JPH0127257B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a test device for testing three types of fuel valves, which are injection valves, safety valves with cylinder lids, and safety valves for fuel pumps, which are installed in large diesel engines mounted on ships. .

B. Prior Art Ships equipped with Sulzer type large diesel engines are equipped with a fuel injection test device for testing and adjusting the operating status of spare injection valves, safety valves with cylinder lids, and safety valves for fuel pumps that are normally installed on diesel engines. is installed. During the voyage, maintenance and inspections are carried out using a fuel valve injection testing device to ensure that the spare injection valves, cylinder lid safety valves, and fuel pump safety valves are always in the best condition. Note that the fuel valve injection test device is used not only during navigation but also on land.

FIG. 1 is a drawing showing an example of an injection valve 1 whose operating state is tested by the fuel valve injection test device. In the figure, 2 is a valve body, 3 is a nozzle fixed to the tip of the valve body 2 via a cap nut 4, and 5 is a needle slidably housed in holes 2a and 3a provided in the valve body 2 and nozzle 3. be. The tip of the needle 5 is in contact with a conical valve seat 3b provided in the nozzle 3, and the rear end is in pressure contact with a spring 6 housed in the valve body 2.
As a result, the tip of the needle 5 is in pressure contact with the valve seat 3b. The pressing force of the spring 6 can be adjusted using a bolt 7 screwed into the valve body 2. 8 is an oil supply hole for supplying fuel into the pressure reservoir 3c provided in the nozzle 3; 9 is a circulation valve communicating with the oil supply hole 8;
The circulation valve 9 is designed to open with a weak pressure of about 30 kg/cm ² .

In the above configuration, in order to inject fuel from the tip of the nozzle 3 of the injection valve 1, the fuel is force-fed from the fuel pump (not shown) to the circulation valve 9, and pressure is applied to the circulation valve 9. By adding the fuel, the circulation valve 9 is opened, and fuel is pumped into the pressure reservoir 3c through the oil supply hole 8 communicating with the circulation valve 9. At this time, the air in the oil supply hole 8 and the pressure reservoir 3c flows through the nozzle 3 and the holes 3a and 2a provided in the valve body 2.
and the needle 5 inserted into the holes 3a, 2a, and is discharged to the outside through the drain discharge hole 10 provided in the valve body 2. When the pressure of the fuel accumulated in the pressure reservoir 3c reaches a predetermined value, the needle 5 is pushed up against the elastic force of the spring 6, and fuel is injected from the small hole 3d provided at the tip of the nozzle 3.

FIG. 2 is a diagram showing an example of the safety valve 15 with a cylinder lid. The safety valve 15 shown in this figure includes a cylindrical valve body 16, a fuel inlet hole 17a screwed to the tip of the valve body 16, and a fuel discharge hole 17a screwed onto the tip of the valve body 16. A nozzle 17 having a hole 17b and a needle 1 inserted into the nozzle 17
8, a spring 19 for pressing the needle 18 with a predetermined pressure, and a spring 19 connected to the valve body 1.
6 and a bolt 20 for storage therein. When the pressure of the fuel flowing into the inflow hole 17a reaches a predetermined value (approximately 200 kg/cm ² ) or more, the needle 1 resists the elastic force of the spring 19.
8 is pushed up, the valve opens and the fuel escapes to the outside from the discharge hole 17b.

FIG. 3 is a drawing showing an example of a fuel pump safety valve 25, and the safety valve 25 shown in this drawing has a valve main body 2 having a fuel inflow hole 26a and a fuel discharge hole 26b.
6, a needle 27 inserted into the valve body 26 to close the inflow hole 26a provided in the valve body 26,
A spring 30 for pressing the needle 27 into the inflow hole 26a via a supporter 29 having a steel ball 28, and a spring retainer 31 screwed onto the upper part of the valve body 26 in order to store the spring 30 in the upper part of the valve body 26. It is composed of: When the pressure of the fuel flowing into the inflow hole 26a reaches a predetermined value (approximately 1200 kg/cm ² ) or more, the spring 3
The needle 27 is pushed up against the elastic force of 0, and the slit 27a provided on the outer periphery of the needle 27
The fuel is discharged to the outside through a discharge hole 26b provided in the valve body 26.

By the way, the Sulzer type diesel engine equipped with the above-mentioned injection valve 1, cylinder lid safety valve 15, and fuel pump safety valve 25 has recently been implemented with energy saving measures, and accordingly, the injection valve 1 The fuel injected from the engine is also being injected at high pressure and high speed.

Therefore, the pressure applied to the needle 5 by the spring 6 of the injection valve 1 has been increased from about 250 Kg/cm ² to about 350 Kg/cm ² .

However, as the pressure and speed of the injector 1 increases, a problem arises in that conventional fuel injection test equipment is unable to apply sufficient pressure to the injector 1 during testing, making it impossible to perform accurate tests. ing.

The above fuel valve injection test device is also equipped with a mechanism that supplies fuel at a high pressure of 1200 kg/cm ² to the fuel pump safety valve 25, but since this mechanism can normally only supply a small amount of fuel, It is not possible to perform an injection test on the injection valve 1 using this mechanism.

(b) Purpose of the invention To provide a fuel valve injection test device that is fully compatible with high-pressure, high-speed injection valves as an energy-saving measure, and is also capable of accurately testing the operation of a safety valve with a cylinder lid and a safety valve for a fuel pump. It is something.

C. Structure of the Invention A fuel valve injection test device includes an air booster consisting of a plunger pump that supplies fuel at a predetermined pressure to a fuel valve, an air cylinder for driving the plunger pump, and an air booster that supplies air to the air cylinder. An injection switching valve for switching the supply direction, an air source for supplying air to the air cylinder via the injection switching valve, and a fuel tank for storing the fuel supplied to the fuel valve by the plunger pump. , a switching valve for switching the supply direction of fuel discharged from the discharge hole of the plunger pump, and a high-pressure hand pump that further pressurizes the fuel discharged from the plunger pump to a predetermined pressure.

D. Embodiment FIG. 4 is a system diagram showing a circuit configuration of a fuel valve injection test device according to the present invention. In the figure, 40 is a plunger pump 41 and a plunger 42 of the plunger pump 41 for pressure-feeding fuel to the injection valve 1, the cylinder lid safety valve 15, and the fuel pump safety valve 25.
This is an air booster consisting of an air cylinder 43 for reciprocating. A suction hole 44 provided in the plunger pump 41 of the air booster 40
is connected via an oil filter 46 to a fuel tank 45 that stores fuel to be pumped to the injection valve 1, cylinder lid safety valve 15, and fuel pump safety valve 25, and the discharge hole 47 is connected to the plunger pump 41.
It is connected to a switching valve 48 for switching the supply direction of fuel discharged from the fuel tank. Also air booster 4
The first intake/exhaust hole 49 provided in the air cylinder 43 of No. air source 5
It is designed to be connected to the first or second muffler 54. When the injection switching valve 50 is in the illustrated state, the first intake/exhaust hole 49 is connected to the first muffler 52 and the second intake/exhaust hole 53 is connected to the air source 51, so that the air cylinder 43 is The cylinder 55 slides to the right in the figure, causing the plunger 42 of the plunger pump 41 connected to the piston rod 56 of the air cylinder 43 to slide in the suction direction (to the right in the figure). Furthermore, when the injection switching valve 50 is located in the opposite direction to the figure, the first intake/exhaust hole 49 is connected to the air source 51, and the second intake/exhaust hole 53 is connected to the second muffler 54, so that the air cylinder 43 The plunger pump 41 slides to the left in the figure and is connected to the piston rod 56 of the air cylinder 43.
slide the plunger 42 in the discharge direction (to the left in the figure). Note that the first muffler 52 is
The muffler 54 is smaller in size than the second muffler 54, and has greater exhaust resistance than the second muffler 54.
A diaphragm slit 57 is interposed between the two.
Therefore, when the injection switching valve 50 is switched to cause the piston 55 of the air cylinder 43 to reciprocate, the piston 55 is connected to the plunger 42 of the plunger pump 41.
When sliding in the discharge direction, plunger 4
2 moves at high speed, and the piston 55 is connected to the plunger 4.
2 in the suction direction, it moves at a low speed due to the exhaust resistance of the first muffler 52 and the throttle slit 57, ensuring that the plunger pump 41 sucks the fuel, and at the same time, the sucked fuel It is designed to discharge at high speed. Also, the air booster 40 has a maximum of 700 kg/ ^cm2 when the air pressure from the air source 51 is 7 kg/cm2.
The dimensions of each member are determined in advance so as to generate a pressure of Kg/cm ² . 58, 59, 60, and 61 are air filters, air regulators, safety valves, and oilers that are interposed between the air source 51 and the injection switching valve 50, and the oiler 61 operates as an air booster using an air circuit. It supplies lubricating oil to 40. 62 is a high pressure hose connected to one outflow hole of the switching valve 48;
Connect the tip of the injection valve 1 or the safety valve 15 with a cylinder lid.
The discharge hole 47 of the plunger pump 41 and the injection valve 1 or the safety valve with cylinder lid 15 are connected by connecting to the cylinder lid. 63 is a high pressure hand pump connected to the other outflow hole of the switching valve 48 via the check valve 64, and the high pressure hand pump 63 is connected to the high pressure cylinder 65 and the high pressure cylinder 6.
Plunger 66 housed in 5 and plunger 6
6 and an operating lever 67 for manually reciprocating the lever 6. Then, the fuel pumped from the plunger pump 41 through the switching valve 48 into the high-pressure cylinder 65 of the high-pressure hand pump 63 is further pressurized by manually sliding the plunger 66, and then is discharged from the discharge hole. There is. Note that the discharge pressure from the high-pressure hand pump 63 can be set to, for example, 1200 kg/cm ² regardless of the pressure of the fuel sent from the plunger pump 41 to the high-pressure hand pump 63. 6
Reference numeral 8 denotes a safety valve set base connected to the high pressure hand pump 63 via a pressure regulating valve 69. By setting the fuel pump safety valve 25 to the safety valve set base 68, the high pressure hand pump 63 and the fuel pump safety valve 25 can be connected. It is set to connect. 70
An air pressure gauge 71 measures the pressure of the air supplied from the air source 51, and a first air pressure gauge 71 measures the discharge pressure of the fuel discharged from the plunger pump 41.
A high-pressure pressure gauge 72 is a second high-pressure pressure gauge that measures the discharge pressure of fuel discharged from the high-pressure hand pump 63, and the second high-pressure pressure gauge 72 is attached to the upper part of the safety valve set base 68. Further, numeral 73 in the figure is a check valve interposed between the plunger pump 41 and the switching valve 48.

FIGS. 5 to 7 are drawings showing the external shape of a fuel valve injection test device that accommodates various parts shown in the system diagram of FIG. 4. In the figure, 80 is the main body of the fuel valve injection test device, and inside the main body 80, there are
Air booster 40, injection switching valve 50, air filter 58, air regulator 59, pressure regulating valve 6
0, a high-pressure hand pump 81 with a switching valve is equipped with an oiler 61 and is integrated with a switching valve 48, a high-pressure hand pump 63, a pressure regulating valve 69, and two check valves 64 and 73 shown in FIG. It's inside. Further, an air pressure gauge 70 and a first high pressure pressure gauge 71 are attached to the front panel 80a, as well as a switching valve 48, an injection switching valve 50, and a high pressure hand pump 6.
Operating levers 48a, 50a, 67 and an operating handle 59a for operating the air regulator 3 and air regulator 59 protrude. Furthermore, a safety valve set stand 68 for supporting the fuel pump safety valve 25 is attached to the upper surface of the gantry main body 80. Reference numeral 82 denotes an injection box having a glass window 83 for visually confirming the injection state of fuel injected from the injection valve 1 and the safety valve with cylinder lid 15 formed in the mount body 80, and which is tested by a fuel valve injection test device. The injection valve 1 to be tested is disassembled by an inversion disassembly table 88, which will be described later.
The nozzle 3 located at the tip is supported in an upright state above the injection box 82 so as to protrude into the injection box 82. Further, the safety valve with cylinder lid 15 is tested while being inserted into the safety valve test tube 84 inserted into the injection box 82. The safety valve testing cylinder 84 has a bottomed cylindrical shape as shown in FIG. A through hole 85 that communicates with the nozzle 17 and an opening 86 that coincides with the discharge hole 17b of the nozzle 17 are provided. A high-pressure pipe connection part 87 that communicates with the through hole 85 is provided at the lower side of the safety valve test cylinder 84, and a high-pressure hose that communicates with the plunger pump 41 via the switching valve 48 is provided in the high-pressure pipe connection part 87. By connecting one end of the cylinder cover 62, fuel is supplied to the inflow hole 17a of the safety valve 15 with a cylinder lid. 88 supports the injection valve 1 in an upright state above the injection box 82, and when the injection valve 1 requires adjustment, supports the injection valve 1 in a horizontal state on the gantry main body 80. This is an inverted disassembly stand attached to the top. The inversion disassembly table 8
8 includes a base 91 consisting of a disk-shaped support plate 89 and a bracket 90 for vertically fixing the support plate 89 on the gantry main body 80; A rotary plate 92 that is pivotally mounted, and a first
to a rotary table 97 consisting of fourth support plates 93, 94, 95, and 96. Then, by rotating the rotary table 97 by 90 degrees with the injection valve 1 placed on the rotary table 97, the injection valve 1 can be held in two positions, a vertical position and a horizontal position, on the pedestal main body 80. be. 45 is a fuel tank arranged at the lower part of the injection box 82, and the fuel tank 45 is the injection valve 1 or the safety valve 1 with a cylinder lid.
At the same time, the fuel to be supplied to the injection valve 1 is stored.
Alternatively, the fuel injected from the safety valve 15 with a cylinder lid is collected. 98 is the mount body 8
An air source connection port 99 is provided at the bottom of the frame body 80 for connecting the air booster 40 and an air source 51 such as an air compressor, and an air source connection port 99 communicates with the outflow hole of the switching valve 48 provided at the top of the gantry body 80. This is a high-pressure pipe connection part 99, and the high-pressure hose 6
2 and the other end to the high pressure pipe connection part 87 of the safety valve test cylinder 84 that houses the injection valve 1 or the safety valve with cylinder lid 15 set in the injection box 82. The fuel discharged from the air booster 40 is supplied to the safety valve 15 with a cylinder lid housed in the safety valve test cylinder 84. 100 is an extension lever of the high-pressure hand pump operating lever 67. When operating the high-pressure hand pump 63, this extension lever 100 is fitted into the operating lever 67 of the high-pressure hand pump 63 as shown in FIG. This facilitates the operation of the lever 67, and when not in use, it is held on the side of the gantry main body 80 as shown in FIG. 5 to prevent the long lever from protruding from the front surface of the gantry main body.

FIG. 9 is a drawing showing details of the air booster 40 consisting of the air cylinder 43 and plunger pump 41 described above. In the figure, 101 is a cylinder of the air cylinder 43 that houses a piston 55 and a piston rod 56, and 102 and 103 are cylinder heads that are attached to openings at both ends of the cylinder 101.
The first intake/exhaust hole 49 and the second intake/exhaust hole 53 described above are provided. 104 is a guide tube whose one end is fitted into the cylinder head 102; 105 is a base block which is fitted with the other end of the guide tube 104; It is fixed by matching stud bolts 106. 107 is base block 10
5, and within the high pressure cylinder 107 is a plunger 42 connected to the piston rod 56 via a coupling 108.
is inserted. 109 is a high pressure cylinder 107
The head block 109 is fitted with a fuel suction hole 44.
and a discharge hole 47 are provided, and check valves 110 and 111 are housed therein to prevent backflow of fuel. 112 is a locking plate onto which the head bolt 113 is screwed; 114 is a lock nut for fixing the head bolt 113; 115
is a connecting bolt that passes through the locking plate 112, and the locking plate 1
12, head bolt 113, lock nut 114
The high pressure cylinder 107 and head block 109 are fixed by connecting bolts 115. By reciprocating the piston 55 of the air cylinder 43 and reciprocating the plunger 42 within the high-pressure cylinder 107, fuel is sucked and discharged.

10 and 11 show the switching valve 48, high pressure hand pump 63, pressure regulating valves 69 and 2 shown in FIG. 4.
It is a drawing showing a high-pressure hand pump 81 with a switching valve that integrates check valves 64 and 73. Drawing 116
is a small body for configuring the switching valve 48,
A pump body 117 constitutes the high-pressure hand pump 63, and the pump body 116 and the pump body 117 are integrally connected with bolts. 118 is a kettle rotatably inserted into the kettle body 116, and 119 is a kettle 11.
120 is a shaft integrally formed with the shaft 118, and 48a is an operating lever fixed to the tip of the shaft 120 for rotating the shaft 118. 121 is an inflow hole bored in the body 116, 122 is an outflow hole, 123 is a communication hole, and the inflow hole 121,
The outflow hole 122 and the communication hole 123 are arranged at right angles to each other. Then, by rotating the pot 118 by 90 degrees and connecting one open end of the L-shaped hole 119 provided in the pot 118 to the inflow hole 121 and the other open end to the outflow hole 122 or the communication hole 123, the inflow hole 121 and the outflow hole 122 or the inflow hole 121 and the communication hole 123 are communicated with each other. 12
4 is a screw body 73 screwed onto the screw body 116 so as to communicate with the inflow hole 121;
99 is a check valve interposed between the chuck body 124 and the inlet hole 121, and 99 is a high-pressure pipe connection portion threaded onto the chuck body 116 so as to communicate with the outflow hole 122. As described above, the high-pressure hand pump 81 with a switching valve is protruded from the upper part of the gantry main body 80 that houses the high-pressure hand pump 81. Pins 126 fixed to the base of the shaft 120 integrally formed with the shaft 118 are two stoppers 125 planted on the surface of the shaft 120 protruding from the shaft 120, and the pin 125 comes into contact with these stoppers 126. This restricts the rotation angle of the knob 118. 65
66 is a high pressure cylinder pushed into the pump body 117 via a retaining screw 127, and 66 is a high pressure cylinder 6.
Plunger slidably inserted into 7, 67
In order to slide the plunger 66 inside the high-pressure cylinder 65, it is an operation lever rotatably pivoted to the lower part of the pump body 117 via a pin 128, and one end of which comes into contact with the lower end of the plunger 66 via a roller 129. The extension lever 100 is fitted to the other end as described above. 130 is a spring disposed between the pump body 117 and the operating lever 67;
0, the operating lever 67 is always pulled upward, and the plunger 66, whose lower end is in contact with the operating lever 67, is located on the lower end side in a normal state. 131 is a fuel reservoir provided at the upper end of the pressure cylinder 65 in the pump body 117; 132 is the fuel reservoir 131 and the fuel tank body 11;
A communication hole 64 is provided in the pump body 117 in order to communicate with the communication hole 123 provided in the fuel reservoir 131. The tip of the plunger 66 inserted into the high pressure cylinder 65 enters. 133 is a discharge hole bored in the pump body 117 so as to communicate with the fuel reservoir 131;
4 is a high pressure joint screwed onto the pump body 117 so as to communicate with the discharge hole 133, and 69 is a pressure regulating valve interposed between the discharge hole 133 and the high pressure joint 134 that opens at a pressure of 80 kg/cm ² . When testing the fuel pump safety valve 25, the pressure regulating valve 69 may cause fuel to leak under no load due to a malfunction in the fuel pump safety valve 25.
When trial handling is performed without attaching the lever 5, the movement of the operating lever 67 is too light and there is a large difference from the load, so in order to prevent the operation of the operating lever 67 from going out of order, approximately 80 kg/cm ² It acts as a relief to keep the pressure on. The switching valve high pressure hand pump 81 having the above configuration is mounted on the mount body 80.
When stored inside, the chuck body 124 is connected to the discharge hole 47 of the plunger pump 41, the high pressure joint 134 is connected to the safety valve set stand 68, and the high pressure pipe connection part 99 protruding from the upper part of the stand main body 80 has a tip. A high-pressure hose 62 is connected to a safety valve housing cylinder 84 that houses the injection valve 1 or the safety valve 15 with a cylinder lid. When sending the fuel discharged from the plunger pump 41 to the high-pressure hose 62 communicating with the injection valve 1 or the safety valve with cylinder lid 15, the cock 118 is connected to the 10th
The inflow hole 121 and the outflow hole 122 are rotated clockwise in the figure, and the L-shaped hole 119 provided in the pot 118 allows the inflow hole 121 and the outflow hole 122 to be
communicate with. Further, the fuel discharged from the plunger pump 41 is transferred to a high pressure hand pump 63 and a pressure regulating valve 69.
In order to send the fuel pump safety valve 25 to the safety valve setting table 68 where the fuel pump safety valve 25 is set, rotate the stop 118 counterclockwise in FIG.
The inflow hole 121 and the communication hole 123 may be communicated with each other through the L-shaped hole 119 provided in the L-shaped hole 119 .

FIGS. 12 and 13 are drawings showing details of the inversion disassembly table 88, which is installed on the upper part of the gantry main body 80 and consists of a base 91 and a rotary table 97. 90 in the figure
89 is a disk-shaped support plate constituting the base 91;
is a bracket that vertically fixes the support plate 90 on the gantry main body 80, and a hole 136 is provided in the center of the support plate 90 through which the shaft 139 of the rotary table 97 passes.
There is also a rotary table 97 at two locations on the outer periphery.
A hook 138 that engages with a notch 137 formed in the rotary plate 92 is rotatably pivotally connected. Reference numeral 92 denotes a disc-shaped rotary plate which is a component of the rotary table 97, 139 a shaft fixed to the center of the rotary plate 92, and 137 the aforementioned four hooks provided at equal positions on the circumference of the rotary plate 92. This is a notch that engages with 138. 93, 94, 95 are the rotating plate 92 and the flat plate 14
The first, second, and third support plates 96 erected through the rotating plate 92 are the fourth support plates 96 erected directly on the rotary plate 92, and the first to fourth support plates 93, 9
4, 95, 96 have arcuate notches 93a, 94a, 95 as shown in FIGS. 14 to 17.
a, 96a are provided respectively, and this notch 9
The injection valve 1 is supported on the first to fourth support plates 93, 94, 95, 96 by fitting the outer periphery of the injection valve 1 into the outer circumferences of the injection valves 3a, 94a, 95a, and 96a. 141 is a spacer interposed between the second support plate 94 and the third support plate 95, and this spacer 141 has a half-ring shape as shown in FIG. 142 is the first support plate 93
and a reinforcing plate interposed between the second support plate 94,
143 is a reinforcing plate fixed to the fourth support plate 96;
44 are second, third and fourth support plates 94, 95,
It is a cylindrical reinforcing tube placed between 96 and 96. 1
Reference numeral 45 designates a clamping plate rotatably pivoted between the second support plate 94 and the third support plate 95 by a pin 146; 145a designates the first to fourth support plates 93 of the clamping plate 145; This notch is provided on the side facing the injection valve 1 supported on the injection valves 94, 95, and 96, and this notch 145a has an arcuate shape along the outer peripheral surface of the injection valve 1. Further, a pin hole 145b is provided on the free end side of the clamping plate 145, which matches the pin holes 94b and 95b provided in the second and third support plates 94 and 95. Board 1
After aligning the pin hole 145b provided in 45 with the pin holes 94b, 95b provided in the second and third support plates 94, 95, the pin holes 94b, 145b,
The clamping plate 145 can be fixed by inserting a locking pin 146 through the locking pin 95b.
The rotary table 97 having the above structure is attached to the substrate 91 by attaching the shaft 139 fixed to the rotary plate 92 of the rotary table 97 to the hole 13 provided in the support plate 90 of the substrate 91.
6 and has a boss 147 at the portion protruding from the hole 136 at the tip of the shaft 139.
This is done by screwing together. In addition, the support of the injection valve 1 on the rotating table 97 is such that the injection valve 1 is supported on the rotating table 97 by the first
After fitting into the notches 93a, 94a, 95a, 96a provided in the fourth support plates 93, 94, 95, 96, the clamping plate 145 is rotated counterclockwise in FIG. This is done by fitting the notch 145a of the clamping plate 145 into the injection valve 1 and fixing the clamping plate 145 with a lock pin 146, as shown by the dashed line in the figure. In addition, to position the rotary table 97 supporting the injection valve 1 in the vertical and horizontal states, two hooks 138 pivotally connected to the support plate 90 of the base 91 can be positioned around the circumference of the rotary plate 92 of the rotary table 97. This is done by engaging two of the four notches 137 provided at the position.

Further, on the rotary table 97 that supports the injection valve 1 described above, a spanner 149 shown in FIG. A support tube 151 is attached to support the cylinder 150 to be moved. The support cylinder 151 is attached between the first and second support plates 93 and 94, and a support pin 152 into which the cylinder 150 fits is fixed to the tip thereof. and cylinder 150 and spanner 1
49 to tighten or remove the cap nut 4, as shown in the dashed line in FIG.
Cap nut 4 of the injection valve 1 supported horizontally by 7
Fit the spanner 149 to the cylinder 150.
One end is engaged with a spanner 149, and the other end is pivotally connected to a support pin 152 fixed to a support tube 151. In this state, the cylinder 150 is expanded using the discharge pressure of the air booster 40 of the fuel valve injection test device, and the spanner 149 is rotated to tighten or remove the cap nut 4.
In addition, when tightening the cap nut 4, the engaging part of the spanner 149 with the cylinder 150 is positioned downward as shown in the figure, and the cylinder 150 is extended.
The spanner 149 is rotated clockwise, and when loosening the cap nut 4, the engagement part of the spanner 149 with the cylinder 150 is positioned upward, and when the cylinder 150 is extended, the spanner 149 is rotated counterclockwise. All you have to do is make it move.

In the above configuration, in order to first test the injection valve 1 using the fuel valve injection test device according to the present invention, the injection valve 1 is removed from the injection box by an inverted disassembly stand 88 installed on the upper part of the gantry main body 80. The nozzle 3 at the tip of the injection valve 1 is supported vertically on the upper part of the injection box 82.
protrude inward. Next, the injection valve 1 and the high-pressure pipe connection portion 99 of the high-pressure hand pump 81 with a switching valve protruding from the upper part of the gantry main body 80 are connected by the high-pressure hose 62. Next, the knob 48 of the high-pressure hand pump 81 with a switching valve is rotated clockwise in FIG.
9. Next, with the injection switching valve 50 positioned as shown in FIG. 4, air from the air source 51 is sent to the injection switching valve 50. Then, the air passes through the injection switching valve 50 and enters the second air cylinder 43.
Air flows into the air cylinder 43 through the intake/exhaust hole 53, causing the piston 55 to slide to the right in FIG. Therefore, the plunger 42 of the plunger pump 41 connected to the piston 55 also slides to the right in FIG.
The fuel stored inside is sucked in. At this time, the air discharged to the atmosphere from the first intake/exhaust hole 49 of the air cylinder 43 is exhausted through the throttle slit 57 and the first muffler 52 with large exhaust resistance, so the piston 55 of the air cylinder 43 is Move at low speed. When the piston 55 reaches the right end, the injection switching valve 50 is switched in the opposite direction to that shown in FIG.
Air is supplied into the air cylinder 43 to move the piston 55 to the left in FIG. Then, the plunger 42 connected to the piston 55 also moves to the left in FIG. 4, and the fuel sucked into the high pressure cylinder 107 of the plunger pump 41 is discharged from the discharge hole 47. At this time, the second air cylinder 43
The air discharged to the atmosphere from the intake/exhaust hole 53 is
The piston 5 of the air cylinder 43 is exhausted because it is exhausted through the second muffler 54 with low exhaust resistance.
5 moves at high speed, and fuel is discharged from the plunger pump 41 at high pressure and high speed. The fuel discharged from the plunger pump 41 is then transferred to the high pressure hose 6 from the switching valve 48 of the high pressure hand pump 81 with switching valve.
2 to the injection valve 1, and the injection valve 1 is tested.

Next, a case will be described in which the cylinder lid safety valve 15 is tested using a fuel valve injection test device. In this case, the safety valve 15 with a cylinder lid is housed in the safety valve test cylinder 84 installed in the injection box 82, and the high-pressure hose 62 is connected at one end to the high-pressure pipe connection part 99 of the high-pressure hand pump 81 with a switching valve. The other end is connected to the high pressure pipe connection part 87 of the safety valve test cylinder 84, and the high pressure hose 62 and the inflow hole 17a of the cylinder lid safety 15 are communicated. After that, fuel is supplied to the high pressure hose 62 in the same manner as described above, and the cylinder lid safety valve 15 is tested.

Next, a case where the fuel pump safety valve 25 is tested using the fuel injection test device will be described. In this case, first, attach the fuel pump safety valve 2 to the safety valve set base 68 installed on the top of the gantry main body 80.
Set 5. Next, the handle 118 of the high-pressure hand pump 81 with a switching valve is rotated counterclockwise in FIG. 10 to communicate the discharge hole 47 of the plunger pump 41 and the fuel reservoir 131 of the high-pressure hand pump 81 with a switching valve. In this state, when fuel is discharged from the discharge hole 47 of the plunger pump 41 in the same manner as described above, the fuel is discharged from the high-pressure hand pump 8 with a switching valve.
The fuel flows into the fuel reservoir 131 from the first switching valve 48 .
After pushing down the plunger 66 whose tip protrudes into the fuel reservoir 131 to the lower end, the check valve 13
5 is opened, and the high-pressure joint 134 of the high-pressure hand pump 81 with a switching valve passes through the safety valve set base 68 and reaches the inflow hole 26a of the fuel pump safety valve 25. At this time, since the pressure of the fuel discharged from the plunger pump 41 is less than 600 kg/cm ² , the fuel pump safety valve 25 does not open. In this way, the fuel flows into the inlet hole 26a of the fuel pump safety valve 25.
When the lever 129 is reached, the extension lever 100 fitted to the operating lever 67 of the high-pressure hand pump 63 with a switching valve is pushed down, and one end of the operating lever 67 and the roller 129 are pushed down.
The plunger 66 that is in contact with the pump is pushed upward, the tip of the plunger 66 is press-fitted into the fuel reservoir 131, and the fuel is pressurized to 1200 kg/cm ² to test the fuel pump safety valve 25.

Furthermore, as a result of testing the injection valve 1 using the above method, it became necessary to adjust the injection valve 1, and it became necessary to loosen the cap nut 4 that fixes the nozzle 3 of the injection valve 1 to the valve body 2. Sometimes, the rotating table 97 of the reversing disassembly table 88 supporting the injection valve 1 is rotated by 90 degrees,
After the injection valve 1 is in the horizontal state, tighten the cap nut 4 using the spanner 149 and cylinder 150 as described above.
All you have to do is loosen it. Also, when tightening the cap nut after adjusting the injection valve 1, use the spanner 14.
9 and cylinder 150 may be used.

E. Effects of the Invention As described above, when fuel is supplied to an injection valve by an air booster consisting of an air cylinder and a plunger pump, and the plunger of the plunger pump moves in a direction in which the air cylinder discharges fuel. By moving the plunger at high speed, fuel can be supplied to the injector at high pressure and high speed. Therefore, it becomes possible to accurately and reliably test injection valves that inject fuel at higher pressure and higher speed than before as an energy saving measure. In addition, a switching valve that switches the supply direction of fuel discharged from the plunger pump and a high-pressure hand pump that further pressurizes the fuel discharged from the plunger pump and then supplies it to the fuel pump safety valve are integrated, and are installed inside the mount body. By incorporating it, the fuel valve injection test equipment can be downsized.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an example of an injection valve, FIG. 2 is a sectional view showing an example of a safety valve with a cylinder lid, and FIG. 3 is a sectional view showing an example of a safety valve for a fuel pump. FIG. 4 is a system diagram of a fuel valve injection test device according to the present invention, FIG. 5 is a front view of the fuel valve injection test device, FIG. 6 is a side view, and FIG. 7 is a plan view. Figure 8 is a sectional view of the safety valve test cylinder, Figure 9 is a sectional view of the air booster, Figure 10 is a front sectional view of the high-pressure hand pump with switching valve, and Figure 11 is a side sectional view of the high-pressure hand pump with switching valve. 12 is a plan view of the inversion separation table, FIG. 13 is a front view of the inversion separation table, and FIGS. 14 to 17 are drawings showing the shape of the support plate,
FIG. 18 is a drawing showing the shape of a spacer, and FIG. 19 is a drawing showing the shape of a spanner. 1... Injection valve, 15... Safety valve with cylinder lid,
25... Safety valve for fuel pump, 40... Air booster, 41... Plunger pump, 43... Air cylinder, 45... Fuel tank, 48... Switching valve, 50... Injection switching valve, 51... Air source ,
63...High pressure hand pump.

Claims (1)

[Claims] 1. An air booster consisting of a plunger pump that supplies fuel at a predetermined pressure to a fuel valve, an air cylinder for driving the plunger pump, and an injection switching valve for switching the supply direction of air supplied to the air cylinder. , an air source for supplying air to the air cylinder via the injection switching valve; a fuel tank for storing fuel supplied to the fuel valve by the plunger pump; and a fuel tank for storing fuel to be discharged from the discharge hole of the plunger pump. A fuel valve injection test device comprising a switching valve for switching the direction of fuel supply and a high-pressure hand pump that further pressurizes the fuel discharged from the plunger pump to a predetermined pressure.