A soil fluoride determination uncapping mechanism

Abstract

The utility model discloses a kind of uncap mechanisms for soil fluoride determination, including substrate, vertical lifting installation is uncap lifting frame on substrate, uncap lifting frame is driven by lifting power device, a plurality of uncap sleeves are fixedly installed on uncap lifting frame, uncap sleeve rectangular array is arranged, the lower end on uncap sleeve is provided with the opening of sleeve on crucible cover, the sidewall of uncap sleeve is provided with the pin shaft of symmetrical radial elastic sliding installation, the inside end of pin shaft is provided with clamping block, the lower part of clamping block is provided with inclined inclined surface, inclined surface cooperates with the upper end of crucible cover, and the step along of the upper end surface cooperation with clamping block is provided on crucible cover, retractable drive device that drive pin shaft synchronous extension is provided on uncap lifting frame, the uncap mechanism can be arranged in array to the crucible cover of one-time uncap, simplify operation process, avoid scald.

Description

Technical Field

[0001] This utility model relates to the field of soil fluoride determination technology, and in particular to a cover-opening mechanism for soil fluoride determination. Background Technology

[0002] In the determination of soil fluoride, the sampled soil is sieved through a 0.149 mm sieve and placed in a nickel crucible. Sodium hydroxide is added, and the crucible is heated in a high-temperature electric furnace (muffle furnace) gradually from a low temperature to 550℃-570℃, and then held at that temperature for 20 minutes. The crucible is then removed and cooled, and the sample is repeatedly immersed in boiling water until the molten material is completely dissolved. The solution is then transferred to a volumetric flask, and hydrochloric acid is slowly added while shaking continuously. After cooling, water is added to the mark, the mixture is shaken well, and the solution is allowed to settle before testing.

[0003] Currently, soil digestion is typically performed in a muffle furnace. However, because soil testing requires a large number of samples, multiple crucibles are placed in the muffle furnace for simultaneous heating and digestion. The crucibles are arranged in an array on a support, each with a lid to prevent soil splattering during heating. After heating in the furnace, the support is removed and the crucibles are placed in a room for natural or ambient cooling, usually with the air conditioning on to accelerate the process. However, this method has the following problems:

[0004] 1. The crucible has a relatively long cooling time; 2. If the crucible lid is not opened during the cooling process, the cooling rate of the crucible will be further prolonged. If the crucible lid is removed immediately, the temperature of the crucible lid is very high, making it more difficult to open and increasing the risk of burns due to improper operation; 3. Since a lot of crucible lids are placed on the rack, the operation of opening the lid is also relatively cumbersome. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a lid opening mechanism for soil fluoride determination, which can open the lids of the arrayed crucibles in one go, simplifying the operation process and avoiding burns.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: a lid-opening mechanism for soil fluoride determination, comprising a base plate, a lid-opening lifting frame vertically and vertically mounted on the base plate, the lid-opening lifting frame being driven by a lifting power device, a plurality of lid-opening sleeves fixedly mounted on the lid-opening lifting frame, the lid-opening sleeves being arranged in a rectangular array, the lower end of each lid-opening sleeve having an opening that fits onto a crucible lid, radially elastically sliding pins symmetrically arranged on the side walls of both sides of each lid-opening sleeve, a locking block being provided on the inner end of each pin, an inclined surface being provided at the lower part of each locking block, the inclined surface cooperating with the upper end of the crucible lid, a stepped edge being provided on the crucible lid that cooperates with the upper end surface of the locking block, and a telescopic drive device being provided on the lid-opening lifting frame to drive the pins to extend and retract synchronously.

[0007] As a preferred embodiment, the telescopic drive device includes several drive shafts axially slidably mounted on the lid-opening lifting frame. The sliding direction of the drive shafts is perpendicular to the sliding direction of the pins. One drive shaft is provided on each side of each row of lid-opening sleeves. Several drive blocks are fixedly mounted on the drive shafts. Each drive block is provided with a drive ramp. The drive ramp causes the pins to move closer to or further away from the crucible lid. Each pin is provided with a cooperating force rod that mates with the drive ramp. All drive shafts are driven axially by the telescopic power device to cause the drive blocks to drive the pins to extend and retract radially.

[0008] As a preferred embodiment, the telescopic power device includes a telescopic cylinder fixed to the cover-opening lifting frame. A drive plate is fixed to the piston rod of the telescopic cylinder. The drive plate is slidably mounted on the cover-opening lifting frame via a guide rod. The lower end of the drive plate extends downward and engages with the ends of all drive shafts. Each drive shaft is axially slidably mounted on the cover-opening lifting frame via at least two guide sleeves. A first compression spring is fitted onto the drive shaft, and a spring seat is fixed to the drive shaft. The first compression spring presses between the guide sleeve and the spring seat, and the elastic force of the first compression spring forces the drive ramp to separate from the cooperating force rod.

[0009] As a preferred embodiment, the lifting frame for opening the lid includes a first side beam and a second side beam that are parallel to each other. Several parallel intermediate beams are connected between the first side beam and the second side beam. Each intermediate beam includes a horizontal plate portion and a vertical plate portion, which form an L-shape. The horizontal plate portion of adjacent intermediate beams is fixed to the top of the lid opening sleeve. The drive shaft and guide sleeve are installed on the vertical plate portion.

[0010] As a preferred embodiment, both the first and second side beams are provided with two vertical guide rods. The vertical guide rods are arranged at the ends of the rectangle and their upper ends penetrate the substrate. The upper ends of the vertical guide rods are fixed with limit sleeves. A connecting plate is provided at the center of the rectangle formed by the four limit sleeves. The connecting plate is fixed to the limit sleeves by a connecting support rod. A lifting cylinder is provided between the connecting plate and the substrate.

[0011] As a preferred embodiment, the side wall of the cover sleeve is provided with symmetrical stepped mounting holes, the pin passes through the stepped mounting holes, a second compression spring is fitted on the pin, the second compression spring is pre-pressed between the locking block and the stepped mounting holes, and a limit nut is fixed on the pin on the outside of the cover sleeve.

[0012] As a preferred embodiment, the outer end of the pin is provided with a connecting screw hole, and the mating force-applying rod is threaded into the connecting screw hole.

[0013] After adopting the above technical solution, the effect of this utility model is as follows: A cap-opening mechanism for soil fluoride determination includes a base plate, on which a cap-opening lifting frame is vertically and vertically mounted. The cap-opening lifting frame is driven by a lifting power device. A plurality of cap-opening sleeves are fixedly mounted on the cap-opening lifting frame in a rectangular array. The lower end of each cap-opening sleeve has an opening that fits onto a crucible lid. Symmetrically radially elastically sliding pins are provided on the side walls of each cap-opening sleeve. A locking block is provided on the inner end of each pin. The lower part is provided with an inclined slope, which fits with the upper end of the crucible lid. The crucible lid is provided with a stepped edge that fits with the upper end face of the locking block. The lid opening lifting frame is provided with a telescopic drive device that drives the pin shaft to extend and retract synchronously. Therefore, in actual operation, the base plate of the lid opening mechanism is installed above the workbench, and the workbench corresponds to the opening of the muffle furnace. After the soil sample in the crucible is heated and digested, the entire bracket is pulled out to the designated area of ​​the workbench. At this time, the bracket is below the lid opening lifting frame, and the crucible lid and the lid opening sleeve correspond one-to-one. Then, the lifting frame descends, and as it descends, the lid-opening sleeve fits onto the crucible lid. During the descent, the inclined surface of the locking block engages with the upper end of the crucible lid, gradually squeezing the locking block radially. When the upper surface of the locking block is at the edge of the step, the crucible lid is secured. At this point, the lifting frame can rise to lift the crucible lid, completing the opening of the lid. This facilitates better heat dissipation from the crucible, replacing manual opening, saving time, and preventing burns. This opening mechanism can also close the lid. When closing, the lifting frame descends, and the crucible lid, originally held by the locking block, falls onto the upper opening of the crucible. At this point, the telescopic drive device drives the pin to slide radially, thus separating the locking block from the crucible lid. Then, the lifting frame rises again to close the crucible lid.

[0014] The telescopic drive device includes several drive shafts axially slidably mounted on the lid-opening lifting frame. The sliding direction of the drive shafts is perpendicular to the sliding direction of the pins. One drive shaft is provided on each side of each row of lid-opening sleeves. Several drive blocks are fixedly mounted on the drive shafts. Each drive block is provided with a drive ramp. The drive ramp causes the pins to move closer to or further away from the crucible lid. Each pin is provided with a cooperating force rod that cooperates with the drive ramp. All drive shafts are driven axially by the telescopic power device to drive the drive blocks to drive the pins to extend and retract radially. The telescopic power device can drive the drive shafts to move axially. The axial movement of the drive shafts can force the drive blocks to press against or separate from the cooperating force rods, thereby forcing the pins to slide radially, thus achieving the clamping or separation of the blocks. This telescopic drive device has a reasonable structure. It can drive the extension and retraction of multiple blocks arranged in a straight line using drive shafts. It has a simple structure and reliable operation.

[0015] Furthermore, since the opening lifting frame includes a first side beam and a second side beam that are parallel to each other, and several parallel intermediate beams are connected between the first side beam and the second side beam, the intermediate beam includes a horizontal plate portion and a vertical plate portion, the horizontal plate portion and the vertical plate portion form an L shape, the horizontal plate portion of adjacent intermediate beams is fixed to the top of the opening sleeve, and the drive shaft and guide sleeve are installed on the vertical plate portion, the opening lifting frame structure is lightweight and can be easily connected to the opening sleeve in a better array arrangement.

[0016] Furthermore, since both the first and second side beams are equipped with two vertical guide rods, the vertical guide rods are arranged at the ends of the rectangle and their upper ends penetrate the substrate. The upper ends of the vertical guide rods are fixed with limit sleeves, and a connecting plate is set at the center of the rectangle formed by the four limit sleeves. The connecting plate is fixed to the limit sleeves by connecting support rods. A lifting cylinder is set between the connecting plate and the substrate. With this structure, the vertical guide rods are used for guidance, and the limit sleeves facilitate the setting and connection of the connecting plate, thus making the lifting of the entire structure more stable. The lifting cylinder is located at the center of the limit sleeves, and the overall driving of the opening lifting cylinder is smoother.

[0017] Furthermore, since the outer end of the pin is provided with a connecting screw hole, and the mating force rod is threaded into the connecting screw hole, the pin can be easily assembled when the mating force rod is not installed, thus making the assembly simpler. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the structure after the substrate is hidden in an embodiment of this utility model;

[0021] Figure 3 yes Figure 2 Enlarged view of the structure at point A in the middle;

[0022] Figure 4 yes Figure 2 Top view;

[0023] Figure 5 yes Figure 4 A cross-sectional view along BB;

[0024] Figure 6 yes Figure 5 Enlarged view of the structure at point C;

[0025] Figure 7 yes Figure 2 The left view;

[0026] Figure 8 yes Figure 7 Enlarged view of the structure at point D;

[0027] In the attached diagram: 1. Base plate; 2. Lid opening lifting frame; 21. First side beam; 22. Second side beam; 23. Middle beam; 231. Horizontal plate; 232. Vertical plate; 3. Lifting cylinder; 4. Lid opening sleeve; 5. Crucible lid; 6. Pin; 7. Clamping block; 8. Drive shaft; 9. Drive block; 10. Coupling force rod; 11. Telescopic cylinder; 12. Drive plate; 13. Guide rod; 14. Guide sleeve; 15. Spring seat; 16. Vertical guide rod; 17. Limiting sleeve; 18. Connecting plate; 19. Connecting support rod; 20. Limiting nut; 24. First compression spring; 25. Second compression spring; 26. Bracket. Detailed Implementation

[0028] The present invention will be further described in detail below through specific embodiments.

[0029] like Figure 1-8 As shown, a lid-opening mechanism for soil fluoride determination includes a base plate 1. A lid-opening lifting frame 2 is vertically and vertically mounted on the base plate 1. The lid-opening lifting frame 2 is driven by a lifting power device. Several lid-opening sleeves 4 are fixedly mounted on the lid-opening lifting frame 2. The lid-opening sleeves 4 are arranged in a rectangular array. The lower end of the lid-opening sleeve 4 is provided with an opening for fitting onto a crucible lid 5. A symmetrically radially elastically sliding pin 6 is provided on the side wall of the lid-opening sleeve 4. A locking block 7 is provided on the inner end of the pin 6. An inclined slope is provided at the lower part of the locking block 7. The inclined slope cooperates with the upper end of the crucible lid 5. The crucible lid 5 is provided with a stepped edge that cooperates with the upper end surface of the locking block 7. The lid-opening lifting frame 2 is provided with a telescopic drive device that drives the pin 6 to extend and retract synchronously.

[0030] In this embodiment, the lifting power device is a lifting cylinder 3, and the telescopic drive device includes several drive shafts 8 axially slidably mounted on the cover-opening lifting frame 2. The sliding direction of the drive shafts 8 is perpendicular to the sliding direction of the pins 6. Each row of cover-opening sleeves 4 has one drive shaft 8 on each side. Several drive blocks 9 are fixedly mounted on the drive shafts 8. The drive blocks 9 are provided with drive inclined surfaces. The drive inclined surfaces are arranged along the length direction of the pins 6. Each pin 6 is provided with a cooperating force rod 10 that cooperates with the drive inclined surface. All the drive shafts 8 are driven by the telescopic power device to move in the direction of the drive shafts 8, thereby driving the pins 6 to perform radial extension and retraction at the same time.

[0031] The telescopic power device includes a telescopic cylinder 11, which is fixed on the lid-opening lifting frame 2. A drive plate 12 is fixed on the piston rod of the telescopic cylinder 11. The drive plate 12 is slidably mounted on the lid-opening lifting frame via a guide rod 13. The lower end of the drive plate 12 extends downward and engages with the ends of all drive shafts 8. Each drive shaft 8 is axially slidably mounted on the lid-opening lifting frame 2 via at least two guide sleeves 14. A first compression spring is fitted on the drive shaft 8, and a spring seat 15 is fixed on the drive shaft 8. The first compression spring is pressed between the guide sleeve 14 and the spring seat 15. The elastic force of the first compression spring forces the drive inclined surface to separate from the cooperating force rod 10.

[0032] In this embodiment, the lifting frame 2 includes a first side beam 21 and a second side beam 22 that are parallel to each other. A plurality of parallel intermediate beams 23 are connected between the first side beam 21 and the second side beam 22. The intermediate beams 23 include a horizontal plate portion 231 and a vertical plate portion 232. The horizontal plate portion 231 and the vertical plate portion 232 form an L-shape. The horizontal plate portion 231 of the adjacent intermediate beams 23 is fixed to the top of the lifting sleeve 4. The drive shaft 8 and the guide sleeve 14 are installed on the vertical plate portion 232. The first side beam 21 and the second side beam 22 are each provided with two vertical guide rods 16. The four vertical guide rods 16 are rectangular. Each vertical guide rod 16 is arranged at the end of the rectangle and its upper end passes through the base plate 1. The upper end of the vertical guide rod 16 is fixed with a limit sleeve 17. A connecting plate 18 is provided at the center of the rectangle formed by the four limit sleeves 17. The connecting plate 18 is fixed to the limit sleeve 17 through a connecting support rod 19. A lifting cylinder 3 is provided between the connecting plate 18 and the base plate 1.

[0033] Symmetrical stepped mounting holes are provided on the side wall of the cover sleeve 4. The pin 6 passes through the stepped mounting holes. A second compression spring is fitted on the pin 6. The second compression spring is pre-pressed between the locking block 7 and the stepped mounting holes. A limit nut 20 is fixed on the pin 6 on the outside of the cover sleeve 4.

[0034] The outer end of the pin 6 is provided with a connecting screw hole, and the cooperating force rod 10 is threaded into the connecting screw hole.

[0035] During use, the lid-opening mechanism is installed above the workbench, which corresponds to the opening of the muffle furnace. After the soil sample inside the crucible is heated and dissolved, the entire support is pulled out to the designated area of ​​the workbench, positioning the support below the lid-opening lifting frame 2. The positions of the crucible lid 5 and the lid-opening sleeve 4 correspond one-to-one. When it is necessary to open the lid, the lifting cylinder 3 drives the lid-opening lifting frame 2 to descend, and the lid-opening sleeve 4 is placed on the crucible lid 5. During the descent, the inclined surface of the locking block 7 engages with the upper end of the crucible lid 5, gradually squeezing the locking block 7 radially. When the upper surface of the locking block 7 is at the edge of the step, the crucible lid 5 is locked in place. At this point, the lifting cylinder 3 drives the lid-opening lifting frame 2 to rise, thus lifting all the crucible lids 5 and opening them all at once. When it is necessary to close the lid, the lifting cylinder 3 drives the lid-opening lifting frame 2 to descend. At this time, the crucible lid 5, which was originally held by the clamping block 7, will descend with it and be placed on the upper opening of the crucible. Then, the telescopic cylinder 11 drives the drive shaft 8 to move axially, and the drive inclined surface of the drive block 9 will drive the pin 6 to extend and retract radially, so that the pin 6 slides radially outward, the clamping block 7 and the crucible lid 5 are separated, and then the lifting cylinder 3 drives the lid-opening lifting frame 2 to rise, thus completing the lid-closing action of the crucible lid 5.

[0036] The pneumatic system, servo motor and other actuators, gear transmission mechanism, and lead screw and nut mechanism mentioned in this embodiment are all current conventional technologies. The 5th edition of the "Mechanical Design Handbook" published in Beijing in April 2008 (5th edition, 28th printing) details the specific structure, principle, and other designs of cylinders, motors, and other transmission mechanisms, which are existing technologies with clear and straightforward structures. The 3rd edition of "Modern Practical Pneumatic Technology" SMC training materials published by Machinery Industry Press on August 1, 2008, details vacuum components, gas circuits, and program control, indicating that the pneumatic structure in this embodiment is also existing technology and clear and straightforward. The book "Motor Drive and Speed ​​Regulation" published by Chemical Industry Press on July 1, 2015, also details motor control and limit switches. Therefore, the circuit and pneumatic connections are clear.

[0037] The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Any modifications and alterations to the technical solution of the present utility model without departing from its design spirit shall fall within the protection scope defined by the claims of the present utility model.

Claims

1. A cover-opening mechanism for soil fluoride determination, comprising a base plate, characterized in that: A lid-opening lifting frame is vertically and vertically mounted on the substrate. The lid-opening lifting frame is driven by a lifting power device. Several lid-opening sleeves are fixedly mounted on the lid-opening lifting frame. The lid-opening sleeves are arranged in a rectangular array. The lower end of each lid-opening sleeve has an opening that fits onto the crucible lid. Symmetrically radially elastically sliding pins are provided on the side walls of each lid-opening sleeve. A locking block is provided on the inner end of each pin. The lower part of the locking block has an inclined surface that mates with the upper end of the crucible lid. The crucible lid has a stepped edge that mates with the upper surface of the locking block. The lid-opening lifting frame is equipped with a telescopic drive device that drives the pins to extend and retract synchronously.

2. The opening mechanism for soil fluoride determination as described in claim 1, characterized in that: The telescopic drive device includes several drive shafts axially slidably mounted on the lid-opening lifting frame. The sliding direction of the drive shafts is perpendicular to the sliding direction of the pins. One drive shaft is provided on each side of each row of lid-opening sleeves. Several drive blocks are fixedly mounted on the drive shafts. Each drive block is provided with a drive ramp. The drive ramp causes the pins to move closer to or further away from the crucible lid. Each pin is provided with a cooperating force rod that mates with the drive ramp. All drive shafts are driven axially by the telescopic power device to cause the drive blocks to drive the pins to extend and retract radially.

3. The opening mechanism for soil fluoride determination as described in claim 2, characterized in that: The telescopic power device includes a telescopic cylinder, which is fixed on the lid-opening lifting frame. A drive plate is fixed on the piston rod of the telescopic cylinder. The drive plate is slidably mounted on the lid-opening lifting frame via a guide rod. The lower end of the drive plate extends downward and engages with the ends of all drive shafts. Each drive shaft is axially slidably mounted on the lid-opening lifting frame via at least two guide sleeves. A first compression spring is fitted on the drive shaft, and a spring seat is fixed on the drive shaft. The first compression spring is pressed between the guide sleeve and the spring seat, and the elastic force of the first compression spring forces the drive inclined surface to separate from the cooperating force rod.

4. The opening mechanism for soil fluoride determination as described in claim 3, characterized in that: The lifting frame for opening the lid includes a first side beam and a second side beam that are parallel to each other. Several parallel intermediate beams are connected between the first side beam and the second side beam. Each intermediate beam includes a horizontal plate and a vertical plate, which form an L-shape. The horizontal plate of adjacent intermediate beams is fixed to the top of the lid opening sleeve. The drive shaft and guide sleeve are installed on the vertical plate.

5. The soil fluoride determination cap-opening mechanism as described in claim 4, characterized in that: The first side beam and the second side beam are each provided with two vertical guide rods. The vertical guide rods are arranged at the ends of the rectangle and their upper ends penetrate the substrate. The upper ends of the vertical guide rods are fixed with limit sleeves. A connecting plate is provided at the center of the rectangle formed by the four limit sleeves. The connecting plate is fixed to the limit sleeves by a connecting support rod. A lifting cylinder is provided between the connecting plate and the substrate.

6. The opening mechanism for soil fluoride determination as described in claim 5, characterized in that: The side wall of the cover sleeve is provided with symmetrical stepped mounting holes. The pin passes through the stepped mounting holes and a second compression spring is fitted on the pin. The second compression spring is pre-pressed between the locking block and the stepped mounting holes. A limit nut is fixed on the pin on the outside of the cover sleeve.

7. The opening mechanism for soil fluoride determination as described in claim 6, characterized in that: The outer end of the pin is provided with a connecting screw hole, and the mating force-applying rod is threaded into the connecting screw hole.

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