Door group composed of fluid controllable doors

Abstract

The utility model discloses a door group consisting of fluid controllable doors. The door group comprises four fluid controllable doors, namely a door a, a door b, a door c and a door d, the fluid controllable door comprises a first cavity, a second cavity, a sealing channel, a sealing piece A, a sealing piece B, a first channel, a second channel, a cover plate and a sliding piece. The gate group is composed of four fluid controllable gates adopting the axial sealing technology, the fluid controllable gates have the balancing and adjusting functions, and the gate group can control the flowing direction of fluid media and adjust the flow of the fluid media in unit time.

Description

TECHNICAL FIELD

[0001] The utility model relates to a door group which is composed of four fluid controllable doors adopting axial sealing technology, the fluid controllable door has balancing and adjusting functions, and the door group can control the flow direction of fluid medium flowing through the door group and adjust the flow of fluid medium per unit time. BACKGROUND

[0002] At present, most of the driving members provided on the market and capable of controlling the flow direction of fluid medium and adjusting the flow per unit time are combined structures of three-way reversing valves and throttle valves or proportional valves, among which the three-way reversing valve is mainly composed of a valve body and a spool, the valve body and the spool have complex structures and are difficult to process, in order to prevent leakage, the cavity on the valve body and the spool need high-precision processing technology to match each other, and the cleanliness of the fluid medium is also required to be high, in the work, the cavity in the spool and the valve body are rubbed for a long time, and wear is inevitable, the wear causes internal leakage of the three-way reversing valve, the three-way reversing valve only has the function of changing the flow direction of fluid medium, does not have the function of adjusting the flow of fluid medium, and therefore needs to be combined with functional valves such as throttle valves or proportional valves, which further increases the complexity of the product structure and the difficulty of action control. SUMMARY

[0003] Therefore, the technical problem to be solved by the utility model is to provide a door group which has low machining precision requirement, simple structure, is not easy to wear, has balancing function, and can be opened by a small driving force, the door group has the functions of changing the flow direction of fluid medium and adjusting the flow of fluid medium.

[0004] The technical scheme of the utility model is a door group composed of fluid controllable doors, including fluid controllable doors, including a door, a b door, a c door, and a d door four fluid controllable doors, the fluid controllable door includes a first cavity, a second cavity, a sealing channel, an A sealing element, a B sealing element, a first channel, a second channel, a cover plate, and a sliding element.

[0005] The sealing channel is located between the first chamber and the second chamber, and a sealing position on the sealing channel is close to the first chamber; the A sealing element is installed at one end of the first chamber away from the sealing channel, the B sealing element is installed at one end of the second chamber away from the sealing channel, the A sealing element and the B sealing element are symmetrically arranged, a cover plate with a shaft hole is arranged at the outer end of the A sealing element and the outer end of the B sealing element respectively; the other end of the first channel is an F port, and the other end is communicated between the A sealing element on the first chamber and the sealing channel, the other end of the second channel is a G port, and the other end is communicated between the B sealing element on the second chamber and the sealing channel; the sliding element is composed of a shaft and a C sealing element located at the middle section of the shaft; the shaft at one end of the sliding element passes through the A sealing element matched with the shaft, and passes out of the shaft hole on the cover plate of the first chamber, the shaft at the other end of the sliding element passes through the sealing channel, passes through the B sealing element matched with the shaft, and passes out of the shaft hole on the cover plate of the second chamber; the C sealing element and the sealing position are matched with each other, and the C sealing element on the shaft is always located in the first chamber; the a door, the b door, the c door and the d door are combined, the cover plates of the a door and the d door on the second chamber and the cover plates of the b door and the c door on the first chamber are connected, the cover plates of the a door and the d door on the first chamber and the cover plates of the b door and the c door on the second chamber are connected, the G port on the a door and the F port on the c door are communicated together and leave a T port, and the G port on the b door and the F port on the d door are communicated together and leave a U port, that is, a door group is formed; supports are connected to the outer ends of the a door and the d door on the second chamber and the outer ends of the b door and the c door on the first chamber.

[0006] According to the door group composed of the fluid controllable door, a section of the shaft with a length equal to the length of the second chamber has a trapezoidal longitudinal section shape; the longitudinal section of the sliding element is a trapezoidal shaft, or the large bottom of the trapezoid is close to the C sealing element, or the small bottom of the trapezoid is close to the C sealing element; when the C sealing element and the sealing position are mutually attached and closed, the section of the shaft with a trapezoidal longitudinal section shape is located in the sealing channel and the second chamber.

[0007] The sliding element can move back and forth along the direction of the shaft, and the back and forth movement of the sliding element can make the C sealing element and the sealing position be in the attached and closed state or be separated and communicated. The sliding element can move back and forth along the direction of the shaft, and different moving distances make the effective channel cross-sectional area between the shaft and the sealing position change. The present application provides a door group composed of four same fluid controllable doors (rotating the two doors of c door and d door by 180 degrees, and the mirror image after rotation is the same as a door or b door).

[0008] According to the door group composed of the fluid controllable door, the F port on the a door of the door group and the F port on the b door are communicated together and leave an inlet, and the G port on the c door of the door group and the G port on the d door are communicated together and leave a discharge outlet.

[0009] According to the door group composed of the fluid-controllable door, one-way valves are further connected at the inlet and the outlet.

[0010] According to the door group composed of the fluid-controllable door, the A sealing element and the B sealing element are selected from one of a gas seal and an oil seal; and the C sealing element is selected from one of a sealing gasket, a sealing block, a gas seal and an oil seal.

[0011] According to the door group composed of the fluid-controllable door, sealing covers are connected at the outer ends of the first chambers of the a door and the d door and the outer ends of the second chambers of the b door and the c door.

[0012] According to the door group composed of the fluid-controllable door, a stopper and an elastic component are arranged on the shafts of the a door and the d door penetrating through the second chamber cover plate shaft hole and the b door and the c door penetrating through the first chamber cover plate shaft hole, respectively; the stopper is connected with the shaft in a cross direction, and the elastic component is sleeved on the shaft.

[0013] According to the door group composed of the fluid-controllable door, a communication passage is arranged in the door group to communicate the inner space of the support and the inner space of the sealing cover. The communication passage is located in a region that does not hinder the passage of various passages in the door group.

[0014] According to the door group composed of the fluid-controllable door, a pushing element capable of pushing the shaft is installed at one end of the support of the door group.

[0015] The door group composed of four fluid-controllable doors adopting the axial sealing technology can control the flow direction of the fluid medium in the fluid medium system and adjust the flow rate of the fluid medium per unit time.

[0016] The door group composed of four fluid-controllable doors adopting the axial sealing technology can control the flow direction of the fluid medium in the fluid medium system and adjust the flow rate of the fluid medium per unit time.

[0017] When the C seal and the sealing position are in the closed state, the pressure between the C seal and the sealing position is mainly generated by the elastic component, so the C seal and the sealing position are almost not worn. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1A , fluid controllable door schematic diagram.

[0019] Figure 1B , Figure 1C , Figure 1D , fluid controllable door, the schematic diagram of C seal in different positions in the fluid controllable door.

[0020] Figure 2A , door group schematic diagram.

[0021] Figure 2B , door group perspective view. The communication between the channels is virtualized in the figure.

[0022] Figure 2C , the door group is provided with a bracket, a sealing cover, a communication channel, a screw rod and a nut, and the schematic diagram of most structures of the door group is virtualized in the figure.

[0023] Figure 3A In the fluid medium system, the pushing member in the door group stops pushing, and the pushing member is in the original position, and the four fluid controllable doors are in the closed state.

[0024] Figure 3B In the fluid medium system, the pushing member in the door group makes a door and d door in the open state, and b door and c door in the closed state.

[0025] Figure 3C In the fluid medium system, the pushing member in the door group makes b door and c door in the open state, and a door and d door in the closed state.

[0026] In the figure, element, 1-a door, 2-b door, 3-c door, 4-d door, 5-fluid controllable door, 6A-1st chamber, 6B-2nd chamber, 7A-sealing way, 7B-sealing position, 8A-A seal, 8B-B seal, 8C-C seal, 9A-1st channel, 9B-2nd channel, 10A-sliding member, 10B-shaft, 10C-stop member, 11A-bracket, 11B-bracket bottom plate, 11C-sealing cover, 12-F port, 13-G port, 14-T port, 15-U port, 16-inlet, 17-outlet, 18A-cover plate, 18B-shaft hole, 19-door group, 20-connection pipe, 21-working cylinder, 22-piston, 23-pushing member, 24A-A lever group, 24B-B lever group, 25-elastic component, 26-one-way valve, 27-communication channel, 28-screw rod and nut DETAILED DESCRIPTION

[0027] Figure 3A 、 Figure 3B 、 Figure 3C The T port and U port of the door group can be connected to the working cylinder through a connecting pipe in the fluid medium system. The power supply, control circuit, and devices for providing pressure fluid medium to the fluid control are not shown in the figure.

[0028] The door group works in a fluid medium system, which can also be called a hydraulic system or a pneumatic system. The fluid medium system includes the door group 19, connecting pipe 20, working cylinder 21, fluid medium, pressure device, power supply, and electric control. The pushing member 23 in the door group is the A lever group 24A and B lever group 24B.

[0029] The door group 19 is composed of four fluid control doors 5 (see Figure 1C ). The fluid control door 5 is composed of a first chamber 6A, a second chamber 6B, a sealing channel 7A, an A sealing member 8A, a B sealing member 8B, a cover plate 18A, a first passage 9A, a second passage 9B, and a sliding member 10A composed of a shaft 10B and C sealing member 8C. The upper and lower cover plates are used to press the A sealing member and B sealing member. The shaft hole 18B on the cover plate is a passage for the shaft of the sliding member to pass through the cover plate. The sliding member can move back and forth along the direction of the shaft. The back and forth movement of the sliding member can make the C sealing member and the sealing position 7B adhere to each other or separate from each other. When the C sealing member adheres to the sealing position 7B, the fluid control door is in a closed state (see Figure 1A 、 Figure 1B ). When the C sealing member separates from the sealing position, the fluid control door is in an open state (see Figure 1C 、 Figure 1D ). The four fluid control doors, i.e., a door 1, b door 2, c door 3, and d door 4, are combined together in the above-mentioned manner to form the door group 19 (see Figure 2A , Figure 2B , Figure 2A 、 Figure 2B The C sealing member in the above-mentioned manner is a sealing block. The G port 13 on the a door and the F port 12 on the c door are connected together and leave a T port 14. The G port 13 on the b door and the F port 12 on the d door are connected together and leave a U port 15, which are both output ports. The T port and U port can be connected to the related working cylinder 21 or other related devices through a connecting pipe 20.

[0030] In a preferred embodiment, the length of the shaft from the end of the C seal is approximately equal to the length of the second chamber, and the longitudinal section of the shaft is trapezoidal. When the C seal and the sealing position are in close contact, the shaft with the trapezoidal longitudinal section is located in the sealing channel and the second chamber. Because the section of the shaft near the C seal is trapezoidal, the effective cross-sectional area of the channel between the shaft and the sealing position changes with the movement of the shaft. Depending on the different requirements of the product and the function, the shaft with the trapezoidal longitudinal section on the sliding member can have the large base of the trapezoid close to the C seal (see Fig. 1, where the C seal is an air seal or an oil seal), or the small base of the trapezoid close to the C seal (see Fig. 2, where the C seal is a sealing gasket). Figure 1A Figure 1B Figure 1B

[0031] In a preferred embodiment, the F port on the a door is connected to the F port on the b door, and an inlet 16 is left. The G port on the c door is connected to the G port on the d door, and an outlet 17 is left. The purpose is to facilitate the connection of the door group with other equipment.

[0032] In a preferred embodiment, a one-way valve 26 is connected at the inlet 16 and the outlet 17, respectively. The purpose is that when the fluid medium system loses pressure during operation, the door group can be automatically locked. At the inlet, the direction of the one-way valve is to allow the fluid medium to enter the door group through the inlet via the one-way valve. At the outlet, the direction of the one-way valve is to allow the fluid medium in the door group to be discharged through the outlet via the one-way valve (see Fig. 3). Figure 3A

[0033] In a preferred embodiment, the A seal 8A, the B seal 8B, and the C seal 8C can be air seals, oil seals, etc. according to different fluid media. When the C seal is an air seal, an oil seal, etc., the C seal is opposite the lip of the A seal (see Fig. 1). The C seal can also be a sealing gasket, a sealing block, etc. The sealing gasket is made of rubber or other elastic materials (see Fig. 2). The C seal made of a harder material than the sealing gasket is called a sealing block. The sealing block can also be integrally formed with the shaft (see Fig. 3). Figure 1A Figure 1B Figure 2A Figure 3A

[0034] In a preferred embodiment, a bracket 11A is connected at the outer end of the second chamber of the a door and the d door, and the outer end of the first chamber of the b door and the c door. The bracket can enclose the cover plate on the second chamber of the a door and the d door, the shaft passing through the cover plate of the second chamber of the a door and the d door, and the cover plate on the first chamber of the b door and the c door, and the shaft passing through the cover plate of the first chamber of the b door and the c door (see Fig. 1). Figure 2B Figure 2C ​​​​​​​​​​

[0035] In a preferred embodiment, a sealing cover 11C is connected to the outer end of the first chamber of the a-door and d-door and the outer end of the second chamber of the b-door and c-door, and the sealing cover can enclose the cover plate of the first chamber of the a-door and d-door, the shaft passing through the cover plate of the first chamber of the a-door and d-door, and the cover plate of the second chamber of the b-door and c-door, and the shaft passing through the cover plate of the second chamber of the b-door and c-door (see Figure 2B , Figure 2C ).

[0036] In a preferred embodiment, a stopper 10C and a spring 25 are respectively arranged on the shaft passing through the cover plate of the second chamber of the a-door and d-door and the shaft passing through the cover plate of the first chamber of the b-door and c-door. In this embodiment, the spring 25 is a spring, the stopper is connected to the shaft in a cross direction, and the spring is sleeved on the shaft. The spring on the a-door and d-door is located between the cover plate and the stopper, and the spring on the b-door and c-door is located between the bottom plate 11B of the bracket and the stopper (see Figure 3A ).

[0037] In a preferred embodiment, a communication passage 27 is arranged in the bracket of the door set to communicate the space at one end of the bracket and the space at one end of the sealing cover. The communication passage is located in a region that does not interfere with the passage of each passage in the door set. The screw rod can pass through the communication passage, and the screw rod and the nut 28 can assemble the upper cover plate and the lower cover plate of the door set (see Figure 2C ).

[0038] In a preferred embodiment, a pushing member capable of pushing the shaft is arranged at one end of the bracket of the door set. The pushing member 23 is composed of an A-lever set 24A and a B-lever set 24B.

[0039] Generally, the pushing member is in an original position, that is, the pushing member does not push the shaft, and the four C-seals and the four sealing positions are respectively in a mutually abutting state (see Figure 3A ). The A-lever set can push the shaft passing through the shaft hole of the cover plate of the second chamber of the a-door and d-door, so that the C-seal on the a-door and d-door is gradually separated from the sealing position 7B (see Figure 3B ). When the A-lever set stops pushing the shaft on the a-door and d-door and gradually retreats to the original position of the pushing member, the spring can make the C-seal on the sliding member of the a-door and d-door gradually return to the position of mutual abutment with the sealing position (see Figure 3A ). The B-lever set can push the shaft passing through the shaft hole of the cover plate of the first chamber of the b-door and c-door, so that the C-seal on the b-door and c-door is gradually separated from the sealing position (see Figure 3C ). When the B-lever set stops pushing the shaft on the b-door and c-door and gradually retreats to the original position of the pushing member, the spring can make the C-seal on the sliding member of the b-door and c-door gradually return to the position of mutual abutment with the sealing position (see Figure 3A ).

[0040] Balancing function of fluid controllable door

[0041] Door group in running state

[0042] The following description does not consider the frictional resistance between the A seal, the B seal and the shaft. In order to achieve the balancing function of the fluid controllable door, the scheme of using three seals, i.e. the A seal, the B seal and the C seal, on one sealing door structure is adopted. The so-called sealing door in the utility model is the combination of the C seal and the sealing position. When the fluid controllable door uses three seals, the hole diameter of the sealing position closed by the C seal on the fluid controllable door is the same as the shaft diameter of the shaft embraced by the A seal and the B seal, according to the Pascal law (a simple description is that the pressure in each place of a closed container full of fluid medium is the same, and the pressure received is proportional to the area), the axial thrust of the fluid medium in the direction of the two ends of the shaft tends to be in a balanced state, and the pushing member only needs to push the sliding member with a pushing force greater than the spring force to open the fluid controllable door. When the pushing member stops pushing the sliding member and gradually retreats to the original position, the spring can make the C seal on the sliding member also gradually return to the closed state of mutual adhesion with the sealing position. When the C seal and the sealing position are in the closed state of mutual adhesion, the C seal and the sealing position do not slide relative to each other, and thus no friction caused by sliding occurs. Therefore, the C seal and the sealing position are almost not worn.

[0043] If the shaft diameter of the B seal and the embraced shaft is appropriately increased, the axial thrust of the fluid medium in the direction of the B seal end of the shaft is greater than the axial thrust of the fluid medium in the direction of the A seal end of the shaft. In this state, the spring is no longer needed. When the pushing member stops pushing the shaft and gradually retreats to the original position, the C seal can gradually return to the position of mutual adhesion with the sealing position under the action of the fluid medium with pressure.

[0044] According to the above principle, appropriate A seal, B seal, shaft diameter of the embraced shaft, hole diameter of the appropriate sealing position and C seal can be selected, and the spring with appropriate elasticity is combined together, so that the pushing member can select a more appropriate pushing force to complete the work of pushing the sliding member.

[0045] Adjusting flow function of fluid controllable door

[0046] Door group in running state

[0047] The pushing member pushes the shaft to different degrees, so that the distance of the movement of the shaft is different, and the effective passage cross-sectional area generated between the shaft and the sealing position also changes (see Figure 1B 、 Figure 1C 、 Figure 1D), the flow rate of the fluid medium passing through the fluid controllable gate per unit time also changes, and the change in the flow rate per unit time causes the speed of the piston 22 in the working cylinder 21 driven by the gate group to change. If the difference between the diameters of the large base and the small base is reduced, the pushing member can more accurately change the cross-sectional area of the effective passage of the fluid controllable gate when the pushing member pushes the shaft.

[0048] Control process of the gate group to control the flow direction of the fluid medium

[0049] The gate group is in the running state

[0050] In the gate group, the pushing member stops pushing the shaft and the pushing member is in the original position, and the four fluid controllable gates are in the closed state, the fluid medium in the gate group stops flowing, and the piston 22 in the working cylinder 21 stays at the position when the fluid medium stops flowing, at this time, the gate group is in the locked position (see Figure 3A ).

[0051] Under the action of the pushing member, when the b gate and the c gate are in the closed state and the a gate and the d gate are in the separated open state, due to different pushing degrees, the distances of the shaft moving are different, and the cross-sectional areas of the effective passages between the shafts on the a gate and the d gate and the sealing positions also change. The fluid medium from the inlet passes through the sealing channel 7A of the a gate, the T port 14, and enters one end of the piston in the working cylinder. Since the c gate is in the closed state, the fluid medium cannot be discharged through the G port of the c gate. The fluid medium entering the working cylinder pushes the piston in the working cylinder to move in the direction of the U port. The fluid medium at the other end of the piston is discharged through the discharge port and the one-way valve. At this time, the gate group is in the T working position (see Figure 3B ). As long as the C sealing elements between the a gate and the d gate and the sealing positions are in the separated open state, the gate group is in the T working position.

[0052] Under the action of the pushing member, when the a gate and the d gate are in the closed state and the b gate and the c gate are in the separated open state, due to different pushing degrees, the distances of the shaft moving are different, and the cross-sectional areas of the effective passages between the shafts on the b gate and the c gate and the sealing positions also change. The fluid medium from the inlet passes through the sealing channel 7A of the b gate, the U port 15, and enters one end of the piston in the working cylinder. Since the d gate is in the closed state, the fluid medium cannot be discharged through the G port of the d gate. The fluid medium entering the working cylinder pushes the piston in the working cylinder to move in the direction of the T port. The fluid medium at the other end of the piston is discharged through the c gate in the separated open state, the discharge port, and the one-way valve. At this time, the gate group is in the U working position (see Figure 3C ). As long as the C sealing elements between the b gate and the c gate and the sealing positions are in the separated open state, the gate group is in the U working position.

[0053] It can be seen that the flow direction of the fluid medium in the fluid medium system can be controlled by pushing the shaft in the door group by different programs, and the flow rate per unit time through the door group will change accordingly when the pushing degree of the shaft is different.

[0054] Since the pushing member can change whether and how to push the shaft at any time as needed, the flow state of the fluid medium in the door group can be changed into the T position or the locked position or the U position at any time, and the moving direction, moving speed and moving distance of the piston in the working cylinder driven by the door group will also change accordingly.

[0055] The beneficial effects of the utility model are that: the door group is in a running state, and the pushing member can change the flow direction of the fluid medium by pushing the shaft in the door group by different programs. The effective passage cross-sectional area between the shaft and the sealing position changes when the pushing degree of the shaft is different, which causes the flow rate per unit time to change, thereby playing a function of regulating the flow rate of the fluid medium. The fluid controllable door in the door group has a balance function, so that the opening of the fluid controllable door only needs a small pushing force. Unidirectional valves are arranged at the outer ends of the inlet and outlet of the door group, and when the fluid medium provided to the door group loses pressure, the door group can be automatically locked.

[0056] The products using the axial sealing technology hardly produce wear between the sealing member and the sealing position, thereby prolonging the service life of the door group. The products using the axial sealing technology have lower requirements for the cleanliness of the fluid medium, thereby reducing the operation cost of the door group. The products using the axial sealing technology have lower requirements for the machining precision, the product structure is simple, and the machining is easy, thereby reducing the production cost of the door group.

[0057] Embodiment preface

[0058] The embodiment of the door group contained in the fluid medium system is a specific embodiment based on the appropriate conditions, the pushing member in the door group has various structural types, and in the embodiment, only the A lever group and the B lever group are used as the pushing member, and the related combination of the pushing member and the door group in the door group which is not described in detail should not be regarded as the limitation of the door group of the utility model to the combination of other structural forms of the pushing member.

[0059] The embodiment only simply describes the running state of the door group. Since the pushing member can change whether and how to push the shaft at any time as needed, the flow state of the fluid medium in the door group can be changed into the T position or the locked position or the U position at any time, and the moving direction, moving speed and moving distance of the piston in the working cylinder driven by the door group will also change accordingly. Such a case will not be described in detail in the embodiment.

[0060] In the embodiment, the door group is in a running state

[0061] (1), when the pusher makes a door, b door, c door, d door are all in the closed state, fluid medium access is closed, the door group is in the lock position (see Figure 3A ), as long as the pusher is in the original position, the four fluid controllable doors are in the closed state, and the door group is in the lock position.

[0062] (2), when the pusher makes a door, d door are all in the open state, b door, c door are all in the closed state, fluid medium from the check valve, inlet, through a door, from T port into the one end of the working cylinder, the piston in the working cylinder moves to the U port direction under the push of the fluid medium, the fluid medium at the other end of the piston is discharged from the open d door, through the exhaust port, check valve, at this time, it is called that the door group is in T position (see Figure 3B ), as long as the C seal on a door and d door is in the separated open state, it is called that the door group is in T position.

[0063] (3), when the pusher makes a door, b door, c door, d door are all in the closed state, fluid medium access is closed, the door group is in the lock position again (see Figure 3A ).

[0064] (4), when the pusher makes b door, c door are all in the open state, a door, d door are all in the closed state, fluid medium from the check valve, inlet, through b door, from U port into the one end of the working cylinder, the piston in the working cylinder moves to the T port direction under the push of the fluid medium, the fluid medium at the other end of the piston is discharged from the open c door, through the exhaust port, check valve, at this time, it is called that the door group is in U position (see Figure 3C ), as long as the C seal on b door and c door is in the separated open state, it is called that the door group is in U position.

[0065] (5), when the pusher makes a door, b door, c door, d door are all in the closed state, the door group is in the lock position again (see Figure 3A ).

[0066] Generally, the door group has a lock position before and after T position in the running process, and also has a lock position before and after U position.

Claims

1. A door group consisting of a fluid controllable door, comprising a fluid controllable door, characterized in that: The fluid controllable door comprises a first chamber, a second chamber, a sealing channel, an A sealing element, a B sealing element, a first channel, a second channel, a cover plate, and a sliding element. The sealing channel is located between the first chamber and the second chamber, and a sealing position on the sealing channel is close to the first chamber.

2. A door set of fluid controlled door components as claimed in claim 1, characterised in that: The A sealing element is installed at one end of the first chamber away from the sealing channel, and the B sealing element is installed at one end of the second chamber away from the sealing channel.

3. A door assembly of claim 1, wherein: The A sealing element and the B sealing element are symmetrically arranged.

4. A door set of fluid controlled door components as claimed in claim 3, characterised in that: The other end of the first channel is an F port, and the other end of the second channel is a G port.

5. A door assembly of claim 1, wherein: The sliding element is composed of a shaft and a C sealing element located at the middle of the shaft.

6. A door set of fluid controlled door components as defined in claim 1, characterized in that: The C sealing element is matched with the sealing position.

7. A door assembly of claim 1, wherein: The A sealing element and the B sealing element are selected from one of a gas seal or an oil seal.

8. A door assembly of claim 1, wherein: The C sealing element is selected from one of a sealing gasket, a sealing block, a gas seal, or an oil seal.

9. A door set of fluid controlled door components as claimed in claim 1, characterised in that: A sealing cover is connected to the first chamber of the a door and the d door and the second chamber of the b door and the c door. A stopper and an elastic component are arranged on the shaft of the a door and the d door and the b door and the c door. A communication channel is arranged in the door group to communicate the space in the bracket with the space in the sealing cover. A pushing element is arranged at one end of the bracket of the door group to push the shaft.

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