Reciprocating compressor blowdown manifold structure with liquid sealing and gas-liquid separating functions

Abstract

The invention relates to the technical field of reciprocating compressors, in particular to a reciprocating compressor blowdown manifold structure with liquid sealing and gas-liquid separation functions. Comprising a first connecting hole, a second connecting hole and a third connecting hole, a liquid seal connector is arranged in the first connecting hole, a filler drainage connector is arranged in the second connecting hole, and a filter is arranged in the third connecting hole. An exhaust joint is arranged in the third connecting hole; the end face, located in the inner cavity of the sewage collecting pipe, of the liquid seal connector is a diagonal plane. According to the invention, the liquid seal joint presents the diagonal plane, so that on one hand, exhaust gas can be conveniently discharged, and on the other hand, the liquid seal joint with the diagonal plane can be used for discharging waste oil and completing a liquid seal effect on the exhaust gas when the waste oil exceeds the diagonal plane; and the pressurized sulfur-containing process gas leaked from the filler pollution discharge joint is prevented from entering the machine body middle body through the liquid seal joint to enter a plant.

Description

Technical Field

[0001] This invention relates to the field of reciprocating compressor technology, specifically to a drain manifold structure for a reciprocating compressor with liquid seal and gas-liquid separation functions. Background Technology

[0002] In existing technology, waste oil and waste gas from reciprocating compressor units are separately discharged into the waste oil tank through waste oil and waste gas pipelines. These various waste oil and waste gas pipelines are intertwined and complex. Although the purpose of this is to separate waste oil and waste gas and discharge them into the waste oil tank, the waste oil tank is far from the compressor unit, resulting in high transportation energy consumption and requiring long pipelines. A large number of waste oil and waste gas pipelines is not conducive to material conservation, and long-distance pipelines are more likely to cause leakage risks.

[0003] Current waste oil tanks are bulky and take up a lot of space, with weak centralized processing capacity for waste gas and waste oil. Under conditions where waste gas is concentrated, the waste oil tank will quickly fill up with waste gas, and there is a risk that the gas will backflow into the waste oil discharge pipeline, exacerbating the instability of the compressor unit's operation.

[0004] Furthermore, the existing reciprocating compressors are symmetrically and staggeredly arranged, and the multi-stage compression process results in complex pipeline routes for waste oil and exhaust gas to reach the waste oil tank. This not only wastes materials but also causes the waste oil and exhaust gas pipelines to occupy the design lines of other components. Therefore, it is necessary to pre-install a device for collecting waste oil and exhaust gas next to the main unit to centralize the waste oil and exhaust gas pipelines, facilitating centralized sewage discharge and transportation, reducing transportation energy consumption, and preventing the risk of exhaust gas backflow into the waste oil pipeline. In addition, existing waste oil discharge nozzles are generally inserted directly into the waste oil tank flush, without leaving sufficient length inside the waste oil tank. This fails to prevent gas backflow into the waste oil discharge pipeline and does not effectively achieve gas-liquid separation for sewage discharge.

[0005] To minimize material loss during the discharge of waste oil and waste gas, centralized separation and discharge are necessary before the waste oil tanks are reached. Furthermore, gas-liquid separation before reaching the waste oil tanks significantly improves treatment efficiency and buffers backflow of waste gas from the tanks into the pipelines. In other words, to ensure the rational, efficient, and safe discharge of waste oil and waste gas, the length of pipelines should be minimized, and gas-liquid separation should be achieved to a certain extent.

[0006] Patent CN117883953A discloses a drying control system for a supercritical carbon dioxide compressor, belonging to the field of supercritical carbon dioxide compressor drying control. The gas-liquid separation system includes a washing tank, a wire mesh demister, and an automatic wastewater level monitoring and discharge system. The automatic wastewater level monitoring and discharge system includes a pneumatic regulating valve, a manual ball valve, an automatic wastewater discharge pipeline, a first pneumatic ball valve, a manual wastewater discharge pipeline, a valve-sleeve type discharge shut-off valve, a discharge manifold, and a discharge lifting check valve. This discharge manifold is used for dehydration and wastewater discharge outside the compressor. The gas-liquid separator system described in this patent separates a small amount of condensate in the saturated gas during cooling or pressurization, achieving condensate recovery and gas-phase purification. The entire device is a purification treatment unit outside the carbon dioxide compressor unit, and the included discharge manifold cannot solve the gas-liquid separation problem in reciprocating compressor units.

[0007] Currently, with the increasing pursuit of structural rationality in large reciprocating compressor units, the need is to make more rational use of the internal structure of the entire compressor unit, and to make the space more compact while saving materials. In addition, with the increasing pursuit of environmentally friendly compressors, the waste discharged by the compressor unit should be disposed of more rationally. This is the current research focus on the rational design of the sewage manifold of reciprocating compressors.

[0008] In summary, the existing sewage manifold components still cannot fully utilize the remaining space of the compressor unit in terms of structural design and rational layout. In addition, the setting of various waste oil and waste gas discharge components is relatively complex, making it inconvenient to set up other pipelines, which seriously affects the overall rational layout and treatment effect of the compressor unit. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide a drain manifold structure for a reciprocating compressor with liquid sealing and gas-liquid separation functions. By using the beveled surface of the joint and the symmetrical distribution of the entire joint assembly, the liquid sealing function and gas-liquid separation function of waste oil and waste gas are achieved.

[0010] The technical solution adopted by this invention to solve its technical problem is a reciprocating compressor drain manifold with liquid sealing and gas-liquid separation functions, including a drain manifold with end caps at both ends. One of the end caps has an oil drain port communicating with the inner cavity of the drain manifold. At least one set of drain structures is provided on the outer surface of the drain manifold along its axial direction. The drain structure includes a first connection hole, a second connection hole, and a third connection hole communicating with the inner cavity of the drain manifold. A liquid seal connector is provided in the first connection hole, a packing drain connector is provided in the second connection hole, and an exhaust connector is provided in the third connection hole. One end of the liquid seal connector is located outside the drain manifold, and the other end extends into the inner cavity of the drain manifold and abuts against the inner wall of the drain manifold. The end face of the liquid seal connector located in the inner cavity of the drain manifold is a beveled surface.

[0011] Furthermore, each group of the sewage discharge structures has three first connection holes.

[0012] Furthermore, the angle between the beveled surface of the liquid seal connector and the plane is 30°.

[0013] Furthermore, the axis of the liquid seal connector is perpendicular to and intersects the axis of the sewage collection manifold.

[0014] Furthermore, the liquid seal connector has a connecting thread on its end located outside the sewage collection manifold; the connecting thread can be an internal thread or an external thread.

[0015] Furthermore, the first connection hole, the second connection hole, and the third connection hole are located on the same busbar of the sewage collection manifold.

[0016] Furthermore, the end face of the sewage collection manifold is provided with a 37.5° welding surface, the end cap is provided with an mounting surface that cooperates with the welding surface, the mounting surface is welded to the welding surface, and the oil drain port is provided with a pipe plug for opening or closing the oil drain port.

[0017] Furthermore, a level gauge is installed inside the sewage collection manifold.

[0018] Furthermore, sealing elements are provided between the first connection hole and the liquid seal connector, between the second connection hole and the packing drain connector, and between the third connection hole and the exhaust connector.

[0019] Furthermore, a pressure sensor is installed inside the sewage collection manifold, and a solenoid valve is installed on the exhaust connector.

[0020] The beneficial effects of this invention are:

[0021] 1. The purpose of arranging the liquid seal joint and the packing drain joint at a reasonable distance is to facilitate easier draining of adjacent parts of the compressor.

[0022] 2. The purpose of the 30° slope of the liquid seal joint is firstly to facilitate the discharge of waste gas, and secondly, the sloped liquid seal interface can not only discharge waste oil, but also seal the waste gas when the waste oil exceeds the slope. This prevents pressurized sulfur-containing process gas leaking from the packing drain joint from entering the machine body through the liquid seal joint and thus entering the plant. This avoids the plant equipment and personnel from being affected by sulfur-containing process gas, and allows the waste gas to be discharged into the atmosphere from the exhaust joint under a certain pressure.

[0023] 3. The use of the sewage collection manifold assembly concentrates the pipelines discharging waste oil and waste gas into one place for collection, and finally separates and discharges the sewage into the waste oil tank area, which greatly saves material costs and also improves the collection efficiency of waste oil and waste gas. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a schematic diagram of a liquid seal connector;

[0026] Figure 3 This is a schematic diagram showing the connection between the end cap and the sewage collection manifold.

[0027] Reference numerals in the attached drawings: 1-Sewage collection manifold; 101-Welding surface; 2-End cap; 201-Mounting surface; 3-Oil drain port; 4-Liquid seal connector; 401-Beveled surface; 402-Connecting thread; 5-Packaging drain connector; 6-Exhaust connector; 601-Solenoid valve; 7-Pipe plug; 8-Level gauge; 9-Pressure sensor. Detailed Implementation

[0028] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0029] like Figures 1-3As shown, the present invention discloses a reciprocating compressor drain manifold with liquid sealing and gas-liquid separation functions, comprising a drain manifold 1, with end caps 2 at both ends of the drain manifold 1, and an oil drain port 3 communicating with the inner cavity of the drain manifold 1 on the end caps 2. At least one set of drain structures is provided on the outer surface of the drain manifold 1 along its axial direction. The drain structure includes a first connecting hole, a second connecting hole, and a third connecting hole communicating with the inner cavity of the drain manifold 1. A liquid seal connector 4 is provided in the first connecting hole, a packing drain connector 5 is provided in the second connecting hole, and an exhaust connector 6 is provided in the third connecting hole. One end of the liquid seal connector 4 is located outside the drain manifold 1, and the other end extends into the inner cavity of the drain manifold 1 and abuts against the inner wall of the drain manifold 1. The end face of the liquid seal connector 4 located in the inner cavity of the drain manifold 1 is a beveled surface 401. The sewage collection manifold 1 is a self-made component, constructed from No. 20 steel. The steel pipe manufacturing conforms to GB / T8163, with an inner diameter of 60mm. At both ends of the machined sewage collection manifold 1, 37.5° welding surfaces 101 are cut. Two end caps 2, made of Q235 steel, are installed at each end, and a purchased hexagonal pipe plug 7 is installed on one side. The packing drain connector 5 and vent connector 6 are also made of Q235 steel and are welded to the sewage collection manifold 1. The first, second, and third connecting holes are all circular holes. The liquid seal connector 4 is used to discharge waste oil and waste gas from the middle body, and the packing drain connector 5 is used to discharge waste oil and waste gas from the packing. After the waste oil enters the sewage collection manifold 1, it will gather at the bottom of the sewage collection manifold 1. The end face of the liquid seal connector 4 located in the inner cavity of the sewage collection manifold 1 is a beveled surface 401, and it extends into the inner cavity of the sewage collection manifold 1 and abuts against the inner wall of the sewage collection manifold 1. The beveled surface 401 is a slope of 15-60° with the horizontal plane. This setting can facilitate the discharge of waste oil and waste gas into the sewage collection manifold 1. On the other hand, when the liquid level in the sewage collection manifold 1 exceeds the beveled surface 401, the waste gas in the sewage collection manifold 1 is liquid sealed to prevent gas leakage, so that the waste gas can be discharged into the atmosphere from the exhaust pipe under a certain pressure.

[0030] To further improve the adaptability of the device, see [link to further details]. Figure 1 Each group of sewage discharge structures has three first connection holes, and each first connection hole is equipped with a liquid seal connector 4. The three liquid seal connectors 4 are respectively connected to the middle body venting, the middle body sewage discharge and the clearance cylinder venting.

[0031] Furthermore, the angle between the oblique cut surface 401 of the liquid seal connector 4 and the plane is 30°.

[0032] In order to allow the end of the liquid seal connector 4 to better extend into the bottom of the inner cavity of the sewage collection pipe 1, the axis of the liquid seal connector 4 is perpendicular to and intersects the axis of the sewage collection pipe 1.

[0033] To facilitate connection between the liquid seal connector 4 and the external drain pipe, further refer to... Figure 2The liquid seal connector 4 is provided with a connecting thread 402 on the end located outside the sewage collection pipe 1. The connecting thread 402 is an internal thread or an external thread.

[0034] Furthermore, the first connection hole, the second connection hole, and the third connection hole are located on the same busbar of the sewage collection manifold 1.

[0035] To ensure the stability of the connection between end cap 2 and sewage collection manifold 1, further, see... Figure 3 The end face of the sewage collection manifold 1 is provided with a 37.5° welding surface 101, and the end cap 2 is provided with a mounting surface 201 that cooperates with the welding surface 101. The mounting surface 201 is welded to the welding surface 101, and the oil drain port 3 is provided with a pipe plug 7 for opening or closing the oil drain port 3.

[0036] To better reflect the liquid level within the sludge collection manifold 1, further refer to... Figure 1 A level gauge 8 is installed inside the sewage collection manifold 1. When the level gauge 8 detects that the waste oil in the sewage collection manifold 1 has reached a specified height, the pipe plug 7 can be opened to discharge the waste oil in the sewage collection manifold 1.

[0037] To ensure a tight seal, sealing elements are further provided between the first connection hole and the liquid seal connector 4, between the second connection hole and the packing drain connector 5, and between the third connection hole and the vent connector 6. The sealing elements can be rubber rings. These sealing elements achieve a seal between the first connection hole and the liquid seal connector 4, the second connection hole and the packing drain connector 5, and the third connection hole and the vent connector 6, preventing waste gas or waste oil from leaking out from the connection points.

[0038] In order to monitor the pressure within the sewage manifold 1 in real time, further see... Figure 1 A pressure sensor 9 is installed inside the sewage collection manifold 1, and a solenoid valve 601 is installed on the exhaust connector 6. When the exhaust gas pressure inside the sewage collection manifold 1 reaches a set value, the solenoid valve 601 is opened to discharge the exhaust gas inside the sewage collection manifold 1.

[0039] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A drain manifold structure for a reciprocating compressor with liquid sealing and gas-liquid separation functions, comprising a drain manifold (1), wherein end caps (2) are provided at both ends of the drain manifold (1), and one of the end caps (2) is provided with an oil drain port (3) communicating with the inner cavity of the drain manifold (1), characterized in that: The outer surface of the sewage collection manifold (1) is provided with at least one set of sewage discharge structures along its axial direction. The sewage discharge structure includes a first connection hole, a second connection hole and a third connection hole that communicate with the inner cavity of the sewage collection manifold (1). A liquid seal connector (4) is provided in the first connection hole, a packing sewage discharge connector (5) is provided in the second connection hole, and an exhaust connector (6) is provided in the third connection hole. One end of the liquid seal connector (4) is located outside the sewage collection manifold (1), and the other end extends into the inner cavity of the sewage collection manifold (1) and abuts against the inner wall of the sewage collection manifold (1). The end face of the liquid seal connector (4) located in the inner cavity of the sewage collection manifold (1) is a beveled surface (401).

2. The drain manifold structure of a reciprocating compressor with liquid sealing and gas-liquid separation functions as described in claim 1, characterized in that: The first connection hole of each group of sewage discharge structures is set to 3.

3. The drain manifold structure of a reciprocating compressor with liquid sealing and gas-liquid separation functions as described in claim 1, characterized in that: The angle between the oblique cut surface (401) of the liquid seal connector (4) and the plane is 30°.

4. The drain manifold structure of a reciprocating compressor with liquid sealing and gas-liquid separation functions as described in claim 3, characterized in that: The axis of the liquid seal connector (4) is perpendicular to and intersects the axis of the sewage collection manifold (1).

5. The drain manifold structure of a reciprocating compressor with liquid sealing and gas-liquid separation functions as described in claim 1, characterized in that: The liquid seal connector (4) is provided with a connecting thread (402) on the end located outside the sewage collection manifold (1). The connecting thread (402) is an internal thread or an external thread.

6. The drain manifold structure of a reciprocating compressor with liquid sealing and gas-liquid separation functions as described in claim 1, characterized in that: The first connection hole, the second connection hole and the third connection hole are located on the same busbar of the sewage collection manifold (1).

7. The drain manifold structure of a reciprocating compressor with liquid sealing and gas-liquid separation functions as described in claim 1, characterized in that: The end face of the sewage collection manifold (1) is provided with a 37.5° welding surface (101), and the end cap (2) is provided with an installation surface (201) that cooperates with the welding surface (101). The installation surface (201) is welded to the welding surface (101), and the oil drain port (3) is provided with a pipe plug (7) for opening or closing the oil drain port (3).

8. The drain manifold structure of a reciprocating compressor with liquid sealing and gas-liquid separation functions as described in claim 7, characterized in that: A level gauge (8) is installed inside the sewage collection manifold (1).

9. The drain manifold structure of a reciprocating compressor with liquid sealing and gas-liquid separation functions as described in claim 1, characterized in that: A sealing element is provided between the first connection hole and the liquid seal connector (4), between the second connection hole and the packing drain connector (5), and between the third connection hole and the exhaust connector (6).

10. The drain manifold structure of a reciprocating compressor with liquid sealing and gas-liquid separation functions as described in claim 1, characterized in that: A pressure sensor (9) is installed inside the sewage collection manifold (1), and a solenoid valve (601) is installed on the exhaust connector (6).

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