Miniature adjustable air bag type energy accumulator easy to disassemble

Abstract

The miniature adjustable air bag type energy accumulator easy to disassemble comprises an air bag arranged in a process outer cylinder, one end of the air bag is in threaded connection with a first thread locking mechanism, and the other end of the air bag is in threaded connection with a second thread locking mechanism. The second thread locking mechanism is connected with the process outer cylinder so that the first thread locking mechanism can abut against the bottom of the process outer cylinder. And the thread locking mechanism I and the thread locking mechanism II are respectively matched with the process outer cylinder in a sealing manner. The two ends of the air bag are locked through the first thread locking mechanism and the second thread locking mechanism correspondingly and are in sealing fit with the process outer cylinder, the sealing performance of the energy accumulator is guaranteed, and disassembly and assembly are convenient; the threaded locking mechanism at one end of the air bag is connected with the process outer barrel, and the threaded locking mechanism at the other end of the air bag abuts against the inner bottom of the process outer barrel, so that the energy accumulator is of a plug-in type embedded structure, and the energy accumulator can be directly pulled out to be replaced or maintained only by detaching the second threaded locking mechanism from the process outer barrel during detachment; the defects that a traditional energy accumulator is externally connected and occupies a large space are overcome, and updating is time-saving and labor-saving.

Description

Technical Field

[0001] The invention relates to the technical field of fluid control, and in particular to an air bag type accumulator. Background Art

[0002] In the hydraulic system, the accumulator can achieve the purpose of circuit pressure stabilization by replenishing the pressure in the fluid circuit. The main principle is the compressibility of nitrogen. When the liquid in the fluid circuit is affected by the increase and decrease of temperature, the liquid volume will expand and contract. Due to the elasticity of the airbag and the compressibility of the gas, it can absorb and replenish the increase and loss of the liquid side volume, which is used to ensure the stability of the liquid side pressure and maintain the normal working pressure of the hydraulic system. However, as the system is used for a longer time, the system will have more or less gas side or liquid side leakage, resulting in a gradual decrease in the gas side storage energy value. At the same time, the application environment of fluid control fields such as aerospace is relatively complex and the temperature range is wide. The application environment of conventional accumulators is mostly -10℃~+65℃, which cannot meet the requirements of its use environment. As a system pressure stabilization device, the failure of the accumulator is a latent damage. Replacing a new accumulator is time-consuming, labor-intensive and expensive.

[0003] The Chinese invention application with a publication date of 2015.03.11 and publication number of CN 104405694 A discloses an airbag accumulator, comprising an outer tube and an inner tube, wherein the inner tube is arranged inside the outer tube, a plurality of oil holes are arranged on the surface of the inner tube, an upper end cap and a lower end cap having an oil inlet and an oil outlet are arranged at both ends of the outer tube, respectively, the oil inlet and the oil outlet are connected to the inner tube, an elastic tube is arranged between the outer wall of the inner tube and the inner wall of the outer tube, the two ends of the elastic tube are connected to the upper end cap and the lower end cap, respectively, an air cavity for accommodating gas is formed between the elastic tube and the outer tube, an inflation valve and an air pressure regulating device are arranged on the surface of the outer tube, the air pressure regulating device is connected to the outer tube through a vent pipe, and a regulating valve for separating the air pressure regulating device and the outer tube is arranged on the vent pipe. However, the airbag accumulator in the application is not tightly connected, and the wall thickness of the rubber tube is relatively thick, and the sensitivity is not high. It is mostly suitable for realizing high-pressure compensation, and there is a problem of high leakage when used in a low-pressure environment.

[0004] The Chinese invention patent with the publication date of 2017.02.01 and the publication number of CN 106368991 A discloses an airbag accumulator, including a shell, an inner cavity, an airbag, a buffer frame, a liquid flow control device, a liquid flow circulation device and a spring group. The interior of the shell is an inner cavity, and an airbag is placed in the inner cavity. The airbag is connected to the connection end through an air inlet pipe. The lower end of the inner cavity is provided with a buffer frame, a liquid flow control device and a liquid flow circulation device. The buffer frame and the liquid flow circulation device are connected as a whole, and the lower ends of the buffer frame and the liquid flow circulation device are vertically provided with a spring group corresponding thereto. The bottom end of the shell is connected to the liquid flow pipe through a connecting shell. The airbag accumulator is combined with the common airbag accumulator currently used to make structural changes, branch processing is performed on the air inlet pipe structure of the external gas, and the structure of the spring group is used to design the buffer structure at the bottom, and a liquid flow control device is also provided, so that the pressure of the inner cavity is reasonably controlled and the practicality is improved. However, the accumulator structure of this patent is complex, the airbag is difficult to replace, and the product is an external design, which occupies a large space. The spring needs to be compressed and restored repeatedly, and there is a risk of force attenuation in high temperature environments. It is not suitable for long-term storage and use. Summary of the invention

[0005] In view of the above technical problems, the present invention proposes an easily detachable micro-adjustable airbag accumulator, which is used to solve the problem that the airbag accumulator in the prior art is prone to leakage and failure after long-term use and is inconvenient to repair and replace.

[0006] In order to achieve the above object, the technical solution of the present invention is achieved as follows: An easily detachable micro-adjustable airbag accumulator comprises an airbag for being arranged in a process outer cylinder, wherein one end of the airbag is threadedly connected with a thread locking mechanism 1, and the other end is threadedly connected with a thread locking mechanism 2, and the thread locking mechanism 2 is connected to the process outer cylinder to press the thread locking mechanism 1 against the bottom of the process outer cylinder; the thread locking mechanism 1 and the thread locking mechanism 2 are respectively sealed with the process outer cylinder.

[0007] When the present invention is actually used, the process outer cylinder is a simulated valve group, and the accumulator is assembled into the inner hole structure of the hydraulic system that is the same as that of the process outer cylinder. The two ends of the airbag are locked respectively by the threaded locking mechanism one and the threaded locking mechanism two, which not only ensures the sealing performance of the airbag, prevents leakage, and avoids failure of the airbag, but also facilitates disassembly and assembly in the threaded locking manner, greatly reducing the maintenance cost; the present invention connects the threaded locking mechanism at one end of the airbag to the process outer cylinder and presses the threaded locking mechanism at the other end against the inner bottom of the process outer cylinder, so that the accumulator is a plug-in embedded structure, which is not only small in size but also light in weight; and when disassembling, it is only necessary to disassemble the threaded locking mechanism two from the process outer cylinder, and the entire accumulator can be directly pulled out for replacement or maintenance, which not only avoids the disadvantages of the external design and large space occupied by the traditional accumulator, but also avoids the problem of time-consuming and labor-intensive updating of the traditional accumulator.

[0008] Further, the airbag includes an airbag body, a left end connecting tube and a right end connecting tube connected at both ends of the airbag body, the left end connecting tube is provided with a left annular boss protruding radially outward at one end away from the airbag body, and the right end connecting tube is provided with a right annular boss protruding radially outward at one end away from the airbag body.

[0009] The beneficial effects of the above technical solution are: by setting the left end connecting tube and the right end connecting tube, it is convenient to connect and fix the airbag to prevent the airbag from moving up and down; by setting an annular boss on the left end connecting tube and the right end connecting tube, it is convenient to clamp the left end connecting tube and the right end connecting tube to prevent lateral movement of the airbag.

[0010] Furthermore, the second threaded locking mechanism includes a locking nut sleeved on the outside of the left end connecting tube and a shell threadedly connected to the locking nut; the shell includes a middle diameter section, the end face of the middle diameter section is tightly fitted with the end face of the left end connecting tube; the outer periphery of the middle diameter section is provided with an external thread, and the locking nut is provided with an internal thread matching the external thread so that the locking nut is threadedly connected to the middle diameter section of the shell.

[0011] The beneficial effect of the above technical solution is: by setting a threadedly connected shell and a locking nut, after the locking nut is sleeved on the outside of the left end connecting tube and threadedly connected to the shell, under the action of the left annular boss, the locking nut drives the end face of the left end connecting tube to press against the end face of the middle diameter section of the shell, thereby fixing one end of the airbag through the second threaded locking mechanism.

[0012] Furthermore, the locking nut includes an internal threaded hole section provided with the internal thread and a closing section arranged at one end of the internal threaded hole section, the inner side of the closing section is in contact with the left end connecting tube and the left annular boss; the outer periphery of the locking nut is sealed with the inner wall of the process outer tube.

[0013] The beneficial effects of the above technical solution are as follows: the present invention makes the left end of the airbag more tightly fixed by fitting the closing section of the locking nut with the left end connecting tube and the left annular boss, thereby preventing leakage of the left end of the liquid side of the airbag; and prevents leakage of the gas side between the airbag and the process outer tube by sealing the outer periphery of the locking nut with the inner wall of the process outer tube.

[0014] Furthermore, the shell also includes a left small diameter section coaxially connected to the middle diameter section and a right small diameter section coaxially arranged with the left small diameter section, the outer periphery of the left small diameter section is in contact with the inner wall of the left end connecting tube, and the outer periphery of the right small diameter section is in contact with the inner wall of the right end connecting tube; and the left small diameter section and the right small diameter section are connected by a connecting section; the connecting section is penetrated in the airbag.

[0015] The beneficial effect of the above technical solution is: the present invention arranges a left small diameter section and a right small diameter section on the shell, which respectively fits with the inner wall of the left end connecting tube and the inner wall of the right end connecting tube, so that the sealing effect on the two ends of the airbag is better, and the left small diameter section and the right small diameter section are connected by a connecting section, so that the two ends of the entire airbag are strung together through the shell, which is convenient for disassembly. The threaded locking mechanism and the airbag can be pulled out together for replacement, which saves time and effort and is convenient and quick.

[0016] Furthermore, the shell is provided with a fluid channel, and the fluid channel passes through the middle diameter section, the left small diameter section, the connecting section and the right small diameter section in sequence, and the connecting section is provided with a plurality of perforations to allow the fluid in the fluid channel to enter the airbag.

[0017] The beneficial effect of the above technical solution is: by setting a fluid channel in the shell, the fluid crosses the airbag, and a plurality of perforations are provided on the connecting section to allow the fluid in the fluid channel to enter the airbag, thereby ensuring that the accumulator plays a role in the hydraulic system.

[0018] Furthermore, the shell also includes a large diameter section coaxially connected to the middle diameter section, the large diameter section includes a first step section located inside the process outer cylinder and a second step section located outside the process outer cylinder, the outer periphery of the first step section is sealed with the inner wall of the process outer cylinder, one end of the first step section is coaxially connected to the middle diameter section, and the other end is coaxially connected to the second step section, the diameter of the second step section is larger than the first step section, and the end face of the second step section close to the first step section is pressed and fitted with the outer end face of the process outer cylinder; and the second step section and the outer end face of the process outer cylinder are provided with matching bolt holes.

[0019] The beneficial effects of the above technical solution are as follows: by arranging a first step section on the shell and making the outer periphery of the first step section seal with the inner wall of the process outer tube, the sealing effect of the gas side of the accumulator is increased to prevent leakage on the gas side; by arranging a second step section on the shell and pressing it with the outer end surface of the process outer tube, not only the threaded locking mechanism at the right end of the airbag is pressed and fixed, but also the entire accumulator is pressed and fixed in the process outer tube; by arranging matching bolt holes on the second step section and the outer end surface of the process outer tube, the shell and the process outer tube are connected by bolts, so that the fixation of the accumulator is more stable.

[0020] Furthermore, the threaded locking mechanism includes a locking nut sleeved on the outside of the right-end connecting tube and a pressure cap threadedly connected to the locking nut; one end of the pressure cap is pressed against the bottom of the process outer tube, and the other end is pressed against the end face of the right-end connecting tube; the outer periphery of the pressure cap is provided with an external thread, and the locking nut is provided with an internal thread matching the external thread; the inner side of the closing section of the locking nut is fitted with the right-end connecting tube and the right annular boss; the side of the closing section of the locking nut presses the pressure cap.

[0021] The beneficial effect of the above technical solution is: by setting a threaded pressure cap and a locking nut, after the locking nut is sleeved on the outside of the right end connecting tube and threadedly connected to the pressure cap, under the action of the right annular boss, the locking nut drives the end face of the right end connecting tube to be pressed against the end face of the pressure cap, thereby fixing the right end of the airbag through a threaded locking mechanism.

[0022] Furthermore, the housing also includes a tail section coaxially connected to the right small-diameter section, and the gland is sleeved on the tail section and sealed with the tail section.

[0023] The beneficial effect of the above technical solution is that the gland is sleeved on the tail section of the shell, which facilitates the assembly and positioning of the gland, and makes the locking of the threaded locking mechanism and the airbag more stable and tight.

[0024] Furthermore, a fluid outlet is provided at the bottom of the process outer cylinder, the tail section extends into the fluid outlet, and the fluid channel passes through the tail section and leads to the fluid outlet.

[0025] The beneficial effect of the above technical solution is: by setting the tail section, and the tail section extending into the fluid outlet, the fluid channel passes through the tail section and directly reaches the fluid outlet, so that the fluid channel runs through the entire accumulator, thereby facilitating the accumulator to play the role of supplementing the pressure in the fluid circuit in the hydraulic system to achieve the purpose of circuit pressure stabilization.

[0026] Furthermore, an axial sealing ring is provided between the gland and the bottom of the process outer cylinder.

[0027] Furthermore, a radial sealing ring is provided between the outer periphery of the first step section and the inner wall of the process outer cylinder, and a radial sealing ring is provided between the locking nut and the inner wall of the process outer cylinder; a retaining ring is provided on the tail section to seal with the pressure cover.

[0028] The beneficial effects of the above technical solution are: an axial sealing ring is provided between the pressure cover and the bottom of the process outer tube, and radial sealing rings are provided at the matching position between the shell and the inner wall of the process outer tube and at the matching position between the locking nut and the inner wall of the process outer tube to ensure the sealing effect of the gas side; the sealing performance of the right end of the airbag is ensured by the retaining ring between the tail section and the pressure cover.

[0029] Furthermore, an air side space is formed between the outer side of the airbag body and the process outer tube, and a plurality of pressure equalizing grooves are arranged at corresponding positions of the process outer tube; and a filling port leading to the air side space is arranged on the process outer tube.

[0030] Furthermore, a filling valve is provided on the filling port.

[0031] The beneficial effect of the above technical solution is that the filling of gas on the gas side can be easily controlled through the filling port by setting the filling valve, thereby ensuring the stability of the liquid side pressure through gas side regulation.

[0032] Furthermore, a plurality of circumferential pressure equalizing grooves are arranged at intervals on the inner wall of the process outer cylinder.

[0033] The beneficial effect of the above technical solution is that by providing the pressure equalizing groove, when the air side is inflated, the phenomenon of uneven compression and expansion of the airbag caused by the single action of the gas can be effectively avoided.

[0034] Beneficial effects of the present invention: 1. The structure of the airbag accumulator of the present invention is a plug-in embedded design with small size and light weight. When in use, the accumulator can be directly installed into the corresponding hole of the hydraulic system to realize the voltage stabilization and compensation function of the entire system. When disassembling, the accumulator can be directly pulled out for replacement or maintenance, which makes up for the shortcomings of the traditional accumulator with external design and large space occupation; it also avoids the problem of time-consuming and labor-intensive updating of traditional accumulators; 2. The airbag accumulator of the present invention is threadedly connected between the gland and the locking nut to lock one end of the airbag, thereby ensuring the sealing performance inside one side of the accumulator; the other end of the airbag is threadedly connected between the housing and another locking nut to lock the other end of the airbag, thereby ensuring the sealing performance inside the other side of the accumulator; at the same time, the housing is fixedly connected to the process outer cylinder that is covered on the outside of the airbag and the locking nut, so that the airbag is fixed more tightly and more stably, avoiding leakage, thereby avoiding failure of the airbag; 3. The airbag accumulator of the present invention can quickly realize gas-side inflation by arranging a filling valve on one side of the process outer tube, which is convenient for adjusting the gas-side inflation value; 4. The accumulator structure of the present invention is externally connected to a filling valve. When the system charging value needs to be adjusted, the filling valve can be used to quickly adjust the liquid side pressure, thereby avoiding the waste of manpower and material resources caused by repeated disassembly of the accumulator; 5. The present invention tightly fixes the airbag by threaded connection, which is not only simple in structure but also easy to disassemble, thus greatly reducing the maintenance cost; 6. The inner hole of the outer cylinder of the process of the present invention is provided with a pressure equalizing groove, which can effectively avoid the uneven compression and expansion of the airbag caused by the single action of the gas when the gas side is inflated; 7. The airbag of the present invention is made of chlorobutyl material, which makes the airbag have good expansion and contraction performance. The use environment temperature can reach +80°C, which can meet the use environment of most aerospace and other fluid control fields, and avoids the surface cracking during the frequent contraction and expansion of the airbag; 8. When the airbag accumulator of the present invention needs to be repaired or replaced, the accumulator can be directly pulled out of the system, and is easy to disassemble and install. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 It is a structural schematic diagram of the present invention.

[0037] Reference numerals in the figures: 1. Shell, 2. Airbag, 21. Left end connecting tube, 22. Right end connecting tube, 3. Locking nut, 4. Pressure cover, 5. Radial sealing ring, 6. Axial sealing ring, 7. Process outer tube, 71. Pressure equalizing groove, 8. Retaining ring, 9. Filling valve, 10. Fluid outlet. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] An easily detachable micro-adjustable airbag accumulator described in Example 1 of the present invention includes an airbag 2 for being arranged in a process outer tube 7. The process outer tube 7 is a simulated valve group; when the accumulator is actually used, the accumulator is assembled into an inner hole structure in a hydraulic system that is the same as the process outer tube 7. An air side space is formed between the outer side of the airbag 2 and the process outer tube 7. The inner side of the airbag 2 is a liquid side. A filling port leading to the air side space is provided on the process outer tube 7, and a filling valve 9 is provided on the filling port. In this embodiment, the airbag is an arched structure with a spherical middle section and sealed ends at both ends. As Figure 1 As shown, one end of the airbag 2, i.e., the right end, is threadedly connected with a thread locking mechanism 1, and the other end of the airbag 2, i.e., the left end, is threadedly connected with a thread locking mechanism 2, and the thread locking mechanism 2 is connected with the process outer tube 7 to press the thread locking mechanism 1 against the bottom of the process outer tube 7. The present invention locks the sealing ends of the two ends of the airbag respectively through the thread locking mechanism 1 and the thread locking mechanism 2, thereby ensuring the sealing performance of the liquid side inside the airbag and preventing leakage. Among them, a sealing groove 1 is provided in the thread locking mechanism 2, and a sealing groove 2 is provided in the thread locking mechanism 1; the sealing ends of the airbag are respectively assembled in the above-mentioned sealing groove 1 and the sealing groove 2, thereby ensuring that the fluid and the gas will not mix or contact with each other. The thread locking mechanism 1 and the thread locking mechanism 2 are respectively sealed with the process outer tube to ensure the sealing performance of the gas side between the outside and the inside of the airbag, thereby avoiding the failure of the airbag; and the thread locking mechanism 1 and the thread locking mechanism 2 are respectively threadedly connected with the airbag, thereby facilitating the disassembly and assembly of the airbag, thereby greatly reducing the maintenance cost. In addition, the present invention connects the threaded locking mechanism 2 with the process outer tube 7 to press the threaded locking mechanism 1 against the bottom of the process outer tube 7 to fix the airbag structure, so that the accumulator is a plug-in embedded structure. When disassembling, it is only necessary to disassemble the threaded locking mechanism 2 from the process outer tube 7, and the entire accumulator can be directly pulled out for replacement or maintenance.

[0040] Furthermore, the airbag 2 includes an airbag body, a left end connecting tube 21 and a right end connecting tube 22 connected to both ends of the airbag body, and the left end connecting tube 21 and the right end connecting tube 22 are symmetrically arranged at both ends of the airbag body. Figure 1As shown, the left end connecting tube 21 and the right end connecting tube 22 are coaxially arranged with the airbag body. The left end connecting tube 21 is provided with a left annular boss protruding radially outward at one end away from the airbag body, that is, the left end connecting tube includes a left connecting tube body and a left annular boss located at the left end of the left connecting tube body, the outer diameter of the left annular boss is greater than the outer diameter of the left connecting tube body, and the left connecting tube body and the left annular boss are an integrated structure, so that the left end connecting tube 21 is the sealing end of the left end of the airbag. The right end connecting tube 22 is provided with a right annular boss protruding radially outward at one end away from the airbag body, that is, the right end connecting tube includes a right connecting tube body and a right annular boss located at the left end of the right connecting tube body, the outer diameter of the right annular boss is greater than the outer diameter of the right connecting tube body, and the right connecting tube body and the right annular boss are an integrated structure, so that the right end connecting tube 22 is the sealing end of the right end of the airbag. The left annular boss and the right annular boss are symmetrically arranged at the end away from the left end connecting tube 21 and the right end connecting tube 22.

[0041] Embodiment 2, which differs from Embodiment 1 in that the second threaded locking mechanism includes a locking nut 3 sleeved on the outside of the left end connecting tube 21 and a shell 1 threadedly connected to the locking nut 3, and the shell 1 includes a middle diameter section, and the middle diameter section and the locking nut 3 are both coaxially arranged with the left end connecting tube 21. The middle diameter section is located at the end of the left end connecting tube 21 away from the airbag body, and the middle diameter section is close to the left annular boss of the left end connecting tube 21. The outer periphery of the middle diameter section is provided with an external thread, and the locking nut 3 is provided with an internal thread matching the external thread, so that the locking nut 3 can be threadedly connected to the outside of the middle diameter section of the shell 1. The locking nut 3 is sleeved on the outside of the left end connecting tube 21, as shown in FIG. Figure 1 As shown, the inner side of the locking nut 3 is fitted with the left end connecting tube 21. After the locking nut 3 is threadedly connected with the middle diameter section and tightened, due to the setting of the left annular boss, the locking nut 3 drives the left annular boss to be close to the middle diameter section, so that the end face of the middle diameter section is tightly matched with the end face of the left end connecting tube 21, so that the left end of the airbag is tightly connected with the second thread locking mechanism.

[0042] Furthermore, if Figure 1 As shown, the locking nut 3 includes an internal threaded hole section provided with the internal thread and a closing section arranged at one end of the internal threaded hole section, the inner side of the closing section is in contact with the left end connecting tube 21 and the left annular boss; the internal threaded hole section faces the housing 1 and is threadedly connected to the outer side of the middle diameter section. The outer periphery of the locking nut 3 is sealed with the inner wall of the process outer tube 7. Specifically, as Figure 1As shown, an annular protrusion extending radially outward is provided on the outer side of the locking nut 3, and the outer periphery of the annular protrusion is in contact with the inner wall of the process outer cylinder 7. A radial sealing ring 5 is provided between the locking nut 3 and the inner wall of the process outer cylinder 7. That is, a sealing ring installation groove is provided on the annular protrusion for inserting the radial sealing ring 5. Under the extrusion effect, the radial sealing ring 5 seals the gap between the locking nut 3 and the process outer cylinder 7. The closing section of the locking nut is in contact with the left end connecting tube 21 and the left annular boss, so that the left end of the airbag is fixed more tightly to prevent leakage of the left end of the liquid side of the airbag; the outer periphery of the locking nut 3 is sealed with the inner wall of the process outer cylinder 7 to prevent leakage of the gas side between the airbag and the process outer cylinder 7.

[0043] Embodiment 3 is different from Embodiment 2 in that Figure 1 As shown, the housing 1 further includes a left small diameter section coaxially connected to the middle diameter section and a right small diameter section coaxially arranged with the left small diameter section. The diameters of the left small diameter section and the right small diameter section are smaller than those of the middle diameter section, and the left small diameter section and the right small diameter section can extend into the left end connecting tube 21 and the right end connecting tube 22 respectively. The outer circumference of the left small diameter section fits with the inner wall of the left end connecting tube 21, and the outer circumference of the right small diameter section fits with the inner wall of the right end connecting tube 22. The left small diameter section and the right small diameter section are connected through a connecting section; the connecting section is arranged in the airbag 2. In this embodiment, the connecting section is also arranged coaxially with the middle diameter section and the airbag, that is, the connecting section is arranged in the middle part of the airbag 2 along the axial direction of the airbag 2. By arranging a left small diameter section and a right small diameter section on the shell to fit respectively with the inner wall of the left end connecting tube 21 and the inner wall of the right end connecting tube 22, the sealing effect on the liquid side of both ends of the airbag is improved, and the left small diameter section and the right small diameter section are connected by the connecting section, so that the two ends of the entire airbag are strung together through the shell, which is convenient for disassembly. The threaded locking mechanism and the airbag can be pulled out together for replacement, which saves time and effort and is convenient and quick.

[0044] Furthermore, in this embodiment, if Figure 1 As shown, the side of the closing section of the locking nut 3 at the left end is in close contact with the end face of the middle diameter section of the shell 1, and the closing section of the locking nut 3 works together with the end face of the middle diameter section and the left small diameter section of the shell to form the sealing groove 1, which is tightly matched with the sealing end of the left end of the airbag to improve the sealing performance of the left end.

[0045] Embodiment 4 is different from Embodiment 3 in that Figure 1As shown, the shell 1 also includes a large diameter section coaxially connected to the middle diameter section, the large diameter section includes a first step section located inside the process outer cylinder 7 and a second step section located outside the process outer cylinder 7, the outer periphery of the first step section is sealed with the inner wall of the process outer cylinder 7, one end of the first step section is coaxially connected to the middle diameter section, and the other end is coaxially connected to the second step section. In this embodiment, the large diameter section, the middle diameter section, the left small diameter section, the right small diameter section and the connecting section are an integrated structure. The diameter of the first step section is larger than the diameter of the middle diameter section, so that the outer periphery of the first step section extends beyond the locking nut 3 and fits the inner wall of the process outer cylinder 7. The diameter of the second step section is larger than the first step section, so that after the outer periphery of the second step section extends beyond the process outer cylinder 7, the end face of the second step section close to the first step section can be pressed and fitted with the outer end face of the process outer cylinder 7. In this embodiment, the second step section and the outer end surface of the process outer tube 7 are provided with matching bolt holes, and the housing 1 and the process outer tube 7 are connected by bolts passing through the bolt holes of the second step section and the process outer tube 7, so that the fixation of the accumulator is more stable. After the second step section and the outer end surface of the process outer tube 7 are pressed tightly, not only the thread locking mechanism at the right end of the airbag is pressed tightly to the bottom of the process outer tube 7, but also the entire accumulator is pressed and fixed in the process outer tube 7, and the accumulator can be pulled out of the process outer tube 7 as a whole for replacement by simply disassembling the connection between the housing 1 and the process outer tube 7.

[0046] In addition, a radial sealing ring 5 is provided between the outer periphery of the first step section and the inner wall of the process outer cylinder 7, that is, a sealing ring installation groove is provided on the outer periphery of the first step section for installing the radial sealing ring 5. Under the extrusion effect, the radial sealing ring 5 seals the gap between the large diameter section of the housing 1 and the process outer cylinder 7, further ensuring the sealing performance of the left end of the gas side of the airbag.

[0047] Embodiment 5 is different from Embodiment 4 in that Figure 1 As shown, the thread locking mechanism 1 includes a locking nut 3 sleeved on the outside of the right end connecting tube 22 and a gland 4 threadedly connected to the locking nut 3. The structure of the locking nut 3 is the same as the locking nut 3 in the thread locking mechanism 2 in Example 2. The locking nut 3 of the thread locking mechanism 1 and the locking nut 3 in the thread locking mechanism 2 are symmetrically arranged at both ends of the airbag. The inner side of the closing section of the locking nut 3 of the thread locking mechanism 1 fits with the right end connecting tube 22 and the right annular boss. The outer periphery of the gland 4 is provided with an external thread, and the locking nut 3 is provided with an internal thread matching the external thread. The locking nut 3 is screwed on the gland 4. Due to the setting of the right annular boss, the locking nut 3 drives the right annular boss to fit tightly against the left end face of the gland 4, so that the left end face of the gland 4 is tightly matched with the end face of the left end connecting tube 21, ensuring that the right end of the airbag is tightly connected to the thread locking mechanism 2, and preventing leakage of the right end of the liquid side of the airbag.

[0048] Furthermore, if Figure 1As shown, the side of the closing section of the locking nut 3 at the right end is in close contact with the gland 4, and the closing section of the locking nut 3 works together with the gland 4 and the right small diameter section of the shell to form the sealing groove 2, which is tightly matched with the sealing end at the right end of the airbag to ensure that the accumulator fluid and gas will not mix or contact each other.

[0049] In addition, the outer periphery of the locking nut 3 of the thread locking mechanism 1 is also sealed with the inner wall of the process outer cylinder 7. Figure 1 As shown, an annular protrusion extending radially outward is provided on the outer side of the locking nut 3, and the outer periphery of the annular protrusion is in contact with the inner wall of the process outer cylinder 7. A radial sealing ring 5 is also provided between the locking nut 3 and the inner wall of the process outer cylinder 7. That is, a sealing ring installation groove is provided on the annular protrusion for inserting the radial sealing ring 5. Under the extrusion, the radial sealing ring 5 seals the gap between the locking nut 3 and the process outer cylinder 7. The outer periphery of the locking nut 3 is sealed with the inner wall of the process outer cylinder 7 to prevent leakage of the gas side between the airbag and the process outer cylinder 7.

[0050] Furthermore, due to the connection between the housing and the process outer cylinder 7, the right end surface of the gland 4 is pressed against the bottom of the process outer cylinder 7. An axial sealing ring 6 is provided between the gland 4 and the bottom of the process outer cylinder 7 to ensure the airtightness of the outer side of the airbag.

[0051] Embodiment 6 is different from Embodiment 5 in that Figure 1 As shown, the housing 1 also includes a tail section coaxially connected to the right small diameter section, and the gland 4 is sleeved on the tail section and sealed with the tail section. The gland 4 is sleeved on the tail section of the housing 1, which facilitates the assembly and positioning of the gland 4. Among them, a retaining ring 8 is sleeved on the tail section and seals with the gland 4, further improving the sealing of the right end of the airbag. In this embodiment, the retaining ring 8 is a steel wire retaining ring for the shaft, and a retaining ring groove is provided on the tail end, which clamps the gland 4 when in use; when disassembled, the gland falls off together with the housing under the action of the retaining ring, thereby ensuring that the gland and the housing are disassembled together, which is convenient for the overall replacement of the accumulator.

[0052] Furthermore, the shell is provided with a fluid channel, and the fluid channel passes through the large diameter section, the middle diameter section, the left small diameter section, the connecting section, the right small diameter section and the tail section in sequence. The bottom of the process outer cylinder 7 is provided with a fluid outlet, the tail section extends into the fluid outlet 10, and the fluid channel passes through the tail section to the fluid outlet 10. And a plurality of perforations are provided on the connecting section to allow the fluid in the fluid channel to enter the airbag 2. The shell passes through the entire accumulator, which not only ensures that the two sides of the channel will not leak when the fluid channel passes through the accumulator, but also makes it convenient to drag the entire accumulator out of the process outer cylinder for updating and maintenance through the shell.

[0053] Embodiment 7 is different from Embodiment 6 in that Figure 1As shown, a plurality of equalizing grooves 71 are provided at corresponding positions of the process outer cylinder 7. In this embodiment, a plurality of circumferential equalizing grooves 71 are provided at intervals on the inner wall of the process outer cylinder 7. By providing the equalizing grooves 71, when the gas side is inflated, the phenomenon of uneven compression and expansion of the airbag caused by the single action of the gas can be effectively avoided.

[0054] Embodiment 8 is different from Embodiment 1 in that Figure 1 As shown, the material of the airbag 2 is butyl chloride, so that the airbag 2 has good expansion and contraction performance, avoiding the surface cracking of the airbag 2 during the frequent contraction and expansion process.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that any modification to the technical solutions described in the aforementioned embodiments, or any equivalent replacement of some or all of the technical features therein, within the spirit and principles of the present invention, and such modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. An easily detachable micro adjustable airbag accumulator, characterized in that: The invention comprises an air bag (2) for being arranged in a process outer cylinder (7); one end of the air bag (2) is threadedly connected to a first thread locking mechanism, and the other end is threadedly connected to a second thread locking mechanism; the second thread locking mechanism is connected to the process outer cylinder (7) to tighten the first thread locking mechanism against the bottom of the process outer cylinder (7); the first thread locking mechanism and the second thread locking mechanism are respectively sealed with the process outer cylinder (7).

2. The easily detachable micro adjustable air bag accumulator according to claim 1 is characterized in that: The airbag (2) comprises an airbag body, a left end connecting tube (21) and a right end connecting tube (22) connected at both ends of the airbag body, the left end connecting tube (21) being provided with a left annular boss protruding radially outward at one end away from the airbag body, and the right end connecting tube (22) being provided with a right annular boss protruding radially outward at one end away from the airbag body.

3. The easily detachable micro adjustable air bag accumulator according to claim 2 is characterized in that: The second thread locking mechanism comprises a locking nut (3) sleeved on the outside of the left end connecting tube (21) and a housing (1) threadedly connected to the locking nut (3); the housing (1) comprises a middle diameter section, the end surface of the middle diameter section is tightly matched with the end surface of the left end connecting tube (21); the outer periphery of the middle diameter section is provided with an external thread, and the locking nut (3) is provided with an internal thread matching the external thread so that the locking nut (3) is threadedly connected to the middle diameter section of the housing (1).

4. The easily detachable micro adjustable air bag accumulator according to claim 3 is characterized in that: The locking nut (3) comprises an internal threaded hole section provided with the internal thread and a closing section arranged at one end of the internal threaded hole section, the inner side of the closing section is in contact with the left end connecting tube (21) and the left annular boss; the outer periphery of the locking nut (3) is sealingly matched with the inner wall of the process outer tube (7).

5. The easily detachable micro adjustable air bag accumulator according to claim 3 or 4, characterized in that: The shell (1) further comprises a left small diameter section coaxially connected to the middle diameter section and a right small diameter section coaxially arranged with the left small diameter section, the outer periphery of the left small diameter section being in contact with the inner wall of the left end connecting tube (21), and the outer periphery of the right small diameter section being in contact with the inner wall of the right end connecting tube (22); and the left small diameter section and the right small diameter section are connected via a connecting section; the connecting section is arranged in the airbag (2).

6. The easily detachable micro adjustable air bag accumulator according to claim 5 is characterized in that: The shell is provided with a fluid channel, and the fluid channel passes through the middle diameter section, the left small diameter section, the connecting section and the right small diameter section in sequence, and a plurality of perforations are provided on the connecting section to allow the fluid in the fluid channel to enter the airbag (2).

7. The easily detachable micro adjustable air bag accumulator according to claim 6 is characterized in that: The shell (1) further comprises a large diameter section coaxially connected to the middle diameter section, the large diameter section comprising a first step section located inside the process outer cylinder (7) and a second step section located outside the process outer cylinder (7), the outer periphery of the first step section being sealingly matched with the inner wall of the process outer cylinder (7), one end of the first step section being coaxially connected to the middle diameter section and the other end being coaxially connected to the second step section, the diameter of the second step section being larger than the first step section, the end face of the second step section close to the first step section being pressed and matched with the outer end face of the process outer cylinder (7); and the outer end faces of the second step section and the process outer cylinder (7) being provided with matching bolt holes.

8. The easily detachable micro adjustable air bag accumulator according to claim 6 or 7, characterized in that: The thread locking mechanism comprises a locking nut (3) sleeved on the outside of the right end connecting tube (22) and a pressure cap (4) threadedly connected to the locking nut (3); one end of the pressure cap (4) is pressed against the bottom of the process outer tube (7), and the other end is pressed against the end surface of the right end connecting tube (22); the outer periphery of the pressure cap (4) is provided with an external thread, and the locking nut (3) is provided with an internal thread that cooperates with the external thread; the inner side of the closing section of the locking nut (3) is in contact with the right end connecting tube (22) and the right annular boss; the side of the closing section of the locking nut (3) presses the pressure cap (4).

9. The easily detachable micro adjustable air bag accumulator according to claim 8, characterized in that: The housing (1) further comprises a tail section coaxially connected to the right small diameter section, and the gland (4) is sleeved on the tail section and sealingly cooperates with the tail section.

10. The easily detachable micro adjustable air bag accumulator according to any one of claims 2 to 4, 6, 7 and 9, characterized in that: An air side space is formed between the outer side of the airbag body and the process outer cylinder (7), and a plurality of pressure equalizing grooves (71) are provided at corresponding positions of the process outer cylinder (7); and a filling port leading to the air side space is provided on the process outer cylinder (7).

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