阅读说明：本技术 一种响应快的机械排气装置 (Quick-response mechanical exhaust device ) 是由 周卫荣 吴建新 陶一军 陈农 于 2020-03-25 设计创作，主要内容包括：本发明涉及排气装置,针对机械式排气装置不灵敏的问题,提供一种响应快的机械排气装置,包括底部设有进油孔的集气盒,集气盒内的上壁设有密封筒,密封筒上方有排气孔,密封筒下表面为设有通孔的隔板,通孔下方依次设有排气阀和浮块,浮块受油量影响上下移动从而带动排气阀进出通孔,浮块上连有若干弹性带状物,弹性带状物的另一端固定在集气盒侧壁的同一高度上,弹性带状物位置水平时处于压缩状态,以此时的油位的位置为临界点,油位在临界点上方时浮块提供使排气阀与通孔密封配合的力,油位低于临界点时浮块带动排气阀与通孔分离。浮块轻微下移,水平的弹性带状物就会产生一个较大的向下的弹力,使浮块与排气阀迅速分离。(The invention relates to an exhaust device, and provides a quick-response mechanical exhaust device aiming at the problem that a mechanical exhaust device is insensitive. The floating block moves downwards slightly, and the horizontal elastic ribbon generates a larger downward elastic force to separate the floating block from the exhaust valve quickly.)

1. A quick-response mechanical exhaust device comprises a gas collecting box (1), wherein an oil inlet (11) is arranged at the bottom of the gas collecting box (1), and the quick-response mechanical exhaust device is characterized in that a hollow cylindrical sealing cylinder (13) is arranged in the gas collecting box (1), the upper surface and the lower surface of the sealing cylinder (13) are respectively an upper wall of the gas collecting box (1) and a horizontal partition plate (2), the sealing cylinder (13) is hermetically connected with the upper wall and the partition plate (2), an exhaust hole (12) is formed in the upper surface of the sealing cylinder (13) and communicated with the outside, an exhaust valve (3) is arranged below the partition plate (2), a through hole (21) is formed in the partition plate (2) at the position corresponding to the exhaust valve (3), the exhaust valve (3) can axially move to enter and exit the through hole (21), the exhaust valve (3) and the through hole (21) are in sealing fit when in butt joint, a floating block (6) is arranged, even have a plurality of elastic component (5) on floating block (6), the other end of elastic component (5) is fixed on the same height of gas collection box (1) lateral wall, is in compression state when elastic component (5) position level to the position of oil level at this moment is critical point, floating block (6) provide and make discharge valve (3) and through-hole (21) seal complex power when the oil level is above critical point, floating block (6) drive discharge valve (3) and through-hole (21) separation when the oil level is less than critical point.

2. A quick-response mechanical exhaust device according to claim 1, characterized in that the exhaust valve (3) is provided with a horizontal plate (33), a spherical air bag (34) is arranged above the horizontal plate (33), the top of the spherical air bag (34) is provided with a thin tubular air nozzle (341), and when the upper surface of the horizontal plate (33) abuts against the lower surface of the partition plate (2), the outer side of the spherical air bag (34) abuts against the inner wall of the through hole (21) for sealing.

3. A quick-response mechanical vent according to claim 2, wherein the spherical bladder (34) is slightly larger than the through hole (21).

4. The quick-response mechanical exhaust device is characterized in that the longitudinal sections of the exhaust valve (3) and the through hole (21) are two similar trapezoids, the short sides of each trapezoid are arranged on the upper side, the long side of each trapezoid of the through hole (21) is arranged between the long side and the short side of each trapezoid of the exhaust valve (3), and the side of the exhaust valve (3) is provided with an elastic clamping part (35) to fix the exhaust valve (3) in the through hole (21).

5. A quick response mechanical exhaust device according to claim 1, 2 or 3, characterized in that a cylindrical sleeve (4) is arranged between the floating block (6) and the exhaust valve (3), a first straight rod (31) is arranged below the exhaust valve (3), the first straight rod (31) is fixed in the cylindrical sleeve (4), a second straight rod (61) is arranged above the floating block (6), the elastic component (5) is connected with the second straight rod (61), the elastic component (5) is blocked at the bottom end of the cylindrical sleeve (4), the floating block (6) moves up and down to enable the second straight rod (61) to move up and down in the cylindrical sleeve (4), and the connecting point of the elastic component (5) and the second straight rod (61) is just at the bottom end of the cylindrical sleeve (4) when the oil level is at the critical point.

6. A quick response mechanical air release device according to claim 5, characterized in that the distance from the connection point of the elastic component (5) and the second straight rod (61) to the vertex of the second straight rod (61) is half of the distance of the cylindrical sleeve (4).

7. The quick-response mechanical exhaust device is characterized in that the elastic component (5) comprises a pressure spring (51), an inner rod (52) and an outer cylinder (53), one end of the outer cylinder (53) is fixed at the top end of the floating block (6), the other end of the outer cylinder is provided with an opening, one end of the inner rod (52) is hinged to the side wall of the gas collecting box (1), the other end of the inner rod is always positioned in the opening of the outer cylinder (53) and can move freely, and two ends of the pressure spring (51) are respectively fixed at the fixed ends of the inner rod (52) and the outer cylinder (53).

8. A quick-response mechanical exhaust device according to claim 1, characterized in that the exhaust valve (3) is provided with a limiting plate (32) at the bottom, and the limiting plate (32) limits the lateral movement of the exhaust valve (3).

9. A quick-response mechanical exhaust device according to claim 1, characterized in that the upper surface of the sealing cylinder is provided with a manual button (7), the manual button (7) penetrates through the top of the gas collecting box (1), and the exhaust valve (3) in the through hole (21) can be ejected by pressing the manual button (7).

10. The quick-response mechanical exhaust device is characterized in that a second partition plate (73) is arranged above the partition plate (2) at intervals, a second exhaust hole (731) is formed in the second partition plate (73), a spring stop seat (71) is arranged between the second partition plate (73) and the air collection box (1) of the manual button (7), a spring (72) is sleeved on the manual button (7), and the upper end and the lower end of the spring (72) respectively abut against the spring stop seat (71) and the second partition plate (73) in a natural state.

Technical Field

The invention relates to an exhaust device, in particular to a mechanical exhaust device with quick response.

Background

The hydraulic circuit of the hydraulic system generates some air bubbles and accumulates at a relatively high position, at which the oil transfer speed changes. If the gas is accumulated at the top of the oil pump, the gas is gradually increased to enable the oil level in the pump to be lower than the upper part of the piston port, the pump power is affected, the pressure building efficiency of the oil pump is reduced, the oil pump runs for a long time or is frequently pressed, and the gas must be exhausted in time to enable the equipment to normally run. The exhaust usually requires equipment to be out of service or operated during operation, which causes equipment to be powered with reduced reliability and a certain safety risk, and the observation of gas accumulation and the discharge of gas also require a great deal of human input, and it is difficult to grasp when manual exhaust is required.

For this purpose, an automatic air exhausting device has been invented, for example, a "clutch oil path air exhausting device" disclosed in chinese patent document, which publication No. CN201338590Y, has an electric oil pump connected to a power supply, a transparent hose is connected to an oil suction port of the electric oil pump, and an oil outlet of the electric oil pump leads to an oil storage tank or an oil pot through a pipe. The transparent hose is connected with the exhaust bolt of the clutch, the electric oil pump is used for exhausting, the labor intensity is reduced, the exhaust efficiency is high, the oil quantity is not lost, the structure is simple, the carrying is convenient, the operation is simple and fast, and the clutch can be widely applied to the exhaust operation of various clutches. However, in the case of such a device for exhausting air using an electric power structure, if the power is cut off or the electric circuit fails, the exhaust function is lost, and manual exhaust is impossible, which affects the safe operation of the equipment.

However, the existing mechanical automatic exhaust device is less sensitive to exhaust than the electric exhaust device, and therefore an ideal technical structure is needed to solve the above problems.

Disclosure of Invention

The invention provides a quick-response mechanical exhaust device for overcoming the problem of low sensitivity of the existing mechanical exhaust device, wherein when the oil level in a low-pressure oil loop is reduced to a set value due to air, a horizontal elastic component has a tendency of extending, so that even if a floating block slightly moves downwards, the elastic component can generate a larger downward elastic force, the floating block is quickly separated from an exhaust valve, and the opening sensitivity of the exhaust valve is obviously improved.

In order to achieve the purpose, the invention adopts the following technical scheme: the oil level control device comprises an air collecting box, wherein an oil inlet hole is formed in the bottom of the air collecting box, a hollow cylindrical sealing cylinder is arranged in the air collecting box, the upper surface and the lower surface of the sealing cylinder are respectively an upper wall of the air collecting box and a horizontal partition plate, the sealing cylinder is in sealing connection with the upper wall and the partition plate, an exhaust hole is formed in the upper surface of the sealing cylinder and communicated with the outside, an exhaust valve is arranged below the partition plate, a through hole is formed in the partition plate in a position corresponding to the exhaust valve, the exhaust valve can axially move so as to enter and exit the through hole, the exhaust valve is in sealing fit with the through hole when abutting against the through hole, a floating block is arranged below the exhaust valve and moves up and down under the influence of the oil level, a plurality of elastic assemblies are connected onto the floating block, the other ends of the elastic assemblies are fixed on the same height of the side wall of, when the oil level is lower than the critical point, the floating block drives the exhaust valve to be separated from the through hole.

When the device is newly installed, the floating block is positioned at the bottom of the gas collecting box, the elastic component is lower than the horizontal state, and the exhaust valve is separated from the through hole. After the oil level is used, oil slowly enters the gas collecting box from the oil inlet hole at the bottom, the floating block slowly moves upwards under the action of buoyancy, the elastic component also slowly tends to be horizontal, when the oil level reaches a set critical point, the position of the elastic component is horizontal, the liquid level rises again at the moment to enable the floating block to slightly move upwards, the elastic component in a compressed state can generate larger upward elastic force, under the action of the elastic force, the floating block can generate a trend of rapidly moving upwards, and along with the rise of the oil level, the floating block is in contact with the exhaust valve and drives the exhaust valve to rise together until the exhaust valve is completely matched with the through hole of the partition plate in a sealing mode. The oil level continues to rise until the oil is filled under the partition plate, and the oil does not seep out because the upper and lower spaces of the partition plate are isolated. When the oil level is lowered to a set critical point, the elastic component is horizontal, the liquid level is lowered again to enable the floating block to slightly move downwards, the elastic component in a compression state can generate a large downward elastic force, and under the action of the elastic force, the floating block drives the exhaust valve to be separated from the through hole and starts to exhaust until the exhaust is completed. Then a new round of oil inlet and air exhaust is carried out.

The invention controls automatic exhaust by a mechanical mode, is not limited by electric power and has wide applicability. The oil level when being in the horizontality with elastic component establishes to critical point position, and the discharge valve just separates with the through-hole when the oil level is less than the critical point, and the device just begins the exhaust at certain volume at gaseous collection like this to have gas just to arrange, avoided frequent action process, can prolong the life of device. The elastic component is a critical point when being horizontal, and the elastic component is in a compressed state at the moment and has a tendency of extension, so that even if the floating block slightly moves downwards, the elastic component can generate a larger downward elastic force, so that the floating block is quickly separated from the exhaust valve, and the opening sensitivity of the exhaust valve is obviously improved. The sealing cylinder is provided in order to ensure airtightness. Because the upper and lower sides of the partition plate need to be isolated after the exhaust valve is in sealing fit with the through hole of the partition plate, the partition plate needs to be in sealing fit with the side wall of the gas collecting box. However, if the cross section of the gas collecting box is too large, the partition plate needs to be made large, and the circumference of the gas collecting box contacting with the partition plate is too large to be sealed. In order to improve the applicability of the device, a sealing cylinder is arranged between the partition plate and the upper wall of the gas collection box, and the sealing performance of the sealing cylinder, the upper wall of the gas collection box and the partition plate can be ensured. Therefore, the sealing cylinder can be made smaller no matter what the shape and size of the gas collecting box is, the size of the partition plate is reduced, materials are saved, meanwhile, the contact perimeter of the partition plate and the sealing cylinder is reduced, and sealing is facilitated. The cross section of the sealing cylinder is circular, and the circular perimeter is the smallest when the areas are the same, and the circular perimeter has no dead angle, so that the sealing performance is improved.

Preferably, a horizontal plate is arranged on the exhaust valve, a spherical air bag is arranged above the horizontal plate, a thin-tube-shaped air nozzle is formed in the top of the spherical air bag, and when the upper surface of the horizontal plate abuts against the lower surface of the partition plate, the outer side of the spherical air bag abuts against the inner wall of the through hole to play a sealing role. The spherical air bag is squeezed to be reduced, the spherical air bag can restore to a spherical shape after air enters from the air faucet in a natural state, and the spherical air bag is soft and is well attached to the side wall, so that the sealing property can be improved. As a further preference, the spherical balloon is slightly larger than the through hole. The spherical air bag has the tendency of recovering the original shape, so that the side surface can be completely attached to the through hole, the sealing property is further improved, and the exhaust valve can not fall off from the through hole due to the self gravity; and thus the requirement for the machining accuracy of the through hole is reduced.

Discharge valve with the longitudinal section of through-hole is two similar trapezoids, and trapezoidal equal minor face is last, and the trapezoidal long limit of through-hole is between the trapezoidal long limit and the trapezoidal minor face of discharge valve, and the discharge valve side is equipped with elasticity block portion and fixes discharge valve in the through-hole. Because the exhaust valve enters the through hole from the lower part, the through hole with the larger lower part and the smaller upper part is beneficial to the entering of the exhaust valve, and the inclined side edge can play a role in guiding. The longitudinal sections of the exhaust valve and the through hole are two similar trapezoids, so that the adjacent side edges are parallel, the exhaust valve and the through hole can be well attached, and the sealing performance can be improved. In order to avoid excessive upward movement of the exhaust valve and even separation of the exhaust valve from the through hole, the bottom end of the exhaust valve is limited to be wider than the bottom end of the through hole or the top end of the exhaust valve is limited to be wider than the top end of the through hole, so that the exhaust valve cannot be separated from the through hole all the time when moving upward. The through-hole can be worn out to elasticity block portion extrusion deformation, wears out behind the through-hole reconversion and fixes discharge valve on the through-hole, and discharge valve can make the arc block rubber warp again when receiving certain power down, discharge valve and through-hole separation.

Preferably, a cylindrical sleeve is arranged between the floating block and the exhaust valve, a first straight rod is arranged below the exhaust valve and fixed in the cylindrical sleeve, a second straight rod is arranged above the floating block and connected with the second straight rod, the elastic component is blocked at the bottom end of the cylindrical sleeve, the floating block moves up and down to enable the second straight rod to move up and down in the cylindrical sleeve, and a connecting point of the elastic component and the second straight rod is just arranged at the bottom end of the cylindrical sleeve when the oil level is at a critical point. Set up a cylindrical sleeve and inject floating block and discharge valve on the same axle, guarantee that the floating block shifts up and can touch discharge valve, make control more stable. The floating block and the exhaust valve are in mutual contact through the straight rod, the contact area is small, and the opening sensitivity of the exhaust valve is further improved. The bottom end of the cylindrical sleeve blocks the elastic component, the connecting point is just at the bottom end of the cylindrical sleeve when the oil level is at a critical point, and only when the oil level is lower than the critical point, the straight rod II starts to pull the cylindrical sleeve, so that the valve is opened, and air is not exhausted. Preferably, the distance from the connecting point of the elastic component and the second straight rod to the vertex of the second straight rod is half of that of the cylindrical sleeve. The benefits of this arrangement are: in the process that the floating block moves upwards, the straight rod II just contacts the straight rod I when the critical point is reached, and the floating block moves upwards again to drive the straight rods to move upwards one by one.

When the device is newly installed, the floating block is positioned at the bottom of the gas collecting box, the elastic component is lower than the horizontal state, and the exhaust valve is separated from the through hole. After the start of use, oil slowly gets into the gas collection box from the inlet port of bottom, and the floating block slowly shifts up under the buoyancy effect, and elastic component also slowly tends to the level, when the oil level reachs the critical point of establishing: the elastic component is horizontal and in a compressed state, the straight rod II just contacts with the straight rod I, the liquid level rises again at the moment to enable the floating block to move upwards slightly, the elastic component in the compressed state can generate a large upward elastic force, the elastic force enables the floating block to move upwards rapidly, and the floating block drives the exhaust valve to rise together until the exhaust valve is completely matched with the through hole of the partition plate in a sealing mode. The oil level continues to rise until the oil is filled under the partition plate, and the oil does not seep out because the upper and lower spaces of the partition plate are isolated. In the use process of the low-pressure oil loop, gas can be generated gradually, the gas enters the gas collecting box through the oil inlet hole, the gas is gathered at the upper part of the gas collecting box because of small specific gravity, the oil level gradually descends along with the increase of the gas, the floating block also gradually descends, when the oil level descends to a set critical point, the position of the elastic component is horizontal, the connecting point of the elastic component and the straight rod II is just at the bottom end of the cylindrical sleeve, the liquid level descends again to enable the floating block to slightly descend, the elastic component in a compression state can be enabled to generate large downward elastic force, under the action of the elastic force, the floating block drives the exhaust valve to be separated from the through hole, and the exhaust starts until the exhaust is completed. Then a new round of oil inlet and air exhaust is carried out.

Preferably, the elastic component comprises a pressure spring, an inner rod and an outer cylinder, one end of the outer cylinder is fixed at the top end of the floating block, an opening is formed in the other end of the outer cylinder, one end of the inner rod is hinged to the side wall of the gas collection box, the other end of the inner rod is always located in the opening of the outer cylinder and can move freely, and two ends of the pressure spring are fixed at the fixed ends of the inner. The inner rod is positioned in the opening of the outer cylinder and can move freely, so that the distance between the two fixed ends of the inner rod and the outer cylinder is variable, and a deformation distance is provided for the pressure spring.

Preferably, the bottom of the exhaust valve is provided with a limiting plate, and the limiting plate limits the lateral movement of the exhaust valve.

Preferably, the top of the gas collection box is provided with a manual button, the manual button penetrates through the top of the gas collection box, and the exhaust valve in the through hole can be ejected out by pressing the manual button downwards. When the exhaust valve cannot be opened for some reason, the exhaust valve can be manually exhausted. Preferably, the gas collecting box is provided with a second partition plate above the partition plate at intervals, the second partition plate is provided with a second exhaust hole, the manual button is provided with a spring stop seat between the second partition plate and the gas collecting box, the manual button is sleeved with a second spring, and the upper end and the lower end of the second spring respectively abut against the spring stop seat and the second partition plate in a natural state. The second partition plate plays a role in guiding, and the second spring can automatically reset after the manual button is pressed, so that the second partition plate is convenient to use next time.

Therefore, the invention has the following beneficial effects: (1) according to the invention, the oil level of the elastic component in a horizontal state is set as the critical point position, and the exhaust valve is separated from the through hole when the oil level is lower than the critical point, so that the device starts to exhaust when gas is collected to a certain amount, and the exhaust is not performed when the gas is available, thereby avoiding frequent action processes and prolonging the service life of the device; (2) the elastic component is a critical point when being horizontal, and the elastic component is in a compressed state at the moment and has a tendency of extension, so that even if the floating block slightly moves downwards, the elastic component can generate a larger downward elastic force to quickly separate the floating block from the exhaust valve, thereby obviously improving the opening sensitivity of the exhaust valve; (3) the automatic exhaust is controlled by a mechanical mode, and the device is not limited by power and has wide applicability.

Drawings

FIG. 1 is a schematic illustration of the venting state of the present invention.

FIG. 2 is a schematic diagram of the present invention in a critical point state.

Fig. 3 is a schematic view of the closed state of the exhaust valve of the present invention.

Fig. 4 is a schematic structural diagram of another embodiment of the present invention.

In the figure: 1. the gas collecting box comprises a gas collecting box body 11, an oil inlet hole 12, an exhaust hole 13, a sealing cylinder 131, a support leg 2, a partition plate 21, a through hole 3, an exhaust valve 31, a straight rod I, a straight rod 32, a limiting plate 33, a horizontal plate 34, a spherical air bag 341, an air nozzle 35, an elastic clamping part 4, a cylindrical sleeve 5, an elastic component 51, a pressure spring 52, an inner rod 53, an outer cylinder 6, a floating block 61, a straight rod II, a straight rod 7, a manual button 71, a spring stop seat 72, a spring 73, a partition plate II, a partition plate 731 and an exhaust hole II.

Detailed Description

The invention is further described with reference to the following detailed description and accompanying drawings.

As shown in fig. 1-3, a quick-response mechanical exhaust device comprises a gas collecting box 1, wherein the bottom and the top of the gas collecting box 1 are respectively provided with an oil inlet 11 and an exhaust hole 12 for collecting gas in a low-pressure oil loop, and the gas collecting box is also a shell of the whole device. A horizontal partition plate 2 is arranged in the gas collecting box 1 and close to the upper part, the gas collecting box 1 is divided into an upper part and a lower part by the partition plate 2, and the air tightness of the contact surface of the partition plate 2 and the gas collecting box 1 needs to be ensured. A hollow cylindrical sealing cylinder 13 is arranged in the gas collecting box 1, the upper surface and the lower surface of the sealing cylinder 13 are respectively the upper wall of the gas collecting box 1 and the clapboard 2 which are in sealing connection, and the exhaust hole 12 is positioned above the sealing cylinder 13. Therefore, the sealing cylinder 13 can be made smaller no matter what the shape and size of the gas collecting box 1 is, the size of the partition plate 2 is reduced, materials are saved, meanwhile, the contact perimeter of the partition plate 2 and the sealing cylinder 13 is reduced, and sealing is facilitated. The cross section of the sealing cylinder 13 is circular, because the circular perimeter is the smallest when the areas are the same, and the circular perimeter has no dead angle, which is more beneficial to improving the sealing performance. The central axis of the sealing cylinder 13 coincides with the central axis of the gas collecting box 1. Preferably, the sealing cylinder 13 is further provided with two legs 131 below the partition plate 2, the bottom ends of the legs 131 are located on the bottom wall of the gas collecting box 1, and the legs 131 can support the sealing cylinder 13.

On the central axis of the gas collecting box 1, an exhaust valve 3, a cylindrical sleeve 4 and a floating block 6 are sequentially arranged below the partition board 2. The partition board 2 is provided with a corresponding through hole 21 right above the exhaust valve 3, and the exhaust valve 3 and the through hole 21 are mutually matched to realize the opening and closing of the exhaust valve 3. Since the exhaust valve 3 is inserted into the through hole 21 from below, it is preferable that the exhaust valve 3 and the through hole 21 of the partition plate 2 are formed in a trapezoidal shape having a small top and a large bottom, which facilitates the insertion of the exhaust hole 12 and provides a guide function. Further, in order to prevent the exhaust valve 3 from moving up excessively and even out of the through hole 21, it may be defined that the bottom end of the exhaust valve 3 is wider than the bottom end of the through hole 21 or the top end of the exhaust valve 3 is wider than the top end of the through hole 21. The elastic clamping portion 35 is arranged above the exhaust valve 3, the elastic clamping portion 35 can be an arc-shaped rubber block shown in the figure, the arc-shaped rubber block can penetrate through the through hole 21 through extrusion deformation, the exhaust valve 3 is fixed on the through hole 21 through the restoration after penetrating through the through hole 21, the exhaust valve 3 can deform through a certain downward force, and the exhaust valve 3 is separated from the through hole 21. A straight rod 31 is arranged below the exhaust valve 3, preferably, a horizontal cross rod is further fixed on the straight rod 31 near the lower part to serve as a limiting plate 32, and two ends of the horizontal cross rod are located on two supporting legs 131 and can move up and down along the supporting legs 131, mainly for limiting the exhaust valve 3 on the central axis of the gas collecting box 1. The bottom end of the straight rod I31 is fixed above the cylindrical sleeve 4, and a straight rod II 61 is arranged above the floating block 6. The floating block 6 moves up and down to enable the second straight rod 61 to move up and down in the cylindrical sleeve 4, and the second straight rod 61 can contact the first straight rod 31. Set up a cylindrical sleeve 4, can inject floating block 6 and discharge valve 3 on the same axle, guarantee that floating block 6 shifts up can touch discharge valve 3, make control more stable. It is of course possible to function without the cylindrical sleeve 4. Two elastic components 5 are connected to the second straight rod 61, each elastic component 5 comprises a pressure spring 51, an inner rod 52 and an outer cylinder 53, one end of each outer cylinder 53 is fixed to the top end of the corresponding floating block 6, an opening is formed in the other end of each outer cylinder 53, one end of each inner rod 52 is hinged to the side wall of the corresponding gas collecting box 1, the other end of each inner rod 52 is located in the opening of each outer cylinder 53 all the time and can move freely, and two ends of each pressure spring 51 are. The present embodiment uses a compression spring 51, but other elastic ropes may be used. The inner rod is located in the opening of the outer cylinder 53 and can move freely, so that the distance between the two fixed ends of the inner rod 52 and the outer cylinder 53 is variable, and a deformation distance is provided for the pressure spring 51. The cylindrical sleeve 4 is provided with elongated holes at both sides thereof for the elastic members 5 to move up and down, but the bottom end of the cylindrical sleeve 4 blocks the elastic members 5. The other end of the elastic component 5 is fixed on the same height of the side wall of the gas collecting box 1, and the position is mainly determined by critical points: a critical oil level may be set as desired, less than or equal to the maximum amount of gas that can be allowed to exist in the oil circuit. At this level it is necessary to ensure that the two ends of the elastic element 5 are equally high, i.e. horizontal. It is also necessary to define the state in which the elastic element 5 is in compression. Preferably, the distance from the connecting point of the elastic component 5 and the floating block 6 to the vertex of the second straight rod 61 is half of that of the cylindrical sleeve 4. The benefits of this arrangement are: when the oil level of the floating block 6 is at a critical point in the rising process, the straight rod two 61 just props against the straight rod one 31, and the floating block 6 moves upwards again to drive the straight rod one 31 to move upwards together. The connecting point is just right at the bottom end of the cylindrical sleeve 4 when the oil level is at the critical point, and only after the oil level is lower than the critical point, the straight rod II 61 starts to pull the cylindrical sleeve 4, so that the exhaust valve 3 is opened, and air is not exhausted. Preferably, the central axes of the two elastic elements 5 and also of the gas collecting box 1 are also defined to be coplanar, which ensures stability.

The using process of the invention is as follows: when the device is newly installed, the floating block 6 is positioned at the bottom of the gas collecting box 1, the elastic component 5 is lower than the horizontal state, and the exhaust valve 3 is separated from the through hole 21. After the use begins, oil slowly gets into gas collection box 1 from inlet port 11 of bottom, and floating block 6 slowly moves up under the buoyancy, and elastic component 5 also slowly tends to the level, when the oil level reached the critical point that has set up: the elastic component 5 is horizontal and in a compressed state, the straight rod two 61 is just contacted with the straight rod one 31, at the moment, the liquid level rises again to enable the floating block 6 to move upwards slightly, the elastic component 5 in the compressed state can generate a large upward elastic force, the elastic force enables the floating block 6 to generate a trend of moving upwards rapidly, the floating block 6 drives the exhaust valve 3 to rise together until the elastic clamping part 35 of the exhaust valve 3 penetrates through the through hole 21 and then is matched with the partition plate 2 to fix the exhaust valve 3 in the through hole 21, and the exhaust valve 3 is completely matched with the through hole 21 of the partition plate 2 in a sealing mode. The oil level continues to rise until the oil is filled under the partition plate 2, and the oil does not seep out because the upper and lower spaces of the partition plate 2 are isolated. When the low-pressure oil loop is used, gas is gradually generated, the gas enters the gas collecting box 1 through the oil inlet hole 11, the gas is gathered at the upper part of the gas collecting box 1 due to small specific gravity, the oil level gradually descends along with the increase of the gas, the floating block 6 also gradually moves downwards, when the oil level descends to a set critical point, the position of the elastic component 5 is horizontal, the connecting point of the elastic component 5 and the straight rod II 61 is just at the bottom end of the cylindrical sleeve 4, the liquid level descends again to enable the floating block 6 to slightly move downwards, the elastic component 5 in a compression state can generate large downward elastic force, and under the action of the elastic force, the floating block 6 drives the exhaust valve 3 to be separated from the through hole 21, and exhaust is started until the exhaust is completed. Then a new round of oil inlet and air exhaust is carried out.

There is also a second embodiment of the cooperation of the venting valve 3 and the through hole 21. As shown in FIG. 4, a horizontal plate 33 is provided on the air vent valve 3, a rubber spherical air bag 34 is provided above the horizontal plate 33, a thin tubular air nozzle 341 is provided at the top of the spherical air bag 34, the whole shape is similar to the shape of an ear washing ball, the upper half part of the through hole 21 of the partition board 2 is adapted to the spherical air bag 34, the lower half part of the through hole is larger for the spherical air bag 34 to enter, but the lower half part of the through hole is smaller than the natural diameter of the spherical air bag 34 to prevent the air bag from falling out of the through. When the upper surface of the horizontal plate 33 abuts against the lower surface of the partition 2, the spherical air bag 34 fills the upper half of the through hole 21. The spherical air bag 34 becomes small by the compression and easily enters the through hole 21. In a natural state, the spherical air bag 34 returns to a spherical shape after air enters from the air nozzle 341 and abuts against the side wall of the through hole 21. The spherical air bag 34 is soft and can be adhered to the side wall of the through hole 21, so that the sealing performance can be improved. As a further preference, the spherical balloon 34 may be slightly larger than the through hole 21. The spherical air bag 34 tends to be restored to the original state, so that the side surface of the spherical air bag can be completely attached to the side surface of the through hole 21, and the sealing property is further improved; in addition, the requirement for the machining accuracy of the through hole 21 is reduced.

According to the invention, the oil level of the elastic component 5 in a horizontal state is set as the critical point position, and the exhaust valve 3 is separated from the through hole 21 when the oil level is lower than the critical point, so that the device starts to exhaust when gas is collected to a certain amount, and the gas is exhausted when no gas exists, thereby avoiding frequent action processes and prolonging the service life of the device. The elastic component 5 is a critical point when being horizontal, and the elastic component 5 is in a compressed state at the moment and has a tendency of extension, so even if the floating block 6 slightly moves downwards, the elastic component 5 can generate a larger downward elastic force, so that the floating block drives the exhaust valve 3 to rapidly leave the through hole 21, and the opening sensitivity of the exhaust valve 3 is obviously improved.

In order to deal with the situation that the exhaust valve 3 can not be opened, a manual button 7 is arranged on the top of the gas collecting box 1, the manual button 7 penetrates through the top of the gas collecting box 1, and the exhaust valve 3 in the through hole 21 can be ejected by pressing the manual button 7. Preferably, the gas collecting box 1 is provided with a second partition plate 73 above the partition plate 2 at an interval, the second partition plate 73 is provided with a second exhaust hole 731, the manual button 7 is provided with a second spring 72 stop seat between the second partition plate 73 and the gas collecting box 1, the manual button 7 is sleeved with the second spring 72, and the upper end and the lower end of the second spring 72 respectively abut against the second spring 72 stop seat and the second partition plate 73 in a natural state. The second partition plate 73 has a guiding function, and the second spring 72 can enable the second manual button 7 to automatically reset after being pressed, so that the second manual button is convenient to use next time. In the place with electricity, as shown in fig. 1, the right side of the gas collecting box 1 is also provided with two parallel circuits, lamps with different colors on the two circuits respectively indicate normal work and exhaust faults, when the oil level is lower than a set critical value in the working process, the exhaust is not smooth, the lamp with the exhaust fault is lighted (for the prior art, the principle is not specifically described), and then the manual button 7 can be used for timely processing.

In order to facilitate the observation of the oil level on the appearance of the gas collecting box 1, a magnet can be arranged on the floating block 6, and the floating block 6 can be used as a buoy for indicating the oil level in cooperation with a magnetic level sensor (which is not shown in the figure for the prior art).