Marine turbine pump monitoring system

Abstract

The invention relates to a marine turbine pump monitoring system in the field of pump equipment, which is characterized in that through a first driving mechanism, a first thermocouple performs composite motion including circular motion, lifting motion and autorotation motion, and crude oil blocks adhered to the first thermocouple are centrifugally rinsed by using flowing conveyed crude oil; the surface cleanliness of the first thermocouple is improved, a traditional manual disassembly cleaning mode is replaced, operation is simple and efficient, the maintenance level is improved, and the effective monitoring service life of the thermocouple is prolonged; meanwhile, a first electric push rod and a scraping cylinder are arranged, so that the scraping cylinder scrapes and cleans the first thermocouple moving up and down, and the cleaning effect on the first thermocouple is further improved; in addition, through the arrangement of the second thermocouple, the first thermocouple and the second thermocouple can be used alternately, the continuity of temperature monitoring is improved, the first thermocouple and the second thermocouple are inserted at the same time for troubleshooting, timely alarm and field maintenance are facilitated, and the effectiveness of monitoring is improved.

Description

Technical Field

[0001] The present invention relates to a turbine pump monitoring system, in particular to a turbine pump monitoring system for ships applied in the field of pump equipment. Background Art

[0002] Marine cargo oil turbine pumps are core equipment in ships' crude oil transportation systems. Temperature monitoring is crucial during crude oil transportation. Thermocouples, as key temperature measuring components, convert temperature differences into electrical signals through the thermoelectric effect, allowing real-time monitoring of the temperature of the crude oil flowing through the turbine pump. However, the high viscosity of crude oil can easily lead to coking or oil adhesion on the surface of the thermocouples, forming a thermal resistance layer, which in turn causes two major problems: first, thermal inertia causes a delayed temperature response, making it impossible to reflect the actual temperature in a timely manner; second, the increased thermal resistance causes the detection value to be lower than the actual temperature, which may cause the system to misjudge.

[0003] The existing patent with publication number CN108916017B discloses a marine turbine cargo oil pump fault diagnosis system, which includes a field layer unit, a ship-end management layer unit, a shore-based remote monitoring unit and a handheld fault query terminal. The field layer unit is arranged in the engine room of the oil tanker, and the ship-end management layer unit is arranged in the cargo oil control room of the oil tanker. The field layer unit and the ship-end management layer unit are connected via Ethernet communication, and the ship-end management layer unit is connected to the shore-based remote monitoring unit via wireless communication. The ship-end management layer unit is used to transmit fault detection information to the shore-based remote monitoring unit and receive fault diagnosis information fed back by the shore-based remote monitoring unit. The handheld fault query terminal is respectively communicated with the ship-end management layer unit and the shore-based remote monitoring unit. The field layer unit and the ship-end management layer unit are respectively connected to the turbine cargo oil pump PLC of the turbine cargo oil pump.

[0004] The technical solution disclosed in the above-mentioned prior art meets the monitoring requirements of multiple monitoring items of the turbine cargo oil pump and realizes the status monitoring and alarm requirements under four operating conditions of the turbine cargo oil pump, namely starting, running, tank cleaning, and shutting down. However, it does not solve the problem of misjudgment of the monitoring system caused by crude oil adhesion to the thermocouple. Summary of the Invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the thermocouple for monitoring the crude oil temperature of the turbine pump is easily adhered to the crude oil, resulting in inaccurate detection.

[0006] To solve the above-mentioned problems, the present invention provides a marine turbine pump monitoring system, comprising a pump body and a monitoring mechanism mounted at a discharge pipe of the pump body, the monitoring mechanism comprising a barrel fixedly connected to the discharge pipe of the pump body, a first thermocouple disposed within the barrel extending into the discharge pipe of the pump body; the first thermocouple penetrates a rotating disk rotatably connected to the inner wall of the barrel, a passive gear ring fixedly sleeved on the middle of the rotating disk, the passive gear ring meshing with a drive gear, the drive gear fixedly connected to the output shaft of a drive motor, and the drive motor fixedly connected to a mounting barrel fixedly connected to the outer wall of the barrel;

[0007] The upper end of the first thermocouple is connected to a first driving mechanism that drives it to rotate up and down. The first driving mechanism includes a lifting cylinder fixedly connected to the upper end of the first thermocouple, the upper end of the lifting cylinder is rotatably connected to a rotating rod, the rotating rod is fixedly connected to the movable end of the first electric push rod, the fixed end of the first electric push rod is fixedly connected to a mounting disk, and the mounting disk is fixedly connected to the rotating disk through a center rod; the lifting cylinder is fixedly sleeved with a rolling gear, and the rolling gear is engaged with a gear cylinder fixedly connected to the inner wall of the cylinder; the lower end of the first thermocouple is rotatably connected to a scraper cylinder rotatably connected to the rotating disk, and the scraper cylinder is used to scrape off crude oil blocks adhered to the surface of the first thermocouple.

[0008] In the above-mentioned marine turbine pump monitoring system, the thermocouple is automatically cleaned by the first driving mechanism and the scraper.

[0009] As a further improvement of the present application, the rotating disk is provided with a vertical cavity for the first thermocouple to pass through, and a rubber sealing sleeve is fixedly connected to the upper part of the vertical cavity, and the rubber sealing sleeve is interference fit with the first thermocouple.

[0010] As a further improvement of the present application, a horizontal cavity vertically connected to the vertical cavity is opened at the lower part of the rotating disk, and a first blocking component is provided in the horizontal cavity. The first blocking component includes a plunger slidably connected to the inner wall of the horizontal cavity, and the plunger is fixedly connected to the movable end of the second electric push rod, and the fixed end of the second electric push rod is fixedly connected to the inner wall of the horizontal cavity.

[0011] As a further improvement of the present application, the cylinder also includes a second thermocouple, the installation structure of the second thermocouple is the same as the installation structure of the first thermocouple, the second thermocouple is connected to a second drive mechanism for driving it to rotate up and down, the second drive mechanism includes a third electric push rod, and a second sealing assembly is provided on the rotating disk, and the second sealing assembly includes a fourth electric push rod; the first electric push rod, the second electric push rod, the third electric push rod, the fourth electric push rod and the drive motor are all electrically connected to the same controller.

[0012] As a further improvement of the present application, the controller is equipped with a maintenance system, which includes a control module. The input end of the control module is respectively connected to a monitoring module and a timing module, the input end of the monitoring module is respectively connected to a first thermocouple and a second thermocouple, the output end of the control module is respectively connected to a cleaning module, a detection module and an alarm module, the output ends of the cleaning module and the detection module are both connected to the first electric push rod, the second electric push rod, the third electric push rod, the fourth electric push rod and the drive motor, the output end of the alarm module is connected to an indicator light fixedly connected to the controller, and the alarm module is also connected to the computer in the remote monitoring room.

[0013] As a further improvement of the present application, the rotating disk has an I-shaped structure and an annular cavity is opened in the middle. The passive gear ring is fixed on the inner wall of the annular cavity, the driving gear is arranged in the annular cavity, the rotating disk is located on the upper and lower sides of the annular cavity and is fixedly connected with a raised ring, and an annular groove is opened on the inner wall of the cylinder to cooperate with the raised ring.

[0014] As a further improvement of the present application, the scraper cylinder has a truncated cone structure, a center hole for the first thermocouple to pass through is provided at its center position, and a plurality of evenly distributed scraping grooves connected to the center hole are provided on its circumferential side walls, and a sliding groove is provided on the inner wall of the center hole between adjacent scraping grooves, and a scraper extending into the center hole is slidably connected in the sliding groove, and the scraper is abutted against a spring sheet fixedly connected to the sliding groove.

[0015] As a further improvement of the present application, the cylinder includes a fixed cylinder fixedly connected to the discharge pipe of the pump body and a threaded cylinder threadedly connected to the fixed cylinder, and the gear cylinder is fixedly connected to the inner wall of the fixed cylinder.

[0016] To sum up, the present invention provides a first driving mechanism, so that the first thermocouple performs a composite motion including circular motion, lifting motion and rotational motion, and utilizes the flowing transported crude oil to centrifugally rinse the crude oil blocks adhered to the first thermocouple, thereby improving the cleanliness of the surface of the first thermocouple, replacing the traditional manual disassembly and cleaning method, with simple and efficient operation, improving the maintenance level and the effective monitoring life of the thermocouple; at the same time, by providing a first electric push rod and a scraper, the scraper scrapes and cleans the first thermocouple that moves up and down, further improving the cleaning effect of the first thermocouple. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the three-dimensional structure of this application;

[0018] Figure 2 This is a schematic diagram of the transverse cross-sectional structure of the present application;

[0019] Figure 3 for Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0020] Figure 4Schematic diagram of the internal structure of the cylinder in this application;

[0021] Figure 5 is a motion diagram of the first thermocouple;

[0022] Figure 6 This is a schematic cross-sectional view of the rotating disk in this application;

[0023] Figure 7 Schematic diagram of the three-dimensional structure of the scraper in this application;

[0024] Figure 8 This is a schematic diagram of the assembly structure of the scraper drum and scraper blade in this application;

[0025] Figure 9 This is a module diagram of the maintenance system in this application.

[0026] Description of the numbers in the figure:

[0027] 1. Pump body; 2. Cylinder; 201. Fixed cylinder; 202. Threaded cylinder; 3. Rotating disk; 301. Vertical cavity; 302. Horizontal cavity; 4. First thermocouple; 5. Lifting cylinder; 6. Rotating rod; 7. First electric push rod; 8. Rolling gear; 9. Gear cylinder; 10. Passive gear ring; 11. Driving gear; 12. Driving motor; 13. Mounting cylinder; 14. Rubber sealing sleeve; 15. Plunger; 16. Second electric push rod; 17. Scraper cylinder; 1701. Scraping groove; 1702. Sliding groove; 18. Scraper blade; 19. Spring sheet; 20. Mounting disk; 21. Center rod; 22. Second thermocouple; 23. Controller; 24. Indicator light. DETAILED DESCRIPTION

[0028] The following describes two implementation methods of the present application in detail with reference to the accompanying drawings.

[0029] The first implementation method:

[0030] Figure 1-8 A marine turbine pump monitoring system is shown, comprising a pump body 1 and a monitoring mechanism mounted at the pump body discharge pipe. The monitoring mechanism comprises a barrel 2 fixedly connected to the pump body discharge pipe, within which is disposed a first thermocouple 4 extending into the pump body discharge pipe. The first thermocouple 4 penetrates a rotating disk 3 rotatably connected to the inner wall of the barrel 2. A passive gear ring 10 is fixedly sleeved on the middle portion of the rotating disk 3. The passive gear ring 10 engages a drive gear 11. The drive gear 11 is fixedly connected to the output shaft of a drive motor 12. The drive motor 12 is fixedly connected to a mounting barrel 13 fixedly connected to the outer wall of the barrel 2. The drive motor 12 drives the drive gear 11 to rotate. The drive gear 11 drives the rotating disk 3 to rotate via the passive gear ring 10. The rotating disk 3 drives the first thermocouple 4 to perform a circular motion.

[0031] See also Figure 3-5, the upper end of the first thermocouple 4 is connected to a first driving mechanism that drives it to rotate up and down, and the first driving mechanism includes a lifting cylinder 5 fixedly connected to the upper end of the first thermocouple 4, the upper end of the lifting cylinder 5 is rotatably connected to a rotating rod 6, the rotating rod 6 is fixedly connected to the movable end of the first electric push rod 7, the fixed end of the first electric push rod 7 is fixedly connected to the mounting disk 20, and the mounting disk 20 is fixedly connected to the rotating disk 3 through the center rod 21; the first electric push rod 7 drives the rotating rod 6 to move up and down through the rotating rod 6, and the rotating rod 6 drives the lifting cylinder 5 and the first thermocouple 4 to move up and down; the lifting cylinder 5 is fixedly sleeved with a rolling gear 8, and the rolling gear 8 is engaged with a gear cylinder 9 fixedly connected to the inner wall of the cylinder body 2; when the lifting cylinder 5 and the first thermocouple 4 rotate in a circle, the rolling gear 8 rolls on the inner wall of the gear cylinder 9, causing the first thermocouple 4 to rotate;

[0032] See also Figure 3 The lower end of the first thermocouple 4 is rotatably connected to a scraper 17 rotatably connected to the rotating disk 3 , and the scraper 17 is used to scrape off crude oil sticking to the surface of the first thermocouple 4 .

[0033] Specifically, when it is necessary to clean the crude oil blocks stuck on the surface of the thermocouple, the drive motor 12 and the first electric push rod 7 are started, so that the first thermocouple 4 performs a composite motion of circular motion, lifting motion and rotational motion. The circular motion and rotational motion of the first thermocouple 4 are used to make the first thermocouple 4 perform a rinse action in the flowing transported crude oil to rinse and clean the stuck crude oil blocks; the lifting motion of the first thermocouple 4 and the scraper 17 are used to scrape and clean the crude oil blocks on the surface of the first thermocouple 4.

[0034] Compared with the traditional turbine pump monitoring system, the present invention is provided with a first driving mechanism, so that the first thermocouple 4 performs a composite motion including circular motion, lifting motion and rotational motion, and utilizes the flowing transported crude oil to centrifugally rinse the crude oil blocks adhering to the first thermocouple 4, thereby improving the cleanliness of the surface of the first thermocouple 4, replacing the traditional manual disassembly and cleaning method, with simple and efficient operation, improving the maintenance level and the effective monitoring life of the thermocouple; at the same time, by providing a first electric push rod 7 and a scraper 17, the scraper 17 scrapes and cleans the first thermocouple 4 moving up and down, further improving the cleaning effect of the first thermocouple 4.

[0035] See also Figure 7 and Figure 8 The scraper 17 is a truncated cone structure, with a center hole for the first thermocouple 4 to pass through at its center, and a plurality of evenly distributed scraping grooves 1701 connected to the center hole are provided on its circumferential side wall. A sliding groove 1702 is provided on the inner wall of the center hole between adjacent scraping grooves 1701, and a scraper 18 extending into the center hole is slidably connected in the sliding groove 1702, and the scraper 18 abuts against a spring sheet 19 fixedly connected to the sliding groove 1702.

[0036] Specifically, the scraping groove 1701 and the scraping blade 18 are provided to efficiently clean the first thermocouple 4 that rotates up and down, thereby improving the cleaning effect.

[0037] See also Figure 3 and Figure 6 The rotating disk 3 is provided with a vertical cavity 301 for the first thermocouple 4 to pass through. The upper part of the vertical cavity 301 is fixedly connected with a rubber sealing sleeve 14 , and the rubber sealing sleeve 14 is interference fit with the first thermocouple 4 .

[0038] Specifically, the connection position between the first thermocouple 4 and the rotating disk 3 is sealed by the rubber sealing sleeve 14 .

[0039] See also Figure 3 and Figure 6 A horizontal cavity 302 vertically connected to the vertical cavity 301 is provided at the lower part of the rotating disk 3. A first blocking component is provided in the horizontal cavity 302. The first blocking component includes a plunger 15 slidably connected to the inner wall of the horizontal cavity 302. The plunger 15 is fixedly connected to the movable end of the second electric push rod 16. The fixed end of the second electric push rod 16 is fixedly connected to the inner wall of the horizontal cavity 302. When the vertical cavity 301 needs to be blocked, the second electric push rod 16 is started to insert the plunger 15 into the vertical cavity 301 to block the vertical cavity 301.

[0040] See also Figure 3 and Figure 4 The cylinder 2 includes a fixed cylinder 201 fixedly connected to the pump body discharge pipe and a threaded cylinder 202 threadedly connected to the fixed cylinder 201, and the gear cylinder 9 is fixedly connected to the inner wall of the fixed cylinder 201.

[0041] Specifically, when the first thermocouple 4 needs to be disassembled, first, the first electric push rod 7 is started to move the lower end of the first thermocouple 4 into the rubber sealing sleeve 14; second, the second electric push rod 16 is started to make the plunger 15 seal the vertical cavity 301; the first electric push rod 7 is started again to make the first thermocouple 4 disengage from the rotating disk 3; third, the threaded barrel 202 is screwed to disassemble the exposed first thermocouple 4; the maintainability of the monitoring mechanism is improved, and it is convenient for the operator to disassemble and replace the thermocouple.

[0042] See also Figure 3 and Figure 6 The rotating disk 3 has an I-shaped structure and an annular cavity is opened in the middle. The passive gear ring 10 is fixed on the inner wall of the annular cavity. The driving gear 11 is arranged in the annular cavity. The rotating disk 3 is located on the upper and lower sides of the annular cavity and is fixedly connected with a raised ring. The inner wall of the cylinder 2 is provided with an annular groove that cooperates with the raised ring.

[0043] Specifically, the sealing performance of the connection between the rotating disk 3 and the cylinder 2 is improved by the annular cavity and the raised ring.

[0044] Second implementation method:

[0045] Figure 3-9 A turbine pump monitoring system for ships is shown. Based on the first embodiment, the cylinder 2 also includes a second thermocouple 22. The installation structure of the second thermocouple 22 is the same as the installation structure of the first thermocouple 4. The second thermocouple 22 is connected to a second drive mechanism that drives it to rotate up and down. The second drive mechanism includes a third electric push rod. A second blocking assembly is provided on the rotating disk 3. The second blocking assembly includes a fourth electric push rod; the first electric push rod 7, the second electric push rod 16, the third electric push rod, the fourth electric push rod and the drive motor 12 are all electrically connected to the same controller 23.

[0046] Specifically, by providing a second thermocouple 22, before removing the first thermocouple 4, the second thermocouple 22 is inserted into the discharge pipe of the pump body, so that the first thermocouple 4 and the second thermocouple 22 can be used alternately, which is convenient for continuous detection of the temperature of the crude oil transported by the turbine pump, realizing automatic maintenance and improving monitoring continuity; it should be noted that the rotating disk 3 is also provided with a second rubber sealing sleeve and a second scraper that cooperate with the second thermocouple 22.

[0047] See also Figure 4 and Figure 9 The controller 23 is equipped with a maintenance system, which includes a control module. The input end of the control module is respectively connected to the monitoring module and the timing module. The input end of the monitoring module is respectively connected to the first thermocouple 4 and the second thermocouple 22. The output end of the control module is respectively connected to the cleaning module, the detection module and the alarm module. The output ends of the cleaning module and the detection module are both connected to the first electric push rod 7, the second electric push rod 16, the third electric push rod, the fourth electric push rod and the drive motor 12. The output end of the alarm module is connected to the indicator light 24 fixedly connected to the controller 23. The alarm module is also connected to the computer in the remote monitoring room.

[0048] Specifically, when the monitoring mechanism is maintained, the thermocouple currently inserted into the discharge pipe of the pump body is cleaned by the cleaning module, and the timing is performed by the timing module, and the cleaning and maintenance are performed within the set maintenance period; in addition, when one of the thermocouples (the first thermocouple 4 or the second thermocouple 22) is cleaned, the first thermocouple 4 and the second thermocouple 22 are simultaneously inserted into the discharge pipe of the pump body by the detection module, and the temperature difference between the two is calculated based on the real-time temperature obtained by the first thermocouple 4 and the second thermocouple 22. When the temperature difference between the two is greater than the set temperature difference threshold, the alarm module lights up the indicator light 24 and transmits the alarm instruction to the computer in the remote monitoring room;

[0049] It should be noted that when the real-time temperature difference between the first thermocouple 4 and the second thermocouple 22 is large after cleaning, it indicates that one of the thermocouples is damaged and needs to be replaced, which promptly reminds the operator to perform on-site maintenance and improve the monitoring quality.

[0050] In view of current actual needs, the protection scope of the above-mentioned implementation mode adopted in this application is not limited to this. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. A marine turbine pump monitoring system, characterized in that: The invention comprises a pump body (1) and a monitoring mechanism installed at a discharge pipe of the pump body, wherein the monitoring mechanism comprises a barrel (2) fixedly connected to the discharge pipe of the pump body, wherein a first thermocouple (4) extending into the discharge pipe of the pump body is provided in the barrel (2); the first thermocouple (4) penetrates a rotating disk (3) rotatably connected to the inner wall of the barrel (2); a passive gear ring (10) is fixedly sleeved on the middle part of the rotating disk (3); the passive gear ring (10) is meshed with a driving gear (11); the driving gear (11) is fixedly connected to the output shaft of a driving motor (12); and the driving motor (12) is fixedly connected to a mounting barrel (13) fixedly connected to the outer wall of the barrel (2); The upper end of the first thermocouple (4) is connected to a first driving mechanism for driving it to rotate up and down, and the first driving mechanism includes a lifting cylinder (5) fixedly connected to the upper end of the first thermocouple (4), the upper end of the lifting cylinder (5) is rotatably connected to a rotating rod (6), the rotating rod (6) is fixedly connected to the movable end of the first electric push rod (7), the fixed end of the first electric push rod (7) is fixedly connected to a mounting plate (20), and the mounting plate (20) is fixedly connected to the rotating plate (3) through a center rod (21); the lifting cylinder (5) is fixedly sleeved with a rolling gear (8), and the rolling gear (8) is engaged with a gear cylinder (9) fixedly connected to the inner wall of the cylinder (2); the lower end of the first thermocouple (4) is rotatably connected to a scraper cylinder (17) rotatably connected to the rotating plate (3), and the scraper cylinder (17) is used to scrape off crude oil sticking to the surface of the first thermocouple (4).

2. A marine turbine pump monitoring system according to claim 1, characterized in that: The rotating disk (3) is provided with a vertical cavity (301) for the first thermocouple (4) to pass through. The upper part of the vertical cavity (301) is fixedly connected with a rubber sealing sleeve (14), and the rubber sealing sleeve (14) is interference-fitted with the first thermocouple (4).

3. A marine turbine pump monitoring system according to claim 2, characterized in that: A horizontal cavity (302) vertically connected to the vertical cavity (301) is provided at the lower portion of the rotating disk (3). A first blocking component is provided in the horizontal cavity (302). The first blocking component includes a plunger (15) slidably connected to the inner wall of the horizontal cavity (302). The plunger (15) is fixedly connected to the movable end of a second electric push rod (16). The fixed end of the second electric push rod (16) is fixedly connected to the inner wall of the horizontal cavity (302).

4. A marine turbine pump monitoring system according to claim 3, characterized in that: The cylinder (2) also includes a second thermocouple (22), the installation structure of the second thermocouple (22) is the same as the installation structure of the first thermocouple (4), the second thermocouple (22) is connected to a second driving mechanism for driving it to rotate up and down, the second driving mechanism includes a third electric push rod, the rotating disk (3) is provided with a second blocking component, and the second blocking component includes a fourth electric push rod; the first electric push rod (7), the second electric push rod (16), the third electric push rod, the fourth electric push rod and the drive motor (12) are all electrically connected to the same controller (23).

5. A marine turbine pump monitoring system according to claim 4, characterized in that: The controller (23) is equipped with a maintenance system, which includes a control module, wherein the input end of the control module is respectively connected to a monitoring module and a timing module, the input end of the monitoring module is respectively connected to a first thermocouple (4) and a second thermocouple (22), the output end of the control module is respectively connected to a cleaning module, a detection module and an alarm module, the output ends of the cleaning module and the detection module are both connected to a first electric push rod (7), a second electric push rod (16), a third electric push rod, a fourth electric push rod and a drive motor (12), the output end of the alarm module is connected to an indicator light (24) fixedly connected to the controller (23), and the alarm module is also connected to a computer in a remote monitoring room.

6. A marine turbine pump monitoring system according to claim 1, characterized in that: The rotating disk (3) is in an I-shaped structure and has an annular cavity in the middle. The passive gear ring (10) is fixed on the inner wall of the annular cavity. The driving gear (11) is arranged in the annular cavity. The rotating disk (3) is located on the upper and lower sides of the annular cavity and is fixedly connected to the raised rings. The inner wall of the cylinder (2) is provided with an annular groove that cooperates with the raised ring.

7. A marine turbine pump monitoring system according to claim 1, characterized in that: The scraper (17) is a truncated cone-shaped structure, with a central hole for the first thermocouple (4) to pass through provided at its center, and a plurality of evenly distributed scraping grooves (1701) connected to the central hole provided on its circumferential side wall, a sliding groove (1702) provided between adjacent scraping grooves (1701) on the inner wall of the central hole, a scraper blade (18) extending into the central hole being slidably connected in the sliding groove (1702), and the scraper blade (18) abutting against a spring sheet (19) fixedly connected to the sliding groove (1702).

8. A marine turbine pump monitoring system according to claim 1, characterized in that: The barrel (2) comprises a fixed barrel (201) fixedly connected to the pump body discharge pipe and a threaded barrel (202) threadedly connected to the fixed barrel (201), and the gear barrel (9) is fixedly connected to the inner wall of the fixed barrel (201).

Images