A diaphragm rupture identification and alarm mechanism for a diaphragm pump for high sulfur gas compression

Abstract

The utility model discloses a diaphragm rupture identification alarm mechanism for a diaphragm pump for high-sulfur gas compression, including a pump head, the pump head including an inner end cover, an intermediate cover and a gas end cover, the intermediate cover is arranged between the gas end cover and the inner end cover, and clamps and fixes an outer membrane and an inner membrane respectively, the outer membrane and the inner membrane are both flexible membrane structures, the outside is fixed in the step of the middle cover end face through a hard sealing edge, and is fixed and sealed by the pressing force of the gas end cover and the inner end cover; a piston push-pull mechanism is arranged in the cavity of the inner end cover, including a piston connected to the inner wall of the cavity, and a rod connected to the inner membrane; a pressure detection system is arranged between the inner membrane and the outer membrane. According to the characteristics of sulfur-containing natural gas, the utility model realizes the effect of optical detection, and can judge whether the diaphragm is damaged, thereby avoiding the situation of false alarm caused by pressure fluctuation.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil and gas development, in particular to a natural gas production device, in particular to a diaphragm rupture identification and alarm mechanism in a diaphragm pump for high-sulfur gas compression. 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. However, when the diaphragm is subjected to water-containing hydrogen sulfide media, it is easy to break and other problems, especially under the pressure of the high-pressure gas itself and the impact of the solid phase carried, it is more likely to be damaged. Once all the diaphragms are broken, it will quickly lead to shutdown. Therefore, it is generally necessary to use a two-layer diaphragm compressor head as the core flash gas booster component. But even so, it is still necessary to replace and repair the damaged diaphragm in time to avoid total damage and affect the use. Although the diaphragm pumps on the market currently use multi-layer membranes, they are generally tested by pressure. This detection method has certain errors and may cause false alarms, which brings certain uncertainties to construction and repair. Utility Model Content

[0003] In view of the above problems, the utility model provides a diaphragm rupture identification and alarm mechanism for a diaphragm pump for high-sulfur gas compression, which achieves the effect of optical detection based on the characteristics of sulfur-containing natural gas and avoids false alarms caused by pressure fluctuations.

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

[0005] A diaphragm rupture identification and alarm mechanism for a diaphragm pump for compressing high-sulfur gas comprises a pump head, wherein the pump head comprises an inner end cover, an intermediate cover and a gas end cover, wherein the intermediate cover is arranged between the gas end cover and the inner end cover, and clamps and fixes an outer membrane and an inner membrane respectively, wherein both the outer membrane and the inner membrane are flexible membrane structures, and the outside is fixed in a step of the middle cover end face by a hard sealing edge, and is fixed and sealed by the pressing force of the gas end cover and the inner end cover; a piston push-pull mechanism is arranged in the cavity of the inner end cover, comprising a piston connected to the inner wall of the cavity, and a rod connected to the inner membrane; a pressure detection system is arranged between the inner membrane and the outer membrane.

[0006] Furthermore, the wall surface of the middle cover is provided with an L-shaped connecting pipe, one end of the connecting pipe is connected to the outside of the side wall, and the other end is connected to the inner step surface, and is located on the inner side of the sealing edge of the adjacent outer membrane or inner membrane, so that the inner end of the connecting pipe is located between the outer membrane and the inner membrane.

[0007] Furthermore, the pressure detection system also includes a pressure gauge, which includes a pressure gauge head and a transparent pressure gauge tube. A test paper holder is provided in the pressure gauge tube, and a test paper piece is installed thereon. The test paper holder is also made of a transparent material. A light detector is provided on the outside of the pressure gauge tube, and the light detector is facing the test paper piece.

[0008] Furthermore, the structure of the test paper holder is a card slot structure, including two pieces of holder bodies, the gap between the two pieces of holder bodies serves as a slot body, slot edges are provided on both sides of the slot body, and a slit is provided on the inner side of the slot edge, and the test paper is inserted into the slit and clamped.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] By designing a light detection scheme for use in parallel with the pressure gauge, it is possible to determine whether sulfur-containing fluid has entered by observing the color change of the test paper when pressure fluctuations occur, and to determine whether there is any damage based on the pressure changes.

[0011] The structural improvement allows the test paper to be fixed in the pressure gauge tube and is easy to disassemble and replace. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of the diaphragm pump of the utility model.

[0013] Figure 2 Schematic diagram of the structure inside the diaphragm pump area.

[0014] Figure 3 for Figure 2 Detail of the upper part.

[0015] Figure 4 for Figure 3 Detail picture of.

[0016] Figure 5 It is a schematic diagram of the installation of the test paper holder and the test paper.

[0017] In the figure:

[0018] 1 pump head, 2 inner end cover, 3 outer membrane, 4 inner membrane, 5 gas end cover, 6 middle cover, 7 piston push-pull mechanism, 8 pressure gauge, 9 light detector, 10 test paper,

[0019] 401 sealing edge, 601 connecting pipe, 801 pressure gauge head, 802 pressure gauge tube, 803 test paper holder, 8031 ​​holder body, 8032 slot body, 8033 slot edge. DETAILED DESCRIPTION

[0020] 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.

[0021] like Figure 1-2 The invention discloses a diaphragm rupture identification and alarm mechanism for a diaphragm pump for high-sulfur gas compression, comprising a pump head 1, wherein the pump head 1 comprises an inner end cover 2, an intermediate cover 6 and a gas end cover 5, wherein the intermediate cover 6 is arranged between the gas end cover 5 and the inner end cover 2, and clamps and fixes an outer membrane 3 and an inner membrane 4 respectively, wherein the outer membrane 3 and the inner membrane 4 are both flexible membrane structures, and are fixed in the step of the end face of the intermediate cover 6 through a hard sealing edge 401 on the outside, and are fixed and sealed by the pressing force of the gas end cover 5 and the inner end cover 2; a piston push-pull mechanism 7 is arranged in the cavity of the inner end cover 2, comprising a piston connected to the inner wall of the cavity, and a rod connected to the inner membrane 4; and a pressure detection system is arranged between the inner membrane 4 and the outer membrane 3. In some embodiments, a hydraulic mechanism may be used to replace the piston push-pull mechanism 7.

[0022] like Figure 3 As shown, the wall surface of the middle cover is provided with an L-shaped connecting pipe 601, one end of the connecting pipe 601 is connected to the outside of the side wall, and the other end is connected to the inner step surface, and is located at the inner side of the sealing edge 401 of the adjacent outer membrane 3 or inner membrane 4, so that the inner end of the connecting pipe 601 is located between the outer membrane 3 and the inner membrane 4. Such a design can reduce the direct impact of the two layers of fluid on the pressure gauge, thereby avoiding affecting the life of the pressure gauge.

[0023] like Figure 4 As shown, the pressure detection system further includes a pressure gauge 8, which is preferably arranged on the top of the middle cover 6. The pressure gauge 8 includes a pressure gauge head 801 and a transparent pressure gauge tube 802. A test paper holder 803 is provided in the pressure gauge tube 802, and a test paper sheet 10 is installed. The test paper holder 803 is also made of transparent material; a light detector 9 is provided on the outside of the pressure gauge tube 802, and the light detector 9 is directly facing the test paper sheet 10. The test paper sheet 10 is a hydrogen sulfide test paper (such as lead acetate test paper, etc.), which will change color when encountering hydrogen sulfide. The light detector 9 can use a conventional color detector currently available on the market, such as a colorimeter NR200 and other models.

[0024] like Figure 5 As shown, the structure of the test paper holder 803 is a card slot structure, including two pieces of holder bodies 8031, the gap between the two pieces of holder bodies 8031 ​​serves as a slot body 8032, slot edges 8033 are provided on both sides of the slot body 8032, and a slit is provided on the inner side of the slot edge, and the test paper 10 is inserted into the slit and clamped.

[0025] The usage of the utility model is as follows:

[0026] When the test strip 10 needs to be installed, the pressure gauge 8 is removed and the test strip 10 is inserted from the lower end of the pressure gauge tube 802 into the groove edge 8033. Since the groove body 8032 has a certain gap, it is convenient for contact with the fluid medium, so that the test strip 10 can change color after contact. If the outer membrane 3 is corroded and damaged by the medium at this time, causing the sulfur-containing medium to enter between the inner membrane 4 and the outer membrane 3, and then enter the pressure gauge 8 through the connecting tube 601, the test strip 10 changes color at this time, and the real-time monitoring light detector 9 detects the change and issues a command to indicate that a fault has occurred, which is convenient for maintenance personnel to handle.

[0027] 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.

[0028] 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 identification and alarm mechanism for a diaphragm pump for high-sulfur gas compression, characterized in that: The pump head (1) comprises an inner end cover (2), an intermediate cover (6) and an air end cover (5); the intermediate cover (6) is arranged between the air end cover (5) and the inner end cover (2), and clamps and fixes an outer membrane (3) and an inner membrane (4) respectively; the outer membrane (3) and the inner membrane (4) are both flexible membrane structures, and are fixed in a step on the end face of the intermediate cover (6) through a hard sealing edge (401) on the outside, and are fixed and sealed by the pressing force of the air end cover (5) and the inner end cover (2); a piston push-pull mechanism (7) is arranged in the cavity of the inner end cover (2), comprising a piston connected to the inner wall of the cavity, and a rod connected to the inner membrane (4); a pressure detection system is arranged between the inner membrane (4) and the outer membrane (3).

2. The diaphragm rupture identification and alarm mechanism for a diaphragm pump for high-sulfur gas compression according to claim 1 is characterized in that: The wall surface of the middle cover is provided with an L-shaped connecting tube (601), one end of the connecting tube (601) is connected to the outside of the side wall, and the other end is connected to the inner step surface, and is located on the inner side of the sealing edge (401) of the adjacent outer film (3) or inner film (4), so that the inner end of the connecting tube (601) is located between the outer film (3) and the inner film (4).

3. The diaphragm rupture identification and alarm mechanism for a diaphragm pump for high-sulfur gas compression according to claim 2 is characterized in that: The pressure detection system further comprises a pressure gauge (8), the pressure gauge (8) comprising a pressure gauge head (801) and a transparent pressure gauge tube (802), a test paper holder (803) being provided inside the pressure gauge tube (802), and a test paper sheet (10) being installed thereon, the test paper holder (803) also being made of a transparent material; and a light detector (9) being provided outside the pressure gauge tube (802), and the light detector (9) being directly opposite to the test paper sheet (10).

4. The diaphragm rupture identification and alarm mechanism for a diaphragm pump for high-sulfur gas compression according to claim 3 is characterized in that: The structure of the test paper holder (803) is a card slot structure, comprising two pieces of holder bodies (8031), the gap between the two pieces of holder bodies (8031) serving as a slot body (8032), slot edges (8033) being provided on both sides of the slot body (8032), and a slit being provided on the inner side of the slot edge (8033), and the test paper (10) being inserted into the slit and clamped and fixed.

Images