Door group composed of fluid controllable doors

Abstract

The invention 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 the 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 present invention relates to a door group consisting of four fluid controllable doors using axial sealing technology. The fluid controllable doors have balancing and regulating functions. The door group can control the flow direction of a fluid medium flowing through the door group and regulate the flow rate of the fluid medium per unit time. Background Art

[0002] At present, the driving parts available on the market that can control the flow direction of fluid media and adjust the flow rate per unit time are mostly combined structures of three-way reversing valves and throttle valves or proportional valves. Among these products, the three-way reversing valve is mainly composed of a valve body and a slide valve. The valve body and the slide valve have complex structures and are difficult to process. In order to prevent leakage, the chamber on the valve body and the slide valve must be processed with high-precision technology to make the two fit each other, and the cleanliness requirements for the fluid medium are also very high. During work, the slide valve and the chamber in the valve body are rubbed for a long time, and wear is inevitable. Wear causes internal leakage in the three-way reversing valve. The three-way reversing valve only has the function of changing the flow direction of the fluid medium, and does not have the function of adjusting the flow rate of the fluid medium. Therefore, it must be used in combination with functional valves such as throttle valves or proportional valves, which increases the complexity of the product structure and the difficulty of motion control. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is to provide a door group with low processing accuracy requirements, simple structure, not easy to wear, with a balancing function, and can be opened with a small driving force. The door group must have the function of changing the flow direction of the fluid medium and also have the function of regulating the flow rate of the fluid medium.

[0004] The technical solution of the present invention is a door group composed of fluid-controllable doors, including fluid-controllable doors, including four fluid-controllable doors, namely, door a, door b, door c, and door d; the fluid-controllable doors include: a first chamber, a second chamber, a sealing channel, an A sealing member, a B sealing member, a first channel, a second channel, a cover plate, and a sliding member;

[0005] The sealing path is located between the first chamber and the second chamber, and the sealing position on the sealing path is close to the first chamber; the A seal is installed at one end of the first chamber away from the sealing path, and the B seal is installed at one end of the second chamber away from the sealing path. The lips of the A seal and the B seal are opposite to each other, and a cover plate with an axial hole is respectively provided at the outer end of the A seal and the outer end of the B seal; one end of the first channel is communicated with the first chamber, connected between the A seal and the sealing path, and the other end of the first channel is an F port, one end of the second channel is communicated with the second chamber, connected between the B seal and the sealing path, and the other end of the second channel is a G port, and the sliding member is composed of a shaft and a C seal located in the middle of the shaft, and the C seal on the shaft The sealing member is located in the first chamber, and the C sealing member matches the sealing position; the shaft at one end of the sliding member passes through the A sealing member matching the shaft and passes through the shaft hole on the cover plate of the first chamber, and the shaft at the other end of the sliding member passes through the sealing path, passes through the B sealing member matching the shaft and passes through the shaft hole on the cover plate of the second chamber, and the a door, b door, c door and d door are combined together, the cover plates on the second chamber of the a door and d door and the cover plates on the first chamber of the b door and c door are connected together, the cover plates on the first chamber of the a door and d door and the cover plates on the second chamber of the b door and c door are connected together, the G port on the a door is connected with the F port on the c door and a T port is left, the G port on the b door is connected with the F port on the d door and a U port is left, and a door group is formed.

[0006] According to a door group composed of a fluid-controllable door of the present invention, a section of the shaft starting from the C-seal end and having a length approximately equal to the length of the second chamber has a trapezoidal longitudinal section shape; when the C-seal and the sealing position are fitted and closed with each other, the section of the shaft with a trapezoidal longitudinal section shape is located in the sealing path and the second chamber; the shaft with a trapezoidal longitudinal section shape on the sliding member can be a trapezoidal large bottom close to the C-seal, or a trapezoidal small bottom close to the C-seal.

[0007] The sliding member can move back and forth along the axis, and the back and forth movement of the sliding member can make the C seal and the sealing position in a close state or a separated open state. The above sliding member can move back and forth along the axis, and different movement distances make the effective channel cross-sectional area between the axis and the sealing position change accordingly. The present invention provides a door group composed of 4 identical fluid controllable doors (the two doors C and D are each rotated 180 degrees, and the mirror image after rotation is the same as door A or door B).

[0008] According to a door group composed of fluid-controllable doors of the present invention, the F port on the door of the door group a is connected with the F port on the door of the door group b and an inlet is left, and the G port on the door of the door group c is connected with the G port on the door of the door group d and an outlet is left.

[0009] According to the door group composed of a fluid-controllable door of the present invention, further, a one-way valve is connected to the inlet, and a one-way valve is also connected to the outlet.

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

[0011] According to a door group composed of fluid-controllable doors of the present invention, brackets are connected to the outer ends of the second chambers of doors a and d and the outer ends of the first chambers of doors b and c.

[0012] According to a door group composed of fluid-controllable doors of the present invention, sealing covers are connected to the outer ends of the first chambers of the a and d doors and the outer ends of the second chambers of the b and c doors.

[0013] According to a door group composed of fluid-controllable doors of the present invention, a stopper and an elastic component are respectively arranged on the axis of the a door and the d door passing through the axis hole of the second chamber cover plate, and on the axis of the b door and the c door passing through the axis hole of the first chamber cover plate; the stopper is connected to the axis in the cross direction, and the elastic component is sleeved on the axis.

[0014] According to a door group composed of fluid-controllable doors of the present invention, a connecting channel capable of connecting the space inside the bracket with the space inside the sealing cover is provided in the door group, and the connecting channel is located in an area that does not hinder the passage of various channels in the door group.

[0015] According to a door group composed of fluid-controllable doors of the present invention, a pushing member capable of pushing the shaft is installed at one end of a bracket of the door group.

[0016] The beneficial effects of the present invention are:

[0017] The door group is composed of 4 fluid-controllable doors using axial sealing technology. The door group 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. The fluid-controllable door using axial sealing technology has low requirements for processing accuracy and cleanliness of the fluid medium. During operation, there is almost no wear between the seal and the sealing position. Even if there is some wear, it will not have a major negative impact on the sealing performance. Since only the door group can complete the functions of controlling the flow direction of the fluid medium and adjusting the flow rate of the fluid medium per unit time, the product structure is simple and easy to control. The disadvantage of axial sealing technology is that when the pressure of the fluid medium used in the equipment is high, the product without a balancing function and using axial sealing technology has a large pressure difference at both ends of the door, and the door is difficult to open. The present invention uses the principle of Pascal's law to make the fluid-controllable door have a balancing function, which solves the dilemma of the difficulty in opening the fluid-controllable door using axial sealing technology.

[0018] When the C-seal and the sealing position are in a fitted and 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 THE DRAWINGS

[0019] Figure 1A , Schematic diagram of fluid-controllable gate.

[0020] Figure 1B , Figure 1C , Figure 1D , fluid controllable door, the figure shows a schematic diagram of the C seal in different positions in the fluid controllable door.

[0021] Figure 2A , a simplified schematic diagram of the door group.

[0022] Figure 2B , a three-dimensional diagram of the door group. The figure blurs the connection diagram between the channels.

[0023] Figure 2C The door group is provided with a bracket, a sealing cover, a connecting channel, a screw rod and a nut. The schematic diagram of most structures of the door group is blurred in the figure.

[0024] Figure 3A , in the fluid medium system, the pusher in the door group stops pushing, the pusher is in place, and the four fluid-controllable doors are all in a closed state. Schematic diagram.

[0025] Figure 3B , in the fluid medium system, the pusher in the door group makes the a door and the d door in the open state, and the b door and the c door in the closed state.

[0026] Figure 3C , in the fluid medium system, the pusher in the door group makes the b door and c door in the open state, and the a door and d door in the closed state.

[0027] Components in the figure, 1-a door, 2-b door, 3-c door, 4-d door, 5-fluid controllable door, 6A-first chamber, 6B-second chamber, 7A-sealing channel, 7B-sealing position, 8A-A seal, 8B-B seal, 8C-C seal, 9A-first channel, 9B-second channel, 10A-sliding member, 10B-shaft, 10C-stopper, 11A-bracket, 11B-bracket bottom plate, 11C-sealing cover, 12-F port, 13-G port, 14-T port, 15-U port, 16-inlet, 17-discharge port, 18A-cover plate, 18B-shaft hole, 19-door group, 20-connecting pipe, 21-working cylinder, 22-piston, 23-pushing member, 24A-A lever group, 24B-B lever group, 25-elastic component, 26-check valve, 27-connecting channel, 28-screw, nut DETAILED DESCRIPTION

[0028] Figure 3A , Figure 3B , Figure 3C It shows that in the fluid medium system, the T port and U port on the door group can be connected to the working cylinder through a connecting pipe. The figure does not show the power supply, control circuit and devices for providing pressure fluid medium to the fluid control component.

[0029] 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: a door group 19, a connecting pipe 20, a working cylinder 21, a fluid medium, a pressurizing device, a power supply and an electric control, etc. The pusher 23 in the door group is an A lever group 24A and a B lever group 24B.

[0030] The door group 19 is composed of 4 fluid controllable doors, wherein the fluid controllable door 5 (see Figure 1C ) is composed of: a first chamber 6A, a second chamber 6B, a sealing channel 7A, an A seal 8A, a B seal 8B, a cover plate 18A, a first channel 9A, a second channel 9B, and a sliding member 10A composed of a shaft 10B and a C seal 8C, wherein the upper and lower cover plates are used to press the A seal and the B seal, and the shaft hole 18B on the cover plate is a channel for the shaft on the sliding member to pass through the cover plate. The sliding member can move back and forth along the direction of the axis. The back and forth movement of the sliding member can make the C seal and the sealing position fit together or separate from each other. When the C seal fits with the sealing position 7B, the fluid controllable door is in a closed state (see Figure 1A , Figure 1B ), when the C seal is separated from the sealing position, the fluid controllable door is in the open state (see Figure 1C , Figure 1D ). The four fluid controllable doors, namely door a 1, door b 2, door c 3, and door d 4, are combined together in the manner described to form a door group 19 (see Figure 2A , Figure 2B , Figure 2A , Figure 2B The C seal is a seal block). In the door group, the G port 13 on the a door is connected with the F port 12 on the c door and the T port 14 is left, and the G port 13 on the b door is connected with the F port 12 on the d door and the U port 15 is left. Both the T port and the U port can be led out through the connecting pipe 20 and connected with the relevant working cylinder 21 or other relevant equipment.

[0031] In a preferred embodiment, a section of the shaft starting from the C seal end and having a length approximately equal to the length of the second chamber has a trapezoidal longitudinal section shape. When the C seal and the sealing position are fitted with each other, the section of the shaft with a trapezoidal longitudinal section shape is located in the sealing path and the second chamber. Since the section shape of the section of the shaft close to the C seal is a trapezoid, the movement of the shaft causes the effective channel cross-sectional area between the shaft and the sealing position to change accordingly. According to the different functional requirements of the product, the shaft with a trapezoidal longitudinal section shape on the sliding member can be a large bottom of the trapezoid close to the C seal (see Figure 1A , the C seal in the figure is an air seal or an oil seal), or a trapezoidal small bottom close to the C seal (see Figure 1B , Figure 1B The C seal in the figure is a gasket).

[0032] In a preferred embodiment, the F port on door a of door group is connected with the F port on door b and an inlet 16 is left, and the G port on door c is connected with the G port on door d and an outlet 17 is left, so as to facilitate the connection between the door group and other equipment.

[0033] In a preferred embodiment, a one-way valve 26 is connected to each of the inlet 16 and the outlet 17, so 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 one-way valve through the inlet, and 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 one-way valve through the outlet (see Figure 3A ).

[0034] In a preferred embodiment, the A seal 8A, B seal 8B, and 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 to the A seal lip (see Figure 1A ), C seals can also be made of sealing pads, sealing blocks, etc. The so-called sealing pads are made of elastic materials such as rubber (see Figure 1B ), C seals made of harder materials than gaskets are called seal blocks, and seal blocks can also be integrally formed with the shaft (see Figure 2A , Figure 3A ).

[0035] In a preferred embodiment, a bracket 11A is connected to the outer ends of the second chambers of the a-door and d-doors and the outer ends of the first chambers of the b-door and c-doors. The bracket can enclose the cover plates on the second chambers of the a-door and d-doors and the shafts passing through the cover plates of the second chambers of the a-door and d-doors and the cover plates on the first chambers of the b-door and c-doors and the shafts passing through the cover plates of the first chambers of the b-door and c-doors (see FIG. Figure 2B , Figure 2C ). Furthermore, the bracket 11A is also connected to a bracket bottom plate 11B.

[0036] In a preferred embodiment, a sealing cover 11C is connected to the outer ends of the first chamber of the a door and the d door and the outer ends of the second chamber of the b door and the c door. The sealing cover can enclose the cover plate on the first chamber of the a door and the d door, the shaft passing through the cover plate of the first chamber of the a door and the d door, and the cover plate on the second chamber of the b door and the c door, and the shaft passing through the cover plate of the second chamber of the b door and the c door (see Figure 2B , Figure 2C ).

[0037] In a preferred embodiment, a stopper 10C and an elastic component 25 are respectively arranged on the shaft of the a door and the d door passing through the second chamber cover plate and the shaft of the b door and the c door passing through the first chamber cover plate. In this scheme, the elastic component 25 is a spring, the stopper is connected to the shaft in a cross direction, and the spring is sleeved on the shaft. The springs on the a door and the d door are located between the cover plate and the stopper, and the springs on the b door and the c door are located between the bracket bottom plate 11B and the stopper (see Figure 3A ).

[0038] In a preferred embodiment, a connecting passage 27 is provided in the door assembly to connect the space at one end of the bracket and the space at one end of the sealing cover. The connecting passage is located in an area that does not hinder the passage of each passage in the door assembly. The screw rod can pass through the connecting passage. The screw rod and nut 28 can assemble the upper cover plate and the lower cover plate of the door assembly with the door assembly. (See Figure 2C )

[0039] In a preferred embodiment, a pusher capable of pushing the shaft is provided at one end of the bracket of the door assembly, and the pusher 23 is composed of an A lever group 24A and a B lever group 24B.

[0040] Usually, the pusher is in the original position, which means that the pusher does not push the shaft, and the four C seals and the four sealing positions are in a mutually fitting state (see Figure 3A ), the A lever group can push the shafts of the door a and door d in the door group that pass through the shaft holes on the cover plate of the second chamber, so that the C seals on the door a and door d are gradually separated from the sealing position 7B (see Figure 3B ), when the A lever group stops pushing the shafts on the a and d doors and gradually retreats to make the pusher in its original position, the spring can make the C seal on the sliding parts of the a and d doors gradually return to the position that fits the sealing position (see Figure 3A ), the B lever group can push the shaft of the door b and door c in the door group that passes through the shaft hole on the cover plate of the first chamber, so that the C seal on the door b and door c is gradually separated from the sealing position (see Figure 3C ), when the B lever group stops pushing the shafts on the B and C doors and gradually retreats to make the pusher in its original position, the spring can make the C seal on the sliding parts of the B and C doors gradually return to the position that fits the sealing position (see Figure 3A ).

[0041] Describe the balancing function of a fluid-controlled gate

[0042] The door group is in operation

[0043] In the following description, the friction resistance between the A seal, the B seal and the shaft is not considered. In order to make the fluid controllable door achieve a balanced function, a scheme of using a total of three seals, namely, the A seal, the B seal and the C seal, on a sealing door structure is adopted. The so-called sealing door in the present invention is a combination of the C seal and the sealing position. When the fluid controllable door adopts three seals, the aperture of the sealing position closed by the C seal on the fluid controllable door is the same as the shaft diameter of the shaft clamped by the A seal and the B seal, according to the Pavel Kalman law (a simple description, in a closed container filled with fluid medium, the pressure is the same everywhere, and the pressure is proportional to the area), the axial thrust of the fluid medium on the two ends of the shaft tends to a balanced state, and the pusher pushes the sliding member to open the fluid controllable door only needs a pushing force greater than the spring elastic force. When the pusher stops pushing the sliding member and gradually retreats to its original position, the spring can make the C seal on the sliding member gradually return to a closed state that fits the sealing position. When the C-seal and the sealing position are in a fitted and closed state, there is no sliding between the C-seal and the sealing position, and no friction caused by sliding is generated. The main pressure they are subjected to is the pressure generated by the spring, so there is almost no wear on the C-seal and the sealing position.

[0044] If the diameter of the shaft of the B seal and the clamp is appropriately increased, the axial thrust of the fluid medium on the B seal end of the shaft will be greater than the axial thrust of the fluid medium on the A seal end of the shaft. In this state, the spring described in claim 8 is no longer needed. When the pusher stops pushing the shaft and gradually retreats to its original position, under the action of the pressurized fluid medium, the C seal can gradually return to a position that fits the sealing position.

[0045] According to the above principle, it is also possible to select suitable A seal, B seal and shaft diameter of the clamp, suitable aperture of the sealing position and C seal, and combine them with a spring of appropriate elastic force, so that the pusher can select a more appropriate driving force to complete the work of pushing the sliding member.

[0046] Describe the flow control function of a fluid controllable door

[0047] The door group is in operation

[0048] The degree to which the pusher pushes the shaft is different, and the distance the shaft moves is different, and the effective channel cross-sectional area between the shaft and the sealing position also changes (see Figure 1B , Figure 1C , Figure 1D), causing the flow rate of the fluid medium passing through the fluid controllable door in unit time to change, and the change in flow rate in unit time causes the speed of the piston 22 in the working cylinder 21 driven by the door group to change. If the difference between the diameter of the large bottom and the diameter of the small bottom is reduced, the cross-sectional area of ​​the effective channel on the fluid controllable door can be changed more accurately when the pusher pushes the shaft.

[0049] Describe the control process of the gate group controlling the flow direction of the fluid medium

[0050] The door group is in operation

[0051] In the door group, the pusher stops pushing the shaft and keeps the pusher in place, the four fluid-controllable doors are in a close-fitting state, the fluid medium in the door group stops flowing, and the piston 22 in the working cylinder 21 stays at the position where the fluid medium stops flowing. At this time, the door group is said to be in a locked position (see Figure 3A ).

[0052] Under the action of the pusher, when the b and c doors are both in a fitted closed state, and the a and d doors are both in a separated open state, due to the different degrees of pushing, the shaft moves different distances, and the effective channel cross-sectional area between the shaft and the sealing position on the a and d doors also changes accordingly. The fluid medium enters one end of the piston in the working cylinder from the one-way valve, the inlet, through the sealing channel 7A of the a door, the T port 14. Since the c door is in a fitted closed state, the fluid medium cannot be discharged through the G port of the c door. The fluid medium entering the working cylinder pushes the piston in the working cylinder to move toward the U port. The fluid medium at the other end of the piston is discharged through the open d door, the discharge port, and the one-way valve. At this time, the door group is said to be in the T position (see Figure 3B ), as long as the C seals on the a and d doors are separated from the sealing position, the door group is said to be in the T position.

[0053] Under the action of the pusher, when the a and d doors are in a fitted closed state, and the b and c doors are in a separated open state, due to the different degrees of pushing, the shaft moves different distances, and the effective channel cross-sectional area between the shaft and the sealing position on the b and c doors also changes accordingly. The fluid medium enters one end of the piston in the working cylinder from the one-way valve, the inlet, through the sealing channel 7A of the b door, the U port 15. Since the d door is in a fitted closed state, the fluid medium cannot be discharged through the G port of the d door. The fluid medium entering the working cylinder pushes the piston in the working cylinder to move toward the T port. The fluid medium at the other end of the piston is discharged through the separated and open c door, the discharge port, and the one-way valve. At this time, the door group is said to be in the U position (see Figure 3C ), as long as the C seals on the b and c doors are separated from the sealing position, the door group is said to be in the U position.

[0054] It can be seen that by pushing the axis in the gate group with different programs, the flow direction of the fluid medium in the fluid medium system when it flows through the gate group can be controlled. The degree of pushing the axis is different, and the flow rate through the gate group per unit time will change accordingly.

[0055] Since the pusher can change whether and how to push the shaft at any time according to needs, the flow state of the fluid medium in the door group can be changed to T position, lock position or U position at any time, and the moving direction, speed and distance of the piston in the working cylinder driven by the door group will also change accordingly.

[0056] The beneficial effects of the present invention are as follows: when the door group is in operation, the pusher can change the flow direction of the fluid medium by pushing the shaft in the door group with different procedures. The degree to which the pusher pushes the shaft is different, and the effective channel cross-sectional area between the shaft and the sealing position also changes accordingly, causing the flow rate per unit time to change, thereby playing the role of regulating the flow rate of the fluid medium. The fluid-controllable door in the door group has a balancing function, so that the opening of the fluid-controllable door only requires a small driving force. A one-way valve is provided at the outer end 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 automatically lock.

[0057] Products that use axial sealing technology have almost no wear between the seals and the sealing positions, thereby extending the service life of the door group. Products that use axial sealing technology have lower requirements for the cleanliness of the fluid medium, thereby reducing the operating cost of the door group. Products that use axial sealing technology have lower requirements for processing accuracy, simple product structure, and easy processing, thereby reducing the production cost of the door group.

[0058] Preface to the Examples

[0059] The embodiments of the door group included in the fluid medium system are specific embodiments based on examples illustrated under appropriate conditions. The pushers in the door group have various structural types. In this embodiment, only the A lever group and the B lever group are used as pushers. The related combinations of pushers of other structural forms in the door group and the door group that are not described in detail here should not be regarded as limitations of the door group of the present invention on the combination of pushers of other structural forms.

[0060] The embodiment is just a simple description of the operation of the door group. Since the pusher can change whether and how to push the shaft at any time according to the needs, the flow state of the fluid medium in the door group can be changed to T position, lock position or 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 situations will not be repeated in the embodiment.

[0061] Embodiment, the door group is in operation

[0062] (1) When the pusher makes doors a, b, c and d all close together, the fluid medium passage is closed and the door group is in the locked position (see Figure 3A ), as long as the pusher is in place, the four fluid-controllable doors are in a fitted closed state, and the door group is said to be in a locked position.

[0063] (2) When the pusher makes gates a and d both open and gates b and c closed, the fluid medium enters one end of the working cylinder from the one-way valve, the inlet, through gate a, and from port T. The piston in the working cylinder moves toward port U under the push of the fluid medium, and the fluid medium at the other end of the piston is discharged from the open gate d, through the discharge port, and the one-way valve. At this time, the door group is said to be in the T position (see Figure 3B ), as long as the C seals on the a and d doors are separated from the sealing position, the door group is said to be in the T position.

[0064] (3) When the pusher makes doors a, b, c and d all closed, the fluid medium passage is closed and the door group is locked again (see Figure 3A ).

[0065] (4) When the pusher makes gates b and c both open and gates a and d closed, the fluid medium enters one end of the working cylinder from the one-way valve, the inlet, through gate b, and from port U. The piston in the working cylinder moves toward port T under the push of the fluid medium. The fluid medium at the other end of the piston is discharged from the open gate c, through the discharge port, and the one-way valve. At this time, the door group is said to be in position U (see Figure 3C ), as long as the C seals on the b and c doors are separated from the sealing position, the door group is said to be in the U position.

[0066] (5) When the pusher makes doors a, b, c and d all closed again, the door group is in the locked position again (see Figure 3A ).

[0067] Usually, during the operation of the door group, there is a locking position before and after the T station, and there is also a locking position before and after the U station.

Claims

1. A door group consisting of fluid-controllable doors, comprising fluid-controllable doors, characterized in that: It includes four fluid-controllable doors, namely, door a, door b, door c and door d; the fluid-controllable doors include: a first chamber, a second chamber, a sealing channel, an A sealing member, a B sealing member, a first channel, a second channel, a cover plate and a sliding member; The sealing path is located between the first chamber and the second chamber, and the sealing position on the sealing path is close to the first chamber; the A seal is installed at one end of the first chamber away from the sealing path, and the B seal is installed at one end of the second chamber away from the sealing path. The lips of the A seal and the B seal are opposite to each other, and a cover plate with an axial hole is respectively provided at the outer end of the A seal and the outer end of the B seal; one end of the first channel is communicated with the first chamber, connected between the A seal and the sealing path, and the other end of the first channel is an F port, one end of the second channel is communicated with the second chamber, connected between the B seal and the sealing path, and the other end of the second channel is a G port, and the sliding member is composed of a shaft and a C seal located in the middle of the shaft, and the C seal on the shaft The sealing member is located in the first chamber, and the C sealing member matches the sealing position; the shaft at one end of the sliding member passes through the A sealing member matching the shaft and passes through the shaft hole on the cover plate of the first chamber, and the shaft at the other end of the sliding member passes through the sealing path, passes through the B sealing member matching the shaft and passes through the shaft hole on the cover plate of the second chamber; the a door, b door, c door and d door are combined together, the cover plates on the second chamber of the a door and d door and the cover plates on the first chamber of the b door and c door are connected together, the cover plates on the first chamber of the a door and d door and the cover plates on the second chamber of the b door and c door are connected together, the G port on the a door is connected with the F port on the c door and a T port is left, the G port on the b door is connected with the F port on the d door and a U port is left, and a door group is formed.

2. The door assembly composed of a fluid-controllable door according to claim 1, characterized in that: The shaft starts from the C seal end and has a length approximately equal to the length of the second chamber, and its longitudinal section shape is a trapezoid; when the C seal and the sealing position are fitted and closed with each other, the shaft section with a trapezoidal longitudinal section shape is located in the sealing path and the second chamber; the shaft with a trapezoidal longitudinal section shape on the sliding part can be a trapezoidal large bottom close to the C seal, or a trapezoidal small bottom close to the C seal.

3. The door assembly composed of fluid-controllable doors according to claim 1, characterized in that: The F port on the door of the door group a is connected with the F port on the door of the door group b and an inlet is left, and the G port on the door of the door group c is connected with the G port on the door of the door group d and an outlet is left.

4. The door assembly of a fluid-controllable door according to claim 3, characterized in that: A one-way valve is connected to the inlet, and a one-way valve is also connected to the outlet.

5. The door assembly composed of fluid-controllable doors according to claim 1, characterized in that: The A seal and the B seal are selected from one of an air seal and an oil seal; the C seal is selected from one of a sealing gasket, a sealing block, an air seal or an oil seal.

6. The door assembly composed of fluid-controllable doors according to claim 1, characterized in that: A bracket is connected to the outer ends of the second chambers of the a door and the d door and the outer ends of the first chambers of the b door and the c door.

7. The door assembly composed of fluid-controllable doors according to claim 1, characterized in that: A sealing cover is connected to the outer ends of the first chambers of the a-door and d-doors and the outer ends of the second chambers of the b-door and c-doors.

8. The door assembly composed of fluid-controllable doors according to claim 1, characterized in that: A stopper and an elastic component are respectively arranged on the shafts of the a and d doors passing through the shaft holes of the second chamber cover plate and on the shafts of the b and c doors passing through the shaft holes of the first chamber cover plate; the stopper is connected to the shaft in the cross direction, and the elastic component is sleeved on the shaft.

9. The door assembly composed of fluid-controllable doors according to claim 1, characterized in that: The door group is provided with a communication channel which can connect the space inside the bracket with the space inside the sealing cover.

10. The door assembly composed of fluid-controllable doors according to claim 1, characterized in that: A pushing member capable of pushing the shaft is arranged at one end of the bracket of the door group.

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