Multifunctional vacuum concentration cover plate

Abstract

The utility model relates to a multifunctional vacuum concentration cover plate, which is characterized in that a cover plate main body is respectively provided with a vacuum component and a cover plate heating component, the vacuum component is used for pumping vessels on each station to be vacuum or can be used for pumping steam generated by volatilization in the vessels, and the cover plate heating component is used for heating the vessels. The cover plate heating component prevents air from being condensed on the cover plate body through heating, cover plate hinges are symmetrically arranged on one side of the cover plate body and can control the opening and closing angle of the cover plate body through limiting and damping structures, and a locking component is arranged on the other side of the cover plate body and used for closing and locking. The device is provided with the main flow channel and the branch flow channels, pressure distribution is uniform, each station is provided with a Tesla valve flow channel, volatile samples are prevented from flowing back, each station is provided with a filter disc, a foaming sample is prevented from polluting a system, the device has a cover plate heating function, and condensed external liquid is prevented from entering the samples to cause cross contamination.

Description

Technical Field

[0001] The utility model relates to a multifunctional vacuum concentration cover plate. Background Art

[0002] In chemical analysis and testing experiments, the concentration process of liquid samples is the most widely used experimental process. There are two conventional concentration methods. One is atmospheric pressure gas purge concentration, such as nitrogen purge concentrator. The other is negative pressure vacuum concentrator, such as rotary evaporator, vacuum parallel concentrator, etc. Compared with atmospheric pressure gas purge concentration, vacuum parallel concentrator has irreplaceable advantages in low boiling point liquid samples, easily oxidized liquid samples, solvent toxicity and corrosive liquid samples. Since the boiling point of the solvent under vacuum is much lower than the boiling point under normal pressure, and there is no need to provide a high heating temperature for the solvent when concentrating under vacuum, it can also evaporate quickly to achieve the concentration effect. At the same time, evaporation at a lower temperature, because the material is not affected by high temperature, the destruction and loss of thermally unstable components are avoided, and the nutrients and aroma of the raw materials are better preserved. In particular, certain amino acids, flavonoids, phenols, vitamins and other substances can be prevented from being destroyed by heat. For some viscous materials such as sugars, proteins, pectin, mucilage, etc., low-temperature evaporation can prevent the material from coking. Therefore, vacuum concentration is widely used in environmental protection, medicine and health, pharmaceuticals, disease control centers, petroleum, chemical industry, commodity inspection, food safety, aquatic products, agriculture, biology, university scientific research and other fields.

[0003] As one of the important components of the vacuum parallel concentrator, the function of the vacuum concentration cover is to seal the concentrating vessel. On this basis, it should also take into account solutions to condensation, cross contamination, and ease of operation.

[0004] Based on the above, the existing products have the following deficiencies in use:

[0005] First, the common sealing cover plate structure adopts an overall gas path layout or a separate gas path layout. For the existing overall layout, due to the different volatilization rates and the pressure balance with the outside atmosphere after concentration, backflow or gas crossover will occur between channels during actual use, causing cross-contamination problems; for the separate gas path layout, although each channel has an independent gas pipeline, these independent gas paths are all gathered in an overall negative pressure pipeline, and a certain amount of backflow will still occur, causing the same problem as the existing overall gas path layout.

[0006] Second, the common independent sealing cover structure adopts the method of up and down installation, such as CN 109999520 A, that is, the sealing cover plate is manually moved upwards to remove the screw or installed through the screw downwards, and the seal is locked with a nut. In daily experiments, it consumes the operator's physical strength, has low efficiency, and is complicated to operate.

[0007] Third, in daily experiments, the volatile solvent will absorb heat in the air, causing the atmosphere to condense on the cover. When the cover is removed at the end of the experiment, the condensed water will fall into the sample vessel, causing sample contamination or requiring additional water removal steps, seriously affecting the accuracy and efficiency of the experiment.

[0008] Fourth, in daily experiments, individual samples may have problems such as foaming. The foam and the samples and impurities they carry will contaminate the gas path, valves, sensors and other components behind them. Cleaning is time-consuming and laborious, which seriously affects the efficiency of the experiment. Utility Model Content

[0009] The utility model provides a multifunctional vacuum concentration cover plate, which is provided with a main flow channel and a branch flow channel, with uniform pressure distribution, and each station is provided with a Tesla valve flow channel to prevent the volatilized sample from flowing back. Each station is provided with a filter to prevent the foaming sample from contaminating the system. The cover plate has a heating function to prevent the condensed external liquid from entering the sample and causing cross contamination.

[0010] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0011] A multifunctional vacuum concentration cover, characterized in that: a vacuum component and a cover heating component are respectively arranged on the cover body, the vacuum component is used to draw a vacuum into a vessel on each workstation, or can draw the steam generated by volatilization in the vessel, the cover heating component prevents air condensation on the cover body by heating, a cover hinge is symmetrically arranged on one side of the cover body, the cover hinge can control the opening and closing angle of the cover body through a limit and damping structure, and a locking component is arranged on the other side of the cover body for closing and locking.

[0012] The multifunctional vacuum concentration cover plate, wherein: the vacuum component includes a main channel and branch channels, a Tesla valve channel and a work station protrusion, an anti-bending sleeve is arranged in the vacuum tube seat, the anti-bending sleeve is sealed and connected to the vacuum tube through a vacuum tube lock nut, the vacuum tube is connected to an external vacuum pump, the anti-bending sleeve is also sealed and connected to the main channel and branch channels through a vacuum source hollow joint, the main channel and branch channels are sealed and connected to the work station protrusion through the Tesla valve channel, and a vacuum source sealing ring is arranged at the vacuum source hollow joint for sealing.

[0013] The multifunctional vacuum concentration cover plate, wherein: the work station protrusion is sealed and connected with the work station sealing hollow screw, the second sealing gasket and the first sealing gasket are stacked in sequence, and are fixed at the corresponding position of the work station protrusion through the work station sealing hollow screw, and a filter is arranged on the work station sealing hollow screw to capture bubbles and impurities in the bubbles.

[0014] The multifunctional vacuum concentration cover, wherein: the outer surface of the cover body is sealed to the glass cover through a glass cover sealing ring, and the cover body is also fixed to the glass cover through a glass cover mounting knob, and a glass cover mounting sealing ring is arranged in the stud of the glass cover mounting knob for sealing.

[0015] The multifunctional vacuum concentration cover plate, wherein: the cover plate heating component includes a heating wire and a protective cover, the heating wire is set on the inner surface of the cover plate body by interference fit or bonding, a terminal block is set in the protective cover, the terminal block is electrically connected to the heating wire and a temperature sensor, the temperature sensor transmits a temperature signal to a controller for the controller to control the heating temperature of the heating wire, the terminal block is also electrically connected to an external power supply through a wire, and a wire guard is set on the wire.

[0016] The multifunctional vacuum concentration cover, wherein: the cover hinge includes a cover hinge seat and an installation hinge seat, the cover hinge seat is fixed in the pin hole of the cover body by screws, the cover hinge seat is slidably connected to the installation hinge seat by a damping hinge, the damping hinge can control the opening and closing angle of the cover body, and the installation hinge seat is fixed on the frame of the vacuum parallel concentrator.

[0017] The multifunctional vacuum concentration cover, wherein: the cover hinge seat and the mounting hinge seat are provided with through holes and positioning grooves for installing and limiting the position of the damping hinge, the cover hinge seat is provided with an angle limit groove, the mounting hinge seat is provided with a positioning pin, one end of the positioning pin is inserted into the angle limit groove, and the positioning pin can move in the angle limit groove.

[0018] The multifunctional vacuum concentration cover, wherein: the locking component includes a lock, a spring and a locking seat, the locking seat is fixedly mounted on the cover body, the lock is fixed in the locking seat by an axial screw, the lock can rotate, the spring is arranged in the locking seat, the spring is in contact with the lock, and the lock is reset by elastic force, and a handle is arranged on the cover body.

[0019] The beneficial effects of the utility model are as follows: the pressure can be evenly distributed by utilizing the main flow channel and branch flow channels, and each station is provided with a Tesla valve flow channel to prevent the volatilized sample from flowing back. Each station is provided with a filter to prevent the foaming sample from contaminating the system, and the cover plate has a heating function to prevent the condensed external liquid from entering the sample and causing cross contamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of a multifunctional vacuum concentration cover.

[0021] Figure 2 This is a structural diagram of the vacuum components of the multifunctional vacuum concentration cover.

[0022] Figure 3 This is the AA cross-sectional structure diagram of the vacuum component of the multifunctional vacuum concentration cover.

[0023] Figure 4 This is an enlarged structural diagram of the vacuum component B of the multifunctional vacuum concentration cover.

[0024] Figure 5 This is a structural diagram of the cover heating component of the multifunctional vacuum concentration cover.

[0025] Figure 6 This is a structural diagram of the cover hinge of the multifunctional vacuum concentration cover.

[0026] Figure 7 This is a structural diagram of the locking components of the multifunctional vacuum concentration cover.

[0027] Description of reference numerals: 10-vacuum component; 101-cover body; 1011-main channel and branch channel; 1012-Tesla valve channel; 1013-station protrusion; 1014-pin hole; 102-vacuum tube; 103-anti-bending sleeve; 104-vacuum tube lock nut; 105-vacuum tube seat; 106-vacuum source sealing ring; 107-vacuum source hollow joint; 108-glass cover sealing ring; 109-glass cover installation sealing ring; 110-glass cover; 111-glass cover installation knob; 112-glass cover; 113-glass cover installation knob; 114-glass cover installation knob; 115-glass cover installation knob; 116-glass cover; 117-glass cover installation knob; 118-glass cover; 119-glass cover installation knob; 120-glass cover; 121-glass cover installation knob; 122-glass cover; 123-glass cover installation knob; 124-glass cover installation knob; 125-glass cover; 126-glass cover installation knob; 127-glass cover installation knob; 128-glass cover; 129-glass cover installation knob; 130-glass cover; 131-glass cover installation knob; 132-glass cover; 133-glass cover installation knob; 134-glass cover installation knob; 135-glass cover installation knob; 136-glass cover; 137-glass cover installation knob; 138-glass cover 2-first sealing gasket; 113-second sealing gasket; 114-station sealing hollow screw; 115-filter; 20-cover heating component; 201-heating wire; 202-temperature sensor; 203-terminal block; 204-conducting wire; 205-protective cover; 30-cover hinge; 301-cover hinge seat; 302-damping hinge; 303-installing hinge seat; 304-pin; 40-locking component; 401-handle; 402-lock buckle; 403-axial screw; 404-spring; 405-locking seat. DETAILED DESCRIPTION

[0028] like Figures 1 to 7A multifunctional vacuum concentration cover is shown, characterized in that a vacuum component 10 and a cover heating component 20 are respectively arranged on the cover body 101, the vacuum component 10 is used to draw a vacuum into a vessel on each workstation, or can draw the steam generated by volatilization in the vessel, the cover heating component 20 prevents air condensation on the cover body 101 by heating, a cover hinge 30 is symmetrically arranged on one side of the cover body 101, the cover hinge 30 can control the opening and closing angle of the cover body 101 through a limiting and damping structure, a locking component 40 is arranged on the other side of the cover body 101 for closed locking, the cover body 101 is generally made of aluminum alloy, and the surface is hard anodized for corrosion protection.

[0029] The vacuum component 10 includes a main channel and a branch channel 1011, a Tesla valve channel 1012 and a work station protrusion 1013. An anti-bending sleeve 103 is arranged in the vacuum tube seat 105. The anti-bending sleeve 103 is sealed and connected to the vacuum tube 102 through a vacuum tube lock nut 104. The vacuum tube 102 is connected to an external vacuum pump. The anti-bending sleeve 103 is also sealed and connected to the main channel and the branch channel 1011 through a vacuum source hollow joint 107. The main channel and the branch channel 1011 are sealed and connected to the work station protrusion 1013 through the Tesla valve channel 1012. The work station protrusion 1013 is sealed and connected to the work station sealing hollow screw 114. The second sealing gasket 113 and the first sealing gasket 112 are stacked in sequence and connected to the work station sealing hollow screw 114 through the work station sealing hollow screw 114. The screw 114 is fixed at the position corresponding to the work station protrusion 1013. The first sealing gasket 112 is made of rubber and has soft elasticity. The second sealing gasket 113 has a PTFE film on one side facing the vessel and is made of rubber on the other side. The work station sealing hollow screw 114 is made of corrosion-resistant plastic material, preferably polyetheretherketone. The work station sealing hollow screw 114 is a hollow screw with a slot on the head for installation. A filter 115 is arranged on the work station sealing hollow screw 114 to trap bubbles and impurities in the bubbles. The filter 115 is sintered from stainless steel or corrosion-resistant plastic to play a filtering role. It is preferably made of PP or PE. A vacuum source sealing ring 106 is arranged at the vacuum source hollow joint 107 for sealing.

[0030] The outer surface of the cover body 101 is sealed and fitted with the glass cover 110 through a glass cover sealing ring 108. The cover body 101 is also fixed to the glass cover 110 through a glass cover mounting knob 111. A glass cover mounting sealing ring 109 is arranged in the stud of the glass cover mounting knob 111 for sealing. The glass cover 110 is made of tempered glass with strong rigidity.

[0031] The cover heating component 20 includes a heating wire 201 and a protective cover 205. The heating wire 201 is set on the inner surface of the cover body 101 by interference fit or bonding. A terminal block 203 is set in the protective cover 205. The terminal block 203 is electrically connected to the heating wire 201 and a temperature sensor 202. The temperature sensor 202 transmits a temperature signal to a controller for the controller to control the heating temperature of the heating wire 201. The terminal block 203 is also electrically connected to an external power supply through a wire 204, and a wire guard ring is set on the wire 204.

[0032] The cover hinge 30 includes a cover hinge seat 301 and an installation hinge seat 303. The cover hinge seat 301 is fixed to the pin hole 1014 of the cover body 101 by screws. The cover hinge seat 301 and the installation hinge seat 303 are provided with through holes and positioning grooves for installing and limiting the position of the damping hinge 302. The cover hinge seat 301 is slidably connected to the installation hinge seat 303 through the damping hinge 302. An angle limiting groove is provided on the cover hinge seat 301, and a positioning pin is provided on the installation hinge seat 303. One end of the positioning pin is inserted into the angle limiting groove, and the positioning pin can move in the angle limiting groove. The damping hinge 302 can control the opening and closing angle of the cover body 101, and the installation hinge seat 303 is fixed to the shelf of the vacuum parallel concentrator.

[0033] The locking component 40 includes a lock buckle 402, a spring 404 and a locking seat 405. The locking seat 405 is fixedly installed on the cover body 101. The lock buckle 402 is fixed in the locking seat 405 by an axial screw 403. The lock buckle 402 can rotate. The spring 404 is arranged in the locking seat 405. The spring 404 is in contact with the lock buckle 402 so that the lock buckle 402 can be reset by elastic force. The handle 401 is arranged on the cover body 101.

[0034] When used in the embodiment, the cover body 101 is closed by the locking component 40, the second sealing gasket 113 contacts and seals the vessel, and the external vacuum pump is started. The external vacuum pump can draw the vessel on each station into a vacuum through the vacuum component 10, or can draw the steam generated by volatilization in the vessel, start the external power supply, and supply power to the heating wire 201 through the terminal block 203. The heating wire 201 heats the cover body 101, and the temperature sensor 202 transmits the temperature signal to the controller for the controller to control the heating temperature of the heating wire 201 to keep the temperature within the set temperature range. When the vacuum parallel concentrator is running, the heating wire 201 prevents condensation on the cover body 101 by heating, and the main flow channel and the branch flow channel are The channel 1011 and the Tesla valve channel 1012 are designed as anti-backflow channels to avoid the backflow of condensed liquid. The work station protrusion 1013 is designed with a high and low depth to avoid the backflow of condensed liquid. A filter 115 is arranged on the work station sealing hollow screw 114. The filter 115 can effectively intercept the bubbles generated in the vessel and the impurities in the bubbles. After the vacuum parallel concentrator is finished running, the vacuum component 10 will prevent the gas from flowing back into the sample vessel due to the action of the Tesla valve channel 1012. The lock buckle 402 is turned to unlock the cover body 101 and the vacuum parallel concentrator. The handle 401 is pulled to open the cover body 101. The cover body 101 can control the opening and closing angle through the damping hinge 302.

[0035] The above description is only illustrative and not restrictive of the present invention. Those skilled in the art will understand that many modifications, changes or equivalents may be made without departing from the spirit and scope defined by the claims, but all will fall within the scope of protection of the present invention.

Claims

1. A multifunctional vacuum concentration cover plate, characterized in that: A vacuum component (10) and a cover heating component (20) are respectively arranged on the cover body (101); the vacuum component (10) is used to draw a vacuum from a vessel at each workstation, or to draw steam generated by volatilization in the vessel; the cover heating component (20) prevents air from condensing on the cover body (101) by heating; a cover hinge (30) is symmetrically arranged on one side of the cover body (101); the cover hinge (30) can control the opening and closing angle of the cover body (101) through a limit and damping structure; and a locking component (40) is arranged on the other side of the cover body (101) for closing and locking.

2. A multifunctional vacuum concentration cover plate as claimed in claim 1, characterized in that: The vacuum component (10) comprises a main flow channel and a branch flow channel (1011), a Tesla valve flow channel (1012) and a work station protrusion (1013); an anti-bending sleeve (103) is arranged in the vacuum tube seat (105); the anti-bending sleeve (103) is sealedly connected to the vacuum tube (102) through a vacuum tube lock nut (104); the vacuum tube (102) is connected to an external vacuum pump; the anti-bending sleeve (103) is also sealedly connected to the main flow channel and the branch flow channel (1011) through a vacuum source hollow joint (107); the main flow channel and the branch flow channel (1011) are sealedly connected to the work station protrusion (1013) through the Tesla valve flow channel (1012); a vacuum source sealing ring (106) is arranged at the vacuum source hollow joint (107) for sealing.

3. A multifunctional vacuum concentration cover plate as claimed in claim 2, characterized in that: The work station protrusion (1013) is sealed and connected to the work station sealing hollow screw (114); the second sealing gasket (113) and the first sealing gasket (112) are stacked in sequence and fixed to the corresponding position of the work station protrusion (1013) by the work station sealing hollow screw (114); a filter (115) is arranged on the work station sealing hollow screw (114) to capture bubbles and impurities in the bubbles.

4. The multifunctional vacuum concentration cover plate according to claim 1, characterized in that: The outer surface of the cover plate body (101) is sealed and fitted with the glass cover plate (110) via a glass cover plate sealing ring (108); the cover plate body (101) is also fixed to the glass cover plate (110) via a glass cover plate mounting knob (111); a glass cover plate mounting sealing ring (109) is arranged in the stud of the glass cover plate mounting knob (111) for sealing.

5. The multifunctional vacuum concentration cover plate according to claim 1, characterized in that: The cover plate heating component (20) comprises a heating wire (201) and a protective cover (205); the heating wire (201) is arranged on the inner surface of the cover plate body (101) by interference fit or bonding; a wiring block (203) is arranged inside the protective cover (205); the wiring block (203) is electrically connected to the heating wire (201) and a temperature sensor (202); the temperature sensor (202) transmits a temperature signal to a controller for the controller to control the heating temperature of the heating wire (201); the wiring block (203) is also electrically connected to an external power source via a wire (204); and a wire guard ring is arranged on the wire (204).

6. The multifunctional vacuum concentration cover plate according to claim 1, characterized in that: The cover hinge (30) comprises a cover hinge seat (301) and a mounting hinge seat (303); the cover hinge seat (301) is fixed to a pin hole (1014) of the cover body (101) by means of screws; the cover hinge seat (301) is slidably connected to the mounting hinge seat (303) by means of a damping hinge (302); the damping hinge (302) can control the opening and closing angle of the cover body (101); and the mounting hinge seat (303) is fixed to a frame of the vacuum parallel concentrator.

7. The multifunctional vacuum concentration cover plate according to claim 6, characterized in that: The cover hinge seat (301) and the mounting hinge seat (303) are provided with through holes and positioning grooves for installing and limiting the position of the damping hinge (302); an angle limiting groove is provided on the cover hinge seat (301); and a positioning pin is provided on the mounting hinge seat (303); one end of the positioning pin is inserted into the angle limiting groove; and the positioning pin can move in the angle limiting groove.

8. The multifunctional vacuum concentration cover plate according to claim 1, characterized in that: The locking component (40) comprises a lock catch (402), a spring (404) and a locking seat (405); the locking seat (405) is fixedly mounted on the cover body (101); the lock catch (402) is fixed in the locking seat (405) by an axial screw (403); the lock catch (402) is rotatable; the spring (404) is arranged in the locking seat (405); the spring (404) is in contact with and connected to the lock catch (402) so that the lock catch (402) can be reset by elastic force; and the handle (401) is arranged on the cover body (101).

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