Central sleeve structure of flow measuring sensor

Abstract

The utility model relates to a central sleeve structure of a flow measuring sensor, and belongs to the technical field of acoustics and sensing. According to the technical scheme, the front portion and the rear portion of the flow measurement center sleeve are each of a pincerlike opening structure, each pincerlike opening structure is composed of an arc-shaped left pincerlike body and an arc-shaped right pincerlike body, a pincerlike opening is formed between the arc-shaped left pincerlike body and the arc-shaped right pincerlike body, and horizontally-arranged installation sliding ways are arranged on the inner wall of the arc-shaped left pincerlike body and the inner wall of the arc-shaped right pincerlike body respectively. And the upstream ultrasonic reflector plate and the downstream ultrasonic reflector plate are respectively arranged in the pincerlike opening structures of the front part and the rear part of the flow measurement central sleeve through the mounting slideways. The flow measuring center sleeve has the advantages that the space occupied by the front pipe cavity and the rear pipe cavity of the flow measuring center sleeve in the pipe section body is reduced, pressure loss and fluid disturbance are reduced, the flow measuring center sleeve and the reflector are prevented from shaking in the pipe section body, and the flow measuring precision is improved.

Description

Technical Field

[0001] The utility model relates to a central sleeve structure of a flow measurement sensor, which is used for measuring flowing media, especially an ultrasonic measurement structure for liquids or gases, and belongs to the technical fields of acoustics and sensing technology. Background Technique

[0002] At present, the existing ultrasonic flow sensor structures, especially small-diameter ultrasonic flow sensors, usually measure by means of a beam fluid and a reflector reflecting ultrasonic waves. Common structures include: ① Chinese Patent CN201920093376.X, named "An Ultrasonic Water Metering Module Structure and an Ultrasonic Water Meter", in which the fixing method is that the beam fluid is clamped and fixed to the pipe section body through a snap hook, and the reflector is installed in the reflection groove of the beam fluid, forming a W reflection form as a whole. However, in this form, since the reflector is not directly fixed, it is easy to cause inaccurate measurement due to tolerance problems. ② Chinese Patent CN202010661469.5, named "An Ultrasonic Measurement Structure and Its Assembly Method", a flow measurement central sleeve is arranged in the pipe section body. The flow measurement central sleeve is composed of three parts of an integral structure. The middle part is a flow measurement channel with a smaller inner diameter, and the front and rear parts are pipe cavities with a larger inner diameter. The upstream ultrasonic reflector and the downstream ultrasonic reflector are respectively installed in the pipe cavities of the front and rear parts of the flow measurement central sleeve, forming a U reflection form as a whole; since the pipe cavities of the front and rear parts of the flow measurement central sleeve occupy most of the internal space of the pipe section body, it blocks and disturbs the normal flow measurement, affecting the flow measurement accuracy. In addition, the positioning of the flow measurement central sleeve and the reflector in the pipe section body is unstable, and it is easy to shake after assembly, affecting the flow measurement accuracy. Content of the Utility Model

[0003] The purpose of the utility model is to provide a central sleeve structure of a flow measurement sensor, which reduces the internal space of the pipe section body occupied by the pipe cavities of the front and rear parts of the flow measurement central sleeve, reduces pressure loss and fluid disturbance, avoids shaking of the flow measurement central sleeve and the reflector in the pipe section body, and improves the flow measurement accuracy, so as to solve the above technical problems existing in the background technique.

[0004] The technical solution of the utility model is as follows:

[0005] A central sleeve structure of a flow measurement sensor includes an upstream ultrasonic reflector, a flow measurement central sleeve, and a downstream ultrasonic reflector. Both the front and rear parts of the flow measurement central sleeve are of a clamp-shaped opening structure. The clamp-shaped opening structure is composed of an arc-shaped left clamp body and an arc-shaped right clamp body. There is a clamp-shaped opening between the arc-shaped left clamp body and the arc-shaped right clamp body. Horizontally arranged installation slides are respectively provided on the inner walls of the arc-shaped left clamp body and the arc-shaped right clamp body. The upstream ultrasonic reflector and the downstream ultrasonic reflector are respectively installed in the clamp-shaped opening structures of the front and rear parts of the flow measurement central sleeve through the installation slides.

[0006] Furthermore, upstream and downstream installation slides are respectively arranged on the clamping opening structures of the front and rear parts of the flow measurement central sleeve. The upstream ultrasonic reflector and the downstream ultrasonic reflector are respectively installed in the front and rear clamping opening structures of the flow measurement central sleeve through the upstream and downstream installation slides.

[0007] Furthermore, upstream reflector fixing holes and downstream reflector fixing holes are respectively provided on the arc-shaped left clamping body and the arc-shaped right clamping body of the front and rear clamping opening structures of the flow measurement central sleeve. The upstream reflector fixing holes and the downstream reflector fixing holes are respectively arranged on the upstream and downstream installation slides; upstream reflector fixing wings and downstream reflector fixing wings are respectively provided on the frames of the upstream ultrasonic reflector and the downstream ultrasonic reflector. When the upstream ultrasonic reflector and the downstream ultrasonic reflector are respectively installed in place along the upstream and downstream installation slides, the upstream reflector fixing wings and the downstream reflector fixing wings are respectively clamped in the upstream reflector fixing holes and the downstream reflector fixing holes.

[0008] Furthermore, an interference fixing point of the reflector is provided at the outer end of the upstream ultrasonic reflector. After the upstream ultrasonic reflector, the flow measurement central sleeve, and the downstream ultrasonic reflector are integrated, they need to be installed into the pipe section body. The interference fixing point of the reflector is in interference contact with the inner wall of the pipe section body for positioning.

[0009] Furthermore, two O-ring installation grooves are provided in the middle part of the flow measurement central sleeve. O-ring seals are arranged in the O-ring installation grooves. The middle part of the flow measurement central sleeve is positioned and sealed with the pipe section body through the O-ring seals.

[0010] Furthermore, the flow measurement channel in the middle part of the flow measurement central sleeve has a circular flow measurement cross-section, and a reduced-diameter structure is provided in the flow measurement channel to improve the stability of the flow pattern.

[0011] Furthermore, the utility model adopts a U-shaped measurement structure.

[0012] In the utility model, by changing the front and rear parts of the flow measurement central sleeve into clamping opening structures, the internal space of the pipe section body occupied by the front and rear pipe cavities of the flow measurement central sleeve is reduced, and the pressure loss and fluid disturbance are reduced; by the cooperation of the upstream reflector fixing wings and the downstream reflector fixing wings with the upstream reflector fixing holes and the downstream reflector fixing holes respectively, the stability and accuracy of the reflector are improved, and the assembly difficulty is reduced; two O-ring installation grooves provided in the middle part of the flow measurement central sleeve strengthen the sealing performance and greatly improve the measurement accuracy.

[0013] The beneficial effects of the utility model: The internal space of the pipe section body occupied by the front and rear pipe cavities of the flow measurement central sleeve is reduced, the pressure loss and fluid disturbance are reduced, the shaking of the flow measurement central sleeve and the reflector in the pipe section body is avoided, and the flow measurement accuracy is improved. Description of the Drawings

[0014] Figure 1 is the exploded axonometric view of the embodiment of the present utility model;

[0015] Figure 2 is the cross-sectional view of the embodiment of the present utility model;

[0016] Figure 3 is the exploded front view of the embodiment of the present utility model;

[0017] Figure 4 is the axonometric view of the embodiment of the present utility model;

[0018] Figure 5 Side view of the embodiment of the present utility model;

[0019] In the figure: upstream ultrasonic reflector 1, flow measurement center sleeve 2, downstream ultrasonic reflector 3, upstream installation slideway 4, downstream installation slideway 5, upstream reflector fixing hole 6, downstream reflector fixing hole 7, O-ring installation groove 8, upstream reflector fixing wing 9, downstream reflector fixing wing 10, reflector interference fixing point 11, arc-shaped left clamp body 12, arc-shaped right clamp body 13, clamp-shaped opening 14, frame 15, reflector lens 16. Detailed Embodiment

[0020] The following further describes the present utility model through embodiments in conjunction with the drawings.

[0021] Refer to the attached Figures 1-5 , this embodiment provides a flow measurement sensor center sleeve structure, which includes an upstream ultrasonic reflector 1, a flow measurement center sleeve 2, and a downstream ultrasonic reflector 3. Both the front and rear parts of the flow measurement center sleeve 2 are of a clamp-shaped opening structure, and the clamp-shaped opening structure is composed of an arc-shaped left clamp body 12 and an arc-shaped right clamp body 13. There is a clamp-shaped opening 14 between the arc-shaped left clamp body 12 and the arc-shaped right clamp body 13. Horizontal installation slideways are respectively arranged on the inner walls of the arc-shaped left clamp body 12 and the arc-shaped right clamp body 13. The upstream ultrasonic reflector 1 and the downstream ultrasonic reflector 3 are respectively installed in the clamp-shaped opening structures of the front and rear parts of the flow measurement center sleeve through the installation slideways.

[0022] The upstream ultrasonic reflector 1 and the downstream ultrasonic reflector 3 are of an integrally stamped and formed structure, which includes a frame 15 and a reflector lens 16. After the frame 15 and the reflector lens 16 are stamped and formed, the reflector lens 16 parallel to the frame is bent to a set inclination angle.

[0023] The flow measurement center sleeve 2 is integrally injection molded, and the upstream ultrasonic reflector 1 and the downstream ultrasonic reflector 3 are assembled with the flow measurement center sleeve 2 into one body.

[0024] The upstream installation slideway 4 and the downstream installation slideway 5 are respectively arranged on the front and rear parts of the clamp-shaped opening structure of the flow measurement central sleeve 2. The upstream ultrasonic reflector 1 and the downstream ultrasonic reflector 3 are respectively installed in the front and rear clamp-shaped opening structures of the flow measurement central sleeve 2 through the upstream installation slideway 4 and the downstream installation slideway 5.

[0025] The upstream reflector fixing holes 6 and the downstream reflector fixing holes 7 are respectively arranged on the arc-shaped left clamp body 12 and the arc-shaped right clamp body 13 of the front and rear clamp-shaped opening structures of the flow measurement central sleeve 2. The upstream reflector fixing holes 6 and the downstream reflector fixing holes 7 are respectively arranged on the upstream installation slideway 4 and the downstream installation slideway 5; the upstream reflector fixing wings 9 and the downstream reflector fixing wings 10 are respectively arranged on the frames of the upstream ultrasonic reflector 1 and the downstream ultrasonic reflector 3. When the upstream ultrasonic reflector 1 and the downstream ultrasonic reflector 3 are respectively installed in place along the upstream installation slideway 4 and the downstream installation slideway 5, the upstream reflector fixing wings 9 and the downstream reflector fixing wings 10 are respectively clamped in the upstream reflector fixing holes 6 and the downstream reflector fixing holes 7.

[0026] The outer end of the upstream ultrasonic reflector 1 is provided with an interference fixing point 11 for the reflector. After the upstream ultrasonic reflector 1, the flow measurement central sleeve 2 and the downstream ultrasonic reflector 3 are integrated, they need to be installed into the pipe section body. The interference fixing point 11 for the reflector is in interference contact with the inner wall of the pipe section body for positioning.

[0027] Two O-ring installation grooves 8 are arranged in the middle part of the flow measurement central sleeve 2. O-ring seals are arranged in the O-ring installation grooves 8. The middle part of the flow measurement central sleeve 2 is positioned and sealed with the pipe section body through the O-ring seals.

[0028] The flow measurement channel in the middle part of the flow measurement central sleeve 2 has a circular flow measurement cross-section, and a reduced-diameter structure A is arranged in the flow measurement channel to improve the stability of the flow pattern.

[0029] The utility model has a U-shaped measurement structure.

[0030] Assembly process: Both the front and rear parts of the flow measurement center sleeve 2 are of a clamp-shaped opening structure. The upstream ultrasonic reflector 1 and the downstream ultrasonic reflector 3 are respectively installed in the front and rear clamp-shaped opening structures of the flow measurement center sleeve 2 through the upstream installation slideway 4 and the downstream installation slideway 5. When the upstream ultrasonic reflector 1 and the downstream ultrasonic reflector 3 are respectively installed in place along the upstream installation slideway 4 and the downstream installation slideway 5, the upstream reflector fixing wing 9 and the downstream reflector fixing wing 10 are respectively clamped in the upstream reflector fixing hole 6 and the downstream reflector fixing hole 7. After the upstream ultrasonic reflector 1, the flow measurement center sleeve 2 and the downstream ultrasonic reflector 3 are integrated, they are installed into the pipe section body, and the interference fixing point 11 of the reflector is in interference contact with the inner wall of the pipe section body for positioning. The middle part of the flow measurement center sleeve 2 is positioned and sealed with the pipe section body through two O-ring seals.

[0031] In the utility model, by changing the front and rear parts of the flow measurement center sleeve 2 into a clamp-shaped opening structure, the internal space of the pipe section body occupied by the lumen of the front and rear parts of the flow measurement center sleeve is reduced, and the pressure loss and fluid disturbance are reduced. By the cooperation of the upstream reflector fixing wing 9 and the downstream reflector fixing wing 10 with the upstream reflector fixing hole 6 and the downstream reflector fixing hole 7 respectively, the stability and accuracy of the reflector are improved, and the assembly difficulty is reduced. Two O-ring installation grooves 8 are provided in the middle part of the flow measurement center sleeve 2, which enhances the sealing performance and greatly improves the measurement accuracy.

Claims

1. A central sleeve structure of a flow measurement sensor, characterized in that: It includes an upstream ultrasonic reflector (1), a flow measurement central sleeve (2) and a downstream ultrasonic reflector (3). The front and rear parts of the flow measurement central sleeve (2) are both of a clamp-shaped opening structure. The clamp-shaped opening structure is composed of an arc-shaped left clamp body (12) and an arc-shaped right clamp body (13). Between the arc-shaped left clamp body (12) and the arc-shaped right clamp body (13) is a clamp-shaped opening (14). Horizontal installation slides are respectively arranged on the inner walls of the arc-shaped left clamp body (12) and the arc-shaped right clamp body (13). The upstream ultrasonic reflector (1) and the downstream ultrasonic reflector (3) are respectively installed in the clamp-shaped opening structures of the front and rear parts of the flow measurement central sleeve through the installation slides.

2. The central sleeve structure of a flow measurement sensor according to claim 1, characterized in that: Upstream reflector fixing holes (6) and downstream reflector fixing holes (7) are respectively arranged on the arc-shaped left clamp body (12) and the arc-shaped right clamp body (13) of the front and rear clamp-shaped opening structures of the flow measurement central sleeve (2). The upstream reflector fixing holes (6) and the downstream reflector fixing holes (7) are respectively arranged on the upstream installation slide (4) and the downstream installation slide (5). Upstream reflector fixing wings (9) and downstream reflector fixing wings (10) are respectively arranged on the frames of the upstream ultrasonic reflector (1) and the downstream ultrasonic reflector (3). When the upstream ultrasonic reflector (1) and the downstream ultrasonic reflector (3) are respectively installed in place along the upstream installation slide (4) and the downstream installation slide (5), the upstream reflector fixing wings (9) and the downstream reflector fixing wings (10) are respectively clamped in the upstream reflector fixing holes (6) and the downstream reflector fixing holes (7).

3. The central sleeve structure of a flow measurement sensor according to claim 2, characterized in that: An interference fixing point (11) of the reflector is arranged at the outer end of the upstream ultrasonic reflector (1). After the upstream ultrasonic reflector (1), the flow measurement central sleeve (2) and the downstream ultrasonic reflector (3) are combined into one body, they need to be installed into the pipe section body. The interference fixing point (11) of the reflector is in interference contact with the inner wall of the pipe section body for positioning.

4. A central sleeve structure of a flow measurement sensor according to claim 3, characterized in that: Two O-ring installation grooves (8) are arranged at the front and rear of the middle part of the flow measurement central sleeve (2). O-ring seals are arranged in the O-ring installation grooves (8). The middle part of the flow measurement central sleeve (2) is positioned and sealed with the pipe section body through the O-ring seals.

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