Threaded plug with filtering structure, pressure guiding pipe and measuring device

Abstract

The utility model discloses a threaded plug with a filtering structure, a pressure guiding pipe and a measuring device. The threaded plug comprises a plug body, and an external thread is arranged on a rod body of the plug body; an inner hole is formed in the rod body and communicated with a plurality of pressure guiding holes formed in the circumferential direction of the rod body. A filter element layer is arranged in the inner hole and filters gas entering the inner hole, and the pressure guide hole is located in the rear portion of the inner hole. According to the pressure guiding pipe, a pressure guiding hole is formed in a pressure guiding pipe body, and a threaded plug with a filtering structure is arranged at one end of the pressure guiding hole. The threaded plug disclosed by the utility model can filter or separate moisture or impurities in gas and prevent the moisture or impurities from being gathered in the pressure guide pipe, so that blockage cannot be formed after long-term use; moisture can be prevented from corroding components such as the sensor and influencing the measurement precision; and the situation that related parameters cannot be measured in time or the measurement precision is greatly reduced due to blockage of impurities in the pipeline is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring devices for measuring gas parameters, in particular to a threaded plug with a filtering structure, a pressure-guiding pipe with the threaded plug, and a measuring device. Background Art

[0002] Measuring devices for measuring gas parameters usually measure multiple parameters, such as flow rate, flow velocity, pressure (flow rate can also be calculated by pressure difference), temperature, etc. Commonly used differential pressure transmitters, micro differential pressure sensors, etc., usually have pressure pipes arranged in the gas transmission pipeline. Pressure pipes are arranged on the front and back sides or on the left and right sides of the pressure pipe. The gas (fluid) pressure at the corresponding sampling position of the pressure pipe is input into the measuring device through the pipeline of the pressure pipe to obtain the gas pressure or other parameters, and then the gas (fluid) flow rate, flow velocity, pressure and other parameters can be calculated.

[0003] In the prior art, for gas (fluid) pipelines, such as pressure-conducting pipes, etc., in order to meet the need for processing the internal pipelines, a processing opening is usually provided on the surface of the pipeline, and the processing opening is concentrically arranged with the pipeline inside it. After processing according to the process, a threaded plug (screw plug) is used to seal the pipeline to ensure the airtightness of the pipeline; however, the threaded plug of the prior art usually only has a sealing effect, but not a filtering effect, and cannot filter or separate moisture or impurities in the gas (fluid), and moisture or impurities are easy to accumulate in the pressure-conducting pipe, and moisture corrodes the pipeline or sensor, etc., affecting the measurement accuracy; and the accumulation of impurities in the pressure-conducting pipe may affect the flow of gas (fluid) in the pipeline, and even form a blockage, resulting in the inability to measure relevant parameters in time, or greatly reducing the measurement accuracy.

[0004] During the measurement process of the measuring device, when the gas flows in the pressure-guiding device, the gas contains more or less moisture and various impurities, and the moisture or impurities are easy to accumulate in the pressure-guiding pipe. The moisture corrodes the pipeline or sensor, etc., affecting the measurement accuracy; and the impurities accumulate in the pressure-guiding pipe, and the impurities enter the micro-differential pressure sensor, resulting in inaccurate measurement accuracy or damage to the differential pressure sensor, and ultimately the relevant parameters cannot be measured in time, or the measurement accuracy is greatly reduced, and the reliability of the measurement data is reduced. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide a threaded plug and a pressure-drawing device with a filtering structure, so as to separate moisture or impurities in the gas, prevent moisture from corroding components such as pipelines or sensors, prevent impurities from gathering and forming blockages, ensure reliable and stable measurement, and also ensure measurement accuracy.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A threaded plug with a filtering structure comprises a plug body, and an external thread is arranged on the rod body of the plug body; it is characterized in that an inner hole is arranged inside the rod body, and the inner hole is connected with a plurality of pressure-inducing holes arranged along the circumference of the rod body; a filter core layer is arranged in the inner hole, and the filter core layer filters the gas entering the inner hole and flows out from the pressure-inducing holes located at the rear of the inner hole.

[0008] Furthermore, an annular locking ring with an inner hole is arranged in the inner hole, and the locking ring rotates by cooperating with the internal thread corresponding to the inner hole through the external thread and the internal thread corresponding to the inner hole, so that the filter core layer is arranged in the inner hole; or the locking ring is rotatably arranged in the inner hole through the cooperating boss and groove structure.

[0009] Furthermore, the filter core layer comprises a rubber ring, a water-proof and breathable membrane layer and a filter screen arranged in sequence, forming three overlapping filter core layers.

[0010] Furthermore, an annular embedding groove is arranged on the inner wall of the inner hole, the rubber ring is fitted into the annular embedding groove, and the locking ring is pressed on the filter net.

[0011] Furthermore, a concave operating groove is provided on the surface of the locking ring, and the locking ring is driven to rotate in the inner hole through the operating groove during use.

[0012] Furthermore, the outer diameter of the rod body in the area where the pressure-inducing hole is located is reduced.

[0013] A pressure-guiding tube comprises a pressure-guiding tube body, characterized in that: a drainage hole is arranged in the pressure-guiding tube body, a threaded plug with a filtering structure as described above is arranged at one end of the drainage hole, the plug body is threadedly connected to the pressure-guiding tube body through the cooperation of the external thread arranged on the rod body and the threaded hole of the drainage hole to form a sealing structure; a plurality of gas outlets are arranged on the pressure-guiding tube body, and the gas outlets are arranged corresponding to the pressure-guiding holes.

[0014] A measuring device includes a pressure-guiding tube, characterized in that the pressure-guiding tube is as described above.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] The threaded plug with a filtering structure of the utility model can filter or separate moisture or impurities in the gas, prevent the impurities from accumulating in the pressure-leading pipe, and will not form blockage during long-term use, thereby avoiding the failure to measure relevant parameters in time or a significant reduction in measurement accuracy.

[0017] It can prevent moisture from corroding sensors and other components, affecting measurement accuracy; it can prevent impurities from forming blockages in the pipeline, resulting in the inability to measure relevant parameters in a timely manner, or significantly reducing measurement accuracy.

[0018] The pressure-guiding pipe of the utility model adopts a threaded plug with a filtering structure, which can filter or separate moisture or impurities in the gas. Firstly, it can have a strong protective effect on the sensor to prevent moisture or impurities from corroding important components such as the sensor. Secondly, it can reduce or eliminate the accumulation of impurities in the pipeline, and will not cause blockage during long-term use.

[0019] The measuring device of the utility model adopts a pressure-inducing pipe, in which a threaded plug with a filtering structure is arranged.

[0020] It can filter or separate moisture or impurities in the gas. Firstly, it can provide strong protection for the sensor of the measuring device to prevent moisture or impurities from corroding important components such as the sensor. Secondly, it can reduce or eliminate the accumulation of impurities in the pipeline, and will not cause blockage during long-term use, thus extending the service life of the measuring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the threaded plug with a filtering structure of the utility model;

[0022] Figure 2 is a cross-sectional view of the locking ring (part 7);

[0023] Figure 3 for Figure 2 Right view of;

[0024] Figure 4 This is a schematic diagram of the structure of the pressure-guiding tube of the utility model.

[0025] In the figure: 1-plug body, 2-rod body, 3-external thread, 4-inner hole, 5-pressure-introducing hole, 6-filter core layer, 7-locking ring, 8-rubber ring, 9-waterproof and breathable membrane layer, 10-filter screen, 11-annular groove, 12-operating groove, 20-pressure-introducing pipe, 21-drainage hole, 22-gas outlet. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0027] It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In the description of the utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "back" and the like is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invention product is usually placed when used, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example

[0028] This example: See Figure 1 , 2 3. A threaded plug with a filtering structure comprises a plug body 1. An external thread 3 is arranged on a rod body 2 of the plug body 1. When in use, the plug body 1 is threadedly connected to an inner hole to be blocked by cooperating with the external thread 3 and the threaded hole to form a blocking structure.

[0029] The threaded plug with a filtering structure of the utility model is provided with an inner hole 4 inside the rod body 2, the inner hole 4 is connected with a plurality of pressure-inducing holes 5 arranged along the circumference of the rod body 2, the pressure-inducing holes 5 are connected with the sensor of the measuring device to form a gas channel, and a filter core layer 6 is provided in the inner hole 4, the filter core layer 6 allows the gas to pass through and enter the pressure-inducing holes 5 after filtering and then flow out, and has a blocking effect on moisture and impurities in the gas, preventing moisture and impurities from entering the pressure-inducing holes 5 through the filter core layer 6; during actual installation, in most cases the threaded plug is still arranged transversely (horizontally), and its inner hole 4 is also arranged transversely (horizontally), the front end (inlet end) of the inner hole 4 is in contact with the gas, the pressure-inducing holes 5 are located at the rear of the inner hole 4, the filter core layer 6 filters the gas entering the inner hole 4, and the gas flows out from the pressure-inducing holes 5 located at the rear of the inner hole 4.

[0030] In order to compress or fix the filter core layer 6 of the utility model, a ring-shaped locking ring 7 with an inner hole is set at the front end (inlet end) in the inner hole 4. The locking ring 7 can be spirally rotated in the inner hole 4 through the cooperation of the external thread and the internal thread corresponding to the inner hole 4, so as to set (compact) the filter core layer 6 in the inner hole 4. Alternatively, the locking ring 7 is rotatably set in the inner hole 4 through the boss and groove structure provided in cooperation, that is, the boss is provided in the inner hole 4 along the circumferential direction, and the gap is left between the adjacent bosses to form a groove, and the convex block provided on the outer edge of the locking ring 7 is inserted from between the grooves, and is limited by rotating and fitting under the boss. As a further improvement, the filter core layer 6 of the utility model includes a rubber ring 8, a water-proof and breathable membrane layer 9 and a filter screen 10 arranged in sequence, forming a three-layer overlapping filter core layer 6; when specifically assembling and connecting, an annular embedding groove 11 is provided on the inner wall of the inner hole 4, the rubber ring 8 is fitted into the annular embedding groove 11, and the locking ring 7 is pressed on the filter screen 10. The rubber ring 8 can be a rubber ring or an O-ring with a certain elasticity; the water-proof and breathable membrane layer 9 can allow gas to pass through, and has a separation and barrier effect on moisture in the gas. The existing water-proof and breathable membrane can be used; the filter mesh 10 is a mesh structure, which allows gas to pass through while blocking impurities or dust in the gas. Powder metallurgy parts with suitable air permeability can be used, which can filter dust particles with smaller diameters.

[0031] In order to allow the locking ring 7 to rotate in the inner hole 4, a concave operating groove 12 is provided on the surface of the locking ring 7, which serves as a fulcrum for a rod (such as a screwdriver) to rotate the locking ring 7 when in use. The front end of the rod is inserted into the operating groove 12, and the rear end is rotated with force to drive the locking ring 7 to rotate in the inner hole 4.

[0032] In order to ensure that the pressure-introducing hole 5 is connected with the sensor of the measuring device and form a stable gas flow channel, the outer diameter of the rod body 2 in the area where the pressure-introducing hole 5 is located is reduced to form a step surface with a reduced outer diameter, so that the gas flowing out of the pressure-introducing hole 5 will not be blocked by the outer cylindrical surface of the rod body 2, and can pass into the gas pipeline (gas outlet) of the matching pressure-introducing pipe at any assembly angle of the rod body 2, and can be connected with the sensor of the measuring device to form a stable gas flow channel.

[0033] A pressure-inducing tube of a measuring device comprises a pressure-inducing tube body 20, which serves as a drainage conduit for introducing a gas to be measured of the measuring device, and is provided with a drainage hole 21 therein, one end (gas inlet end) of the drainage hole 21 being in contact with the gas to be measured, and the other end being provided with a threaded plug with a filtering structure of the utility model, wherein the plug body 1 is threadedly connected with the pressure-inducing tube body 20 through the cooperation of an external thread 3 provided on a rod body 2 with the threaded hole of the drainage hole 21, to form a blocking structure, and to close and block this end of the drainage hole 21; a plurality of gas outlets 22 are provided on the pressure-inducing tube body 20, and the gas outlets 22 are provided corresponding to the pressure-inducing holes 5 to form a gas flow channel.

[0034] A measuring device includes a pressure-guiding tube, wherein the pressure-guiding tube includes a pressure-guiding tube body 20, in which a drainage hole 21 and a plurality of gas outlets 22 are arranged. One end of the drainage hole 21 is provided with a threaded plug with a filtering structure of the utility model, and its specific structure is as described above.

[0035] The working process of the measuring device of the utility model is as follows: the gas to be measured enters through the air inlet end of the pressure-inducing tube body 20, the gas enters the inner hole 4 of the rod body 2 through the drainage hole 21, and is filtered by the filter core layer 6, that is, through the filtering effect of the waterproof and breathable membrane layer 9 and the filter mesh 10, the moisture, impurities, etc. in the gas are separated and blocked, the moisture or impurities in the gas are separated, and the gas after the moisture or impurities are separated passes through the gas channel formed by the pressure-inducing hole 5 and the gas outlet 22, and contacts with the detection components such as the sensor of the measuring device to obtain the relevant parameters that need to be detected.

[0036] The pressure-inducing device of the utility model adopts a threaded plug with a filtering structure, which can filter or separate moisture or impurities in the gas. Firstly, it can have a strong protective effect on the sensor to prevent moisture or impurities from corroding important components such as the sensor. Secondly, it can reduce or eliminate the accumulation of impurities in the pipeline and will not cause blockage during long-term use.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the technical solution. Ordinary technicians in this field should understand that those modifications or equivalent replacements of the technical solution of the utility model without departing from the purpose and scope of the technical solution of the utility model should be included in the scope of the claims of the utility model.

Claims

1. A threaded plug with a filtering structure, comprising a plug body (1), wherein an external thread (3) is arranged on a rod body (2) of the plug body (1); characterized in that: An inner hole (4) is arranged inside the rod body (2), and the inner hole (4) is connected to a plurality of pressure-inducing holes (5) arranged along the circumference of the rod body (2); a filter core layer (6) is arranged inside the inner hole (4), and the filter core layer (6) filters the gas entering the inner hole (4), and the gas flows out from the pressure-inducing holes (5) located at the rear of the inner hole (4).

2. The threaded plug with a filtering structure according to claim 1, characterized in that: An annular locking ring (7) with an inner hole is arranged in the inner hole (4); the locking ring (7) is rotated by cooperating with an inner thread corresponding to the inner hole (4) through an outer thread, so that the filter core layer (6) is arranged in the inner hole (4); or the locking ring (7) is rotatably arranged in the inner hole (4) through a boss and a groove structure arranged in cooperation.

3. The threaded plug with a filtering structure according to claim 2, characterized in that: The filter core layer (6) comprises a rubber ring (8), a water-proof and breathable membrane layer (9) and a filter screen (10) arranged in sequence, forming three overlapping filter core layers (6).

4. The threaded plug with a filtering structure according to claim 3, characterized in that: An annular embedding groove (11) is provided on the inner wall of the inner hole (4), the rubber ring (8) is fitted into the annular embedding groove (11), and the locking ring (7) is pressed onto the filter screen (10).

5. The threaded plug with a filtering structure according to any one of claims 2, 3 and 4, characterized in that: An inwardly concave operating groove (12) is provided on the surface of the locking ring (7), and when in use, the locking ring (7) is driven to rotate in the inner hole (4) through the operating groove (12).

6. The threaded plug with a filtering structure according to any one of claims 1 to 4, characterized in that: The outer diameter of the rod body (2) in the area where the pressure-inducing hole (5) is located is reduced.

7. A pressure-inducing pipe, comprising a pressure-inducing pipe body (20), characterized in that: A drainage hole (21) is provided in the pressure-inducing tube body (20), and a threaded plug with a filtering structure as claimed in any one of claims 1 to 6 is provided at one end of the drainage hole (21); the plug body (1) is threadedly connected to the pressure-inducing tube body (20) through the cooperation of the external thread (3) provided on the rod body (2) and the threaded hole of the drainage hole (21) to form a blocking structure; a plurality of gas outlets (22) are provided on the pressure-inducing tube body (20), and the gas outlets (22) are provided corresponding to the pressure-inducing holes (5).

8. A measuring device, comprising a pressure-inducing tube, characterized in that: The pressure-guiding tube is as described in claim 7.

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