Diaphragm fracture alarm device for high-pressure diaphragm reciprocating pump

Abstract

The utility model relates to a diaphragm rupture alarm device for a high-pressure diaphragm reciprocating pump, which belongs to the field of diaphragm reciprocating pumps and comprises a valve body, a monitoring mechanism for monitoring and alarming diaphragm rupture is arranged on the right side of the valve body, and an oil drainage mechanism for draining redundant high-pressure oil is arranged on the inner bottom wall of the monitoring mechanism. According to the diaphragm fracture alarm device for the high-pressure diaphragm reciprocating pump, the monitoring mechanism is arranged, and the monitoring mechanism monitors the state of a diaphragm in real time through an inductive sensor, detects diaphragm fracture and can rapidly send out an alarm signal; the integrity of the diaphragm can be detected under the condition that the diaphragm is not in direct contact with a medium, pump body damage caused by diaphragm breakage can be avoided by monitoring the state of the diaphragm and replacing the diaphragm in time, so that the service life of the pump is prolonged, the broken diaphragm is allowed to be quickly recognized and replaced through the design of the monitoring mechanism, and the maintenance time and cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of diaphragm reciprocating pumps, in particular to a diaphragm rupture alarm device for a high-pressure diaphragm reciprocating pump. Background Art

[0002] A diaphragm pump is a commonly used industrial pump used to transport liquids from one place to another. Its working principle is to use a diaphragm to separate the liquid into two parts, and then achieve the suction and discharge of the liquid by periodically changing the pressure. A diaphragm pump usually consists of a pump body, two diaphragms, inlet and outlet valves and some connecting pipes. When the pressure in the pump body changes, the diaphragm will move, suck in the liquid and discharge it.

[0003] For example, a hydraulic diaphragm reciprocating pump with a diaphragm damage alarm function disclosed in Chinese patent announcement number (CN201486824U) comprises a pump head, a diaphragm and a rear diaphragm plate installed in sequence; the diaphragm is composed of two stacked single-layer diaphragms: an annular guide ring is arranged between the two single-layer diaphragms; the guide ring is connected to a pressure sensor. In the utility model, when any one of the diaphragms ruptures, high-pressure oil enters the guide ring along the gap between the two single-layer diaphragms, triggering the pressure sensor to prompt the user to prepare for replacement. The design of the two single-layer diaphragms allows the metering pump to continue to operate even if one of the diaphragms ruptures. The product process structure of the utility model is simple, has wide practicability, and has great promotion prospects.

[0004] However, the prior art such as the above patent still has the problem of poor monitoring and processing effect for diaphragm rupture of diaphragm reciprocating pumps. In the prior art, when the diaphragm ruptures, high-pressure oil needs to enter the guide ring inside it to trigger the pressure sensor, which will cause high-pressure oil to remain in the diaphragm reciprocating cavity. When the diaphragm is replaced, high pressure is likely to remain, which will affect the use effect of the diaphragm. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a diaphragm rupture alarm device for a high-pressure diaphragm reciprocating pump, which has the advantages of good diaphragm rupture monitoring and processing effect, and solves the problem of poor diaphragm rupture monitoring and processing effect for diaphragm reciprocating pumps in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a diaphragm rupture alarm device for a high-pressure diaphragm reciprocating pump, comprising a valve body, a monitoring mechanism for monitoring and alarming diaphragm rupture is provided on the right side of the valve body, and an oil drain mechanism for draining excess high-pressure oil is provided on the inner bottom wall of the monitoring mechanism;

[0007] The monitoring mechanism includes a connecting flange, a diaphragm sleeve, a diaphragm body, a polymer film and an inductive sensor. The connecting flange is clamped with the right side of the valve body, the diaphragm sleeve is fixed to the inner wall of the valve body, the diaphragm body is fixed to the left inner wall of the diaphragm sleeve, the polymer film is fixed to the right inner wall of the diaphragm sleeve, and the inductive sensor is fixed between the polymer film and the diaphragm body on the opposite side.

[0008] Furthermore, the inductive sensor is a micro thin film capacitive humidity sensor.

[0009] Furthermore, a plurality of connecting screw holes are provided on the side of the connecting flange opposite to the valve body, and the inner walls of the connecting screw holes are threadedly connected with connecting bolts.

[0010] Furthermore, the length and width of the polymer film are respectively equal to the length and width of the diaphragm body, and a wireless alarm is fixed on the outer side of the valve body and is electrically connected to the induction sensor through a wire.

[0011] Furthermore, the oil drain mechanism includes a guide pipe, a connecting pipe, a pressure relief check valve, a temporary oil storage box and an oil drain pipe, one end of the guide pipe is connected to the inner bottom wall of the connecting flange, and the other end of the guide pipe is connected to the connecting pipe, the pressure relief check valve is fixed to the outside of the guide pipe, the temporary oil storage box is fixed to the lower surface of the connecting flange, and the oil drain pipe is connected to the lower surface of the temporary oil storage box.

[0012] Furthermore, the bottom end of the connecting pipe passes through and extends to the inner top wall of the temporary oil storage box.

[0013] Furthermore, a control valve is fixed on the outer side of the oil drain pipe.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] 1. The diaphragm rupture alarm device for the high-pressure diaphragm reciprocating pump is provided with a monitoring mechanism. The monitoring mechanism monitors the state of the diaphragm in real time through an inductive sensor. Once a diaphragm rupture is detected, an alarm signal can be quickly issued to remind the operator to take corresponding measures. A miniature thin film capacitive humidity sensor is used as an inductive sensor, which can detect the integrity of the diaphragm without direct contact with the medium. By monitoring the state of the diaphragm and replacing it in time, damage to the pump body caused by diaphragm rupture can be avoided, thereby extending the service life of the pump. The design of the monitoring mechanism allows for rapid identification and replacement of ruptured diaphragms, reducing maintenance time and costs. The introduction of the monitoring mechanism improves the reliability of the entire pump system and ensures a continuous and stable production process.

[0016] 2. The diaphragm rupture alarm device for the high-pressure diaphragm reciprocating pump is provided with an oil leakage mechanism, which is designed to safely discharge the high-pressure oil leaked due to diaphragm rupture to prevent the oil from causing damage to equipment or operators. The diversion and storage functions of the oil leakage mechanism can effectively remove the high-pressure oil residue in the diaphragm reciprocating cavity, avoiding the problem of high-pressure oil residue when replacing the diaphragm. The design of the oil leakage mechanism helps to reduce the impact of oil leakage on the environment and meets environmental protection requirements. The setting of the oil leakage mechanism makes it more convenient and safer to replace the diaphragm because the residual oil can be discharged in advance, reducing the risk of maintenance personnel. The oil leakage mechanism can quickly remove the leaked oil and reduce the impact of the oil on the pump operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the monitoring mechanism of the utility model;

[0019] Figure 3 This is a schematic diagram of the oil leakage mechanism of the utility model;

[0020] Figure 4 It is a partial schematic diagram of the oil leakage mechanism of the utility model.

[0021] In the figure: 1 valve body, 2 monitoring mechanism, 21 connecting flange, 22 diaphragm sleeve, 23 diaphragm body, 24 polymer film, 25 induction sensor, 26 connecting bolts, 27 wireless alarm, 3 oil leakage mechanism, 31 guide pipe, 32 connecting pipe, 33 pressure relief check valve, 34 temporary oil storage box, 35 oil discharge pipe, 36 control valve. 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 A diaphragm rupture alarm device for a high-pressure diaphragm reciprocating pump in this embodiment includes a valve body 1. A monitoring mechanism 2 for monitoring and alarming diaphragm rupture is provided on the right side of the valve body 1. An oil drain mechanism 3 for draining excess high-pressure oil is provided on the inner bottom wall of the monitoring mechanism 2.

[0024] See also Figure 2In order to monitor and alarm for diaphragm rupture, the monitoring mechanism 2 in this embodiment includes a connecting flange 21, a diaphragm sleeve 22, a diaphragm body 23, a polymer film 24 and an inductive sensor 25. The connecting flange 21 is clamped with the right side of the valve body 1, the diaphragm sleeve 22 is fixed to the inner wall of the valve body 1, the diaphragm body 23 is fixed to the left inner wall of the diaphragm sleeve 22, the polymer film 24 is fixed to the right inner wall of the diaphragm sleeve 22, and the inductive sensor 25 is fixed between the polymer film 24 and the side opposite to the diaphragm body 23. When the pump is started, the monitoring mechanism 2 starts to work, and the inductive sensor 25 starts to monitor the humidity state of the polymer film 24.

[0025] In this embodiment, the inductive sensor 25 is a miniature thin film capacitive humidity sensor. During normal operation, the inductive sensor 25 continuously monitors the humidity between the polymer film 24 and the diaphragm body 23. At this time, the humidity should be maintained within a normal range. If the diaphragm body 23 ruptures, the medium will contact the polymer film 24, causing the humidity to change. The humidity change is detected by the inductive sensor 25, and the sensor identifies the abnormal increase in humidity. A plurality of connecting screw holes are provided on the side of the connecting flange 21 opposite to the valve body 1, and the inner wall of the connecting screw hole is threadedly connected with a connecting bolt 26. The length and width of the polymer film 24 are respectively equal to the length and width of the diaphragm body 23. A wireless alarm 27 electrically connected to the inductive sensor 25 through a wire is fixed on the outside of the valve body 1. The inductive sensor 25 converts the humidity change into an electrical signal, which is transmitted to the wireless alarm 27. When an abnormal signal is detected, the alarm is triggered. After receiving the alarm signal, the operator takes corresponding emergency measures according to the situation, such as stopping for inspection or switching to a standby pump.

[0026] See also Figure 3 to Figure 4 In order to drain the excess high-pressure oil, the oil drain mechanism 3 in this embodiment includes a guide pipe 31, a connecting pipe 32, a pressure relief check valve 33, a temporary oil storage box 34 and an oil drain pipe 35. One end of the guide pipe 31 is connected to the inner bottom wall of the connecting flange 21, and the other end of the guide pipe 31 is connected to the connecting pipe 32. The pressure relief check valve 33 is fixed to the outer side of the guide pipe 31. The pressure relief check valve 33 ensures the unidirectional flow of oil and prevents the oil from flowing back into the pump. The temporary oil storage box 34 is fixed to the lower surface of the connecting flange 21, and the oil drain pipe 35 is connected to the lower surface of the temporary oil storage box 34. When the diaphragm body 23 is broken, resulting in leakage of high-pressure oil, during the process of replacing the diaphragm, the pressure relief check valve 33 is opened to allow the leaked high-pressure oil to be guided to the temporary oil storage box 34 through the guide pipe 31.

[0027] In this embodiment, the bottom end of the connecting pipe 32 passes through and extends to the inner top wall of the temporary oil storage box 34, and a control valve 36 is fixed to the outside of the oil drain pipe 35. The high-pressure oil is temporarily stored in the temporary oil storage box 34. Further, the operator can control the discharge speed and amount of the oil through the control valve 36, so that the high-pressure oil is discharged from the temporary oil storage box 34 through the oil drain pipe 35 and safely discharged to the designated area.

[0028] The working principle of the above embodiment is:

[0029] (1) When the diaphragm rupture monitoring alarm is used, when the pump is started, the monitoring mechanism 2 starts to work, and the inductive sensor 25 starts to monitor the humidity state of the polymer film 24. During normal operation, the inductive sensor 25 continuously monitors the humidity between the polymer film 24 and the diaphragm body 23. At this time, the humidity should be kept within a normal range. If the diaphragm body 23 ruptures, the medium will contact the polymer film 24, causing the humidity to change. The humidity change is detected by the inductive sensor 25, and the sensor recognizes the abnormal increase in humidity. The inductive sensor 25 converts the humidity change into an electrical signal, which is transmitted to the wireless alarm 27. When an abnormal signal is detected, the alarm is triggered. After receiving the alarm signal, the operator takes corresponding emergency measures according to the situation, such as stopping for inspection or switching to a standby pump.

[0030] (2) When the excess high-pressure oil is used for oil drainage, when the diaphragm body 23 ruptures, resulting in leakage of high-pressure oil, during the process of replacing the diaphragm, the pressure relief check valve 33 is opened to allow the leaked high-pressure oil to be guided to the temporary oil storage box 34 through the guide pipe 31. The pressure relief check valve 33 ensures the one-way flow of oil and prevents the oil from flowing back into the pump. The high-pressure oil is temporarily stored in the temporary oil storage box 34. The operator can further control the discharge speed and amount of the oil through the control valve 36, so that the high-pressure oil is discharged from the temporary oil storage box 34 through the oil discharge pipe 35 and safely discharged to the designated area.

[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. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0032] The standard parts used in this application document can all be purchased from the market and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented through simple programming by technicians in this field, which is common knowledge in this field. Therefore, this application document will no longer explain the control method and circuit connection in detail.

[0033] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. A diaphragm rupture alarm device for a high-pressure diaphragm reciprocating pump, comprising a valve body (1), characterized in that: A monitoring mechanism (2) for monitoring and alarming diaphragm rupture is provided on the right side of the valve body (1), and an oil drain mechanism (3) for draining excess high-pressure oil is provided on the inner bottom wall of the monitoring mechanism (2); The monitoring mechanism (2) comprises a connecting flange (21), a diaphragm sleeve (22), a diaphragm body (23), a polymer film (24) and an inductive sensor (25); the connecting flange (21) is clamped to the right side of the valve body (1); the diaphragm sleeve (22) is fixed to the inner wall of the valve body (1); the diaphragm body (23) is fixed to the left inner wall of the diaphragm sleeve (22); the polymer film (24) is fixed to the right inner wall of the diaphragm sleeve (22); and the inductive sensor (25) is fixed between the polymer film (24) and the diaphragm body (23) on the opposite side.

2. A diaphragm rupture alarm device for a high-pressure diaphragm reciprocating pump according to claim 1, characterized in that: The inductive sensor (25) is a micro thin film capacitive humidity sensor.

3. A diaphragm rupture alarm device for a high-pressure diaphragm reciprocating pump according to claim 1, characterized in that: A plurality of connection screw holes are provided on the side of the connection flange (21) opposite to the valve body (1), and the inner walls of the connection screw holes are threadedly connected with connection bolts (26).

4. A diaphragm rupture alarm device for a high-pressure diaphragm reciprocating pump according to claim 1, characterized in that: The length and width of the polymer film (24) are respectively equal to the length and width of the diaphragm body (23), and a wireless alarm (27) electrically connected to the induction sensor (25) via a wire is fixed on the outer side of the valve body (1).

5. The diaphragm rupture alarm device for a high-pressure diaphragm reciprocating pump according to claim 1, characterized in that: The oil drain mechanism (3) comprises a flow guide pipe (31), a connecting pipe (32), a pressure relief check valve (33), a temporary oil storage box (34) and an oil drain pipe (35); one end of the flow guide pipe (31) is in communication with the inner bottom wall of the connecting flange (21), and the other end of the flow guide pipe (31) is in communication with the connecting pipe (32); the pressure relief check valve (33) is fixed to the outer side of the flow guide pipe (31); the temporary oil storage box (34) is fixed to the lower surface of the connecting flange (21); and the oil drain pipe (35) is in communication with the lower surface of the temporary oil storage box (34).

6. A diaphragm rupture alarm device for a high-pressure diaphragm reciprocating pump according to claim 5, characterized in that: The bottom end of the connecting pipe (32) penetrates through and extends to the inner top wall of the temporary oil storage box (34).

7. A diaphragm rupture alarm device for a high-pressure diaphragm reciprocating pump according to claim 5, characterized in that: A control valve (36) is fixed on the outer side of the oil drain pipe (35).

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