Adaptive joint and air cylinder

Abstract

The invention relates to an adaptive joint and an air cylinder, the adaptive joint comprises a fastener and a rotating nut, a first section of the rotating nut sleeves the outer side of a first part of the fastener through an annular rotating part, an internal thread is arranged in a second section of the rotating nut, and an accommodating cavity is formed between the second section of the rotating nut and a second part of the fastener; the element is arranged in the accommodating cavity; the internal thread of the rotating nut is matched with the external thread of the element to fix the element; and the other connecting section of the adaptive joint is connected with the air cylinder through the external threads. The air cylinder and the drainage ball valve are connected in a threaded mode, disassembly and maintenance of the drainage ball valve are facilitated, sealing is achieved through the sealing ring, and the sealing effect between the air cylinder and the drainage ball valve is improved.

Description

Technical Field

[0001] The present application relates to the technical field of air cylinders, and in particular to an adapter joint and an air cylinder. Background Art

[0002] In the air brake system of rail vehicles, the air cylinder is a commonly used energy storage element. In order to prevent condensed water from accumulating in the cylinder, a drain ball valve is often installed under the air cylinder. The existing connection method is to first install the sealing ring and transition joint, then apply fastening glue to the external thread under the transition joint, and finally install the drain ball valve. After adjusting the direction of the ball valve, it is fixed and sealed with threaded fastening glue. The gluing operation has high requirements, and there are detailed regulations on the gluing process and glue preservation. In addition, due to the differences in the process level of workers, the fastening and sealing effects are often uneven. In addition, the use of glue to fasten and seal the air cylinder and the drain ball valve is not convenient for disassembly and maintenance. The quality of the glue filling is difficult to ensure when the ball valve is disassembled and reinstalled, causing the drain ball valve to loosen and fall off, which may leak air at the least, or affect driving safety in serious cases. Summary of the invention

[0003] In view of the technical problem that the air cylinder and the ball valve are currently fixed with glue, resulting in poor sealing effect and difficulty in disassembly and maintenance, the present application provides an adapter joint, including:

[0004] A fastener, the fastener comprising at least one connecting section, the connecting section comprising a first portion and a second portion connected to each other;

[0005] A hollow rotating nut, comprising a first section and a second section connected to each other, wherein the first section is sleeved on the outside of the first section, and a receiving cavity is formed between the second section and the second section;

[0006] The annular rotating member is sandwiched between the first section and the first part, and the rotating nut rotates in situ relative to the first part through the annular rotating member.

[0007] Furthermore, the annular rotating member is a rotating ring.

[0008] Furthermore, the inner surface of the second section has a first internal thread. When the connecting section is connected to an element with an external thread, the element is placed in the accommodating cavity, the rotating nut rotates in situ through the annular rotating member, and the first internal thread cooperates with the external thread to fix the element.

[0009] Furthermore, the fastener includes a first connecting section and a second connecting section connected to each other, the outer surface of the first connecting section is provided with a first external thread, and the second connecting section is connected to the rotating nut.

[0010] Furthermore, a step is provided between the first connecting section and the second connecting section, and a first sealing ring is provided on a surface of the step close to and facing the first connecting section.

[0011] Furthermore, a force-bearing section is provided between the stage and the second connecting section, and the force-bearing section is polygonal in cross-section along a plane perpendicular to the central axis of the fastener.

[0012] Further, the end of the second portion is configured to have a radius that gradually decreases in a direction away from the first portion.

[0013] Furthermore, a second sealing ring is provided on the outer surface of the end of the second part.

[0014] Furthermore, the first external thread is configured as a G3 / 4 thread.

[0015] Furthermore, a through hole is provided at the axis of the fastener.

[0016] The present application further provides an air cylinder, which includes the above-mentioned adapter joint, and the adapter joint connects the air cylinder and the pipe joint of the drainage ball valve.

[0017] Furthermore, the first connecting section of the adapter joint is connected to the air cylinder, the pipe joint is accommodated in the accommodating cavity, and the first internal thread of the rotating nut cooperates with the external thread of the pipe joint to fix the pipe joint.

[0018] Furthermore, one end of the pipe joint away from the adapter joint is connected to a drainage ball valve.

[0019] The present application relates to an adapter and an air cylinder. The adapter includes a fastener and a rotating nut. The first section of the rotating nut is sleeved on the outside of the first part of the fastener through an annular rotating member. The second section of the rotating nut is provided with an internal thread, and a receiving cavity is formed between the second section of the rotating nut and the second part of the fastener. When connecting a component with an external thread, the component is placed in the receiving cavity, and the internal thread of the rotating nut cooperates with the external thread of the component to fix the component; the other connecting section of the adapter is connected to the air cylinder through an external thread. The present application connects the air cylinder and the drainage ball valve by thread, which is convenient for disassembly and maintenance of the drainage ball valve, and realizes sealing by a sealing ring, thereby improving the sealing effect between the air cylinder and the drainage ball valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the adapter for this application;

[0021] Figure 2 A cross-sectional view of the adapter for this application;

[0022] Figure 3 This is a schematic diagram of the connection between the air cylinder and the adapter;

[0023] Figure 4 An enlarged cross-sectional view of the air cylinder and adapter connection.

[0024] Description of Reference Numerals

[0025] 1. Fastener; 10. Air cylinder; 11. First connecting section; 111. First external thread; 12. Second connecting section; 121. Second sealing ring; 13. Stage; 131. First sealing ring; 14. Force-bearing section; 2. Rotating nut; 21. First internal thread; 3. Annular rotating part; 4. Through hole; 5. Central axis; 100. Adapter joint; 200. Pipe joint; 300. Drain ball valve. DETAILED DESCRIPTION

[0026] In order to more fully understand the features and technical contents of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In other cases, in order to simplify the drawings, well-known structures and devices may be simplified for display.

[0027] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0028] In the embodiments disclosed in this application, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments disclosed in this application can be understood according to the specific circumstances.

[0029] In order to further understand the purpose, structure, features, and functions of this application, the following embodiments and appendix Figure 1-4 The detailed instructions are as follows.

[0030] In view of the technical problem that the air cylinder and the drain ball valve are currently fixed with glue, resulting in poor sealing effect and difficulty in disassembly and maintenance, the present application provides an adapter joint 100, see Figure 1 and Figure 2The adapter joint 100 includes a fastener 1, a rotating nut 2 and an annular rotating member 3, wherein the fastener 1 includes at least one connecting section, and the connecting section includes a first part and a second part connected to each other; the rotating nut 2 is hollow, and the rotating nut 2 includes a first section and a second section connected to each other, the first section is sleeved and connected to the outer side of the first section, and a receiving cavity is formed between the second section and the second section, and the receiving cavity is an annular cavity; the annular rotating member 3 is clamped between the first section and the first section, and the rotating nut 2 rotates in situ relative to the first section through the annular rotating member 3. The setting of the annular rotating member 3 makes the connecting section of the fastener 1 fixed when the rotating nut 2 rotates in situ relative to the first part of the connecting section, thereby improving the flexibility and convenience of the connection between the components.

[0031] The fastener 1 may include a plurality of connecting sections to adapt to different installation scenarios, wherein at least one connecting section includes a first portion and a second portion.

[0032] In one embodiment, the first portion of the connecting section is in a cylindrical structure, and an annular rotating member 3 is sleeved on the outer surface of the connecting section so as to be rotatably connected to the rotating nut 2 via the annular rotating member 3 .

[0033] The rotating nut 2 rotates in situ relative to the first part through the annular rotating member 3, that is, when the rotating nut 2 rotates, the rotating nut 2 has no displacement relative to the connecting section of the fastener 1 in the direction along the central axis 5 of the fastener 1.

[0034] Preferably, the annular rotating member 3 can be a bearing or a rotating ring. In one embodiment of the present application, the annular rotating member 3 is a rotating ring, which is a circular ring structure, so that the rotating nut 2 can rotate in situ relative to the first part of the fastener 1. Specifically, a rotating ring is sleeved on the outside of the first part of the connecting section, and the inner diameter of the rotating ring matches the outer diameter of the first part of the fastener 1, ensuring that the rotating ring can be tightly sleeved on the outside of the fastener 1 without falling off. The first part of the fastener 1 is rotatably connected to the first section of the rotating nut 2 through the rotating ring. The outer diameter of the rotating ring matches the inner diameter of the first section of the rotating nut 2, so that the first section of the rotating nut 2 can be sleeved on the rotating ring and realize relative rotation with the first part of the fastener 1 through the rotating ring, that is, rotation in situ.

[0035] The material of the annular rotating member 3 is preferably a wear-resistant, low-friction material, such as polytetrafluoroethylene, nylon, metal, or other wear-resistant, low-friction materials to ensure that the rotating nut 2 rotates smoothly and does not wear easily. In the present application, the material of the annular rotating member is a metal material.

[0036] Preferably, an annular groove with the central axis 5 of the fastener 1 as the axis is provided on the outer side of the first part of the fastener 1 and the inner side of the first section of the rotating nut 2 to accommodate the annular rotating member 3. The annular groove provides a stable and reliable rotating interface, reducing friction and wear between the rotating nut 2 and the fastener 1.

[0037] In an optional embodiment, the inner surface of the second section of the rotating nut 2 has a first internal thread 21 so as to be able to cooperate with an element with an external thread. When the connecting section is connected to an element with an external thread, the element is placed in a receiving cavity formed between the rotating nut 2 and the fastener 1, and the rotating nut 2 is rotated in situ by the annular rotating member 3 to fix or release the element. As the rotating nut 2 rotates, the first internal thread 21 on the inner surface of the second section thereof gradually cooperates with the external thread of the element, thereby tightly fixing the element in the receiving cavity; when it is necessary to disassemble the adapter 100 or replace the element with an external thread, the rotating nut 2 is rotated in the opposite direction so that the first internal thread 21 cooperates with the external thread of the element until it is separated, and then the element can be easily removed from the receiving cavity. The cooperation between the rotating nut 2 and the annular rotating member 3 allows the connection structure between the adapter 100 and the element with an external thread to be easily disassembled and reinstalled without destroying any parts, which is convenient for subsequent maintenance and repair work.

[0038] In one embodiment, the component with external threads is a pipe connector 200, which is a standard component connected to the adapter connector 100 and the drainage ball valve 300 in the air cylinder drainage system.

[0039] The fastener 1 includes a first connecting section 11 and a second connecting section 12 connected to each other. The outer surface of the first connecting section 11 is provided with a first external thread 111. The second connecting section 12 is connected to the rotating nut 2. The second connecting section 12 cooperates with the rotating nut 2 to fix the elements to be connected.

[0040] A first external thread 111 is provided on the outer surface of the first connecting section 11 to achieve cooperation and fastening with a component having an internal thread. In the embodiment of the present application, the component having an internal thread is the drain outlet of the air cylinder 10. The first external thread 111 on the first connecting section 11 of the fastener 1 is cooperated and fastened with the internal thread of the drain outlet of the air cylinder 10 to achieve the connection between the adapter joint 100 and the drain outlet of the air cylinder 10.

[0041] Preferably, a step 13 is provided between the first connecting section 11 and the second connecting section 12 , and a first sealing ring 131 is provided on a surface of the step 13 close to and facing the first connecting section 11 , thereby improving the sealing performance of the adapter 100 .

[0042] Along the direction perpendicular to the central axis 5 , the cross-sectional area of ​​the step portion 13 is larger than the cross-sectional area of ​​the first connecting segment 11 .

[0043] The stage 13 is used to install a first sealing ring 131. When the first connecting section 11 is connected to other components, the first sealing ring 131 seals a gap generated when the first connecting section 11 is connected to other components.

[0044] Here, the first sealing ring 131 is an SD sealing ring, which can be made of an elastic material that is oil-resistant, high-temperature-resistant, and corrosion-resistant.

[0045] Preferably, a force-bearing section 14 is provided between the stage 13 and the second connecting section 12, and the force-bearing section 14 is polygonal along a section perpendicular to the central axis 5 of the fastener 1. When a fastening force is applied, the polygon enables the force-bearing section 14 to better resist the tendency of rotation and slippage, and the vertices of the polygon provide more locking points, so that the fastener 1 is not prone to relative rotation and slippage when subjected to external force, thereby improving the stability and reliability of the connection.

[0046] In an optional embodiment, along a direction perpendicular to the central axis 5 , the cross-sectional area of ​​the force-bearing segment 14 is greater than the cross-sectional area of ​​the platform segment 13 .

[0047] The force-bearing section 14 is integrally formed with the connecting section of the adapter 100 . The polygonal design of the force-bearing section 14 enables the fastening force to be more effectively transmitted from the force-bearing section 14 to the entire fastener 1 , thereby improving the fastening efficiency.

[0048] In one embodiment, the end of the second part of the rotating nut 2 is configured to gradually reduce its radius in a direction away from the first part, presenting a cone-like structure, so that the second part can pass more easily when inserted or fitted into other components, thereby reducing friction and resistance during the installation process; at the same time, since the radius of the end gradually decreases, the conical structure can adapt to the aperture or shape of the element to be connected during the insertion process.

[0049] In order to better implement the present application, a second sealing ring 121 is provided on the outer surface of the end of the second part to further improve the sealing and stability of the connection. The second sealing ring 121 is adjacent to the connection interface that needs to be sealed. In the present application, the connection interface that needs to be sealed is the outer surface of the end of the second part and the inner surface of the element accommodated in the accommodating cavity.

[0050] In the present application, the second sealing ring 121 is set as an O-shaped annular sealing ring, which is made of elastic material and has good deformation performance and adaptability, so as to achieve close fit to the small unevenness of the connection interface and ensure a good sealing effect. At the same time, the second sealing ring absorbs the small vibration of the connection interface to a certain extent, reduces the risk of sealing failure caused by vibration, and improves the sealing stability.

[0051] Furthermore, the first external thread 111 is configured as a G3 / 4 thread. The G3 / 4 thread is a standard pipe thread, and its size and specification follow the relevant international or national thread standards. "G" represents the pipe thread, and "3 / 4" represents the nominal diameter or size of the thread, which refers to 3 / 4 inches here. Since the first external thread 111 of the first connecting section 11 is configured in accordance with standard specifications, it can be matched and connected with components with the same thread specifications, achieving interoperability between different devices and systems, greatly simplifying the installation and maintenance process.

[0052] In the present application, the first external thread 111 of the first connecting section 11 cooperates with the internal thread of the drain port of the air cylinder 10. The drain port of the air cylinder 10 is a standard G3 / 4 thread, and a seamless fit is achieved between the two, ensuring the tightness and reliability of the connection, and effectively preventing drainage leakage between the first external thread 111 and the drain port.

[0053] When the adapter 100 is connected to the air cylinder 10 , it is necessary to consider the drainage of the air cylinder 10 , and a through hole 4 is provided at the axis of the fastener 1 .

[0054] In an optional embodiment, the through hole 4 sequentially passes through the first connecting section 11, the platform section 13, the force-bearing section 14 and the second connecting section 12, so that during the drainage process of the air cylinder 10, water can flow smoothly through the through hole 4, avoiding the problem of poor drainage due to blockage.

[0055] In one embodiment, the diameter of the through hole 4 is set to 3 mm, which ensures smooth drainage of the air cylinder 10 and avoids excessive air leakage. It should be noted that the present application does not impose any specific restrictions on the diameter of the through hole 4, and the diameter of the through hole 4 can be flexibly set according to actual needs such as the drainage volume, water pressure and air leakage requirements of the air cylinder.

[0056] The present application further provides a wind cylinder 10, see Figure 3 and Figure 4 The air cylinder 10 includes the above-mentioned adapter 100, which connects the air cylinder 10 with the pipe joint 200 of the drain ball valve 300. The adapter 100 serves as a bridge connecting the air cylinder 10 and the drain ball valve 300. The first connection section of the adapter 100 is connected to the drain port of the air cylinder 10, and the second connection section is connected to the pipe joint 200 to form a drainage path. Since the connection parts of the drain port of the air cylinder 10 and the pipe joint 200 are of standard shape and standard size, the size of the adapter 100 of the present application is set to match the size of the connection parts of the drain port of the air cylinder 10 and the pipe joint 200. The standardized design ensures the compatibility and interchangeability between different components, simplifies the installation and maintenance process, and at the same time, improves the reliability and stability of the connection, and reduces the leakage and looseness problems caused by size mismatch.

[0057] Preferably, the first connecting section 11 of the adapter joint 100 is connected to the air cylinder 10, and the pipe joint 200 is accommodated in the accommodating cavity. The first internal thread 21 of the rotating nut 2 cooperates with the external thread of the pipe joint 200 to fix the pipe joint 200. The air cylinder 10 and the pipe joint 200 are connected by the adapter joint 100, which facilitates the disassembly and maintenance of each component. After the adapter joint 100 and the pipe joint 200 are fixed, the pipe joint 200 withstands the axial tension in the direction of the central axis 5, and is sealed with the help of the second sealing ring of the second connecting section 12.

[0058] Specifically, the outer surface of the first connecting section 11 has a first external thread 111, which cooperates with the internal thread of the drain port of the air cylinder 10 to fix the adapter joint 100 to the air cylinder 10; the second connecting section 12 of the adapter joint 100 is connected to the pipe joint 200, one end of the pipe joint 200 is placed in the accommodating cavity, and the external thread arranged on its outer surface cooperates with the first internal thread 21 of the rotating nut 2. When the rotating nut 2 is rotated, the first internal thread 21 on the inner surface of the second section will gradually cooperate with the external thread of the component, thereby tightly fixing the component in the accommodating cavity; when it is necessary to disassemble the adapter joint 100 or replace the component with an external thread, rotate the rotating nut 2 in the opposite direction so that the first internal thread 21 and the external thread of the component are separated, and then the component can be easily removed from the accommodating cavity.

[0059] When the pipe connector 200 needs to be fixed, the rotating nut 2 is rotated, and the pipe connector 200 is tightly pressed against the inner wall of the accommodating cavity by using the accommodating cavity between the first section thereof and the first part of the fastener 1. The annular rotating member 3 enables the rotating nut 2 to rotate in place without driving the fastener 1 to rotate, thereby achieving the sealing and fixing of the pipe connector 200 and the fastener 1, and at the same time, effectively avoiding the problem of loose connection of other connecting sections caused by the fastener 1 rotating with the rotating nut 2. When the pipe connector 200 needs to be disassembled, the rotating nut 2 is rotated in the opposite direction to easily remove the pipe connector 200 from the accommodating cavity.

[0060] One end of the pipe joint 200 away from the adapter joint 100 is connected to the drain ball valve 300. The 300 air cylinder 10 is connected to the adapter joint 100, the pipe joint 200 and the drain ball valve 300 in sequence through the air and drain port. A through hole 4 is set at the axis of the 300 adapter joint 100, corresponding to the through hole 4 of the pipe joint 200 to the drain ball valve 300, so that the water in the air cylinder 10 flows through the adapter joint 100 and the pipe joint 200 to the drain ball valve 300, and then is discharged or controlled.

[0061] When the air cylinder 10 drains water, the water first enters the adapter 100 through the drain port of the air cylinder 10, and flows along the through hole 4 that passes through the axis of the adapter 100. Since the through hole 4 corresponds to the through hole of the pipe joint 200, the water continues to flow through the through hole of the pipe joint 200 and finally reaches the drain ball valve 300. At the drain ball valve 300, the water can be discharged to the external environment, or the drain switch and the drain flow rate can be adjusted through the control of the drain ball valve.

[0062] In order to achieve a better sealing effect, the present application provides a first sealing ring 131 on the stage 13 of the fastener 1 and a second sealing ring 121 on the outer surface of the end of the second part of the second connecting section 12 of the fastener 1, thereby ensuring a smooth connection and sealing performance between the air cylinder 10 and the drain ball valve 300, so that water can flow freely in the through hole 4 and be discharged or the flow rate can be controlled through the drain ball valve 300.

[0063] The present application relates to an adapter 100 and an air cylinder 10. The adapter 100 includes a fastener 1 and a rotating nut 2. The first section of the rotating nut 2 is sleeved on the outside of the first part of the fastener 1 through an annular rotating member 3. The second section of the rotating nut 2 is provided with an internal thread, and a receiving cavity is formed between the second section of the rotating nut 2 and the second part of the fastener 1. When connecting a component with an external thread, the component is placed in the receiving cavity, and the internal thread of the rotating nut 2 cooperates with the external thread of the component to fix the component; the other connecting section of the adapter 100 is connected to the air cylinder 10 through an external thread. The present application connects the air cylinder 10 and the drain ball valve 300 by threading, which is convenient for disassembly and maintenance of the drain ball valve 300, and achieves sealing through a sealing ring, thereby improving the sealing effect between the air cylinder 10 and the drain ball valve 300.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0065] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, which can be embodied in any computer-readable medium for use by an instruction execution system, apparatus or device (such as a computer-based system, a system including a processor or other system that can fetch instructions from an instruction execution system, apparatus or device and execute instructions), or used in combination with these instruction execution systems, apparatuses or devices.

[0066] The present application has been described by the above-mentioned relevant embodiments, but the above-mentioned embodiments are only examples for implementing the present application. It must be pointed out that the disclosed embodiments do not limit the scope of the present application. On the contrary, changes and modifications made without departing from the spirit and scope of the present application are all within the scope of patent protection of the present application.

Claims

1. An adapter, characterized in that: include: A fastener, the fastener comprising at least one connecting section, the connecting section comprising a first portion and a second portion connected to each other; A hollow rotating nut, comprising a first section and a second section connected to each other, wherein the first section is sleeved on the outside of the first section, and a receiving cavity is formed between the second section and the second section; The annular rotating member is sandwiched between the first section and the first part, and the rotating nut rotates in situ relative to the first part through the annular rotating member.

2. The adapter according to claim 1, characterized in that: The annular rotating member is a rotating ring.

3. The adapter according to claim 1, characterized in that: The inner surface of the second section has a first internal thread. When the connecting section is connected to an element with an external thread, the element is placed in the accommodating cavity, the rotating nut rotates in situ through the annular rotating member, and the first internal thread cooperates with the external thread to fix the element.

4. The adapter according to claim 1, characterized in that: The fastener comprises a first connecting section and a second connecting section connected to each other, the outer surface of the first connecting section is provided with a first external thread, and the second connecting section is connected to the rotating nut.

5. The adapter according to claim 4, characterized in that: A step is provided between the first connecting section and the second connecting section, and a first sealing ring is provided on a surface of the step close to and facing the first connecting section.

6. The adapter according to claim 5, characterized in that: A force-bearing section is provided between the stage and the second connecting section, and the force-bearing section is polygonal in cross-section along a plane perpendicular to the central axis of the fastener.

7. The adapter according to claim 1, characterized in that: The end of the second portion is configured to have a radius that gradually decreases in a direction away from the first portion.

8. The adapter according to claim 7, characterized in that: A second sealing ring is provided on the outer surface of the end of the second part.

9. The adapter according to claim 4, characterized in that: The first external thread is configured as a G3 / 4 thread.

10. The adapter according to claim 1, characterized in that: A through hole is arranged at the axis center of the fastener.

11. A wind cylinder, characterized in that: The air cylinder comprises the adapter joint described in any one of claims 1 to 10, and the adapter joint connects the air cylinder and a pipe joint of a drainage ball valve.

12. The air cylinder according to claim 11, characterized in that: The first connecting section of the adapter joint is connected to the air cylinder, the pipe joint is accommodated in the accommodating cavity, and the first internal thread of the rotating nut cooperates with the external thread of the pipe joint to fix the pipe joint.

13. The air cylinder according to claim 11, characterized in that: One end of the pipe joint away from the adapter joint is connected to a drainage ball valve.

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