JPS60101270A - Fuel valve injection test device - Google Patents

Abstract

PURPOSE:To test an injection valve or safety valve accurately and reliably, in Diesel engine for large vessel, by feeding fuel through an air booster comprised of an air cylinder and plunger pump. CONSTITUTION:Fuel is fed to an injection valve 1 through an air booster 40 comprising an air cylinder 43 and plunger pump 41. When moving the plumger 42 in delivery direction by means of the air cylinder 43, it is moved with high speed to enable accurate and reliable test of injection valve 1 for injecting with high pressure and speed and safety cover 15 having cylinder cover 15. While an exchange valve 48 for exchaning fuel supply from the plunger pump 41 and a high pressure hand pump 63 for pressurizing fuel and supplying to safety pump 25 for fuel pump are integrated to reduce the size of injection valve testing system.

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. Conventional technology 5 In ships equipped with large diesel engines of the ulzer type, fuel injection tests are carried out to test and adjust the operating conditions of spare injection valves, safety valves with cylinder lids, and safety valves for fuel pumps that are normally installed on diesel engines. The equipment is on board. 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 the valve body, (3) is the nozzle fixed to the tip of the valve body (2) via a cap nut (4), and (5) is the valve body (2) and the nozzle (3). Hole (2a) (la)
It is a needle that is slidably housed inside. 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). The tip of the needle (5) is pressed against the valve seat (3b) by the spring (6).
is in pressure contact with. The pressing force of the spring (6) can be adjusted using a bolt (7) threaded onto the valve body (2). (8) is a fuel supply hole for supplying fuel into the pressure reservoir (3c) provided in the nozzle (3);
) is a circulation valve communicating with the oil supply hole (8), and the circulation valve (9) is connected to the oil supply hole (8).
It is designed to open with a weak pressure of about 0 kg/cl.

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). ), the circulation valve (9) is opened by applying pressure to the oil supply hole (8), which communicates with the circulation valve (9).
) into the pressure reservoir (3c). At this time, the air in the oil supply hole (8) and pressure reservoir (3c) flows through the nozzle (3) and the hole (3a) (2a) provided in the valve body (2).
and the needle (5) inserted into the hole (3a) (2a).
) is discharged to the outside through a drain 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, and fuel is injected from the small hole (3d) provided at the tip of the nozzle (3).

Fig. 2 is a drawing showing an example of a safety valve (15) with a cylinder lid. A nozzle (I7) having an inflow hole (17a) and a discharge hole (17b) for fuel loaded therein, a needle (1 day) inserted into the nozzle (17), and a needle (18) for pressing the needle (18) with a predetermined pressure. , and a bolt (20) for storing the spring (19) in the valve body (16). Then, the pressure of the fuel flowing into the inflow hole (17a) is a predetermined value (approximately 200 kg/cd).
When the above temperature is reached, the needle (18) is pushed up against the elastic force of the spring (19), the valve opens and the discharge hole (
17b) to allow the fuel to escape to the outside.

FIG. 3 is a drawing showing an example of a fuel pump safety valve (25), and the safety valve (25) shown in this figure is a valve body (
26) and an inflow hole (26a) provided in the valve body (26).
In order to occlude the needle (
27), 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 (30) for pressing the needle (27) into the inflow hole (26a) through the supporter (29) having a steel ball (28); In order to store it in the upper part, it is constituted by a spring retainer (3I) screwed onto the upper part of the valve body (26). When the pressure of the fuel flowing into the inflow hole (26a) reaches a predetermined value (approximately 1200 kg/cA) or more, the needle (27) is pushed up against the elastic force of the spring (3o). ) (27a) The main body of the valve (26)
The fuel is discharged to the outside through the discharge hole (26b) provided in the.

By the way, the 5ulzer type diesel engine equipped with the above-mentioned injection valve (1), safety valve with cylinder lid (15), and fuel pump safety valve (25) has recently been equipped with energy saving measures. Along with this, fuel injected from the injection valve (1) 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/- to about 350 kg/crl.

However, as the pressure and speed of the injection valve (1) increases, conventional fuel injection test equipment
) is not able to apply sufficient pressure, which makes it impossible to perform accurate tests.

In addition, the fuel valve injection test device described in Section 2 is also equipped with a mechanism that supplies fuel (J4) at a high pressure of 1200 kg/cJ to the fuel pump safety valve (25), but this mechanism normally only supplies a small amount of fuel. Therefore, it is not possible to perform an injection test of the injection valve (1) using this mechanism.

1. 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 that is also capable of accurately testing the operation of cylinder lid safety valves and fuel pump safety valves. This is what we provide.

C1 Structure of the Invention The fuel valve injection test device includes an air booster consisting of a plunger pump that supplies fuel at a predetermined pressure to the fuel valve, an air cylinder for driving the plunger pump, and an air booster that supplies the air to the air cylinder. an injection switching valve for switching the supply direction of the injection switching valve, an air source for supplying air to the air cylinder via the injection switching valve, and a fuel tank that stores the fuel supplied to the fuel valve by the plunger pump; It consists of 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.

2. Embodiment FIG. 4 is a system diagram showing the circuit configuration of the fuel valve injection test device according to the present invention. In the figure, (4o) indicates the injection valve (1), the safety valve with cylinder lid (15), and the fuel pump safety valve (2).
Plunger pump (41) for pumping fuel to 5)
and plunger (42) of plunger bong 7' (41)
This is an air booster consisting of an air cylinder (43) for reciprocating. The air booster (4o)
The suction hole (44) provided in the plunger pump (41) is connected to a fuel tank (45) containing fuel to be pumped to the injection valve (1), the safety valve with cylinder lid (15), and the fuel pump safety valve (25). It communicates with the oil filter (46), and the discharge hole (47) is connected to the plunger pump (41).
) is connected to a switching valve (48) for switching the supply direction of fuel discharged from the fuel tank. Also air booster (40)
The first intake and exhaust hole (4) provided in the air cylinder (43) of
9) is an air source (5) via an injection tr) switching valve (50).
1) or connected to the first muffler (52), and also connected to the second muffler (52)
The intake and exhaust holes (53) are connected to an air source (51) or a second muffler (54) via an injection switching valve (50). When the injection switching valve (50) is located in the illustrated state, the first intake/exhaust hole (49) is located at the first
muffler (52), and the second intake/exhaust hole (53).
is connected to the air source (51), the cylinder (55) of the air cylinder (43) slides to the right in the figure, and the piston rod (56) of the air cylinder (43)
The plunger (4) of the plunger pump (41) connected to
2) Slide in the suction direction (to the right in the figure). Also, when the injection switching valve (50) is located in the opposite direction to that shown in the figure, the first
The intake/exhaust hole (49) is connected to the air source (51), and the second
By connecting the intake/exhaust hole (53) of the air cylinder (43) with the second (7) seventh fuller (54), the cylinder (55) of the air cylinder (43) slides to the left in the figure, and the air cylinder (4
3) Slide the plunger (42) of the plunger pump (41) connected to the piston rod (56>) in the discharge direction (to the left in the figure).
(52) is smaller than the second muffler (54), and has greater exhaust resistance than the second muffler (54). A restrictor sulin l-(57) is interposed between 5o) and 5o). Therefore, when switching the injection switching valve (50) to move the piston (55) of the air cylinder (43) back and forth, when the piston (55) slides the plunger + (42) of the plunger pump (41) in the discharge direction, The plunger (42) moves at high speed and the piston (55)
When sliding the plunger (42) in the suction direction, the first muffler (52) and the throttle slit (57
) is made to move at low speed due to the exhaust resistance of
The plunger pump (41) is designed to ensure fuel suction and at the same time discharge the sucked fuel at high speed.

Also, the air booster (40) has a maximum capacity of 700 kg/cd when the air pressure from the air source (51) is 7 k[/cd].
The dimensions of each member are determined in advance so as to generate a pressure of cll. (58) (59) (60) (61) is an air filter, air regulator, safety valve, and oiler interposed between the air source (51) and the injection switching valve (50), and the oiler (61) This is to supply lubricating oil to the air booster (4o) using an air circuit. (62) is a high pressure hose connected to one outflow hole of the switching valve (48), and by connecting the tip of the high pressure hose (62) to the injection valve (1) or the safety valve with cylinder lid (15), The discharge hole (47) of the plunger pump (41) and the injection valve (1) or the safety valve with cylinder lid (
15).

(63) is the other outflow hole of the switching valve (48) and the check valve (63).
4), and the high-pressure hand pump (63) is connected to a high-pressure cylinder (65),
Plunger (66) housed in high pressure cylinder (65)
and an operating lever (67) for manually reciprocating the plunger (66). Then, the fuel that is pressure-fed 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). After that, it is discharged from the discharge hole. Incidentally, regardless of the discharge pressure number J from the high-pressure hand pump (63) and the pressure of the fuel sent from the plunger pump (41) to the high-pressure hand pump (63), it can be set to, for example, 1200 kg/C1l+. (68) is a safety valve socket connected to the high pressure hand pump (63) via a pressure regulating valve (69), and the safety valve for the fuel pump (25) is connected to the safety valve socket (68).
By setting , the high pressure hunt pump (63) and the fuel pump safety valve (25) are connected. (70) is an air pressure needle that measures the pressure of air supplied from the air source (51); (71) is a first high-pressure pressure gauge that measures the discharge pressure of fuel discharged from the plunger pump (41); (72) is a high pressure hand pump (6
3) is a second high-pressure pressure gauge that measures the discharge pressure of fuel discharged from the second high-pressure pressure gauge, and the second high-pressure pressure needle (72) is attached to the upper part of the safety valve center base (68). Also, in the figure (73) 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 (8o) is the main body of the fuel valve injection test device, and inside the main body (80) is an air booster (4
0), injection switching valve (50), air filter (5B
), air regulator (59), pressure regulating valve (60)
, oiler (61) is built-in, and the switching valve (48) in Fig. 4, high pressure hand pump (63), i
A high-pressure hand pump (81) with a switching valve that integrates a pressure valve (69) and two check valves (64) and (73) is built-in. Furthermore, 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 (63). ) and air regulator (59)
Operation lever (48a) (50a) for operating the
) (67) and the operating handle (59,a) protrude. Furthermore, a safety valve center stand (6) for supporting the fuel pump safety valve (25) is provided on the upper surface of the gantry main body (80).
8) is installation. (82) is an injection valve (1) formed in the frame body (80) and a safety valve (15) with a cylinder lid.
The injection box has a glass window (83) for visually confirming the injection state of the fuel injected from the injection valve (1), which is tested by the fuel valve injection test device. The nozzle located at the tip (3
) protrudes into the injection box (82).
2) It is supported in an upright position above. 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 test cylinder (84) has a cylindrical shape with a bottom as shown in Fig. 8, and its lower end is connected to the safety valve (15) with a cylinder lid.
) has a shape that almost matches the nozzle (17) located at the tip, and communicates with the inlet hole (17a) of the nozzle (17) and the discharge hole (17) of the nozzle (17).
An aperture (86) corresponding to b) is provided. Further, a high pressure pipe connection part (87) communicating with the through hole (85) is provided at the lower side of the safety valve test tube (84), and a plunger pump (41) and a plunger pump (41) are connected to the high pressure pipe connection part (87). Switching valve (
Fuel is supplied to the inflow hole (17a) of the cylinder-covered safety valve (15) by connecting one end of the high-pressure hose (62) that communicates through the cylinder-covered safety valve (15).

(88) supports the injection valve (1) in an upright state above the injection box (82), and when the injection valve (1) requires adjustment, the injection valve (1) is mounted on the mount body (80). This is an inverted disassembly stand attached to the upper part of the gantry main body (80) to support it in a horizontal state.

The inversion part M stand (88) has a disc-shaped support plate (89).
) and a bracket (9o) for vertically fixing the support plate (89) on the frame body (8o).
), a rotary plate (92) rotatably pivoted to the support plate (89) of the base (91), and a rotary plate (92) for supporting the injection valve (1) erected on the rotary plate (92). The first to fourth support plates (9
3) Turntable (9) consisting of (94) (95) (96)
7). And the turntable (97)
With the injection valve (1) placed on top, turn the rotary table (97) into the
By rotating the injection valve (1) by 0", the injection valve (1) is attached to the mount body (
8o) It is designed so that it can be held in two positions, a vertical position and a horizontal position. (45) is a fuel tank disposed at the bottom of the injection box (82), and the fuel tank (45) stores fuel to be supplied to the injection valve (1) or the safety valve with cylinder lid (15), and at the same time, the fuel tank (45) is used for injection. The fuel injected from the valve (1) or the safety valve with cylinder lid (15) is recovered. (9th) is an air source connection port provided at the bottom of the pedestal body (8o) for connecting the air booster (40) and an air source (51) such as an air blender, and (99) is the air source connection port provided at the bottom of the pedestal body (8o). This is a high-pressure pipe connection part that communicates with the outflow hole of the switching valve (48) provided at the top of The injection valve (1) set in the box (82)
) or by connecting it to the high pressure pipe connection part (87) of the safety valve test cylinder (84) that houses the safety valve with cylinder lid (15), the injection valve (1) or the safety valve test cylinder (84)
The fuel discharged from the air booster (40) is supplied to a safety valve (15) with a cylinder lid housed inside. (100) is the high pressure hand pump operating lever (67
), and this extension lever (100) is
When operating the high-pressure hand pump (63), the high-pressure hand pump (63) is fitted into the operating lever (67) of the high-pressure hand pump (63) as shown in FIG. 6, and the operating lever (67) is easily operated. When not in use, the mount body (8
0) to prevent the long lever from protruding from the front of the gantry main body.

FIG. 9 is a drawing showing details of the air booster (40) consisting of the above-mentioned air cylinder (43) and plunger pump (41). In the figure, (101) is the cylinder of the air cylinder (43) that houses the piston (55) and piston rod (56), (102) (103)
are cylinder heads attached to both end openings of the cylinder (101), and the cylinder head (102) (10
3) is provided with the first intake/exhaust hole (49) and the second intake/exhaust hole (53) described above. (104) is a guide tube whose one end is fitted into the cylinder head (102>);
5) is a hair pronk fitted with the other end of the guide tube (104"), and the pace block (105") is fitted with the other end of the guide tube (104'').
) and the guide tube (104) have stud bolts (106) whose tips are screwed into the cylinder head (102').
Fixed by (107) is a high-pressure cylinder that is screwed into the pace block (105), and inside the high-pressure cylinder (107) is a plunger (
42) has been inserted. (109) is a high pressure cylinder (
107) is a hend block fitted to the tip of
The hemlock (109) is provided with a suction hole (44) and a discharge hole (47) for fuel *4, and a check valve (110) is provided inside to prevent backflow of fuel. ) (
111) is stored.

(112) is the locking plate with the head bolt (113) threaded onto it, and (114) is the head bolt (1) 3 >
The lock nut (115) is a connecting bolt that passes through the locking plate (112), and the locking plate (112), head bolt (113), lock nut (114), and connecting bolt (115) are used to lock the high pressure cylinder. (10
7") and head block (109) are fixed. Then, the piston (55) of the air cylinder (43) is reciprocated, and the plunger (42) is moved inside the high pressure cylinder (107).
) is reciprocated to suck in and discharge fuel.

Figures 1O and 11 are the switching valve (4B) shown in Figure 4.
, high pressure hand pump (63), tlla pressure valve (69)
) and two check valves (64) (73) are integrated into a high-pressure hand pump (81) with a switching valve. Drawing (116) shows a cock body for configuring a switching valve (4 days), (117) shows a pump body for configuring a high-pressure hand pump (63), and the cock body (
116) and the pump body (117) are integrally connected by bolts. (118) 1 body (1
(119) is a 5-shaped hole drilled in an L-shape in the cock (11B), (119) is rotatably inserted into the cock (16)
20) is a shirt integrally formed with the cock (11B)]
, (48a) is an operating lever fixed to the tip of the shaft (120) for rotating the cock (118). (121) is an inflow hole drilled in the cock body (116), (122) is an outflow hole, and (123) is a communication hole. are arranged so that they each form a right angle.

Then, rotate the cock (11B) 90°, and
One open end of the five-shaped hole (119) provided in 11B) is used as the inflow hole (121), and the other open end is used as the outflow hole (122).
Alternatively, by connecting to the communication hole (123:), the inflow hole (121) and the outflow hole (122), or the inflow hole (1
21) and the communication hole (123).

(124) is a chafuki body screwed onto the cock body (11G) so as to communicate with the inflow hole (121), and (73) is a chafuki body (124) and the inflow hole (1).
The check valve (99) is interposed between the outflow hole (21) and the outflow hole (99).
The cock body (116) is in communication with the cock body (122).
) is a high-pressure pipe connection screwed onto the high-pressure pipe connection (
99) is a high-pressure hand pump with switching valve (8
1) so as to protrude from the upper part of the gantry body (80) that houses the holder. (125) is a bottle (125) fixed to the base of a shaft (120) integrally formed with a cock (118).
6) is the cock body (116) surface shirt) (1
20) are two stop bars installed on the protruding surface, and by contacting the stopper (126) with the bottle (125), the rotation angle of the cock (118) is regulated. (65) is a high-pressure cylinder that is firmly inserted into the pump body (117) via 127), (66) is a plunger that is slidably inserted into the high-pressure cylinder (67), and (67) is a plunger (66) that is inserted into the high-pressure cylinder (67). The pump body (
117) via a bottle (128), and one end of which is connected to the roller (129).
The lower end of the plunger (66) is in contact with the lower end of the plunger (66), and 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), and the operating lever (67) is pulled upward by this spring (130). The plunger (66), whose lower end is in contact with the plunger (66), is located on the lower end side in the fully loaded state. (131) is the pump body (117'
) The fuel reservoir (132) provided at the upper end of the pressure cylinder (65) in ) communicates the fuel reservoir (131) with the communication hole (123) bored in the cock body (116). A communication hole (64) is a check valve interposed at the connection part of the communication hole (123><13S) formed in the pump body (117), and inside the fuel reservoir (131),
Plunger (66) inserted into high pressure cylinder (65)
The tip of the tube enters.

(133) is a discharge hole bored in the pump body (117) so as to communicate with the fuel reservoir (131); (134)
(69) is a high pressure joint screwed onto the pump body (117) so as to communicate with the discharge hole (133), and (69) is a high pressure joint 80 interposed between the discharge hole (133') and the high pressure joint (134). kg/cd (D) This is a pressure regulating valve that opens at pressure. This pressure regulating valve (69) is
Fuel pump safety valve (25) During the test, the fuel pump safety valve (25)
25) is malfunctioning, causing fuel to leak under no load, or when trial handling is performed without installing the fuel pump safety valve (25), the movement of the operating lever (67) is too light and the fuel leaks under no load. In order to prevent the operating lever (67) from going out of order due to the large difference, it acts as a relief to keep a pressure of about 80 kg/- constantly applied. When storing the high-pressure hand pump (81)' with a switching valve configured as described above in the pedestal main body (8o), insert the check body (12,i) into the discharge hole (47) of the plunger pump (41) for high pressure. (134) to the safety valve center stand (6B), and the stand body (80)
The high-pressure pipe connection part (99) protruding from the upper part of the high-pressure port (6) is connected to a safety valve storage cylinder (84) that stores a tip force injection valve (1) or a safety valve with a cylinder lid (15).
2) is connected. 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), turn the cock (11B) clockwise in Fig. 10. The inflow hole (121) and the outflow hole (122) are communicated with each other by the L-shaped plate (119) provided on the cock (118). In addition, the fuel *-1 discharged from the plunger pump (41) is passed through a high-pressure hand pump (63) and a pressure regulating valve (69) to a safety valve (25) for the fuel pump. To feed the water, turn the cock (11B) counterclockwise in Fig. 10, and connect the inflow hole (121) and the communication hole (1
23).

12th [i! ! 1 and 13 are drawings showing details of an inversion disassembly table (88) consisting of a base (91) and a rotating table (97), which is installed on the upper part of the gantry main body (80). In the figure, (90)↓ is a disk-shaped support plate that constitutes the base (91), and (89) is a bracket that vertically fixes the support plate (90) on the pedestal body (80). Board (90)
A hole (136) is provided in the center of the rotary plate (97) through which the rotary plate (139) of the rotating table (97) passes, and a hole (136) is formed in the rotating plate (92) of the rotating table (97) at two locations on the outer periphery. A hook (13B) that engages with the notch (137) is rotatably pivoted. (92) is a disc-shaped rotating plate that is a component of the rotating table (97), and (139) is the rotating plate (92).
), (137) is the rotating plate (
The aforementioned hooks (1
3B). (93) (94)
(95) is the first rotary plate (92) that is erected via a flat plate (140'). The second and third support plates (96) are the fourth support plates installed directly on the rotary plate (92), and the first to fourth support plates (93) (94) (95) ( 9
6), as shown in FIGS. 14 to 17, there are arc-shaped notches (93a > (94a) (95a) (9
6a) are provided respectively, and this notch (93a
) (94a) (95a) (96a) by fitting the outer periphery of the injection valve (1) into the injection valve (1).
the first to fourth support plates (93) (94) (95)
(96) It should be supported above.

(141) is the second support plate (94) and the third support plate (9
5), and this spacer (141) has a half-ring shape as shown in FIG. (142) is the first support plate (93) and the second support plate (
94), (143) is a reinforcing plate fixed to the fourth support plate (96), and (144) is the second
, third and fourth support plates (94) (95) (96)
This is a cylindrical reinforcing tube placed in between. (145) is a clamping plate rotatably pivoted between the second support plate (94) and the third support plate (95) by means of a pin (146);
145a) is a notch provided on the side of the holding plate (145) facing the injection valve (1) supported on the first to fourth support plates (93) (94) (95) (96). This notch (145a) is formed in an arc shape along the outer peripheral surface of the injection valve (1). Further, the free end side of the clamping plate (145) is provided with a pin hole (145b) that matches the pin holes (94b) (95b) provided in the second and third support plates (94) (95). , by rotating the clamping plate (145), the pin holes (145b) provided in the clamping plate (145) and the pin holes (94b) (95b) provided in the second and third support plates (94) (95) By inserting the lock pin (146) into the pin holes (94b), (145b), and (95b), the clamping plate (14) is aligned.
5) so that it can be fixed. The rotary table (97) having the above configuration is attached to the base plate (91).
The shaft (139) fixed to the rotating plate (92) of 7) was inserted into the hole (136) provided in the support plate (90) of the substrate (91), and the shaft (139) protruded from the hole (136) at the tip. Oak l-(14B) with boss (147) in part
). In addition, the injection valve (1) is supported on the rotating table (97) by supporting the injection valve (1) on the rotating table (97).
) first to fourth support plates (93) (94) (95)
Notches (93a) (94a) provided in (96)
(95a) After fitting to (96a), the clamping plate (
145) in the counterclockwise direction in FIG. 13, and the notch (14
5a) is fitted into the injection valve (1), and the clamping plate (145) is fixed with the lock pin (146). In addition, the positioning of the rotary table (97) supporting the injection valve (1) in the vertical and horizontal positions is performed using the support plate (91) of the base (91).
The two hooks (138) pivotally connected to the rotary table (90)
This is done by engaging two of the four notches (137) provided at equidistant positions on the circumference of the rotary plate (92) of 97).

In addition, when tightening and removing the cap nut (4) attached to the tip of the injection valve (1) which is supported in a horizontal state, the rotary table (97) that supports the injection valve (1) mentioned above is installed. A cylinder (
150) is attached. 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. . And Sirishida (150) and spanner (14)
To tighten or remove the cap nut (4) using the cap nut (9), as shown in the dashed line in FIG. (4) with a spanner (149), and the cylinder (150).
One end is engaged with a spanner (i49), 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 the cap nut (4) or Perform removal. In addition, when tightening the cap nut (4), use a spanner (14) as shown in the figure.
When the engagement part with the cylinder (150) of 9) is positioned downward and the cylinder (150'') is extended, the spanner (14)
9) rotates clockwise, and then tighten the cap nut (4).
When loosening the cylinder (150) of the spanner (149),
) may be positioned upward so that when the cylinder (150) is extended, the spanner (149) rotates counterclockwise.

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 (]) is placed on an inverted disassembly stand ( 88) is vertically supported on the upper part of the injection box (82), and the nozzle (3) at the tip of the injection valve (1) is mounted on the injection box (82).
protrude inward. Next, the injection valve (1) and the mount body (80)
A high-pressure pipe connection part (99) of a high-pressure hand pump (81) with a switching valve protruding from the upper part of the pump is connected by a high-pressure hose (62). Next, rotate the cock (48) of the high-pressure hand pump (81) with a switching valve clockwise in FIG.
99).

Next, with the injection switching valve (50) positioned as shown in FIG.
). Then, the air flows into the air cylinder (43) from the second intake/exhaust hole (53) of the air cylinder (43) through the injection switching valve (50), and the air flows into the air cylinder (43) through the injection switching valve (50).
Slide it to the right in Figure 4. Therefore, the piston (
The plunger (42) of the plunger pump (41) connected to the plunger pump (45) also slides to the right in Fig. 4, and the fuel stored in the fuel tank (45) is sucked into the high-pressure cylinder (107). 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. Cylinder (4
The piston (55) of 3) moves at low speed. When the piston (55) reaches the right end, the injection switching valve (5o) is switched in the opposite direction to that shown in FIG. is supplied 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 air discharged to the atmosphere from the second intake/exhaust hole (53) of the air cylinder (43) is directed to the second muffler (5) with low exhaust resistance.
4) to be exhausted through the air cylinder (43)
+7) The piston (55) 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 transferred to the switching valve (48) of the high pressure hand pump (81) with switching valve.
from the high pressure hose (62) to the injection valve (1),
A test of the injection valve (1) is carried out.

Next, a case will be described in which the cylinder lid safety valve (15) is tested using the fuel valve injection test device. In this case, the safety valve test cylinder (82) installed inside the injection box (82)
4) houses a safety valve with a cylinder lid (15), and one end is connected to the high-pressure pipe connection part (9) of the high-pressure hand pump (81) with a switching valve.
Connect the other end of the high pressure port (62) connected to 9) to the high pressure pipe connection part (87) of the safety valve test tube (84), and connect the high pressure hose (62) and the inflow of the cylinder lid safety (15). The hole (17a) is communicated with the hole (17a). After that, fuel is supplied to the high pressure port (62) in the same manner as described above, and the safety valve with cylinder lid (+5) is tested.

Next, the fuel injection test equipment is used to test the fuel pump safety valve (
The case of performing the test 25) will be explained. In this case, first, the fuel pump safety valve (25) is set on the safety valve setting stand (68) installed on the upper part of the gantry main body (80). Next, the cock (
118) counterclockwise in FIG. 10 to communicate the discharge hole (47) of the plunger pump (41) with the fuel reservoir (131) of the high pressure pan 1-pump (81) with switching valve. In this state, when fuel is discharged from the discharge hole (47) of the plunger pump (4I) in the same manner as described above, the fuel is discharged from the switching valve (48) of the high-pressure hand pump with switching valve (81).
) into the fuel reservoir (131). And the fuel reservoir (
131), the plunger (66) whose tip protrudes into the inside of
It passes from the port (134) through the safety valve set stand (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/crl, the fuel pump safety valve (25) does not open. In this way, the fuel becomes the fuel; the inflow hole (
26a), the high pressure hand pump with switching valve (6
The extension lever (10) fitted into the operation lever (67) of 3)
0) is pressed down, and the plunger (66) is in contact with one end of the operating lever (67) via the roller (129).
Push up and insert the tip of the plunger (66) into the fuel reservoir (
131) and pressurize the fuel to 1200 kg/aJ.
Test the fuel pump safety valve (25) by pressurizing the fuel pump.

Also, as a result of testing the injection valve (1) using the above method, it became necessary to open the injection valve (1), and the nozzle (3) of the injection valve (1) was fixed to the valve body (2). Bag nuts (4)
), when it becomes necessary to loosen the injection valve (1), rotate the rotary table (97) of the inverting disassembly table (88) supporting the injection valve (1) by 90 degrees to bring the injection valve (1) to a horizontal position, and then As described above, the bag naso 1-(4) can be graded using the spanner (149) and cylinder (150). Furthermore, after the adjustment of the injection valve (1) is completed, the spanner (149) and cylinder (150) may be used when tightening the cap nut.

As described in 1. Effects of the invention, the air booster consisting of an air cylinder and a plunger pump supplies fuel 1 to the injection valve (
If Jti is supplied and the plunger of the plunger pump moves at high speed when the plunger moves in the direction of discharging fuel by the air cylinder, fuel can be supplied to the injection valve at high pressure and high speed. Therefore, as an energy saving measure, fuel is injected at higher pressure and higher speed than before. 1; It becomes possible to accurately and reliably test the new injection valve. 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. Fig. 12 is a plan view of the inversion separation table, Fig. 13 is a front view of the inversion separation table, Figs. 14 to 17 are drawings showing the shape of the support plate, and Fig. 18 is a drawing showing the shape of the spacer. , FIG. 19 is a drawing showing the shape of the 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 hunt pump. Patent Applicant Fuji Techno Kogyo Co., Ltd. Agent Sho Ehara Hidetoshi Ehara Figure 1 @2 Figure No. 3 Figure 5

Claims (1)

[Claims] (11) An air booster consisting of a plunger pump that supplies fuel at a predetermined pressure to the 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 discharged from the discharge hole of the plunger pump. a switching valve to switch the supply direction of the plunger pump, and a high-pressure/
A fuel valve injection test device comprising a pump and a pump.