Reflux condenser for laboratory

Abstract

The utility model discloses a laboratory reflux condenser, and relates to the field of chemical engineering experimental instruments. The laboratory reflux condenser comprises a glass outer tube and a glass inner tube, and the glass inner tube is inserted into the glass outer tube in a penetrating mode. The glass outer pipe is respectively communicated with a water inlet pipe and a water outlet pipe; according to the utility model, the two groups of heat-conducting fins are symmetrically distributed on the glass inner tube in a staggered manner, so that when steam flows upwards along the glass inner tube, the steam can flow in an S shape under the action of the two groups of heat-conducting fins which are distributed in a staggered manner, the flowing time of the steam in the glass inner tube is prolonged, and the condensation effect on the steam is further improved; meanwhile, when the steam is in contact with the heat-conducting fins, the steam and the cooling water can be further subjected to heat exchange under the action of the heat-conducting fins, so that the heat exchange efficiency of the steam and the cooling water is remarkably improved, and the volatilization loss is effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical experimental instruments, in particular to a laboratory reflux condenser. Background Art

[0002] A reflux condenser is a laboratory device used to promote condensation. It is usually composed of two glass tubes, one inside and one outside. The smaller glass tube runs through the larger glass tube. It uses the principle of heat exchange to cool the condensable gas and condense it into liquid. It is generally used for reflux or distillation in organic chemical experiments. It can prevent volatilization loss and allow it to fully dissolve.

[0003] However, when the existing laboratory reflux condenser performs heat exchange to condense the steam generated by distillation into liquid, the reflux condenser is usually installed at the pressure relief port of the distillation tank. When the steam is ejected through the pressure relief port, due to the high ejection rate, the steam will flow upward rapidly in the smaller glass tube, so that the heat exchange time between the cooling water and the steam is short, which is not convenient for more sufficient condensation of the steam, and may cause greater loss of volatilization of the substance. In view of this, the present utility model is specially proposed. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a laboratory reflux condenser which can overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is: a laboratory reflux condenser, comprising: a glass outer tube and a glass inner tube, the glass inner tube is inserted in the glass outer tube; the glass outer tube is respectively connected to a water inlet pipe and a drain pipe; two groups of staggered heat conducting plates are symmetrically fixedly connected to the inner sides of the glass inner tube, and the ends of the two groups of heat conducting plates that are away from each other penetrate the glass inner tube and are located inside the glass outer tube.

[0006] In order to better improve the heat exchange efficiency of steam, further, the water inlet pipe and the drain pipe are respectively connected to the two sides of the glass outer tube, the water inlet pipe is arranged on the upper side of the glass outer tube, the drain pipe is arranged on the lower side of the glass outer tube, and the water outlet end of the drain pipe is higher than the water outlet end of the water inlet pipe.

[0007] In order to facilitate the protection of the drain pipe, further, a plurality of brackets for supporting and fixing the drain pipe are fixedly connected to one side of the glass outer tube close to the drain pipe.

[0008] In order to reduce weight and cost, further, the heat conductive sheet is an aluminum alloy plate.

[0009] In order to ensure the reflux effect of the droplets, the heat conducting sheet is further designed to be tilted downward.

[0010] In order to prevent the cooling water from being affected by the external temperature, the glass outer tube is further made of laminated glass.

[0011] After adopting the above technical scheme, the utility model has the following beneficial effects compared with the prior art: the utility model symmetrically and staggeredly distributes two groups of heat-conducting plates on the glass inner tube. When the steam flows upward along the glass inner tube, the steam can flow in an S shape under the action of the two groups of staggered heat-conducting plates, thereby increasing the flow time of the steam in the glass inner tube and further improving the condensation effect of the steam. At the same time, when the steam contacts the heat-conducting plates, the steam and the cooling water can perform further heat exchange under the action of the heat-conducting plates, thereby significantly improving the heat exchange efficiency between the steam and the cooling water and effectively reducing the volatilization loss.

[0012] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In the attached picture:

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the glass outer tube, water inlet pipe, drain pipe, heat conducting sheet, glass inner tube and bracket in the utility model;

[0016] Figure 3 It is a structural schematic diagram of the glass inner tube and the heat conducting plate in the utility model.

[0017] In the figure: 1. glass outer tube; 101. water inlet pipe; 102. drain pipe; 103. bracket; 2. glass inner tube; 201. heat conducting sheet. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0019] Embodiment 1:

[0020] Reference Figure 1-Figure 3The laboratory reflux condenser comprises: a glass outer tube 1 and a glass inner tube 2, wherein the glass inner tube 2 is inserted into the glass outer tube 1; the glass outer tube 1 is respectively connected with a water inlet pipe 101 and a drain pipe 102; two groups of staggered heat conducting plates 201 are symmetrically fixedly connected to both sides of the inner part of the glass inner tube 2, and the ends of the two groups of heat conducting plates 201 that are away from each other penetrate the glass inner tube 2 and are located inside the glass outer tube 1.

[0021] In the process of distilling the material, in order to prevent the steam generated by the distillation from carrying some substances out of the distillation tank and causing certain volatilization losses, the experimenter can install the reflux condenser at the pressure relief port of the distillation tank, that is, connect the air inlet of the glass inner tube 2 to the pressure relief port through a sealing plug, and then connect the water inlet pipe 101 with the external cooling water delivery equipment, and then connect the drain pipe 102 with the external cooling water recovery equipment, and finally start the external cooling water delivery equipment, so that the cooling water with lower temperature can be delivered into the glass outer tube 1 through the water inlet pipe 101 and discharged through the drain pipe 102, thereby ensuring that the cooling water flows in the glass outer tube 1. When the heated material generates steam to enter When entering the glass inner tube 2, the flowing cooling water and steam will exchange heat with each other through the glass inner tube 2, so that the steam can be condensed. At the same time, two groups of heat conducting plates 201 are symmetrically and staggeredly distributed on the glass inner tube 2. When the steam flows upward along the glass inner tube 2, the steam can flow in an S shape under the action of the two groups of staggered heat conducting plates 201, thereby increasing the flow time of the steam in the glass inner tube 2 and further increasing the condensation effect of the steam. At the same time, when the steam contacts the heat conducting plates 201, the steam and the cooling water can further exchange heat with each other under the action of the heat conducting plates 201, thereby significantly improving the heat exchange efficiency between the steam and the cooling water and effectively reducing the volatilization loss.

[0022] Embodiment 2:

[0023] Reference Figure 1-Figure 3The laboratory reflux condenser is basically the same as that of Example 1, and further, the water inlet pipe 101 and the drain pipe 102 are respectively connected to the two sides of the glass outer tube 1, the water inlet pipe 101 is arranged on the upper side of the glass outer tube 1, and the drain pipe 102 is arranged on the lower side of the glass outer tube 1, and the water outlet end of the drain pipe 102 is higher than the water outlet end of the water inlet pipe 101. By arranging the water inlet pipe 101 on the upper side of the glass outer tube 1 and the drain pipe 102 on the lower side of the glass outer tube 1, and making the water outlet end of the drain pipe 102 higher than the water outlet end of the water inlet pipe 101, when the cooling water enters the glass outer tube 1 through the water inlet pipe 101 and passes through the drain pipe 102 When discharged, the cooling water fluid and the steam fluid can form a convection relationship. According to the heat conduction theory, the heat conduction efficiency of the cold and hot fluids in the condenser during convection is higher than that during parallel flow, so the heat exchange effect on the steam is better. In addition, since the cooling water fills the glass outer tube 1 and flows out through the drain pipe 102, and the outlet of the drain pipe 102 is higher than the outlet of the water inlet pipe 101, the cooling water level in the glass outer tube 1 will not be lower than the upper end of the drain pipe 102 at least. Therefore, it can be ensured that there is always more cooling water in the glass outer tube 1, the heat exchange area for the steam is guaranteed, and its heat conduction efficiency can be guaranteed.

[0024] A plurality of brackets 103 for supporting and fixing the drain pipe 102 are fixedly connected to one side of the glass outer tube 1 close to the drain pipe 102. Figure 1 As shown, since the drain pipe 102 is relatively long, it is prone to the risk of breaking during use and installation. Therefore, by setting the bracket 103, the stability of the drain pipe 102 can be improved, effectively improving the service life of the reflux condenser and the safety of the experimenter during use.

[0025] Embodiment 3:

[0026] Reference Figure 1-Figure 3 The laboratory reflux condenser is basically the same as Example 2, and furthermore: the heat conductive sheet 201 is an aluminum alloy plate. By making the heat conductive sheet 201 of an aluminum alloy plate, not only can the heat exchange effect on the steam be guaranteed, but also the structure is relatively light, and the production cost is also low, and the practicability is high.

[0027] The heat conducting plate 201 is designed to be tilted downward. By tilting the heat conducting plate 201 downward on the glass inner tube 2, when the steam condenses into droplets, it is convenient for the droplets to flow back downward into the distillation tank, thereby ensuring the reflux effect of the droplets.

[0028] The glass outer tube 1 is laminated glass. By using laminated glass to make the glass outer tube 1, the thermal insulation effect of the glass outer tube 1 can be improved to avoid a certain temperature impact on the cooling water in the glass outer tube 1 when the external temperature is high, thereby affecting the condensation effect of steam.

[0029] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention.

Claims

1. Laboratory reflux condenser, characterized in that, include: A glass outer tube (1) and a glass inner tube (2), wherein the glass inner tube (2) is inserted into the glass outer tube (1); The glass outer tube (1) is respectively connected to a water inlet pipe (101) and a drain pipe (102); Two groups of staggered heat conducting plates (201) are symmetrically fixedly connected to the inner sides of the glass inner tube (2); the ends of the two groups of heat conducting plates (201) that are away from each other penetrate the glass inner tube (2) and are located inside the glass outer tube (1).

2. The laboratory reflux condenser according to claim 1, characterized in that The water inlet pipe (101) and the drain pipe (102) are respectively connected to the two sides of the glass outer tube (1); the water inlet pipe (101) is arranged on the upper side of the glass outer tube (1); the drain pipe (102) is arranged on the lower side of the glass outer tube (1); and the water outlet end of the drain pipe (102) is higher than the water outlet end of the water inlet pipe (101).

3. The laboratory reflux condenser according to claim 2, characterized in that A plurality of brackets (103) for supporting and fixing the drain pipe (102) are fixedly connected to a side of the glass outer tube (1) close to the drain pipe (102).

4. The laboratory reflux condenser according to claim 1, characterized in that The heat conducting sheet (201) is an aluminum alloy plate.

5. The laboratory reflux condenser according to claim 1, characterized in that The heat conducting sheet (201) is designed to be inclined downward.

6. The laboratory reflux condenser according to claim 1, characterized in that The glass outer tube (1) is laminated glass.

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