Oil way structure for improving hydraulic oil water hammer effect and energy accumulator structure applied to oil way structure

Abstract

The utility model discloses an oil way structure for improving hydraulic oil water hammer effect and an energy accumulator structure applied to the oil way structure, and belongs to the technical field of hydraulic oil way structures, the oil way structure comprises a pressure reducing valve, a one-way valve, a cartridge valve, a pressure gauge, a pressure switch, an energy accumulator structure and a throttle valve; one end of the pressure reducing valve is connected with an external main oil way structure, and the other end of the pressure reducing valve is connected with the input end of the one-way valve. The output end of the one-way valve is connected with one end of the cartridge valve, the pressure gauge and the pressure switch are connected between the cartridge valve and the one-way valve, the pressure switch is in control connection with the cartridge valve, and the other end of the cartridge valve is connected with the energy accumulator structure; one end of the throttle valve is connected between the cartridge valve and the connecting end of the one-way valve, and the other end of the throttle valve is connected with an external main oil way structure. The technical problem of how to improve the water hammer effect of the oil way structure is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hydraulic oil way structure, in particular to an oil way structure for improving hydraulic oil water hammer effect and an accumulator structure applied to the oil way structure for improving hydraulic oil water hammer effect. BACKGROUND

[0002] In the hydraulic power equipment, because the oil flows freely inside the oil pipe, when the open valve is suddenly closed, the oil will produce an impact pressure on the valve and the pipe wall; the subsequent oil reaches the maximum pressure rapidly under the action of inertia and produces a destructive effect, that is, positive water hammer. On the contrary, when the closed valve is suddenly opened, water hammer will also be produced, which can be called negative water hammer; in terms of damage, the damage effect of negative water hammer is less than that of positive water hammer.

[0003] The instantaneous pressure generated by water hammer can reach several tens of times of the normal working pressure in the pipeline. Such a large amplitude pressure fluctuation can cause strong vibration or noise of the pipeline system and may damage the valve joint, which has a certain damaging effect on the pipeline system over a long period of time.

[0004] In order to reduce the damage effect of the water tank effect of the hydraulic oil way, the anti-water hammer effect hydraulic module one-way valve structure disclosed in Chinese patent CN217421686U includes a valve shell, a valve core mechanism arranged in the valve shell, and a buffer mechanism arranged on the valve shell. The buffer mechanism includes a first buffer pipe, a plurality of buffer rings, a second buffer pipe and a buffer part. The anti-water hammer effect hydraulic module one-way valve structure can slow down the flow rate of fluid entering the one-way valve, avoid excessive flow rate of fluid, and prevent the fluid from rapidly impacting the valve core, so that the valve core and the valve sleeve in the one-way valve collide, which can easily cause damage to the one-way valve. The anti-water hammer effect hydraulic module one-way valve structure can make the buffer ball move in the second buffer pipe by impacting the buffer ball, generate friction, and make the guide blocks on both sides of the buffer ball slide in the guide groove, cooperate with the second spring, and cause resistance to the flow of fluid, thereby reducing the flow rate of fluid and slowing down the impact of fluid on the one-way valve.

[0005] However, the above-mentioned disclosed hydraulic module anti-water hammer effect of the one-way valve structure still has the technical problem of being unable to improve the water hammer effect of the oil line structure. Specifically, because the switch valve causes the speed of the oil to change sharply, it can damage the pipeline, water pump, valve, and reduce the pressure of the pipe network. Water hammer effect has great destructive: overpressure will cause pipe rupture, but also damage the valve and fixed parts. In a very short time, the flow of oil from the rated flow drops to zero. Because the fluid has kinetic energy and a certain degree of compressibility; therefore, the huge change in flow in a very short time will cause the pressure to be too high and too low to the pipe. The pressure impact will make the pipe wall stressed and produce noise, like a hammer hitting the pipe, so the one-way valve structure disclosed in the prior art can only weaken the water hammer effect near the valve body, and cannot improve the water hammer effect of the entire oil line structure, which has limitations in actual application. Utility model content

[0006] Therefore, it is necessary to provide an oil line structure for improving the water hammer effect of hydraulic oil and an accumulator structure applied thereto in view of the technical problem of how to improve the water hammer effect of the oil line structure.

[0007] An oil line structure for improving the water hammer effect of hydraulic oil, comprising: a pressure reducing valve, a one-way valve, a cartridge valve, a pressure gauge, a pressure switch, an accumulator structure, and a throttle valve; one end of the pressure reducing valve is connected to an external main oil line structure, and the other end of the pressure reducing valve is connected to an input end of the one-way valve; an output end of the one-way valve is connected to one end of the cartridge valve, the pressure gauge and the pressure switch are connected between the cartridge valve and the one-way valve, the pressure switch is in control connection with the cartridge valve, and the other end of the cartridge valve is connected to the accumulator structure; one end of the throttle valve is connected between the connection end of the cartridge valve and the one-way valve, and the other end of the throttle valve is connected to the external main oil line structure.

[0008] Further, an accumulator structure applied to the above-mentioned oil line structure for improving the water hammer effect of hydraulic oil, comprising: a shell, a capsule structure, an inflation valve, a mushroom oil valve structure, a drain screw plug structure, and a sealing assembly; the capsule structure is arranged in the shell, the inflation valve is arranged at one end of the shell, and the inflation valve is connected to the capsule structure; the mushroom oil valve structure is movably arranged in the shell, and the capsule structure is movably connected to the mushroom oil valve structure; the drain screw plug structure is arranged at the other end of the shell relative to the inflation valve, the mushroom oil valve structure is movably connected to the drain screw plug structure, and the sealing assembly is connected to the drain screw plug structure.

[0009] Further, the capsule structure has a capsule body, a capsule air nozzle, and a stop nut.

[0010] Further, the capsule is arranged in the shell, the capsule air nozzle is connected with the capsule, the capsule air nozzle is arranged at one end of the shell, and the stop nuts are connected with the capsule air nozzle and the shell, respectively.

[0011] Further, the inflating valve has an inflating valve body, an air valve end cover, and an inflating valve protection cover.

[0012] Further, the inflating valve body is arranged at one end of the capsule air nozzle, the air valve end cover is arranged at one end of the inflating valve body, the inflating valve protection cover is arranged outside the inflating valve body and the air valve end cover, and the inflating valve protection cover is connected with one end of the capsule air nozzle.

[0013] Further, the bacteria-shaped oil valve structure has an umbrella-shaped part, a rod body, and a reset spring.

[0014] Further, the umbrella-shaped part is movably arranged in the shell, the umbrella-shaped part is connected with the rod body, the rod body is connected with the oil drain screw plug structure, the reset spring is sleeved on the rod body, and the reset spring is connected with the oil drain screw plug structure and the umbrella-shaped part, respectively.

[0015] Further, the oil drain screw plug structure has a screw plug main body, an in-out structure, a rubber holder, and a positioning nut.

[0016] Further, the screw plug main body is arranged at the other end of the shell relative to the inflating valve, the in-out structure is arranged in the screw plug main body, the rod body is movably arranged in the in-out structure, and one end of the reset spring is connected with the in-out structure; the rubber holder is arranged at one end of the inner cavity of the shell, the rubber holder is connected with the screw plug main body, the positioning nut is connected with the screw plug main body and the shell, respectively, and the sealing assembly is arranged between the positioning nut and the rubber holder.

[0017] In summary, the utility model discloses an oil path structure for improving hydraulic oil water hammer effect and accumulator structure applied to it are equipped with pressure reducing valve, check valve, cartridge valve, pressure gauge, pressure switch, accumulator structure and throttle valve respectively, one end of pressure reducing valve is connected with external main oil path structure, the other end of pressure reducing valve is connected with the input end of check valve, the output end of check valve is connected with one end of cartridge valve, the pressure gauge and pressure switch are connected between cartridge valve and check valve, pressure switch is connected with cartridge valve control, the other end of cartridge valve is connected with accumulator structure, one end of throttle valve is connected between the connecting end of cartridge valve and check valve, the other end of throttle valve is connected with external main oil path structure, thereby, the utility model discloses an oil path structure for improving hydraulic oil water hammer effect adds accumulator in oil path, and releases the energy of water hammer to accumulator, simultaneously, inserts check valve and other components of suitable specification in main oil path, and when the valve closes, the pressure of water hammer impact in pipeline can be returned to accumulator through check valve, and the energy of accumulator is gradually unloaded from throttle valve, thereby, can reduce the damaging influence of water hammer effect to pipeline structure, can greatly reduce the noise generated by switch valve, and the energy lost in oil path structure can also be recycled, so, the utility model discloses an oil path structure for improving hydraulic oil water hammer effect and accumulator structure applied to it solve the technical problem of how to improve the water hammer effect of oil path structure. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the structural schematic diagram of the utility model discloses an oil path structure for improving hydraulic oil water hammer effect;

[0019] Figure 2 It is the structural schematic diagram of the accumulator structure of the utility model discloses an oil path structure for improving hydraulic oil water hammer effect;

[0020] Figure 3 It is another direction cross section structural schematic diagram of the accumulator structure of the utility model discloses an oil path structure for improving hydraulic oil water hammer effect;

[0021] Figure 4 It is the cross section structural schematic diagram of part structure of the accumulator structure of the utility model discloses an oil path structure for improving hydraulic oil water hammer effect;

[0022] Figure 5 It is the cross section structural schematic diagram of part structure of the accumulator structure of the utility model discloses an oil path structure for improving hydraulic oil water hammer effect. DETAILED DESCRIPTION

[0023] In order to make the above object, characteristics and advantages of the present application more apparent, concrete embodiments of the present application will be described in detail with reference to the drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different manners without departing from the spirit of the present application. Those skilled in the art will appreciate the scope of the present application and can make similar modifications without departing from the spirit of the present application. Therefore, the present application is not limited by the embodiments disclosed below.

[0024] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0025] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0026] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0028] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only embodiment.

[0029] Please refer to Figure 1 The utility model relates to an oil circuit structure for improving hydraulic oil water hammer effect, including pressure reducing valve V1, check valve V2, cartridge valve V3, pressure gauge B1, pressure switch F10, energy accumulator structure F6 and throttle valve V4, one end of pressure reducing valve V1 is connected with external main oil circuit structure, the other end of pressure reducing valve V1 is connected with the input end of check valve V2, the output end of check valve V2 is connected with one end of cartridge valve V3, cartridge valve V3 is connected with pressure gauge B1 and pressure switch F10 between check valve V2, pressure switch F10 is connected with cartridge valve V3 control, the other end of cartridge valve V3 is connected with energy accumulator structure F6, one end of throttle valve V4 is connected between the connecting end of cartridge valve V3 and check valve V2, the other end of throttle valve V4 is connected with external main oil circuit structure.

[0030] Specifically, when the oil path structure for improving water hammer effect of hydraulic oil is in the working process, if the hydraulic valve at the external main oil path structure is closed, the impact energy generated by the oil at the main oil path P enters the pressure reducing valve V1 through the oil path, and the pressure reducing valve V1 plays a role of safety pressure relief; thereafter, the oil backflow is prevented by the check valve V2. At this time, after the oil passes through the pressure reducing valve V1 and the check valve V2, the oil flows to the cartridge valve V3; the pressure gauge B1 between the output end of the check valve V2 and the connection end of the cartridge valve V3 can be used to observe the oil path pressure value at this time; and after passing through the cartridge valve V3, the oil flows into the accumulator structure F6; after the impact energy is absorbed by the accumulator structure F6, the oil is fed back to the oil path; in this process, as the internal pressure of the accumulator structure F6 increases, the check valve at the cartridge valve V3 cannot be opened, and after the pressure switch F10 detects that the oil path pressure rises to the preset threshold value, the valve at the cartridge valve V3 is controlled to be opened, so that the oil reflows through the throttle valve V4 into the external main oil path structure.

[0031] Therefore, the oil path structure for improving water hammer effect of hydraulic oil releases the energy brought by water hammer to the accumulator by adding the accumulator in the oil path; meanwhile, the appropriate specification of the check valve and other components are connected in the main oil path, and when the valve on the front side is closed, the pressure brought by the water hammer impact in the pipeline is returned to the accumulator through the check valve, and the energy of the accumulator is gradually unloaded from the throttle valve; thereby, the damage of the water hammer effect to the pipeline structure can be reduced. Thus, the noise generated by the on-off valve can be greatly reduced, and the energy lost in the oil path structure can be recycled.

[0032] Further, please continue to refer to Figures 2 to 5 ; an accumulator structure applied to the foregoing oil path structure for improving water hammer effect of hydraulic oil, which comprises a shell 1, a capsule structure 2, a charging valve 3, a mushroom oil valve structure 4, a drain screw plug structure 5 and a sealing assembly 6; the capsule structure 2 is arranged in the shell 1, the charging valve 3 is arranged at one end of the shell 1, and the charging valve 3 is connected with the capsule structure 2; the mushroom oil valve structure 4 is movably arranged in the shell 1, and the capsule structure 2 is movably connected with the mushroom oil valve structure 4; the drain screw plug structure 5 is arranged at the other end of the shell 1 relative to the charging valve 3, the mushroom oil valve structure 4 is movably connected with the drain screw plug structure 5, and the sealing assembly 6 is connected with the drain screw plug structure 5.

[0033] Specifically, when the accumulator structure is in the working process, the oil pressure in the pipeline of the external hydraulic oil circuit rises, the oil enters the mushroom-shaped oil valve structure 4 through the oil drain plug structure 5 and pushes the mushroom-shaped oil valve structure 4 to move to the inside of the shell 1, and then the oil enters the shell 1. At this time, the oil in the shell 1 extrudes the capsule structure 2 to be compressed and deformed. The nitrogen gas in the capsule structure 2 is compressed, and the volume is reduced, and the gas pressure is increased; thus, the energy of the oil circuit pipeline can be stored in the gas inside.

[0034] After that, when the oil pressure of the external hydraulic oil circuit pipeline drops, the nitrogen gas in the capsule structure 2 in the shell 1 is expanded, at this time, the capsule structure 2 can extrude the oil in the shell 1 to return to the oil pipe outside from the oil drain plug structure 5, and also push the mushroom-shaped oil valve structure 4 to reset; after that, the energy of the external hydraulic pipeline can be supplemented and recovered.

[0035] Specifically, the operator can prefill nitrogen gas from the inflation valve 3 into the inside of the capsule structure 2. The end of the mushroom-shaped oil valve structure 4 arranged in the shell 1 is umbrella-shaped, and the rod part connected to the oil drain plug structure 5 is long rod-shaped structure, which is similar to the shape of a mushroom.

[0036] Further, the capsule structure 2 has a capsule body 201, a capsule air nozzle 202, and a stop nut 203; the capsule body 201 is arranged in the shell 1, the capsule air nozzle 202 is connected with the capsule body 201, the capsule air nozzle 202 is arranged at one end of the shell 1, and the stop nut 203 is connected with the capsule air nozzle 202 and the shell 1 respectively. Specifically, the stop nut 203 can fix the capsule air nozzle 202 to one end side of the shell 1, so that the capsule body 201 is relatively fixed in the shell 1, so that the capsule body 201 can be inflated or compressed in the shell 1 as needed.

[0037] Further, the inflating valve 3 has an inflating valve body 301, a valve end cover 302 and an inflating valve protection cover 303; the inflating valve body 301 is arranged at the end of the capsule air nozzle 202, the valve end cover 302 is arranged at the end of the inflating valve body 301; the inflating valve protection cover 303 is arranged outside the inflating valve body 301 and the valve end cover 302, and is connected with the end of the capsule air nozzle 202. Specifically, the inflating valve 3 provided by the utility model sets a double leakage protection structure, the first one is the valve end cover 302 for preventing leakage at the end of the inflating valve body 301, and the second one is the inflating valve protection cover 303 for preventing leakage at the end of the capsule air nozzle 202. Thus, the nitrogen in the capsule structure 2 can be better prevented from leaking.

[0038] Further, the bacteria-shaped oil valve structure 4 has an umbrella-shaped part 401, a rod body 402 and a reset spring 403; the umbrella-shaped part 401 is movably arranged in the inside of the shell 1, the umbrella-shaped part 401 is connected with the rod body 402, the rod body 402 is connected with the oil discharge screw plug structure 5, the reset spring 403 is sleeved in the rod body 402, and the reset spring 403 is connected with the oil discharge screw plug structure 5 and the umbrella-shaped part 401 respectively. Specifically, when the oil pressure of the external hydraulic system rises and the oil flows from the oil discharge screw plug structure 5, the oil can push the umbrella-shaped part 401 to make it enter the inner cavity of the shell 1; thereafter, when the oil discharge is completed, the reset spring 403 can pull the umbrella-shaped part 401 back to the original position.

[0039] Further, the oil discharge screw plug structure 5 has a screw plug body 501, an in-out structure 502, a rubber support 503 and a positioning nut 504; the screw plug body 501 is arranged at the other end of the shell 1 relative to the inflating valve 3, the in-out structure 502 is arranged in the screw plug body 501, the rod body 402 is movably arranged in the in-out structure 502, and one end of the reset spring 403 is connected with the in-out structure 502; the rubber support 503 is arranged at one end of the inner cavity of the shell 1, the rubber support 503 is connected with the screw plug body 501, the positioning nut 504 is connected with the screw plug body 501 and the shell 1 respectively, and the sealing assembly 6 is arranged between the positioning nut 504 and the rubber support 503. Specifically, a plurality of through holes are arranged in the middle of the in-out structure 502 to facilitate the passage of oil; the sealing assembly 6 can be a rubber sealing ring and the like, which is used for plugging the connection between the screw plug body 501 and the shell 1, so that the inside of the shell 1 is sealed.

[0040] In summary, the utility model discloses an oil line structure for improving hydraulic oil water hammer effect is equipped with pressure reducing valve V1, check valve V2, cartridge valve V3, pressure gauge B1, pressure switch F10, energy accumulator structure F6 and throttle valve V4 respectively, one end of pressure reducing valve V1 is connected with external main oil line structure, the other end of pressure reducing valve V1 is connected with the input end of check valve V2, the output end of check valve V2 is connected with one end of cartridge valve V3, pressure gauge B1 and pressure switch F10 are connected between cartridge valve V3 and check valve V2, pressure switch F10 is connected with cartridge valve V3 control, the other end of cartridge valve V3 is connected with energy accumulator structure F6, one end of throttle valve V4 is connected between the connecting end of cartridge valve V3 and check valve V2, the other end of throttle valve V4 is connected with external main oil line structure, thereby, the utility model discloses an oil line structure for improving hydraulic oil water hammer effect releases the energy brought by water hammer to energy accumulator by adding energy accumulator in oil line, simultaneously, access the check valve of suitable specification and other components in main oil line, and the pressure brought by water hammer impact in pipeline will be returned to energy accumulator through check valve when the valve on the front is closed, and the energy of energy accumulator is gradually unloaded from throttle valve, and then, the damaging influence of water hammer effect on pipeline structure can be reduced, and thus, the noise produced by on-off valve can be greatly reduced, and the energy lost in oil line structure can also be recycled, so that the utility model discloses an oil line structure for improving hydraulic oil water hammer effect solves the technical problem of how to improve the water hammer effect of oil line structure.

[0041] The technical features of the above-described embodiments can be combined in any manner, and to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered that they are within the scope of the present disclosure.

[0042] The above-described embodiments only express several implementation manners of the utility model, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the utility model patent. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. An oil passage structure for improving a water hammer effect of hydraulic oil, characterized by comprising: It includes: The pressure reducing valve, check valve, cartridge valve, pressure gauge, pressure switch, accumulator structure and throttle valve; one end of the pressure reducing valve is connected with the external main oil line structure, the other end of the pressure reducing valve is connected with the input end of the check valve; the output end of the check valve is connected with one end of the cartridge valve, the pressure gauge and the pressure switch are connected between the cartridge valve and the check valve, the pressure switch is connected with the cartridge valve, the other end of the cartridge valve is connected with the accumulator structure; one end of the throttle valve is connected between the connection end of the cartridge valve and the check valve, the other end of the throttle valve is connected with the external main oil line structure.

2. An accumulator structure applied to the oil passage structure for improving a hydraulic oil water hammer effect according to claim 1, characterized by It includes: The shell, capsule structure, inflation valve, bacteria-shaped oil valve structure, oil drain plug structure and sealing assembly; The capsule structure is arranged in the shell, the inflation valve is arranged at one end of the shell, the inflation valve is connected with the capsule structure; the bacteria-shaped oil valve structure is movably arranged in the shell, the capsule structure is movably connected with the bacteria-shaped oil valve structure; the oil drain plug structure is arranged at the other end of the shell relative to the inflation valve, the bacteria-shaped oil valve structure is movably connected with the oil drain plug structure, and the sealing assembly is connected with the oil drain plug structure.

3. The accumulator structure of claim 2, wherein: The capsule structure has a capsule body, a capsule air nozzle and a stop nut.

4. The accumulator structure of claim 3, wherein: The capsule body is arranged in the shell, the capsule air nozzle is connected with the capsule body, and the capsule air nozzle is arranged at one end of the shell; the stop nut is connected with the capsule air nozzle and the shell, respectively.

5. The accumulator structure of claim 4, wherein: The inflation valve has an inflation valve body, a valve end cover and an inflation valve protection cover.

6. The accumulator structure of claim 5, wherein: The inflation valve body is arranged at the end of the capsule air nozzle, and the valve end cover is arranged at the end of the inflation valve body; the inflation valve protection cover is arranged outside the inflation valve body and the valve end cover, and the inflation valve protection cover is connected with the end of the capsule air nozzle.

7. The accumulator structure of claim 6, wherein: The bacteria-shaped oil valve structure has an umbrella-shaped part, a rod body and a reset spring.

8. The accumulator structure of claim 7, wherein: The umbrella-shaped part is movably arranged in the shell, the umbrella-shaped part is connected with the rod body, the rod body is connected with the oil drain plug structure, the reset spring is sleeved on the rod body, and the reset spring is connected with the oil drain plug structure and the umbrella-shaped part, respectively.

9. The accumulator structure of claim 8, wherein: The oil drain plug structure has a plug main body, an inlet and outlet structure, a rubber holder and a positioning nut.

10. The accumulator structure of claim 9, wherein: The plug main body is arranged at the other end of the shell relative to the inflation valve, the inlet and outlet structure is arranged in the plug main body, the rod body is movably arranged in the inlet and outlet structure, and one end of the reset spring is connected with the inlet and outlet structure; the rubber holder is arranged at one end of the inner cavity of the shell, the rubber holder is connected with the plug main body, the positioning nut is connected with the plug main body and the shell, respectively, and the sealing assembly is arranged between the positioning nut and the rubber holder.

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