A device for measuring parameters of annular gap fluid

Abstract

The invention discloses a device for measuring parameters of an annular gap fluid, comprising a base, a core column and a swing block, wherein the core column is fixedly connected to the base, the swing block is connected to the base through a rotating shaft, a through hole is provided on the swing block, the core column is penetrated in the through hole, the core column and both ends of the through hole are sealed by an elastic sealing ring, an annular gap is formed between the surface of the core column and the inner wall of the through hole, the core column is provided with a liquid inlet channel and a liquid outlet channel, the liquid inlet channel and the liquid outlet channel are respectively connected to both ends of the annular gap, and the pressure liquid enters the annular gap from the liquid inlet channel and flows out from the liquid outlet channel, the base is provided with an adjustment component, and the adjustment component drives the swing block to rotate to change the concentricity of the surface of the core column and the inner wall of the through hole. The invention is convenient for adjusting the concentricity of the core column and the through hole and keeping the two parallel, which is convenient for experimental operation.

Description

Technical Field

[0001] The invention relates to the technical field of physical measurement, in particular to a device for measuring parameters of an annular gap fluid. Background Art

[0002] The study of annular gap fluid parameters is very important in fluid mechanics research and engineering practice. At present, the annular gap fluid parameter measurement devices all adopt fixed structure forms, that is, when studying the annular gap formed by the concentric structure and the annular gap formed by the eccentric structure, the corresponding devices are made for measurement respectively. By measuring the leakage volume of the leakage outlet under the pressure of the non-passing fluid, the flow rate of the fluid under different pressures in the maximum eccentricity and concentric state can be tested. These devices cannot change the eccentricity of the annular gap, so it is not conducive to quickly changing the eccentricity in teaching and research and performing multiple measurements. In addition, in the annular gap structure composed of the outer jacket and the inner core, it is also important to ensure the parallelism of the axis of the outer jacket and the inner core for measurement. Summary of the invention

[0003] In view of the above-mentioned defects of the prior art, the present invention provides an annular gap fluid parameter measuring device to solve the problem that the eccentricity of the annular gap cannot be adjusted and ensure the parallelism of the axes of the outer shell and the inner core.

[0004] The technical solution of the present invention is as follows: A device for measuring fluid parameters in an annular gap comprises a base, a core column and a swing block, wherein the core column is fixedly connected to the base, the swing block is connected to the base via a rotating shaft, a through hole is provided on the swing block, the core column is passed through the through hole, the core column and both ends of the through hole are sealed by an elastic sealing ring, an annular gap is formed between the surface of the core column and the inner wall of the through hole, the core column is provided with a liquid inlet channel and a liquid outlet channel, the liquid inlet channel and the liquid outlet channel are respectively connected to the two ends of the annular gap, pressure liquid enters the annular gap from the liquid inlet channel and flows out from the liquid outlet channel, the base is provided with an adjusting component, the adjusting component drives the swing block to rotate to change the concentricity of the surface of the core column and the inner wall of the through hole.

[0005] Furthermore, in order to facilitate adjustment and stabilize the swing block, the adjustment assembly includes an elastic member and an adjustment screw, and the elastic member and the adjustment screw are respectively located on both sides of the swing block. When the adjustment screw is rotated, the elastic force of the elastic member on the swing block is changed.

[0006] Furthermore, in order to accurately control the degree of eccentricity between the swing block and the core column, the base is provided with a distance sensor, and the distance sensor is used to measure the swing distance of the swing block.

[0007] Furthermore, the distance sensor is a micrometer or a dial indicator.

[0008] Furthermore, a spiropyran polyurethane mechanochromic ring is provided between the swing block and the core column, the spiropyran polyurethane mechanochromic ring is sleeved on the core column, and the swing block is transparent at the position of the spiropyran polyurethane mechanochromic ring. When the swing block is eccentric with the core column, different positions of the spiropyran polyurethane mechanochromic ring present different colors, so as to intuitively display the eccentricity of the annular gap and facilitate learners to observe.

[0009] Furthermore, in order to improve the flow stability and uniformity of the liquid flowing through the annular gap, the core column is provided with an annular gap section, and the surface of the annular gap section and the inner wall of the through hole constitute the annular gap, and the two ends of the annular gap section are respectively provided with a liquid inlet annular groove and a liquid outlet annular groove, and the circumference of the liquid inlet annular groove is provided with a plurality of liquid inlets connected to the liquid inlet channel, and the circumference of the liquid outlet annular groove is provided with a plurality of liquid outlets connected to the liquid outlet channel.

[0010] Furthermore, the liquid inlets are equally distributed in the circumferential direction of the liquid inlet annular groove, and the liquid outlets are equally distributed in the circumferential direction of the liquid outlet annular groove.

[0011] Furthermore, the inlet of the liquid inlet channel and the outlet of the liquid outlet channel are arranged at two ends of the core column.

[0012] Furthermore, in order to facilitate the measurement of flow rate, the outlet of the liquid outlet channel is connected to a measuring cylinder.

[0013] Furthermore, the measuring cylinder is fixedly connected to the base, and a drain valve is arranged at the bottom of the measuring cylinder.

[0014] The advantages of the technical solution provided by the present invention are:

[0015] By setting a swing block, the swing block rotates along its axis under the adjustment of the adjustment component to change the positional relationship with the core column, thereby adjusting the concentricity of the through hole of the core column and the swing block, and obtaining a ring gap structure with variable concentricity, which is convenient for conducting corresponding experiments according to needs. By adjusting in this way, it can be ensured that the axis of the through hole is always parallel to the axis of the core column during adjustment. A force-induced color ring is used to display the force between the swing block and the core column, thereby intuitively displaying the eccentricity, which is convenient for showing to learners. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of a device for measuring fluid parameters with an annular gap.

[0017] Figure 2 It is a schematic diagram of the front view structure of a device for measuring fluid parameters with an annular gap.

[0018] Figure 3 It is a structural diagram of the core column.

[0019] Figure 4 It is a structural diagram of the swing block.

[0020] Figure 5 It is a schematic diagram of the cross-section structure of the core column and the swing block. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with examples. It should be understood that these examples are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading this description, various equivalent modifications to this description by those skilled in the art fall within the scope defined by the claims attached to this application.

[0022] Please combine Figures 1 to 5 As shown, the fluid parameter measuring device with an annular gap involved in this embodiment includes a base 1, a core column 2, a swing block 3, an adjustment assembly and a measuring cylinder 4. The main body of the base 1 is a C-shaped structure with an upper opening, and a crossbeam 1a is arranged at the upper opening position to install the adjustment screw 5 in the adjustment assembly. The C-shaped base 1 has two side walls, and a core column 2 is fixed between the side walls, and the two ends of the core column 2 are fixedly connected to the side walls on both sides.

[0023] A rotating shaft 6 is also fixed between the two side walls of the base 1, and the rotating shaft 6 is arranged parallel to the axis of the core column 2. The swing block 3 is made of transparent acrylic, and the rear part of the swing block 3 is sleeved on the rotating shaft 6 so that the swing block 3 can swing around the rotating shaft. A horizontal through hole 3a is opened in the front part of the swing block 3, and the core column 2 is inserted into the through hole. When installing, the swing block 3 is first installed on the rotating shaft 6, and then the through hole of the swing block 2 is made to correspond to the core column installation hole on the side wall of the base 1, and then the core column 2 is inserted to fix the core column 2 to the side wall.

[0024] The middle section of the stem 2 is the annular gap section 2a, and the outer diameter of the annular gap section 2a is smaller than the diameter of the through hole on the swing block 3, so that after the stem 2 penetrates the through hole, an annular gap 7 is formed between the surface of the annular gap section 2a and the inner wall of the through hole 3a. The stem 2 is provided with a liquid inlet annular groove 2b and a liquid outlet annular groove 2c at both ends of the annular gap section 2a, and a liquid inlet channel 2d and a liquid outlet channel 2e are provided in the center of both ends of the stem 2. A plurality of liquid inlets 2f are evenly distributed along the circumference of the liquid inlet annular groove 2b, and these liquid inlets 2f connect the liquid inlet channel 2d with the liquid inlet annular groove 2b. A plurality of liquid outlets 2g are evenly distributed along the circumference of the liquid outlet annular groove 2c, and these liquid outlets 2g connect the liquid outlet channel 2e with the liquid outlet annular groove 2c. The inlet of the liquid inlet channel 2d formed at one end of the stem 2 is connected with a quick-connect plug 14, which is convenient for injecting fluid into the stem 2. At the other end of the core column 2, there is an outlet formed by the liquid outlet channel 2e. A measuring cylinder 4 is fixedly mounted on the side wall of the base 1. In this embodiment, the measuring cylinder 4 is made of a transparent acrylic block. The measuring cylinder 4 is fixed to the side wall of the base 1 by bolts. At the same time, the outlet of the liquid outlet channel 2e is set on the side wall of the measuring cylinder 4. The fluid flowing out of the liquid outlet channel 2e directly enters the measuring cylinder 4 to measure the fluid outflow. A discharge port 9 with an emptying valve 8 is set at the bottom of the measuring cylinder 4 to facilitate the discharge of the fluid in the measuring cylinder 4 after the experiment is completed.

[0025] In addition to the liquid inlet annular groove 2b and the liquid outlet annular groove 2c, two annular grooves are provided at both ends of the core column 2. A spiropyran polyurethane mechanochromic ring 10 is installed in the annular groove near the end of the core column 2. The spiropyran polyurethane material is a material that can produce color changes according to the magnitude of the force. An elastic sealing ring 11 is installed in the annular groove near the annular gap section 2a to form a seal between the two ends of the core column 2 and the through hole 3a. In this way, the fluid entering from the liquid inlet channel 2d passes through the liquid inlet 2f, the liquid inlet annular groove 2b, the annular gap, the liquid outlet annular groove 2c, the liquid outlet 2g in sequence, and then is discharged into the measuring cylinder 4 from the liquid outlet channel 2e.

[0026] After the core column 2 and the swing block 3 are installed, the core column 2 and the through hole 3a are basically coaxial. In order to facilitate the experiment to change the positional relationship between the two, an adjustment component is set to push the swing block 3 to rotate to change the concentricity between the surface of the core column 2 and the inner wall of the through hole 3a. In this embodiment, the adjustment component includes an adjustment screw 5 and an elastic member. The elastic member is a plurality of springs 12, which are arranged at the C-shaped bottom of the base and press against the lower side of the front of the swing block 3. The adjustment screw 5 is installed on the crossbeam 1a of the base 1, and the adjustment screw 5 is pressed down on the upper side of the front of the swing block 3. In this way, the front of the swing block 3 is lifted or lowered by turning the adjustment screw 5. A dial gauge 13 is also installed on the crossbeam 1a, and the measuring end of the dial gauge 13 is also pressed down on the upper side of the front of the swing block 3. The dial gauge 13 is used as a distance sensor to measure the movement of the front of the swing block 3. It should be pointed out that in addition to using the dial gauge 13 and the micrometer as a distance sensor, a non-contact distance sensor can also be used for measurement.

[0027] Through the annular gap fluid parameter measuring device of this embodiment, by turning the adjusting screw 5, the relative position of the swing block 3 and the core column 2 can be changed, so that the concentricity of the annular gap 7 is changed to meet the experimental test needs. At the same time, a transparent swing block 3 is used in conjunction with the spiropyran polyurethane mechanochromic ring 10. When the concentricity of the annular gap 7 changes, the spiropyran polyurethane mechanochromic ring 10 changes color due to uneven force, which can more conveniently show the non-concentric state to learners, and is also conducive to observing the flow of fluid in the annular gap 7.

Claims

1. A device for measuring parameters of an annular gap fluid, characterized in that: The invention comprises a base, a core column and a swing block, wherein the base is provided with two side walls, the two ends of the core column are respectively fixedly connected to the side walls, a rotating shaft is provided between the two side walls, the rotating shaft is parallel to the axis of the core column, the swing block is connected to the base through the rotating shaft, a through hole is provided on the swing block, the core column is passed through the through hole, the core column and the two ends of the through hole are sealed by an elastic sealing ring, an annular gap is formed between the surface of the core column and the inner wall of the through hole, the core column is provided with a liquid inlet channel and a liquid outlet channel, the liquid inlet channel and the liquid outlet channel are respectively connected to the two ends of the annular gap The ends are connected, and the pressure liquid enters the annular gap from the liquid inlet channel and flows out from the liquid outlet channel. The base is provided with an adjusting component, and the adjusting component drives the swing block to rotate to change the concentricity of the surface of the core column and the inner wall of the through hole. The core column is provided with an annular gap section, and the surface of the annular gap section and the inner wall of the through hole form the annular gap. The two ends of the annular gap section are respectively provided with a liquid inlet annular groove and a liquid outlet annular groove, and the circumference of the liquid inlet annular groove is provided with a plurality of liquid inlets connected with the liquid inlet channel, and the circumference of the liquid outlet annular groove is provided with a plurality of liquid outlets connected with the liquid outlet channel.

2. The annular gap fluid parameter measuring device according to claim 1, characterized in that: The adjusting assembly comprises an elastic member and an adjusting screw, wherein the elastic member and the adjusting screw are respectively located on two sides of the swing block, and the elastic force of the elastic member on the swing block is changed when the adjusting screw is rotated.

3. The annular gap fluid parameter measuring device according to claim 1, characterized in that: The base is provided with a distance sensor, and the distance sensor is used to measure the swing distance of the swing block.

4. The annular gap fluid parameter measuring device according to claim 3, characterized in that: The distance sensor is a micrometer or a dial indicator.

5. The annular gap fluid parameter measuring device according to claim 1, characterized in that: A spiropyran polyurethane mechanochromic ring is arranged between the swing block and the core column. The spiropyran polyurethane mechanochromic ring is sleeved on the core column. The swing block is transparent at the position of the spiropyran polyurethane mechanochromic ring.

6. The annular gap fluid parameter measuring device according to claim 1, characterized in that: The liquid inlets are equally distributed in the circumferential direction of the liquid inlet annular groove, and the liquid outlets are equally distributed in the circumferential direction of the liquid outlet annular groove.

7. The annular gap fluid parameter measuring device according to claim 1, characterized in that: The inlet of the liquid inlet channel and the outlet of the liquid outlet channel are arranged at two ends of the core column.

8. The annular gap fluid parameter measuring device according to claim 1, characterized in that: The outlet of the liquid outlet channel is connected with a measuring cylinder.

9. The annular gap fluid parameter measuring device according to claim 8, characterized in that: The measuring cylinder is fixedly connected to the base, and a drain valve is arranged at the bottom of the measuring cylinder.

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