Water drain valve and air reservoir

Abstract

The invention relates to a water drain valve and an air reservoir. The water drain valve comprises a water drain valve body; the device comprises a first component, a second component, a push rod, a first return spring, a piston, a water drain valve switch, a second return spring and a detection connector valve element. Wherein the detection joint valve core is arranged in the water drain valve body, the detection joint valve core is in clearance fit with the water drain valve body, and the detection joint valve core can move along the axis of the water drain valve body; in the first state, the first return spring applies pressure to the push rod to form sealing fit between the push rod and the first component; the second return spring applies pressure to the end face of the detection connector valve element, and the end face of the detection connector valve element is in sealing fit with the water drain valve body through a sixth sealing ring. According to the water drain valve, the detection connector valve element is arranged in the water drain valve body, the functions of the water drain valve and the detection connector can be integrated, and therefore the water drain valve is high in function integration degree and space utilization rate.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle air cylinders, in particular to a water discharge valve and an air cylinder. Background Art

[0002] The working medium of pneumatic brake is compressed gas, which contains a lot of impurities such as oil and water. When the air handling unit (drying tank) fails, impurities such as water and oil will continue to accumulate in the air reservoir, affecting the effective volume of the air reservoir. Impurities such as oil and water will enter the brake valve body through the air reservoir and damage the valve body. Therefore, as a storage container for compressed air, the commercial vehicle air brake air reservoir needs to be equipped with a drain valve to drain water regularly.

[0003] At present, commercial vehicles all have the drain valve placed at the bottom of the air tank. However, placing it at the bottom will affect the vehicle's trafficability, and the driver needs to crawl under the vehicle to drain the water, which is inconvenient; and when draining the water, the driver needs to pull the pull ring for a long time by hand until the water in the air tank is drained. Summary of the invention

[0004] Based on this, the present application provides a drain valve and an air cylinder that can drain the water in the air cylinder without pulling the pull ring for a long time and without the driver having to drill under the vehicle to drain the water.

[0005] In a first aspect, the present application provides a drain valve, the drain valve comprising:

[0006] Drain valve body;

[0007] The first component is arranged inside the drain valve body, and a chamber is arranged inside the first component; the drain valve body and the first component are interference fit;

[0008] A second component is interference-fitted with the first component;

[0009] A push rod, which is in clearance fit with the first component and can move along the axis of the drain valve body in the chamber of the first component;

[0010] a first return spring disposed in the chamber of the first component and between the second component and the push rod;

[0011] The piston is arranged inside the drain valve body, the piston and the push rod are interference fit, and are sealed at the interference fit; the piston and the drain valve body are clearance fit, and a sealing component is arranged between the piston and the drain valve body;

[0012] The drain valve switch is used to push the piston and the push rod to move along the axis of the drain valve body;

[0013] The detection joint valve core is arranged inside the drain valve body, the detection joint valve core and the drain valve body are in clearance fit, and the detection joint valve core can move along the axis of the drain valve body;

[0014] A second return spring is arranged inside the drain valve body and between the piston and the valve core of the detection joint;

[0015] In the first state, the first return spring applies pressure to the push rod to form a sealing fit between the push rod and the first component; the second return spring applies pressure to the end face of the detection joint valve core, and the end face of the detection joint valve core and the drain valve body are sealed through the sixth sealing ring.

[0016] The drain valve can integrate the functions of the drain valve and the detection connector by arranging the detection connector valve core inside the drain valve body, and can be used to connect the air pressure detection equipment, thereby realizing a drain valve with high functional integration and high space utilization.

[0017] In one of the embodiments, when the drain valve is in the second state, the push rod applies pressure to the first return spring, the first return spring is compressed, and a gap is formed between the push rod and the first component; the second return spring applies pressure to the end face of the valve core of the detection joint, and the end face of the valve core of the detection joint is sealed with the valve body of the drain valve through the sixth sealing ring.

[0018] In one of the embodiments, when the drain valve is in the third state, the first return spring applies pressure to the push rod to form a sealing fit between the push rod and the first component; the end face of the valve core of the detection joint applies pressure to the second return spring, the second return spring is compressed, and a gap is formed between the end face of the valve core of the detection joint and the valve body of the drain valve.

[0019] In one embodiment, forming a sealing fit between the push rod and the first component includes:

[0020] The second sealing ring is fixed on the push rod through the second groove; the push rod and the end surface of the first component are squeezed and sealed by the second sealing ring;

[0021] The third sealing ring is fixed on the push rod through the third groove; the third sealing ring is used to seal the first gap between the push rod and the first component.

[0022] In one embodiment, the drain valve body is provided with a first hole and a second hole, and the first hole and the second hole are symmetrical about the axis of the drain valve body;

[0023] The piston is provided with a vertical through hole, and the round rod passes through the second hole and is fixed with the upper part of the vertical through hole of the piston by interference fit;

[0024] The sealing component includes a fourth sealing ring and a fifth sealing ring. The fourth sealing ring is fixed to one side of the piston relative to the through hole through a fourth groove, and the fifth sealing ring is fixed to the other side of the piston relative to the vertical through hole through a fifth groove.

[0025] In one embodiment, the drain valve further comprises:

[0026] A clamping ring, fixed to the drain valve through a sixth groove;

[0027] The retaining ring has one side limited and fixed by a clamping ring, and the other side is fixed in contact with the valve body of the drain valve; and the piston is provided with a plurality of axial through holes.

[0028] In one embodiment, the drain valve further comprises:

[0029] The detection joint cap is fixed at the seventh groove through a ring.

[0030] In one embodiment, the drain valve further comprises:

[0031] The drain valve switch is matched with the drain valve body through the connection thread;

[0032] A round rod, limited by a second hole;

[0033] The drain valve switch is rotated to move along the thread along the axis of the drain valve body, driving the round rod to move along the axis of the drain valve body, and the round rod drives the piston and the push rod to move along the axis of the drain valve body.

[0034] In a second aspect, the present application further provides an air storage cylinder, the air storage cylinder comprising:

[0035] An air reservoir body having a bottom, a top, a first end, and a second end;

[0036] As in the drain valve of any embodiment of the first aspect, the drain valve is arranged at the first end or the second end of the gas storage cylinder, and the drain valve further comprises: a first external thread, through which the drain valve is connected to the gas storage cylinder body; a first sealing ring, which is fixed at the first groove; the drain valve and the gas storage cylinder body are sealed by the first sealing ring;

[0037] Hose, fixed to the drain valve.

[0038] The above-mentioned air storage cylinder achieves the effects of good vehicle trafficability and convenient water discharge operation by placing the water discharge valves at both ends of the air storage cylinder instead of placing them at the lowest point of the air storage cylinder.

[0039] In one embodiment, the second component further includes inverted teeth; the hose is connected to the second component via the inverted teeth. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] FIG1 is a cross-sectional schematic diagram of a drain valve in a first state in an embodiment of the present application;

[0041] FIG2 is a cross-sectional schematic diagram of a drain valve in a second state in an embodiment of the present application;

[0042] FIG3 is a cross-sectional schematic diagram of a drain valve in a third state in an embodiment of the present application;

[0043] FIG4 is a schematic diagram of the structure of an air storage cylinder in an embodiment of the present application;

[0044] FIG5 is a schematic structural diagram of a drain valve in an embodiment of the present application;

[0045] FIG6 is a schematic diagram of the structure of a piston in an embodiment of the present application;

[0046] FIG. 7 is another cross-sectional schematic diagram of the drain valve in the third state in one embodiment of the present application. DETAILED DESCRIPTION

[0047] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0052] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0053] Referring to FIG1 , FIG1 is a schematic diagram showing a first state of a drain valve in an embodiment of the present application. A drain valve provided in an embodiment of the present application includes:

[0054] The drain valve body 11; the first component 15 is arranged inside the drain valve body 11, and a chamber is arranged inside the first component 15; the drain valve body 11 and the first component 15 are interference fit; the second component 13 is interference fit with the first component 15; the push rod 17, the push rod 17 and the first component 15 are clearance fit, and the push rod 17 can move along the axis of the drain valve body 11 in the chamber of the first component 15; the first return spring 14 is arranged in the chamber of the first component 15, and is located between the second component 13 and the push rod 17; the piston 19 is arranged inside the drain valve body 11, and the piston 19 and the push rod 1 7 interference fit, and sealed at the interference fit; the piston 19 is in clearance fit with the drain valve body 11, and a sealing component is provided between the piston 19 and the drain valve body 11; the drain valve switch 21 is used to push the piston 19 and the push rod 17 to move along the axis of the drain valve body 11; the detection joint valve core 24 is arranged inside the drain valve body 11, the detection joint valve core 24 is in clearance fit with the drain valve body 11, and the detection joint valve core 24 can move along the axis of the drain valve body 11; the second return spring 26 is arranged inside the drain valve body 11, and is located between the piston 19 and the detection joint valve core 24;

[0055] In the first state, the first return spring 14 applies pressure to the push rod 17 to form a sealing fit between the push rod 17 and the first component 15; the second return spring 26 applies pressure to the detection joint valve core end face 241, and the detection joint valve core end face 241 and the drain valve body 11 are sealed through the sixth sealing ring 25.

[0056] Specifically, the push rod 17 and the first component 15 are clearance-matched at the first gap 151. Exemplarily, the first state may be a non-operating state of the drain valve.

[0057] The drain valve can integrate the functions of the drain valve and the detection connector by setting the detection connector valve core 24 inside the drain valve body 11, and can be used to connect the air pressure detection equipment, thereby realizing a drain valve with high functional integration and high space utilization.

[0058] In one embodiment, please refer to FIG. 2, which shows a schematic diagram of the second state of the drain valve in one embodiment of the present application. When the drain valve is in the second state, the push rod 17 applies pressure to the first return spring 14, the first return spring 14 is compressed, and a gap is formed between the push rod 17 and the first component 15; the second return spring 26 applies pressure to the end face of the detection joint valve core 24, and the end face of the detection joint valve core 24 is sealed with the drain valve body 11 through the sixth sealing ring 25.

[0059] Exemplarily, the second state is the drain valve drain state. The drain valve body, the first component, the second component, the push rod, the first return spring, the piston, the drain valve switch, the detection joint valve core and the second return spring cooperate to form a drain circuit. In the second state, when the drain valve is opened for draining, no human intervention is required, and the drain valve can be closed after the draining is completed. That is, in this embodiment, the drain valve can be opened once, and when the draining starts, no human intervention is required. It only needs to wait until the accumulated water is drained and then close the drain valve once.

[0060] In one embodiment, please refer to FIG3, which shows a schematic diagram of the third state of the drain valve in one embodiment of the present application. When the drain valve is in the third state, the first return spring 14 applies pressure to the push rod 17 to form a sealing fit between the push rod 17 and the first component 15; the end surface of the detection joint valve core 24 applies pressure to the second return spring 26, the second return spring 26 is compressed, and a gap is formed between the end surface of the detection joint valve core 24 and the drain valve body 11.

[0061] Exemplarily, the third state is a state of detecting air pressure. An air pressure detection circuit is formed by the cooperation of the drain valve body, the first component, the second component, the push rod, the first return spring, the piston, the drain valve switch, the detection joint valve core and the second return spring.

[0062] In one embodiment, forming a sealing fit between the push rod 17 and the first component 15 includes:

[0063] The second sealing ring 16 is fixed to the push rod 17 through the second groove; the push rod 17 and the end surface of the first component 15 are squeezed and sealed by the second sealing ring 16; the third sealing ring 18 is fixed to the push rod 17 through the third groove; the first gap 151 between the push rod 17 and the first component 15 is sealed by the third sealing ring 18.

[0064] In the above embodiment, the second sealing ring 16 is fixed to the push rod 17 through the second groove; the push rod 17 and the end surface of the first component 15 are squeezed and sealed by the second sealing ring 16 to ensure the sealing of the water discharge circuit; and the third sealing ring 18 is fixed to the push rod 17 through the third groove; the first gap 151 between the push rod 17 and the first component 15 is sealed by the third sealing ring 18 to ensure that the high-pressure gas in the gas storage cylinder does not enter the water discharge circuit through the gap here.

[0065] In one embodiment, the drain valve body 11 is provided with a first hole 114 and a second hole 115, and the first hole 114 and the second hole 115 are symmetrical about the axis of the drain valve body 11; the piston 19 is provided with a vertical through hole 191, and the round rod 20 passes through the second hole 115 and is fixed with an interference fit with the upper part of the vertical through hole 191 of the piston 19; the sealing component includes a fourth sealing ring 28 and a fifth sealing ring 29, the fourth sealing ring 28 is fixed to one side of the piston 19 relative to the through hole through a fourth groove, and the fifth sealing ring 29 is fixed to the other side of the piston 19 relative to the vertical through hole 191 through a fifth groove.

[0066] In the above embodiment, the fourth sealing ring 28 and the fifth sealing ring 29 are sealed to ensure that the high-pressure gas in the gas storage cylinder will not pass through the first hole 114 and be discharged into the atmosphere.

[0067] In one embodiment, the drain valve further includes: a retaining ring 27, which is fixed to the drain valve through a sixth groove; a retaining ring 22, one side of which is limited and fixed by the retaining ring 27, and the other side is in contact and fixed with the drain valve body 11; and the piston 19 is provided with a plurality of axial through holes 192.

[0068] Exemplarily, the sixth groove is a groove provided on the drain valve body 11 .

[0069] In the above embodiment, the cooperation between the retaining ring and the clamping ring makes the water discharge circuit and the air pressure detection circuit independent of each other and do not affect each other, thereby avoiding the problem that when the water discharge and the air pressure detection share a circuit, if there is water accumulation in the cylinder, water will be sprayed out of the cylinder when the air pressure is detected, thereby damaging the air pressure detection instrument.

[0070] In one embodiment, the drain valve further includes: a detection joint cap 23 fixed at the seventh groove through a ring 231 .

[0071] Exemplarily, the seventh groove is a groove provided on the drain valve body 11 .

[0072] In one of the embodiments, the drain valve also includes: a drain valve switch 2, which is threadedly engaged with the drain valve body 11 through the connecting portion 112; a round rod 20, which is limited by the second hole 115; wherein, by rotating the drain valve switch 2 and moving along the thread along the axis of the drain valve body 11, the round rod 20 is driven to move along the axis of the drain valve body 11, and the round rod 20 drives the piston 19 and the push rod 17 to move along the axis of the drain valve body 11.

[0073] Please refer to Figure 4, which is a schematic diagram of the structure of the gas cylinder in an embodiment of the present application, and refer to Figure 1 at the same time. The gas cylinder provided by the present application includes: a gas cylinder body, the gas cylinder body has a bottom, a top, a first end and a second end; a drain valve as in any of the above embodiments, the drain valve is arranged at the first end or the second end of the gas cylinder, and the drain valve also includes: a first external thread 111, the drain valve is connected to the gas cylinder body through the first external thread 111; a first sealing ring 30, the first sealing ring 30 is fixed at the first groove; the drain valve and the gas cylinder body are sealed by the first sealing ring 30; a hose 12 is fixed to the drain valve.

[0074] Exemplarily, the hose 12 is a nylon hose, which extends into the interior of the gas storage cylinder. Under the action of gravity, the nylon hose naturally droops to the bottom of the gas storage cylinder. Further, the drain valve is installed at the end caps at both ends of the gas storage cylinder, which is higher than the lowest point of the gas storage cylinder wall.

[0075] The above-mentioned air storage cylinder achieves the effects of good vehicle trafficability and convenient water discharge operation by placing the water discharge valve at the end of the air storage cylinder instead of placing it at the lowest point of the air storage cylinder.

[0076] And, further, the present application can be applied to metal gas cylinders, eliminating the opening at the drain valve at the bottom of the cylinder body, thereby improving the strength of the cylinder body and improving space utilization; the present application can also be applied to composite gas cylinders, where the drain valve cannot be placed on the cylinder body and can only be placed at the end. The present application can solve the water drain problem of composite gas cylinders.

[0077] In one embodiment, the second component 13 further includes inverted teeth 131 ; the hose 12 is connected to the second component 13 via the inverted teeth 131 .

[0078] Please refer to FIG. 1 again and FIG. 5 at the same time. FIG. 5 is a three-dimensional diagram of a drain valve in an embodiment of the present application. In one embodiment, the drain valve of the present application is in the first state:

[0079] The drain valve body 11 is connected to the gas storage cylinder through the first external thread 111. At the same time, in order to ensure the sealing between the present application and the gas storage cylinder, a first sealing ring 30 is provided between the drain valve body 11 and the gas storage cylinder for sealing. The first sealing ring 30 is fixed to the first groove at the root of the drain valve body 11; the drain valve body 11 and the first component 15 are fixed by the groove interference fit; the hose 12 and the second component 13 are connected and fixed by the inverted teeth 131 on the second component 13; the second component 13 and the first component 15 are fixed by the interference fit, and the second component 13 is fixed by the interference fit. The interference fit must be sealed; the first component 15 and the push rod 17 are clearance fit at the first gap 151, and the push rod 17 can move axially along the first component 15; the second sealing ring 16 is fixed to the push rod 17 through the second groove; when the water is not discharged, under the action of the first return spring 14, the push rod 17 and the end face of the first component 15 are squeezed and sealed by the second sealing ring 16 to ensure the sealing of the water discharge circuit; the third sealing ring 18 is fixed to the push rod 17 through the third groove; the first gap 151 formed with clearance fit is sealed by the third sealing ring 18 is sealed to ensure that the high-pressure gas in the gas storage cylinder will not enter the water discharge circuit through the gap here; the push rod 17 and the piston 19 are fixed by interference fit, and the interference fit must be sealed; the drain valve body 11 has a first hole 114 and a second hole 115 that are symmetrical up and down; the piston 19 is provided with a vertical through hole 191, and the round rod 20 passes through the second hole 115 and is fixed with the upper half of the vertical through hole 191 of the piston 19 by interference fit; the fourth sealing ring 28 and the fifth sealing ring 29 are fixed on the piston 19 through the groove; the piston 19 and the drain valve body 1 1 is a clearance fit, which is sealed by the fourth sealing ring 28 and the fifth sealing ring 29 to ensure that the high-pressure gas in the gas storage cylinder will not be discharged into the atmosphere through the gap at the second gap 117 and the gap at the third gap 116 through the first hole 114; the drain valve switch 21 and the drain valve body 11 are threadedly matched at the connecting part 112, and the drain valve switch 21 can be rotated to move left and right along the thread, and at the same time, it will drive the round rod 20 to move left and right. The round rod 20 is limited by the second hole 115, and the round rod 20 can drive the piston 19 and the push rod 17 to move along the axis of the drain valve body 11. Please also refer to Figure 6, which is a schematic diagram of the structure of the piston.The piston 19 has several axial through holes 192, and the high-pressure gas in the gas storage cylinder can be connected to the chamber where the retaining ring 22 is located through the axial through holes 192; the first side of the retaining ring 22 (the right side in Figure 1) is in contact with the drain valve body 11 and fixed, and the second side (the left side in Figure 1) is limited and fixed by the clamping ring 27, and the clamping ring 27 is fixed by the groove of the drain valve body 11; the detection joint valve core 24 is clearance-matched with the drain valve body 11 and can move along the axis; when the air pressure is not detected, in the second return position Under the action of the spring 26, the detection joint valve core end face 241 and the drain valve body 11 are squeezed and sealed by the sixth sealing ring 25 to ensure the sealing of the detection joint circuit; the detection joint cap 23 is made of rubber and is fixed to the groove of the drain valve body 11 by a ring 231; when the air pressure is not detected, the detection joint protection cap 232 is fixed to the drain valve body 11 as shown in Figure 1 to prevent dust; the drain valve body 11 has a second external thread 113 for connecting the air pressure detection equipment.

[0080] Please refer to FIG. 2 again. In one embodiment, when the drain valve of the present application is in the second state:

[0081] As shown in Figure 2, when the driver needs to drain the water, he can rotate the drain valve switch 21 to make the drain valve switch 21 move to the left along the thread, thereby driving the round rod 20, the piston 19, and the push rod 17 to move in the first direction (to the left in Figure 2), and at the same time drive the second sealing ring 16, the third sealing ring 18, the fourth sealing ring 28, and the fifth sealing ring 29 to move in the first direction at the same time. As the push rod 17 drives the second sealing ring 16 to move to the left, a gap appears between the push rod 17 and the first component 15; under the action of the high-pressure gas in the air storage cylinder, the accumulated water in the air storage cylinder flows through the inside of the hose 12, the through hole 132 of the second component, the chamber where the first return spring 14 is located, the gap 152 between the first component 15 and the push rod 17, the first gap 151 between the push rod 17 and the first component 15, the internal passage 171 of the push rod 17, the lower half of the vertical through hole 191 of the piston 19, and the first oblong hole 114 below the drain valve body 11 to the atmosphere; after the drain is completed, the drain valve switch 21 is rotated in the opposite direction until the round rod 20 is reset, and the seal can be completed again and the first state can be restored.

[0082] Please refer to FIG. 3 again and FIG. 7 at the same time. FIG. 7 is another cross-sectional view of the drain valve in the third state in one embodiment of the present application. In one embodiment, when the drain valve of the present application is in the third state:

[0083] As shown in FIG3 , when testing the air pressure, the detection joint cap 23 is removed, and the air pressure detection device is connected to the drain valve body 11 through the second external thread 113. During the tightening process, the air pressure detection device will contact the end face 244 of the detection joint valve core 24, and after contact, the detection joint valve core 24 is pushed to move to the left; the detection joint valve core 24 moves to the left, driving the sixth sealing ring 25 to move in the first direction (to the left in FIG3 ), and at this time, a gap 224 appears between the detection joint valve core 24 and the drain valve body 11. Please refer to Figure 6 at the same time, and in combination with Figure 3 and Figure 7, at this time, the high-pressure gas in the air storage cylinder can enter the chamber where the second return spring 26 is located through the second gap 117, the axial through hole 192, and the third hole 221 loop in sequence, and then enter the axial through hole 243 of the detection joint valve core through the gap 224, the second gap 117, and the vertical through hole 242 of the detection joint valve core in sequence; the axial through hole 243 of the detection joint valve core is connected to the air pressure detection equipment, and the high-pressure gas value in the air storage cylinder can be read out by the air pressure detection equipment at this time; after the air pressure detection is completed, the air pressure detection equipment is rotated and unscrewed in the opposite direction along the second external thread 113 to complete the sealing again, and then the detection joint cap 23 is installed back to prevent dust, covering the end face 244, and returning to the first state.

[0084] In the present application, the drain valve is installed at the end caps at both ends of the gas cylinder, which is higher than the lowest point of the gas cylinder wall. The vehicle has good passability and the drain operation is convenient. And through reasonable structural settings, two independent gas circuits are used inside the drain valve, which do not interfere with each other. One circuit is used for draining water, and the other circuit is used for detecting air pressure, which can realize the functions of draining water and detecting air pressure. And the drain valve can be opened at one time. When draining water, there is no need for human intervention. You only need to wait until the accumulated water is drained and then close the drain valve at one time. And the gas cylinder of the present application, one end extends into the gas cylinder through a nylon hose. The nylon hose is affected by gravity and droops to the lowest point of the gas cylinder wall. The accumulated water can be discharged through the high-pressure gas in the gas cylinder.

[0085] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0086] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A drain valve, characterized in that: The drain valve comprises: Drain valve body; A first component is arranged inside the drain valve body, and a chamber is arranged inside the first component; the drain valve body and the first component are interference fit; a second component, interference-fitted with the first component; A push rod, the push rod is in clearance fit with the first component, and the push rod can move along the axis of the drain valve body in the chamber of the first component; a first return spring disposed in the chamber of the first component and between the second component and the push rod; The piston is arranged inside the drain valve body, the piston and the push rod are interference fit, and are sealed at the interference fit; the piston and the drain valve body are clearance fit, and a sealing component is arranged between the piston and the drain valve body; A drain valve switch, used to push the piston and the push rod to move along the axis of the drain valve body; The detection joint valve core is arranged inside the drain valve body, the detection joint valve core and the drain valve body are in clearance fit, and the detection joint valve core can move along the axis of the drain valve body; A second return spring is arranged inside the drain valve body and between the piston and the detection joint valve core; In the first state, the first return spring applies pressure to the push rod to form a sealing fit between the push rod and the first component; the second return spring applies pressure to the end face of the detection joint valve core, and the end face of the detection joint valve core is sealed with the drain valve body through the sixth sealing ring.

2. The drain valve according to claim 1, characterized in that: In the second state, the push rod applies pressure to the first return spring, the first return spring is compressed, and a gap is formed between the push rod and the first component; the second return spring applies pressure to the end face of the detection joint valve core, and the end face of the detection joint valve core is sealed with the drain valve body through the sixth sealing ring.

3. The drain valve according to claim 1, characterized in that: In the third state, the first return spring applies pressure to the push rod to form a sealing fit between the push rod and the first component; the end face of the detection joint valve core applies pressure to the second return spring, the second return spring is compressed, and a gap is formed between the end face of the detection joint valve core and the drain valve body.

4. The drain valve according to claim 1, characterized in that: Forming a sealing fit between the push rod and the first component includes: The second sealing ring is fixed on the push rod through the second groove; the push rod and the end surface of the first component are squeezed and sealed by the second sealing ring; The third sealing ring is fixed on the push rod through the third groove; the third sealing ring is used to seal the first gap between the push rod and the first component.

5. The drain valve according to claim 1, characterized in that: The drain valve body is provided with a first hole and a second hole, and the first hole and the second hole are symmetrical about the axis of the drain valve body; The piston is provided with a vertical through hole, and the round rod passes through the second hole and is fixed to the upper part of the vertical through hole of the piston by interference fit; The sealing member includes a fourth sealing ring and a fifth sealing ring. The fourth sealing ring is fixed to one side of the piston relative to the through hole through a fourth groove, and the fifth sealing ring is fixed to the other side of the piston relative to the vertical through hole through a fifth groove.

6. The drain valve according to claim 1, characterized in that: Also includes: A clamping ring, fixed to the drain valve through a sixth groove; A retaining ring, one side of which is limited and fixed by a snap ring, and the other side of which is in contact and fixed with the valve body of the drain valve; and a plurality of axial through holes are arranged on the piston.

7. The drain valve according to claim 1, characterized in that: Also includes: The detection joint cap is fixed at the seventh groove through a ring.

8. The drain valve according to claim 5, characterized in that: Also includes: A drain valve switch, which is threadedly matched with the drain valve body through a connecting portion; A round rod, limited by the second hole; The drain valve switch is rotated to move along the thread along the axis of the drain valve body, thereby driving the round rod to move along the axis of the drain valve body, and the round rod drives the piston and the push rod to move along the axis of the drain valve body.

9. A gas storage cylinder, characterized in that: The gas storage cylinder comprises: an air reservoir body having a bottom, a top, a first end, and a second end; The drain valve according to any one of claims 1 to 8, wherein the drain valve is disposed at the first end or the second end of the gas storage cylinder, and the drain valve further comprises: A first external thread, wherein the drain valve is connected to the air storage cylinder body via the first external thread; A first sealing ring, the first sealing ring is fixed at the first groove; the drain valve and the air storage cylinder body are sealed by the first sealing ring; A hose is fixed to the drain valve.

10. The gas cylinder according to claim 9, characterized in that The second component further comprises inverted teeth; the hose is connected to the second component via the inverted teeth.

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