Trifluoroacetic acid product mixing device and pipe valve unit

Abstract

The utility model relates to a trifluoroacetic acid product mixing device and a pipe valve unit. The mixing device comprises the pipe valve unit which is arranged on a mixing tank bottom cover and comprises a valve pipe assembly, an end cap I, a spring and a barrel piece. A cavity and a groove hole are formed in an end block at the upper end of the valve pipe assembly. A counter bore is formed in the bottom wall of the bottom cover, and an annular flange is formed on the outer wall. And the end block can move in and out of the counter bore. The lower end of the valve pipe assembly extends out of the bottom cover and is sleeved with the first end cap, the spring and the barrel piece. The first end cap is connected with the annular flange, the spring is arranged in the first end cap, and the upper end of the spring makes contact with the first radial flange on the valve pipe assembly. The cylinder piece is arranged below the first end cap. A pair of radial arms which are oppositely arranged in the radial direction are formed on the outer wall of the valve pipe assembly. And the rail surface at the lower end of the cylinder piece comprises a pair of convex parts and a pair of concave parts which can be correspondingly matched with the two radial arms, and the convex parts and the concave parts are alternately arranged around the circumference. The tank body cleaning structure of the mixing tank is improved, the structure of the mixing tank is simplified, and the cleaning operation efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of mixing devices, specifically to a mixing device and valve unit for trifluoroacetic acid products. Background Technology

[0002] Trifluoroacetic acid products have wide applications in multiple fields, including: 1) laboratory reagents and solvents: commonly used in spectrophotometric analysis, protein sequencing, etc.; 2) catalysts: used as catalysts in polymerization reactions and can be mixed with liquid sulfur dioxide to dissolve proteins; 3) organic synthesis: as excellent solvents in organic synthesis, achieving results difficult to obtain with common solvents; 4) pharmaceutical and pesticide intermediates: used in the synthesis of pharmaceuticals and pesticides. When used as an important pesticide intermediate, trifluoroacetic acid products, such as ethyl trifluoroacetoacetate, require efficient mixing of their constituent raw materials during preparation. In most cases, the mixing process is carried out in a corresponding mixing tank. There are various types of existing mixing tanks, generally including a feed pipe at the top of the tank, a discharge pipe at the bottom, and a stirring unit fixed at the top of the tank. The stirring motor in the stirring unit drives the stirring shaft and blades to rotate, completing the mixing operation.

[0003] To achieve the purpose of cleaning the mixing tank cavity and prevent the subsequent mixing solution from mixing with the residual solution from the previous preparation, which could adversely affect the preparation effect of subsequent production, the stirring unit is usually fixed on a top cover that can be raised, lowered, and rotated relative to the tank body, allowing the upper part of the tank cavity to be selectively opened and closed. Because the stirring unit is fixed on the top of the tank, the top cover needs to be frequently opened and closed during tank cavity cleaning to inject cleaning water and agitate the water to rinse the tank walls. The wastewater after cleaning is usually sent to a wastewater treatment tank through a branch pipe on the discharge pipe. Therefore, existing mixing tanks suffer from problems such as a relatively complex top structure, high energy consumption during cleaning operations, and low cleaning efficiency. Utility Model Content

[0004] To overcome the above-mentioned technical problems, this utility model provides a mixing device and valve unit for trifluoroacetic acid products. It improves the tank structure of the mixing tank, effectively avoids wastewater residue in the discharge pipe after cleaning the tank cavity, and prevents adverse effects on the effect of subsequent mixing liquid. At the same time, it simplifies the structure of the mixing tank and improves the efficiency of cleaning operations.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a mixing device for trifluoroacetic acid products, including a mixing tank, a stirring unit, and at least one valve unit. A bottom cover is provided at the bottom of the mixing tank to seal the lower port of the tank cavity. The valve unit is fixedly installed on the bottom wall of the bottom cover and includes a valve pipe assembly, an end cap, a spring, and a cylinder.

[0006] The upper end of the valve tube assembly has an end block with a cavity communicating with the lumen of the valve tube assembly. A slot communicating with the cavity is formed on the side wall of the end block. Generally, the outer diameter of the end block is larger than the outer diameter of the valve tube assembly, forming an end-expanded structure. Correspondingly, a countersunk hole is formed on the bottom wall of the base cover, and an annular flange communicating with the countersunk hole is formed on the outer wall of the base cover; the axes of the two are essentially coaxial. The end block can be selectively moved into and out of the countersunk hole, and the slot on the end block can switch between a blocked and open state, allowing the cavity to selectively establish and disconnect communication with the mixing tank's cavity. The lower end of the valve tube assembly passes through the annular flange and extends downwards to the outside of the base cover. A pipe fitting or valve fitting is connected at the lower port, allowing the valve tube assembly to be connected to the cleaning water source and / or the wastewater tank.

[0007] A through hole is formed on the bottom wall of end cap one. End cap one, spring, and cylinder are all sleeved on the section of valve tube assembly that extends beyond the bottom cover. End cap one and annular flange are fixedly connected as a whole by a threaded structure. Spring is correspondingly disposed in the cap cavity of end cap one, and a radial flange one is formed on the outer wall of valve tube assembly, contacting the upper end of spring. Cylinder is correspondingly disposed below end cap one, and the opposing surfaces of the two can contact each other.

[0008] A pair of radial arms are formed on the outer wall of the valve tube assembly, corresponding to the lower end of the cylinder, and are arranged opposite each other in the radial direction. Correspondingly, the lower end face of the cylinder is formed as a rail surface, and the rail surface includes a pair of protrusions and a pair of recesses that are opposite each other in the radial direction, and the protrusions and recesses are arranged in an alternating manner around the circumference.

[0009] A handle is formed on the side wall of the cylinder. By applying torque to the cylinder with the help of the handle, the cylinder can rotate relative to the valve tube assembly around the vertical axis. This allows the two recesses and two protrusions to alternately contact the upper end faces of the two radial arms. Under the combined action of the associated structure formed with the end cap and the spring, the valve tube assembly can be selectively moved relative to the bottom cover in the vertical direction. Ultimately, this achieves the purpose of driving the end block to selectively move into and out of the countersunk hole.

[0010] The end block corresponds and matches the countersunk hole. When retracted into the countersunk hole, it fills the hole completely. When protruding outward relative to the countersunk hole, the upper part of the slot is exposed outside the countersunk hole, while the lower part remains inside. This ensures that the wastewater from the cleaning tank cavity is fully discharged outside the mixing tank cavity, leaving virtually no residue. It should be noted that the countersunk hole needs to be located at the lowest recessed position of the bottom cover.

[0011] Optionally, a conical boss in the shape of an annular surface is formed on the inner bottom surface of the bottom cover and at the outer edge of the upper port of the countersunk hole.

[0012] A disc-shaped top cover is fixedly mounted on the top wall of the end block, and the outer diameter of the top cover is larger than the outer diameter of the end block. An annular groove is formed on the lower end face of the top cover. An annular axial flange is formed inside the annular groove, and the end face of the axial flange is formed as a flat portion. An annular conical portion is formed outside the annular groove. An elastic sealing ring is fixedly covered on at least the flat portion and the conical portion. When the valve pipe assembly moves downward relative to the bottom cover, the flat portion can contact the end face of the conical boss near the upper end of the countersunk hole; the conical portion can contact the conical side surface of the conical boss.

[0013] Optionally, a ball bearing is fixedly embedded in the upper end face of the radial arm.

[0014] Optionally, an annular flange is formed on the lower end face of the end cap, and the lower end face of the annular flange is formed as a downwardly protruding arc surface. The upper end face of the cylinder is formed as a smooth plane. The arc surface and the smooth plane are in tangential contact.

[0015] Optionally, it also includes a second end cap, with a through hole formed on the bottom wall of the second end cap for the cylindrical member to pass through. The second end cap is connected to the lower part of the first end cap by a threaded structure. A second radial flange is formed at the upper end of the cylindrical member, and the outer diameter of the second radial flange is the same as the inner diameter of the second end cap, and it is inserted into the second end cap.

[0016] This utility model also relates to a valve unit, which includes a valve tube assembly, an end cap, a spring, and a cylinder. An end block is formed at the upper end of the valve tube assembly, and a cavity communicating with the tube lumen of the valve tube assembly is formed on the end block. A slot communicating with the cavity is formed on the side wall of the end block.

[0017] A radial flange is formed in the upper part of the outer wall of the valve tube assembly. A through hole is formed in the bottom wall of the end cap. The end cap, spring, and cylinder are fitted onto the section of the valve tube assembly located below the radial flange. The spring is correspondingly disposed in the cap cavity of the end cap, and the upper end of the spring contacts the lower end face of the radial flange. The cylinder is correspondingly disposed below the end cap, and the opposing surfaces of the two are in contact.

[0018] A pair of radially opposing arms are formed in the lower part of the outer wall of the valve tube assembly. The lower end face of the cylinder is vertically opposite to the upper end face of the radial arms, and the lower end face of the cylinder is formed as a guide surface. The guide surface includes a pair of protrusions and a pair of recesses that can be matched with the two radial arms, and the protrusions and recesses are arranged alternately around the circumference. The cylinder can rotate relative to the valve tube assembly about a vertical axis, so that the two recesses and two protrusions alternately contact the upper end faces of the two radial arms.

[0019] Optionally, a disc-shaped top cover is fixedly provided on the top wall of the end block, and the outer diameter of the top cover is larger than the outer diameter of the end block. An annular groove is formed on the lower end face of the top cover, an annular axial flange is formed on the inner side of the annular groove, and the end face of the axial flange is formed as a flat portion. An annular conical portion is formed on the outer side of the annular groove. At least the flat portion and the conical portion are fixedly covered with elastic sealing rings.

[0020] Optionally, an annular flange is formed on the lower end face of the end cap, and the lower end face of the annular flange is formed as a downwardly protruding arc surface. The upper end face of the cylinder is formed as a smooth plane. The arc surface and the smooth plane are in tangential contact.

[0021] Optionally, it also includes a second end cap, with a through hole formed on the bottom wall of the second end cap for the cylindrical member to pass through. The second end cap is connected to the lower part of the first end cap by a threaded structure. A second radial flange is formed at the upper end of the cylindrical member, and the outer diameter of the second radial flange is the same as the inner diameter of the second end cap, and it is inserted into the second end cap.

[0022] The beneficial effects of this utility model are: the trifluoroacetic acid product mixing device provided by this utility model improves the tank structure of the mixing tank, and does not require opening the top of the mixing tank to inject clean water when cleaning the tank cavity, which helps to simplify the structure of the mixing tank and improve the efficiency of cleaning operations. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the external structure of this utility model.

[0024] Figure 2 A cross-sectional view of the valve unit when it is fixedly mounted on the base cover (in the conducting state).

[0025] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure at point AA.

[0026] Figure 4 A cross-sectional view of the valve unit when it is fixedly mounted on the base cover (in the closed state).

[0027] Figure 5 This is a structural schematic diagram of the cylindrical component.

[0028] Figure 6 This is a schematic diagram of the split cross-sectional structure of the valve unit.

[0029] In the diagram: 100 Mixing tank, 101 Feed pipe, 102 Bottom cover, 1021 Countersunk hole, 1022 Annular flange, 1023 Conical boss, 103 Discharge pipe; 200 Mixing unit; 300 Pipe and valve unit; 10 Valve and pipe assembly, 11 Pipe fitting one, 111 End block, 112 Externally threaded pipe section, 113 Cavity, 114 Slot, 115 Top cover, 116 Elastic pad, 1161 Conical section, 1 162 Flat section, 12 Pipe fitting two, 121 Radial flange one, 122 Annular pad, 13 Pipe fitting three, 131 Radial arm, 132 Ball bearing; 20 End cap one, 21 Radial flange arm, 22 Annular flange, 221 Arc surface; 30 Spring; 40 Cylindrical part, 41 Radial flange two, 42 Smooth flat surface, 43 Rail surface, 431 Protrusion, 432 Recess, 44 Handle; 50 End cap two, 51 Radial flange three. Detailed Implementation

[0030] The structures, proportions, and sizes shown in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, terms such as "upper," "lower," "front," "rear," and "middle" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0031] like Figures 1 to 6 The apparatus shown is a trifluoroacetic acid product mixing device, including a mixing tank 100, a stirring unit 200 disposed on the upper part of the mixing tank 100, and two valve units 300.

[0032] At least one feed pipe 101 is provided on the upper part of the mixing tank 100 for feeding raw material liquid into the tank cavity of the mixing tank 100. A bottom cover 102 is provided at the bottom of the mixing tank 100 to seal the lower port of the tank cavity. A discharge pipe 103 is provided on the bottom wall of the bottom cover 102 for discharging the uniformly mixed medicine solution to the outside of the mixing tank 100. The valve unit 300 is fixed to the bottom wall of the bottom cover 102.

[0033] The valve unit 300 includes a valve pipe assembly 10, an end cap 20, a spring 30, a cylinder 40, and an end cap 50. An end cap 20 has a through hole with its axis running vertically on its bottom wall. A radial flange 21 is formed on the inner wall of this through hole, such that the lower end of the spring 30 contacts the upper end face of the radial flange 21. The radial flange 21 may be annular or composed of multiple flanges arranged alternately around a circumference.

[0034] The upper end of the valve tube assembly 10 has an end block 111, and a cavity 113 communicating with the lumen of the valve tube assembly 10 is formed within the end block 111. At least one slot 114 communicating with the cavity 113 is formed on the side wall of the end block 111. The slot 114 may be an arc-shaped through-hole structure extending in the circumferential direction, see [reference needed]. Figure 2 , Figure 3 As shown.

[0035] A countersunk hole 1021 is formed on the bottom wall of the base cover 102, and an annular flange 1022 communicating with the countersunk hole 1021 is formed on the outer wall surface of the base cover 102. The end block 111 can be selectively moved into and out of the countersunk hole 1021, allowing the slot 114 provided on the end block 111 to switch between a blocked and an open state. The lower end of the valve pipe assembly 10 passes through the annular flange 1022 and extends downward to the outside of the base cover 102.

[0036] The end cap 20, the spring 30, and the cylinder 40 are all sleeved on the section of the valve tube assembly 10 extending outside the bottom cover 102. The end cap 20 and the annular flange 1022 are fixedly connected together by a threaded structure. The spring 30 is correspondingly disposed in the cap cavity of the end cap 20, and a radial flange 121 is formed on the outer wall of the valve tube assembly 10, which contacts the upper end of the spring 30. The radial flange 121 is also located in the cap cavity of the end cap 20. The cylinder 40 is correspondingly disposed below the end cap 20, and the opposing surfaces of the two can contact each other, that is, the smooth plane 42 and the arc surface 221 in the figure are in contact and matched. Twisting the end cap 20 adjusts the insertion length between the end cap 20 and the annular flange 1022, thereby adjusting the initial compression of the spring 30. This adjusts the initial thrust of the spring 30 on the radial flange 121, ensuring the spring 30 is sufficient to push the valve tube assembly 10 upwards relative to the base cover 102. This allows the slot 114 on the end block 111 to fully / completely move outside the countersunk hole 1021 and connect with the cavity of the mixing tank 100. An annular pad 122, made of elastic material, is fixed to the upper end face of the radial flange 121 to reduce the impact intensity when the radial flange 121 contacts the lower end face of the annular flange 1022.

[0037] A pair of radially opposing arms 131 are formed on the outer wall of the valve pipe assembly 10, corresponding to the lower end of the cylinder 40. Correspondingly, a guide surface 43 is formed on the lower end face of the cylinder 40, and the guide surface 43 includes a pair of radially opposing protrusions 431 and a pair of recesses 432, with the two protrusions 431 and the two recesses 432 arranged alternately around the circumference. See [reference needed]. Figure 5 .

[0038] At least one pair of handles 44 are radially oppositely arranged on the side wall of the cylindrical member 40. By applying torque to the cylindrical member 40 with the help of the handles 44, the cylindrical member 40 can rotate about the vertical axis relative to the valve tube assembly 10, so that the two recesses 432 and the two protrusions 431 alternately (simultaneously) contact the upper end faces of the two radial arms 131, and under the combined action of the associated structure formed with the end cap 20 and the spring 30, the valve tube assembly 10 can be selectively moved in the vertical direction relative to the bottom cover 102, so as to achieve the purpose of selectively moving the end block 111 into the countersunk hole 1021 and out of the countersunk hole 1021.

[0039] A ball bearing 132 is fixedly embedded on the upper end face of the radial arm 131, so that the rail surface 43 contacts the ball bearing 132. When the cylinder 40 rotates relative to the valve tube assembly 10 about the vertical axis, the rail surface 43 can maintain a state of tangential contact with the spherical surface of the ball bearing 132 protruding from the upper end face of the radial arm 131, and the ball bearing 132 can generate rotational movement (relative to the radial arm 131) to reduce the effect of dynamic friction between the contact surfaces of the cylinder 40 and the radial arm 131 when they rotate relative to the radial arm 131. If the ball bearing 132 is not provided on the upper end face of the radial arm 131, the upper end face of the radial arm 131 can be formed as an upwardly protruding cylindrical / arc surface, or a rotating roller can be sleeved on the radial arm 131 and made to contact and match the rail surface 43.

[0040] A transitional arc-shaped track is formed between adjacent recesses 432 and protrusions 431 to ensure that the radial arms 131 can slide smoothly on the track surface 43. The two recesses 432 and the two protrusions 431 can alternately (simultaneously) contact the upper end faces of the two radial arms 131, meaning that the upper end faces of the two radial arms 131 can simultaneously slide relative to each other until they are in one-to-one contact with the bottom points of the two recesses 432. See [link / reference needed]. Figure 2 ; and the upper end faces of the two radial arms 131 can simultaneously slide relative to each other to a state where they are in contact with the apexes of the two protrusions 431 in a one-to-one correspondence, see [reference]. Figure 4 .

[0041] When the apexes of the two protrusions 431 simultaneously contact the upper end faces of the two radial arms 131, as... Figure 4 As shown, the cylindrical member 40 can apply a downward thrust on the radial arm 131, causing the valve pipe assembly 10 to move downward relative to the bottom cover 102, so that the end block 111 is fully retracted into the countersunk hole 1021, and the slot 114 is switched to a blocked state. At that time, the communication between the valve pipe assembly 10 and the mixing tank 100 is blocked, and the spring 30 is further compressed and accumulates a large elastic thrust.

[0042] When the bottom points of the two recesses 432 simultaneously contact the upper end faces of the two radial arms 131, as Figure 2 As shown, under the thrust of the spring 30, the valve pipe assembly 10 can be driven to move upward relative to the bottom cover 102, so that the end block 111 extends fully out of the countersunk hole 1021, and the slot 114 switches to a state connected to the tank cavity of the mixing tank 100, so that the wastewater after cleaning the tank cavity can be discharged to the outside of the mixing tank 100 through the valve pipe assembly 10.

[0043] In the above scheme, the end block 111 corresponds to and matches the countersunk hole 1021. When it is fully retracted into the countersunk hole 1021, it can fill the upper port of the countersunk hole 1021, achieving a good seal / blocking. When it protrudes outward relative to the countersunk hole 1021, the upper part of the slot 114 is exposed outside the countersunk hole 1021, and a small portion of the lower part of the slot 114 remains in the countersunk hole 1021. Figure 2 The fact that the central slot hole 114 is completely exposed above the countersunk hole 1021 is only for illustrative purposes and is not intended to contradict the preceding description. This allows the wastewater from the cleaning tank cavity to be fully discharged outside the mixing tank 100, leaving virtually no residue. It should be noted that in Figure 1 For ease of showing the valve unit 300, the position of the valve unit 300 is slightly raised in the view. In reality, the countersunk hole 1021 needs to be located at the lowest recessed position of the bottom cover 102.

[0044] like Figures 2 to 6 As shown, an annular conical boss 1023 is formed on the inner bottom surface of the bottom cover 102 at the outer edge of the upper port of the countersunk hole 1021. Correspondingly, a disc-shaped top cover 115 is fixed on the top wall of the end block 111, and the outer diameter of the top cover 115 is larger than the outer diameter of the end block 111. At the same time, an annular groove is formed on the lower end surface of the top cover 115. An annular axial flange is formed on the inner side of the annular groove, and the end face (free end) of the axial flange is formed as a flat portion 1162. An annular conical portion 1161 is formed on the outer side of the annular groove.

[0045] To improve the sealing effect at the upper port of the countersunk hole 1021, an elastic sealing ring is fixedly applied to at least the flat portion 1162 and the conical portion 1161. Figure 2 , Figure 4 , Figure 6 In the illustrated scheme, an elastic pad 116 is fixedly provided on the inner bottom surface of the entire annular groove. The elastic pad 116 covers the flat portion 1162 and the conical portion 1161, as if an elastic sealing ring were provided. Thus, when the valve pipe assembly 10 moves downward relative to the bottom cover 102, the flat portion 1162 can contact the end face of the conical boss 1023 near the upper port of the countersunk hole 1021, forming an inner seal; simultaneously, the conical portion 1161 can contact the (conical) side surface of the conical boss 1023, forming an outer seal.

[0046] An annular flange 22 is formed on the lower end face of the end cap 20, and the lower end face of the annular flange 22 is formed as a downwardly protruding arc surface 221. The upper end face of the cylindrical member 40 is formed as a smooth plane 42, and the arc surface 221 is matched with the smooth plane 42 in a tangential contact manner, which can reduce the frictional resistance experienced by the upper end of the cylindrical member 40 when it rotates.

[0047] A through hole is formed on the bottom wall of the end cap 50 for the cylindrical member 40 to pass through. A radial flange 41 is formed at the upper end of the cylindrical member 40, and the outer diameter of the radial flange 41 is the same as the inner diameter of the end cap 50.

[0048] The second end cap 50 is connected to the lower part of the first end cap 20 by a threaded structure, and the second radial flange 41 is inserted into the second end cap 50. The second end cap 50, through the second radial flange 41, can support the cylinder 40 upwards to adjust the initial highest position of the cylinder 40. The two radial arms 131 on the valve tube assembly 10 can be provided on the ring and matched with the valve tube assembly 10 by a threaded structure. Tightening the ring can adjust the height position of the ring, or the radial arms 131, on the valve tube assembly 10, so that the rail surface 43 can be effectively matched with the upper end face of the radial arms 131. A third radial flange 51 is formed on the inner wall of the through hole of the second end cap 50, so that the upper end face of the third radial flange 51 contacts the lower end face of the second radial flange 41, so that the second end cap 50 can support the cylinder 40 upwards.

[0049] To facilitate the assembly of the valve pipe unit 300, the valve pipe assembly 10 is composed of three sections: pipe fitting 11, pipe fitting 12, and pipe fitting 13. An end block 111 is formed at the upper end of pipe fitting 11, and the lower part of pipe fitting 11 has an externally threaded pipe section 112 that connects to the upper end of pipe fitting 12 via a threaded structure. A radial flange 121 is formed near the middle of the outer wall of pipe fitting 12. A spring 30 is sleeved on pipe fitting 12, and an end cap 20 can fit the lower part of pipe fitting 12 into its cap cavity. The upper part of the cylindrical member 40 can correspondingly fit onto the lower part of pipe fitting 12. The lower end of pipe fitting 12 is connected to the upper end of pipe fitting 13 via a threaded structure, and a radial arm 131 is correspondingly provided on the side wall of pipe fitting 13. The outer diameters of the main body of pipe fitting 11, pipe fitting 12, and pipe fitting 13 can be made to be the same. The lower end of pipe fitting 13 is connected to a water source and / or wastewater tank via a pipe fitting.

[0050] Multiple layers of sealing rings are arranged alternately in the vertical direction on the inner wall of the countersunk hole 1021. When the end block 11 is retracted into the countersunk hole 1021, the side wall of the end block 11 can contact the sealing rings provided on the countersunk hole 1021 to form a seal.

[0051] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit it. Many aspects of this utility model can be improved without departing from the overall concept. Those skilled in the art can modify or change the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A mixing device for trifluoroacetic acid products, comprising a mixing tank (100) and a stirring unit (200); characterized in that: The mixing tank (100) is provided with a bottom cover (102) at the bottom; it also includes a pipe valve unit (300) fixed on the bottom cover (102); the pipe valve unit (300) includes a valve pipe assembly (10), an end cap (20), a spring (30) and a cylinder (40); The upper end of the valve tube assembly (10) has an end block (111) and a cavity (113) communicating with the lumen of the valve tube assembly (10) is formed on the end block (111); a slot (114) communicating with the cavity (113) is formed on the side wall of the end block (111); a countersunk hole (1021) is formed on the bottom wall of the bottom cover (102) and an annular flange (1022) communicating with the countersunk hole (1021) is formed on its outer wall surface; the end block (111) can selectively move into the countersunk hole (1021) and move out of the countersunk hole (1021); the lower end of the valve tube assembly (10) passes through the annular flange (1022) and extends outside the bottom cover (102); End cap 1 (20), spring (30) and cylinder (40) are fitted onto the section of valve tube assembly (10) that extends beyond the bottom cover (102); end cap 1 (20) is fixedly connected to an annular flange (1022), spring (30) is correspondingly disposed in the cap cavity of end cap 1 (20) and a radial flange 1 (121) is formed on the outer wall of valve tube assembly (10) that contacts the upper end of spring (30); cylinder (40) is correspondingly disposed below end cap 1 (20) and their opposite surfaces can contact each other; on the outer wall of valve tube assembly (10) and corresponding to cylinder The lower end of (40) is formed with a pair of radial arms (131) arranged opposite each other in the radial direction; the lower end face of the cylinder (40) is a rail surface (43) and includes a pair of protrusions (431) and a pair of recesses (432) that can be matched with the two radial arms (131), so that the protrusions (431) and recesses (432) are arranged alternately around the circumference; the cylinder (40) can rotate relative to the valve tube assembly (10) about the vertical axis, so that the two recesses (432) and the two protrusions (431) alternately contact the upper end face of the two radial arms (131).

2. The trifluoroacetic acid product mixing device according to claim 1, characterized in that: An annular conical boss (1023) is formed on the inner bottom surface of the bottom cover (102) and on the outer edge of the upper port of the countersunk hole (1021); a disc-shaped top cover (115) is fixed on the top wall of the end block (111) and the outer diameter of the top cover (115) is larger than the outer diameter of the end block (111); an annular groove is formed on the lower end surface of the top cover (115), an annular axial flange is formed on the inner side of the annular groove and the end face of the axial flange is formed as a flat part (1162), and an annular conical part (1161) is formed on the outer side of the annular groove; an elastic sealing ring is provided on at least the flat part (1162) and the conical part (1161); the flat part (1162) can contact the end face of the conical boss (1023); the conical part (1161) can contact the side of the conical boss (1023).

3. The trifluoroacetic acid product mixing device according to claim 1, characterized in that: A ball bearing (132) is fixedly embedded on the upper end face of the radial arm (131).

4. The trifluoroacetic acid product mixing device according to claim 1, characterized in that: An annular flange (22) is formed on the lower end face of the end cap (20), and the lower end face of the annular flange (22) is formed as a downwardly protruding arc surface (221); the upper end face of the cylinder (40) is formed as a smooth plane (42); the arc surface (221) and the smooth plane (42) are in tangential contact.

5. The trifluoroacetic acid product mixing device according to claim 1, characterized in that: It also includes a second end cap (50) and a through hole is formed on the bottom wall of the second end cap (50) for the cylindrical part (40) to pass through; the second end cap (50) and the lower part of the first end cap (20) are connected together by a threaded structure; a second radial flange (41) is formed at the upper end of the cylindrical part (40) and the outer diameter of the second radial flange (41) is the same as the inner diameter of the second end cap (50) and is placed inside the second end cap (50).

6. A pipe valve unit (300), characterized in that: It includes a valve tube assembly (10), an end cap (20), a spring (30), and a cylinder (40); an end block (111) is formed at the upper end of the valve tube assembly (10), and a cavity (113) communicating with the valve tube assembly (10) is formed on the end block (111); a slot (114) communicating with the cavity (113) is formed on the side wall of the end block (111); A radial flange (121) is formed in the upper part of the outer wall of the valve tube assembly (10); an end cap (20), a spring (30) and a cylinder (40) are sleeved on a section of the valve tube assembly (10) that is located below the radial flange (121); the spring (30) is correspondingly disposed in the cap cavity of the end cap (20) and the upper end of the spring (30) is in contact with the radial flange (121); the cylinder (40) is correspondingly disposed below the end cap (20) and the opposite surfaces can contact each other; A pair of radial arms (131) arranged opposite each other in the radial direction are formed in the lower part of the outer wall of the valve tube assembly (10); the lower end face of the cylinder (40) is opposite to the upper end face of the radial arms (131) and the lower end face of the cylinder (40) is formed as a rail surface (43); the rail surface (43) includes a pair of protrusions (431) and a pair of recesses (432) that can be matched with the two radial arms (131), and the protrusions (431) and recesses (432) are arranged alternately around the circumference; the cylinder (40) can rotate relative to the valve tube assembly (10) about the vertical axis, so that the two recesses (432) and the two protrusions (431) alternately contact the upper end face of the two radial arms (131).

7. The valve unit (300) according to claim 6, characterized in that: A disc-shaped top cover (115) is fixedly provided on the top wall of the end block (111), and the outer diameter of the top cover (115) is larger than the outer diameter of the end block (111); an annular groove is formed on the lower end face of the top cover (115), an annular axial flange is formed on the inner side of the annular groove, and the end face of the axial flange is formed as a flat part (1162), and an annular conical part (1161) is formed on the outer side of the annular groove; at least the flat part (1162) and the conical part (1161) are fixedly covered with elastic sealing rings.

8. The valve unit (300) according to claim 6, characterized in that: A ball bearing (132) is fixedly embedded on the upper end face of the radial arm (131).

9. The valve unit (300) according to claim 6, characterized in that: An annular flange (22) is formed on the lower end face of the end cap (20), and the lower end face of the annular flange (22) is formed as a downwardly protruding arc surface (221); the upper end face of the cylinder (40) is formed as a smooth plane (42); the arc surface (221) and the smooth plane (42) are in tangential contact.

10. The valve unit (300) according to claim 6, characterized in that: It also includes a second end cap (50) and a through hole is formed on the bottom wall of the second end cap (50) for the cylindrical part (40) to pass through; the second end cap (50) and the lower part of the first end cap (20) are connected together by a threaded structure; a second radial flange (41) is formed at the upper end of the cylindrical part (40) and the outer diameter of the second radial flange (41) is the same as the inner diameter of the second end cap (50) and is placed inside the second end cap (50).

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