Four-position three-way ball valve with air exhaust function for urban rail vehicle

Abstract

The invention discloses a four-position three-way ball valve with an air exhaust function for an urban rail vehicle. The four-position three-way ball valve comprises a valve body, a valve element and a valve rod. The valve body is provided with a valve cavity and a fluid channel communicated with the valve cavity. The valve core is arranged in the valve cavity; an arc-shaped exhaust groove is further formed in the outer surface of the valve element. When the valve element rotates to the first position, the exhaust groove does not communicate with the first fluid channel, the second fluid channel, the third fluid channel and the fourth fluid channel of the valve body. When the valve element rotates to the second position, the first fluid channel communicates with the fourth fluid channel through the exhaust groove. When the valve element rotates to a third position, the second fluid channel communicates with the fourth fluid channel through the exhaust groove; when the valve element rotates to a fourth position, the exhaust groove is only communicated with the third fluid channel; and one end of the valve rod is linked with the valve core. According to the four-position three-way ball valve, due to the fact that air supply and air exhaust of air paths of the two brake mechanisms can be achieved at the same time, the installation difficulty can be effectively lowered, the installation space is reduced, and pipeline connecting points can be fully reduced.

Description

Technical Field

[0001] The invention relates to the technical field of rail transit, and more specifically to a four-position three-way ball valve with exhaust for urban rail vehicles. Background Art

[0002] At present, when designing the braking system of urban rail vehicles, a bogie brake isolation ball valve plug is designed to cut off the brake air supply of the bogie corresponding to the brake fault when the brake is not relieved, and discharge the stored air in the brake pipeline corresponding to the bogie, so as to achieve the purpose of relieving the brake actuator. Two of these ball valves need to be set in each car, arranged under the car near the middle of the car, and the switch status of the ball valve is monitored through electrical contacts.

[0003] The existing arrangement scheme of the bogie brake isolation ball valve plug is shown in Figure 1 , the upstream pipeline is connected to two ball valves with electric contacts through a three-way joint. Each ball valve controls the air supply of the brake mechanism on each bogie. The on-off combination of the two ball valves forms four working states: Working state 1: When the brake system of the single-section vehicle works normally, the two ball valves are in the normal open position, the air inlet is connected to the output port 1 and the output port 2 at the same time, and the air in the pipeline is discharged from the air inlet to the two output ports at the same time; Working state 2: When the downstream of output port 1 needs to be cut off, operate ball valve 1 to shut it off. At this time, the air inlet is connected to output port 2, and output port 1 is connected to the exhaust port of ball valve 1. The air in the pipeline is discharged from the air inlet to output port 2, and the air downstream of output port 1 is discharged to the atmosphere through the exhaust port. Working state 3: Similarly, when the downstream of output port 2 needs to be cut off, operate ball valve 2 to close it. At this time, the air inlet is connected to output port 1, and output port 2 is connected to the exhaust port of ball valve 2. The air in the pipeline is output from the air inlet to output port 1, and the air downstream of output port 2 is discharged to the atmosphere through the exhaust port. Working state 4: When the downstream of output port 1 and output port 2 need to be cut off at the same time, operate ball valve 1 and ball valve 2 at the same time to shut them off. At this time, the air inlet is blocked, output port 1 is connected with the exhaust port of ball valve 1, and output port 2 is connected with the exhaust port of ball valve 2. The air at the air inlet in the pipeline is not discharged, and the air downstream of output port 1 and output port 2 is discharged into the atmosphere through the exhaust port.

[0004] The above-mentioned ball valve plug gate has one inlet and one outlet, cuts off exhaust, and has a relatively simple function; the conventional solution for the bogie brake isolation ball valve is composed of two energized electric shock conventional plug gates in parallel, which occupies a large space; this structure has many joints and pipe connection points, which are prone to leakage.

[0005] Therefore, there is a need for a bogie brake isolation ball valve plug for use in urban rail vehicles, which can overcome the shortcomings of the above-mentioned prior art. Summary of the invention

[0006] Based on this, and in view of the above-mentioned deficiencies in the prior art, a four-position three-way ball valve with exhaust for urban rail vehicles is provided.

[0007] Based on the above purpose, the following technical solutions are adopted: The present invention provides a four-position three-way ball valve with exhaust for urban rail vehicles, comprising: A valve body, wherein a valve cavity and a fluid channel communicating with the valve cavity are formed on the valve body, wherein the fluid channel comprises a first fluid channel, a second fluid channel, a third fluid channel and a fourth fluid channel; the first fluid channel, the second fluid channel, the third fluid channel and the fourth fluid channel are located on the same plane; the axes of the first fluid channel and the second fluid channel are arranged along a first direction, and the axes of the third fluid channel and the fourth fluid channel are arranged along a second direction; wherein the first direction is perpendicular to the second direction; A valve core, the valve core is arranged in the valve cavity, and a T-shaped connecting channel is arranged in the valve core; an arc-shaped exhaust groove is also opened along the outer surface of the valve core, and the exhaust groove is not connected with the T-shaped connecting channel; when the valve core rotates to the first position, the exhaust groove is not connected with the first fluid channel, the second fluid channel, the third fluid channel and the fourth fluid channel of the valve body; when the valve core rotates to the second position, the exhaust groove connects the first fluid channel with the fourth fluid channel; when the valve core rotates to the third position, the exhaust groove connects the second fluid channel with the fourth fluid channel; when the valve core rotates to the fourth position, the exhaust groove is only connected with the third fluid channel; and The valve stem has one end that is linked to the valve core, and the other end that passes through the valve body and is linked to the external driving mechanism.

[0008] In some embodiments, the diameters of the first fluid channel, the second fluid channel, and the third fluid channel are greater than the diameter of the fourth fluid channel.

[0009] In some embodiments, the connecting channel includes a first connecting channel, a second connecting channel and a third connecting channel, the first connecting channel, the second connecting channel and the third connecting channel are located on the same plane, the axes of the first connecting channel and the second connecting channel are respectively located on the same straight line, and the axis of the third connecting channel forms a predetermined angle with the axes of the first connecting channel and the second connecting channel.

[0010] In some embodiments, when the valve core rotates to the first position, the first connecting channel, the second connecting channel and the third connecting channel can be connected to the first fluid channel, the second fluid channel and the third fluid channel at the same time; when the valve core rotates to the second position, the first connecting channel and the third connecting channel can be connected to the second fluid channel and the third fluid channel at the same time; when the valve core rotates to the third position, the second connecting channel and the third connecting channel can be connected to the first fluid channel and the third fluid channel at the same time; when the valve core rotates to the fourth position, the first connecting channel, the second connecting channel and the third connecting channel can be connected to the first fluid channel, the second fluid channel and the fourth fluid channel at the same time.

[0011] In some embodiments, a cross-sectional width of the exhaust slot is greater than or equal to a diameter of the fourth fluid channel.

[0012] In some embodiments, the first fluid channel and the second fluid channel are output fluid channels, the third fluid channel is an input fluid channel, and the fourth fluid channel is an exhaust channel and is directly connected to the atmosphere.

[0013] In some embodiments, the first position of the valve core rotation is the initial position, and the limit direction is 0°; the second position of the valve core rotation is the position where the valve core is rotated 90° clockwise based on the first position; the third position of the valve core rotation is the position where the valve core is rotated 90° counterclockwise based on the first position; the fourth position of the valve core rotation is the position where the valve core is rotated 150° clockwise based on the first position.

[0014] In some embodiments, the external driving mechanism is a valve handle, and the valve stem is arranged at the axial position of the valve core of the four-position three-way ball valve; when the valve handle is rotated, the valve core can be driven to rotate synchronously; The four-position three-way ball valve also includes a limiting mechanism for providing tactile feedback when the valve core rotates to the first position, the second position, the third position and the fourth position; the limiting mechanism includes limiting grooves arranged on the valve body corresponding to the first position, the second position, the third position and the fourth position, and a receiving part arranged at the limiting grooves corresponding to the gate handle; a spring and a pin pressed on the spring are arranged in the groove; the receiving part is used to receive a pop-up pin; when the gate handle rotates to the first position, the second position, the third position or the fourth position, the pin is snapped into the receiving part of the gate handle.

[0015] In some embodiments, the four-position three-way ball valve is provided with a single-pole four-throw type electrical contact to monitor the position of the gate handle.

[0016] The present invention also provides a method for setting a bogie brake isolation ball valve plug for urban rail vehicles, wherein the upstream air supply pipeline of the bogie is connected to the four-position three-way ball valve as described above, and the four-position three-way ball valve is also connected to the air circuit of the brake mechanism on the bogie to control whether the air circuit of the brake mechanism on each bogie supplies air or exhausts air; When the valve core rotates to the first position, the third fluid channel is connected with the first fluid channel and the second fluid channel at the same time, and the air in the upstream air supply pipeline is input from the third fluid channel to the air path of the brake mechanism through the first fluid channel and the second fluid channel at the same time, so as to realize air supply to the air path of the brake mechanism; When the valve core rotates to the second position, the third fluid channel is connected with the second fluid channel, the first fluid channel is connected with the fourth fluid channel, and the air in the upstream air supply pipeline is inputted from the third fluid channel to the air path of the brake mechanism connected with the second fluid channel, so as to realize air supply to the air path of the brake mechanism connected with the second fluid channel; the air in the air path of the brake mechanism connected with the first fluid channel is discharged to the atmosphere through the fourth fluid channel, so as to realize air exhaust only to the air path of the brake mechanism connected with the first fluid channel; When the valve core rotates to the third position, the third fluid channel is connected with the first fluid channel, the second fluid channel is connected with the fourth fluid channel, and the air in the upstream air supply pipeline is input from the third fluid channel to the air path of the brake mechanism connected with the first fluid channel, so as to realize air supply to the air path of the brake mechanism connected with the first fluid channel; the air in the air path of the brake mechanism connected with the second fluid channel is discharged to the atmosphere through the fourth fluid channel, so as to realize air exhaust only to the air path of the brake mechanism connected with the second fluid channel; When the valve core rotates to the fourth position, the third fluid channel is blocked by the valve core and the air in the upstream air supply pipeline cannot be input into the air circuit of the brake mechanism through the ball valve, the first fluid channel is connected with the fourth fluid channel, the second fluid channel is connected with the fourth fluid channel, and the air in the air circuit of the brake mechanism connected with the first fluid channel and the second fluid channel is discharged to the atmosphere through the fourth fluid channel, so as to realize the simultaneous exhaust of the air circuit of the brake mechanism connected with the first fluid channel and the second fluid channel.

[0017] The present invention has the following beneficial technical effects: The four-position three-way ball valve with exhaust for urban rail vehicles of the present invention can effectively reduce the difficulty of installation, reduce the installation space, and fully reduce the number of pipeline connection points because it can simultaneously realize the air supply and exhaust of the air paths of two brake mechanisms.

[0018] Specifically, a single ball valve is used to realize the functions of two ball valves, thereby saving ball valve installation space; saving material costs of related pipes, joints, and connectors; and the ball valve functions are integrated, making it convenient for installers to install the ball valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings required for use in the embodiment will be briefly introduced below. Obviously, the drawings described below are only some implementation cases of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of a setting scheme of a bogie brake isolation ball valve plug in the prior art; Figure 2 It is a cross-sectional schematic diagram of a four-position three-way ball valve of the present invention; in, Figure 2 a is the valve body structure, Figure 2 b. Internal structure of valve core, Figure 2 c is the exhaust passage on the valve core surface; Figure 3 It is a cross-sectional schematic diagram of the valve core of the four-position three-way ball valve of the present invention rotating to the first position; wherein, Figure 3 a is the internal structure of the valve core, Figure 3 b is the exhaust passage on the valve core surface; Figure 4 It is a partial three-dimensional schematic diagram of the valve core of the four-position three-way ball valve of the present invention rotating to the first position; Figure 5 It is a cross-sectional schematic diagram of the valve core of the four-position three-way ball valve of the present invention rotating to the second position; wherein, Figure 5 a is the internal structure of the valve core, Figure 5 b is the exhaust passage on the valve core surface; Figure 6 It is a partial three-dimensional schematic diagram of the valve core of the four-position three-way ball valve of the present invention rotating to the second position; Figure 7 It is a cross-sectional schematic diagram of the valve core of the four-position three-way ball valve of the present invention rotating to the third position; wherein, Figure 7 a is the internal structure of the valve core, Figure 7 b is the exhaust passage on the valve core surface; Figure 8 It is a partial three-dimensional schematic diagram of the valve core of the four-position three-way ball valve of the present invention rotating to the third position; Fig. 9 It is a cross-sectional schematic diagram of the valve core of the four-position three-way ball valve of the present invention rotating to the fourth position; wherein, Fig. 9 a is the internal structure of the valve core, Fig. 9 b is the exhaust passage on the valve core surface; Fig.10 It is a partial three-dimensional schematic diagram of the valve core of the four-position three-way ball valve of the present invention rotating to the fourth position; Fig.11 It is a schematic diagram of the cut-off plug of the four-position three-way ball valve of the present invention; Fig.12 It is a schematic diagram of the limiting mechanism of the four-position three-way ball valve of the present invention; Fig.13 The invention discloses a single-pole four-throw switch electrical schematic diagram of a four-position three-way ball valve.

[0021] List of reference numerals: 1. Valve body; 101. First fluid channel; 102. Second fluid channel; 103. Third fluid channel; 104. Fourth fluid channel; 2. Valve core; 201. First connecting channel; 202. Second connecting channel; 203. Third connecting channel; 204. Exhaust slot; 3. Door handle; 4. Limiting mechanism; 401. Spring; 402. Pin. DETAILED DESCRIPTION

[0022] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0023] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0024] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0025] In addition, the words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0026] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0027] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0028] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0029] The present invention is based on a common four-position three-way ball valve plug. The valve body 1 has an air path interface with one inlet, two outlets and one exhaust port. The valve core 22 has a three-way structure passage inside the ball. The opening angle corresponds to one inlet and two outlets of the valve body 1. Two small-diameter passages are added on the surface of the ball for exhaust. The valve body 1 has a structure such as Figure 2 As shown in a, the exhaust passage on the surface of the valve core 22 is as follows Figure 2 c, the internal structure is as follows Figure 2 As shown in b.

[0030] Specifically, Figure 2 and 11 , which shows a schematic diagram of a four-position three-way ball valve with exhaust for urban rail vehicles. The four-position three-way ball valve comprises: a valve body 1, a valve core 2 and a valve stem.

[0031] The valve body 1 is provided with a valve cavity and a fluid channel communicating with the valve cavity, wherein the fluid channel includes a first fluid channel 101, a second fluid channel 102, a third fluid channel 103 and a fourth fluid channel 104; the first fluid channel 101, the second fluid channel 102, the third fluid channel 103 and the fourth fluid channel 104 are located on the same plane; the axes of the first fluid channel 101 and the second fluid channel 102 are arranged along the first direction, and the axes of the third fluid channel 103 and the fourth fluid channel are arranged along the second direction; wherein the first direction and the second direction form a predetermined angle. wherein the first fluid channel 101 and the second fluid channel 102 are output fluid channels, the third fluid channel 103 is an input fluid channel, and the fourth fluid channel 104 is an exhaust channel and is directly connected to the atmosphere. In this embodiment, the fluid is air.

[0032] In an embodiment of the present invention, the axes of the first fluid channel 101 and the second fluid channel 102 are arranged along the first direction, which may include the axes of the first fluid channel 101 and the second fluid channel 102 being parallel or located on the same straight line. The axes of the third fluid channel 103 and the fourth fluid channel are arranged along the second direction, which may include the axes of the third fluid channel 103 and the fourth fluid channel being parallel or located on the same straight line.

[0033] The valve core 22 is installed in the valve cavity, and a T-shaped connecting channel is provided in the valve core 22; an arc-shaped exhaust groove 204 is also provided along the outer surface of the valve core 22. The exhaust groove 204 is not connected to the T-shaped connecting channel, and the exhaust groove 204 is only grooved on the surface of the ball valve core 22, such as Figure 4 As shown, the end of the exhaust groove 204 is at a certain distance from the port of the connecting channel. The two exhaust grooves 204 are arc-shaped on the surface of the ball valve core 22 and have a certain angle, which can be in the range of 60 degrees to 100 degrees. Figure 2-10 In the example shown, the angle is about 90 degrees. The connecting channel includes a first connecting channel 201, a second connecting channel 202 and a third connecting channel 203, the first connecting channel 201, the second connecting channel 202 and the third connecting channel 203 are located on the same plane, the axes of the first connecting channel 201 and the second connecting channel 202 are located on the same straight line, and the axis of the third connecting channel 203 forms a predetermined angle with the axes of the first connecting channel 201 and the second connecting channel 202. The predetermined angle can be in the range of 45 degrees to 90 degrees.

[0034] One end of the valve stem is linked to the valve core 22, and the other end passes through the valve body 1 and is linked to the external driving mechanism. The external driving mechanism is a valve stem handle 3, and the valve stem is arranged at the axial position of the valve core 22 of the four-position three-way ball valve; when the valve stem handle 3 is turned, the valve core 22 can be driven to rotate synchronously. This means that inside the cut-off valve, the valve core 22 (i.e., the key component for controlling the passage of fluid) is installed in a position that can rotate around the axial direction. This shaft is usually a metal rod, which allows the valve core 22 to rotate inside the valve, thereby opening or closing the fluid channel. The valve stem handle 3 is an external device used by the operator to control the opening and closing of the valve. It is directly connected to the rotating shaft of the valve core 22, so that when the operator turns the handle, the valve core 22 can be driven to rotate together. When the operator manually turns the valve stem handle 3, since the handle is connected to the rotating shaft of the valve core 22, this physical connection enables the valve core 22 to rotate with the rotation of the handle, thereby achieving control of the flow of the fluid.

[0035] Preferably, the diameters of the first fluid channel 101 , the second fluid channel 102 , and the third fluid channel 103 are greater than the diameter of the fourth fluid channel 104 .

[0036] The ball valve has a total of 4 working positions: Figure 3-Figure 4 The first position shown, Figure 3 a is the internal structure of the valve core, Figure 3 b is the exhaust passage on the surface of the valve core: the first position of the valve core 22 when it rotates is the initial position, and the limit direction is 0°.

[0037] When the valve core 22 rotates to the first position, the exhaust groove 204 is not connected with the first fluid channel 101 , the second fluid channel 102 , the third fluid channel 103 and the fourth fluid channel 104 of the valve body 1 .

[0038] When the valve core 22 rotates to the first position, the first connecting channel 201 , the second connecting channel 202 and the third connecting channel 203 can be connected to the first fluid channel 101 , the second fluid channel 102 and the third fluid channel 103 at the same time.

[0039] Figure 5-Figure 6 The second position shown, Figure 5 a is the internal structure of the valve core, Figure 5 b is the exhaust passage on the surface of the valve core: the second position of the valve core 22 is the position where the valve core 22 is rotated 90° clockwise based on the first position.

[0040] When the valve core 22 rotates to the second position, the exhaust slot 204 connects the first fluid channel 101 and the fourth fluid channel 104. When the valve core 22 rotates to the second position, the first connecting channel 201 and the third connecting channel 203 can be connected to the second fluid channel 102 and the third fluid channel 103 at the same time.

[0041] Figure 7-Figure 8 The third position shown, Figure 7 a is the internal structure of the valve core, Figure 7 b is the exhaust passage on the valve core surface: the third position of the valve core 22 is the position where the valve core 22 is rotated 90° counterclockwise based on the first position.

[0042] When the valve core 22 rotates to the third position, the exhaust slot 204 connects the second fluid channel 102 and the fourth fluid channel 104. When the valve core 22 rotates to the third position, the second connecting channel 202 and the third connecting channel 203 can be connected to the first fluid channel 101 and the third fluid channel 103 at the same time.

[0043] Figure 9-10 The fourth position shown, Fig. 9 a is the internal structure of the valve core, Fig. 9 b is the exhaust port on the valve core surface: the fourth position of the valve core 22 is the position where the valve core 22 rotates 150° clockwise based on the first position.

[0044] When the valve core 22 rotates to the fourth position, the exhaust slot 204 is only connected to the third fluid channel 103. When the valve core 22 rotates to the fourth position, the first connecting channel 201, the second connecting channel 202 and the third connecting channel 203 can be connected to the first fluid channel 101, the second fluid channel 102 and the fourth fluid channel 104 at the same time. The cross-sectional width of the exhaust slot 204 is greater than or equal to the diameter of the fourth fluid channel 104. The cross-sectional area of ​​the exhaust slot 204 is preferably the same as the area of ​​the exhaust port.

[0045] Fig.12 The limiting mechanism 4 of the four-position three-way ball valve is shown, which is used to provide hand-feel feedback when the valve core 22 rotates to the first position, the second position, the third position and the fourth position, so as to facilitate the operation of personnel. The limiting mechanism 4 includes limiting grooves arranged on the valve body 1 corresponding to the first position, the second position, the third position and the fourth position, and a receiving part arranged at the corresponding limiting groove of the plug door handle 3; a spring 401 and a pin 402 pressed on the spring 401 are arranged in the groove; the receiving part is used to receive the popped-up pin 402; when the plug door handle 3 rotates to the first position, the second position, the third position or the fourth position, the pin 402 is clamped into the receiving part of the plug door handle 3.

[0046] The four-position three-way ball valve is provided with a single-pole four-throw type electrical contact to monitor the position of the plug door handle 3 ( Fig.13The electrical schematic diagram of a single-pole, four-throw switch for a four-position, three-way ball valve is shown. Working position 1 corresponds to the first position, working position 2 corresponds to the second position, working position 3 corresponds to the third position, and working position 4 corresponds to the fourth position). In order to monitor the state of the shutoff valve in real time (such as whether it is open, closed, or in a specific position), an electrical monitoring method is adopted. This method usually involves using electrical contacts to detect the position of the valve. This is a specific electrical contact configuration method, where "single-pole" means that there is only one active contact, and "four-throw" means that this contact can be switched between four different positions. This configuration allows the monitoring system to accurately identify the specific position of the valve handle 3. This is a description of the purpose of the electrical contact monitoring scheme. By monitoring the state changes of the electrical contacts, the system can know which position the valve handle 3 is currently located, thereby determining the working state of the valve.

[0047] In the method for setting the brake isolation ball valve plug for a bogie used in an urban rail vehicle of an embodiment of the present invention, the upstream air supply pipeline of the bogie is connected to the four-position three-way ball valve as described above, and the four-position three-way ball valve is also connected to the air circuit of the brake mechanism on the bogie to control whether the air circuit of the brake mechanism on each bogie is to supply air or exhaust air. The four-position three-way ball valve can be set Figure 1 The three-way valve is shown in position and replaces two prior art ball valves.

[0048] When the valve core 22 rotates to the first position, the third fluid channel 103 is connected with the first fluid channel 101 and the second fluid channel 102 at the same time, and the air in the upstream air supply pipeline is input from the third fluid channel 103 to the air path of the brake mechanism through the first fluid channel 101 and the second fluid channel 102 at the same time, so as to realize air supply to the air path of the brake mechanism; When the valve core 22 rotates to the second position, the third fluid channel 103 is connected with the second fluid channel 102, the first fluid channel 101 is connected with the fourth fluid channel 104, and the air in the upstream air supply pipeline is input from the third fluid channel 103 to the air path of the brake mechanism connected with the second fluid channel 102, so as to realize air supply to the air path of the brake mechanism connected with the second fluid channel 102; the air in the air path of the brake mechanism connected with the first fluid channel 101 is discharged to the atmosphere through the fourth fluid channel 104, so as to realize exhaust only for the air path of the brake mechanism connected with the first fluid channel 101; When the valve core 22 rotates to the third position, the third fluid channel 103 is connected with the first fluid channel 101, the second fluid channel 102 is connected with the fourth fluid channel 104, and the air in the upstream air supply pipeline is input from the third fluid channel 103 to the air path of the brake mechanism connected with the first fluid channel 101, so as to realize air supply to the air path of the brake mechanism connected with the first fluid channel 101; the air in the air path of the brake mechanism connected with the second fluid channel 102 is discharged to the atmosphere through the fourth fluid channel 104, so as to realize exhaust only for the air path of the brake mechanism connected with the second fluid channel 102; When the valve core 22 rotates to the fourth position, the third fluid channel 103 is blocked by the valve core 22 and the air in the upstream air supply pipeline cannot be input into the air circuit of the brake mechanism through the ball valve, the first fluid channel 101 is connected with the fourth fluid channel 104, the second fluid channel 102 is connected with the fourth fluid channel 104, and the air in the air circuit of the brake mechanism connected with the first fluid channel 101 and the second fluid channel 102 is discharged to the atmosphere through the fourth fluid channel 104, so as to realize the simultaneous exhaust of the air circuit of the brake mechanism connected with the first fluid channel 101 and the second fluid channel 102.

[0049] The four-position three-way ball valve with exhaust of the present invention is a solution that integrates the two ball valves in the original solution, has practical application value, can be used to guide production, and does not make quantitative requirements on the specific size and position of the equipment solution in the technical solution. Therefore, solutions with similar structural forms and similar design principles can be regarded as alternative solutions of the present invention.

[0050] The above is an exemplary embodiment disclosed by the present invention, but it should be noted that, without departing from the scope disclosed by the embodiments of the present invention as defined in the claims, various changes and modifications may be made. In addition, although the elements disclosed by the embodiments of the present invention may be described or required in individual form, they may also be understood as multiple unless explicitly limited to the singular.

[0051] It should be understood that, as used herein, the singular forms "a", "an" are intended to include the plural forms as well, unless the context clearly supports an exception. It should also be understood that, as used herein, "and / or" refers to any and all possible combinations including one or more of the associated listed items.

[0052] The serial numbers of the embodiments disclosed in the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0053] A person skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the disclosure of the embodiments of the present invention (including the claims) is limited to these examples; under the concept of the embodiments of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and there are many other changes in different aspects of the embodiments of the present invention as described above, which are not provided in detail for the sake of simplicity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.

Claims

1. A four-position three-way ball valve with exhaust for urban rail vehicles, characterized in that: include: A valve body, wherein the valve body is provided with a valve cavity and a fluid channel communicating with the valve cavity, wherein the fluid channel comprises a first fluid channel, a second fluid channel, a third fluid channel and a fourth fluid channel; The first fluid channel, the second fluid channel, the third fluid channel and the fourth fluid channel are located on the same plane; the axes of the first fluid channel and the second fluid channel are arranged along the first direction, and the axes of the third fluid channel and the fourth fluid channel are arranged along the second direction; wherein the first direction is perpendicular to the second direction; A valve core, the valve core is arranged in the valve cavity, and a T-shaped connecting channel is arranged in the valve core; an arc-shaped exhaust groove is also opened along the outer surface of the valve core, and the exhaust groove is not connected with the T-shaped connecting channel; when the valve core rotates to the first position, the exhaust groove is not connected with the first fluid channel, the second fluid channel, the third fluid channel and the fourth fluid channel of the valve body; when the valve core rotates to the second position, the exhaust groove connects the first fluid channel with the fourth fluid channel; when the valve core rotates to the third position, the exhaust groove connects the second fluid channel with the fourth fluid channel; when the valve core rotates to the fourth position, the exhaust groove is only connected with the third fluid channel; and The valve stem has one end that is linked to the valve core, and the other end that passes through the valve body and is linked to the external driving mechanism.

2. The four-position three-way ball valve according to claim 1, characterized in that: The diameters of the first fluid channel, the second fluid channel, and the third fluid channel are greater than the diameter of the fourth fluid channel.

3. The four-position three-way ball valve according to claim 1, characterized in that: The connecting channel includes a first connecting channel, a second connecting channel and a third connecting channel. The first connecting channel, the second connecting channel and the third connecting channel are located on the same plane. The axes of the first connecting channel and the second connecting channel are located on the same straight line. The axis of the third connecting channel forms a predetermined angle with the axes of the first connecting channel and the second connecting channel.

4. The four-position three-way ball valve according to claim 3, characterized in that: When the valve core rotates to the first position, the first connecting channel, the second connecting channel and the third connecting channel can be connected to the first fluid channel, the second fluid channel and the third fluid channel at the same time; when the valve core rotates to the second position, the first connecting channel and the third connecting channel can be connected to the second fluid channel and the third fluid channel at the same time; when the valve core rotates to the third position, the second connecting channel and the third connecting channel can be connected to the first fluid channel and the third fluid channel at the same time; when the valve core rotates to the fourth position, the first connecting channel, the second connecting channel and the third connecting channel can be connected to the first fluid channel, the second fluid channel and the fourth fluid channel at the same time.

5. The four-position three-way ball valve according to claim 1, characterized in that: The cross-sectional width of the exhaust slot is greater than or equal to the diameter of the fourth fluid channel.

6. The four-position three-way ball valve according to claim 4, characterized in that: The first fluid channel and the second fluid channel are output fluid channels, the third fluid channel is an input fluid channel, and the fourth fluid channel is an exhaust channel and is directly connected to the atmosphere.

7. The four-position three-way ball valve according to claim 6, characterized in that: The first position of the valve core rotation is the initial position, and the limit direction is 0°; the second position of the valve core rotation is the position where the valve core rotates 90° clockwise based on the first position; The third position of the valve core rotation is a position where the valve core is rotated 90° counterclockwise based on the first position; The fourth position of the valve core rotation is a position where the valve core is rotated 150° clockwise based on the first position.

8. The four-position three-way ball valve according to claim 7, characterized in that: The external driving mechanism is a plug door handle, and the valve stem is arranged at the axial position of the valve core of the four-position three-way ball valve; when the plug door handle is rotated, the valve core can be driven to rotate synchronously; The four-position three-way ball valve also includes a limiting mechanism for providing tactile feedback when the valve core rotates to the first position, the second position, the third position and the fourth position; the limiting mechanism includes limiting grooves arranged on the valve body corresponding to the first position, the second position, the third position and the fourth position, and a receiving part arranged at the limiting grooves corresponding to the gate handle; a spring and a pin pressed on the spring are arranged in the groove; the receiving part is used to receive a pop-up pin; when the gate handle rotates to the first position, the second position, the third position or the fourth position, the pin is snapped into the receiving part of the gate handle.

9. The four-position three-way ball valve according to claim 7, characterized in that: The four-position three-way ball valve is provided with a single-pole four-throw type electrical contact to monitor the position of the plug door handle.

10. A method for setting a bogie brake isolation ball valve plug for urban rail vehicles, characterized in that: The upstream air supply pipeline of the bogie is connected to the four-position three-way ball valve as claimed in any one of claims 1 to 9, and the four-position three-way ball valve is also connected to the air circuit of the brake mechanism on the bogie to control whether the air circuit of the brake mechanism on each bogie supplies air or exhausts air; When the valve core rotates to the first position, the third fluid channel is connected with the first fluid channel and the second fluid channel at the same time, and the air in the upstream air supply pipeline is input from the third fluid channel to the air path of the brake mechanism through the first fluid channel and the second fluid channel at the same time, so as to realize air supply to the air path of the brake mechanism; When the valve core rotates to the second position, the third fluid channel is connected with the second fluid channel, the first fluid channel is connected with the fourth fluid channel, and the air in the upstream air supply pipeline is inputted from the third fluid channel to the air path of the brake mechanism connected with the second fluid channel, so as to realize air supply to the air path of the brake mechanism connected with the second fluid channel; the air in the air path of the brake mechanism connected with the first fluid channel is discharged to the atmosphere through the fourth fluid channel, so as to realize air exhaust only to the air path of the brake mechanism connected with the first fluid channel; When the valve core rotates to the third position, the third fluid channel is connected with the first fluid channel, the second fluid channel is connected with the fourth fluid channel, and the air in the upstream air supply pipeline is input from the third fluid channel to the air path of the brake mechanism connected with the first fluid channel, so as to realize air supply to the air path of the brake mechanism connected with the first fluid channel; the air in the air path of the brake mechanism connected with the second fluid channel is discharged to the atmosphere through the fourth fluid channel, so as to realize air exhaust only to the air path of the brake mechanism connected with the second fluid channel; When the valve core rotates to the fourth position, the third fluid channel is blocked by the valve core and the air in the upstream air supply pipeline cannot be input into the air circuit of the brake mechanism through the ball valve, the first fluid channel is connected with the fourth fluid channel, the second fluid channel is connected with the fourth fluid channel, and the air in the air circuit of the brake mechanism connected with the first fluid channel and the second fluid channel is discharged to the atmosphere through the fourth fluid channel, so as to realize the simultaneous exhaust of the air circuit of the brake mechanism connected with the first fluid channel and the second fluid channel.

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