A formic acid titration device

Abstract

The utility model discloses a formic acid titration device, including the ration tank, exhaust plugging device and ration device, exhaust plugging device and ration device are connected respectively in ration tank both ends, the ration tank includes the box, connecting pipe, lead out pipe, liquid inlet pipe, screw dropper, sealing ring and connecting screw cover, connecting pipe is connected on the one end of box, lead out pipe is connected on connecting pipe, the upper and lower sides of box are connected with liquid inlet pipe and screw dropper respectively, connecting screw cover is connected on screw dropper, sealing ring is set up on screw dropper and is located in connecting screw cover, the three way valve is connected on liquid inlet pipe, the utility model discloses a formic acid titration device, and its simple structure is convenient and practical, and the amount of drop -wise adding reaction liquid that the box leads in is controlled through adjusting nut, and the drop -wise adding speed is controlled through ration electric jar simultaneously, realizes the purpose of accurate control lead in formic acid amount and drop -wise adding speed.

Description

Technical Field

[0001] This utility model belongs to the field of dropping devices, specifically relating to a formic acid titration device. Background Technology

[0002] Trimethylolethane (TME) is a unique, multifunctional polyol with a neopentane structure containing three highly reactive hydroxyl groups. Applications include the production of powder coating resins, high-solids resins, alkyd resins, polyesters, and reducible resins. In the preparation of TME, formic acid is used for titration and neutralization to a pH of 7-7.5, yielding a reaction solution containing TME and calcium formate. Currently, the addition of formic acid is generally controlled by valves. While valves can be used to adjust the formic acid flow rate for large flow rates or when flow rate requirements are not strict, some materials require small-flow dripping. Direct valve control results in poor precision, making flow rate control difficult and potentially affecting the feed ratio, which can even negatively impact product quality. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a formic acid titration device, which is simple in structure, convenient and practical. The amount of reaction liquid introduced into the chamber is controlled by adjusting the nut, and the dropping speed is controlled by the quantitative electric cylinder, so as to achieve the purpose of accurately controlling the amount of formic acid introduced and the dropping speed.

[0004] A formic acid titration apparatus includes a quantitative tank, an venting and sealing device, and a quantitative device, wherein the venting and sealing device and the quantitative device are respectively connected to both ends of the quantitative tank; the quantitative tank includes a tank body, a connecting pipe, an outlet pipe, an inlet pipe, a threaded dropper, a sealing ring, and a connecting threaded cap; the connecting pipe is connected to one end of the tank body, the outlet pipe is connected to the connecting pipe, the upper and lower sides of the tank body are respectively connected to the inlet pipe and the threaded dropper, the connecting threaded cap is connected to the threaded dropper, the sealing ring is sleeved on the threaded dropper and located inside the connecting threaded cap, and a three-way valve is connected to the inlet pipe.

[0005] Preferably, the exhaust sealing device includes a sealing cylinder, a sealing block, a connecting rod, a sealing piston, and a sealing plate. The sealing block is connected to one end of the connecting pipe. The sealing cylinder is connected to the sealing block, and the piston rod passes through the sealing block and is connected to the connecting rod. The sealing piston is disposed in the housing and is connected to the connecting rod. An exhaust groove is provided on the side of the sealing piston near the metering device. A sealing plate is connected to the side of the sealing piston near the metering device. An exhaust hole is provided on the connecting rod to connect the connecting pipe and the exhaust groove.

[0006] Preferably, the metering device includes a connecting frame, a metering electric cylinder, and a piston. The connecting frame is connected to one end of the housing away from the exhaust sealing device. The metering electric cylinder is mounted on the connecting frame, and the piston rod passes through the side wall of the housing and is connected to the piston.

[0007] Preferably, a screw is connected between the piston rod and the piston of the quantitative electric cylinder, a nut is provided on the screw, and a positioning block that cooperates with the nut is connected to the connecting frame.

[0008] Preferably, the exhaust groove is in the shape of a star.

[0009] Preferably, the threaded dropper is provided with an adjusting nut located inside the connecting threaded cap. Beneficial effects

[0010] (1) The formic acid titration device of this utility model has a simple structure and is convenient and practical. The amount of reaction liquid introduced into the box is controlled by adjusting the nut, and the dropping speed is controlled by the quantitative electric cylinder, so as to achieve the purpose of accurately controlling the amount of formic acid introduced and the dropping speed.

[0011] (2) The formic acid titration device of this utility model controls the threaded dropper switch through the exhaust sealing device to simultaneously exhaust the gas in the box, so as to avoid errors in the amount of reaction liquid introduced into the box and improve the accuracy of the reaction liquid introduction. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the dropping device; Figure 2 This is a schematic diagram of the quantitative device. Figure 3 This is a schematic diagram of the exhaust sealing device; 1-Quantitative tank, 11-Box body, 12-Connecting pipe, 13-Outlet pipe, 14-Inlet pipe, 15-Threaded dropper, 16-Adjusting nut, 17-Sealing ring, 18-Connecting threaded cap, 2-Exhaust sealing device, 21-Sealing cylinder, 22-Sealing block, 23-Connecting rod, 24-Exhaust hole, 25-Sealing piston, 26-Exhaust groove, 27-Sealing plate, 3-Quantitative device, 31-Connecting frame, 32-Quantitative electric cylinder, 33-Screw, 34-Nut, 35-Piston. Detailed Implementation

[0013] The embodiments of this utility model are further described below with reference to the accompanying drawings. Example

[0014] like Figures 1 to 3As shown; a formic acid titration apparatus includes a quantitative tank 1, an venting and sealing device 2, and a quantitative device 3, wherein the venting and sealing device 2 and the quantitative device 3 are respectively connected to both ends of the quantitative tank 1; the quantitative tank 1 includes a tank body 11, a connecting pipe 12, an outlet pipe 13, an inlet pipe 14, a threaded dropper 15, a sealing ring 17, and a connecting threaded cap 18; the connecting pipe 12 is connected to one end of the tank body 11, and the outlet pipe 13 is connected to the connecting pipe 12; the upper and lower sides of the tank body 11 are respectively connected to... The inlet pipe 14 is connected to the threaded dropper 15. The connecting threaded cap 18 is connected to the threaded dropper 15. The sealing ring 17 is fitted onto the threaded dropper 15 and located inside the connecting threaded cap 18. A three-way valve is connected to the inlet pipe 14. The exhaust sealing device 2 includes a sealing cylinder 21, a sealing block 22, a connecting rod 23, a sealing piston 25, and a sealing plate 27. The sealing block 22 is connected to one end of the connecting pipe 12. The sealing cylinder 21 is connected to the sealing block 22 and the piston rod... The through-blocking block 22 is connected to the connecting rod 23. The blocking piston 25 is disposed inside the housing 11 and connected to the connecting rod 23. The blocking piston 25 has an exhaust groove 26 on the side near the metering device 3. A sealing plate 27 is connected to the side of the blocking piston 25 near the metering device 3. An exhaust hole 24 is provided on the connecting rod 23 to connect the connecting pipe 12 and the exhaust groove 26. The metering device 3 includes a connecting frame 31, a metering electric cylinder 32, and a piston 35. The connecting frame 31 is connected to... The metering cylinder 32 is mounted on the connecting frame 31 and its piston rod passes through the side wall of the box 11 and is connected to the piston 35. A screw 33 is connected between the piston rod of the metering cylinder 32 and the piston 35. A nut 34 is provided on the screw 33. A positioning block that cooperates with the nut 34 is connected on the connecting frame 31. The exhaust groove 26 is in the shape of a star. An adjusting nut 16 is provided on the threaded dropper 15 and is located inside the connecting threaded cover 18.

[0015] The sealing cylinder 21 drives the connecting rod 23 and the sealing piston 25 to move, causing the sealing piston 25 to seal the threaded dropper 15. Then, the relative position of the positioning block of the nut 34 is adjusted, and the metering cylinder 32 drives the screw 33 and piston 35 to move. Finally, the reaction liquid is introduced into the box 11 through the three-way valve and the liquid inlet pipe 14. The air in the box 11 enters the exhaust groove 26 through the gap between the sealing plate 27 and the inner wall of the box 11, and then enters the exhaust hole 24, the connecting pipe 12 and the outlet pipe 13 in sequence through the exhaust groove 26 and is discharged until the outlet pipe 1 is discharged. 3. Discharge the reaction liquid and close the gate valve on the discharge pipe 13. At the same time, control the dripping speed with the high-precision displacement of the metering cylinder 32. Connect the threaded cap 18 to the dripping pipe on the reactor. Adjust the locking and sealing position of the threaded cap 18 with the adjusting nut 16 to make it easier to insert the threaded dropper 15 into the dripping pipe on the reactor, so that the state and speed of the dripping can be observed through the reactor's observation window. Drive the piston 35 to approach the sealing piston 25 through the metering cylinder 32 to guide the reaction liquid in the box 11 into the threaded dropper 15 for discharge, so as to realize the dripping operation.

[0016] The specific embodiments of this utility model have been described in detail above, but they are merely examples, and this utility model is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions to this utility model are also within the scope of this utility model. Therefore, all equivalent changes and modifications made without departing from the spirit and scope of this utility model are covered within the scope of this utility model.

Claims

1. A formic acid titration apparatus, characterized in that: The device includes a metering box (1), an exhaust sealing device (2), and a metering device (3). The exhaust sealing device (2) and the metering device (3) are respectively connected to both ends of the metering box (1). The metering box (1) includes a box body (11), a connecting pipe (12), an outlet pipe (13), an inlet pipe (14), a threaded dropper (15), a sealing ring (17), and a connecting threaded cap (18). The connecting pipe (12) is connected to one end of the box body (11), and the outlet pipe (13) is connected to the connecting pipe (12). The upper and lower sides of the box body (11) are respectively connected to the inlet pipe (14) and the threaded dropper (15). The connecting threaded cap (18) is connected to the threaded dropper (15). The sealing ring (17) is sleeved on the threaded dropper (15) and located inside the connecting threaded cap (18). A three-way valve is connected to the inlet pipe (14).

2. The formic acid titration apparatus as described in claim 1, characterized in that: The exhaust sealing device (2) includes a sealing cylinder (21), a sealing block (22), a connecting rod (23), a sealing piston (25), and a sealing plate (27). The sealing block (22) is connected to one end of the connecting pipe (12). The sealing cylinder (21) is connected to the sealing block (22), and the piston rod passes through the sealing block (22) and is connected to the connecting rod (23). The sealing piston (25) is located inside the housing (11) and is connected to the connecting rod (23). An exhaust groove (26) is provided on the side of the sealing piston (25) near the metering device (3). A sealing plate (27) is connected on the side of the sealing piston (25) near the metering device (3). An exhaust hole (24) is provided on the connecting rod (23) to connect the connecting pipe (12) and the exhaust groove (26).

3. The formic acid titration apparatus as described in claim 2, characterized in that: The metering device (3) includes a connecting frame (31), a metering electric cylinder (32) and a piston (35). The connecting frame (31) is connected to one end of the housing (11) away from the exhaust sealing device (2). The metering electric cylinder (32) is mounted on the connecting frame (31) and the piston rod passes through the side wall of the housing (11) and is connected to the piston (35).

4. The formic acid titration apparatus as described in claim 3, characterized in that: A screw (33) is connected between the piston rod and the piston (35) of the quantitative electric cylinder (32). A nut (34) is provided on the screw (33), and a positioning block that cooperates with the nut (34) is connected on the connecting frame (31).

5. The formic acid titration apparatus as described in claim 4, characterized in that: The exhaust groove (26) is in the shape of a star.

6. A formic acid titration apparatus as described in claim 1 or 5, characterized in that: The threaded dropper (15) is provided with an adjusting nut (16) and is located inside the connecting threaded cap (18).

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