Full-automatic COD (Chemical Oxygen Demand) digestion instrument capable of adjusting gas flow velocity

Abstract

The utility model discloses a full-automatic COD (Chemical Oxygen Demand) digester capable of adjusting gas flow velocity, which comprises a digestion vessel, a bent breather pipe is fixedly connected to the inner side of the digestion vessel, a lower communicating hole is formed in one end of the breather pipe, a plurality of groups of side communicating holes are formed in one end of the breather pipe, a sleeve is sleeved on the outer side of one end of the breather pipe, and the other end of the breather pipe is provided with a plurality of groups of side communicating holes. A control plate is fixedly connected to the interior of the sleeve, an upper communicating hole right facing the lower communicating hole is formed in the middle of the control plate, control grooves are formed in the two sides of the interior of the control plate, a connecting piece is fixedly connected to the lower portion of the sleeve, a rotating piece is fixedly connected to the lower portion of the connecting piece, and the rotating piece is rotationally connected to the outer side of the ventilation pipe; the outer side of one end of the breather pipe is fixedly connected with a fixing plate, a nitrogen injection device is added in the digestion instrument, the flow rate of nitrogen injection can be controlled, a sample can be effectively protected, and therefore the accuracy and reliability of an analysis result are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of digestion appearance, concretely is a kind of adjustable gas flow rate COD full-automatic digestion appearance. BACKGROUND

[0002] COD digestion appearance, also called COD reflux digestion appearance or COD intelligent digestion appearance, is a kind of experimental instrument for determining chemical oxygen demand (COD), mainly applied in environmental protection, scientific research, monitoring and other fields.

[0003] The existing COD digestion appearance cannot pass air into gas in the process of gas digestion, and the digestion appearance often needs to use high temperature or high pressure in the analysis process, which can easily lead to changes or volatilization of the components in the sample. By passing nitrogen, the sample can be effectively protected to avoid unnecessary changes during analysis, thereby ensuring the accuracy and reliability of the analysis results. We propose a kind of adjustable gas flow rate COD full-automatic digestion appearance, which can pass nitrogen into the digestion appearance, and can adjust the flow rate of nitrogen according to the demand. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of adjustable gas flow rate COD full-automatic digestion appearance to solve the problems raised in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of adjustable gas flow rate COD full-automatic digestion appearance, including digestion dish, the inside fixedly connected with bent air pipe in digestion dish, the lower communication hole is opened in the inside of the one end of air pipe, the side communication hole is opened in the inside of the one end of air pipe in several groups, the sleeve of sleeve is equipped on the outside of the one end of air pipe, the control board is fixedly connected in the inside of sleeve, the upper communication hole that is opposite lower communication hole is opened in the middle part of control board, the control groove is opened in the inside of control board both sides, the connecting piece is fixedly connected in the lower part of sleeve, the rotating piece is fixedly connected in the lower part of connecting piece, the rotating piece is rotatably connected on the outside of air pipe, the fixed plate is fixedly connected on the outside of the one end of air pipe.

[0006] Preferably, the condenser tube is sleeved on the upper part of the digestion dish, the connecting pipe is sleeved on the inner side of the upper part of the condenser tube, and the containing dish is sleeved on the outer side of the other end of the connecting pipe.

[0007] Preferably, the fixed plate is fixedly connected with a tooth ring on the upper part, and the sleeve is provided with a tooth groove matched with the tooth ring on the lower part.

[0008] Preferably, the fixed plate is fixedly connected with a spring on the lower part, and the spring is sleeved on the outside of the air pipe.

[0009] Preferably, the condenser pipe is sleeved with a sleeve, an isolation pipe is fixedly connected in the sleeve, a plurality of groups of air holes are formed in the isolation pipe, an air inlet pipe is fixedly connected to one side of the lower part of the sleeve, and an air outlet pipe is fixedly connected to one side of the upper part of the condenser pipe.

[0010] Preferably, the digestion dish is provided with a heating plate at the lower part.

[0011] Compared with the prior art, the digestion device has the advantages that:

[0012] 1、The nitrogen gas is injected from the sleeve, enters the digestion dish through the upper communication hole and the lower communication hole, and then enters the inside of the digestion dish through the air pipe, the sleeve is slid upward, the tooth ring is separated from the tooth groove, the sleeve is rotated, the communication area of the control groove and the side communication hole is changed, and then the flow rate of the gas is controlled, the condensed gas returns to the digestion dish, the nitrogen gas injection device is added in the digestion instrument, and the flow rate of the nitrogen gas injection can be controlled, the sample can be effectively protected, and then the accuracy and reliability of the analysis result are ensured.

[0013] 2、The steam enters the condenser pipe, the cold air is injected into the air inlet pipe, the cold air enters between the sleeve and the isolation pipe, is blown to the condenser pipe through the air hole, and then is discharged through the air outlet pipe, the flow rate of the cold air on the surface of the condenser pipe can be increased, and the heat exchange efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is a first perspective three-dimensional structure schematic view of the utility model;

[0015] Fig. 2 It is a second perspective three-dimensional structure sectional view of the utility model;

[0016] Fig. 3 It is a third perspective sleeve structure sectional view of the utility model.

[0017] In the drawing: 1, digestion dish;2, air pipe;3, condenser pipe;4, sleeve;5, connecting pipe;6, containing dish;7, isolation pipe;8, air hole;9, air inlet pipe;10, air outlet pipe;11, lower communication hole;12, side communication hole;13, sleeve;14, control plate;15, upper communication hole;16, control groove;17, connecting piece;18, rotating piece;19, fixed plate;20, spring;21, tooth ring;22, tooth groove;23, heating plate. DETAILED DESCRIPTION

[0018] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0019] Please refer to Figs. 1-3 The utility model provides a technical scheme: a kind of adjustable gas flow rate COD full-automatic digester, including digestion dish 1, and the inside of digestion dish 1 is fixedly welded with curved air pipe 2, and the inside of air pipe 2 one end is provided with lower communication hole 11, and the inside of air pipe 2 one end is provided with several groups of side communication hole 12, and the outside of air pipe 2 one end is equipped with sleeve 13, and the inside of sleeve 13 is fixedly welded with control panel 14, and the middle of control panel 14 is provided with upper communication hole 15, and the inside of control panel 14 two sides is provided with control groove 16, and nitrogen is injected by sleeve 13, after passing through upper communication hole 15 and lower communication hole 11, by air pipe 2 into the inside of digestion dish 1, by rotating sleeve 13, change the communication area of control groove 16 and side communication hole 12, to control the flow rate of gas, and the lower part of sleeve 13 is fixedly welded with connecting piece 17, and the lower part of connecting piece 17 is fixedly welded with rotating piece 18, and rotating piece 18 is rotatably connected to the outside of air pipe 2, and the outside of air pipe 2 one end is fixedly welded with fixed plate 19, to ensure that sleeve 13 can move up and down along air pipe 2 and rotate, and sleeve 13 cannot be separated from the upper portion of air pipe 2;

[0020] The upper part of the digestion dish 1 is sleeved with a condenser tube 3, the inner side of the upper part of the condenser tube 3 is sleeved with a connecting pipe 5, the outer side of the other end of the connecting pipe 5 is sleeved with a holding dish 6, the liquid held by the holding dish 6 enters the digestion dish 1 through the connecting pipe 5 and the condenser tube 3, the steam heated by the digestion dish 1 is condensed in the condenser tube 3 and then returns to the digestion dish 1, so that the digestion is more sufficient; the upper part of the fixed plate 19 is fixedly welded with a tooth ring 21, the lower part of the sleeve 13 is provided with a tooth groove 22 matched with the tooth ring 21, the sleeve 13 can be rotated arbitrarily by sliding upward to make the tooth ring 21 disengage from the tooth groove 22, the rotation of the sleeve 13 is locked by inserting the sleeve 13 downward and inserting the tooth ring 21 into the tooth groove 22; the lower part of the fixed plate 19 is fixedly welded with a spring 20, the spring 20 is sleeved outside the air pipe 2, the spring 20 prevents the tooth ring 21 from disengaging from the tooth groove 22 by pushing the rotating piece 18; the outer side of the condenser tube 3 is sleeved with a sleeve pipe 4, the inner side of the sleeve pipe 4 is fixedly welded with an isolation pipe 7, a plurality of groups of air holes 8 are formed in the inner side of the isolation pipe 7, the lower part of one side of the sleeve pipe 4 is fixedly welded with an air inlet pipe 9, the upper part of one side of the condenser tube 3 is fixedly welded with an air outlet pipe 10, cold air is injected into the air inlet pipe 9, the cold air enters between the sleeve pipe 4 and the isolation pipe 7 and is blown to the condenser tube 3 through the air holes 8, and then is discharged through the air outlet pipe 10, so that the flow rate of the cold air on the surface of the condenser tube 3 is increased and the heat exchange efficiency is improved; the lower part of the digestion dish 1 is provided with a heating plate 23, so that the heating of the digestion dish 1 is conveniently controlled.

[0021] Working principle: when the utility model is used, nitrogen is injected into the sleeve 13, enters the inside of the digestion dish 1 through the upper communication hole 15 and the lower communication hole 11 after passing through, the sleeve 13 is rotated by sliding upward to make the tooth ring 21 disengage from the tooth groove 22, the communication area of the control groove 16 and the side communication hole 12 is changed, so that the flow rate of the gas is controlled, the rotation of the sleeve 13 is locked by the spring 20 pushing the rotating piece 18 and the tooth ring 21 inserting into the tooth groove 22, the liquid held by the holding dish 6 enters the digestion dish 1 through the connecting pipe 5 and the condenser tube 3, the heating plate 23 heats the digestion dish 1, the steam enters the condenser tube 3, the cold air is injected into the air inlet pipe 9, the cold air enters between the sleeve pipe 4 and the isolation pipe 7 and is blown to the condenser tube 3 through the air holes 8, and then is discharged through the air outlet pipe 10, so that the flow rate of the cold air on the surface of the condenser tube 3 is increased and the heat exchange efficiency is improved, and the condensation returns to the digestion dish 1, so that the digestion is more sufficient.

[0022] It is to be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0023] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A COD automatic digestion instrument with adjustable gas flow rate, comprising a digestion dish (1), characterized in that: The inside of the digestion dish (1) is fixedly connected with a bent ventilation pipe (2), one end of the ventilation pipe (2) is internally provided with a lower communication hole (11), a plurality of groups of side communication holes (12) are internally provided in one end of the ventilation pipe (2), a sleeve (13) is externally provided in one end of the ventilation pipe (2), a control plate (14) is fixedly connected inside the sleeve (13), an upper communication hole (15) is provided in the middle of the control plate (14) and faces the lower communication hole (11), control grooves (16) are provided on both sides of the control plate (14), a connecting piece (17) is fixedly connected to the lower part of the sleeve (13), a rotating piece (18) is fixedly connected to the lower part of the connecting piece (17), the rotating piece (18) is rotatably connected to the outside of the ventilation pipe (2), and a fixed plate (19) is fixedly connected to one end of the ventilation pipe (2).

2. The COD automatical digester of claim 1, wherein: The upper part of the digestion dish (1) is provided with a condenser tube (3), the inner side of the upper part of the condenser tube (3) is provided with a connecting pipe (5), and the other end of the connecting pipe (5) is externally provided with a containing dish (6).

3. The COD automatical digester of claim 1, wherein: The upper part of the fixed plate (19) is fixedly connected with a tooth ring (21), and the lower part of the sleeve (13) is provided with a gear groove (22) matched with the tooth ring (21).

4. The COD automatical digester of claim 1, wherein: The lower part of the fixed plate (19) is fixedly connected with a spring (20), and the spring (20) is externally provided with the ventilation pipe (2).

5. The COD automatical digester of claim 2, wherein: The outside of the condenser tube (3) is provided with a sleeve pipe (4), the inside of the sleeve pipe (4) is fixedly connected with an isolation pipe (7), a plurality of groups of ventilation holes (8) are internally provided in the isolation pipe (7), an air inlet pipe (9) is fixedly connected to one side of the lower part of the sleeve pipe (4), and an air outlet pipe (10) is fixedly connected to one side of the upper part of the condenser tube (3).

6. The COD automatical digester of claim 1, wherein: The lower part of the digestion dish (1) is provided with a heating plate (23).

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