Empty and loaded car pressure regulating valve and method of operation

Abstract

The application discloses an empty and heavy vehicle pressure adjusting valve and a working method, solves the problem of complex pipeline setting of the pressure adjusting valve in the prior art, has the beneficial effects of simplifying the pipeline and reducing the failure rate, and specifically has the following technical scheme: an empty and heavy vehicle pressure adjusting valve comprises a first shell and a second shell, an intermediate body is arranged between the first shell and the second shell, a first pressure regulating assembly is arranged in the second shell, a first cavity is arranged in the pressure regulating assembly, a second cavity is arranged on the upper side of the first pressure regulating assembly, a third cavity is arranged between the second shell and the intermediate body, a second pressure regulating assembly is arranged between the intermediate body and the first shell, the lower side of the second cavity is communicated with a control valve, the upper side of the second cavity is communicated with a fourth cavity of a pressure adjusting valve, the bottom side of the first shell is communicated with a fifth cavity of the pressure adjusting valve, the upper side of the second cavity is further communicated with a sixth cavity, the sixth cavity is communicated with a brake cylinder, and the first pressure regulating assembly can move towards the second cavity to cut off the passage between the second cavity and the brake cylinder.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of train technology, and in particular to an empty and loaded car pressure adjusting valve and working method. BACKGROUND

[0002] The statements in this section merely provide background information related to the present application and do not necessarily constitute the prior art.

[0003] The empty and loaded car automatic adjusting device can automatically adjust the pressure of the brake cylinder within a certain range according to the change of the vehicle load, thereby effectively improving the braking performance of the vehicle and greatly reducing the change range of the braking rate of the vehicle under different load conditions from empty car to loaded car. The empty and loaded car adjusting device can reduce the longitudinal impact between vehicles during braking of the mixed train; avoid insufficient braking force of the loaded car or excessive braking force of the empty car, thereby reducing the wheel rubbing failure, reducing the wheel wear and reducing the vehicle maintenance workload.

[0004] The existing empty and loaded car adjusting device is of a split design structure, and the suppression disc and the touch rod in the weight measuring mechanism are exposed outside, and the touch rod and the bushing are in transition fit. Since the vehicle operating environment is relatively harsh, especially the dust and debris raised during the turnover operation, it is extremely likely to enter the suppression disc touch rod and the bushing. The clamping force of the suppression disc cannot be overcome by the elastic force of the return spring, so that the suppression disc is stuck, resulting in failure of the empty car to switch to the loaded car.

[0005] The inventor found that the existing empty and loaded car adjusting device has the following problems: the structure is not reasonable, resulting in a high failure rate; the empty and loaded car adjusting device adopts a split design structure, which occupies a large space in the vehicle body layout, and the required connecting pipeline is complex, which is not conducive to the development of railway cars. SUMMARY

[0006] In view of the deficiencies of the prior art, the purpose of the present application is to provide an empty and loaded car pressure adjusting valve, a new type of pressure adjusting valve with simple principle, compact structure and reliable performance, which solves the problems of complex structure and high failure rate of the prior art.

[0007] In order to achieve the above-mentioned purpose, the present application is realized by the following technical scheme:

[0008] The air heavy car pressure adjusting valve comprises a first shell and a second shell, an intermediate body is arranged between the first shell and the second shell, a first pressure regulating assembly is arranged in the second shell, a first cavity is arranged in the pressure regulating assembly, a second cavity is arranged on the upper side of the first pressure regulating assembly, a third cavity is arranged between the second shell and the intermediate body, a second pressure regulating assembly is arranged between the intermediate body and the first shell, the lower side of the second cavity is communicated with a control valve, the control valve is connected with an air cylinder, the upper side of the second cavity is communicated with a fourth cavity of the pressure adjusting valve, the bottom side of the first shell is communicated with a fifth cavity of the pressure adjusting valve, the upper side of the second cavity is also communicated with a sixth cavity, the sixth cavity is formed between the second shell and a third shell, the sixth cavity is communicated with a brake cylinder, the first pressure regulating assembly can move towards the second cavity to cut off the passage between the second cavity and the brake cylinder, the upper side of the sixth cavity is a seventh cavity, a third pressure regulating assembly is arranged between the sixth cavity and the seventh cavity, the third pressure regulating assembly is connected with a fourth pressure regulating assembly, the fourth pressure regulating assembly passes through the third shell to contact an adjusting pad plate, the adjusting pad plate is installed on a bogie, the third pressure regulating assembly can be opened to realize the opening of the sixth cavity and the seventh cavity, one side of the seventh cavity is communicated with the lower side of the second pressure regulating assembly.

[0009] The air heavy car pressure adjusting valve comprises a first shell and a second shell, an intermediate body is arranged between the first shell and the second shell, a first pressure regulating assembly is arranged in the second shell, a first cavity is arranged in the pressure regulating assembly, a second cavity is arranged on the upper side of the first pressure regulating assembly, a third cavity is arranged between the second shell and the intermediate body, a second pressure regulating assembly is arranged between the intermediate body and the first shell, the lower side of the second cavity is communicated with a control valve, the control valve is connected with an air cylinder, the upper side of the second cavity is communicated with a fourth cavity of the pressure adjusting valve, the bottom side of the first shell is communicated with a fifth cavity of the pressure adjusting valve, the upper side of the second cavity is also communicated with a sixth cavity, the sixth cavity is formed between the second shell and a third shell, the sixth cavity is communicated with a brake cylinder, the first pressure regulating assembly can move towards the second cavity to cut off the passage between the second cavity and the brake cylinder, the upper side of the sixth cavity is a seventh cavity, a third pressure regulating assembly is arranged between the sixth cavity and the seventh cavity, the third pressure regulating assembly is connected with a fourth pressure regulating assembly, the fourth pressure regulating assembly passes through the third shell to contact an adjusting pad plate, the adjusting pad plate is installed on a bogie, the third pressure regulating assembly can be opened to realize the opening of the sixth cavity and the seventh cavity, one side of the seventh cavity is communicated with the lower side of the second pressure regulating assembly.

[0010] The air heavy car pressure adjusting valve comprises a first shell and a second shell, an intermediate body is arranged between the first shell and the second shell, a first pressure regulating assembly is arranged in the second shell, a first cavity is arranged in the pressure regulating assembly, a second cavity is arranged on the upper side of the first pressure regulating assembly, a third cavity is arranged between the second shell and the intermediate body, a second pressure regulating assembly is arranged between the intermediate body and the first shell, the lower side of the second cavity is communicated with a control valve, the control valve is connected with an air cylinder, the upper side of the second cavity is communicated with a fourth cavity of the pressure adjusting valve, the bottom side of the first shell is communicated with a fifth cavity of the pressure adjusting valve, the upper side of the second cavity is also communicated with a sixth cavity, the sixth cavity is formed between the second shell and a third shell, the sixth cavity is communicated with a brake cylinder, the first pressure regulating assembly can move towards the second cavity to cut off the passage between the second cavity and the brake cylinder, the upper side of the sixth cavity is a seventh cavity, a third pressure regulating assembly is arranged between the sixth cavity and the seventh cavity, the third pressure regulating assembly is connected with a fourth pressure regulating assembly, the fourth pressure regulating assembly passes through the third shell to contact an adjusting pad plate, the adjusting pad plate is installed on a bogie, the third pressure regulating assembly can be opened to realize the opening of the sixth cavity and the seventh cavity, one side of the seventh cavity is communicated with the lower side of the second pressure regulating assembly.

[0011] The air heavy car pressure adjusting valve comprises a first shell and a second shell, an intermediate body is arranged between the first shell and the second shell, a first pressure regulating assembly is arranged in the second shell, a first cavity is arranged in the pressure regulating assembly, a second cavity is arranged on the upper side of the first pressure regulating assembly, a third cavity is arranged between the second shell and the intermediate body, a second pressure regulating assembly is arranged between the intermediate body and the first shell, the lower side of the second cavity is communicated with a control valve, the control valve is connected with an air cylinder, the upper side of the second cavity is communicated with a fourth cavity of the pressure adjusting valve, the bottom side of the first shell is communicated with a fifth cavity of the pressure adjusting valve, the upper side of the second cavity is also communicated with a sixth cavity, the sixth cavity is formed between the second shell and a third shell, the sixth cavity is communicated with a brake cylinder, the first pressure regulating assembly can move towards the second cavity to cut off the passage between the second cavity and the brake cylinder, the upper side of the sixth cavity is a seventh cavity, a third pressure regulating assembly is arranged between the sixth cavity and the seventh cavity, the third pressure regulating assembly is connected with a fourth pressure regulating assembly, the fourth pressure regulating assembly passes through the third shell to contact an adjusting pad plate, the adjusting pad plate is installed on a bogie, the third pressure regulating assembly can be opened to realize the opening of the sixth cavity and the seventh cavity, one side of the seventh cavity is communicated with the lower side of the second pressure regulating assembly.

[0012] The air heavy car pressure adjusting valve comprises a first shell and a second shell, an intermediate body is arranged between the first shell and the second shell, a first pressure regulating assembly is arranged in the second shell, a first cavity is arranged in the pressure regulating assembly, a second cavity is arranged on the upper side of the first pressure regulating assembly, a third cavity is arranged between the second shell and the intermediate body, a second pressure regulating assembly is arranged between the intermediate body and the first shell, the lower side of the second cavity is communicated with a control valve, the control valve is connected with an air cylinder, the upper side of the second cavity is communicated with a fourth cavity of the pressure adjusting valve, the bottom side of the first shell is communicated with a fifth cavity of the pressure adjusting valve, the upper side of the second cavity is also communicated with a sixth cavity, the sixth cavity is formed between the second shell and a third shell, the sixth cavity is communicated with a brake cylinder, the first pressure regulating assembly can move towards the second cavity to cut off the passage between the second cavity and the brake cylinder, the upper side of the sixth cavity is a seventh cavity, a third pressure regulating assembly is arranged between the sixth cavity and the seventh cavity, the third pressure regulating assembly is connected with a fourth pressure regulating assembly, the fourth pressure regulating assembly passes through the third shell to contact an adjusting pad plate, the adjusting pad plate is installed on a bogie, the third pressure regulating assembly can be opened to realize the opening of the sixth cavity and the seventh cavity, one side of the seventh cavity is communicated with the lower side of the second pressure regulating assembly.

[0013] The second pressure regulating assembly comprises a support plate, a diaphragm is arranged on the periphery of the support plate, the outer side of the diaphragm is fixed between the intermediate body and the first shell, a ninth cavity is formed between the upper side of the support plate and the second shell, and a tenth cavity is formed between the lower side of the support plate and the first shell, and the tenth cavity is in communication with the seventh cavity and the fifth cavity respectively.

[0014] The third pressure regulating assembly comprises a valve push rod, a second valve body is arranged in the sixth cavity, a valve elastic body is arranged in the annular direction of the second valve body, the valve push rod is hollow, the top side of the valve push rod is arranged in a reduced diameter, the top side of the valve push rod is in contact with the upper surface of the second valve body, one side of the bent piece is located above the hollow part of the valve push rod, and a distance is arranged between the top side of the bent piece and the top side of the valve push rod, so that pressure air can enter the hollow part of the valve push rod through the space between the two, and press the second valve body downward, and the outer diameter of the second valve body is greater than the inner diameter of the hollow part of the top side of the valve push rod.

[0015] The fourth pressure regulating assembly comprises a valve rod, the valve rod is connected with the second valve body, the valve rod passes through the bent piece and is connected with a first touch rod, the first touch rod passes through the top side of the third shell and is arranged, the first touch rod is movable relative to the second shell, the first touch rod is connected with a second touch rod through an adjusting nut, an end block is arranged at the top of the seventh cavity, a pressure regulating elastic body is arranged in the seventh cavity through the top side of the end block and the valve push rod, a restoring elastic body is arranged in the seventh cavity through the top side of the end block and the bent piece, the restoring elastic body is located on the inner side of the pressure regulating elastic body, and the second touch rod is arranged in a blow-off channel in communication with the seventh cavity.

[0016] The pressure regulating valve comprises a pressure regulating valve shell, the pressure regulating valve shell is connected with the first shell, a display push rod is arranged in the pressure regulating valve shell, the display push rod is connected with a display card through the pressure regulating valve shell, a display elastic body is arranged between the display push rod and the pressure regulating valve shell, and the bottom side of the display card is hinged to the pressure regulating valve shell.

[0017] In a second aspect, the application further provides a working method of the air-heavy vehicle pressure regulating valve, and the method comprises the following contents.

[0018] The pressure air in the air cylinder enters the second cavity through the control valve;

[0019] The pressure air enters the first cavity through the first pressure regulating assembly, and the pressure air is divided into three passages after passing through the second cavity: one passage leads to the brake cylinder, one passage leads to the third cavity and the fourth cavity, and one passage leads to the sixth cavity;

[0020] Under the action of pressure air, the third pressure regulating assembly pushes the fourth pressure regulating assembly to move upward until the fourth pressure regulating assembly contacts with the adjusting pad plate, at this time, the third pressure regulating assembly is opened, and the pressure air in the brake cylinder also enters the sixth cavity, and the pressure air enters the lower side of the second pressure regulating assembly from the sixth cavity and the seventh cavity;

[0021] The air pressure on the lower side of the second pressure regulating assembly gradually rises, and the air pressure in the third cavity gradually rises, and after rising to the set values respectively, the first pressure regulating assembly is pushed to move upward, and the passage between the second cavity and the brake cylinder is cut off.

[0022] The working method of the air-heavy vehicle pressure regulating valve as described above further includes the following contents:

[0023] When the load of the vehicle increases, the spring deflection of the bogie is greater than H, the limiting valve descends with the bogie, and the position of the adjusting pad plate does not change, the stroke between the fourth pressure regulating assembly and the adjusting pad plate increases, the pressure of the pressure elastic body increases, and when the pressure reaches the balance, the pressure air entering the lower side of the second pressure regulating assembly from the seventh cavity will decrease, the passage between the second cavity and the brake cylinder gradually increases, and the pressure of the brake cylinder gradually increases with the increase of the load of the vehicle.

[0024] In the second aspect, the application further provides a working method of an air-heavy vehicle pressure regulating valve, which further includes the following contents:

[0025] When the heavy vehicle position, due to the increase of the spring deflection of the bogie, when the distance between the fourth pressure regulating assembly and the supporting pad plate exceeds the stroke of the fourth pressure regulating assembly, the fourth pressure regulating assembly always cannot contact the supporting pad plate, the second pressure regulating assembly always moves upward, the passage of the sixth cavity and the seventh cavity is closed, and the air cylinder only charges the brake cylinder through the control valve and the second cavity;

[0026] When the driver implements the air charging relief, the control valve acts, the brake hole thereof is switched to communicate with the atmosphere, the second cavity communicates with the atmosphere, the pressure air of the brake cylinder and the sixth cavity pushes the first valve body to move downward, the first cavity communicates with the control valve, the pressure air is led to the atmosphere, and the vehicle is relieved.

[0027] The beneficial effects of the application are as follows:

[0028] 1) The first shell, the second shell and the intermediate body are used to realize the integration of the air-heavy vehicle pressure regulating valve, the integrated structure design is adopted, the structure is compact, the working principle is relatively simple, the pressure regulating valve is arranged on the bottom side of the first shell, the pipeline connection is reduced, the leakage risk is reduced, and the problems of the large space occupied by the body arrangement and the complex connection pipeline required by the split design in the prior art are solved.

[0029] 2) the present application through the reasonable arrangement of the plurality of cavities, can be in the vehicle empty, heavy load when the brake pressure adjustment, cancel the suppression disc, spring, touch rod and other exposed components design in the pressure regulating valve, form a closed structure, avoid the influence of dust, sundries, improve the pressure adjustment performance, solve the problem of high failure rate of prior art.

[0030] 3) the present application in the seventh cavity side eighth cavity, eighth cavity for pressure reducing cavity, improve the overall pressure adjustment performance.

[0031] 4) the present application in the pressure regulating valve structure is reasonable, pressure regulating valve is provided with the fourth cavity and the fifth cavity, the fourth cavity is communicated with the brake cylinder, the fifth cavity is communicated with the eighth cavity through the tenth cavity, in the relief state, display push rod does not act, in the braking state, with the increase of vehicle load, the pressure of eighth cavity drops and brake cylinder pressure rises, so change the position of display push rod to realize the change of display signboard turning angle, facilitate the staff to intuitively observe the brake condition.

[0032] 5) the present application in the fourth pressure regulating assembly is provided with adjusting nut, the distance between the two touch rods is adjusted through the adjusting nut, so as to realize the distance between the touch rod and the adjusting pad. BRIEF DESCRIPTION OF DRAWINGS

[0033] The drawings accompanying the specification of the present application form a part of the present application, the illustrative embodiments of the present application and the description thereof serve to explain the present application, and do not constitute an improper limitation on the present application.

[0034] Figure 1 is a schematic diagram of an empty and heavy vehicle pressure regulating valve according to one or more embodiments of the present application Figure One .

[0035] Figure 2 is a schematic diagram of an empty and heavy vehicle pressure regulating valve according to one or more embodiments of the present application Figure Two .

[0036] In the figure: the mutual distance or size is exaggerated for showing the position of each part, and the schematic diagram is only illustrative.

[0037] Wherein: 1, pressure regulating valve, 2, adjusting pad, 105, valve push rod, 106, valve elastic body, 107, valve body, 108, elastic body, 109, first valve body, 110, pressure regulating piston, 111, state display board, 112, push pressure regulating push rod, 113, display push rod, 114, display elastic body, 115, diaphragm, 116, intermediate body, 117, first touch rod, 118, recovery elastic body, 119, pressure regulating elastic body, 120, adjusting nut, 121, second touch rod, 122, coupling elastic body, 202, eighth cavity, 203, fifth hidden way, 204, second hidden way, 205, first hidden way, 206, third hidden way, 207, fourth hidden way, 208, air release channel, 301, sixth cavity, 302, seventh cavity, 303, second cavity, 304, third cavity, 305, fourth cavity, 306, fifth cavity, 307, first cavity, 308, fourth pressure regulating assembly, 501, air cylinder, 502 control valve, 503, brake cylinder. DETAILED DESCRIPTION

[0038] It should be noted that the following detailed description is exemplary in nature and is intended to provide further description of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0039] It is to be understood that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the terms "comprises," "comprising," "includes," "including," and the like can be used herein. Similarly, the terms "comprises", "comprising", "includes", "including" and the like can be used herein. Unless otherwise specified, the terms "comprises", "comprising", "includes", "including" and the like can be used herein.

[0040] As introduced in the background, the prior art air heavy vehicle pressure regulating valve structure is complex, in order to solve the above technical problems, the present application provides an air heavy vehicle pressure regulating valve.

[0041] In a typical embodiment of the present application, reference is made to Figure 1 , Figure 2As shown, the empty and heavy vehicle pressure adjusting valve comprises a first shell and a second shell, an intermediate body is arranged between the first shell and the second shell, a first pressure regulating assembly is arranged in the second shell, a first cavity 307 is arranged in the pressure regulating assembly, a second cavity 303 is arranged on the upper side of the first pressure regulating assembly, a third cavity 304 is arranged between the second shell and the intermediate body, a second pressure regulating assembly is arranged between the intermediate body and the first shell, the lower side of the second cavity 303 is communicated with a control valve 502, the upper side of the second cavity is communicated with a fourth cavity 305 of the pressure adjusting valve 1, the bottom side of the first shell is communicated with a fifth cavity 306, the upper side of the second cavity 303 is also communicated with a sixth cavity 301, the sixth cavity is formed between the second shell and a third shell, the sixth cavity 301 is communicated with a brake cylinder 503, the first pressure regulating assembly can move towards the second cavity to cut off the passage between the second cavity 303 and the brake cylinder 503, the upper side of the sixth cavity 301 is a seventh cavity 302, a third pressure regulating assembly is arranged between the sixth cavity 301 and the seventh cavity 302, the third pressure regulating assembly is connected with a fourth pressure regulating assembly, the fourth pressure regulating assembly can contact an adjusting pad 2 through the third shell, the adjusting pad 2 is installed on a bogie, the third pressure regulating assembly can be opened to realize the opening of the sixth cavity 301 and the seventh cavity 302, one side of the seventh cavity 302 is provided with an eighth cavity 202, the eighth cavity 202 is communicated with the lower side of the second pressure regulating assembly.

[0042] The first pressure regulating assembly comprises a pressure regulating piston 110, the pressure regulating piston 110 is provided with the first cavity 307, a first valve body 109 is arranged at the opening of the first cavity 307, a coupling elastic body 122 is arranged in the first cavity 307, the coupling elastic body 122 is arranged between the first valve body 109 and the pressure regulating piston 110, one end of the coupling elastic body 122 is connected with the first valve body 109, the other end of the coupling elastic body 122 is connected with the first cavity 307, the second cavity 303 is located at the upper end of the first valve body 109, and the opening and closing of the first cavity 307 can be controlled by adjusting the position change of the first valve body 109.

[0043] Specifically, a first support part is arranged on the circumferential side of the first valve body 109, a first limiting part in the form of an annular ring is arranged on the top side of the pressure regulating piston, the first support part is specifically an annular support plate, and the second limiting part is specifically an annular limiting plate; under the arrangement of the coupling elastic body 122, the first limiting part limits the first support part so that the first valve body 109 is in contact with the pressure regulating piston 110, a convex part is arranged on the side of the first valve body 109 facing the coupling elastic body 122, and the side of the coupling elastic body 122 is sleeved in the annular direction of the convex part.

[0044] Moreover, a recess is arranged inside the first cavity 307 to accommodate the other side of the coupling elastic body 122.

[0045] Need to explain, the second cavity cross-section is inverted T type, the second cavity includes first section and second section, the first section is horizontal section, the second section is vertical upward section, the first section of the week side protrudes upward, the height of the first section protruding is less than the height of the second section, the first valve body is provided with a groove on the week side to support the first section of the second cavity 303 upward protruding elastic body 108.

[0046] The second section is provided with a downward protruding part near the first valve body, which is a protruding ring. The protruding part can contact the first valve body. When the protruding part contacts the upper surface of the first valve body, the channel between the first section and the second section of the second cavity is closed.

[0047] Among them, the first section of the second cavity is communicated with the control valve 502 through the fourth hidden way 207, and the control valve 502 is connected with the air cylinder 501.

[0048] It is easy to understand that the second section of the second cavity 303 is communicated with the third cavity 304 and the fourth cavity 305 through the first hidden way 205. The third cavity 304 is located below the pressure regulating piston 110, and the diameter of the third cavity 304 is greater than the diameter of the pressure regulating piston 110.

[0049] Among them, the fourth cavity 305 is located below the third cavity 304, and the display elastic body 114 is arranged between the fourth cavity 305 and the fifth cavity 306. One end of the display elastic body 114 is connected with the state display card 111 beyond the rear of the first shell. The display elastic body 114 is annularly arranged with the display push rod 113. The fourth cavity 305 changes the display state of the state display card 111 by adjusting the position of the fifth cavity 306.

[0050] Need to explain, the second pressure regulating assembly includes a support plate, the membrane plate 115 is arranged on the week side of the support plate, the outer side of the membrane plate 115 is fixed between the intermediate body 116 and the first shell, the ninth cavity is formed between the upper side of the support plate and the second shell, the tenth cavity is formed between the lower side of the support plate and the first shell, the tenth cavity is communicated with the seventh cavity and the fifth cavity respectively, the push pressure regulating push rod 112 is connected between the support plate and the pressure regulating piston 110 on the upper side, the push pressure regulating push rod 112 is arranged through the support plate, the tenth cavity on the upper side of the fifth cavity 306 is communicated, the tenth cavity is communicated with the eighth cavity 202 through the third hidden way, the eighth cavity 202 is a pressure reducing cavity, the eighth cavity 202 is located on one side of the seventh cavity 302, and the top side of the eighth cavity is communicated with the seventh cavity 302 through the sixth hidden way 201.

[0051] The second section of the second cavity 303 is communicated with the sixth cavity 301 through the second dark channel 204, the sixth cavity 301 is located on the upper side of the second cavity 303, the second dark channel 204 shares a section with the first dark channel 205, the top side of the second dark channel 204 is provided with the fifth dark channel 203, the fifth dark channel 203 is communicated with the sixth cavity 301, and the fifth dark channel 203 is also communicated with the brake cylinder 503.

[0052] Reference Figure 1 As shown, the top side of the second shell is provided with the sixth cavity 301 and the seventh cavity 302, the seventh cavity 302 is located on the upper side of the sixth cavity 301, the valve push rod 105 is arranged between the sixth cavity 301 and the seventh cavity 302, the third pressure regulating assembly includes the second valve body 107 arranged in the sixth cavity 301, and the valve elastic body 106 is arranged around the second valve body 107; the bottom side of the valve push rod 105 can cooperate with the second shell, when the air pressure inside the seventh cavity 302 is greater than the air pressure inside the sixth cavity, the valve push rod 105 is pushed to move downward and cooperates with the second shell to close the communication position of the fifth channel 203 and the sixth cavity 301.

[0053] The end block is arranged at the top of the seventh cavity, the pressure regulating elastic body 119 is arranged in the seventh cavity through the top side of the end block and the valve push rod 105, the recovery elastic body 118 is arranged in the seventh cavity through the top side of the end block and the bending piece, the recovery elastic body 118 is located on the inner side of the pressure regulating elastic body 119, the valve rod is connected with the second valve body 107, the valve rod passes through the bending piece and is connected with the first touch rod 117, the first touch rod 117 passes through the top side of the third shell and is arranged, the first touch rod 117 is movable relative to the second shell, the first touch rod 117 is connected with the second touch rod 121 through the adjusting nut 120, and the distance between the first touch rod 117 and the second touch rod 121 can be adjusted by rotating the adjusting nut 120, the air release channel 208 is arranged in the inner side of the first touch rod 117 and the second touch rod 121, the air release channel 208 in the inner side of the first touch rod is communicated with the seventh cavity 302, and the outer side of the air release channel is communicated with air.

[0054] In addition, a gap is arranged between the top end of the second touch rod and the adjusting pad 2.

[0055] Reference Figure 1 and Figure 2As shown, the gap between the second contact lever 121 and the adjusting pad 2 is H when the vehicle is empty. When the driver implements the pressure reduction brake, the pressure air in the air cylinder 501 enters the second cavity 303 through the control valve 502 and the fourth dark channel 207. At this time, the passage between the first cavity 307 and the second cavity 303 is open, and the pressure air in the air cylinder also enters the first cavity 303. After passing through the second cavity 303, the pressure air is divided into three passages, one of which passes through the second dark channel 204 and the fifth dark channel 203 to the brake cylinder 503, one of which passes through the first dark channel 205 to the third cavity 304 and the fourth cavity 305, and the other passes through the fifth dark channel 203 to the sixth cavity 301. Under the action of the pressure air, the second valve body 107 pushes the valve push rod 105 to move upward, and then pushes the valve rod, the first contact lever and the second contact lever to move upward, until the second contact lever 121 contacts the adjusting pad 2, the second valve body 107 stops moving. Under the action of the pressure air, the valve push rod 105 continues to move upward. At this time, the sixth cavity 301 communicates with the seventh cavity 302, the pressure air enters the eighth cavity 202, and the eighth cavity 202 pressure air enters the lower side of the diaphragm plate 115 through the third dark channel 206. When the air pressure of the eighth cavity 202 and the lower side of the diaphragm plate 115 rises to a set value, it acts together with the third cavity 304 to push the pressure regulating push rod 112, the pressure regulating piston 110 and the first valve body 109 to move upward, so that the passage between the second cavity 303 and the brake cylinder 503 is closed. At this time, the air cylinder 501 no longer supplies air to the brake cylinder 503. When the brake cylinder 503 and the eighth cavity 202 are pressure balanced, the restoring elastic body 118 and the pressure regulating elastic body 119 jointly push the valve push rod 105 to move downward, closing the passage between the sixth cavity 301 and the seventh cavity 302, and the pressure of the eighth cavity 202 stops rising, and the pressure of the brake cylinder 503 no longer changes.

[0056] When the load of the vehicle increases, the spring deflection of the bogie is greater than H, the limiting valve descends with the bogie bolster, and the position of the adjusting pad 2 on the side frame does not change. Therefore, the distance between the second contact lever 121 and the adjusting pad 2 increases, and the pressure of the pressure regulating elastic body 119 also increases at this time. When the pressure is balanced, the pressure air entering the eighth cavity 202 will decrease, and the pressure of the brake cylinder 503 will gradually increase with the increase of the load of the vehicle.

[0057] When the vehicle is heavy, the second contact lever 121 cannot contact the supporting pad 2 when the distance between the second contact lever 121 and the supporting pad 2 exceeds the stroke of the first contact lever and the second contact lever due to the increase of the spring deflection of the bogie. The second valve body 107 always pushes the valve push rod 105 to move upward, the passage between the sixth cavity 301 and the seventh cavity 302 is closed, the pressure of the eighth cavity 202 is 0, the air cylinder 501 only supplies air to the brake cylinder 503 through the second dark channel 204, the first valve body 109 is closed, and the pressure of the brake cylinder 503 does not change.

[0058] When the driver implements the inflation relief, the control valve 502 is actuated, and its brake hole is switched to the atmosphere, the second cavity 307 is communicated with the atmosphere through the fourth dark channel 207, the brake cylinder 503 and the sixth cavity 301 push the first valve body 109 to move downward under the pressure of the air, so that the first cavity 307 is communicated with the fourth dark channel 207, and the pressure air is communicated with the atmosphere, and the vehicle is relieved. The valve push rod 105 drives the second touch rod 121 to descend under the action of the pressure air in the eighth cavity 202, and the pressure air in the eighth cavity 202 is discharged to the atmosphere through the seventh cavity 302 through the air release channel 208.

[0059] The fifth cavity 306 is always communicated with the eighth cavity 202, and the fourth cavity 305 is communicated with the brake cylinder 503. In the relief state, since the pressures of the brake cylinder 503 and the eighth cavity 202 are the same as the atmosphere, the display push rod 113 is retracted in the pressure adjusting valve housing under the action of the display elastic body 114, and the indicator 111 is turned down.

[0060] In the brake state, when the vehicle is empty, the pressures on the left and right sides of the display push rod 113 are equal, the display push rod 113 does not act, and the indicator 111 is turned down. With the increase of the load of the vehicle, the pressure of the eighth cavity 202 decreases and the pressure of the brake cylinder 503 increases, the pressure on the right side of the display push rod 113 exceeds the pressure on the left side, the display push rod 113 is pushed out by a set distance, the display elastic body is compressed, the pressure is increased, the display push rod 113 is balanced on the left and right sides, and the display indicator 111 is turned up by a certain angle. The greater the load of the vehicle, the greater the angle of the indicator 111, until the indicator 111 is turned up by 90 degrees in the heavy vehicle position. Thus, in the pressure range of the brake cylinder from the empty vehicle to the heavy vehicle, the indicator 111 is turned up continuously within 0-90 degrees.

[0061] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An empty-full pressure regulating valve characterized by, The application relates to a pressure regulating device for a brake system of a railway vehicle, which comprises a first shell and a second shell, an intermediate body is arranged between the first shell and the second shell, a first pressure regulating assembly is arranged in the second shell, a first cavity is arranged in the first pressure regulating assembly, a second cavity is arranged on the upper side of the first pressure regulating assembly, the first pressure regulating assembly comprises a pressure regulating piston, a coupling elastic body is arranged in the first cavity, the coupling elastic body supports a first valve body, an elastic body is arranged between the top side of the pressure regulating piston and the second cavity, a first supporting part is arranged on the peripheral side of the first valve body, a first limiting part is arranged on the top side of the pressure regulating piston, the first limiting part limits the first supporting part under the action of the coupling elastic body, so that the first pressure regulating assembly is closed, a third cavity is arranged between the second shell and the intermediate body, a second pressure regulating assembly is arranged between the intermediate body and the first shell, the lower side of the second cavity is communicated with a control valve, the control valve is connected with an air cylinder, the upper side of the second cavity is communicated with a fourth cavity of a pressure adjusting valve, the bottom side of the first shell is communicated with a fifth cavity of the pressure adjusting valve, the upper side of the second cavity is also communicated with a sixth cavity, the sixth cavity is formed between the second shell and a third shell, the sixth cavity is communicated with a brake cylinder, the first pressure regulating assembly can move towards the second cavity to cut off the passage between the second cavity and the brake cylinder, the upper side of the sixth cavity is a seventh cavity, a third pressure regulating assembly is arranged between the sixth cavity and the seventh cavity, the third pressure regulating assembly comprises a valve push rod, a second valve body is arranged in the sixth cavity, the second valve body is annularly provided with a valve elastic body, the valve push rod is hollow, the top side of the valve push rod is in contact with the upper surface of the second valve body, one side of a bending piece is located above the hollow part of the valve push rod, the third pressure regulating assembly is connected with a fourth pressure regulating assembly, the fourth pressure regulating assembly comprises a valve rod, the valve rod is connected with the second valve body, the valve rod passes through the bending piece and is connected with a first touch rod, the first touch rod is connected with a second touch rod through an adjusting nut, the second touch rod is provided with a blow-off channel communicated with the seventh cavity, the fourth pressure regulating assembly can be in contact with an adjusting pad plate through the third shell, the adjusting pad plate is installed on a bogie, the third pressure regulating assembly can be opened to realize the opening of the sixth cavity and the seventh cavity, one side of the seventh cavity is communicated with the lower side of the second pressure regulating assembly.

2. A load pressure regulating valve according to claim 1, wherein The second cavity comprises a first section and a second section, the first section is a horizontal section, the second section is a vertical upward section, the peripheral side of the first section is upwardly protruding, the height of the protruding part of the first section is smaller than the height of the second section, the second section is communicated with the third cavity and the fourth cavity through first hidden passages respectively, and the second section is communicated with the sixth cavity through a second hidden passage. One side of the seventh cavity is provided with an eighth cavity, the eighth cavity is communicated with the lower side of the second pressure regulating assembly through a third hidden passage, and the second section of the second cavity is communicated with the control valve through a fourth channel.

3. A load pressure regulating valve according to claim 1, wherein The pressure regulating piston is open at the top, the first valve body is arranged at the open top of the pressure regulating piston, and the first cavity is formed between the pressure regulating piston and the first valve body.

4. The empty and loaded pressure regulating valve of claim 1 wherein, The second pressure regulating assembly comprises a support plate, a diaphragm plate is arranged on the periphery of the support plate, the outer side of the diaphragm plate is fixed between the intermediate body and the first shell, a ninth cavity is formed between the upper side of the support plate and the second shell, a tenth cavity is formed between the lower side of the support plate and the first shell, and the tenth cavity is in communication with the seventh cavity and the fifth cavity respectively.

5. The empty and loaded pressure regulating valve of claim 1 wherein, The hollow part on the top side of the valve push rod is arranged in a reduced diameter.

6. A load pressure regulating valve according to claim 5, wherein The fourth pressure regulating assembly comprises a valve rod, the valve rod is connected with the second valve body, the valve rod passes through the bent piece and is connected with a first touch rod, the first touch rod is arranged through the top side of the third shell, the first touch rod is movable relative to the second shell, the first touch rod is connected with a second touch rod through an adjusting nut, an end block is arranged at the top of the seventh cavity, a pressure regulating elastic body is arranged in the seventh cavity through the top side of the valve push rod and the end block, a restoring elastic body is arranged in the seventh cavity through the top side of the bent piece and the end block, the restoring elastic body is located on the inner side of the pressure regulating elastic body, and the second touch rod is arranged with a blow-off channel in communication with the seventh cavity.

7. The empty and loaded vehicle pressure adjusting valve according to claim 1, characterized in that The pressure regulating valve comprises a pressure regulating valve shell, the pressure regulating valve shell is connected with the first shell, a display push rod is arranged in the pressure regulating valve shell, the display push rod is connected with a display card through the pressure regulating valve shell, a display elastic body is arranged between the display push rod and the pressure regulating valve shell, and the bottom side of the display card is hinged to the pressure regulating valve shell.

8. A method of operating a load pressure regulating valve according to any one of claims 1 to 7, characterized in that, The following contents are included: The pressure air in the air cylinder enters the second cavity through the control valve; The pressure air enters the first cavity through the first pressure regulating assembly, and the pressure air is divided into three passages after passing through the second cavity: one passage leads to the brake cylinder, one passage leads to the third cavity and the fourth cavity, and one passage leads to the sixth cavity; Under the action of the pressure air, the third pressure regulating assembly drives the fourth pressure regulating assembly to move upward until the fourth pressure regulating assembly contacts the adjusting pad, at this time, the third pressure regulating assembly is opened, the pressure air in the brake cylinder also enters the sixth cavity, and the pressure air enters the lower side of the second pressure regulating assembly from the sixth cavity and the seventh cavity; The air pressure on the lower side of the second pressure regulating assembly gradually rises, the air pressure in the third cavity gradually rises, and after rising to a set value respectively, the first pressure regulating assembly is driven to move upward, and the passage between the second cavity and the brake cylinder is cut off.

9. The method of operating a load pressure regulating valve as set forth in claim 8, wherein, The following contents are also included: When the load of the vehicle increases and the spring deflection of the bogie is greater than H, the limiting valve descends with the bogie, the position of the adjusting pad does not change, the stroke between the fourth pressure regulating assembly and the adjusting pad increases, the pressure of the pressure regulating elastic body increases, and when the pressure reaches a balance, the pressure air entering the lower side of the second pressure regulating assembly from the seventh cavity decreases, the passage between the second cavity and the brake cylinder gradually increases, and the pressure of the brake cylinder gradually increases with the increase of the load of the vehicle.

10. The method of operating a load pressure regulating valve as set forth in claim 8, wherein, The following contents are also included: When the load of the vehicle increases and the spring deflection of the bogie is greater than H, the limiting valve descends with the bogie, the position of the adjusting pad does not change, the stroke between the fourth pressure regulating assembly and the adjusting pad increases, the pressure of the pressure regulating elastic body increases, and when the pressure reaches a balance, the pressure air entering the lower side of the second pressure regulating assembly from the seventh cavity decreases, the passage between the second cavity and the brake cylinder gradually increases, and the pressure of the brake cylinder gradually increases with the increase of the load of the vehicle. When the driver implements the inflation relief, the control valve acts, its brake hole switches to the atmosphere, the second cavity communicates with the atmosphere, the brake cylinder and the pressure air of the sixth cavity push the first valve body to move downward, so that the first cavity communicates with the control valve, and the pressure air is communicated to the atmosphere, and the vehicle is relieved.

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