A convenient debugging device for a mechanical pressure relay and a method of using the same

Abstract

The present invention discloses a convenient debugging device for a mechanical pressure relay and a method for using the same, which belongs to the field of debugging equipment for mechanical pressure relays. The device mainly solves the problems of low debugging efficiency, large error and labor consumption of the current mechanical pressure relay. The convenient debugging device includes a signal detection device and a pressure supply and pressure measuring device. The signal detection device includes a battery, which is connected to a quick plug through a power connection line. A buzzer is provided on the power connection line. The pressure supply and pressure measuring device includes an equipment pressure regulating joint, which is connected to one of the joints of a tee through a pressure measuring joint 1, and the second joint of the tee is connected to the pressure port of the mechanical pressure relay through a pressure measuring joint 2. The last joint of the tee is connected with a pressure gauge, and the connection between the pressure supply and the pressure measuring device is connected using a pressure measuring hose. The method for using the device is also disclosed. The use of the device and method can improve the debugging efficiency, reduce labor and make the debugging alarm value accurate.

Description

Technical Field

[0001] The invention belongs to the field of mechanical pressure relay debugging equipment, and in particular relates to a convenient debugging device for a mechanical pressure relay and a use method thereof. Background Art

[0002] When working on-site, the PLC electrical cabinet is usually far away from the mechanical pressure relay on-site, and there are usually many devices between the two. The two devices need to be debugged together to set the overpressure or underpressure alarm value. The two devices are far away in a particularly noisy environment, and debugging can only be done by multiple people passing words or communicating with each other using walkie-talkies. Debugging in these two ways is labor-intensive, and there is a time error in multiple people passing words or communicating. The error of the alarm value adjusted is large, which is extremely inconvenient. The safety protection of the equipment is lacking, and it will cause shutdown in serious cases. Summary of the invention

[0003] In order to solve the problems in the above-mentioned background technology, the present invention provides a convenient debugging device for a mechanical pressure relay and a method for using the same, which is divided into two devices, a signal detection device and a pressure supply and pressure measuring device, wherein the signal detection device can directly and quickly detect the signal point, and the pressure supply and pressure measuring device provides a pressure source for the mechanical pressure relay during detection and detects the real-time pressure value. At the same time, a method for using the convenient debugging device is also provided, so that one person can realize convenient and fast online debugging, thereby improving work efficiency and reducing manpower.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] The present invention provides a convenient debugging device for a mechanical pressure relay, which is characterized in that it includes a signal detection device and a pressure supply and pressure measuring device, the signal detection device includes a battery, the battery is connected to a quick plug through two power connection lines, a buzzer is arranged on one of the power connection lines, the pressure supply and pressure measuring device includes an equipment pressure regulating joint, the equipment pressure regulating joint is connected to one of the joints of a tee through a pressure measuring joint 1, the second joint of the tee is connected to the pressure port of the mechanical pressure relay through a pressure measuring joint 2, the last joint of the tee is connected to a pressure gauge, and the pressure supply and pressure measuring devices are both connected using a pressure measuring hose.

[0006] By setting up a signal detection device instead of the PLC electrical cabinet for signal detection, setting up a pressure supply and pressure measuring device to debug the mechanical pressure relay, wherein the signal detection device is powered by a separate battery to ensure that it can be used independently, and the buzzer facilitates signal transmission. At the same time, the pressure supply equipment and the mechanical pressure relay are connected with a tee, and a pressure gauge is set to display the pressure to form a debugging loop, which can be debugged by a single person.

[0007] Furthermore, in the signal detection device, an electrical detection switch is connected between the two power connection lines, and the electrical detection switch is arranged between the buzzer and the quick plug. The electrical detection switch can detect whether the battery is low and whether the buzzer is working normally.

[0008] Furthermore, in the pressure supply and pressure measuring device, the last joint of the three-way is connected to a three-way ball valve, one of the joints of the three-way ball valve is connected to pressure gauge 1 through pressure measuring joint 3, and the last joint of the three-way ball valve is connected to pressure gauge 2 through pressure measuring joint 4. Since it is necessary to detect the two states of overpressure and underpressure of the mechanical pressure relay, two pressure gauges are provided.

[0009] Furthermore, the pressure gauge 1 and the pressure gauge 2 are respectively a high pressure gauge and a low pressure gauge. The high pressure gauge has a larger range and can meet the pressure at high pressure, while the low pressure gauge has a smaller range but its measurement is more accurate, ensuring the accurate setting of the pressure loss pressure.

[0010] Furthermore, the buzzer is provided with an indicator light, which can display signals through sound and light to remind the debugging personnel from multiple angles.

[0011] A method for conveniently debugging a device using a mechanical pressure relay is also provided, which is characterized by comprising the following steps:

[0012] S1, self-check the mechanical pressure relay debugging device;

[0013] S2, remove the permanent plug of the mechanical pressure relay, and then plug in the quick plug of the signal detection device. Select the pressure gauge according to whether you want to adjust the overpressure alarm or the underpressure alarm. Select pressure gauge 1 for overpressure alarm and pressure gauge 2 for underpressure alarm.

[0014] S3, connect the pressure measuring joint 2 to the pressure port of the mechanical pressure relay, and the pressure measuring joint 1 to the equipment pressure regulating joint. The equipment pressure regulating joint is equipped with a pressure regulating valve to adjust the pressure source;

[0015] S4, after all the lines are connected, adjust the adjustment screw of the mechanical pressure relay, observe the sound of the buzzer or the indicator light, and then observe whether the pressure value of the pressure gauge is consistent with the alarm value of the mechanical pressure relay.

[0016] For overpressure alarm debugging, the adjusting screw needs to be tightened to the bottom, and the buzzer does not sound or the indicator light does not light up. For underpressure alarm debugging, the adjusting screw needs to be loosened to the bottom, and the buzzer sounds or the indicator light up.

[0017] S5, if the pressure value observed in the pressure gauge is different from the alarm value, if the pressure has not reached the alarm value or is higher than the alarm value, the pressure regulating valve at the pressure regulating joint of the equipment can be used to increase or reduce the pressure to the alarm value required by the mechanical pressure relay, and then the adjusting screw of the mechanical pressure relay can be slowly adjusted, and the signal change of the buzzer can be observed. If there is a change, stop adjusting the adjusting screw immediately;

[0018] S6, after debugging, adjust the pressure regulating valve at the pressure regulating joint of the equipment again, and observe the signal of the buzzer during the adjustment process. After the signal changes, adjust the pressure regulating valve in the opposite direction. When the buzzer signal changes again, stop adjusting. This means that the PLC has received the signal. Then observe whether the data in the pressure gauge is consistent with the set alarm value.

[0019] S7. If the value observed on the pressure gauge is slightly higher than the alarm value required to be set for the mechanical pressure relay, slightly loosen the adjusting screw of the mechanical pressure relay and then perform another debugging according to the steps in S6 above. If the value observed on the pressure gauge is slightly lower than the alarm value required to be set for the mechanical pressure relay, slightly tighten the adjusting screw of the mechanical pressure relay and then perform another debugging according to the steps in S6 above.

[0020] S8, follow the debugging steps in S6 to finally verify that the value displayed on the pressure gauge is consistent with the alarm value signal set by the mechanical pressure relay.

[0021] S9, remove the quick plug used for debugging the mechanical pressure relay, and then plug in the permanent plug of the mechanical pressure relay to observe whether the signal of the PLC module is received. If the signal of the PLC module is received, it proves that the line between the permanent plug and the PLC module and the PLC module are fine. If the signal is always received after the pressure is increased to 10MPa, replace the spare line or replace the spare point in the PLC module.

[0022] S10, calibrate the pressure of the pressure regulating valve at the pressure regulating joint of the equipment to the design pressure. After the pressure regulating valve is calibrated to the design pressure, the overpressure or underpressure signal of the mechanical pressure relay will disappear, which means that the system pressure is normal and is not higher or lower than the design pressure. At the same time, remove one end of the pressure hose at the pressure measuring joint one, then remove one end of the pressure hose at the pressure measuring joint two, and finally connect the pressure port of the mechanical pressure relay to the pressure regulating joint of the equipment. The alarm debugging of the mechanical pressure relay is completed.

[0023] Furthermore, the self-check in step S1 includes using an electrical detection switch to detect whether the battery is low and whether the buzzer is working properly, and also includes detecting whether the pressure gauge 1 and the pressure gauge 2 are at the 0 position.

[0024] Further, in step S5, the overpressure alarm debugging needs to slowly loosen the mechanical pressure relay adjusting screw. During the adjustment process, listen to the sound of the buzzer or see the indicator light up. Stop loosening the mechanical pressure relay adjusting screw immediately after either the buzzer sounds or the light turns on or both signals are sent out. The underpressure alarm debugging needs to slowly tighten the mechanical pressure relay adjusting screw. During the adjustment process, listen to the sound of the buzzer disappear or see the indicator light go out. Stop tightening the mechanical pressure relay adjusting screw immediately after either the buzzer sounds or the light goes out or both signals are sent out.

[0025] Further, in step S6, the overpressure alarm debugging needs to adjust the pressure regulating valve at the pressure regulating joint of the equipment again to release the pressure until the buzzer sound and the light signal disappear, and then slowly adjust the pressure regulating valve to slowly increase the pressure. While increasing the pressure, listen to the sound of the buzzer or see the indicator light. When either the buzzer sound or the light turns on or both signals are sent out at the same time, stop adjusting the pressure regulating valve immediately. At this time, the buzzer sound and the light turn on represent that the PLC has received the alarm value signal sent by the mechanical pressure relay, and then observe whether the value displayed in the pressure gauge 1 is consistent with the alarm value required to be set by the mechanical pressure relay;

[0026] The depressurization alarm debugging needs to adjust the pressure regulating valve at the pressure regulating joint of the equipment again to increase the pressure until the buzzer sounds or the indicator light comes on, and then slowly adjust the pressure regulating valve to slowly release the pressure. While releasing the pressure, listen for the buzzer to disappear or the indicator light to go out. Stop adjusting the pressure regulating valve immediately after either the buzzer sounds or the light goes out, or both signals are sent out at the same time. At this time, the buzzer disappears and the light goes out, which means that the PLC has received the alarm value signal from the mechanical pressure relay. Then observe whether the value displayed in the pressure gauge 2 is consistent with the alarm value required to be set by the mechanical pressure relay.

[0027] Compared with the prior art, the beneficial effect of using the present invention lies in that, by setting a signal detection device and a pressure supply and pressure measuring device, the signal detection device replaces the signal of the PLC electrical cabinet, and the signal can be directly and quickly detected. The pressure supply and pressure measuring device provides a pressure source for the mechanical pressure relay during detection and detects the real-time pressure value. At the same time, a method for using the convenient debugging device is also provided, in which the accuracy of overpressure and underpressure pressure is verified multiple times. One person can perform online debugging conveniently and quickly, thereby improving work efficiency and reducing manpower. At the same time, since this device has a separate power supply, it can be used as an offline detection device, and can first detect whether the alarm value is accurate after a long period of shutdown. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A structural schematic diagram of a signal detection device of a convenient debugging device for a mechanical pressure relay provided by the present invention;

[0029] Figure 2 It is a structural schematic diagram of the pressure supply and pressure measuring device.

[0030] Among them: 1. Signal detection device; 2. Pressure supply and pressure measuring device; 101. Battery; 102. Buzzer; 103. Electrical detection switch; 104. Quick plug; 201. Equipment pressure regulating joint; 202. Tee; 203. Pressure measuring joint 1; 204. Pressure measuring joint 2; 205. Pressure measuring joint 3; 206. Pressure measuring joint 4; 207. Three-way ball valve; 208. Pressure port of mechanical pressure relay; 209. Pressure gauge 1; 210. Pressure gauge 2. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and beneficial effects of the present invention more clearly understood, the technical solution of the present invention is described in detail below with reference to the accompanying drawings.

[0032] A convenient debugging device for a mechanical pressure relay, such as Figure 1 and Figure 2 The convenient debugging device includes a signal detection device 1 and a pressure supply and pressure measuring device 2. The signal detection device 1 includes a battery 101, which provides power for the signal detection device 1 to operate and can operate independently without finding other power sources or power supply facilities. The battery 101 is connected to a quick plug 104 through two power connection lines for connecting a mechanical pressure relay. A buzzer 102 is provided on one of the power connection lines, and an electrical detection switch 103 is connected between the two power connection lines. The electrical detection switch 103 is provided between the buzzer 102 and the quick plug 104. The electrical detection switch 103 can detect whether the buzzer 102 can be used normally, and can detect whether the battery 101 is low on power. Furthermore, in order to better transmit the signal, the buzzer 102 is provided with an indicator light, which can be transmitted through sound and light.

[0033] The pressure supply and pressure measuring device 2 includes an equipment pressure regulating joint 201, which is connected to the pressure supply pipeline to provide a pressure source, and a pressure regulating valve is arranged inside the equipment pressure regulating joint 201 to adjust the supplied pressure. The equipment pressure regulating joint 201 is connected to one of the joints of the three-way joint 202 through a pressure measuring joint 1 203, and the second joint of the three-way joint 202 is connected to the pressure port 208 of the mechanical pressure relay through a pressure measuring joint 204, and the pressure port 208 of the mechanical pressure relay is connected to the inside of the relay. The last joint of the three-way joint 202 is connected to a three-way ball valve 207, and one of the joints of the three-way ball valve 207 is connected to a pressure gauge 1 209 through a pressure measuring joint 3 205, and the last joint of the three-way ball valve 207 is connected to a pressure gauge 2 210 through a pressure measuring joint 4 206, wherein all the pressure measuring joints are equipped with a one-way valve to quickly seal the pressure source.

[0034] Since the method of the present invention debugs the mechanical pressure relay, it is necessary to debug the overpressure alarm and the underpressure alarm. Therefore, the pressure gauge 209 and the pressure gauge 210 are respectively a high-pressure pressure gauge and a low-pressure pressure gauge. The high-pressure pressure gauge has a larger range to meet the pressure at high pressure, and the low-pressure pressure gauge has a smaller range but its measurement is more accurate, ensuring the accurate setting of the underpressure pressure.

[0035] The device is provided with a signal detection device 1 to replace the signal of the PLC electrical cabinet, and can transmit signals according to overpressure or underpressure. A separate battery 101 is provided to supply power, which can be used independently. At the same time, the pressure supply and pressure measuring device 2 is used to debug the mechanical pressure relay. The tee 202 is used for connection, and pressure can be supplied and adjusted. The pressure gauge is set to display the pressure to ensure the accuracy of the alarm value setting, forming a debugging loop, which can be debugged by a single person.

[0036] At the same time, the present invention also discloses a method for conveniently debugging a mechanical pressure relay, wherein the debugging is divided into overpressure alarm debugging and underpressure alarm debugging, wherein the overpressure alarm debugging includes the following steps:

[0037] S1, self-check the mechanical pressure relay debugging device, mainly use the electrical detection switch 103 to detect whether the battery 101 is low and whether the buzzer 102 is working normally. If the detection is normal, turn off the electrical detection switch 103, and at the same time check whether the pressure gauge 1 209 and the pressure gauge 2 210 are at the 0 position. If not, disassemble the pressure measuring joint 3 205 and the pressure measuring joint 4 206, and observe again whether they are at the 0 position. If they are at the 0 position, it proves that the pressure gauge is normal. If not, replace the pressure gauge with a new one.

[0038] S2, remove the permanent plug of the mechanical pressure relay, then plug in the quick plug 104 of the signal detection device 1, and switch the three-way ball valve 207 to the pressure gauge 1 209;

[0039] S3, connect the pressure measuring joint 204 to the pressure port 208 of the mechanical pressure relay, and the pressure measuring joint 1 203 to the equipment pressure regulating joint 201, wherein the equipment pressure regulating joint 201 is provided with a pressure regulating valve to adjust the pressure source;

[0040] S4, after all the lines are connected, tighten the adjustment screw of the mechanical pressure relay to the bottom, observe that the buzzer 102 does not sound or the indicator light does not light up, and then observe whether the pressure value of the pressure gauge is consistent with the alarm value of the mechanical pressure relay and adjust it;

[0041] S5, if the pressure has not reached the alarm value or has exceeded the alarm value, slowly loosen the adjusting screw of the mechanical pressure relay. During the adjustment process, listen to the sound of the buzzer 102 or see the indicator light up. Stop loosening the adjusting screw of the mechanical pressure relay immediately after the buzzer 102 sounds or the indicator light up, or both signals are sent out at the same time;

[0042] S6, after the pressure regulating valve at the pressure regulating joint 201 of the regulating equipment releases pressure until the buzzer 102 sound and the light signal all disappear, slowly adjust the pressure regulating valve again to slowly increase the pressure, while increasing the pressure, listen to the buzzer 102 sound or see the indicator light, and stop adjusting the pressure regulating valve immediately after the buzzer sound or the light is turned on, or both signals are sent out at the same time. At this time, the buzzer 102 sound and the light are on, which means that the PLC has received the alarm value signal sent by the mechanical pressure relay, and then observe whether the value displayed in the pressure gauge 209 is consistent with the alarm value required to be set by the mechanical pressure relay;

[0043] S7. If the value observed on the pressure gauge is slightly higher than the alarm value required to be set for the mechanical pressure relay, slightly loosen the adjusting screw of the mechanical pressure relay and then perform another debugging according to the steps in S6 above. If the value observed on the pressure gauge is slightly lower than the alarm value required to be set for the mechanical pressure relay, slightly tighten the adjusting screw of the mechanical pressure relay and then perform another debugging according to the steps in S6 above.

[0044] S8, follow the debugging steps in S6 to finally verify that the value displayed on the pressure gauge is consistent with the alarm value signal set by the mechanical pressure relay.

[0045] S9, remove the quick plug 104 used for debugging the mechanical pressure relay, and then plug in the permanent plug of the mechanical pressure relay to observe whether the signal of the PLC module is received. If the signal of the PLC module is received, it proves that the line between the permanent plug and the PLC module and the PLC module are fine. If the signal is always received after the pressure is increased to 10MPa, replace the spare line or replace the spare point in the PLC module.

[0046] S10, calibrate the pressure of the pressure regulating valve at the equipment pressure regulating joint 201 to the design pressure. After the pressure regulating valve is calibrated to the design pressure, the overpressure or underpressure signal of the mechanical pressure relay will disappear, which means that the system pressure is normal and is not higher or lower than the design pressure. At the same time, remove one end of the pressure measuring hose at the pressure measuring joint 1 203, then remove one end of the pressure measuring hose at the pressure measuring joint 2 204, and finally connect the pressure port 208 of the mechanical pressure relay to the equipment pressure regulating joint 201. The overpressure alarm debugging of the mechanical pressure relay is completed.

[0047] The underpressure alarm debugging method is opposite to the overpressure alarm debugging method, and includes the following steps:

[0048] S1, self-check the mechanical pressure relay debugging device, mainly use the electrical detection switch 103 to detect whether the battery 101 is low and whether the buzzer 102 is working normally. If the detection is normal, turn off the electrical detection switch 103, and at the same time check whether the pressure gauge 1 209 and the pressure gauge 2 210 are at the 0 position. If not, disassemble the pressure measuring joint 3 205 and the pressure measuring joint 4 206, and observe again whether they are at the 0 position. If they are at the 0 position, it proves that the pressure gauge is normal. If not, replace the pressure gauge with a new one.

[0049] S2, remove the permanent plug of the mechanical pressure relay, then plug in the quick plug 104 of the signal detection device 1, and switch the three-way ball valve 207 to the pressure gauge 2 210;

[0050] S3, connect the pressure measuring joint 204 to the pressure port 208 of the mechanical pressure relay, and connect the pressure measuring joint 1 203 to the equipment pressure regulating joint 201. The equipment pressure regulating joint 201 is provided with a pressure regulating valve to adjust the pressure source;

[0051] S4, after all the lines are connected, loosen the adjustment screw of the mechanical pressure relay to the bottom, observe the buzzer 102 sounds or the indicator light turns on, and then observe whether the pressure value of the pressure gauge is consistent with the alarm value of the mechanical pressure relay;

[0052] S5, if the pressure has not reached the alarm value or has exceeded the alarm value, slowly tighten the adjusting screw of the mechanical pressure relay. During the adjustment process, observe whether the buzzer 102 sound disappears or the indicator light goes out. When either the buzzer 102 sound disappears or the indicator light goes out, or both signals are sent out at the same time, stop tightening the adjusting screw of the mechanical pressure relay immediately.

[0053] S6, after debugging is completed, the pressure regulating valve at the pressure regulating joint 201 of the regulating equipment is increased until the buzzer 102 sounds or the indicator light turns on, and the pressure regulating valve is slowly adjusted again to slowly release the pressure. While releasing the pressure, listen to the buzzer 102 disappear or the indicator light turns off. When either the buzzer sound disappears or the indicator light turns off, stop adjusting the pressure regulating valve immediately. At this time, the buzzer 102 disappears and the light turns off, indicating that the PLC receives the alarm value signal from the mechanical pressure relay. Then observe whether the value displayed in the pressure gauge 210 is consistent with the alarm value required to be set by the mechanical pressure relay.

[0054] S7. If the value observed on the pressure gauge is slightly higher than the alarm value required to be set for the mechanical pressure relay, slightly loosen the adjusting screw of the mechanical pressure relay and then perform another debugging according to the steps in S6 above. If the value observed on the pressure gauge is slightly lower than the alarm value required to be set for the mechanical pressure relay, slightly tighten the adjusting screw of the mechanical pressure relay and then perform another debugging according to the steps in S6 above.

[0055] S8, follow the debugging steps in S6 to finally verify that the value displayed on the pressure gauge is consistent with the alarm value signal set by the mechanical pressure relay.

[0056] S9, remove the quick plug 104 used for debugging the mechanical pressure relay, and then plug in the permanent plug of the mechanical pressure relay to observe whether the signal of the PLC module is received. If the signal of the PLC module is received, it proves that the line between the permanent plug and the PLC module and the PLC module are fine. If the signal is always received after the pressure is increased to 10MPa, replace the spare line or replace the spare point in the PLC module.

[0057] S10, calibrate the pressure of the pressure regulating valve at the equipment pressure regulating joint 201 to the design pressure. After the pressure regulating valve is calibrated to the design pressure, the overpressure or underpressure signal of the mechanical pressure relay will disappear, which means that the system pressure is normal and is not higher or lower than the design pressure. At the same time, remove one end of the pressure hose at the pressure measuring joint 1 203, then remove one end of the pressure hose at the pressure measuring joint 2 204, and finally connect the pressure port 208 of the mechanical pressure relay to the equipment pressure regulating joint 201. The alarm debugging of the mechanical pressure relay is completed.

[0058] The advantages of using the method of the present invention are: saving time and labor, being convenient and fast.

[0059] 1. If the convenient debugging device patent is not used, it takes 30-60 minutes to adjust the mechanical pressure relay. After using this patent, the time can be shortened to 10-15 minutes;

[0060] 2. After using this invention patent, the original debugging process that required more than three people can be optimized to one person (originally one person needed to observe the signal point in real time in the PLC cabinet, and then when one person was adjusting the mechanical relay, another person had to communicate with the other person using an intercom, or when one person was adjusting the mechanical relay, multiple people had to shout and use sign language to convey information);

[0061] 3. The alarm value of the mechanical pressure relay adjusted by intercom communication or multiple people shouting and hand language information transmission has a large error;

[0062] 4. When you want to check whether the alarm value of the mechanical pressure relay is accurate after using it for one year or many years, this patented invention can be used as an offline inspection device.

[0063] Finally, it should be noted that the above implementation modes are only used to illustrate the present invention rather than to limit it. The present invention is described in detail with reference to the preferred implementation modes. At the same time, the devices and mechanisms not described in detail in the embodiment scheme of the present invention are all prior art. Ordinary technicians in this field should understand that any modifications or equivalent substitutions made to the present invention without creative thinking should be covered within the scope of the claims of the present invention.

Claims

1. A convenient debugging device for mechanical pressure relay, It is characterized in that The device comprises a signal detection device (1) and a pressure supply and pressure measuring device (2), wherein the signal detection device (1) comprises a battery (101), the battery (101) is connected to a quick plug (104) via two power connection lines, one of which is provided with a buzzer (102), the pressure supply and pressure measuring device (2) comprises an equipment pressure regulating joint (201), the equipment pressure regulating joint (201) is connected to one of the joints of a tee (202) via a pressure measuring joint 1 (203), the second joint of the tee (202) is connected to a pressure port (208) of a mechanical pressure relay via a pressure measuring joint 2 (204), the last joint of the tee (202) is connected to a pressure gauge, and the pressure supply and pressure measuring device (2) are both connected using a pressure measuring hose; In the pressure supply and pressure measuring device (2), the last joint of the three-way (202) is connected to a three-way ball valve (207), one of the joints of the three-way ball valve (207) is connected to a pressure gauge one (209) via a pressure measuring joint three (205), and the last joint of the three-way ball valve (207) is connected to a pressure gauge two (210) via a pressure measuring joint four (206); The pressure gauge 1 (209) and the pressure gauge 2 (210) are respectively a high pressure gauge and a low pressure gauge; A method for conveniently debugging a device using a mechanical pressure relay comprises the following steps; S1, self-check the mechanical pressure relay debugging device; S2, remove the permanent plug of the mechanical pressure relay, and then plug in the quick plug (104) of the signal detection device (1), select the pressure gauge according to whether the overpressure alarm or the underpressure alarm is to be adjusted, select pressure gauge 1 (209) for adjusting the overpressure alarm, and select pressure gauge 2 (210) for adjusting the underpressure alarm; S3, connecting the second pressure measuring joint (204) to the pressure port (208) of the mechanical pressure relay, and connecting the first pressure measuring joint (203) to the equipment pressure regulating joint (201), wherein a pressure regulating valve is provided in the equipment pressure regulating joint (201) to adjust the pressure source; S4. After all the lines are connected, adjust the adjustment screw of the mechanical pressure relay, observe the sound of the buzzer (102) or the indicator light, and then observe whether the pressure value of the pressure gauge is consistent with the alarm value of the mechanical pressure relay. The overpressure alarm debugging requires that the adjusting screw be tightened to the bottom and the buzzer (102) be observed to stop sounding or the indicator light be turned off; the underpressure alarm debugging requires that the adjusting screw be loosened to the bottom and the buzzer (102) be observed to start sounding or the indicator light be turned on; S5, if the pressure value observed in the pressure gauge is different from the pressure of the alarm value, if the pressure has not reached the alarm value or has exceeded the alarm value, the pressure regulating valve at the pressure regulating joint (201) of the equipment can be used to increase or reduce the pressure to the alarm value required by the mechanical pressure relay, and then the adjusting screw of the mechanical pressure relay can be slowly adjusted, and the signal change of the buzzer (102) can be observed. If the signal changes, the adjusting screw can be stopped immediately; S6, after debugging is completed, adjust the pressure regulating valve at the pressure regulating joint (201) of the equipment again, and observe the signal of the buzzer (102) during the adjustment process. After the signal changes, adjust the pressure regulating valve in the opposite direction. When the buzzer (102) signal changes again, stop adjusting. This means that the PLC has received the signal. Then observe whether the data in the pressure gauge is consistent with the set alarm value. S7, if the value observed on the pressure gauge is slightly higher than the alarm value required to be set for the mechanical pressure relay, slightly loosen the adjusting screw of the mechanical pressure relay and then debug again according to the steps in S6 above; if the value observed on the pressure gauge is slightly lower than the alarm value required to be set for the mechanical pressure relay, slightly tighten the adjusting screw of the mechanical pressure relay and then debug again according to the steps in S6 above; S8, follow the debugging steps in S6 to finally verify that the value displayed on the pressure gauge is consistent with the alarm value signal set by the mechanical pressure relay; S9, remove the quick plug (104) used for debugging the mechanical pressure relay, and then plug in the permanent plug of the mechanical pressure relay to observe whether the signal of the PLC module is received. If the signal of the PLC module is received, it proves that the line between the permanent plug and the PLC module and the PLC module are fine. If the signal of the PLC module is not received when the pressure is increased to 10MPa, replace the spare line or replace the spare point in the PLC module. S10, calibrate the pressure of the pressure regulating valve at the equipment pressure regulating joint (201) to the design pressure. After the pressure regulating valve is calibrated to the design pressure, the overpressure or underpressure signal of the mechanical pressure relay will disappear, which means that the system pressure is normal and is neither higher nor lower than the design pressure. At the same time, remove one end of the pressure measuring hose at the pressure measuring joint 1 (203), then remove one end of the pressure measuring hose at the pressure measuring joint 2 (204), and finally connect the pressure port (208) of the mechanical pressure relay to the equipment pressure regulating joint (201). The alarm debugging of the mechanical pressure relay is completed.

2. A convenient debugging device for a mechanical pressure relay according to claim 1, It is characterized in that In the signal detection device (1), an electrical detection switch (103) is connected between the two power connection lines, and the electrical detection switch (103) is arranged between the buzzer (102) and the quick plug (104).

3. A convenient debugging device for a mechanical pressure relay according to claim 1, It is characterized in that The buzzer (102) is provided with an indicator light.

4. A convenient debugging device for a mechanical pressure relay according to claim 1, It is characterized in that The self-check in step S1 includes using the electrical detection switch (103) to detect whether the battery (101) is low on power and whether the buzzer (102) is working properly, and also includes detecting whether the pressure gauge 1 (209) and the pressure gauge 2 (210) are at the 0 position.

5. A convenient debugging device for a mechanical pressure relay according to claim 1, It is characterized in that In step S5, the overpressure alarm debugging requires slowly loosening the mechanical pressure relay adjusting screw, and during the adjustment process, the sound of the buzzer (102) is heard or the indicator light is seen, and the loosening of the mechanical pressure relay adjusting screw is stopped immediately after the buzzer (102) sounds or the light turns on, or both signals are sent simultaneously. The underpressure alarm debugging requires slowly tightening the mechanical pressure relay adjusting screw, and during the adjustment process, the sound of the buzzer (102) disappears or the indicator light turns off, and the tightening of the mechanical pressure relay adjusting screw is stopped immediately after the buzzer (102) disappears or the light turns off, or both signals are sent simultaneously.

6. A convenient debugging device for a mechanical pressure relay according to claim 5, It is characterized in that In step S6, the overpressure alarm debugging requires adjusting the pressure regulating valve at the pressure regulating joint (201) of the equipment again to release the pressure until the buzzer (102) sound and the light signal disappear completely, and then slowly adjusting the pressure regulating valve again to slowly increase the pressure. While increasing the pressure, listen to the buzzer (102) sound or see the indicator light. When either the buzzer sound or the light turns on or both signals are sent out, stop adjusting the pressure regulating valve immediately. At this time, the buzzer (102) sound and the light turns on indicate that the PLC has received the alarm value signal sent by the mechanical pressure relay. Then observe whether the value displayed in the pressure gauge 1 (209) is consistent with the alarm value required to be set by the mechanical pressure relay. The decompression alarm debugging requires re-adjusting the pressure regulating valve at the pressure regulating joint (201) of the equipment to increase the pressure until the buzzer (102) sounds or the indicator light comes on, and then slowly adjusting the pressure regulating valve to slowly release the pressure. While releasing the pressure, listen for the buzzer (102) to disappear or the indicator light to go out. When either the buzzer sound disappears or the indicator light goes out, or both signals are sent out at the same time, stop adjusting the pressure regulating valve immediately. At this time, the buzzer (102) disappears and the light goes out, indicating that the PLC has received the alarm value signal from the mechanical pressure relay. Then observe whether the value displayed in the pressure gauge 2 (210) is consistent with the alarm value required to be set by the mechanical pressure relay.

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