A connecting sealing structure of an automatic coupler gas circuit connector

Abstract

The present invention discloses a connecting sealing structure of an automatic coupler gas circuit connector. The automatic coupler gas circuit connector is composed of a gas circuit connecting mechanism and an opening and closing mechanism. The opening and closing mechanism is a normally closed, top-opening valve mechanism. The normally closed state is achieved by a spring compressing the valve, and the opening state is achieved by the front sliding rod of the gas circuit connecting mechanism pushing the valve when the coupler is engaged. The gas circuit connecting mechanism includes a convex end connecting structure with a push rod and a concave end connecting structure with a front sliding rod. The push rod and the radial sealing ring arranged in the concave end connecting structure are tightly combined with the surrounding wall of the push rod to achieve sealing. The end face of the concave end connecting structure and the outer end sealing ring arranged on the end face of the convex end connecting structure are pressed and contacted to achieve sealing. The gas circuit connector of the present invention is provided with two-stage sealing, the first stage is the sealing between the push rod body and the radial sealing ring, and the second stage is the sealing between the end cover and the outer end sealing ring. The air path of the gas circuit connector is large. The gas circuit connector adopts a mutually embracing and interconnecting structure to achieve indifferent matching connection, simple installation, and simplified operation.

Description

Technical Field

[0001] The invention belongs to the technical field of railway vehicle equipment design, in particular to the technical field of railway vehicle connection coupler design, and relates to an air circuit connector of an automatic coupler, specifically a communication sealing structure of the air circuit connector of the automatic coupler. Background Art

[0002] At present, automatic couplers are mainly close-connected couplers used in EMUs and subways, and the connection and separation of the air circuit connector interface are carried out synchronously with the coupling and uncoupling of the coupler.

[0003] Existing automatic couplers often do not have the tight connection characteristics of close-fitting couplers, and the sealing performance cannot meet the requirements. The requirements for the diameter of the air path on railway freight cars and ordinary passenger cars are relatively large, so the air path connector of the close-fitting coupler is not universal.

[0004] Chinese application CN104358953 discloses a close-fitting air duct connector for vehicle couplers, including valve port rubber, valve head, pressure spring, valve body, sealing pad, tappet, tappet spring, main air duct and unhooking pipe, the valve head has a cylinder extending toward the valve body, the cylinder is sleeved on the valve hole seat of the valve body and slides with the valve hole seat, a sealing ring is installed between the cylinder and the valve hole seat of the valve body, the pressure spring is sleeved outside the cylinder, one end of which is against the valve head and the other end is against the valve body, the rear part of the unhooking pipe is inserted into the unhooking pipe hole of the valve body and slides and seals, the unhooking pipe hole is equipped with an unhooking pipe spring, one end of the unhooking pipe spring is against the rear end of the unhooking pipe, and the other end is against the valve body wall at the bottom of the unhooking pipe hole. This application adopts conventional end seals, and the sealing performance cannot meet the requirements. Summary of the invention

[0005] The purpose of the present invention is to provide a connecting sealing structure of an automatic coupler gas circuit connector. The connector gas circuit flux of the present invention is large, and the dual-channel mutual coupling connecting mechanism can meet the connection of multiple types of automatic couplers, and the sealing performance is better, so as to realize the effective sealing connection of the coupler gas circuit.

[0006] The present invention is achieved through the following technical solutions:

[0007] A connecting sealing structure of an automatic coupler air circuit connector, the automatic coupler air circuit connector is composed of an air circuit connecting mechanism and an opening and closing mechanism, the opening and closing mechanism is a normally closed, top-opening valve mechanism, the normally closed state is achieved by a spring compressing the valve, and the opening state is achieved by the front sliding rod of the air circuit connecting mechanism pushing up the valve when the coupler is engaged; it is characterized in that: the air circuit connecting mechanism includes a convex end connecting structure with a push rod and a concave end connecting structure with a front sliding rod, the push rod and the radial sealing ring arranged in the concave end connecting structure are tightly combined with the peripheral wall of the push rod to achieve sealing, and the end face of the concave end connecting structure is pressed and contacted with the outer end sealing ring arranged on the combined end face of the convex end connecting structure to achieve sealing.

[0008] The present invention further adopts a dual-pathway mutual coupling connection mechanism, and its air path connection mechanism includes two sets of mutual coupling connection mechanisms with the same structure, both of which include a convex end connection structure and a concave end connection structure. When the couplers are connected, the top rod of the convex end connection structure of one air path connector is combined with the front sliding rod of the concave end connection structure of another air path connector, and the front sliding rod of the concave end connection structure of one air path connector is combined with the top rod of the convex end connection structure of another air path connector to achieve dual-pathway mutual coupling connection.

[0009] The rear end of the push rod of the convex end connecting structure is an annular spherical surface and cooperates with the annular spherical concave surface of the convex end base of the convex end connecting structure to realize the swing of the push rod.

[0010] A push rod reset mechanism is installed at the rear end of the push rod; the push rod reset mechanism includes several sets of radial floating springs and contacts arranged radially along the circumferential wall of the push rod and arranged at intervals on the convex end base. Each radial floating spring is arranged radially, the rear end is limited by bolts, and the front end supports the contact installed in the radial through hole, and the contact is supported and combined with the edge of the circumferential wall of the spherical sliding ring at the rear end of the push rod.

[0011] The front end of the convex end base is pressed by the convex end cover to tighten the outer end sealing ring to achieve an annular end sealing with the end face of the concave end connecting structure; the convex end cover presses the outer end sealing ring against the outer end face of the compression spring block, and the rear end face of the compression spring block has an annular compression spring pressed against the radial sliding sleeve wing edge of the step structure at the rear end of the push rod.

[0012] The radial sealing ring arranged in the concave end connecting structure is fixed on the end face of the front end seat by pressing the end cover, and the inner cavity side wall of the front end seat is provided with a through hole to communicate with the inner cavity of the convex end base of the convex end connecting structure; the inner side wall of the end cover entrance is provided with a guiding inclined surface for the push rod to enter.

[0013] A radial sealing ring is installed between the front end seat and the end cover of the present invention. When the push rod of the air path connector extends into the front end seat and contacts the front sliding rod, the sealing ring has been surrounded on the rod body of the push rod. When the push rod pushes the front sliding rod to open the air path, the air pressure acts on the radial sealing ring to press the sealing ring against the rod body of the push rod, thereby playing a self-sealing role of the air pressure.

[0014] The double-channel connection structure of the present invention has a guiding inclined surface on the end cover, which can guide the push rod to enter the front end seat when the gas path connector is docked.

[0015] The gas circuit connector of the present invention has the following advantages:

[0016] 1) After the two gas path connectors are butt-jointed, there are two levels of sealing with good sealing effect. The first level is the sealing between the push rod body and the radial sealing ring, and the second level is the sealing between the end cover and the outer end sealing ring.

[0017] 2) The air path connector has a large air diameter, and the dual-path design ensures that the overall diameter is not less than the diameter of the air main pipe of railway passenger cars and freight cars.

[0018] 3) The air circuit connector is installed on the vehicle in either single or double position, and adopts an interlocking structure, which can not only achieve good sealing but also solve the single and double structure matching problem of the plug-in connection structure, and realize indiscriminate matching connection when the railway vehicle coupler is connected, which is simple to install and operate.

[0019] 4) The reserved air circuit interface of the air circuit connector is set on the side, and the overall structure is short, which does not affect the compression stroke of the coupler. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of a gas circuit connector according to an embodiment of the present invention;

[0021] Figure 2 is a schematic structural diagram of two gas path connectors connected in an embodiment of the present invention;

[0022] Figure 3 It is a schematic diagram of the installation position of the gas circuit connector according to an embodiment of the present invention.

[0023] In the figure, 1 is the rear end seat, 2 is the rear end seat sliding sleeve, 3 is the rear slide rod, 4 is the base end face sealing ring, 5 is the return spring, 6 is the base, 7 is the front end seat end face sealing ring, 8 is the front slide rod, 9 is the front end seat, 10 is the front slide rod sliding sleeve, 11 is the radial sealing ring, 12 is the end cover, 13 is the convex end base, 14 is the compression spring, 15 is the push rod, 16 is the spherical sliding ring, 17 is the radial sliding sleeve, 18 is the outer end sealing ring, 19 is the compression spring stop, 20 is the convex end cover, 21 is the radial floating spring, 22 is the contact, 23 is the coupler, and 24 is the air circuit connector. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with specific implementation methods. The specific implementation methods are further descriptions of the principles of the present invention and do not limit the present invention in any way. Technologies that are the same or similar to the present invention do not exceed the scope of protection of the present invention.

[0025] Combined with the attached pictures.

[0026] The connecting sealing structure of the automatic coupler gas circuit connector in this example is set in the automatic coupler gas circuit connector of the dual-path mutual coupling connecting mechanism. As shown in the figure, the gas circuit connector is composed of a gas circuit connecting mechanism and an opening and closing mechanism. The opening and closing mechanism is a normally closed and top-opening valve mechanism, which is normally closed by a spring compressing the valve and opened by the front sliding rod of the gas circuit connecting mechanism pushing the valve open when the coupler is engaged;

[0027] The air path connecting mechanism is a dual-pathway mutually coupled connecting mechanism, including a convex end connecting structure with a push rod 15 and a concave end connecting structure with a front slide bar 8. When the couplers are engaged, the push rod 15 of the convex end connecting structure of one air path connector is combined with the front slide bar 8 of the concave end connecting structure of another air path connector, and the front slide bar 8 of the concave end connecting structure of one air path connector is combined with the push rod 15 of the convex end connecting structure of another air path connector to achieve dual-pathway mutually coupled connection; wherein, the push rod 15 of each path and the radial sealing ring 11 arranged in the concave end connecting structure are tightly combined with the peripheral wall of the push rod 15 to achieve sealing, and the end face of the concave end connecting structure of each path is pressed and contacted with the outer end sealing ring 18 arranged on the combined end face of the convex end connecting structure to achieve sealing.

[0028] The rear end of the male end connecting structure push rod 15 is a spherical surface and cooperates with the spherical concave surface of the male end base of the male end connecting structure to realize the swing of the push rod 15.

[0029] The opening and closing mechanism includes: an annular base 6, an opening and closing valve body arranged in the base 6, a reset spring 5 mounted on the opening and closing valve body, and an air path inlet arranged on the side wall of the base 6; the front end face of the opening and closing valve body is supported by the reset spring 5 and is connected to the annular base 6 by a front end seat 9 which is compressed and combined with the front end seat end face sealing ring 7 to realize normal closing. The front end face of the opening and closing valve body is also connected to the front slide bar 8 to drive and compress the reset spring 5 when the coupler is engaged, and separate the front end face of the opening and closing valve body from the end face of the front end seat 9 to realize the opening of the opening and closing mechanism.

[0030] A rear end seat 1 is arranged at the rear end of the annular base 6 of the opening and closing mechanism, and a sliding shaft is arranged at the center of the rear end seat 1. The rear slide rod 3 at the rear of the opening and closing valve body is a hollow structure, and the inner wall of the rear slide rod 3 can slide along the sliding shaft. The rear end of the rear slide rod 3 is a disc structure with a radial direction larger than the radial direction of the rear slide rod 3. A base end face sealing ring 4 is arranged on the contact surface between the disc structure and the bottom end of the base 6 to realize a normally closed seal at the rear end of the base 6.

[0031] A push rod reset mechanism is installed at the rear end of the push rod 15; the push rod reset mechanism includes several sets of radial floating springs 21 and contacts 22 arranged radially along the peripheral wall of the push rod 15 and arranged at intervals on the convex end base 13. Each radial floating spring 21 is arranged radially, the rear end is limited by bolts, and the front end supports the contact 22 installed in the radial through hole. The contact 22 is supported and combined with the edge of the circumferential wall of the spherical sliding ring 16 at the rear end of the push rod 15.

[0032] The front end of the convex end base 13 is pressed by the convex end cover 20 to tighten the outer end sealing ring 18 to achieve an annular end seal with the end face of the concave end connecting structure; the convex end cover 20 presses the outer end sealing ring 18 against the outer end face of the compression spring stop 19, and the rear end face of the compression spring stop 19 has an annular compression spring 14 that presses against the wing edge of the radial sliding sleeve 17 of the step structure at the rear end of the push rod 15.

[0033] The radial sealing ring 11 arranged in the concave end connecting structure is pressed and fixed on the end face of the front end seat 9 through the end cover 12. The inner cavity side wall of the front end seat 9 is provided with a through hole to communicate with the inner cavity of the convex end base of the convex end connecting structure; the inner side wall of the entrance of the end cover 12 is provided with a guiding inclined surface for the push rod to enter.

[0034] The front slide bar 8 is connected to the rear slide bar 3 in an annular sealing manner, and a vent hole is left in the middle of the connection to connect the inner cavity of the front slide bar 8 and the inner cavity of the rear slide bar 3.

[0035] The rod body of the front slide bar 8 is evenly provided with ventilation grooves in the radial direction; a front slide bar sleeve 10 is installed at the front part of the rod body of the front slide bar 8; and the front slide bar sleeve 10 is axially slidably matched in the inner hole of the front end seat 9.

[0036] The rear slide bar 3 and the central slide shaft of the rear end seat 1 are slidably matched through the rear end seat sleeve 2. The radial direction of the rear end seat sleeve 2 is provided with a ventilation groove to connect the inner cavity of the rear slide bar 3 with the inner cavity of the rear end seat 1.

[0037] like Figure 1 As shown, the air circuit connector 24 of the automatic coupler of this example includes: a rear end seat 1, a rear end seat sleeve 2, a rear slide rod 3, a base end face sealing ring 4, a return spring 5, a base 6, a front end seat end face sealing ring 7, a front slide rod 8, a front end seat 9, a front slide rod sleeve 10, a radial sealing ring 11, an end cover 12, a convex end base 13, a compression spring 14, a push rod 15, a spherical sliding ring 16, a radial sleeve 17, an outer end sealing ring 18, a compression spring stop 19, a convex end cover 20, a radial floating spring 21, a contact 22, etc.

[0038] A rear end seat sliding sleeve 2 is installed on the sliding shaft rod body of the rear end seat 1 and extends into the inner hole of the rear sliding rod 3 for axial sliding fit.

[0039] A ventilation groove is left in the radial direction of the rear end seat sliding sleeve 2.

[0040] An air duct interface is provided on the inner cavity side of the base 6, and the air duct of the vehicle is connected to the air path docking interface through the air duct interface. The base 6 is sealed and connected to the rear end seat 1 and the front end seat 9 respectively. The base end face sealing ring 4 is installed on the through hole at the rear end of the base 6. The inner cavity end face of the base 6 presses the front slide bar 8 onto the front end seat end face sealing ring 7 installed on the front end seat 9 through the reset spring 5, and the rear slide bar 3 also presses the base end face sealing ring 4 installed on the base 6. At this time, the inner cavity of the base 6 and the inner cavities of the rear end seat 1 and the front end seat 9 are all in a closed state, and the air path is disconnected.

[0041] The front slide bar 8 is sealedly connected to the rear slide bar 3, and a vent hole is left at the connection. The inner cavity of the rear seat 1 is connected to the inner cavity of the front seat 9. The rod body of the front slide bar 8 has a vent groove radially, and a front slide bar sleeve 10 is installed. The front slide bar 8 is axially slidably matched in the inner hole of the front seat 9 through the front slide bar sleeve 10.

[0042] A radial sealing ring 11 is installed on the end surface of the front end seat 9, and is pressed against the end surface of the front end seat 9 through the end cover 12. A through hole is left on the inner cavity side of the front end seat 9, which is sealed and connected with the air hole of the convex end base 13.

[0043] The inner hole edge of the end cover 12 is provided with a guide slope.

[0044] The convex end base 13 is sealed and connected with the convex end cover 20. The convex end cover 20 presses the outer end sealing ring 18 on the outer end of the compression spring retainer 19, and the compression spring retainer 19 presses the compression spring 14 on the radial sliding sleeve 17 wing edge.

[0045] A spherical surface is left in the hole of the convex end base 13, which is sealed with the spherical surface of the spherical sliding ring 16. The rear end surface of the push rod 15 is sealed with the end surface of the spherical sliding ring 16. The push rod 15 can slide along the spherical surface of the convex end base 13 through the spherical sliding ring 16.

[0046] The radial floating spring 21 and the contact 22 are evenly installed in the radial direction of the convex end base 13, and the floating spring 21 presses on the end surface of the contact 22. The contact 22 presses on the wing edge of the push rod 15, and the push rod 15 can float radially through the end surface of the spherical sliding ring 16 and the end surface of the radial sliding sleeve 17. The floating spring 21 and the contact 22 provide the push rod 15 with radial floating reset elastic force.

[0047] like Figure 2 As shown, after the two air path connectors 24 are connected, the push rod 15 pushes against the end face of the front slide bar 8 and compresses the reset spring 5 backwards, and the front slide bar 8 and the air enter the inner cavity of the front slide bar 8 and the inner cavity of the convex end base 13 through the gap between the base end face sealing ring 4, and then respectively lead to the inner cavity of the push rod 15 of the two air path connectors 24, and the air paths of the two air path connectors 24 are in a passage state. At the same time, the radial sealing ring 11 is tightly attached to the rod body of the push rod 15 due to the air pressure, which plays a primary sealing role, and the outer end sealing ring 18 is pressed against the end face of the front end cover to play a secondary sealing role. When the two air path connectors 24 are separated, the reset spring 5 presses the rear slide bar 3 and the front slide bar 8 against the base end face sealing ring 4 and the front end seat end face sealing ring 7 respectively, disconnecting the air path.

[0048] like Figure 3 As shown, the air circuit connector 24 of the present invention is installed at the middle position above the coupler 23.

[0049] Working principle:

[0050] When the couplers are connected, the air circuit connectors 24 respectively installed on the two couplers are butted against each other, the push rod 15 is inserted into the hole of the end cover 12 and then pushed against the end surface of the front slide bar 8, pushing the front slide bar 8 to move forward and backward, opening the seal between the base 6 and the front end seat 9, connecting the air circuit, and the air flows into the front end seat 9 through the base 6. The push rod 15 of one air circuit connector 24 and the radial sealing ring 11 of the other air circuit connector 24 are tightly combined and attached to the surface of the rod body of the push rod 15 to form a primary radial seal, and the end cover 12 of one air circuit connector 24 and the outer end sealing ring 18 of the other air circuit connector 24 are pressed and contacted to form a secondary end seal. One air path enters the inner hole of the push rod 15 through the inner hole of the front slide bar 8, and then flows to the inner cavity of the front end seat 9 of the other air circuit connector 24; the other air path flows into the inner cavity of the front end seat 9 of the other air circuit connector 24 through the inner hole of the convex end base 13 and the inner hole of the push rod 15. The two air paths merge in the inner cavity of the front end seat 9 and then flow into the inner cavity of the base 6 . The inner cavities of the base 6 of the two air path connectors 24 are interconnected to achieve air flow.

Claims

1. A connecting sealing structure of an automatic coupler gas circuit connector, the automatic coupler gas circuit connector is composed of a gas circuit connecting mechanism and an opening and closing mechanism, the opening and closing mechanism is a normally closed and top-opening valve mechanism, the normally closed valve is realized by a spring compressing the valve, and the opening is realized by the front sliding rod of the gas circuit connecting mechanism pushing the valve when the coupler is engaged; it is characterized by: The air path connecting mechanism includes a convex end connecting structure with a push rod and a concave end connecting structure with a front sliding rod. The push rod and the radial sealing ring arranged in the concave end connecting structure are tightly combined with the peripheral wall of the push rod to achieve sealing, and the end face of the concave end connecting structure is pressed and contacted with the outer end sealing ring arranged on the combined end face of the convex end connecting structure to achieve sealing; the air path connecting mechanism includes two sets of mutually coupled and identical structures, each including a convex end connecting structure and a concave end connecting structure. When the couplers are coupled, the push rod of the convex end connecting structure of one air path connector is combined with the front sliding rod of the concave end connecting structure of another air path connector, and the front sliding rod of the concave end connecting structure of one air path connector is combined with the push rod of the convex end connecting structure of another air path connector to achieve dual-path mutual coupling connection.

2. The connecting sealing structure of the automatic coupler gas circuit connector according to claim 1, characterized in that: The rear end of the push rod of the convex end connecting structure is an annular spherical surface and cooperates with the annular spherical concave surface of the convex end base of the convex end connecting structure to realize the swing of the push rod.

3. The connecting sealing structure of the automatic coupler gas circuit connector according to claim 2 is characterized in that: A push rod reset mechanism is installed at the rear end of the push rod; the push rod reset mechanism includes several sets of radial floating springs and contacts arranged radially along the circumferential wall of the push rod and arranged at intervals on the convex end base. Each radial floating spring is arranged radially, the rear end is limited by bolts, and the front end supports the contact installed in the radial through hole, and the contact is supported and combined with the edge of the circumferential wall of the spherical sliding ring at the rear end of the push rod.

4. The connecting sealing structure of the automatic coupler gas circuit connector according to claim 2, characterized in that: The front end of the convex end base is pressed by the convex end cover to tighten the outer end sealing ring to achieve an annular end sealing with the end face of the concave end connecting structure; the convex end cover presses the outer end sealing ring against the outer end face of the compression spring block, and the rear end face of the compression spring block has an annular compression spring pressed against the radial sliding sleeve wing edge of the step structure at the rear end of the push rod.

5. The connecting sealing structure of the automatic coupler gas circuit connector according to claim 4, characterized in that: The radial sealing ring arranged in the concave end connecting structure is fixed on the end surface of the front end seat by pressing the end cover, and the inner cavity side wall of the front end seat is provided with a through hole to communicate with the inner cavity of the convex end base of the convex end connecting structure; The inner side wall of the end cover entrance is provided with a guiding inclined surface for the ejector rod to enter.

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