CN201876378U - Integral temperature, pressure and flow measurement and sampling device - Google Patents

Abstract

The utility model relates to an integral temperature, pressure and flow measurement and sampling device. The device can reduce the damage to a pipe wall caused by the too many measuring points installed on the pipe wall, so that the security is improved and the pipe life is prolonged. The integral sampling device lowers the requirements to measurement space during the measurement, and ensures that the measurement is easier to realize. A sampling probe is installed, fixed and positioned outside the pipe, so that the sampling measurement to minor caliber pipe is realized. The device comprises the sampling probe which is connected with a sampling barrel body through a connecting pipe. The sampling barrel body is hermetically connected with temperature, pressure and flow measurement components respectively.

Description

An integral temperature, pressure, flow measurement sampling device

technical field

The utility model relates to an integral temperature, pressure and flow measurement sampling device.

Background technique

At present, there is an integrated sampling device for pressure and temperature measurement in China, but it has the following two defects: one is that it can only measure static pressure but not total pressure; Applied in the field of mechanical efficiency test.

The current sampling probe is fixed by clamping the inner and outer walls of the pipeline. When fixing, the fluid in the pipeline needs to be emptied, and the installer enters the inside of the pipeline to fix it. When it is necessary to adjust the direction, it is more cumbersome and wastes a lot of manpower and time; When the pipe diameter is small, it cannot be installed from the inside and cannot be used.

Utility model content

The purpose of this utility model is to solve the above problems and provide an integral temperature, pressure, flow measurement and sampling device, which can reduce the damage to the pipe wall caused by installing too many measuring points on the pipe wall, thereby increasing its safety , prolong the life of the pipeline; the integrated sampling device reduces the requirements for the measurement space during measurement, making the measurement easier to achieve.

In order to achieve the above object, the utility model adopts the following technical solutions:

An integral temperature, pressure and flow measurement sampling device includes a sampling probe connected to a sampling cylinder through a connecting pipe, and the sampling cylinder is respectively sealed and connected to temperature, pressure and flow measurement components.

The sampling probe is fixed on the pipeline through a pipe collar.

The connecting pipeline is provided with a ball valve.

The sampling cylinder body is respectively provided with three internally threaded pipe collars, and the temperature, pressure and flow measuring components are respectively connected to the sampling cylinder through respective internally threaded pipe collars.

The pressure measurement component includes a needle valve, a pressure pipe, and a pressure transmitter connected in sequence, and the needle valve is connected with an internal thread pipe collar.

The temperature measuring element is a temperature sleeve installed downward at the center of the top of the sampling cylinder.

The flow measurement component includes a needle valve, a pressure pipe, a float flowmeter, and a drain pipe connected in sequence, and the needle valve is connected with an internal thread pipe collar.

The outside of the sampling cylinder is provided with an insulation layer.

The main components of the utility model are: sampling probe, ball valve, sampling cylinder, temperature sleeve, pressure measuring part, flow measuring part, cylinder insulation layer, ball valve, seal and so on. The sampling probe is fixed on the pipe wall, one end goes deep into the pipe, and the other end is connected to the sampling cylinder through a ball valve. The temperature sleeve is installed downward at the center of the top of the sampling cylinder to measure the temperature; the lower part of the side of the sampling cylinder Holes are respectively opened on the top and the pressure and flow measurement connectors are drawn out to measure the pressure and flow. The pressure measurement components include: needle valve, pressure pipe, pressure transmitter, etc., and the flow measurement components include: needle valve, pressure pipe, rotameter, drain pipe, etc.

The utility model adopts a combined sampling method for the measurement fluid, which improves the accuracy of the test, simplifies the sampling equipment and system, reduces damage to the main pipeline, reduces installation links and installation space, and is convenient for sampling when the flow direction is changed and the dynamic pressure is measured. The adjustment of the nozzle direction and the centralized arrangement of measuring points are beneficial to the debugging and monitoring of the measuring device and reduce the difficulty of operation.

The positioning of the sampling nozzle of the device is accurate, and when the flow direction of the fluid in the pipeline changes, the sampling direction of the nozzle can be changed more conveniently without entering the inside of the pipeline, and the installation is convenient. When the ball valve of the flow measurement part is closed, the total pressure of the main flow part can be easily measured, combined with the static pressure measurement, the flow velocity of the measurement part can be simply calculated, and then the pipeline flow can be estimated.

The fluid in the sampling device is flowing, the distance between the temperature measuring part and the main pipeline is close, and the cylinder has external insulation to ensure the accuracy of temperature measurement.

Through the external flow measurement device, the flow rate of the sampled water flow can be measured, and the efficiency test of the water pump/turbine and other equipment can be completed without measuring the flow rate of the pipeline.

The sampling probe and the fixing device adopt fixed pipe collars to achieve the dual functions of accurate positioning and preventing the probe from rotating after being impacted by the fluid.

The sampling probe and the measuring cylinder are connected by a ball valve, and other measuring devices other than the sampling probe can be removed without stopping the machine.

The utility model has the following positive and beneficial effects:

Through an opening in the main pipeline, all measurements of pressure, temperature, and flow can be completed, reducing damage to the main pipeline, especially in places where the measurement space is limited, it can complete measurements that are difficult for other measuring instruments; it can complete the flow of the main pipeline Efficiency testing of water pumps/turbines and other equipment under the condition that it cannot be measured; it can be used on pipelines with small diameters; the rectification sampling device is easy to carry, dismantling and assembling on site is simple and fast, the direction of the sampling probe is easy to adjust, and the positioning is accurate, saving a lot of money manpower, material resources and time.

Description of drawings

Fig. 1 is the overall assembly drawing of the present utility model;

Fig. 2 is a sampling probe;

Fig. 3 is a sampling cylinder;

Fig. 4 is connecting pipe;

Figure 5 is an internally threaded pipe clamp.

Among them, 1. Internal thread pipe collar, 2. Sampling cylinder, 3. Connecting pipe, 4. Ball valve, 5. Sampling probe, 6. Pipe collar, 7. Pipeline, 8. Insulation layer.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

In Fig. 1, the sampling probe 5 is fixed on the pipe 7 through the pipe collar 6, and connected to the sampling cylinder 2 through the ball valve 4, the connecting pipe 3, and the connecting pipe 3 and the inner threaded pipe collar 1 are all welded on the sampling cylinder 1. The integrated temperature measuring device with external thread is installed on the top of the sampling cylinder 1, the lower right part of the sampling cylinder 1 passes through the needle valve and is connected to the pressure measuring part, and the upper left opening is connected to the flow measuring device after passing through the needle valve. The connection between the temperature, pressure and flow measuring parts and the sampling cylinder 1 has a good sealing design.

The sampling probe and the upper part shown in Figure 2 have obvious opening orientation marks. After determining the installation orientation according to the direction of water flow, the sampling probe can be fixed on the pipe wall through the pipe collar 6. The design feature of this part is that the orientation of the sampling probe opening can be easily adjusted according to the change of the water flow direction, and there are obvious positioning marks.

The purpose of designing the ball valve 4 is to isolate the sampling probe 5 from other measuring devices. If the measuring device including the sampling cylinder 2 is blocked, the ball valve 4 can be closed for inspection and maintenance; When it is in the running state, after the ball valve 4 is closed, other measuring devices can be removed without affecting the operation.

The temperature measuring sleeve is installed in the center of the sampling cylinder 2, and the opening of the flow measuring device is at its root, so that the water sample can flow through the temperature sleeve relatively fully, which increases the sensitivity of temperature measurement; the sampling cylinder 2 and other parts Both have designed the insulation layer 8 to prevent the water sample from exchanging heat with the external environment, thus improving the accuracy of temperature measurement.

When it is not necessary to measure the flow of the water sample taken, the needle valve of the flow measuring part can be closed, so that the measured pressure is the total pressure of the fluid in the pipeline 7, combined with the static pressure measurement, the flow of the pipeline 7 can be roughly calculated.

The utility model can measure the flow rate of the sampling fluid while measuring the pressure and temperature. The sampling probe 5 and the fixing device are positioned by card slots, so as to realize the dual functions of accurate positioning and preventing the probe from rotating after being impacted by the fluid. The external fixing method of 5 sampling probes solves the problems in three aspects: it can be installed without entering the pipe, small-diameter pipes can also be used, and the direction of the probe can be adjusted without draining the fluid in the pipe. An insulation layer 8 is added to the sampling device to isolate external heat exchange and improve measurement accuracy.

Claims (9)

1. An integral temperature, pressure, flow measurement sampling device, characterized in that it includes a sampling probe, the sampling probe is connected to the sampling cylinder through a connecting pipe, and the sampling cylinder is respectively sealed with temperature, pressure and flow measurement components . 2. Integral temperature, pressure, flow measurement sampling device as claimed in claim 1, is characterized in that, described sampling probe is fixed on the pipeline by pipe clamp, and sampling probe and fixing device adopt draw-in slot location, realize accurate positioning and The dual function of preventing the probe from rotating after being impacted by the fluid. 3. The integrated temperature, pressure and flow measurement sampling device according to claim 1, characterized in that, the sampling probe is installed and positioned outside the pipeline. 4. The integrated temperature, pressure and flow measurement sampling device as claimed in claim 1, wherein a ball valve is arranged on the connecting pipeline. 5. The integrated temperature, pressure and flow measurement sampling device as claimed in claim 1, characterized in that, the sampling cylinder body is respectively provided with three internally threaded pipe collars, and the temperature, pressure and flow measurement components pass through the respective The inner threaded pipe collar is connected with the sampling cylinder. 6. The integrated temperature, pressure and flow measurement sampling device as claimed in claim 1 or 4, characterized in that, the pressure measurement component comprises a needle valve, a pressure pipe, and a pressure transmitter connected in sequence, and the needle valve and the internal Threaded hose clamp connection. 7. The integrated temperature, pressure, and flow measurement sampling device according to claim 1 or 4, wherein the temperature measuring element is a temperature sleeve arranged at the center of the top end of the sampling cylinder and installed downward. 8. The integrated temperature, pressure and flow measurement sampling device as claimed in claim 1 or 4, characterized in that, the flow measurement components include sequentially connected needle valves, pressure pipes, float flowmeters, drain pipes, and needle valves. Connect with internally threaded pipe clamps. 9. The integral temperature, pressure and flow measurement sampling device according to claim 1, characterized in that, an insulating layer is provided outside the sampling cylinder.

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