Device and method for disassembling and assembling a starter metering valve

Abstract

The present invention discloses a device and method for disassembling and assembling a starter metering valve, which relates to the field of aircraft engine parts assembly. The purpose is to reduce the difficulty and risk of disassembling and assembling the starter metering valve and improve work efficiency. The technical solution adopted by the present invention is as follows: the device for disassembling and assembling the starter metering valve includes a base plate, a positioning seat fixedly arranged on the base plate, and a pushing mechanism. The positioning seat includes two mutually parallel plates, and the two plates are respectively provided with a first slot and a second slot. The pushing mechanism includes a push rod, and the pushing direction of the push rod points to the second slot and passes through the first slot and the second slot. The bushing of the starter metering valve is placed in the first slot and the second slot, and then the starter metering valve is disassembled and assembled. The outer side of the bushing of the starter metering valve has a ridge structure. The bushing is clamped in the positioning seat, so that the bushing can be locked by the positioning seat in the pushing direction of the push rod. The pushing mechanism pushes the valve, and the stroke is easy to fix and control, achieving smooth and accurate pushing.

Description

Technical Field

[0001] The present invention relates to the field of aircraft engine parts assembly, in particular to a device for disassembling and assembling a starting metering valve of a nozzle afterburner regulator, and a method for disassembling and assembling the starting metering valve by using the device. Background Art

[0002] The nozzle afterburner regulator is a widely used control accessory on turbofan engines with afterburner. It controls the tail nozzle throat during engine startup and full afterburner operation. Each nozzle afterburner regulator includes a set of starting metering valves. These valves regulate the fuel flow in the afterburner starting manifold according to the instructions of the electronic controller and control the on / off of the afterburner fuel pump via the annular grooves on the valves. The starting metering valves are connected to the linear displacement sensor actuator, which drives the linear displacement sensor actuator during operation. The linear displacement sensor provides a signal to the electronic controller, which analyzes the data and accurately controls the fuel supply to the afterburner to ensure engine performance.

[0003] For the starting metering valve, the disassembly and assembly of the starting metering valve is currently carried out by manual pressing, which requires two operators to cooperate with each other. One operator is mainly responsible for controlling the return spring to be in a contracted state, and the other operator is mainly responsible for the disassembly and assembly of the mover. For ease of description, the end of the valve connected to the mover is marked as the front end of the valve, and the end of the valve close to the return spring is marked as the rear end of the valve. The disassembly method of the starting metering valve is as follows: first, one operator applies a force to the return spring through the rear end of the valve and the bushing, causing the return spring to contract, the valve to extend forward relative to the bushing, and the nut at the front end of the valve to be exposed from the bushing; then, one operator maintains the force on the return spring, and the other operator loosens the nut with an open-end wrench. After the nut is loosened, the mover is disassembled by twisting the mover; finally, the disassembly of the starting metering valve is naturally completed. The assembly of the starting metering valve also uses manual pressing, and the assembly process is the opposite of the disassembly process.

[0004] The starter metering valve is disassembled and reassembled manually by pressing. The key difficulty lies in loosening the nut while maintaining force on the return spring. Due to the spring force of the return spring, there is significant resistance to disassembly and assembly of the actuator, which can cause the return spring to rebound and potentially pinch the operator's fingers. Furthermore, the operator's ability to find the right balance for compressing the return spring is difficult, making manual pressing difficult and the disassembly and assembly success rate low. This delays repair progress and product delivery, and also poses a high risk to the quality of the assembled product.

[0005] Furthermore, due to the structural characteristics of the starter metering valve, it is necessary to measure the distance between the reference surface between the two prongs of the mover and the front face of the valve. Currently, this measurement requires two people, each holding the product and a vernier caliper. Due to the relative vibration of the vernier caliper and the measured point during manual measurement, and the uneven reference surface between the two prongs of the mover, the contact point of the vernier caliper with the reference surface is not fixed each time. Therefore, multiple measurements and averaging are generally used to reduce measurement errors. This increases the number of measurements and adjustments, and increases the time required for each assembly. Summary of the Invention

[0006] The present invention first provides a device for disassembling and assembling a starter metering valve, aiming to reduce the difficulty and risk of disassembling and assembling the starter metering valve and improve the efficiency of the disassembly and assembly process.

[0007] The technical solution adopted by the present invention is: a device for disassembling and assembling a starting metering valve, including a base plate and a positioning seat and a pushing mechanism fixedly arranged on the base plate, the positioning seat including two parallel plates, the two plates respectively provided with a first card slot and a second card slot, the opening directions of the first card slot and the second card slot being consistent, the pushing mechanism including a push rod, the pushing direction of the push rod pointing to the second card slot and passing through the first card slot and the second card slot, the second card slot being located between the pushing mechanism and the first card slot.

[0008] Furthermore, when the bottom plate is placed horizontally, the openings of the first card slot and the second card slot are vertically upward.

[0009] Furthermore: the first card slot is rectangular or U-shaped, the second card slot is divided into a supporting slot close to the first card slot and a limiting slot close to the pushing mechanism, the shape of the supporting slot in the cross section is rectangular at the top and semicircular at the bottom, the limiting slot is in the shape of a major arc in the cross section, the radius of the semicircle of the supporting slot in the cross section is smaller than the radius of the major arc of the limiting slot in the cross section, the line connecting the centers of the semicircles of the supporting slot in the cross section is collinear with the line connecting the centers of the major arc of the limiting slot in the cross section, and the cross section is a section perpendicular to the center line of the second card slot.

[0010] Furthermore, the pushing mechanism includes a push rod, a mounting seat and a rocker arm, the mounting seat is fixedly mounted on the base plate, a through hole is provided on the top of the mounting seat, a first clamping member and a second clamping member are provided on both sides of the through hole of the mounting seat, the clamping member of the mounting seat close to the positioning seat is the first clamping member, the first clamping member and the second clamping member are threadedly connected, the first clamping member and the second clamping member are both provided with through holes, the push rod is passed through the through holes of the first clamping member, the second clamping member and the mounting seat; the second clamping member is rotatably connected to two identical pull plates, the two pull plates are rotatably connected to the rocker arm, and the rocker arm is also rotatably connected to one end of the push rod, and the rotational connection position of the rocker arm-push rod does not coincide with the rotational connection position of the rocker arm-pull plate.

[0011] Furthermore, the pushing end of the push rod is threadedly connected to the adjusting rod, and a fixing nut is arranged on the outer side of the adjusting rod.

[0012] Furthermore, a pressure head is provided at the pushing end of the push rod or the adjusting rod, and the material of the pressure head is preferably PA.

[0013] Furthermore, a watch clip is provided on the bottom plate, and the watch clip is located on the side of the first card slot facing away from the second card slot, and the watch clip is collinear with the first card slot and the second card slot.

[0014] Specifically: the watch clamp is provided with a clamping hole, the clamping hole is provided with an opening slot, the watch clamp is further provided with a screw hole vertically passing through the opening slot, the screw hole passes through the watch clamp, and an adaptive adjusting bolt is provided in the screw hole.

[0015] The present invention also provides a method for disassembling a starter metering valve, the purpose of which is to reduce the difficulty and risk of disassembling the starter metering valve and improve the efficiency of disassembly and assembly. The method for disassembling the starter metering valve, using any of the above-mentioned starter metering valve disassembly and assembly devices, comprises the following steps:

[0016] S1. Operate the push mechanism to put the push rod in a non-pushing state;

[0017] S2. Place the bushing in the first and second slots of the positioning seat, wherein the return spring is located on the side close to the pushing mechanism, and the bushing is locked by the positioning seat in the pushing direction of the ejector rod;

[0018] S3, operate the pushing mechanism to make the push rod push one end of the valve;

[0019] S4. Loosen the nut exposed from the bushing, and then remove the mover by twisting it;

[0020] S5. Operate the push mechanism to put the push rod in a non-pushing state, then remove the bushing from the positioning seat, finally remove the return spring from the outside of the bushing, and remove the valve from the inside of the bushing.

[0021] The present invention also provides a method for assembling a starter metering valve, the purpose of which is to reduce the difficulty and risk of assembling the starter metering valve and improve the efficiency of disassembly and assembly. The method for assembling the starter metering valve, using any of the above-mentioned devices for disassembly and assembly of the starter metering valve, comprises the following steps:

[0022] S1. Install the valve into the bushing and insert the return spring into the bushing for standby use;

[0023] S2. Operate the pushing mechanism to put the ejector rod in a non-pushing state, and then place the bushing in the first and second slots of the positioning seat, wherein the return spring is located on the side close to the pushing mechanism, and the bushing is locked by the positioning seat in the pushing direction of the ejector rod;

[0024] S3, operate the pushing mechanism to make the push rod push one end of the valve;

[0025] S4. Connect the mover to the end of the valve away from the push mechanism and tighten the nut;

[0026] S5. Operate the ejection mechanism to put the ejector rod in a non-pushing state, and then remove the bushing from the positioning seat.

[0027] The beneficial effects of the present invention are as follows: the positioning seat of the starting metering valve disassembly and assembly device is provided with a first card slot and a second card slot, and the first card slot and the second card slot are used to balance and firmly support the bushing of the starting metering valve; the outer side of the bushing of the starting metering valve has a ridge structure, and the bushing is clamped in the first card slot and the second card slot, so that the bushing can be locked by the positioning seat in the pushing direction of the push rod, thereby preventing the bushing from moving along the pushing direction when the push rod pushes the valve, thereby realizing the pushing of the valve by the pushing mechanism. The pushing mechanism is fixed by the pushing direction applied by the push rod, and the stroke is easy to fix and control, which can realize smooth and accurate pushing, avoiding the risk of crushing fingers when pressing the reset spring with bare hands. The pushing mechanism adopts the principle of lever, which can realize easy and labor-saving pushing. The method for disassembling and assembling the starting metering valve is carried out by the above-mentioned device, which reduces the difficulty and risk of disassembly and assembly, improves the efficiency and accuracy of disassembly and assembly, and realizes efficient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the starter metering valve after being placed in the starter metering valve disassembly and assembly device of the present invention.

[0029] Figure 2 yes Figure 1 main view.

[0030] Figure 3 yes Figure 1 Top view.

[0031] Figure 4 yes Figure 1 The three-dimensional structure diagram of the positioning seat.

[0032] Figure 5 yes Figure 4 side view.

[0033] Figure 6 yes Figure 1 3D structural diagram of the mounting base.

[0034] Figure 7 yes Figure 1 3D structural diagram of the watch clip.

[0035] Figure 8 yes Figure 7 The longitudinal section of the watch clip is shown.

[0036] Figure numerals: base plate 1, positioning seat 2, first card slot 21, second card slot 22, support slot 22-1, limit slot 22-2, push rod 31, mounting seat 32, rocker arm 33, first clamping member 34, second clamping member 35, pull plate 36, adjusting rod 37, pressure head 38, watch clamp 4, clamping hole 41, opening slit 42, screw hole 43, adjusting bolt 44. DETAILED DESCRIPTION

[0037] The present invention will be further described below with reference to the accompanying drawings.

[0038] The device for disassembling and assembling the starting metering valve of the present invention is used for disassembling the starting metering valve and also for assembling the starting metering valve. Figures 1 to 3 As shown, the device for disassembling and assembling a starter metering valve according to the present invention comprises a base plate 1, a positioning seat 2 fixedly mounted on the base plate 1, and a push mechanism. The base plate 1, which serves as the mounting base 2 and the push mechanism, is typically a metal plate, such as a steel plate. The base plate 1 can be of any shape, such as a rectangular plate. The base plate 1 can be solid or, to reduce its weight, can be provided with through-slots. Through-holes are provided in the base plate 1 to facilitate bolted connection of the positioning seat 2 and the push mechanism.

[0039] The positioning seat 2 is used to clamp and fix the start-up metering valve. Since the outer side of the bushing of the start-up metering valve is provided with multiple ridges, the positioning seat 2 is provided with two slots to firmly clamp and fix the bushing of the start-up metering valve. Figure 4 and Figure 5 The positioning seat 2 includes two plates parallel to each other, with a connecting plate between the two plates. The connecting plate is provided with two through holes and is fixed to the corresponding positions of the base plate 1 by bolts. The two plates and the connecting plate are a whole. The two plates of the positioning seat 2 are respectively provided with a first card slot 21 and a second card slot 22. The opening directions of the first card slot 21 and the second card slot 22 are consistent, so as to achieve the purpose of placing the bushing into the first card slot 21 and the second card slot 22, and to achieve the purpose of taking the bushing out of the first card slot 21 and the second card slot 22. When the base plate 1 is placed horizontally, the openings of the first card slot 21 and the second card slot 22 can be obliquely upward or vertically upward, preferably vertically upward, such as Figures 1 to 5 shown.

[0040] The pushing mechanism includes a push rod 31, and the axial direction of the push rod 31 is the pushing direction of the push rod 31. The pushing direction of the push rod 31 points to the second card slot 22 and passes through the first card slot 21 and the second card slot 22. The push rod 31, the first card slot 21 and the second card slot 22 are on the same straight line. In order to facilitate the distinction between the first card slot 21 and the second card slot 22, the second card slot 22 is set to be located between the pushing mechanism and the first card slot 21. For the structure of the first card slot 21 and the second card slot 22, it is required that the bushing can be locked at least in the pushing direction of the push rod 31, that is, when the push rod 31 pushes one end of the valve, the bushing will not move relative to the positioning seat 2. A specific embodiment of the positioning seat 2 is provided below.

[0041] See also Figure 4 and Figure 5 The first slot 21 of the positioning seat 2 is rectangular. In addition, the first slot 21 can also be U-shaped. The second slot 22 is divided into a supporting slot 22-1 close to the first slot 21 and a limiting slot 22-2 close to the push mechanism. The cross-section of the supporting slot 22-1 is rectangular at the top and semicircular at the bottom. Figure 5 The support groove 22-1 mainly supports the bushing; the limit groove 22-2 is in the shape of an arc in cross section, see Figure 5 The limiting groove 22-2 mainly prevents the bushing from moving in the axial direction; the radius of the semicircle of the support groove 22-1 on the cross section is smaller than the radius of the major arc of the limiting groove 22-2 on the cross section, and the line connecting the centers of the semicircle of the support groove 22-1 on the cross section is collinear with the line connecting the centers of the major arc of the limiting groove 22-2 on the cross section. Figure 5 The cross section is a cross section perpendicular to the center line of the second slot 22, that is, perpendicular to the center line of the second slot 22. Figure 5 A cross section perpendicular to the viewing direction.

[0042] The push mechanism is used to push the valve toward one end of the return spring, compressing and maintaining the return spring at a certain amount. Simultaneously, the valve extends forward relative to the bushing, exposing the nut at the front end of the valve from the bushing. This facilitates loosening the nut and removing the mover. Therefore, the push mechanism only needs to achieve and maintain a fixed push stroke. The following provides a specific embodiment of the push mechanism, which utilizes the lever principle to achieve a labor-saving effect.

[0043] See also Figures 1 to 3 The pushing mechanism includes a push rod 31, a mounting seat 32 and a rocker arm 33. The mounting seat 32 is fixedly mounted on the base plate 1. For example, two through holes are set in the mounting seat 32, and the mounting seat 32 is fixedly mounted on the base plate 1 by two bolts; a through hole is set on the top of the mounting seat 32 for mounting the push rod 31 and other structures, see Figure 6. A first clamping member 34 and a second clamping member 35 are provided on both sides of the through hole at the top of the mounting seat 32. For easy distinction, the clamping member on the side of the mounting seat 32 close to the positioning seat 2 is marked as the first clamping member 34. The first clamping member 34 and the second clamping member 35 are threadedly connected so that the first clamping member 34 and the second clamping member 35 can be fastened to both sides of the through hole at the top of the mounting seat 32. The first clamping member 34 can be a nut to facilitate connection with the second clamping member 35. Through holes are provided in the middle of the first clamping member 34 and the second clamping member 35. The center lines of the through hole of the first clamping member 34, the through hole of the second clamping member 35 and the through hole at the top of the mounting seat 32 coincide with each other. The push rod 31 is passed through the through holes of the first clamping member 34, the second clamping member 35 and the mounting seat 32, and the push rod 31 can move along the direction of the through hole. The second clamping member 35 is rotatably connected to two identical pull plates 36. The pull plates 36 are rectangular in the middle and semicircular at both ends. The ends of the pull plates 36 are used for rotational connection. For example, through holes are provided at both ends of the pull plates 36 and pins are passed through to achieve rotational connection. The two pull plates 36 are rotatably connected to the opposite sides of the second clamping member 35, for example, the upper and lower sides of the second clamping member 35. Figure 1 and Figure 2 The other ends of the two pull plates 36 are rotatably connected to the rocker arm 33, which is also rotatably connected to one end of the push rod 31. The rotational connection between the rocker arm 33 and the push rod 31 does not overlap with the rotational connection between the rocker arm 33 and the pull plate 36. The rocker arm 33 utilizes the principle of leverage to move the push rod 31 along its axis, achieving a labor-saving effect. The rocker arm 33 operates by rotation, which, in conjunction with the pull plate 36, is converted into linear motion of the push rod 31.

[0044] The push rod 31 of the push mechanism can directly push the valve, or the push end of the push rod 31 can be threadedly connected to the adjustment rod 37, which then pushes the valve. The adjustment rod 37 is used to adjust the push position of the push rod 31. For example, the push end of the push rod 31 is provided with an internal thread, and the adjustment rod 37 is provided with a matching external thread and threadedly connected to the push end of the push rod 31. To prevent relative movement between the adjustment rod 37 and the push rod 31, a fixing nut is provided on the outer side of the adjustment rod 37.

[0045] When the push rod 31 of the push mechanism directly pushes the valve, a pressure head 38 may be provided at the pushing end of the push rod 31. The pressure head 38 serves to isolate and protect the valve, preventing damage to the valve caused by the push rod 31. The material of the pressure head 38 is preferably PA, which effectively protects the valve from scratches and abrasions. The pressure head 38 may also be made of bakelite. When the push mechanism pushes the valve via the adjustment rod 37, the pushing end of the adjustment rod 37 may also be provided with a pressure head 38.

[0046] Since the distance between the reference surface between the two forks of the actuator of the starting metering valve and the front end face of the valve is a very important parameter, it needs to be measured. In order to increase the measuring function of the device for disassembling and assembling the starting metering valve, a gauge clamp 4 is also fixed on the base plate 1, for example, the gauge clamp 4 is fixed to the base plate 1 by bolts or screws. Among them, the gauge clamp 4 is located on the side of the first card slot 21 facing away from the second card slot 22, and the gauge clamp 4 is collinear with the first card slot 21 and the second card slot 22. The gauge clamp 4 is used to clamp the micrometer. Since the gauge clamp 4 is collinear with the first card slot 21 and the second card slot 22, and the micrometer is relatively fixed after clamping, it can be measured from a fixed position, which not only simplifies the measurement operation process, but also improves the measurement accuracy.

[0047] An embodiment of the watch clip 4 is provided below. Figures 1 to 3 ,as well as Figure 7 and Figure 8 The watch clip 4 is provided with a clamping hole 41, and the clamping hole 41 is provided with an opening slit 42. The watch clip 4 is also provided with a screw hole 43 that vertically passes through the opening slit 42. The center line of the screw hole 43 is preferably perpendicular to the center line of the clamping hole 41. The screw hole 43 passes through the watch clip 4, and an adaptive adjustment bolt 44 is provided in the screw hole 43. In order to facilitate manual adjustment of the adjustment bolt 44, the adjustment bolt 44 is provided with a five-star handle, see Figures 1 to 3 The dial indicator is clamped and fixed by the dial clamp 4 and the adjusting bolt 44, so that the dial indicator can be disassembled for calibration.

[0048] The present invention also provides a method for disassembling a starting and metering valve, wherein the method comprises the following steps of disassembling the starting and metering valve using the above-mentioned device for disassembling and assembling the starting and metering valve.

[0049] S1. Operate the push mechanism to put the push rod 31 in a non-pushing state. The push rod 31 is adjusted to the non-pushing state to facilitate placement of the bushing in the first and second slots 21 and 22 of the positioning seat 2.

[0050] S2. Place the bushing in the first slot 21 and the second slot 22 of the positioning seat 2, wherein the return spring is located on the side close to the pushing mechanism, and the bushing is locked by the positioning seat 2 in the pushing direction of the push rod 31. The purpose of locking is to prevent the bushing from axial movement when the push rod 31 pushes the valve.

[0051] S3, operate the pushing mechanism to make the push rod 31 push one end of the valve. After the push rod 31 pushes the valve, the end of the bushing away from the pushing device exposes the nut. In order to facilitate loosening the nut, the pushing mechanism needs to maintain a certain pushing amount.

[0052] S4. Loosen the nut protruding from the bushing and remove the mover by twisting it. The mover consists of two prongs, shaped like a tuning fork, and can be removed by twisting it manually.

[0053] S5. Operate the pushing mechanism to put the push rod 31 in a non-pushing state, then remove the bushing from the positioning seat 2, finally remove the return spring from the outside of the bushing, and remove the valve from the inside of the bushing to complete the decomposition of the starting metering valve.

[0054] The disassembly method of the starting metering valve adopts the above-mentioned starting metering valve disassembly and assembly device. The total disassembly time is reduced from 16 minutes for manual disassembly to less than 10 minutes, and the original assembly success rate of each set of starting metering valve actuators is increased from less than 30% to 100%, and the damage rate is reduced from 12.2% to 0, which greatly reduces the manpower burden, improves production efficiency, improves product assembly quality, and helps reduce engine failures.

[0055] The present invention also provides a method for assembling a starting metering valve, wherein the starting metering valve is assembled using the above-mentioned device for disassembling and assembling the starting metering valve. The operation steps are opposite to those of the above-mentioned disassembly method, and include the following steps.

[0056] S1. Install the valve into the bushing and insert the return spring outside the bushing for standby use.

[0057] S2. Operate the pushing mechanism to put the push rod 31 in a non-pushing state so that the bushing can be placed in the positioning seat 2; then place the bushing in the first slot 21 and the second slot 22 of the positioning seat 2, wherein the return spring is located on the side close to the pushing mechanism, and the bushing is locked by the positioning seat 2 in the pushing direction of the push rod 31.

[0058] S3. Operate the pushing mechanism to make the push rod 31 push one end of the valve.

[0059] S4. Connect the mover to the end of the valve away from the push mechanism and tighten the nut.

[0060] S5. Operate the pushing mechanism to put the push rod 31 in a non-pushing state, then remove the bushing from the positioning seat 2 to complete the assembly of the starting metering valve.

Claims

1. A device for disassembling and assembling a starter metering valve, characterized in that: The invention comprises a base plate (1), a positioning seat (2) fixedly arranged on the base plate (1), and a pushing mechanism. The positioning seat (2) comprises two parallel plates. The two plates are respectively provided with a first card slot (21) and a second card slot (22). When the base plate (1) is placed horizontally, the opening directions of the first card slot (21) and the second card slot (22) are both vertically upward. The second card slot (22) is located between the pushing mechanism and the first card slot (21). The first card slot (21) is rectangular or U-shaped. The second card slot (22) is divided into a supporting slot (22-1) close to the first card slot (21) and a supporting slot (22-2). The limiting groove (22-2) is close to the pushing mechanism, the shape of the supporting groove (22-1) in the cross section is rectangular at the top and semicircular at the bottom, the limiting groove (22-2) is in the shape of a major arc in the cross section, the radius of the semicircle in the cross section of the supporting groove (22-1) is smaller than the radius of the major arc in the cross section of the limiting groove (22-2), the line connecting the centers of the semicircle in the cross section of the supporting groove (22-1) and the line connecting the centers of the major arc in the cross section of the limiting groove (22-2) are collinear, and the cross section is a cross section perpendicular to the center line of the second clamping groove (22); The pushing mechanism includes a push rod (31), a mounting seat (32) and a rocker arm (33). The mounting seat (32) is fixedly mounted on the bottom plate (1). A through hole is set on the top of the mounting seat (32). A first clamping member (34) and a second clamping member (35) are set on both sides of the through hole of the mounting seat (32). The clamping member of the mounting seat (32) close to the positioning seat (2) is the first clamping member (34). The first clamping member (34) and the second clamping member (35) are threadedly connected. The first clamping member (34) and the second clamping member (35) are both provided with through holes. The push rod (31) is passed through In the through holes of the first clamping member (34), the second clamping member (35) and the mounting seat (32), the pushing direction of the push rod (31) points to the second clamping slot (22) and passes through the first clamping slot (21) and the second clamping slot (22); the second clamping member (35) is rotatably connected to two identical pull plates (36), the two pull plates (36) are rotatably connected to the rocker arm (33), and the rocker arm (33) is also rotatably connected to one end of the push rod (31), and the rotational connection position of the rocker arm (33)-the push rod (31) does not coincide with the rotational connection position of the rocker arm (33)-the pull plate (36).

2. The device for disassembling and assembling a starter metering valve according to claim 1, wherein: The pushing end of the push rod (31) is threadedly connected to the regulating rod (37), and a fixing nut is arranged on the outside of the regulating rod (37).

3. The device for disassembling and assembling a starter metering valve according to claim 2, wherein: A pressure head (38) is also provided at the pushing end of the push rod (31) or the adjusting rod (37).

4. The device for disassembling and assembling a starter metering valve according to any one of claims 1 to 3, characterized in that: A watch clip (4) is also provided on the bottom plate (1). The watch clip (4) is located on the side of the first card slot (21) facing away from the second card slot (22), and the watch clip (4) is collinear with the first card slot (21) and the second card slot (22).

5. The device for disassembling and assembling a starter metering valve according to claim 4, wherein: The meter clamp (4) is provided with a clamping hole (41), the clamping hole (41) is provided with an opening slit (42), the meter clamp (4) is further provided with a screw hole (43) vertically penetrating the opening slit (42), the screw hole (43) penetrates the meter clamp (4), and an adaptive adjusting bolt (44) is provided in the screw hole (43).

6. A method for disassembling the starting metering valve, characterized in that: Disassembling the starter metering valve by the device for disassembling and assembling the starter metering valve according to any one of claims 1 to 5 comprises the following steps: S1, operating the pushing mechanism to put the push rod (31) in a non-pushing state; S2, placing the bushing in the first clamping groove (21) and the second clamping groove (22) of the positioning seat (2), wherein the return spring is located on the side close to the pushing mechanism, and the bushing is locked by the positioning seat (2) in the pushing direction of the ejector rod (31); S3, operating the pushing mechanism to make the push rod (31) push one end of the valve; S4. Loosen the nut exposed from the bushing, and then remove the mover by twisting it; S5. Operate the push mechanism to put the push rod (31) in a non-pushing state, then remove the bushing from the positioning seat (2), finally remove the return spring from the outside of the bushing, and remove the valve from the inside of the bushing.

7. A method for assembling a starting metering valve, characterized in that: Assembling the starting metering valve by the device for disassembling and assembling the starting metering valve according to any one of claims 1 to 5 comprises the following steps: S1. Install the valve into the bushing and insert the return spring into the bushing for standby use; S2, operating the pushing mechanism to put the push rod (31) in a non-pushing state, and then placing the bushing in the first clamping groove (21) and the second clamping groove (22) of the positioning seat (2), wherein the return spring is located on the side close to the pushing mechanism, and the bushing is locked by the positioning seat (2) in the pushing direction of the push rod (31); S3, operating the pushing mechanism to make the push rod (31) push one end of the valve; S4. Connect the mover to the end of the valve away from the push mechanism and tighten the nut; S5. Operate the push mechanism to put the push rod (31) into a non-pushing state, and then remove the bushing from the positioning seat (2).

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