Flow blocking measuring instrument for capillary manifold of multi-channel condenser

Abstract

The utility model discloses a flow blocking measuring instrument for a capillary manifold of a multi-channel condenser, and belongs to the technical field of air tightness detection. Comprising an air supply assembly connected with any channel of a workpiece to be detected, and a plurality of detection assemblies connected with other channels respectively, the air supply assembly comprises an air supply source, a pressure reducing valve, an air inlet valve and a total flow meter which are arranged in sequence; the tail end of the total flow meter is connected to a channel through a hose; the detection assembly comprises branch flow meters connected with other channels. According to the utility model, the air supply assembly and the detection assembly are arranged, and the flow of each channel is accurately measured, so that an abnormal state can be accurately identified, and blockage analysis is carried out; a pressure reducing valve is matched with a pressure sensor to accurately regulate and control the pressure and flow velocity of input gas; and an expansion assembly is arranged to enhance the detection function.

Description

TECHNICAL FIELD

[0001] The utility model relates to airtightness detection technical field especially relates to a kind of multi-channel condenser capillary manifold flow measuring instrument. BACKGROUND

[0002] Multi-channel condenser capillary manifold is widely applied to various refrigeration, heat dissipation systems as a kind of key condenser component. Its structural features are that multiple branch pipes are arranged on a main pipe, forming a multi-channel system. In the assembly process of condenser and subsequent maintenance stage, it is an important prerequisite to ensure the normal flow and no blockage of each branch pipe channel to guarantee the efficient and stable operation of the entire condenser and even the entire system.

[0003] At present, the detection means commonly used in the industry is as follows: select one of the multi-channel condenser capillary manifolds as a channel one, connect it with external gas source to realize gas supply function; the remaining channels are respectively connected with gas pipes, and the other end of the gas pipe is immersed in water, and the operator observes whether there is bubble escaping from each gas pipe port by naked eye. If there is bubble, it is determined that the corresponding channel can realize gas flow, that is, the channel is identified as qualified. However, this detection method relying on manual visual observation has inherent defects. On the one hand, long time visual observation is easy to cause fatigue of the operator, resulting in frequent missed detection; on the other hand, when there is only partial blockage in the channel, gas flow can still pass through the narrow blockage part under certain pressure and form bubbles in water, so that the existing detection means cannot accurately identify this partial blockage hidden danger condition. In fact, even if there is only partial blockage, it will greatly affect the actual working performance of the condenser, such as reducing refrigeration efficiency, increasing energy consumption and even shortening equipment service life.

[0004] In view of the above problems, the applicant designs a flow measuring instrument for multi-channel condenser capillary manifold based on the airtightness detection experience in multiple fields, so as to better apply to complex and changeable detection environment and provide strong technical support for timely and accurately finding various abnormal conditions of capillary manifold. UTILITY MODEL CONTENT

[0005] The utility model aims at solving the above problems in the prior art, and provides a multi-channel condenser capillary manifold flow measuring instrument.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A multi-channel condenser capillary manifold flow measuring instrument, comprising: a gas sending assembly connected with any one channel of the workpiece to be measured, and a plurality of detection assemblies respectively connected with other channels;

[0008] The air feeding assembly comprises, in sequence, an air supply source, a pressure reducing valve, an air inlet valve and a total flow meter; the tail end of the total flow meter is connected to a channel through a hose;

[0009] The detection assembly comprises a partial flow meter connected to other channels.

[0010] In some embodiments, the air feeding assembly further comprises a pressure sensor arranged at the tail end of the air inlet valve and an inlet temperature sensor.

[0011] The detection assembly further comprises an outlet temperature sensor arranged at the front end of the partial flow meter.

[0012] In some embodiments, the detection assembly is connected to the channel of the workpiece to be measured through a tee pipe; one branch of the tee pipe is connected to the channel of the workpiece to be measured, one branch is connected to the detection assembly, and the other branch is connected to the expansion assembly; each branch of the tee pipe is provided with an on-off valve.

[0013] In some embodiments, the expansion assembly is a vacuum pumping device.

[0014] In some embodiments, the expansion assembly is a flow meter detection connecting pipe; the other end of the flow meter detection connecting pipe is connected to a corresponding partial flow meter of another channel.

[0015] In some embodiments, the air feeding assembly and the detection assembly are installed through a support assembly.

[0016] The support assembly comprises a base plate, a clamping plate fixed on the base plate and supporting the air feeding assembly, and a support seat placed on the base plate and supporting the detection assembly.

[0017] In some embodiments, the top end of the clamping plate is provided with an open clamping groove, and elastic members are arranged inwardly on both sides of the clamping groove.

[0018] The elastic members are composed of a semicircular spring plate and a flat plate inwardly folded at the end of the semicircular spring plate; an arc corner is arranged at the connection between the semicircular spring plate and the flat plate.

[0019] In some embodiments, the clamping plate is provided with no less than two.

[0020] In some embodiments, the support seat comprises a clamping opening at the top, a support rod connected to the lower end of the clamping opening, and a base arranged at the lower end of the support rod.

[0021] In some embodiments, a junction box is further arranged on the base plate.

[0022] Compared with the prior art, the multi-channel condenser capillary manifold flow blockage detector has the following beneficial effects.

[0023] 1. The utility model discloses a set up air sending assembly, detection assembly, can accurately identify the abnormal state through the accurate measurement of the flow of each channel, and carries out the jam analysis, set up pressure reducing valve cooperation pressure sensor, accurately control the pressure of input gas, flow rate, set up extension assembly, strengthen detection function.

[0024] 2. The utility model discloses through the installation of support component, flexible use, and adapt to different models of the workpiece to be measured, set up the jack box, after the wiring of each detection assembly is gathered, connect to industrial computer, more neat, reliable, set up workpiece in place sensor, detect whether the workpiece is placed above, and can set up trigger starting air sending assembly.

[0025] The other advantages, objects and features of the utility model will be described in the subsequent specification to some extent, and to some extent, based on the study of the following text, it will be obvious to those skilled in the art, or can be taught from the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the module structure schematic of the utility model Figure 1 .

[0027] Figure 2 It is the module structure schematic of the utility model Figure 2 .

[0028] Figure 3 It is the use state schematic drawing of the utility model.

[0029] Figure 4 It is the structure schematic drawing of the utility model.

[0030] Figure 5 It is the overhead structure schematic drawing of the utility model.

[0031] Figure 6 It is the partial structure schematic drawing of the utility model.

[0032] Figure 7 It is the state schematic drawing of the card board and support.

[0033] Figure 8 It is the structure schematic drawing of the card board.

[0034] Figure 9 It is the side structure schematic drawing of the card board.

[0035] Figure 10 It is the use state schematic drawing of the support.

[0036] Figure 11 It is the use state front view of the support.

[0037] Figure 12 Figure 2 is a side view of the support in use.

[0038] Figure 13 Figure 3 is a structural schematic view of the support.

[0039] Figure 14 Figure 4 is a lower side structural schematic view of the support.

[0040] Figure 15 Figure 5 is a structural frame schematic view.

[0041] Figure 16 Figure 6 is a detection flow schematic view.

[0042] In the figure:

[0043] 1, base plate; 2, clamping plate; 21, clamping groove; 22, elastic member; 23, top pressing screw; 3, support; 31, clamping opening; 32, support rod; 33, base; 4, junction box. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0045] Referring to Figures 1-16 A multi-channel condenser capillary manifold flow blockage detector comprises a gas feeding assembly connected with any one channel of a workpiece to be measured and a plurality of detection assemblies respectively connected with other channels.

[0046] Generally, the channel closest to the edge position is taken as channel one, the gas feeding assembly is connected, and a gas with appropriate pressure and flow rate is fed into the workpiece to be measured; the other channels are taken as gas outlet channels, and the gas outlet amount is measured by the detection assembly to determine the degree of blockage.

[0047] The gas feeding assembly comprises, in sequence, a gas supply source, a pressure reducing valve, an inlet valve, and a total flow meter.

[0048] The tail end of the total flow meter is connected to one channel (channel one for gas inlet) through a hose.

[0049] It can be understood that the tail end of the hose is provided with a quick connector or the like to connect with the channel.

[0050] The detection assembly comprises a partial flow meter connected with the other channels.

[0051] In use, the gas supply source provides gas supply, which is fed into the workpiece to be measured through the opened inlet valve, the total flow meter, and the hose after pressure regulation by the pressure reducing valve. It should be noted that the connection points should be sealed to avoid affecting the detection results.

[0052] Further, the air feeding assembly further comprises: a pressure sensor arranged at the tail end of the air inlet valve, and an inlet temperature sensor.

[0053] Correspondingly, by the measurement of the pressure sensor, the pressure reducing valve can be accurately controlled; by the temperature data of the gas when entering obtained by the inlet temperature sensor, temperature compensation calculation can be performed in cooperation with the conversion formula.

[0054] The detection assembly further comprises: an outlet temperature sensor arranged at the front end of the flow divider.

[0055] Thus, the temperature data of the gas when flowing out of each channel can be obtained by the outlet temperature sensor; the heat conversion in each channel can be calculated; and the position away from the air inlet end can also be judged in cooperation with the flow data (the farther away from the air inlet end, the longer the path of the gas, and the greater the corresponding temperature and pressure changes).

[0056] In some embodiments, the detection assembly is connected to the channel of the workpiece to be tested through a three-way pipe.

[0057] Among them, one way of the three-way pipe is connected to the channel of the workpiece to be tested, one way is connected to the detection assembly, and the other way is connected to the expansion assembly; correspondingly, each way of the three-way pipe is provided with an on-off valve to switch the loop.

[0058] Under normal conditions, the on-off valve corresponding to one way of the expansion assembly is in a closed state, and the on-off valves corresponding to the other two ways are in an open state; the airflow enters the detection assembly through the three-way pipe for daily detection.

[0059] In some embodiments, the expansion assembly is a vacuum pump.

[0060] At this time, the air tightness of the connection mode can be measured by the vacuum pump.

[0061] For example, when detecting the air tightness through test channel two, the air inlet valve is closed, and the on-off valves corresponding to the three-way pipes of the other channels are all closed; the two on-off valves corresponding to the detection assembly and the expansion assembly on the three-way pipe of channel two are opened; then, the tail end of the expansion assembly is connected to the vacuum pump; by the vacuum extraction condition, it is judged whether there is air tightness deficiency at each connection point.

[0062] In some embodiments, the expansion assembly is a flow meter detection connection pipe.

[0063] In use, the other end of the flow meter detection connection pipe is connected to the corresponding flow divider of the other channel.

[0064] For example Figure 2As shown; when measuring the rightmost flow meter, the tail end of this flow meter is connected to the flow meter detection connection pipe of the previous channel; except for the open / close valve connected to the workpiece on the rightmost tee pipe, all other open / close valves connected to the workpiece are closed, and the flow meter detection connection pipe is connected to the flow meters in sequence; repeat this process to connect adjacent flow meters; at this time, under the air flow detection state, if all flow meters are normal, then the data of each flow meter should be consistent; if the data of a certain flow meter is inconsistent, it can be determined that this flow meter is abnormal, or that multiple other flow meters are abnormal at the same time.

[0065] In some embodiments, it further includes an industrial control computer.

[0066] Correspondingly, the air supply component and the detection component are both connected to the industrial control computer for adjustment and control.

[0067] like Figure 3 As shown, the industrial computer can be a vertical structure, which is more convenient for batch testing; the industrial computer is equipped with components such as a display and result indicator lights; preferably, the air supply component is set inside the structural shell, and only the air supply structure is led outward and connected to a hose.

[0068] The result indicator lights include a pass light and an audible and visual alarm light, which respectively display different statuses.

[0069] like Figure 15 As shown; preferably, the industrial control computer is equipped with an analog signal acquisition card, which communicates with each sensor through the analog signal acquisition card.

[0070] In some embodiments, the industrial control computer is equipped with a flow analysis module.

[0071] The flow analysis module analyzes whether there is a leak by comparing the total flow meter with the sum of the individual flow meters.

[0072] Simply put, if the value of the total flow meter is greater than the sum of the values ​​of the individual flow meters, it can be determined that there is an airtightness abnormality.

[0073] Furthermore, if the flow rate of the introduced gas is less than the preset flow rate of the gas delivery component, and the value of the total flow meter is equal to the sum of the values ​​of the individual flow meters, then it can be determined that there is a blockage in channel one (the channel connected to the gas delivery component).

[0074] In some embodiments, the flow analysis module analyzes whether there are any channels with anomalies by comparing the differences between the individual flow meters.

[0075] Understandably, there are preset normal traffic ranges for each channel; if the traffic of a certain channel is lower than its lower limit, then the channel is considered to be abnormal.

[0076] Further, the flow analysis module can also calculate the degree of blockage according to the comparison between the actual flow data and the normal flow range.

[0077] The simple calculation formula of the blockage rate is: ; wherein the theoretical gas flow is obtained according to the pre-standardized test measurement.

[0078] When the actual gas flow is equal to the lower limit of the theoretical gas flow range, the blockage rate is 0%, indicating no blockage; when the actual gas flow is less than the lower limit of the theoretical gas flow range, the blockage rate is greater than 0%, and the smaller the actual flow, the higher the blockage rate; by calculating the ratio of the actual flow to the lower limit of the theoretical flow, the degree of blockage can be quantified.

[0079] In some embodiments, the flow analysis module is further provided with a temperature compensation algorithm.

[0080] By detecting the temperature and flow data collected under the environment, the flow data at a specific working temperature is calculated.

[0081] It can be understood that the flow of gas is affected at different working temperatures; in order to improve the accuracy, a temperature compensation algorithm is designed.

[0082] Let the known standard working temperature be T0, the corresponding standard flow be Q0, the current measured working temperature be T1, and the temperature coefficient of the gas be (the coefficient is determined by a large number of experiments on the material of the capillary manifold, the characteristics of the gas, etc. and stored in the database), and a relationship model of flow and temperature is constructed using the linear regression principle.

[0083] The temperature deviation value is calculated as .

[0084] Then the actual flow Q m at any working temperature is .

[0085] For example, it is known that the standard flow of a certain type of capillary manifold at the standard working temperature of 25℃ is , the gas temperature coefficient is , and the measured working temperature is 30℃; then the temperature deviation value is , and the actual flow is .

[0086] Through this algorithm, the influence of temperature factors on flow measurement can be compensated, making the flow detection result more accurate and reliable.

[0087] In some embodiments, the industrial computer is provided with a template configuration module; different parameters are set corresponding to different workpiece models to form preset templates corresponding to the models; and the parameters are read and loaded during detection. For example, the optimal gas flow rate, pressure, and gas flow rate value of each channel.

[0088] Further, the industrial computer is also provided with a statistical module; the detection results are automatically stored to form detection records and the qualified rate within a period of time is counted.

[0089] In some embodiments, it further includes a code scanning component; the code scanning component is in communication connection with the industrial computer; the model of the workpiece to be detected is identified by reading the two-dimensional code of the workpiece, and the corresponding template is automatically retrieved and loaded with the relevant parameters.

[0090] It can be understood that the code scanning component is a high-definition camera; and the corresponding workpiece is provided with an identity recognition code.

[0091] In some embodiments, the gas feeding component and the detection component are installed through a support component.

[0092] The support component includes a base plate 1, a clamping plate 2 fixed on the base plate 1 to support the gas feeding component, and a support seat 3 placed on the base plate 1 to support the detection component.

[0093] The base plate 1 provides a basic installation and placement position; the clamping plate 2 and the support seat 3 are arranged above the base plate 1.

[0094] The clamping plate 2 is provided with no less than two to form at least two support points to fix the workpiece to be detected.

[0095] In order to adapt to the outer diameters of different models of workpieces, the clamping plate 2 is adaptively set.

[0096] Specifically, the top end of the clamping plate 2 is provided with an open clamping groove 21, and elastic members 22 are arranged on both sides of the clamping groove 21 and are folded inward; wherein the elastic members 22 are composed of a semicircular elastic piece and a flat plate folded inward at the end of the semicircular elastic piece; and the connection between the semicircular elastic piece and the flat plate is provided as an arc angle.

[0097] In use, the workpiece to be detected is directly clamped downward, or the elastic members 22 are bent upward and then the workpiece to be detected is placed; under the restoring action of the elastic members 22, the workpiece is stably clamped.

[0098] Further, a notch is provided below the clamping groove 21, and a threaded connection top pressing screw 23 is provided upwardly.

[0099] Thus, the workpiece to be detected can be lifted upward by the top pressing screw 23 to further expand the adaptation range.

[0100] It can be understood that when the diameter of the workpiece is smaller, the elastic member 22 cannot be clamped, and the like; at this time, the top pressure screw 23 is rotated upward by a part, and the workpiece is pushed.

[0101] In some embodiments, the support 3 comprises: a top open bayonet 31, a support rod 32 connected at the lower end of the bayonet 31, and a base 33 provided at the lower end of the support rod 32.

[0102] Among them, the bayonet 31 is greater than one-half of a circle, and the upper end is bent inward on both sides.

[0103] Further, the support rod 32 is an adjustable telescopic rod; the support height can be adjusted.

[0104] It can be understood that the specifications of the detection assembly are fixed; the support 3 only has one specification.

[0105] Further, the lower end of the base 33 is embedded with a magnet; correspondingly, the base plate 1 is made of a material that can be attracted by the magnet; or, a magnetic strip that cooperates with the magnet is provided on the base plate; to place the base 33 more stably.

[0106] It should be noted that since the workpiece to be measured has multiple models, there are also different numbers of channels, and the spacing between the channels also varies; in order to be more flexible, the support 3 is set to be movable through magnetic attraction; it can be placed and adjusted in position on the base plate 1.

[0107] In some embodiments, the base plate 1 is also provided with a concentrator box 4, which collects the wiring of each detection assembly and is connected to the industrial computer; it can be understood that the concentrator box 4 and the industrial computer are both provided with sockets.

[0108] In some embodiments, the base plate 1 is provided below the position corresponding to the workpiece to be measured with a workpiece in-place sensor.

[0109] Among them, the workpiece in-place sensor can adopt various forms such as photoelectric sensor, magnetic induction sensor, etc., so as to be able to detect whether there is a workpiece above, that is.

[0110] It can be understood that the workpiece in-place sensor feeds back the detection signal to the industrial computer.

[0111] Further, the workpiece in-place sensor can trigger the automatic start of the air supply assembly.

[0112] When the device is in use, the industrial computer is started to initialize the program, the workpiece to be measured is placed in place by hand, and after connection and adjustment, the test signal is automatically triggered to start the air supply assembly, and the inflation valve of the gas source is opened; the gas enters the workpiece to be measured through the pressure reducing valve, the inlet valve and the total flow meter; then, according to the measured values of each sensor, it is calculated whether there is a blockage in each channel.

[0113] The utility model discloses, set up air sending assembly, detection subassembly, can accurately identify the abnormal state through the accurate measurement of the flow of each channel, and carry out the jam analysis, set up pressure reducing valve cooperation pressure sensor, accurately control the pressure, flow rate of input gas, set up the temperature sensor of entry end can cooperate conversion formula, carry out temperature compensation calculation, set up extension subassembly, strengthen detection function, air sending assembly, detection subassembly communication connection to industrial computer, by industrial computer adjustment, control, more intelligent, efficient, the industrial computer is vertical structure, more convenient batch detection, set up result indicating lamp to show different state respectively, set up template configuration module, correspond to different workpiece model respectively, set up different parameters, form the preset template of corresponding model, set up the code scanning subassembly, read the two -dimensional code of the workpiece to be measured and identify the model of workpiece, automatically call corresponding template, load relevant parameters, install through support subassembly, use flexible, and adapt to different model workpiece to be measured, set up the jack box 4, after the wiring of each detection subassembly is gathered, connect to industrial computer, more neat, reliable, set up workpiece in place sensor, detect whether the workpiece is placed on the top, and can set up trigger start air sending assembly.

[0114] The above, only for the preferred specific implementation mode of the utility model, but the protection scope of the utility model does not limit to this, any skilled in the art person in the utility model disclosed technical range, according to the utility model technical scheme and the utility model concept of the utility model, add up to equivalent replacement or change, all should cover in the protection scope of the utility model.

Claims

1. A multi-pass condenser capillary manifold flow blockage meter characterized by, The utility model relates to a kind of gas supply system for testing workpiece, including: The gas supply component connected with any one channel of the workpiece to be measured, and multiple detection components connected with other channels respectively; The gas supply component includes: gas supply source, pressure reducing valve, inlet valve, total flow meter arranged in sequence;The tail end of the total flow meter is connected to a channel by hose; The detection component includes: sub-flow meter connected with other channels.

2. The multi-pass condenser capillary manifold flow blockage meter of claim 1, wherein, The gas supply component further includes: pressure sensor, inlet temperature sensor arranged at the tail end of inlet valve; The detection component further includes: outlet temperature sensor arranged at the front end of sub-flow meter.

3. The multi-pass condenser capillary manifold flow blockage meter of claim 1, wherein, The detection component is connected with the channel of the workpiece to be measured by three-way pipe;One way of the three-way pipe is connected to the channel of the workpiece to be measured, one way is connected to the detection component, and the other way is connected to the expansion component;Each way of the three-way pipe is provided with open-close valve.

4. The multi-pass condenser capillary manifold flow blockage meter of claim 3, wherein, The expansion component is vacuumizing device.

5. The multi-pass condenser capillary manifold flow blockage meter of claim 3, wherein, The expansion component is flow meter detection connecting pipe;The other end of the flow meter detection connecting pipe is connected to the corresponding sub-flow meter of other channel.

6. The multi-pass condenser capillary manifold flow blockage meter of claim 1 wherein, The gas supply component and detection component are installed by support component; The support component includes: base plate (1), clamping plate (2) fixed on base plate (1) and supporting gas supply component, and support (3) placed on base plate (1) and supporting detection component.

7. The multi-pass condenser capillary manifold flow blockage meter of claim 6, wherein, The top end of the clamping plate (2) is provided with open clamping groove (21), and elastic member (22) is arranged on both sides of the clamping groove (21) and inwardly folded; The elastic member (22) is composed of semicircular elastic sheet and flat plate inwardly folded at the end of semicircular elastic sheet;The connection of semicircular elastic sheet and flat plate is provided with arc angle.

8. The multi-pass condenser capillary manifold flow blockage meter of claim 6, wherein, The clamping plate (2) is provided with not less than two.

9. The multi-pass condenser capillary manifold flow blockage meter of claim 6, wherein, The support (3) includes: clamping hole (31) with open top, support rod (32) connected at the lower end of clamping hole (31), and base (33) arranged at the lower end of support rod (32).

10. The multi-pass condenser capillary manifold flow blockage meter of claim 1 wherein, The base plate (1) is further provided with junction box (4).

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