Gas leakage detection device

Abstract

The utility model discloses a gas leakage detection device, comprising a gas collection head used for being connected to a system to be detected and forming a seal at the joint; one end of the first header pipe is connected to the gas collecting head; one end of the airflow stabilizing device is communicated with the other end of the first header pipe and used for stabilizing airflow; and the pressure gauge is connected to the air flow stabilizing device. The gas leakage detection device can be installed at the position, penetrating through the cylinder body, of the crankshaft connected with the piston, and the pressure change of the downstream part of the piston in the cylinder body is measured, so that the sealing condition between the piston and the cylinder body is judged, and the cylinder and the piston do not need to be disassembled.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas leakage detection device technical field, more particularly, it relates to dynamic sealing system's gas leakage detection device. BACKGROUND

[0002] The reciprocating compressor includes a crankshaft, a connecting rod, a piston, an intake valve, an exhaust valve and a cylinder, and the piston and the cylinder are dynamically sealed by a piston ring and sealing packing. After being used for a period of time, the cylinder leaks air due to wear of the piston ring and the sealing packing, especially the special gas process compressor generally requires oil-free lubrication, which is more likely to cause abnormal wear. Generally, the cylinder body cannot be directly connected to a pressure gauge to detect the pressure in the cylinder body, so the wear of the piston ring and the sealing packing cannot be directly judged without disassembly.

[0003] A gas leakage detection device is needed to diagnose the wear condition of the cylinder piston without disassembly. UTILITY MODEL CONTENTS

[0004] The utility model aims to provide a gas leakage detection device to solve or at least partially alleviate the above problems.

[0005] According to the utility model, a gas leakage detection device is provided, which comprises:

[0006] A gas collecting head is used to be connected to a system to be detected and forms a seal at the connection;

[0007] A first main pipe is connected to one end of the gas collecting head;

[0008] A smooth airflow device is in communication with the other end of the first main pipe and is used to smooth the airflow; and

[0009] A pressure gauge is connected to the smooth airflow device.

[0010] Preferably, the smooth airflow device comprises a plurality of branch pipes, one end of each branch pipe is connected to the first main pipe, and the pressure gauge is connected to the other end of one of the branch pipes.

[0011] Preferably, the smooth airflow device comprises a plurality of branch pipes, one end of each branch pipe is connected to the first main pipe, and the pressure gauge is connected to the other end of two of the branch pipes.

[0012] Preferably, the smooth airflow device comprises a plurality of branch pipes, one end of each branch pipe is connected to the first main pipe, the other end of at least two of the branch pipes is connected to one end of a second main pipe, and the pressure gauge is connected to the other end of the second main pipe.

[0013] Preferably, the plurality of branch pipes further comprises a spare exhaust branch pipe, one end of which is connected to the first manifold, and the other end of which comprises an openable blocking cap.

[0014] Preferably, the two branch pipes have the same diameter.

[0015] Preferably, the pressure gauge is selected from a U-shaped pressure gauge or a differential pressure gauge.

[0016] Preferably, the two pressure gauges are respectively a U-shaped pressure gauge and a differential pressure gauge, and the U-shaped pressure gauge is further equipped with a level gauge.

[0017] Preferably, the system to be detected comprises a cylinder, a piston, a crankshaft, a connecting rod, an intake valve and an exhaust valve, the piston is driven to reciprocate in the cylinder via the crankshaft and the connecting rod, a dynamic seal is provided between the piston and the cylinder, and the connection is a crankshaft extension.

[0018] Preferably, the gas collecting head is composed of a resiliently compressible material, and the first manifold is a flexible tube.

[0019] The gas leakage detection device of the utility model can be installed at the part where the crankshaft connected with the piston passes through the cylinder body, and can measure the change of the pressure of the downstream part of the piston in the cylinder body, so as to judge the sealing condition between the piston and the cylinder body without disassembling the cylinder and the piston. BRIEF DESCRIPTION OF DRAWINGS

[0020] Other features, objects and advantages of the utility model will become more apparent from the following detailed description of non-limiting embodiments with reference to the attached drawings:

[0021] Figure 1 is a gas leakage detection device according to the first embodiment of the utility model;

[0022] Figure 2 is a gas leakage detection device according to the second embodiment of the utility model;

[0023] Figure 3 is a gas leakage detection device according to the third embodiment of the utility model; and

[0024] Figure 4 is a gas leakage detection device according to the fourth embodiment of the utility model. DETAILED DESCRIPTION

[0025] The application will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the parts related to the utility model are shown in the drawings.

[0026] This utility model describes a compressor system for testing, comprising a cylinder, piston, crankshaft, connecting rod, intake valve, and exhaust valve. The piston is driven by the crankshaft and connecting rod to reciprocate within the cylinder. A dynamic seal is established between the piston and the cylinder, with the connection point being the crankshaft extension. Cylinder leakage, also known as cylinder blow-by, refers to the amount of working medium and combustion gas that leaks into the compressor body or crankcase from the unsealed area between the cylinder and piston. As cylinder leakage increases, the compressor's efficiency gradually decreases, while gas consumption continuously increases. The gas leaking from the cylinder is characterized by high temperature, small volume, pulsation, and contamination. Particularly affected by the piston's reciprocating motion, its pressure exhibits pulsating characteristics, making it typically impossible to measure directly with a pressure gauge.

[0027] Figure 1 This is a gas leak detection device according to the first embodiment of the present invention. The gas leak detection device is generally indicated by reference numeral 10 in the figure. As shown in the figure, the gas leak detection device 10 includes a gas collecting head 11 for connecting to the system to be detected, i.e., the body or crankcase of a reciprocating compressor, and forming a seal at the connection; a first main pipe 12, one end of which is connected to the gas collecting head 11; a stabilizing airflow device 13, one end of which is connected to the other end of the first main pipe 12, for stabilizing the airflow; and a U-shaped pressure gauge 14 and a differential pressure gauge 15, connected to the stabilizing airflow device 13.

[0028] In this embodiment, the stabilizing airflow device 13 includes a first branch pipe 131 and a second branch pipe 132. One end of the first branch pipe 131 and the second branch pipe 132 are connected to the first main pipe 12 and communicate with it. The other end of the first branch pipe 131 is connected to a U-shaped pressure gauge 14, and the other end of the second branch pipe 132 is connected to a differential pressure gauge 15. Because the stabilizing airflow device 13 has multiple branches, the pulsation of the cylinder leakage collected by the air collecting head 11 can be buffered, and the pulsation is reduced, so that it can be detected by the U-shaped pressure gauge 14 and the differential pressure gauge 15. Otherwise, due to the strong pulsation, a stable pressure value cannot be detected.

[0029] Figure 1 The diagram also shows that the airflow stabilizing device 13 includes a backup exhaust manifold 16, one end of which is connected to the first main pipe 12, and the other end includes an openable plug cap 161. If the two manifolds are still insufficient to buffer the pulsation of cylinder block leakage, the plug cap 161 of the backup exhaust manifold 16 can be opened, thereby allowing the cylinder block leakage to be re-rectified and further reducing the pulsation.

[0030] Preferably, in this embodiment, the diameters of the first branch pipe 131 and the second branch pipe 132 are set to be the same, so theoretically, the U-shaped pressure gauge 14 and the differential pressure gauge 15 connected to them should display the same detection value, so that the detection values ​​can be compared.

[0031] In addition, since the accuracy of the U-shaped pressure gauge is greatly affected by whether the pressure gauge is level, it is preferable to equip the U-shaped pressure gauge with a level.

[0032] The gas collector 11 typically extends into the cylinder body through the connection between the crankshaft and the cylinder block. Therefore, the gas collector 11 is made of an elastic compressible material, and the first manifold is preferably a flexible hose.

[0033] Figure 2 This is a gas leak detection device according to the second embodiment of the present invention. The gas leak detection device is generally indicated by reference numeral 20 in the figure. As shown in the figure, the gas leak detection device 20 includes a gas collecting head 21 for connecting to the system to be detected, i.e., the body or crankcase of a reciprocating compressor, and forming a seal at the connection; a first main pipe 22, one end of which is connected to the gas collecting head 21; a smoothing airflow device 23, one end of which is connected to the other end of the first main pipe 22, for smoothing the airflow; and a U-shaped pressure gauge 24 connected to the smoothing airflow device 23.

[0034] This embodiment and Figure 1 The only difference between the first embodiment shown is that this embodiment uses only one pressure gauge, the U-shaped pressure gauge 24. The other parts are similar to the first embodiment and will not be described again. Using only one U-shaped pressure gauge 24 or a differential pressure gauge is feasible.

[0035] Figure 3 This is a gas leak detection device according to the third embodiment of the present invention. The gas leak detection device is generally indicated by reference numeral 30 in the figure. As shown in the figure, the gas leak detection device 30 includes a gas collecting head 31 for connecting to the system to be detected, i.e., the body or crankcase of a reciprocating compressor, and forming a seal at the connection; a first main pipe 32, one end of which is connected to the gas collecting head 31; a smoothing airflow device 33, one end of which is connected to the other end of the first main pipe 32, for smoothing the airflow; and a U-shaped pressure gauge 34 connected to the smoothing airflow device 33.

[0036] This embodiment and Figure 1 The only difference in the first embodiment shown is that this embodiment uses only one pressure gauge, the U-shaped pressure gauge 34, and the airflow stabilizing device 33 only includes the first branch pipe 331 and the second branch pipe 332, excluding the spare exhaust branch pipe. The other parts are similar to the first embodiment and will not be described again. According to the principle of the gas leak detection device of this utility model, if the pulsation of the leaking gas can be buffered to a level that the pressure gauge can measure through two branch pipes, then it is also feasible to use only one U-shaped pressure gauge 24 or one differential pressure gauge, and for the airflow stabilizing device 33 to include only two branch pipes for stabilizing the airflow.

[0037] In this embodiment, the first main pipe 32 can be connected to the first branch pipe 331 and the second branch pipe 332 via a three-way valve.

[0038] Figure 4 The gas leakage detection device according to the fourth embodiment of the present application is indicated by reference numeral 40 in the figure. As shown in the figure, the gas leakage detection device 40 comprises a gas collecting head 41 for connecting to the middle body or crankcase of the reciprocating compressor to be detected and forming a seal at the connection; a first main pipe 42 connected to the gas collecting head 41 at one end; a smooth airflow device 43 in communication with the other end of the first main pipe 42 for smoothing the airflow; and a U-shaped pressure gauge 44 connected to the smooth airflow device 23.

[0039] The difference between the present embodiment and the first embodiment shown in Figure 1 In the present embodiment, only one pressure gauge of the U-shaped pressure gauge 44 is used, the smooth airflow device 44 comprises a first branch pipe 441, a second branch pipe 442 and a third branch pipe 443, and one end of the first branch pipe 441, the second branch pipe 442 and the third branch pipe 443 is in communication with the first main pipe 42, and the other end of the first branch pipe 441, the second branch pipe 442 and the third branch pipe 443 is in communication with the second main pipe 47, so that the leakage gas is mixed and converged after being buffered by the first branch pipe 441, the second branch pipe 442 and the third branch pipe 443, further offsetting the pulsation component, and the effect of smoothing the airflow is best, and the pulsation of the leakage gas can be further weakened. The other parts of the present embodiment are similar to the first embodiment and will not be described again. It is also feasible to use only one U-shaped pressure gauge 24 or one differential pressure type pressure gauge in the present embodiment.

[0040] The above embodiments are exemplary embodiments of the present application, and the present application is not limited to the specific structures and quantities shown in the embodiments, for example, the number of branch pipes of the smooth airflow device is not limited to that shown in the figure, and can be any number more than two, and the shape of the branch pipes can not be linear as shown in the figure, and any structure capable of smoothing the airflow is within the scope of the present application. The pressure gauge can also be any pressure gauge capable of measuring the pressure of the airflow.

[0041] At present, the pressure value of the new equipment detected by the gas leakage detection device of the present application is almost "0", and the amount of leakage gas varies after being used for a period of time, and the detected pressure value is usually > 500 Pa before the machine is disassembled for repair. The gas leakage detection device of the present application greatly reduces the workload of disassembling and repairing.

[0042] The above description is merely the preferred embodiments of the present application and the technical principles used. It should be understood by those skilled in the art that the scope of the utility model involved in the present application is not limited to the technical solutions formed by the specific combinations of the technical features described above, and should also cover other technical solutions formed by any combinations of the technical features described above or their equivalent features without departing from the concept of the utility model. For example, the technical solutions formed by replacing the above features with the technical features disclosed in the present application (but not limited to) having similar functions.

Claims

1. A gas leak detection apparatus, characterized by, The application relates to a device for detecting a leak in a system to be detected, comprising: a gas collecting head for connecting to the system to be detected and forming a seal at the connection; a first main pipe connected at one end to the gas collecting head; a gas flow smoothing device in communication at one end with the other end of the first main pipe for smoothing the gas flow; and a pressure gauge connected to the gas flow smoothing device. The gas flow smoothing device comprises a plurality of branch pipes, one end of each branch pipe being connected to the first main pipe and the pressure gauge being connected to the other end of one of the branch pipes.

2. The gas leak detection apparatus of claim 1, wherein The gas flow smoothing device comprises a plurality of branch pipes, one end of each branch pipe being connected to the first main pipe, and two pressure gauges being connected to the other end of two of the branch pipes respectively.

3. The gas leak detection apparatus of claim 1, wherein The gas flow smoothing device comprises a plurality of branch pipes, one end of each branch pipe being connected to the first main pipe, the other end of at least two of the branch pipes being connected to one end of a second main pipe, and the pressure gauge being connected to the other end of the second main pipe.

4. The gas leak detection apparatus of claim 1, wherein The plurality of branch pipes further comprises a spare exhaust branch pipe, one end of the spare exhaust branch pipe being connected to the first main pipe and the other end comprising an openable blocking cap.

5. The gas leak detection apparatus of any one of claims 2-4, wherein, The two branch pipes have the same pipe diameter.

6. The gas leak detection apparatus according to claim 2 or 3, characterized by The pressure gauge is selected from a U-shaped pressure gauge or a differential pressure gauge.

7. The gas leak detection apparatus of any one of claims 1-4, wherein, The two pressure gauges are a U-shaped pressure gauge and a differential pressure gauge respectively, and the U-shaped pressure gauge is further provided with a level gauge.

8. The gas leak detection apparatus of claim 3, wherein The system to be detected comprises a cylinder, a piston, a crankshaft, a connecting rod, an intake valve and an exhaust valve, the piston being driven to reciprocate in the cylinder via the crankshaft and the connecting rod, a dynamic seal being provided between the piston and the cylinder, and the connection being a crankshaft extension.

9. The gas leak detection apparatus of any one of claims 1-4, wherein, The gas collecting head is made of a resiliently compressible material, and the first main pipe is a flexible pipe.

10. The gas leak detection apparatus of any one of claims 1-4, wherein, ​

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