Intelligent automatic adjusting electric pressure measuring system

Abstract

The utility model discloses an intelligent automatic adjusting electric pressure measuring system which comprises a liquid inlet, a driving motor, an electric pump, a first valve, a pressure measuring port, a second valve, a pressure relief port, a liquid inlet main path, a pressure measuring main path and a pressure relief liquid path. The system further comprises a pressure transmitter and a pressure controller, the pressure transmitter is arranged on the pressure measuring main path, the pressure transmitter is used for detecting the pressure in the pressure measuring main path, the pressure transmitter is in communication connection with the pressure controller, and the pressure controller is in communication connection with the first valve and the driving motor. According to the utility model, the telecom control mode can significantly improve the timeliness of closing the driving motor, thereby improving the precision of the pressure test. In addition, the opening degree of the first valve is controlled to be reduced when the preset pressure value is close. In this way, when the pressure controller controls the driving motor to be closed, the pressure in the pressure measuring main path is only slightly increased, and therefore it is further ensured that the pressure of the pressure measuring opening is the preset pressure value.

Description

Technical Field

[0001] The utility model relates to the technical field of voltage regulation control, and more specifically to an intelligent and automatically adjustable electric pressure measuring system. Background Art

[0002] In order to ensure the safety and reliability of high-pressure components or equipment, the components or equipment must undergo pressure testing before leaving the factory or after installation, and can only be used after passing the test. In the prior art, pressure testing is performed on high-pressure components or equipment through a pressure measuring system. The pressure measuring system mainly includes a drive motor, an electric pump, a pressure gauge device, a pressure measuring port, and a pressure relief port. The drive motor is used to drive the electric pump, and the pressure in the hydraulic circuit begins to increase after the drive motor is turned on. The pressure gauge device is used to measure the pressure value in the hydraulic circuit. The component or equipment to be tested is connected to the pressure measuring port. When the operator observes that the pressure value in the hydraulic circuit has risen to the preset pressure value through the pressure gauge device, the operator turns off the drive motor through the drive motor stop button to stop the electric pump. After the pressure test of the component or equipment is completed, the pressure relief port is opened to release the hydraulic pressure in the hydraulic circuit.

[0003] However, from the time the operator observes through the pressure gauge that the pressure value in the hydraulic circuit reaches the preset pressure value to the time the drive motor is manually turned off, the electric pump is in operation. Therefore, when the operator manually turns off the drive motor, the pressure value in the hydraulic circuit has exceeded the preset pressure value, making it impossible for the component or equipment to complete the pressure test at the preset pressure value, reducing the accuracy and test efficiency of the pressure test.

[0004] Therefore, how to improve the test accuracy and test efficiency of the pressure measurement system is a key issue that needs to be urgently solved by technical personnel in this field. Utility Model Content

[0005] The purpose of the utility model is to improve the test accuracy and test efficiency of the pressure measurement system. To achieve the above purpose, the utility model provides the following technical solutions:

[0006] An intelligent and automatically adjustable electric pressure measuring system comprises a liquid inlet, a driving motor, an electric pump, a first valve, a pressure measuring port, a second valve, a pressure relief port, a liquid inlet main path, a pressure measuring main path and a pressure relief liquid path;

[0007] The driving motor is used to drive the electric pump, the inlet of the electric pump is connected to the liquid inlet, the outlet of the electric pump is connected to the inlet of the liquid inlet main path, the first valve is arranged on the liquid inlet main path, the outlet of the liquid inlet main path forms a three-way structure with one port of the pressure measuring main path and the inlet of the pressure relief liquid path, the other port of the pressure measuring main path is connected to the pressure measuring port, the outlet of the pressure relief liquid path is connected to the pressure relief port, and the second valve is arranged on the pressure relief liquid path;

[0008] It also includes a pressure transmitter and a pressure controller, wherein the pressure transmitter is arranged on the pressure measuring main circuit, the pressure transmitter is used to detect the pressure in the pressure measuring main circuit, the pressure transmitter is communicatively connected to the pressure controller, the pressure controller is communicatively connected to the first valve, the pressure controller can control the opening of the first valve, the pressure controller is communicatively connected to the drive motor, and the pressure controller can control the start and stop of the drive motor.

[0009] Preferably, the first valve comprises a first needle valve and a first servo motor, the motor shaft of the first servo motor is connected to a hand wheel of the first needle valve, and the pressure controller is communicatively connected to the first servo motor.

[0010] Preferably, a second needle valve is provided on a pressure measuring branch line connecting the other port of the pressure measuring main line and the pressure measuring port.

[0011] Preferably, the pressure measuring branches are multiple and arranged in parallel, each of the pressure measuring branches is provided with a second needle valve, and each of the pressure measuring branches corresponds to a pressure measuring port.

[0012] Preferably, the electric pressure measuring system further comprises a pressure gauge device, and the pressure gauge device comprises a low-pressure pressure gauge, a high-pressure pressure gauge, a mechanical pressure recorder, a third needle valve and a fourth needle valve;

[0013] The outlet of the main liquid inlet passage is communicated with the first port of the third needle valve, the second port of the third needle valve is communicated with the liquid port of the low-pressure pressure gauge, and the liquid port of the low-pressure pressure gauge is also communicated with the low-pressure port of the mechanical pressure recorder;

[0014] The first port and the second port of the fourth needle valve are used to open or close the main pressure measuring circuit. The third port of the fourth needle valve is connected to the liquid port of the high-pressure pressure gauge, and the liquid port of the high-pressure pressure gauge is also connected to the high-pressure port of the mechanical pressure recorder.

[0015] Preferably, the third needle valve is a three-way valve, the third port of the third needle valve is communicated with the inlet of the first safety valve, and the outlet of the first safety valve is communicated with the drain port.

[0016] Preferably, the second valve comprises a fifth needle valve and a sixth needle valve arranged in series, and also comprises a second servo motor, the hand wheel of the sixth needle valve is connected to the motor shaft of the second servo motor, and the second servo motor is communicatively connected to the pressure controller.

[0017] Preferably, it further comprises a high-pressure filter and a seventh needle valve, wherein the high-pressure filter is arranged on the pressure relief fluid path, the high-pressure filter is located upstream of the second valve, and the seventh needle valve is arranged in parallel with the high-pressure filter.

[0018] Preferably, a one-way valve is provided on the main liquid inlet path.

[0019] Preferably, a ball valve and a water filter are sequentially arranged between the liquid inlet and the electric pump;

[0020] The liquid inlet is communicated with the inlet of the ball valve, the outlet of the ball valve is communicated with the inlet of the water filter, and the outlet of the water filter is communicated with the inlet of the electric pump.

[0021] It can be seen from the above technical scheme that: in the present utility model, if the pressure controller determines that the pressure in the pressure measuring main circuit has reached the preset pressure value, the pressure controller will control the drive motor to turn off and immediately stop the boost of the electric pump. Compared with the scheme in the prior art in which the operator observes that the pressure value in the pressure measuring main circuit has risen to the preset pressure value and then turns off the drive motor, the telecommunication control method in the present utility model can significantly improve the timeliness of turning off the drive motor, thereby ensuring that the pressure measuring main circuit, or the pressure measuring port, has a preset pressure value, thereby improving the accuracy of the pressure test. In addition, during the boosting process, the pressure controller can also calculate whether the pressure in the pressure measuring main circuit is close to the preset pressure value. If it is close to the preset pressure value, the pressure controller controls the opening of the first valve to decrease and reduce the boosting speed. In this way, when the pressure controller detects that the pressure in the pressure measuring main circuit has reached the preset pressure value and controls the drive motor to turn off, the pressure in the pressure measuring main circuit will only increase slightly, thereby further ensuring that the pressure at the pressure measuring port is the preset pressure value and further improving the pressure measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the scheme in the embodiment of the utility model, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings in the following description are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 The present invention is a schematic diagram of an intelligent and automatically adjustable electric pressure measuring system according to a specific embodiment of the present invention.

[0024] Among them, 1-drive motor, 2-electric pump, 3-first valve, 301-first needle valve, 302-first servo motor, 4-second valve, 401-fifth needle valve, 402-sixth needle valve, 403-second servo motor, 5-liquid inlet main line, 6-pressure measuring main line, 7-pressure relief liquid line, 8-pressure transmitter, 9-pressure controller, 10-pressure measuring branch line, 11-second needle valve, 12-pressure gauge device, 1201-third needle valve, 1202-low pressure gauge, 1203-mechanical pressure recorder, 1204-high pressure gauge, 1205-fourth needle valve, 13-high pressure filter, 14-seventh needle valve, 15-check valve, 16-first safety valve, 17-second safety valve, 18-ball valve, 19-water filter, 20-pressure gauge. DETAILED DESCRIPTION

[0025] The utility model discloses an intelligent and automatically adjustable electric pressure measuring system, which has high testing accuracy and testing efficiency.

[0026] 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 of 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.

[0027] Please refer to the attached Figure 1 The utility model discloses an intelligent automatic regulating electric pressure measuring system, which includes: a liquid inlet, a driving motor 1, an electric pump 2, a first valve 3, a pressure measuring port, a second valve 4, a pressure relief port, a liquid inlet main path 5, a pressure measuring main path 6 and a pressure relief liquid path 7.

[0028] The driving motor 1 drives the electric pump 2 through the crankshaft. The inlet of the electric pump 2 is connected to the liquid inlet, and the outlet of the electric pump 2 is connected to the inlet of the liquid inlet main path 5. The first valve 3 is arranged on the liquid inlet main path 5.

[0029] The outlet of the main liquid inlet circuit 5, one port of the main pressure measuring circuit 6 and the inlet of the pressure relief liquid circuit 7 form a three-way structure. The main liquid inlet circuit 5 can be connected to the main pressure measuring circuit 6 to achieve pressure boost. The main pressure measuring circuit 6 can also be connected to the pressure relief liquid circuit 7 to achieve pressure relief. The other port of the main pressure measuring circuit 6 is connected to the pressure measuring port. The outlet of the pressure relief liquid circuit 7 is connected to the pressure relief port. The second valve 4 is arranged on the pressure relief liquid circuit 7, and is used to control the conduction and cutoff of the pressure relief liquid circuit 7. When the second valve 4 is opened, the main pressure measuring circuit 6 will be connected to the pressure relief liquid circuit 7, and the pressure measuring main circuit 6 will relieve pressure through the pressure relief liquid circuit 7.

[0030] The intelligent automatic regulating electric pressure measuring system in the utility model also includes a pressure transmitter 8 and a pressure controller 9. The pressure transmitter 8 is arranged on the pressure measuring main circuit 6, and is used to detect the pressure in the pressure measuring main circuit 6, and the pressure in the pressure measuring main circuit 6 is the liquid pressure of the pressure measuring port. The pressure transmitter 8 is connected in communication with the pressure controller 9. The pressure controller 9 is connected in communication with the first valve 3, and the pressure controller 9 is connected in communication with the drive motor 1.

[0031] The pressure transmitter 8 continuously transmits the detected pressure value to the pressure controller 9. After receiving the pressure value transmitted by the pressure transmitter 8, the pressure controller 9 makes a judgment. If the pressure controller 9 judges that the pressure in the pressure measuring main circuit 6 has reached the preset pressure value, the pressure controller 9 controls the driving motor 1 to stop rotating. Specifically, the pressure controller 9 can control the power supply and power off of the driving motor 1, thereby realizing the start and stop control of the driving motor 1.

[0032] In addition, the pressure controller 9 can also calculate the pressure increase speed of the pressure in the pressure measuring main circuit 6. If the pressure controller 9 determines that the pressure increase speed in the pressure measuring main circuit 6 is lower than the preset speed, the pressure controller 9 controls the opening of the first valve 3 to be opened wider. If the pressure controller 9 determines that the pressure increase speed in the pressure measuring main circuit 6 is higher than the preset speed, the pressure controller 9 controls the opening of the first valve 3 to be reduced.

[0033] In the present invention, if the pressure controller 9 determines that the pressure in the pressure measuring main circuit 6 reaches the preset pressure value, the pressure controller 9 will control the drive motor 1 to shut down and immediately stop the boosting of the electric pump 2. Compared with the solution in the prior art that the operator observes that the pressure value in the pressure measuring main circuit 6 rises to the preset pressure value and then shuts down the drive motor 1, the telecommunication control method in the present invention can significantly improve the timeliness of shutting down the drive motor 1, thereby ensuring that the pressure measuring main circuit 6, or the pressure measuring port, has a preset pressure value, thereby improving the accuracy of the pressure test. In addition, during the boosting process, the pressure controller 9 can also calculate whether the pressure in the pressure measuring main circuit 6 is close to the preset pressure value. If it is close to the preset pressure value, the pressure controller 9 controls the opening of the first valve 3 to decrease and reduce the boosting speed. In this way, when the pressure controller 9 detects that the pressure in the pressure measuring main circuit 6 reaches the preset pressure value and controls the drive motor 1 to shut down, the pressure in the pressure measuring main circuit 6 will only increase slightly, thereby further ensuring that the pressure of the pressure measuring port is the preset pressure value and further improving the pressure measurement accuracy.

[0034] The first valve 3 in the utility model specifically includes a first needle valve 301 and a first servo motor 302, and the motor shaft of the first servo motor 302 is connected to the hand wheel of the first needle valve 301. The pressure controller 9 is connected to the first servo motor 302. If the boost speed is to be increased, the first servo motor 302 is controlled by the pressure controller 9 to rotate in the first direction to increase the opening of the first needle valve 301. If the boost speed is to be reduced, the first servo motor 302 is controlled by the pressure controller 9 to rotate in the second direction to reduce the opening of the first needle valve 301. The servo motor has the advantages of being easy to control and having high precision. The needle valve is conducive to the regulation of the flow rate of the liquid path.

[0035] A second needle valve 11 is provided on the pressure measuring branch 10 connecting the other port of the pressure measuring main circuit 6 and the pressure measuring port. The first needle valve 301 can automatically adjust the pressure increasing speed and pressure reducing speed of the pressure measuring main circuit 6, or the pressure measuring port. The second needle valve 11 can further adjust the pressure increasing speed and pressure reducing speed of the pressure measuring port manually, and the pressure measuring port can also be closed by the second needle valve 11.

[0036] There are multiple pressure testing branches 10 connected in parallel, each of which is provided with a second needle valve 11, and the end of each pressure testing branch 10 corresponds to a pressure testing port. In this way, pressure testing can be performed on multiple devices at the same time, thereby improving the efficiency of pressure testing. Figure 1 There are two pressure measuring branches 10, each of which is provided with a second needle valve 11, and each of which corresponds to a pressure measuring port. Therefore, the electric pressure measuring system in this embodiment includes two pressure measuring ports, and can perform pressure tests on two devices or two components at the same time.

[0037] The electric pressure measuring system further includes a pressure gauge device 12 , which includes: a low-pressure pressure gauge 1202 , a high-pressure pressure gauge 1204 , a mechanical pressure recorder 1203 , a third needle valve 1201 , and a fourth needle valve 1205 .

[0038] The outlet of the main liquid inlet path 5 is connected to the first port of the third needle valve 1201, and the second port of the third needle valve 1201 is connected to the liquid port of the low-pressure pressure gauge 1202, and the liquid port of the low-pressure pressure gauge 1202 is also connected to the low-pressure port of the mechanical pressure recorder 1203. It can be seen from the above description that the outlet of the main liquid inlet path 5, a port of the pressure measuring main path 6, and the inlet of the pressure relief liquid path 7 form a three-way structure. In this embodiment, the specific way in which the first port of the third needle valve 1201 is connected to the outlet of the main liquid inlet path 5 can be: a section of liquid path is drawn from the first port of the third needle valve 1201 and connected to the pressure relief liquid path 7. When the third needle valve 1201 is turned on, the liquid from the main liquid inlet path 5 enters the pressure relief liquid path 7 after passing through the outlet of the main liquid inlet path 5, and then enters the third needle valve 1201 through the section of liquid path, and flows through the low-pressure pressure gauge 1202 and the mechanical pressure recorder 1203 in sequence.

[0039] The fourth needle valve 1205 is disposed in the pressure measuring main circuit 6, and the first port and the second port of the fourth needle valve 1205 are used to conduct or cut off the pressure measuring main circuit 6. The third port of the fourth needle valve 1205 is connected to the liquid port of the high pressure gauge 1204, and the liquid port of the high pressure gauge 1204 is also connected to the high pressure port of the mechanical pressure recorder 1203.

[0040] After the drive motor 1 is turned on, the pressure in the liquid circuit begins to increase. When the pressure in the liquid circuit is low pressure, the third needle valve 1201 is opened to connect the first port and the second port of the third needle valve 1201. The liquid in the main liquid inlet path 5 flows out from the outlet of the main liquid inlet path 5 to form two streams, one of which enters the pressure relief liquid circuit 7, and then enters the third needle valve 1201 through a section of the liquid circuit, and flows through the low-pressure pressure gauge 1202 and the mechanical pressure recorder 1203 in turn. The low-pressure pressure gauge 1202 reflects the pressure value in the liquid circuit. The mechanical pressure recorder 1203 records the pressure change in the liquid circuit at low pressure. The other stream passes through the first port and the second port of the fourth needle valve 1205 and then flows through the liquid port of the pressure transmitter 8, the two second needle valves 11, and finally enters the two devices to be tested through the two pressure measuring ports.

[0041] When the pressure in the liquid circuit rises to high pressure, the third needle valve 1201 is closed to prevent the high-pressure liquid in the main liquid inlet circuit 5 from flowing into the low-pressure pressure gauge 1202 and the low-pressure port of the mechanical pressure recorder 1203, so as to prevent the high-pressure liquid from impacting the low-pressure pressure gauge 1202 and the low-pressure port of the mechanical pressure recorder 1203. A part of the high-pressure liquid flowing out of the outlet of the main liquid inlet circuit 5 passes through the first port and the third port of the fourth needle valve 1205 and then flows through the liquid port of the high-pressure pressure gauge 1204 and the high-pressure port of the mechanical pressure recorder 1203 in sequence. The high-pressure pressure gauge 1204 is used to display the pressure value of the liquid circuit. The mechanical pressure recorder 1203 is used to record the change of the liquid pressure in the liquid circuit.

[0042] The fourth needle valve 1205 is a three-way valve, and the third needle valve 1201 is also a three-way valve. The third port of the third needle valve 1201 is connected to the inlet of the first safety valve 16, and the outlet of the first safety valve 16 is connected to the drain port. When the pressure flowing through the third needle valve 1201 is too high, the pressure will be relieved through the third port of the third needle valve 1201 and the first safety valve 16.

[0043] It can be seen from the above description that the second valve 4 is provided on the pressure relief fluid circuit 7, and the second valve 4 is used to conduct or cut off the pressure relief fluid circuit 7. In a specific embodiment of the utility model, the second valve 4 includes a fifth needle valve 401 and a sixth needle valve 402 arranged in series, and also includes a second servo motor 403. The hand wheel of the sixth needle valve 402 is connected to the motor shaft of the second servo motor 403, and the second servo motor 403 is connected to the pressure controller 9 in communication, that is, the sixth needle valve 402 is automatically controlled.

[0044] In the pressure-increasing stage, the fifth needle valve 401 and the sixth needle valve 402 are in the cut-off state, and the pressure relief liquid circuit 7 is not connected, that is, the liquid circuit system does not relieve pressure. As the drive motor 1 runs, the pressure of the liquid circuit system, that is, the pressure at the pressure measuring port, gradually increases. When the pressure measurement is completed, the pressure of the liquid circuit system needs to be relieved. At this time, the fifth needle valve 401 and the sixth needle valve 402 are opened, and the high-pressure liquid in the pressure measuring main circuit 6 and the pressure-measured device will be relieved through the pressure relief liquid circuit 7.

[0045] In the present invention, a preset pressure relief speed can be input in advance into the pressure controller 9. During the pressure relief process, the pressure controller 9 will continuously receive the pressure signal sent by the pressure transmitter 8 and calculate the pressure relief speed. If the pressure relief speed is higher than the preset pressure relief speed, the pressure controller 9 controls the second servo motor 403 to rotate in one direction to reduce the opening of the sixth needle valve 402, thereby reducing the pressure relief speed so that the pressure relief speed reaches the preset pressure relief speed. If the pressure relief speed is lower than the preset pressure relief speed, the pressure controller 9 controls the second servo motor 403 to rotate in another direction to increase the opening of the sixth needle valve 402, thereby speeding up the pressure relief speed so that the pressure relief speed reaches the preset pressure relief speed.

[0046] The pressure transmitter 8, the pressure controller 9, the sixth needle valve 402 and the second servo motor 403 of the utility model can automatically adjust the pressure relief speed to automatically adjust the pressure relief speed to the preset pressure relief speed to ensure that the fluid system can be slowly relieved at a stable pressure and speed. The fifth needle valve 401 is a manual valve. When the sixth needle valve 402 cannot be automatically adjusted to the preset pressure relief speed, the opening of the fifth needle valve 401 can be manually adjusted to assist in adjusting the pressure relief speed of the fluid system to the preset pressure relief speed.

[0047] The electric pressure measuring system in the utility model further includes a high-pressure filter 13. The high-pressure filter 13 is arranged on the pressure relief liquid path 7, and the high-pressure filter 13 is arranged upstream of the second valve 4, or the fifth needle valve 401. In the process of pressure relief, the liquid is first filtered by the high-pressure filter 13, and then flows through the fifth needle valve 401 and the sixth needle valve 402, so that impurities in the liquid can be effectively prevented from clogging the fifth needle valve 401 and the sixth needle valve 402.

[0048] In order to ensure that the pressure relief liquid path 7 remains unobstructed when the high-pressure filter 13 is blocked, the specific embodiment of the utility model is further provided with a seventh needle valve 14, which is arranged in parallel with the high-pressure filter 13. When the high-pressure filter 13 is blocked, the seventh needle valve 14 is opened to ensure that the pressure relief liquid path 7 remains unobstructed, thereby ensuring stable pressure relief of the liquid path system.

[0049] The utility model also provides a one-way valve 15 on the liquid inlet main path 5, which allows the liquid from the electric pump 2 to flow to the pressure measuring main path 6, but does not allow the liquid in the pressure measuring main path 6 to flow back into the liquid inlet main path 5, thereby ensuring that the liquid in the pressure measuring main path 6 and the pressure measuring branch path 10 can all flow through the pressure relief liquid path 7 for pressure relief.

[0050] The utility model sequentially arranges a ball valve 18 and a water filter 19 between the liquid inlet and the electric pump 2. The liquid inlet is communicated with the inlet of the ball valve 18, the outlet of the ball valve 18 is communicated with the inlet of the water filter 19, and the outlet of the water filter 19 is communicated with the inlet of the electric pump 2. The ball valve 18 is used to control the conduction or cutoff of the liquid path between the liquid inlet and the electric pump 2. The water filter 19 is used to filter the liquid that is about to flow into the electric pump 2 to prevent impurities in the liquid from clogging the electric pump 2. The water filter 19 is preferably a two-stage water filter 19 to ensure the filtering effect.

[0051] A pressure gauge 20 may also be provided between the ball valve 18 and the two-stage water filter 19 to detect the pressure of the liquid before entering the electric pump 2 .

[0052] In addition to being connected to the main liquid inlet path 5, the outlet of the electric pump 2 is also connected to the inlet of the second safety valve 17, and the outlet of the second safety valve 17 is connected to the liquid discharge port. When the pressure in the liquid path between the outlet of the electric pump 2 and the first needle valve 301 is too high, the pressure can be relieved through the second safety valve 17.

[0053] Finally, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0054] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0055] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An intelligent and automatically adjustable electric pressure measuring system, comprising a liquid inlet, a drive motor (1), an electric pump (2), a first valve (3), a pressure measuring port, a second valve (4), a pressure relief port, a liquid inlet main path (5), a pressure measuring main path (6) and a pressure relief liquid path (7); The driving motor (1) is used to drive the electric pump (2); the inlet of the electric pump (2) is connected to the liquid inlet; the outlet of the electric pump (2) is connected to the inlet of the liquid inlet main path (5); the first valve (3) is arranged on the liquid inlet main path (5); the outlet of the liquid inlet main path (5) forms a three-way structure with one port of the pressure measuring main path (6) and the inlet of the pressure relief liquid path (7); the other port of the pressure measuring main path (6) is connected to the pressure measuring port; the outlet of the pressure relief liquid path (7) is connected to the pressure relief port; and the second valve (4) is arranged on the pressure relief liquid path (7); It is characterized in that The invention also comprises a pressure transmitter (8) and a pressure controller (9), wherein the pressure transmitter (8) is arranged on the pressure measuring main circuit (6), and the pressure transmitter (8) is used to detect the pressure in the pressure measuring main circuit (6); the pressure transmitter (8) is connected in communication with the pressure controller (9), and the pressure controller (9) is connected in communication with the first valve (3), and the pressure controller (9) can control the opening of the first valve (3); the pressure controller (9) is connected in communication with the drive motor (1), and the pressure controller (9) can control the start and stop of the drive motor (1).

2. The intelligent automatic regulating electric pressure measuring system according to claim 1 is characterized in that: The first valve (3) comprises a first needle valve (301) and a first servo motor (302), the motor shaft of the first servo motor (302) is connected to the hand wheel of the first needle valve (301), and the pressure controller (9) is communicatively connected to the first servo motor (302).

3. The intelligent automatic regulating electric pressure measuring system according to claim 1 is characterized in that: A second needle valve (11) is provided on a pressure measuring branch line (10) connecting the other port of the pressure measuring main line (6) and the pressure measuring port.

4. The intelligent automatic regulating electric pressure measuring system according to claim 3 is characterized in that: The pressure measuring branches (10) are multiple and arranged in parallel, each of the pressure measuring branches (10) is provided with a second needle valve (11), and each of the pressure measuring branches (10) corresponds to a pressure measuring port.

5. The intelligent automatic regulating electric pressure measuring system according to claim 1 is characterized in that: The electric pressure measuring system further comprises a pressure gauge device (12), wherein the pressure gauge device (12) comprises a low-pressure pressure gauge (1202), a high-pressure pressure gauge (1204), a mechanical pressure recorder (1203), a third needle valve (1201), and a fourth needle valve (1205); The outlet of the main liquid inlet path (5) is in communication with the first port of the third needle valve (1201), the second port of the third needle valve (1201) is in communication with the liquid port of the low-pressure pressure gauge (1202), and the liquid port of the low-pressure pressure gauge (1202) is also in communication with the low-pressure port of the mechanical pressure recorder (1203); The first port and the second port of the fourth needle valve (1205) are used to open or close the pressure measuring main circuit (6); the third port of the fourth needle valve (1205) is connected to the liquid port of the high-pressure pressure gauge (1204); and the liquid port of the high-pressure pressure gauge (1204) is also connected to the high-pressure port of the mechanical pressure recorder (1203).

6. The intelligent automatic regulating electric pressure measuring system according to claim 5, characterized in that: The third needle valve (1201) is a three-way valve, the third port of the third needle valve (1201) is connected to the inlet of the first safety valve (16), and the outlet of the first safety valve (16) is connected to the drain port.

7. The intelligent automatic regulating electric pressure measuring system according to claim 1, characterized in that: The second valve (4) includes a fifth needle valve (401) and a sixth needle valve (402) arranged in series, and also includes a second servo motor (403), the hand wheel of the sixth needle valve (402) is connected to the motor shaft of the second servo motor (403), and the second servo motor (403) is communicatively connected to the pressure controller (9).

8. The intelligent automatic regulating electric pressure measuring system according to claim 1, characterized in that: It also includes a high-pressure filter (13) and a seventh needle valve (14), wherein the high-pressure filter (13) is arranged on the pressure relief fluid circuit (7), the high-pressure filter (13) is located upstream of the second valve (4), and the seventh needle valve (14) is arranged in parallel with the high-pressure filter (13).

9. The intelligent automatic regulating electric pressure measuring system according to claim 1, characterized in that: A one-way valve (15) is provided on the main liquid inlet path (5).

10. The intelligent automatic regulating electric pressure measuring system according to claim 1, characterized in that: A ball valve and a water filter are arranged in sequence between the liquid inlet and the electric pump (2); The liquid inlet is communicated with the inlet of the ball valve, the outlet of the ball valve is communicated with the inlet of the water filter, and the outlet of the water filter is communicated with the inlet of the electric pump (2).

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