31) can slide in a sealing manner along the annular space; A plurality of T-shaped spiral grooves (221) are formed at the bottom of the first cover plate (22); A guide rod (323) is fixedly arranged on the driving disk (32), and a spherical block (324) is fixedly arranged on the guide rod (323). The guide rod (323) and the spherical block (324) can be inserted into the spiral groove (221) and slide along the spiral groove (221).

2. A valve group for supercritical fluid compression molding according to claim 1, characterized in that: The sealing block (31) is a hexahedral structure whose four sides are all composed of arcuate surfaces. The arc radius of the arcuate surface on the side close to the main control valve (2) is the same as the radius of the main control valve (2), and the arc radii of the other three arcuate surfaces are the same. The three arcuate surfaces away from the sealing groove (12) are wrapped with sealing gaskets.

3. The valve group for supercritical fluid compression molding according to claim 1, characterized in that: Six arc-shaped rotating blocks (121) are fixedly arranged in the sealing groove (12), an arc-shaped rotating groove (312) is opened on the sealing block (31), the arc-shaped rotating block (121) rotates along the arc-shaped rotating groove (312), and the center of the arc-shaped rotating groove (312) coincides with a vertical side of the sealing block (31).

4. The valve group for supercritical fluid compression molding according to claim 1, characterized in that: The driving disk (32) is provided with an annular sliding groove (325), in which a push ring (326) is provided for sliding movement via a spring, and the first cover plate (22) can push the push ring (326) to slide.

5. The valve group for supercritical fluid compression molding according to claim 1, characterized in that: A gear ring (231) is provided on the second cover plate (23), a plurality of arc-shaped clamping plates (16) are provided at the top of the mounting groove (11) to rotate in a circular manner, an arc-shaped rack (17) is provided at the output end of the arc-shaped clamping plate (16) to limit sliding movement, and the arc-shaped rack (17) can mesh with the gear ring (231).

6. The valve group for supercritical fluid compression molding according to claim 5, characterized in that: A tightening ring (18) is rotatably provided at the top of the mounting groove (11) via a threaded connection, and a plurality of arc-shaped twisting grooves (181) are provided on the tightening ring (18). A torsion rod (161) is fixedly provided on the arc-shaped clamping plate (16), and a plurality of vertical grooves for the torsion rod (161) to slide are provided on the valve body (1), and the torsion rod (161) passes through the vertical grooves and slides along the twisting grooves (181).

7. The valve group for supercritical fluid compression molding according to claim 1, characterized in that: It also includes a safety valve (4), a stop valve (5), a throttle valve (6), a pressure gauge (7) and a control system, wherein the safety valve (4), the stop valve (5) and the throttle valve (6) have the same structure as the main control valve (2) and are all sealed and installed in the installation groove (11) through a sealing component (3), and the pressure gauge (7) is used to monitor the pressure data inside the valve body (1) in real time and transmit this data information to the control system.

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