Laboratory titrating solution storage device

Abstract

The utility model provides a laboratory titrating solution storage device, and belongs to the technical field of burettes. Comprising a burette, a storage mechanism and a fixing mechanism, the storage mechanism comprises a liquid bin, a conveyor is installed at the bottom end of the liquid bin, a sliding sleeve slidably sleeves the outer side of one end of the conveyor, a piston rod is slidably inserted into one end of the conveyor, and a piston sleeves the end, located in the conveyor, of the piston rod; the other end of the piston rod is fixedly connected with the inner side of the sliding sleeve, a first one-way valve and a second one-way valve are installed at the upper end and the lower end of the interior of the conveyor respectively, the top end of the first one-way valve is communicated with the bottom end of the liquid bin, the bottom end of the second one-way valve is sleeved with a connector, and the connector is movably inserted into the top end of a burette; the practicability of the titrating solution storage device in the laboratory can be effectively improved, and the titrating solution storage device has high practical value.

Description

Technical Field

[0001] The utility model relates to the technical field of burettes, and more particularly to a storage device for laboratory titrating solutions. Background Art

[0002] A burette is a commonly used vessel in laboratory chemical analysis. When in use, a certain amount of titrating solution is generally poured from a pre-prepared reagent into the burette using a small measuring cup for titration.

[0003] Based on the above, the inventor found the following problems: In current chemical analysis titrations, the amount of reagent used varies depending on the standards of the water samples. According to the operating procedures, the excess reagent in the measuring cup is not allowed to be poured back into the reagent storage device. Therefore, when using a measuring cup to add reagent, it may result in insufficient or excessive reagent, causing waste, and the transfer of reagent using a measuring cup is prone to secondary contamination, affecting the accuracy of chemical analysis data.

[0004] Therefore, in view of this, the existing structure and deficiencies are studied and improved to provide a storage device for laboratory titrating solutions, with the aim of achieving a more practical value. Summary of the Utility Model

[0005] To solve the above technical problems, an embodiment of the utility model provides a storage device for laboratory titrating solutions, which is specifically implemented through the following technical solutions:

[0006] A storage device for laboratory titrating solutions includes a burette, a storage mechanism, and a fixing mechanism. The storage mechanism includes a liquid chamber. A conveyor is installed at the bottom end of the liquid chamber. A sliding sleeve is slidably sleeved on the outer side of one end of the conveyor. A piston rod is slidably inserted into one end of the conveyor. A piston is sleeved on the inner end of the piston rod located inside the conveyor. The other end of the piston rod is fixedly connected to the inner side of the sliding sleeve. First and second one-way valves are respectively installed at the upper and lower ends inside the conveyor. The top of the first one-way valve communicates with the bottom end of the liquid chamber. A connecting head is sleeved at the bottom of the second one-way valve. The connecting head is movably inserted into the top end of the burette.

[0007] Further, a spring is sleeved on the outer side of the inner end of the piston rod located inside the sliding sleeve. One end of the spring is connected to one end of the conveyor, and the other end of the spring is connected to the inner side wall of the sliding sleeve.

[0008] The beneficial effect of adopting the above further solution is that by installing the spring, the piston rod can automatically rebound, thereby sucking the titrating solution inside the liquid chamber into the conveyor.

[0009] Further, the fixing mechanism includes a pair of fixing brackets, and the pair of fixing brackets are respectively arranged on both sides of the upper end of the connecting head.

[0010] The beneficial effect of adopting the above further solution is that by installing a fixing bracket, it is convenient to improve the firmness of the connection of the connector.

[0011] Further, movable grooves are formed on both opposite surfaces of the fixing bracket, and a bidirectional lead screw is rotatably connected inside each movable groove.

[0012] The beneficial effect of adopting the above further solution is that by installing a bidirectional lead screw, when it rotates, it can drive the sliders to move relatively.

[0013] Further, sliders are threadedly connected to both ends of the bidirectional lead screw, and clamping blocks are fixedly installed between the two pairs of sliders.

[0014] The beneficial effect of adopting the above further solution is that by installing clamping blocks, when the clamping blocks move relatively along with the sliders, the two sides of the upper end of the burette can be clamped and fixed, improving the stability of the liquid chamber at the upper end of the burette.

[0015] Further, one end of each bidirectional lead screw penetrates through the movable groove and extends to the outside, and a knob is sleeved on each of them.

[0016] The beneficial effect of adopting the above further solution is that by installing knobs, it is convenient for users to control the rotation of the bidirectional lead screw.

[0017] Further, buffer pads are installed on the inner side walls of the clamping blocks, and the buffer pads are made of silica gel.

[0018] The beneficial effect of adopting the above further solution is that by installing buffer pads made of silica gel, damage to the burette during clamping can be avoided.

[0019] Further, a cover plate is threadedly connected to the upper end of the liquid chamber, and a third one-way valve is embedded and installed at the center of the upper end surface of the cover plate.

[0020] The beneficial effect of adopting the above further solution is that by installing a cover plate, it is convenient to seal the liquid chamber, and by installing a third one-way valve, when the conveyor sucks the titrant into the liquid chamber, it will not be unable to be sucked out due to negative pressure.

[0021] The beneficial effects of the present utility model are as follows: A storage device for laboratory titrant obtained by the above design of the present utility model. By setting up a liquid chamber, it is convenient for users to store the titrant inside the liquid chamber. By installing a conveyor at the bottom of the liquid chamber, a piston rod is slidably inserted inside the conveyor, and a piston is sleeved at one end thereof. When the piston rod moves, the piston also moves inside the conveyor accordingly. When the piston rod is pulled outwards, negative pressure is generated inside the conveyor, thereby causing the first one-way valve to open and the second one-way valve to close. The titrant inside the liquid chamber enters the inside of the conveyor through the first one-way valve. When the piston rod is pushed inwards, the first one-way valve closes and the second one-way valve opens, enabling the titrant to enter the connector through the second one-way valve and then be conveyed into the burette. The user pulls and pushes the piston rod, thus facilitating the filling of the burette with the titrant. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0023] Figure 1 A three-dimensional structural diagram of a storage device for laboratory titrant provided by the present utility model;

[0024] Figure 2 A three-dimensional structural diagram of the storage mechanism of a storage device for laboratory titrant provided by the present utility model;

[0025] Figure 3 A three-dimensional internal structural diagram of the storage mechanism of a storage device for laboratory titrant provided by the present utility model;

[0026] Figure 4 A side sectional view of the fixing bracket of a storage device for laboratory titrant provided by the present utility model;

[0027] Figure 5 A side sectional view of the conveyor of a storage device for laboratory titrant provided by the present utility model.

[0028] In the figure: 100, burette; 200, storage mechanism; 2001, liquid chamber; 2002, conveyor; 2003, sliding sleeve; 2004, connector; 2005, cover plate; 2006, piston rod; 2007, piston; 2008, spring; 2009, first one-way valve; 2010, second one-way valve; 300, fixing mechanism; 3001, fixing bracket; 3002, knob; 3003, clamping block; 3004, movable groove; 3005, bidirectional lead screw; 3006, slider. Specific embodiments

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0030] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0031] Embodiment 1 of a laboratory titrant storage device of the present utility model

[0032] The present utility model provides the following technical solutions: As Figures 1-5As shown in the figure, a laboratory titrant storage device includes a burette 100, a storage mechanism 200 and a fixing mechanism 300. The storage mechanism 200 includes a liquid chamber 2001. A conveyor 2002 is installed at the bottom end of the liquid chamber 2001. A sliding sleeve 2003 is slidably sleeved on the outer side of one end of the conveyor 2002. A piston rod 2006 is slidably inserted into one end of the conveyor 2002. A piston 2007 is sleeved on the inner end of the piston rod 2006 located inside the conveyor 2002. The other end of the piston rod 2006 is fixedly connected to the inner side of the sliding sleeve 2003. A first one-way valve 2009 and a second one-way valve 2010 are respectively installed at the upper and lower ends inside the conveyor 2002. The top end of the first one-way valve 2009 communicates with the bottom end of the liquid chamber 2001. A connector 2004 is sleeved at the bottom end of the second one-way valve 2010. The connector 2004 is movably inserted into the top end of the burette 100. By providing the liquid chamber 2001, it is convenient for the user to store the titrant inside the liquid chamber 2001. By installing the conveyor 2002 at the bottom end of the liquid chamber 2001, the piston rod 2006 is slidably inserted into the inner side of the conveyor 2002, and a piston 2007 is sleeved on one end of it. When the piston rod 2006 is pushed, the piston 2007 also moves inside the conveyor 2002 accordingly. When the piston 2007 is pulled outwards, a negative pressure is generated inside the conveyor 2002, which causes the first one-way valve 2009 to open and the second one-way valve 2010 to close. The titrant inside the liquid chamber 2001 enters the inside of the conveyor 2002 through the first one-way valve 2009. When the piston 2007 is pulled inwards, the first one-way valve 2009 closes and the second one-way valve 2010 opens, allowing the titrant to enter the inside of the connector 2004 through the second one-way valve 2010 and then be conveyed into the burette 100. The user pulls and pushes the piston rod 2006, thus facilitating the filling of the burette 100 with the titrant.

[0033] Embodiment 2 of a laboratory titrant storage device of the present utility model

[0034] Refer to Figures 1-5As shown, a spring 2008 is sleeved outside one end of the piston rod 2006 located inside the sliding sleeve 2003. The two ends of the spring 2008 are respectively connected to one end of the conveyor 2002 and the inner side wall of the sliding sleeve 2003. The fixing mechanism 300 includes a pair of fixing frames 3001. The pair of fixing frames 3001 are respectively arranged on both sides of the upper end of the connector 2004. Activity grooves 3004 are formed on the two opposite surfaces of the pair of fixing frames 3001. A bidirectional lead screw 3005 is rotatably connected inside each of the activity grooves 3004. Both ends of the bidirectional lead screw 3005 are threadedly connected with sliders 3006. Clamping blocks 3003 are fixedly installed between the two pairs of sliders 3006. One end of each of the bidirectional lead screws 3005 penetrates through the activity groove 3004 and extends to the outside, and a knob 3002 is sleeved on each of them. By installing the spring 2008, the piston rod 2006 can automatically rebound, and then suck the titrant inside the liquid storage tank 2001 into the conveyor 2002. By installing the fixing frame 3001, it is convenient to improve the firmness of the connection of the connector 2004. By installing the bidirectional lead screw 3005, when it rotates, it can drive the sliders 3006 to move relatively. By installing the clamping blocks 3003, when the clamping blocks 3003 move relatively with the sliders 3006, the two sides of the upper end of the burette 100 can be clamped and fixed, improving the stability of the liquid storage tank 2001 at the upper end of the burette 100. By installing the knobs 3002, it is convenient for the user to control the rotation of the bidirectional lead screw 3005.

[0035] Embodiment Three of a Laboratory Titrant Storage Device of the Present Utility Model

[0036] Referring to Figures 1-5 As shown, buffer pads are installed on the inner side walls of the clamping blocks 3003, and the buffer pads are made of silica gel. The upper end of the liquid storage tank 2001 is threadedly connected with a cover plate 2005, and a third one-way valve is embedded and installed at the center of the upper end surface of the cover plate 2005. By installing the buffer pads made of silica gel, damage to the burette 100 during clamping can be avoided. By installing the cover plate 2005, it is convenient to seal the liquid storage tank 2001, and by installing the third one-way valve, when the conveyor 2002 sucks the titrant inside the liquid storage tank 2001, it will not be unable to be sucked out due to negative pressure.

[0037] Specifically, the working principle of the laboratory titrant storage device: When in use, insert the connector 2004 into the upper opening of the burette 100. There is a gap between the connector 2004 and the burette 100 without sealing. Subsequently, the user rotates the knob 3002 to drive the bidirectional lead screw 3005 to rotate. When the bidirectional lead screw 3005 rotates, the slider 3006 can be used to drive the clamping block 3003 to move relatively, thereby clamping and fixing the outer side of the burette 100. Subsequently, the user reciprocally pushes the sliding sleeve 2003. One end of the inner side of the sliding sleeve 2003 is connected to one end of the piston rod 2006. A piston 2007 is sleeved on one end of the piston rod 2006. When the piston rod 2006 moves, the piston 2007 also moves inside the conveyor 2002 accordingly. When the piston 2007 is pulled outwards, negative pressure is generated inside the conveyor 2002, thereby opening the first one-way valve 2009 and closing the second one-way valve 2010. The titrant inside the liquid storage tank 2001 enters the inside of the conveyor 2002 through the first one-way valve 2009. When the piston 2007 is pushed inwards, the first one-way valve 2009 closes and the second one-way valve 2010 opens, enabling the titrant to enter the inside of the connector 2004 through the second one-way valve 2010, and then being conveyed into the burette 100. This facilitates the user to accurately squeeze the titrant into the burette 100 according to the scale line on the burette 100. When the user releases the sliding sleeve 2003, the sliding sleeve 2003 resets under the elastic force of the spring 2008, facilitating the user to add titrant into the burette 100.

[0038] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, various changes and modifications can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A laboratory titration liquid storage device, characterized in that: The invention comprises a burette (100), a storage mechanism (200) and a fixing mechanism (300), wherein the storage mechanism (200) comprises a liquid bin (2001), a conveyor (2002) is installed at the bottom end of the liquid bin (2001), a sliding sleeve (2003) is slidably sleeved on the outer side of one end of the conveyor (2002), a piston rod (2006) is slidably inserted at one end of the conveyor (2002), and the piston rod (2006) is located inside the conveyor (2002) and sleeved at one end thereof with a piston ( 2007), the other end of the piston rod (2006) is fixedly connected to the inner side of the sliding sleeve (2003), the upper and lower ends of the interior of the conveyor (2002) are respectively installed with a first one-way valve (2009) and a second one-way valve (2010), the top end of the first one-way valve (2009) is communicated with the bottom end of the liquid bin (2001), and the bottom end of the second one-way valve (2010) is sleeved with a connector (2004), and the connector (2004) is movably inserted into the top end of the burette (100).

2. A laboratory titration solution storage device according to claim 1, characterized in that: A spring (2008) is sleeved on the outer side of one end of the piston rod (2006) located inside the sliding sleeve (2003), one end of the spring (2008) is connected to one end of the conveyor (2002), and the other end of the spring (2008) is connected to the inner wall of the sliding sleeve (2003).

3. A laboratory titration solution storage device according to claim 1, characterized in that: The fixing mechanism (300) comprises a pair of fixing frames (3001), and the pair of fixing frames (3001) are respectively arranged on both sides of the upper end of the connecting head (2004).

4. A laboratory titration solution storage device according to claim 3, characterized in that: A pair of fixed frames (3001) are provided with movable grooves (3004) on two opposite surfaces, and the insides of the movable grooves (3004) are rotatably connected with bidirectional screw rods (3005).

5. A laboratory titration solution storage device according to claim 4, characterized in that: Both ends of the bidirectional screw rod (3005) are threadedly connected with sliders (3006), and clamping blocks (3003) are fixedly installed between the two pairs of sliders (3006).

6. A laboratory titration solution storage device according to claim 5, characterized in that: One end of the bidirectional screw rod (3005) passes through the movable groove (3004) and extends to the outside, and is sleeved with a knob (3002).

7. A laboratory titration solution storage device according to claim 6, characterized in that: The inner side walls of the clamping block (3003) are all provided with buffer pads, and the buffer pads are made of silicone material.

8. A laboratory titration solution storage device according to claim 1, characterized in that: The upper end of the liquid tank (2001) is threadedly connected to a cover plate (2005), and a third one-way valve is embedded and installed at the center of the upper end surface of the cover plate (2005).

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