A ship main engine piston pressure testing system and use method thereof

Abstract

The present invention relates to the field of oil production machine piston detection technology, and in particular to a ship main engine piston pressure test system and a method of using the system, comprising a pressure test water storage tank, a connecting air path arranged on the pressure test water storage tank, a fixing frame and a control terminal arranged at intervals on one side of the pressure test water storage tank, a corridor bridge being arranged on the top of the fixing frame, the control terminal being arranged on the top of the fixing frame, and a pressure control system cooperating with the connecting air path being arranged on the fixing frame. By adopting the above technical scheme, the fixing frame and the pressure test water storage tank cooperate with each other to simultaneously set multiple piston rods on the fixing frame, and by placing the end of the piston rod to be tested in the pressure test water storage tank and then installing a sleeve, the air tightness of the piston rod can be clearly observed through the liquid bubble reaction of the pressure test water storage tank.

Description

Technical Field

[0001] The invention relates to the technical field of oil production machine piston detection, and in particular to a ship main engine piston pressure testing system and a use method thereof. Background Art

[0002] The diesel engine piston is composed of a top, a head and a skirt. 1. The shape of the piston top is related to the type of combustion chamber selected. The diesel engine uses a round combustion chamber with a concave top. There is a triangular arrow mark on the top of the piston. After installation, the arrow should point to the front end of the engine body. 2. The piston head refers to the part above the piston ring groove. Its main function is to withstand gas pressure and transmit it to the connecting rod; together with the piston ring, it realizes the sealing of the cylinder; and conducts the heat absorbed by the piston top to the cylinder wall through the piston ring. 3. The piston skirt refers to the part from the lower end of the oil ring to the bottom of the piston. Its function is to guide the reciprocating motion of the piston in and out of the cylinder and to withstand side pressure. The gap between the piston skirt and the cylinder liner is called the cylinder gap.

[0003] In the existing technology, diesel engine pistons used in large ships need to be tested for air tightness before they can be installed and used. The current technical testing is either slow for a single test or inconvenient for observation. Therefore, there is an urgent need for a device that can quickly test the air tightness of multiple pistons to improve the inspection and maintenance speed of the pistons. Summary of the invention

[0004] The purpose of the present invention is to provide a ship main engine piston pressure testing system and a use method thereof to solve the problems existing in the above-mentioned prior art.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] A ship main engine piston pressure test system comprises a pressure test water storage tank, a connecting air path arranged on the pressure test water storage tank, a fixing frame and a control terminal arranged at intervals on one side of the pressure test water storage tank, a walking corridor bridge is arranged on the top of the fixing frame, the control terminal is arranged on the top of the fixing frame, and an air pressure control system cooperating with the connecting air path is arranged on the fixing frame.

[0007] By adopting the above technical scheme, the cooperation between the fixing frame and the pressure test water storage tank can simultaneously set multiple piston rods on the fixing frame, and by placing the end of the piston rod to be tested in the pressure test water storage tank and then installing the sleeve, the air tightness of the piston rod can be clearly observed through the liquid bubble reaction of the pressure test water storage tank.

[0008] In a further embodiment, the fixing frame includes a fixing plate, a plurality of supporting columns arranged at the bottom end of the fixing plate, a safety guardrail arranged at the top end of the fixing plate, and a plurality of limiting mechanisms arranged at a side of the fixing plate close to the pressure test water storage tank. A stabilizing plate is arranged at the bottom of the supporting column, and the stabilizing plate is used to increase the contact area between the supporting column and the ground. A plurality of triangular plates are arranged at the top end of the supporting column, one side of the triangular plate is welded and fixed to the bottom end of the fixing plate, and one side of the triangular plate is welded and fixed to the supporting column. The plurality of triangular plates are axially evenly arranged at the top end of the supporting column, a groove is arranged on one side of the fixing plate, an inclined plate is obliquely arranged in the groove, and the end of the inclined plate that is not connected to the fixing plate The cam is flush with the bottom end surface of the support column, a step ladder is arranged on the inclined plate, a handrail is arranged on the periphery of the inclined plate, a semicircular groove corresponding to the limiting mechanism is arranged on the side of the fixed plate close to the pressure test water storage tank, the semicircular groove is used to accommodate the piston rod, and the limiting mechanism is arranged in the semicircular groove in a one-to-one manner, the limiting mechanism includes a clamping ring and a pressure alarm arranged on the clamping ring, the clamping ring is used to cooperate with the semicircular groove to limit the piston rod in the semicircular groove, the pressure alarm is used to sound an alarm when the surface contact pressure between the semicircular groove and the piston rod exceeds a set value, the bottom of the pressure test water storage tank is fixed to the ground by anchor rods, and the fixing frame is fixed to the ground by bolting bolts.

[0009] By adopting the above technical solution, the limiting mechanism can prevent the piston rod from tilting and overturning, thereby increasing the safety of the equipment.

[0010] In a further embodiment, a water injection pipeline is provided on the pressure test water storage tank, and the water injection pipeline includes a water inlet nozzle, a drainage nozzle, a filter device, a water pump and a water reservoir connected to the interior of the pressure test water storage tank. The water pump is installed on one side of the water reservoir, and the water reservoir is connected to the water inlet end of the water pump through a first pipeline, and the water outlet end of the water pump is connected to the water inlet nozzle of the pressure test water storage tank through a second pipeline, and the drainage nozzle is connected to the interior of the filter device through a third pipeline, and the interior of the filter device is provided with a water surface oil film scraping device and filter cotton.

[0011] In a further embodiment, the connecting gas circuit includes a main pipeline and a plurality of branch pipelines arranged at intervals on the main pipeline, each branch pipeline is provided with a valve at one end away from the main pipeline, the valve is provided with a quick-connect nozzle, the branch pipelines are evenly connected to the main pipeline, a pressure detection device is provided on the main pipeline, the main pipeline is connected to the air pressure control system, the air pressure control system includes an air storage tank, an air compressor, a control cabinet and a mobile control terminal, the air inlet of the air storage tank is connected to the air outlet of the air compressor, the air compressor The air outlet is connected to the main pipeline through a three-way valve, and the air outlet of the gas tank is connected to the main pipeline through a solenoid valve. A one-way valve is provided at the connection between the air outlet of the gas tank and the main pipeline. The one-way valve is used to allow the gas in the gas tank to flow into the main pipeline. The control cabinet is used to control the opening and closing of the solenoid valve, the start and stop of the air compressor, detect the data of the force sensor and send and receive control instructions. A wireless signal transceiver unit is provided inside the control cabinet, and the wireless signal transceiver unit is connected to the mobile control terminal electrical signal through radio signals.

[0012] In a further embodiment, each of the branch pipes is provided with a one-way check valve.

[0013] In a further embodiment, the inner wall of the pressure test water storage tank is provided with a hydrophobic coating.

[0014] The present invention also discloses a method for using a ship main engine piston pressure testing system, comprising the following steps:

[0015] S1, detection control cabinet and mobile control terminal, valve, solenoid valve, signal connection line connecting gas circuit;

[0016] S2, placing the piston rod and connecting the piston rod to the gas circuit;

[0017] S3, test the water storage tank to store water and control the gas line pressure;

[0018] S4. Check air tightness.

[0019] In summary, the present invention has the following beneficial effects:

[0020] 1. Through the cooperation between the fixing frame and the pressure test water storage tank, multiple piston rods can be set on the fixing frame at the same time, and by placing the end of the piston rod to be tested in the pressure test water storage tank and then installing the sleeve, the air tightness of the piston rod can be clearly observed through the liquid bubble reaction of the pressure test water storage tank;

[0021] 2. The limit mechanism can prevent the piston rod from tilting and tipping over, thus increasing the safety of the equipment;

[0022] 3. By connecting the wireless signal transceiver unit with the mobile control terminal electrical signal through radio signals, it can achieve the effect of remote control to realize unmanned operation and save manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of a ship main engine piston pressure testing system of the present invention;

[0024] Figure 2 It is a structural schematic diagram of a fixing frame of a ship main engine piston pressure testing system of the present invention;

[0025] In the figure, 1. test pressure water storage tank; 11. water filling pipeline; 12. water inlet nozzle; 13. drainage nozzle; 14. filtering device; 15. water pump; 16. water reservoir; 2. connecting air line; 3. fixing frame; 31. fixing plate; 32. supporting column; 33. safety guardrail; 34. limiting mechanism; 35. stabilizing plate; 4. control terminal; 5. air pressure control system. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0027] The same parts are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the attached Figure 1 In the description of this specification, the words "bottom" and "top", "inside" and "outside" refer to directions toward or away from a particular component geometry, respectively. In addition, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this specification, "plurality" means two or more, unless the direction of the center is otherwise clearly and specifically defined.

[0028] Embodiment 1:

[0029] like Figure 1-Figure 2As shown, a ship main engine piston pressure test system includes a pressure test water storage tank 1, a connecting air path 2 arranged on the pressure test water storage tank 1, a fixing frame 3 and a control terminal 4 arranged at intervals on one side of the pressure test water storage tank 1, a corridor bridge is arranged on the top of the fixing frame 3, the control terminal 4 is arranged on the top of the fixing frame 3, and an air pressure control system 5 cooperating with the connecting air path 2 is arranged on the fixing frame 3. The fixing frame 3 includes a fixing plate 31, a plurality of support columns 32 arranged at the bottom end of the fixing plate 31, a safety guardrail 33 arranged at the top end of the fixing plate 31, and a control terminal 4 arranged on the fixing plate 31 is close to a plurality of limiting mechanisms 34 on one side of the pressure test water storage tank 1, a stabilizing plate 35 is provided at the bottom of the support column 32, and the stabilizing plate 35 is used to increase the contact area between the support column 32 and the ground, and a plurality of triangular plates are provided at the top of the support column 32, one side of the triangular plate is welded and fixed to the bottom of the fixing plate 31, and one side of the triangular plate is welded and fixed to the support column 32, and the plurality of triangular plates are axially uniformly arranged at the top of the support column 32, and a groove is provided on one side of the fixing plate 31, and an inclined plate is obliquely arranged in the groove, and the inclined plate does not contact the fixing plate One end of the plate 31 connected is flush with the bottom end surface of the support column 32, the inclined plate is provided with a step ladder, the periphery of the inclined plate is provided with a handrail, and the fixed plate 31 is provided with a semicircular groove corresponding to the limiting mechanism 34 on one side close to the pressure test water storage tank 1, the semicircular groove is used to accommodate the piston rod, and the limiting mechanism 34 is arranged in the semicircular groove in a one-to-one correspondence. The limiting mechanism 34 includes a clamping ring and a pressure alarm arranged on the clamping ring, the clamping ring is used to cooperate with the semicircular groove to limit the piston rod in the semicircular groove, and the pressure alarm is used to When the surface contact pressure exceeds the set value, an alarm is sounded. The bottom of the test pressure water storage tank 1 is fixed to the ground by anchor rods, and the fixing frame 3 is bolted to the ground by fastening bolts. The above technical solution can make the fixing frame 3 convenient for people to get on and off, and by installing a visual recognition device on the fixing frame, the whole working process on the mounting frame 3 can be monitored, so that the purpose of leaving the construction site can be truly achieved. Because the piston rods to be tested are used on large ships, the corresponding piston rods themselves are also very large, so the departure of personnel can better protect the personal safety of personnel.

[0030] like Figure 1-Figure 2As shown, the pressure test water storage tank 1 is provided with a water injection pipeline 11, and the water injection pipeline 11 includes a water inlet nozzle 12, a drainage nozzle 13, a filter device 14, a water pump 15 and a water reservoir 16 which are connected to the interior of the pressure test water storage tank 1. The water pump 15 is installed on one side of the water reservoir 16, and the water reservoir 16 is connected with the water inlet end of the water pump 15 through a first pipeline, and the water outlet end of the water pump 15 is connected with the water inlet nozzle 12 of the pressure test water storage tank 1 through a second pipeline, and the drainage nozzle 13 is connected with the interior of the filter device 14 through a third pipeline, and the interior of the filter device 14 is provided with a water surface oil film scraping device and filter cotton, and the connecting gas circuit 2 includes a main pipeline and a plurality of branch pipelines arranged at intervals on the main pipeline, and each branch pipeline is provided with a valve at one end away from the main pipeline, and a quick-connect nozzle is provided on the valve, and the branch pipeline is evenly connected to the main pipeline, and a main pipeline is provided There is a pressure detection device, the main pipeline is connected to the air pressure control system 5, the air pressure control system 5 includes an air tank, an air compressor, a control cabinet and a mobile control terminal 4, the air inlet of the air tank is connected to the air outlet of the air compressor, the air outlet of the air compressor is connected to the main pipeline through a three-way valve, the air outlet of the air tank is connected to the main pipeline through a solenoid valve, a one-way valve is provided at the connection between the air outlet of the air tank and the main pipeline, the one-way valve is used to allow the gas in the air tank to flow into the main pipeline, the control cabinet is used to control the opening and closing of the solenoid valve, the start and stop of the air compressor, detect the data of the force sensor and for sending and receiving control instructions, a wireless signal transceiver unit is provided inside the control cabinet, the wireless signal transceiver unit is connected to the mobile control terminal 4 electrical signal through a radio signal, a one-way check valve is provided on the branch pipeline, and the inner wall of the test pressure water storage tank 1 is provided with a hydrophobic coating.

[0031] Specific implementation process: when in use, the piston needs to be lifted into the pressure test water storage tank 1 by a crane, and a sleeve matching the piston rod needs to be placed in the pressure test water storage tank 1, and then the pipeline is connected for pressure test, and water is stored in the pressure test water storage tank 1. Through this method, the first is to make the pressure observable on the ground, and a corresponding pressure gauge is provided on the pressure test water storage tank 1. The second is that the device can detect a whole set of piston rods at one time, avoiding the waste of driving resources for a single detection. When all the piston rods are erected in the pressure test water storage tank 1, the clamping device locks the piston rod to avoid the side tilt of the piston rod.

[0032] The present invention also discloses a method for using a ship main engine piston pressure testing system, comprising the following steps:

[0033] S1, detection control cabinet and mobile control terminal 4, valve, solenoid valve, signal connection line connecting gas circuit 2;

[0034] S2, placing the piston rod and connecting the piston rod to the gas path of the connecting gas path 2;

[0035] S3, test the water storage tank 1 to store water and control the air circuit pressure;

[0036] S4. Check air tightness.

[0037] Embodiment 2:

[0038] like Figure 1-2 As shown, because the present solution requires fixing the piston rod, the fixing frame needs to have certain stability and rollover resistance, and the structural strength should be high, otherwise the piston rod will be easily tilted.

[0039] Embodiment 3:

[0040] The fixing frame 3 includes a fixing plate 31, a plurality of supporting columns 32 arranged at the bottom end of the fixing plate 31, a safety guardrail 33 arranged at the top end of the fixing plate 31, and a plurality of limiting mechanisms 34 arranged at the side of the fixing plate 31 close to the pressure test water storage tank 1. A stabilizing plate 35 is arranged at the bottom of the supporting column 32, and the stabilizing plate 35 is used to increase the contact area between the supporting column 32 and the ground. A plurality of triangular plates are arranged at the top end of the supporting column 32, one side of the triangular plate is welded and fixed to the bottom end of the fixing plate 31, and one side of the triangular plate is welded and fixed to the supporting column 32. The plurality of triangular plates are evenly arranged axially at the top end of the supporting column 32. The fixing plate 3 A groove is provided on one side of 1, and an inclined plate is obliquely provided in the groove, and the end of the inclined plate not connected to the fixed plate 31 is flush with the bottom end surface of the support column 32, and a step ladder is provided on the inclined plate, and a handrail is provided on the periphery of the inclined plate. A semicircular groove corresponding to the limiting mechanism 34 is provided on the side of the fixed plate 31 close to the pressure test water storage tank 1, and the semicircular groove is used to accommodate the piston rod, and the limiting mechanism 34 is arranged in the semicircular groove in a one-to-one correspondence. The limiting mechanism 34 includes a clamping ring and a pressure alarm arranged on the clamping ring, and the clamping ring is used to cooperate with the semicircular groove to limit the piston rod in the semicircular groove, and the pressure alarm is used to When the surface contact pressure between the semicircular groove and the piston rod exceeds the set value, an alarm is sounded. The bottom of the test pressure water storage tank 1 is fixed to the ground by anchor rods, and the fixing frame 3 is bolted to the ground by fastening bolts. In this device, one end of the clamping ring is hinged and fixed to the fixing frame, and then a hinge point is set in the middle position of the clamping ring. The clamping ring is pushed to punch and close by the cylinder, and the other end of the clamping ring is locked and fixed to the fixing frame by bolts. After the bolts are locked, the end of the clamping ring hinged to the fixing frame needs to be fixed for the second time by a hook to avoid the failure of the hinged device due to wear and cracks during long-term use, and the hook needs to be replaced regularly. At one end, automatic locking is achieved by arranging a motor on a fixed frame. The specific structure is: a motor is arranged on the fixed frame, the motor is arranged vertically, and the rotating shaft of the motor is located on the upper side, a vertical plate is arranged on one side of the motor body, an extension plate is arranged on the top of the vertical plate, a threaded hole is arranged in the middle position of the extension plate, a bolt is screwed in the threaded hole, the head of the bolt is round, and anti-slip grooves are arranged on it, a roller is sleeved on the rotating shaft of the motor, the surface of the roller is arranged with anti-slip grooves, the surface of the roller is in contact with the surface of the head of the bolt, and a touch switch is arranged on the extension plate. Only when the touch switch detects the bolt head, the detection system of the entire device is allowed to be powered on.

[0041] In the embodiments disclosed in the present invention, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments disclosed in the present invention can be understood according to specific circumstances.

[0042] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A ship main engine piston pressure test system, characterized in that: It comprises a pressure test water storage tank (1), a connecting air path (2) arranged on the pressure test water storage tank (1), a fixing frame (3) and a control terminal (4) arranged at intervals on one side of the pressure test water storage tank (1), a corridor bridge is arranged on the top of the fixing frame (3), the control terminal (4) is arranged on the top of the fixing frame (3), and a pressure control system (5) cooperating with the connecting air path (2) is arranged on the fixing frame (3); The fixing frame (3) comprises a fixing plate (31), a plurality of supporting columns (32) arranged at the bottom end of the fixing plate (31), a safety guardrail (33) arranged at the top end of the fixing plate (31), and a plurality of limiting mechanisms (34) arranged at a side of the fixing plate (31) close to the pressure test water storage tank (1); a stabilizing plate (35) is arranged at the bottom of the supporting column (32); the stabilizing plate (35) is used to increase the contact area between the supporting column (32) and the ground; a plurality of triangular plates are arranged at the top end of the supporting column (32); one side of the triangular plates is welded and fixed to the bottom end of the fixing plate (31); one side of the triangular plates is welded and fixed to the supporting column (32); the plurality of triangular plates are axially and evenly arranged at the top end of the supporting column (32); a groove is arranged on one side of the fixing plate (31); an inclined plate is obliquely arranged in the groove; The end of the inclined plate not connected to the fixed plate (31) is flush with the bottom end surface of the support column (32), the inclined plate is provided with a step ladder, the periphery of the inclined plate is provided with a handrail, the fixed plate (31) is provided with a semicircular groove corresponding to the limiting mechanism (34) on one side close to the pressure test water storage tank (1), the semicircular groove is used to accommodate the piston rod, the limiting mechanism (34) is arranged in the semicircular groove in a one-to-one correspondence, the limiting mechanism (34) comprises a clamping ring and a pressure alarm arranged on the clamping ring, the clamping ring is used to cooperate with the semicircular groove to limit the piston rod in the semicircular groove, the pressure alarm is used to sound an alarm when the surface contact pressure between the semicircular groove and the piston rod exceeds a set value, the bottom of the pressure test water storage tank (1) is fixed to the ground by anchor rods, and the fixing frame (3) is fixed to the ground by bolting bolts; The pressure test water storage tank (1) is provided with a water injection pipeline (11), the water injection pipeline (11) comprises a water inlet nozzle (12) connected to the interior of the pressure test water storage tank (1), a water discharge nozzle (13), a filter device (14), a water pump (15) and a water reservoir (16), the water pump (15) is installed on one side of the water reservoir (16), the water reservoir (16) is connected to the water inlet end of the water pump (15) through a first pipeline, the water outlet end of the water pump (15) is connected to the water inlet nozzle (12) of the pressure test water storage tank (1) through a second pipeline, the water discharge nozzle (13) is connected to the interior of the filter device (14) through a third pipeline, and a water surface oil film scraping device and filter cotton are provided inside the filter device (14).

2. A ship main engine piston pressure test system according to claim 1, characterized in that: The connecting gas circuit (2) comprises a main pipeline and a plurality of branch pipelines arranged at intervals on the main pipeline, each branch pipeline is provided with a valve at one end away from the main pipeline, the valve is provided with a quick-connect nozzle, the branch pipelines are evenly connected to the main pipeline, the main pipeline is provided with a pressure detection device, the main pipeline is connected to the air pressure control system (5), the air pressure control system (5) comprises an air storage tank, an air compressor, a control cabinet and a mobile control terminal (4), the air inlet of the air storage tank is connected to the air outlet of the air compressor, the air outlet of the air compressor is connected to the air inlet of the air storage tank, and the air outlet of the air compressor is connected to the air outlet of the air compressor. The gas port is connected to the main pipeline through a three-way valve, and the gas outlet of the gas storage tank is connected to the main pipeline through an electromagnetic valve. A one-way valve is provided at the connection point between the gas outlet of the gas storage tank and the main pipeline, and the one-way valve is used to allow the gas in the gas storage tank to flow into the main pipeline. The control cabinet is used to control the opening and closing of the electromagnetic valve, the start and stop of the air compressor, the detection and collection of sensor data, and the sending and receiving of control instructions. A wireless signal transceiver unit is provided inside the control cabinet, and the wireless signal transceiver unit is electrically connected to the mobile control terminal (4) through radio signals.

3. A ship main engine piston pressure test system according to claim 2, characterized in that: The branch pipes are all provided with one-way check valves.

4. A ship main engine piston pressure test system according to claim 1, characterized in that: The inner wall of the pressure test water storage tank (1) is provided with a hydrophobic coating.

5. The method for using the ship main engine piston pressure test system according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1, a signal connection line between the detection control cabinet and the mobile control terminal (4), valves, solenoid valves, and connecting gas circuits (2); S2, placing the piston rod and connecting the piston rod to the gas path (2); S3, the test pressure water storage tank (1) stores water and controls the gas circuit pressure; S4. Check air tightness.

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