Natural gas compressor crosshead forced oiling structure

Abstract

This utility model discloses a forced oil injection structure for a natural gas compressor crosshead, including a filling pipe fixedly installed at the crankcase oil injection port position; a delivery pipe is provided on the right side of the crankcase, and a check valve pipe is fixedly connected to one end of the filling pipe and the delivery pipe respectively; the filling pipe, the delivery pipe, and the check valve pipe are connected; a check valve assembly is provided in the inner cavity of the check valve pipe; the check valve assembly includes a first plug located above the inner cavity of the check valve pipe, and a second plug located at the bottom of the inner cavity of the check valve pipe. This utility model, through the combined use of a pressurizing pipe, an electric telescopic rod, and a sliding plug, intermittently pressurizes and depressurizes the inner cavity of the check valve pipe; simultaneously, through the combined use of the check valve pipe and the check valve assembly, lubricating oil is extracted and intermittently added, thus achieving the purpose of forced lubricating oil injection and stable lubricating oil injection volume.

Description

Technical Field

[0001] This utility model belongs to the field of natural gas compressor technology, and in particular relates to a forced oil injection structure for a natural gas compressor crosshead. Background Technology

[0002] The forced lubrication structure of the natural gas compressor crosshead is a lubrication system that uses an external power source (such as an oil pump) to deliver lubricating oil to the crosshead friction pair at a set pressure and flow rate. Through the forced lubrication structure, the natural gas compressor crosshead can obtain continuous and stable lubrication under high pressure and high speed conditions, which is one of the key systems to ensure the safe operation of the compressor.

[0003] During the use of a natural gas compressor, lubricating oil needs to be added to the self-filling port after a certain period of use to ensure the stable operation of the crosshead in the crankcase groove. However, manual lubrication is difficult to control the amount added each time and the operation is cumbersome. Therefore, it is necessary to provide a forced lubrication structure for the crosshead of a natural gas compressor, which adopts an electric forced lubrication method to control the amount added at one time and ensure the stable operation of the crosshead. Utility Model Content

[0004] The purpose of this invention is to provide a forced oil injection structure for a natural gas compressor crosshead, which uses an electric forced injection method to control the injection volume per injection, ensuring stable operation of the crosshead and solving the aforementioned technical problems.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A forced oil injection structure for a natural gas compressor crosshead includes an injection pipe fixedly installed at the position of the crankcase oil injection hole; a delivery pipe is provided on the right side of the crankcase; a check valve pipe is fixedly connected to one end of the injection pipe and the delivery pipe; the injection pipe, the delivery pipe and the check valve pipe are connected; a check valve assembly is provided in the inner cavity of the check valve pipe; the check valve assembly includes a first plug located above the inner cavity of the check valve pipe; a second plug is provided at the bottom of the inner cavity of the check valve pipe; a sealing ring is provided at the bottom of both the first plug and the second plug, which is fixedly connected to the check valve pipe; a pressure pipe is fixedly connected to the right side of the check valve pipe and communicates with it; an electric telescopic rod is fixedly installed on the right side of the pressure pipe; the output end of the electric telescopic rod passes through the inner cavity of the pressure pipe and is fixedly connected to a sliding plug.

[0006] Preferably, a first spring is welded to the top of the inner cavity of the check valve tube, and the bottom end of the first spring is welded to the surface of the first plug.

[0007] Preferably, a support member is fixedly connected to the middle of the inner cavity of the check valve tube, and the inner wall of the support member is provided with multiple oil holes.

[0008] Preferably, a second spring is welded to the bottom of the support member, and the bottom end of the second spring is welded to the surface of the second plug.

[0009] Preferably, the surface of the slide is fixedly connected with two sealing rings, and the surface of the sealing rings is in close contact with the inner wall of the pressure tube.

[0010] Preferably, the sealing ring has a metal skeleton inside.

[0011] The beneficial effects of this utility model are:

[0012] 1. This utility model uses the combination of a pressure pipe, an electric telescopic rod, and a sliding plug to intermittently pressurize and depressurize the inner cavity of the check valve pipe. At the same time, the combination of the check valve pipe and the check valve assembly allows for the extraction and intermittent addition of lubricating oil, thereby achieving the purpose of forced lubricating oil addition and stable lubricating oil addition.

[0013] 2. This utility model uses the cooperation of the first spring and the second spring to elastically push the first plug and the second plug respectively, so that the first plug and the second plug can actively fit into the inner cavity of the sealing ring and seal the local part of the inner cavity of the check valve tube.

[0014] 3. The present invention provides support for the second spring through the setting of the support member, and at the same time, the setting of the metal frame guides the flow of lubricating oil in the inner cavity of the check valve tube, preventing the support member from obstructing the flow of lubricating oil. Attached Figure Description

[0015] in:

[0016] Figure 1 This is a front cross-sectional view of one embodiment of the present invention;

[0017] Figure 2 This is one embodiment of the present utility model. Figure 1 A magnified view of point A in the middle;

[0018] Figure 3 This is a perspective sectional view of a check valve pipe, a check valve assembly, and a pressurizing pipe according to an embodiment of the present invention.

[0019] Figure 4 This is a three-dimensional schematic diagram of a sealing ring according to an embodiment of the present invention.

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 1. Crankcase; 2. Filling pipe; 3. Delivery pipe; 4. Check valve pipe; 5. Check valve assembly; 51. First plug; 52. First spring; 53. Support component; 54. Second plug; 55. Second spring; 56. Sealing ring; 6. Pressurization pipe; 7. Electric telescopic rod; 8. Sliding plug; 9. Sealing ring; 10. Metal skeleton; 11. Oil hole. Detailed Implementation

[0022] In the following description, embodiments of the natural gas compressor crosshead forced oil injection structure of this utility model will be described with reference to the accompanying drawings.

[0023] Figure 1-4 This invention illustrates a forced oil injection structure for a natural gas compressor crosshead according to an embodiment of the present invention. It includes a filling pipe 2 fixedly installed at the oil injection port position of a crankcase 1; a delivery pipe 3 is provided on the right side of the crankcase 1; a check valve pipe 4 is fixedly connected to one end of the filling pipe 2 and the delivery pipe 3 respectively; the filling pipe 2, the delivery pipe 3, and the check valve pipe 4 are connected; a check valve assembly 5 is provided in the inner cavity of the check valve pipe 4; the check valve assembly 5 includes a first plug 51 located above the inner cavity of the check valve pipe 4; a first spring 52 is welded to the top of the inner cavity of the check valve pipe 4; the bottom end of the first spring 52 is welded to the surface of the first plug 51; a support member 53 is fixedly connected to the middle of the inner cavity of the check valve pipe 4; multiple oil holes 11 are opened on the inner wall of the support member 53; a second spring 55 is welded to the bottom of the support member 53; the bottom end of the second spring 55 is welded to the surface of the second plug 54; through the cooperative use of the first spring 52 and the second spring 55, the first plug 51 and the second plug 54 are elastically pushed respectively. The function of the first plug 51 and the second plug 54 is to actively fit against the inner cavity of the sealing ring 56, thereby sealing a local part of the inner cavity of the check valve tube 4. The support member 53 provides support for the second spring 55. At the same time, the metal skeleton 10 guides the flow of lubricating oil in the inner cavity of the check valve tube 4, preventing the support member 53 from obstructing the flow of lubricating oil. The bottom of the inner cavity of the check valve tube 4 is provided with the second plug 54. The bottom of the first plug 51 and the second plug 54 are provided with the sealing ring 56, which is fixedly connected to the check valve tube 4. The metal skeleton 10 is provided inside the sealing ring 56. The right side of the check valve tube 4 is fixedly connected to the pressure tube 6. The right side of the pressure tube 6 is fixedly installed with the electric telescopic rod 7. The output end of the electric telescopic rod 7 passes through the inner cavity of the pressure tube 6 and is fixedly connected with the slide plug 8. Two sealing rings 9 are fixedly connected to the surface of the slide plug 8. The surface of the sealing rings 9 is tightly fitted with the inner wall of the pressure tube 6.

[0024] Working principle: When using this utility model, the user reciprocates by opening the electric telescopic rod 7, causing the sliding plug 8 to move back and forth in the inner cavity of the pressure pipe 6. This causes the inner cavities of the pressure pipe 6 and the check valve pipe 4 to reciprocate between pressurization and depressurization. During depressurization, the lubricating oil enters the check valve pipe 4 from the inner cavity of the lubricating oil delivery pipe 3. Under the pressure and the squeezing action of the lubricating oil, the second plug 54 is pushed upward, allowing the lubricating oil to enter the inner cavity of the check valve pipe 4. At the same time, the first plug 51 is tightly fitted to the sealing ring under the pressure and the elastic force of the first spring 52. The inner cavity of 56 is sealed above the inner cavity of the check valve tube 4. When pressurized, the second plug 54 is reset downward under the action of pressurization and the elastic force of the second spring 55, and pressed into the inner cavity of the sealing ring 56. At this time, the first plug 51 is lifted upward under the pressure and the squeezing action of the lubricating oil in the inner cavity of the check valve tube 4, and the lubricating oil enters the inner cavity of the filling tube 2. Under the reciprocating action of the sliding plug 8, the lubricating oil in the inner cavity of the check valve tube 4 is intermittently delivered from the inner cavity of the delivery tube 3 to the inner cavity of the filling tube 2, so that the lubricating oil can enter the housing where the crosshead is located in a metered manner.

[0025] In summary, the forced oil injection structure of this natural gas compressor crosshead, through the combined use of the pressurizing pipe 6, the electric telescopic rod 7, and the sliding plug 8, intermittently pressurizes and depressurizes the inner cavity of the check valve pipe 4. At the same time, the combined use of the check valve pipe 4 and the check valve assembly 5 extracts and intermittently injects lubricating oil, thereby achieving the purpose of forced lubricating oil injection and stable lubricating oil injection volume.

Claims

1. A forced oil injection structure for a natural gas compressor crosshead, characterized in that, The system includes a filling pipe (2) for fixing the oil filling hole of the crankcase (1): a delivery pipe (3) is provided on the right side of the crankcase (1), and a check valve pipe (4) is fixedly connected to one end of the filling pipe (2) and the delivery pipe (3). The filling pipe (2), the delivery pipe (3), and the check valve pipe (4) are connected. A check valve assembly (5) is provided in the inner cavity of the check valve pipe (4). The check valve assembly (5) includes a first plug (51) located above the inner cavity of the check valve pipe (4). A second plug (54) is provided at the bottom of the inner cavity of the check valve tube (4). Both the bottom of the first plug (51) and the second plug (54) are provided with sealing rings (56) that are fixedly connected to the check valve tube (4). A pressure tube (6) is fixedly connected to the right side of the check valve tube (4). An electric telescopic rod (7) is fixedly installed on the right side of the pressure tube (6). The output end of the electric telescopic rod (7) passes through the inner cavity of the pressure tube (6) and is fixedly connected with a sliding plug (8).

2. The forced oil injection structure for a natural gas compressor crosshead according to claim 1, characterized in that, A first spring (52) is welded to the top of the inner cavity of the check valve tube (4), and the bottom end of the first spring (52) is welded to the surface of the first plug (51).

3. The forced oil injection structure for a natural gas compressor crosshead according to claim 2, characterized in that, A support member (53) is fixedly connected to the middle of the inner cavity of the check valve pipe (4), and the inner wall of the support member (53) is provided with multiple oil holes (11).

4. The forced oil injection structure for a natural gas compressor crosshead according to claim 3, characterized in that, The bottom of the support member (53) is welded with a second spring (55), and the bottom end of the second spring (55) is welded to the surface of the second plug (54).

5. The forced oil injection structure for a natural gas compressor crosshead according to claim 4, characterized in that, Two sealing rings (9) are fixedly connected to the surface of the slide (8), and the surface of the sealing rings (9) is in close contact with the inner wall of the pressure tube (6).

6. The forced oil injection structure for a natural gas compressor crosshead according to claim 5, characterized in that, The sealing ring (56) has a metal skeleton (10) inside.

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