Gas flowmeter with sealing mechanism

Abstract

The utility model provides a gas flow meter with a sealing mechanism. The gas flow meter comprises a flow meter body, an inlet connector, an outlet connector, a manual valve rod, an inlet pressure taking pipe, an outlet pressure taking pipe, a sealing pressing plate structure, two first sealing devices and two second sealing devices. The inlet connector and the outlet connector are symmetrically arranged at the left end and the right end of the flow meter body, the inlet pressure taking pipe and the outlet pressure taking pipe are symmetrically arranged on the lower end face of the flow meter body, and the manual valve rod is connected with the flow meter body and used for controlling opening and closing of the flow meter. And the inlet pressure tapping pipe and the outlet pressure tapping pipe are respectively and correspondingly provided with a first sealing device and a second sealing device. According to the gas flow meter with the sealing mechanism, the problem that in the prior art, due to the fact that the sealing performance of the connecting position of the pressure taking pipe and the main flow pipeline of a gas flow meter is poor, leaked gas can affect the actual pressure in the pressure taking pipe, and pressure measurement of the pressure taking pipe is not accurate is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas flow meters, in particular to a gas flow meter with a sealing mechanism. Background Art

[0002] A gas flow meter is an instrument used to measure gas flow and is widely used in industrial production, environmental monitoring and other fields. The gas flow meter calculates the gas flow by measuring the flow rate and pressure difference of the gas in the flow meter. In order to accurately measure, the gas flow meter is usually equipped with a pressure tube to measure the pressure at different locations. The pressure tube is an important component of the gas flow meter and is usually installed upstream and downstream of the flow meter to calculate the gas flow by measuring the pressure difference between these two points. The pressure tube usually adopts a metal pipe and is connected to the mainstream pipeline through a specific interface. Due to the poor sealing of the connection between the pressure tube of the gas flow meter and the mainstream pipeline in the related technology, the leaked gas will affect the actual pressure in the pressure tube, resulting in inaccurate pressure measurement of the pressure tube. Summary of the invention

[0003] In view of this, the present invention aims to solve one of the related technical problems at least to a certain extent.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] A gas flow meter with a sealing mechanism, comprising a flow meter body, an inlet joint, an outlet joint, a manual valve stem, an inlet pressure-taking tube, an outlet pressure-taking tube, a sealing pressure plate structure, two first sealing devices and two second sealing devices;

[0006] The inlet joint and the outlet joint are symmetrically arranged at the left and right ends of the flow meter body, the inlet pressure taking pipe and the outlet pressure taking pipe are symmetrically arranged at the lower end surface of the flow meter body, the manual valve stem is connected to the flow meter body, and the manual valve stem is used to control the switch of the flow meter;

[0007] The inlet pressure-taking pipe and the outlet pressure-taking pipe are each provided with a first sealing device and a second sealing device, the inlet pressure-taking pipe and the outlet pressure-taking pipe both pass through the sealing plate structure, the first sealing device is located above the sealing plate structure, and the second sealing device is located below the sealing plate structure;

[0008] The first sealing device includes a screwing block, a clamping sleeve, a sealing sleeve, an annular sealing ring and a plurality of strip-shaped blocks. The screwing block is threadedly connected to the outer wall of the pressure-taking tube. The clamping sleeve is arranged at the bottom of the screwing block. A plurality of strip-shaped blocks are evenly arranged in a circle on the outer wall of the clamping sleeve. The sealing sleeve is arranged on the upper end surface of the sealing pressure plate structure. The clamping sleeve, the annular sealing ring and a plurality of strip-shaped blocks are all arranged on the inner side of the sealing sleeve. The plurality of strip-shaped blocks are used to clamp the annular sealing ring.

[0009] Furthermore, the second sealing device includes a rubber sleeve, an annular rib, an annular sealing bent edge and a hollow sleeve, the rubber sleeve is arranged on the inner side of the hollow sleeve, the annular rib is arranged on the top of the rubber sleeve, the annular sealing bent edge is arranged on the bottom of the rubber sleeve, and the rubber sleeve is sleeved on the outside of the pressure taking tube.

[0010] Furthermore, the second sealing device also includes a protruding structure capable of cooperating with the inner wall of the rubber sleeve, the protruding structure is arranged on the outer wall of the pressure taking tube, and the cross section of the protruding structure is a conical structure.

[0011] Furthermore, the hollow sleeve includes two annular pressure plates and a plurality of support plates, the two annular pressure plates are sleeved on the outside of the rubber sleeve, and the plurality of support plates are evenly arranged around the circumference between the two annular pressure plates.

[0012] Furthermore, the sealing pressure plate structure is a transverse pressure plate, the middle portion of the transverse pressure plate is an arched structure, and the upper end surfaces of the left and right ends of the transverse pressure plate are fixedly connected to each corresponding to one of the sealing sleeves.

[0013] Furthermore, the sealing pressure plate structure also includes a reinforcing rib structure, and the reinforcing rib structure includes two rib plates, and the two rib plates are arranged in parallel on the upper end surface of the transverse pressure plate.

[0014] Furthermore, a plurality of sealing rings are arranged on the inner wall of the sealing sleeve.

[0015] Compared with the prior art, the gas flow meter with a sealing mechanism described in the utility model has the following advantages:

[0016] 1. Multiple annular sealing rings are arranged on the inner wall of the sealing sleeve. The compression of the strip pressure block can effectively prevent gas leakage and ensure the measurement accuracy of the flow meter. The evenly distributed strip pressure blocks compress the annular sealing rings, provide stable sealing pressure, and improve the sealing effect. The screwing pressure block is threadedly connected to the outer wall of the pressure taking tube to ensure that the sealing device is firmly combined with the pressure taking tube to avoid sealing failure caused by vibration or other external forces. The compression sleeve is at the bottom of the screwing pressure block. The compression of the sealing ring by the strip pressure block makes the structure of the entire sealing device stable and not easy to loosen.

[0017] 2. The rubber sleeve has good elasticity and sealing performance, can effectively adapt to the slight deformation of the pipeline and the pressure-taking tube, and provide a reliable sealing effect. The annular sealing bend set at the bottom of the rubber sleeve further improves the sealing effect and prevents gas from leaking along the outer wall of the pressure-taking tube. The annular rib located at the top of the rubber sleeve is in close contact with the pipe connection part, which increases the sealing area and improves the sealing performance. The conical protrusion structure on the outer wall of the pressure-taking tube fits closely with the inner wall of the rubber sleeve, effectively preventing gas from leaking from the connection and enhancing the sealing effect. The hollow sleeve consists of two annular pressure plates and multiple support plates. It has a sturdy structure and can ensure the overall mechanical stability while providing sealing.

[0018] 3. The sealing pressure plate structure is used to fix and press the sealing device at the connection between the pressure taking pipe and the flow meter body to ensure the stability and sealing effect of the entire sealing system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of a gas flow meter with a sealing mechanism according to an embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the inlet pressure-taking pipe and the outlet pressure-taking pipe according to the embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the first sealing device and the second sealing device according to an embodiment of the utility model;

[0023] Figure 4 This is a schematic diagram of the sealing pressure plate structure according to an embodiment of the utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the compression sleeve according to an embodiment of the utility model;

[0025] Figure 6 This is a schematic structural diagram of the second sealing device described in an embodiment of the utility model.

[0026] Description of reference numerals:

[0027] 101. flow meter body; 201. inlet joint; 301. manual valve stem; 401. inlet pressure-taking tube; 402. outlet pressure-taking tube; 501. sealing pressure plate structure; 502. reinforcing rib structure; 601. screw pressure block; 701. sealing sleeve; 702. strip pressure block; 703. clamping sleeve; 801. rubber sleeve; 802. raised structure; 803. hollow sleeve. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0029] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present 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 on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 an indirect connection 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 by specific circumstances.

[0031] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0032] A gas flow meter with a sealing mechanism, such as Figure 1As shown, it includes a flow meter body 101, an inlet joint 201, an outlet joint, a manual valve stem 301, an inlet pressure-taking tube 401, an outlet pressure-taking tube 402, a sealing plate structure 501, two first sealing devices and two second sealing devices; the inlet joint 201 and the outlet joint are symmetrically arranged at the left and right ends of the flow meter body 101, the inlet pressure-taking tube 401 and the outlet pressure-taking tube 402 are symmetrically arranged at the lower end surface of the flow meter body 101, the manual valve stem 301 is connected to the flow meter body 101, and the manual valve stem 301 is used to control the switch of the flow meter;

[0033] like Figure 2 As shown, the inlet pressure-taking pipe 401 and the outlet pressure-taking pipe 402 are each provided with a first sealing device and a second sealing device, and the inlet pressure-taking pipe 401 and the outlet pressure-taking pipe 402 both penetrate the sealing plate structure 501, the first sealing device is located above the sealing plate structure 501, and the second sealing device is located below the sealing plate structure 501;

[0034] like Figure 1-3 As shown, the first sealing device includes a screwing block 601, a clamping sleeve 703, a sealing sleeve 701, an annular sealing ring and a plurality of strip-shaped blocks 702. The screwing block 601 is threadedly connected to the outer wall of the pressure-taking tube. The clamping sleeve 703 is arranged at the bottom of the screwing block 601. A plurality of strip-shaped blocks 702 are evenly arranged on the outer wall of the clamping sleeve 703. The sealing sleeve 701 is provided with the upper end surface of the sealing plate structure 501. The clamping sleeve 703, the annular sealing ring and the plurality of strip-shaped blocks 702 are all arranged on the inner side of the sealing sleeve 701. The plurality of strip-shaped blocks 702 are used to clamp the annular sealing ring. A plurality of annular sealing rings are arranged on the inner wall of the sealing sleeve 701. The clamping effect of the strip-shaped blocks 702 can effectively prevent gas leakage and ensure the measurement accuracy of the flowmeter. The evenly distributed strip-shaped blocks 702 compress the annular sealing ring, provide a stable sealing pressure, and improve the sealing effect. The screwing block is threadedly connected to the outer wall of the pressure-taking tube to ensure that the sealing device is firmly combined with the pressure-taking tube to avoid sealing failure caused by vibration or other external forces. The compression sleeve 703 is at the bottom of the screwing block, and the strip-shaped block 702 compresses the sealing ring to make the entire sealing device structure stable and not easy to loosen.

[0035] like Figure 6As shown, the second sealing device includes a rubber sleeve 801, an annular rib, an annular sealing bend and a hollow sleeve 803. The rubber sleeve 801 is arranged on the inner side of the hollow sleeve 803, the annular rib is arranged on the top of the rubber sleeve 801, the annular sealing bend is arranged on the bottom of the rubber sleeve 801, and the rubber sleeve 801 is sleeved on the outside of the pressure-taking tube. In this embodiment, the second sealing device also includes a protruding structure 802 that can cooperate with the inner wall of the rubber sleeve 801. The protruding structure 802 is arranged on the outer wall of the pressure-taking tube, and the cross-section of the protruding structure 802 is a conical structure. The hollow sleeve 803 includes two annular pressure plates and multiple support plates. The two annular pressure plates are sleeved on the outside of the rubber sleeve 801, and the multiple support plates are evenly arranged around the circumference and arranged between the two annular pressure plates. The rubber sleeve 801 has good elasticity and sealing performance, can effectively adapt to the slight deformation of the pipeline and the pressure-taking tube, and provide a reliable sealing effect. The annular sealing bend provided at the bottom of the rubber sleeve 801 further improves the sealing effect and prevents gas from leaking along the outer wall of the pressure-taking tube. The annular rib located at the top of the rubber sleeve 801 is in close contact with the pipe connection part, increasing the sealing area and improving the sealing performance. The conical protrusion structure 802 on the outer wall of the pressure-taking tube is tightly matched with the inner wall of the rubber sleeve 801, effectively preventing gas from leaking from the connection and enhancing the sealing effect. The hollow sleeve 803 is composed of two annular pressure plates and multiple support plates, and has a sturdy structure, which can ensure the overall mechanical stability while providing sealing.

[0036] like Figure 4 As shown, the sealing plate structure 501 is a transverse plate, the middle part of which is an arched structure, and the upper end surfaces of the left and right ends of the transverse plate are welded to a sealing sleeve 701. In this embodiment, the sealing plate structure 501 also includes a reinforcing rib structure 502, which includes two rib plates, and the two rib plates are arranged side by side on the upper end surface of the transverse plate. The sealing plate structure 501 is used to fix and tighten the sealing device at the connection between the pressure taking tube and the flow meter body 101 to ensure the stability and sealing effect of the entire sealing system.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas flow meter with a sealing mechanism, characterized in that: It comprises a flow meter body (101), an inlet joint (201), an outlet joint, a manual valve stem (301), an inlet pressure-taking tube (401), an outlet pressure-taking tube (402), a sealing pressure plate structure (501), two first sealing devices and two second sealing devices; The inlet joint (201) and the outlet joint are symmetrically arranged at the left and right ends of the flow meter body (101); the inlet pressure-taking tube (401) and the outlet pressure-taking tube (402) are symmetrically arranged at the lower end surface of the flow meter body (101); the manual valve stem (301) is connected to the flow meter body (101); and the manual valve stem (301) is used to control the switch of the flow meter; The inlet pressure-taking pipe (401) and the outlet pressure-taking pipe (402) are each provided with a first sealing device and a second sealing device, the inlet pressure-taking pipe (401) and the outlet pressure-taking pipe (402) both pass through the sealing pressure plate structure (501), the first sealing device is located above the sealing pressure plate structure (501), and the second sealing device is located below the sealing pressure plate structure (501); The first sealing device comprises a screwing block (601), a pressing sleeve (703), a sealing sleeve (701), an annular sealing ring and a plurality of strip-shaped pressing blocks (702); the screwing block (601) is threadedly connected to the outer wall of the pressure-taking tube; the pressing sleeve (703) is arranged at the bottom of the screwing block (601); a plurality of strip-shaped pressing blocks (702) are evenly arranged in a circumference on the outer wall of the pressing sleeve (703); the sealing sleeve (701) is arranged on the upper end surface of the sealing pressure plate structure (501); the pressing sleeve (703), the annular sealing ring and the plurality of strip-shaped pressing blocks (702) are all arranged on the inner side of the sealing sleeve (701); and the plurality of strip-shaped pressing blocks (702) are used to press the annular sealing ring.

2. A gas flow meter with a sealing mechanism according to claim 1, characterized in that: The second sealing device comprises a rubber sleeve (801), an annular rib, an annular sealing bent edge and a hollow sleeve (803), wherein the rubber sleeve (801) is arranged on the inner side of the hollow sleeve (803), the annular rib is arranged on the top of the rubber sleeve (801), the annular sealing bent edge is arranged on the bottom of the rubber sleeve (801), and the rubber sleeve (801) is sleeved on the outer side of the pressure taking tube.

3. A gas flow meter with a sealing mechanism according to claim 2, characterized in that: The second sealing device also includes a protruding structure (802) capable of cooperating with the inner wall of the rubber sleeve (801); the protruding structure (802) is arranged on the outer wall of the pressure taking tube; and the cross section of the protruding structure (802) is a conical structure.

4. A gas flow meter with a sealing mechanism according to claim 2, characterized in that: The hollow sleeve (803) comprises two annular pressing plates and a plurality of supporting plates. The two annular pressing plates are sleeved on the outside of the rubber sleeve (801), and the plurality of supporting plates are evenly arranged around the circumference and arranged between the two annular pressing plates.

5. A gas flow meter with a sealing mechanism according to any one of claims 2 to 4, characterized in that: The sealing pressure plate structure (501) is a transverse pressure plate, the middle portion of which is an arched structure, and the upper end surfaces of the left and right ends of the transverse pressure plate are fixedly connected to each corresponding sealing sleeve (701).

6. A gas flow meter with a sealing mechanism according to claim 5, characterized in that: The sealing pressure plate structure (501) further comprises a reinforcing rib structure (502), wherein the reinforcing rib structure (502) comprises two rib plates, wherein the two rib plates are arranged in parallel on the upper end surface of the transverse pressure plate.

7. A gas flow meter with a sealing mechanism according to claim 5, characterized in that: A plurality of sealing rings are arranged on the inner wall of the sealing sleeve (701).

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