Pressing type manual solution stirrer

Abstract

The invention relates to the technical field of chemical engineering experiments, in particular to a pressing type manual solution stirrer which comprises a cylinder body, a screw, a lining and a rotating cylinder, the rotating cylinder is arranged in the cylinder body, the lining is fixedly connected with one end of the rotating cylinder, the other end of the rotating cylinder is connected with a rotating rod, and the rotating rod is connected with the screw. One end, far away from the bushing, of the screw rod is connected with a driving rod; the bushing is matched with the screw rod in a screw pair form, the screw rod does linear motion, and the bushing and the rotary drum do rotary motion relative to the screw rod; an end cover is arranged at one end, far away from the rotating rod, of the barrel body; and a reset device is arranged on the screw rod. The pressing type manual solution stirrer is simple in overall design, high in adaptability, convenient to operate and easy to disassemble, assemble, clean and maintain. The stirrer combines simplicity and convenience of manual operation and uniformity and high efficiency of mechanical stirring, provides a new solution for chemical experiments, and has remarkable application value and wide practicability.

Description

Technical Field

[0001] The invention relates to the technical field of chemical experiments, in particular to a press-type manual solution stirrer. Background Art

[0002] At present, there are four main types of experimental stirrers: glass stirring rods, magnetic stirrers, overhead stirrers, and shaker stirrers. Although glass stirring rods are corrosion-resistant and easy to clean, they are fragile and breakable, and are not suitable for stirring large amounts of liquids; magnetic stirrers are small in size, have stepless speed regulation, and are simple to operate, but they stir large amounts of liquids unevenly, the stirrer is easily worn, and may have a magnetizing effect on certain chemical reactions, and stirring too fast can cause samples to splash; overhead stirrers have strong stirring forces and adjustable speeds, but they are large in size and take up space; shaker stirrers are suitable for stirring a large number of samples at the same time, but they cannot accurately control the stirring speed of each sample. In addition, the latter three types of stirrers are inseparable from power supplies and electronic control equipment, which increases experimental costs. Summary of the invention

[0003] In view of the deficiencies in the above-mentioned prior art, the present invention solves the problems of the prior art such as the fragility of glass stirring rods, uneven stirring of magnetic stirrers, easy wear of stirring rods, possible magnetization effect on certain chemical reactions, excessive stirring speed causing sample splashing, large stirring volume of overhead stirrers, and the inability of shaker-type stirrers to accurately control the stirring speed of each sample; and the latter three types of stirrers cannot be separated from power supplies and electronic control equipment, which increases the experimental cost. The present invention provides a push-type manual solution stirrer.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a press-type manual solution agitator, which includes a barrel, a screw, a bushing and a rotating drum, the bushing is fixedly connected to one end of the rotating drum, the bushing and the rotating drum are rotatably positioned inside the barrel, and the other end of the rotating drum is connected to a rotating rod; the bushing and the screw are matched in the form of a spiral pair, and the end of the screw away from the bushing is connected to a driving rod; a reset device is provided on the screw.

[0005] Furthermore, an end cover is provided at one end of the barrel away from the bushing; the reset device is a reset spring; when the drive rod moves to the cover surface of the end cover, the reset spring reaches a maximum compression amount.

[0006] Furthermore, a thrust bearing is arranged between the bottom of one end of the barrel away from the end cover and the sleeve; the bearing is a small micro thrust ball plane bearing, model F8-16M, 8*16*5.

[0007] Furthermore, the screw pitch is 8 mm, the screw cross section is rectangular, the screw cross section has a length of 6 mm and a width of 1 mm.

[0008] Furthermore, the screw is composed of a screw driving head and a screw rod body, the screw driving head is made of plastic, and the screw rod body is made of stainless steel, and the two are connected by threads or bonding.

[0009] Furthermore, the outer diameter of the screw drive head is Ф15mm and the thickness is 10mm; the screw drive head has a built-in annular groove, the inner diameter of the annular groove is Ф8mm, and the outer diameter is Ф18mm; the screw rod body has a pitch of 8mm, and the cross-section of the screw rod body is rectangular, with a cross-sectional length of 6mm and a width of 1mm; the working stroke of the screw is 30mm.

[0010] Furthermore, a screw hole is provided in the center of the bushing; the outer diameter of the bushing is Ф15mm; the screw hole is double-sector-shaped, with a hole diameter of Ф8mm, a sector angle of 30º, a parallel sector edge spacing of 1mm, and a transition arc radius of 2mm.

[0011] Furthermore, the outer diameter of the barrel is Ф18mm; a shaft ring is provided at the bottom of the barrel, and the diameter of the shaft ring is Ф30mm; the shaft ring and the bottom of the barrel form a step surface, and the right end surface of the barrel is 3mm away from the step surface to form a matching surface.

[0012] Furthermore, a test bench is provided under the agitator, a bracket is provided on one side of the test bench, and a positioning support rod with adjustable height is connected to the bracket; the positioning support rod is provided with a circular sleeve, and the agitator is installed on the circular sleeve in a plug-in manner, and the step surface and the mating surface are in surface contact with the upper surface and the inner circular surface of the circular sleeve respectively to achieve stable positioning.

[0013] The technical problem to be solved by the present invention is to provide a solution for a push-type manual solution stirrer. Through the design of a spiral transmission mechanism and a spring return mechanism, the linear motion of the driving rod under the push is converted into the continuous rotation of the rotating rod through force transmission and conversion. The mechanism can achieve a continuously adjustable liquid stirring effect under manual drive. Its advantages of simple operation, reliable performance, strong adaptability and no side effects can provide a convenient and reliable solution stirrer alternative for current chemical experiments.

[0014] The solution agitator can achieve liquid-liquid or solid-liquid mixing efficiently and stably in the laboratory or on specific occasions. It avoids the safety risks of traditional electric agitators when used in explosive, flammable and other dangerous environments. In addition, the agitator does not require an external power supply, is easy to carry and operate, and is particularly suitable for field operations in the field or in an environment without power supply.

[0015] The beneficial effects of the present invention are as follows: the technical problem solved by the present invention is to provide a solution for a press-type manual solution agitator, and its spiral pair-reset spring structure design enables the rotating rod to be driven to stir continuously by intermittently pressing the driving rod with fingers, which is extremely convenient in a power-free or mobile experimental environment, and the speed can also be adjusted by the pressing frequency. Its designed rotation speed can meet the speed requirements of most experiments, the positioning structure and the laboratory bench bracket design can ensure the reliable positioning of the agitator, and the pressing stroke design also conforms to the structural and functional characteristics of the fingers. The design of the built-in small micro-thrust ball plane bearing enables the built-in rotating drum and the drum body to achieve dynamic and static separation, and also converts the sliding friction between the two into rolling friction between the bearing rolling body and the shaft ring and seat ring, thereby reducing friction loss. The overall design of the agitator is simple, adaptable, easy to operate, and easy to disassemble, clean and maintain.

[0016] This stirrer combines the simplicity of manual operation with the uniformity and efficiency of mechanical stirring, providing a new solution for chemical experiments with significant application value and wide practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 This is an overall schematic diagram of a manually pressure-driven solution agitator of the present invention;

[0019] Figure 2 This is a schematic diagram of a manually pressed solution agitator assembly of the present invention;

[0020] Figure 3 This is a schematic front view of a spiral auxiliary structure of a manually pressed solution agitator according to the present invention;

[0021] Figure 4 It is a schematic side view of a spiral auxiliary structure of a manually pressed solution agitator of the present invention;

[0022] Figure 5 This is a schematic diagram of a screw hole of a bushing of a manually pressed solution agitator according to the present invention;

[0023] Figure 6 This is a schematic diagram of a barrel of a manually press-driven solution agitator of the present invention;

[0024] Figure 7 This is a schematic diagram of the installation of a manually pressure-driven solution agitator of the present invention;

[0025] In the figure: 1. agitator; 101. drive rod; 102. end cover; 103. screw; 1031. screw drive head; 1032. screw rod body; 104. return spring; 105. barrel; 1051. shaft collar; 1052. step surface; 1053. matching surface; 106. bushing; 1061. screw hole; 107. rotating drum; 108. thrust bearing; 109. rotating rod; 2. test bench; 201. bracket; 202. positioning support rod; 203. bracket nut; 3. beaker. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The technical problem to be solved by the present invention is to provide a solution for a push-type manual solution stirrer. Through the design of a spiral transmission mechanism and a spring return mechanism, the linear motion of the driving rod under the push is converted into the continuous rotation of the rotating rod through force transmission and conversion. The mechanism can achieve a continuously adjustable liquid stirring effect under manual drive. Its advantages of simple operation, reliable performance, strong adaptability and no side effects can provide a convenient and reliable solution stirrer alternative for current chemical experiments (such as solution preparation).

[0028] The solution agitator can achieve liquid-liquid or solid-liquid mixing efficiently and stably in the laboratory or on specific occasions. It avoids the safety risks of traditional electric agitators when used in explosive, flammable and other dangerous environments. In addition, the agitator does not require an external power supply, is easy to carry and operate, and is particularly suitable for field operations in the field or in an environment without power supply.

[0029] Embodiment 1:

[0030] like Figures 1 to 7 As shown, the mechanism of the push-type manual solution stirrer 1 is designed based on the principle of screw transmission, wherein the metal screw 103 performs linear motion, the bushing 106 cooperates with the screw 103 in the form of a screw pair, and the bushing 106 is fixedly connected (bonded) to the built-in rotating cylinder 107, and the two perform rotational motion relative to the metal screw 103. Let the lead of the screw 103 be L, the pitch be p, and the number of thread lines be n (n=1, single thread), then the displacement S of the screw 103 and the rotation angle ψ of the bushing 106 have the following relationship:

[0031] S=L*ψ / (2π), that is, ψ=S*(2π) / L, and since L=p*n, then ψ=S*(2π) / p.

[0032] Taking the derivative of the rotation angle ψ and displacement S on both sides of the above equation with respect to time t, we have: angular velocity ωψ=vs*(2π) / p.

[0033] By analogy, the rotation speed of the rotating ring is: n=ωψ / (2π)=vs / p Unit: r / s.

[0034] From the perspective of ergonomics, the present invention designs the screw 103 with a pitch of p=8mm, a rectangular cross section (length×width=6mm×1mm), and a material of stainless steel. If the pressing speed of the present design is vs=20mm / s, the rotation speed of the bushing 106, the internal rotating cylinder 107, and the rotating rod 109 is: n=2.5 r / s, which is 150rpm.

[0035] The current speed range of magnetic stirrers is 100-800 rpm, and the daily stirring reference speed in the chemical industry is 50 rpm. The design of the present invention basically meets the use requirements of chemical laboratories.

[0036] Embodiment 2:

[0037] like Figures 1 to 7 As shown, the push-type manual solution stirrer 1 is push-driven: the metal screw 103 is forced to move downward by manually pressing the driving rod 101. According to the working principle of the screw mechanism, the linear motion of the metal screw 103 is converted into the rotational motion of the bushing 106 and the built-in rotating cylinder 107 through the screw pair, and then drives the rotating rod 109 to rotate. During the downward movement of the metal screw 103, the return spring 104 is compressed and deformed to store energy. When the driving rod 101 reaches the stroke limit (that is, when it reaches the cover surface of the end cover 102 of the stirrer 1), the compression of the return spring 104 also reaches the maximum value.

[0038] Embodiment three:

[0039] like Figures 1 to 7 As shown, the press-type manual solution stirrer 1 resets and rotates: when the metal screw 103 reaches the stroke limit, the finger press stops, the reset spring 104 automatically resets and moves upward, and the metal screw 103 moves to the left relative to the bushing 106, driving the built-in rotating drum 107 and the rotating rod 109 to rotate twice, thereby realizing the reset rotation of the rotating rod 109 of the stirrer 1.

[0040] Embodiment 4:

[0041] like Figures 1 to 7As shown, the push-type manual solution stirrer 1 is separated into dynamic and static parts: in order to reduce the friction between the built-in rotating drum 107 and the bottom of the drum body 105 of the stirrer 1, reduce the friction and wear of the bottom of the drum body 105, maintain the smooth operation of the mechanism, and improve the transmission efficiency, a small micro-thrust ball plane bearing 108 (model: F8-16M, 8*16*5) is arranged between the bottom of the drum body 105 of the stirrer 1 and the built-in sleeve 107. In order to improve the positioning accuracy of the bearing 108, the race of the thrust bearing 108 is fixedly connected to the drum bottom by bonding.

[0042] Embodiment five:

[0043] like Figures 1 to 7 As shown, the spiral substructure of the push-type manual solution stirrer 1 is as follows: the metal screw 103 is composed of a screw driving head 1031 and a screw rod body 1032. The material of the screw driving head 1031 is plastic, and the material of the screw rod body 1032 is stainless steel, and the two are fixedly connected by plastic technology. The outer contour of the screw rod body 1032 is in contact with the inner contour surface of the bushing 106, and the two constitute a spiral substructure. When the metal screw 103 is driven by a driving force, it reciprocates along the axis in a straight line, and the bushing 106 is fixed in space, and only rotates under the spiral side effect, and drives the built-in rotating cylinder 107 to rotate (the built-in rotating cylinder 107 is fixedly connected to the bushing 106).

[0044] Embodiment six:

[0045] like Figures 1 to 7 As shown, the screw driving head 1031 of the push-type manual solution stirrer 1 and the metal screw rod body 1032 are generally connected by threaded connection or bonding process. The screw driving head 1031 has an outer diameter of 15mm and a thickness of 10mm. The built-in ring groove (the inner diameter of the ring groove is 8mm and the outer diameter is 18mm) is used to accommodate the reset spring 104 and lubricating oil. The material is plastic. The screw rod body 1032 has a pitch p=8mm and a rectangular cross-section (length×width=6mm×1mm). The metal screw 103 has a working stroke S=30mm and is made of stainless steel.

[0046] Embodiment seven:

[0047] like Figures 1 to 7 As shown, the outer diameter of the bushing 106 of the push-type manual solution stirrer 1 is Φ15mm, the screw hole 1061 is double-sector shaped, the hole diameter is Φ8mm, the sector angle θ=30º, the parallel sector spacing is 1mm, the transition arc R=2mm, as the inclusion surface of the cross section of the screw 103, its tolerance is distributed according to the "entry principle". In order to eliminate meshing conflict and ensure the transmission of the spiral pair, the edge of the inner hole is rounded by r=0.5mm.

[0048] Embodiment eight:

[0049] like Figures 1 to 7 As shown, the positioning structure of the push-type manual solution stirrer 1 is as follows: a shaft ring 1051 is set at the bottom of the stirrer 1 barrel 105, the shaft ring 1051 has a diameter of 30mm, and the outer diameter of the stirrer 1 barrel 105 is 18mm, and the two form a step surface 1052 (s1052=452mm2), and the right end surface of the sleeve is 3mm away from the step surface 1052, forming a matching surface 1053 (s1053=170mm2). When the stirrer 1 is in use, the step surface 1052 and the matching surface 1053 serve as the positioning reference surface for the stirrer 1 to cooperate with the positioning support rod 202, so as to limit the degree of freedom and precise positioning of the stirrer 1 barrel 105.

[0050] Embodiment nine:

[0051] like Figures 1 to 7 As shown, in the working state of the push-type manual solution stirrer 1, the stirrer 1 and the positioning support rod 202 of the test bench 2 are installed in a plug-in manner, that is, under manual pressing, the step surface 1052 and the matching surface 1053 of the stirrer 1 can be brought into contact with the upper surface and the inner surface of the positioning support rod 202 of the test bench 2 to achieve stable positioning. The positioning support rod 202 is fixed to the test bench bracket 201 by a threaded connection and is pre-tightened by the bracket nut 203, and its height can be adjusted according to the experimental requirements. This plug-in structure can achieve flexible positioning of the stirrer.

[0052] Compared with traditional stirring technology, the push-type manual solution stirrer has unique advantages:

[0053] 1. Its spiral pair-reset spring structure design allows the rotating rod 109 to continuously stir in the beaker 3 by intermittently pressing the driving rod 101 with fingers, which is very convenient in a power-free or mobile experimental environment, and the speed can also be adjusted by the pressing frequency.

[0054] 2. Its design rotation speed (0-150rpm) can meet the speed requirements of most experiments. The positioning structure and the design of the laboratory table bracket 201 can ensure the reliable positioning of the stirrer 1. The 20mm pressing stroke design also meets the structural and functional characteristics of fingers.

[0055] 3. The design of built-in micro-thrust ball plane bearing enables the built-in rotating drum and the drum body to achieve dynamic and static separation, and also transforms the sliding friction between the two into rolling friction between the bearing rolling elements and the shaft ring and seat ring, reducing friction loss.

[0056] 4. The overall design of the agitator is simple, adaptable, easy to operate, and easy to disassemble, clean and maintain.

[0057] In general, this agitator combines the simplicity of manual operation with the uniformity and efficiency of mechanical stirring, providing a new solution for chemical experiments with significant application value and wide practicality.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A push-type manual solution stirrer, characterized in that: The agitator (1) comprises a barrel (105), a screw (103), a bushing (106) and a rotating drum (107); the bushing (106) is fixedly connected to one end of the rotating drum (107); the bushing (106) and the rotating drum (107) are rotatably positioned inside the barrel (105); and the other end of the rotating drum (107) is connected to a rotating rod (109); The bushing (106) cooperates with the screw rod (103) in the form of a spiral pair, and the end of the screw rod (103) away from the bushing (106) is connected to a driving rod (101); The screw rod (103) is provided with a resetting device.

2. A push-type manual solution stirrer according to claim 1, characterized in that: The reset device is a reset spring (104); an end cover (102) is provided at one end of the barrel (105) away from the bushing (106); when the drive rod (101) moves to the cover surface of the end cover (102), the reset spring (104) reaches a maximum compression amount.

3. A push-type manual solution stirrer according to claim 2, characterized in that: A thrust bearing (108) is provided between the bottom of one end of the barrel (105) away from the end cover (102) and the sleeve (107).

4. The push-type manual solution stirrer according to claim 3, characterized in that: The bearing (108) is a small thrust ball plane bearing, model F8-16M, 8*16*5.

5. The push-type manual solution stirrer according to claim 4, characterized in that: The screw (103) has a pitch of 8 mm, the cross section of the screw (103) is rectangular, and the cross section of the screw (103) has a length of 6 mm and a width of 1 mm.

6. A push-type manual solution stirrer according to claim 5, characterized in that: The screw rod (103) is composed of a screw driving head (1031) and a screw rod body (1032). The material of the screw driving head (1031) is plastic, and the material of the screw rod body (1032) is stainless steel. The two are connected by threading or bonding.

7. A push-type manual solution stirrer according to claim 6, characterized in that: The screw driving head (1031) has an outer diameter of Φ15 mm and a thickness of 10 mm. The screw driving head (1031) has a built-in annular groove, the inner diameter of the annular groove is Φ8 mm and the outer diameter is Φ18 mm. The working stroke of the screw (103) is 30 mm.

8. The push-type manual solution stirrer according to claim 7, characterized in that: A screw hole (1061) is provided at the center of the bushing (106); the outer diameter of the bushing (106) is Φ15 mm; the screw hole (1061) is double-sector shaped, with a hole diameter of Φ8 mm, a sector angle of 30°, a parallel sector edge spacing of 1 mm, and a transition arc radius of 2 mm.

9. The push-type manual solution stirrer according to claim 8, characterized in that: The outer diameter of the barrel (105) is Φ18 mm; a shaft ring (1051) is provided at the bottom of the barrel (105), and the diameter of the shaft ring (1051) is Φ30 mm; the shaft ring (1051) and the bottom of the barrel (105) form a step surface (1052), and the right end surface of the barrel (105) is 3 mm away from the step surface (1052), forming a matching surface (1053).

10. The push-type manual solution stirrer according to claim 9, characterized in that: A test bench (2) is provided below the stirrer (1); a bracket (201) is provided on one side of the test bench (2); a height-adjustable positioning support rod (202) is connected to the bracket (201); the positioning support rod (202) is provided with a round sleeve; the stirrer (1) is installed on the round sleeve in a plug-in manner; the step surface (1052) and the matching surface (1053) are in surface contact with the upper surface and inner circular surface of the round sleeve, respectively, to achieve stable positioning.

Images