Buffering air inlet pipe connector and differential pressure liquid level meter

Abstract

The utility model relates to the technical field of liquid level measurement, and provides a buffer air inlet pipe connector which comprises a connector body, air channels are formed in the connector body, one end of the connector body is arranged to be an air outlet end, the other end of the connector body is arranged to be an air inlet end, throttling pieces are arranged in the air channels of the air outlet end and the air inlet end, and the throttling pieces are hollow. A buffering hole is formed in the bottom plate, the outer wall of the throttling piece is connected with the hole wall of the air channel, the opening end of the throttling piece is located at the outer end of the air channel and used for air inflow or air outflow, and the buffering hole is communicated with the air channel. According to the buffering air inlet pipe connector, through two-stage buffering, the situation that the diaphragm is deformed and damaged due to direct impact on the corrugated pipe diaphragm is effectively avoided, the effect of remarkably reducing the shaking amplitude of the pointer is achieved, the detection error is reduced, and a worker can read conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid level measurement, in particular to a buffer air intake pipe connector and a differential pressure liquid level gauge. Background Art

[0002] A differential pressure level gauge is an instrument that measures the pressure difference at different heights within a container to obtain the liquid level of the medium within the container. In actual use, two pressure points are usually installed at the top and bottom of the container. The upper pressure point (above the liquid surface) is connected to the low-pressure chamber through the air inlet pipe joint to measure the gas phase pressure, and the lower pressure point is connected to the high-pressure chamber to measure the liquid phase pressure. When the liquid level changes, the difference between the high and low pressures changes. This pressure difference is proportional to the liquid level, and the liquid level can be calculated by measuring the pressure difference. The double-bellows differential pressure level gauge has bellows installed in both the high-pressure and low-pressure chambers. Driven by the pressure difference between the high-pressure and low-pressure chambers, the bellows in the high-pressure chamber shorten and push the center rod to move horizontally toward the low-pressure chamber, causing the bellows in the low-pressure chamber to extend. At the same time, the center rod drives the pointer to rotate to display the degree. However, the gas in the existing double-bellows differential pressure level gauge directly impacts the bellows after entering the air inlet pipe joint. Especially when the container is filled with liquid or releasing liquid, the gas flow rate is too fast and the pressure is unstable, which often causes the pointer to shake left and right greatly and frequently, making it difficult to display normal readings. It is also easy to cause the bellows diaphragm to deform and damage. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the present utility model is to provide a buffered air intake pipe connector and a differential pressure level gauge, which can improve the stability of the pointer, avoid frequent shaking of the pointer, facilitate reading by staff, and protect the bellows diaphragm from deformation and damage.

[0004] On the one hand, the utility model provides a buffered air intake pipe connector, including a connector body, an air duct is opened inside the connector body, one end of the connector body is set as the air outlet end, and the other end is set as the air inlet end, and throttling parts are set in the air ducts of the air outlet end and the air inlet end. The throttling part is hollow inside, a bottom plate is set at one end of the throttling part and an opening is set at the other end, a buffer hole is opened on the bottom plate, the outer wall of the throttling part is connected to the hole wall of the air duct, the open end of the throttling part is located at the outer end of the air duct for air intake or outlet, and the buffer hole is connected to the air duct.

[0005] Furthermore, the outer wall of the throttling element is threadedly connected to the hole wall of the air passage.

[0006] Furthermore, an ear plate is provided on the outer edge of the opening end of the throttling member, and an expanded groove for accommodating the ear plate is provided in the air passage.

[0007] Furthermore, it also includes a sealing gasket, which is sleeved on the outer wall of the throttling component and is accommodated in the expansion groove and located on the inner side of the ear plate.

[0008] Furthermore, an inner hexagonal groove is provided on the inner wall of the throttling member.

[0009] Furthermore, the diameter of the airway is 2-6 mm, and the diameter of the buffer hole is 0.15-0.25 mm.

[0010] On the other hand, the utility model also provides a differential pressure level gauge, including a high-pressure chamber and a low-pressure chamber, the high-pressure chamber is provided with a liquid phase connection hole, and the low-pressure chamber is provided with a gas phase connection hole. It also includes the aforementioned buffer air inlet pipe connector, and the outer wall of the air outlet end of the joint body of the buffer air inlet pipe connector is threadedly connected to the hole wall of the gas phase connection hole.

[0011] In summary, the technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

[0012] The utility model provides throttling parts at the air ducts of the air outlet end and the air inlet end of the air inlet pipe connector. During actual use, gas enters the air inlet end. Since the buffer hole of the throttling part at the air inlet end is significantly smaller than the air duct, the instantaneous impact force of the airflow can be effectively reduced, so that the airflow slowly enters the air duct and then passes through the buffer hole of the throttling part at the air outlet end, thereby further reducing the impact force of the airflow. Through two-stage buffering, direct impact on the bellows diaphragm to cause deformation and damage to the diaphragm is effectively avoided, and the pointer shaking amplitude is significantly reduced, thereby reducing detection errors and facilitating readings by staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of the buffer intake pipe connector according to an embodiment of the present utility model;

[0014] Figure 2 This is a cross-sectional view of a buffer intake pipe connector according to an embodiment of the present invention;

[0015] Figure 3 This is a schematic diagram of the overall structure of the differential pressure level gauge according to an embodiment of the present utility model.

[0016] Icon: 1-connector body, 11-air duct, 12-air outlet, 13-air inlet, 14-expansion groove, 2-throttling piece, 21-base plate, 22-buffer hole, 23-ear plate, 31-high-pressure chamber, 32-low-pressure chamber. DETAILED DESCRIPTION

[0017] This embodiment provides a differential pressure level gauge, such as Figure 1As shown, the differential pressure level gauge includes a high-pressure chamber 31 and a low-pressure chamber 32. The high-pressure chamber 31 is provided with a liquid phase connection hole, and the low-pressure chamber 32 is provided with a gas phase connection hole. The outer wall of the air outlet end 12 of the joint body 1 of the buffer air inlet pipe connector is threadedly connected to the hole wall of the gas phase connection hole. The utility model differential pressure level gauge double bellows differential pressure level gauge has bellows in the high pressure chamber 31 and the low pressure chamber 32. When in use, the high pressure chamber 31 and the low pressure chamber 32 are connected to the container respectively. The pressure change in the inner cavity of the high pressure chamber 31 is the same as the pressure change in the liquid phase of the liquid storage container, and the pressure change in the inner cavity of the low pressure chamber 32 is the same as the pressure change in the gas phase of the liquid storage container. Driven by the pressure difference between the inner cavities of the high and low pressure chambers, the bellows in the high pressure chamber 31 shortens and pushes the center rod to move horizontally toward the low pressure chamber 32, so that the bellows in the low pressure chamber 32 extend. At the same time, the center rod drives the pointer to rotate to display the degree. The structure of this part can be referred to the penultimate paragraph and the attached specification of Chinese utility model patent ZL02276185.3. Figure 1 .

[0018] like Figure 2 、 Figure 3 As shown, specifically, the buffer air inlet pipe connector of the differential pressure level gauge includes a connector body 1, an air duct 11 is opened inside the connector body 1, one end of the connector body 1 is set as the air outlet end 12, and the other end is set as the air inlet end 13, and a throttling member 2 is set in the air duct 11 of the air outlet end 12 and the air inlet end 13. The throttling member 2 is hollow inside, and a bottom plate 21 is set at one end of the throttling member 2 and an opening is set at the other end. A buffer hole 22 is opened in the bottom plate 21, and the outer wall of the throttling member 2 is connected to the hole wall of the air duct 11. The open end of the throttling member 2 is located at the outer end of the air duct 11 for air intake or outlet, and the buffer hole 22 is connected to the air duct 11. The diameter of the air duct 11 is 2-6 mm, and the diameter of the buffer hole 22 is 0.15-0.25 mm. In actual use, the low-pressure tank 32 of the differential pressure level gauge is connected to the gas phase part of the liquid storage container through the buffer inlet pipe joint, and the gas in the liquid storage container enters the inlet end 13. Since the buffer hole 22 of the throttle member 2 at the inlet end 13 is much smaller than the airway 11, it can effectively reduce the instantaneous impact force of the airflow, so that the airflow slowly enters the airway 11, and then passes through the buffer hole 22 of the throttle member 2 at the outlet end 12, further reducing the impact force of the airflow. Through two-stage buffering, direct impact on the bellows diaphragm to cause deformation and damage to the diaphragm is effectively avoided, and the amplitude of pointer shaking is significantly reduced, making it convenient for staff to read.

[0019] In order to facilitate the installation of the throttle member 2, an external thread is provided on the outer wall of the throttle member 2, an internal thread is provided on the hole wall of the airway 11, and an ear plate 23 is provided on the outer edge of the open end of the throttle member 2. The airway 11 is provided with a flared groove 14 for accommodating the ear plate 23. A sealing gasket is sleeved on the outer wall of the throttle member 2, the sealing gasket is accommodated in the flared groove 14 and is located on the inner side of the ear plate 23. The inner wall of the throttle member 2 is provided with an inner hexagonal groove. The hexagonal screw tool is inserted into the interior of the throttle member 2 and clamped with its inner wall. The throttle member 2 can be screwed into the airway 11 by rotating the hexagonal screw. The flared groove 14 of the airway 11 cooperates with the ear plate 23 of the throttle member 2, which is convenient for installation and positioning. At the same time, combined with the sealing gasket, it can play a good sealing role to prevent gas from escaping from between the throttle member 2 and the hole wall of the airway 11, further ensuring the stability of the gas entering the low-pressure chamber 32 and reducing pointer shaking.

[0020] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A buffer air inlet pipe connector, comprising a connector body (1), an air passage (11) being provided inside the connector body (1), one end of the connector body (1) being configured as an air outlet (12), and the other end being configured as an air inlet (13), characterized in that: A throttling member (2) is provided in the air passage (11) at both the air outlet end (12) and the air inlet end (13). The throttling member (2) is hollow inside. A bottom plate (21) is provided at one end of the throttling member (2) and an opening is provided at the other end. A buffer hole (22) is provided in the bottom plate (21). The outer wall of the throttling member (2) is connected to the hole wall of the air passage (11). The open end of the throttling member (2) is located at the outer end of the air passage (11) for air intake or air outlet. The buffer hole (22) is communicated with the air passage (11).

2. The buffer intake pipe connector according to claim 1, characterized in that: The outer wall of the throttling member (2) is threadedly connected to the hole wall of the air passage (11).

3. The buffer intake pipe connector according to claim 2, characterized in that: An ear plate (23) is provided at the outer edge of the opening end of the throttling member (2), and an expanding groove (14) for accommodating the ear plate (23) is provided on the air passage (11).

4. The buffer intake pipe connector according to claim 3, characterized in that: It also includes a sealing gasket (3), which is sleeved on the outer wall of the throttling member (2). The sealing gasket (3) is accommodated in the expansion groove (14) and is located on the inner side of the ear plate (23).

5. The buffer intake pipe connector according to claim 1, characterized in that: The inner wall of the throttling member (2) is provided with an inner hexagonal groove.

6. The buffer intake pipe connector according to claim 1, characterized in that: The diameter of the air channel (11) is 2-6 mm, and the diameter of the buffer hole (22) is 0.15-0.25 mm.

7. A differential pressure level gauge, comprising a high-pressure chamber (31) and a low-pressure chamber (32), wherein the high-pressure chamber (31) is provided with a liquid phase connection hole, and the low-pressure chamber (32) is provided with a gas phase connection hole, characterized in that: It also comprises a buffer air intake pipe connector as claimed in any one of claims 1 to 6, wherein the air outlet end (12) of the connector body (1) of the buffer air intake pipe connector is threadedly connected to the gas phase connection hole.

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