Diaphragm rupture monitoring device for high-sulfur-content gas three-layer diaphragm pump

Abstract

The utility model discloses an inner diaphragm rupture monitoring device for a high sulfur gas three-layer diaphragm pump, which comprises a pump head, three layers of membranes are arranged in the pump head and are respectively used as an outer layer membrane, a middle membrane and an inner layer membrane, and the outer layer membrane, the middle membrane and the inner layer membrane are clamped and fixed through a gas end cover and an inner end cover. Oil liquid is arranged between the outer layer film and the middle film and between the middle film and the inner layer film, a telescopic push rod is fixed on the inner layer film, the telescopic push rod is fixed on the inner side of the inner end cover, a section of piston is arranged on the telescopic push rod, the piston and a cylinder body of the inner end cover are sealed, and oil liquid is arranged between the piston and the inner layer film. By designing a structure convenient to test, different layers of diaphragms of the three layers of diaphragms can be monitored respectively, which layer is damaged is confirmed, maintenance and replacement are facilitated, and therefore the use safety is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil and gas development, and particularly relates to a natural gas production device, in particular to a diaphragm rupture monitoring device for a three-layer diaphragm pump for high-sulfur gas. Background Art

[0002] Natural gas processing plants and other production facilities have the problem of tail gas emissions during the production process, and the exhaust gas needs to be deeply treated to meet the emission requirements. Among the several components of tail gas, sulfur-containing tail gas is the most important. Natural gas processing plants need to pressurize and recover the sulfur-containing tail gas from existing and newly built desulfurization devices. The existing solution to flash gas pressurization is to use reciprocating compressors to achieve it. According to the pressure ratio requirements of the pressurization, multi-stage reciprocating compressors are selected for pressurization. When the diaphragm is subjected to water-containing hydrogen sulfide medium, due to its strong corrosiveness, the diaphragm is prone to rupture and other problems. The water in the medium will quickly rupture the diaphragm and cause shutdown. Therefore, it is generally necessary to use a 2-3-stage diaphragm compressor head as the core flash gas booster component. But even so, it is still required to replace and repair the damaged diaphragm in time when the machine is shut down to avoid total damage during use, forced shutdown, and additional losses. Although the diaphragm pumps on the market currently use multi-layer membranes, they do not achieve real-time monitoring of each layer of the membrane, especially for the three-layer membrane structure, which fails to achieve layered monitoring, and cannot quickly determine whether the diaphragm is damaged and cannot be repaired in time, which brings hidden dangers to use. Utility Model Content

[0003] In view of the above problems, the utility model provides a diaphragm rupture monitoring device for a three-layer diaphragm pump for high-sulfur gas. By designing a structure that is easy to test, different layers of diaphragms can be monitored separately, thereby improving safety in use.

[0004] The specific scheme of the utility model is as follows:

[0005] A diaphragm rupture monitoring device for a three-layer diaphragm pump for high-sulfur gas comprises a pump head, wherein three layers of membranes are arranged in the pump head, serving as an outer membrane, a middle membrane and an inner membrane respectively, wherein the outer membrane, the middle membrane and the inner membrane are clamped and fixed by a gas end cover and an inner end cover, oil is arranged between the outer membrane and the middle membrane, and between the middle membrane and the inner membrane, a telescopic push rod is fixed on the inner membrane, the telescopic push rod is fixed on the inner side of the inner end cover, and a piston is provided on the telescopic push rod, the piston is sealed with the cylinder body of the inner end cover, and oil is arranged between the piston and the inner membrane.

[0006] Furthermore, it also includes an intermediate cover plate arranged between the inner end cover and the gas end cover, the inner side of the intermediate cover plate is divided into at least two sections with different inner diameters, and a cover plate gasket is provided in the section with the larger inner diameter, the outer layer membrane is sealed and fixed between the intermediate cover plate and the gas end cover, the inner layer membrane is sealed and fixed between the intermediate cover plate and the inner end cover, and the intermediate membrane is fixed between the intermediate cover plate and the cover plate gasket;

[0007] At least two pressure channels are provided on the side of the middle cover plate to connect the inside and the outside, and pressure gauges are installed on the pressure channels.

[0008] Furthermore, the middle cover plate is provided with two pressure channels, which are respectively located at the two ends of the middle cover plate, and these two channels, one located at the small diameter section of the middle cover plate and the other located at the large diameter section of the middle cover plate, serve as a primary pressure channel and a secondary pressure channel respectively.

[0009] Furthermore, a channel is also provided on the cover plate gasket, which serves as an end cover pipeline, and is connected to the secondary pressure channel of the middle cover plate after the cover plate gasket is connected to the middle cover plate.

[0010] Furthermore, scale lines are provided on the end faces of the cover plate gasket and the middle cover plate. When the scale lines of the two are consistent after connection, the end cover pipeline and the secondary pressure channel are connected, and the pressure gauge is inserted and fixed into the end cover pipeline, and the end cover pipeline and the inner wall of the secondary pressure channel are sealed through the outer wall of the pressure gauge pipeline.

[0011] Furthermore, a connecting thread is provided at the end of the pressure gauge pipeline, and a sealing gasket is provided on the outer wall of the pressure gauge pipeline.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model provides a plurality of detection mechanisms to monitor different layers of membranes respectively, so as to ensure that the damaged position and amount can be known in time after damage occurs to a single layer, so as to facilitate the repair and replacement of the damaged part.

[0014] The utility model has a relatively simple structural design and is convenient for installation and positioning and alignment, and can maintain sealing and fixation after connection and installation, thereby reducing the difficulty of installation and maintenance operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the two-stage diaphragm pump of the utility model.

[0016] Figure 2 Schematic diagram of the internal structure of the diaphragm pump.

[0017] Figure 3 for Figure 2 Detail image on the left.

[0018] Figure 4 for Figure 2 Detail image on the right.

[0019] Figure 5 This is a schematic diagram of the structure of the pressure gauge. In the figure:

[0020] 1 pump head, 2 air end cover, 3 inner end cover, 4 telescopic push rod, 5 middle cover, 6 cover gasket, 7 pressure gauge, 8 outer membrane, 9 middle membrane, 10 inner membrane,

[0021] 501 primary pressure channel, 601 end cover pipe, 701 secondary pressure channel, 702 sealing gasket, 703 connecting thread. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-4 A diaphragm rupture monitoring device for a three-layer diaphragm pump for high-sulfur gas, characterized in that it includes a pump head 1, wherein the pump head 1 is provided with three layers of membranes, which are respectively used as an outer membrane 8, an intermediate membrane 9, and an inner membrane 10, wherein the outer membrane 8, the intermediate membrane 9, and the inner membrane 10 are clamped and fixed by a gas end cover 2 and an inner end cover 3, and oil is provided between the outer membrane 8 and the intermediate membrane 9, and between the intermediate membrane 9 and the inner membrane 10, and a telescopic push rod 4 is fixed on the inner membrane 10, wherein the telescopic push rod 4 is fixed on the inner side of the inner end cover 3, and a piston is provided on the telescopic push rod 4, and the piston is sealed with the cylinder body of the inner end cover, and oil is provided between the piston and the inner membrane 10. In some embodiments, the telescopic push rod 4 may not be used, and the piston may be directly used to drive the hydraulic force to realize the push-pull control of the membrane.

[0024] It also includes an intermediate cover plate 5 disposed between the inner end cover 3 and the gas end cover 2, the inner side of the intermediate cover plate 5 is divided into at least two sections with different inner diameters, and a cover plate gasket 6 is provided in the section with the larger inner diameter, an outer film 8 is sealed and fixed between the intermediate cover plate 5 and the gas end cover 2, an inner film 10 is sealed and fixed between the intermediate cover plate 5 and the inner end cover 3, and an intermediate film 9 is fixed between the intermediate cover plate 5 and the cover plate gasket 6;

[0025] At least two pressure channels are provided on the side of the middle cover plate 5 to connect the inside and the outside, and a pressure gauge 7 is installed on the pressure channel. The middle cover plate 5 is provided with two pressure channels, which are respectively located at the two ends of the circumference of the middle cover plate 5 to ensure the stress dispersion of the middle cover plate 5 processing and facilitate the subsequent installation of the pressure gauge 7. The two channels, one located at the small diameter section of the middle cover plate 5 and the other located at the large diameter section of the middle cover plate 5, serve as the primary pressure channel 501 and the secondary pressure channel 701, respectively.

[0026] The cover plate gasket 6 is also provided with a channel, which serves as an end cover pipeline 601 and is connected to the secondary pressure channel 701 of the middle cover plate 5 after the cover plate gasket 6 is connected to the middle cover plate 5 in place.

[0027] Scale lines are provided on the end faces of the cover plate gasket 6 and the middle cover plate 5. When the scale lines of the two are consistent after connection, the end cover pipeline 601 and the secondary pressure channel 701 are connected, and the pressure gauge 7 is inserted and fixed into the end cover pipeline 601. The end cover pipeline 601 and the inner wall of the secondary pressure channel 701 are sealed through the outer wall of the pressure gauge pipeline.

[0028] like Figure 5 As shown, the end of the pressure gauge pipeline is provided with a connecting thread 703, and a sealing gasket 702 is provided on the outer wall of the pressure gauge pipeline to achieve a close seal.

[0029] The method of using the utility model is as follows:

[0030] Install and fix the inner end cover 3, gas end cover 2, middle cover plate 5 and cover plate gasket 6 in place, ensure the correct installation position and depth between cover plate 5 and cover plate gasket 6, and ensure the seal between various components, then insert and fix two pressure gauges 7 to achieve the seal of pressure gauge 7. Then it can be used, and monitor whether the diaphragm is damaged during the process. When the diaphragm is damaged, the pressure in the pressure gauge area where the diaphragm is located changes, so that it can be determined whether the outer membrane 8 or the outer membrane 8 plus the middle membrane 9 is damaged.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A diaphragm rupture monitoring device for a three-layer diaphragm pump for high-sulfur gas, characterized in that: The pump head (1) comprises three layers of membranes, which are respectively an outer membrane (8), an intermediate membrane (9) and an inner membrane (10). The outer membrane (8), the intermediate membrane (9) and the inner membrane (10) are clamped and fixed by an air end cover (2) and an inner end cover (3). Oil is provided between the outer membrane (8) and the intermediate membrane (9) and between the intermediate membrane (9) and the inner membrane (10). A telescopic push rod (4) is fixed on the inner membrane (10). The telescopic push rod (4) is fixed on the inner side of the inner end cover (3). The telescopic push rod (4) is provided with a piston, which is sealed with the cylinder body of the inner end cover. Oil is provided between the piston and the inner membrane (10).

2. The diaphragm rupture monitoring device for a three-layer diaphragm pump for high-sulfur gas according to claim 1 is characterized in that: It also includes an intermediate cover plate (5) arranged between the inner end cover (3) and the gas end cover (2), the inner side of the intermediate cover plate (5) being divided into at least two sections with different inner diameters, and a cover plate gasket (6) being provided in the section with the larger inner diameter, an outer film (8) being sealed and fixed between the intermediate cover plate (5) and the gas end cover (2), an inner film (10) being sealed and fixed between the intermediate cover plate (5) and the inner end cover (3), and an intermediate film (9) being fixed between the intermediate cover plate (5) and the cover plate gasket (6); At least two pressure channels are provided on the side of the middle cover plate (5) to connect the inside and the outside, and a pressure gauge (7) is installed on the pressure channel.

3. The diaphragm rupture monitoring device for a three-layer diaphragm pump for high-sulfur gas according to claim 2 is characterized in that: The middle cover plate (5) is provided with two pressure channels, which are respectively located at two ends of the middle cover plate (5), and the two channels, one located at the small diameter section of the middle cover plate (5) and the other located at the large diameter section of the middle cover plate (5), serve as a primary pressure channel (501) and a secondary pressure channel (701), respectively.

4. The device for monitoring diaphragm rupture in a three-layer diaphragm pump for high-sulfur gas according to claim 3, characterized in that: The cover plate gasket (6) is also provided with a channel, which serves as an end cover pipeline (601) and is connected to the secondary pressure channel (701) of the middle cover plate (5) after the cover plate gasket (6) and the middle cover plate (5) are connected in place.

5. The device for monitoring diaphragm rupture in a three-layer diaphragm pump for high-sulfur gas according to claim 4, characterized in that: Scale lines are provided on the end surface of the cover plate gasket (6) and the end surface of the middle cover plate (5). When the scale lines of the two are consistent after connection, the end cover pipeline (601) and the secondary pressure channel (701) are connected, and the pressure gauge is inserted and fixed into the end cover pipeline (601). The end cover pipeline (601) and the inner wall of the secondary pressure channel (701) are sealed through the outer wall of the pressure gauge pipeline.

6. The device for monitoring diaphragm rupture in a three-layer diaphragm pump for high-sulfur gas according to claim 5, characterized in that: A connecting thread (703) is provided at the end of the pressure gauge pipeline, and a sealing gasket (702) is provided on the outer wall of the pressure gauge pipeline.

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