Detachable water meter valve assembly

Abstract

The utility model provides a detachable water meter valve assembly which is installed on a water meter and comprises a cylindrical valve body, a valve cavity is formed in the valve body, a water inlet and a water outlet are formed in the side wall of the valve cavity, a valve element is rotatably installed in the valve cavity, the bottom face of the valve body serves as a first sealing face, and the two sides of the valve body serve as second sealing faces. An annular installation groove used for installing a sealing ring is formed in the edge of the first sealing face, the outer side of the annular installation groove extends outwards in the radial direction and penetrates to the side wall of the valve body, a strip-shaped installation groove used for installing a sealing strip is formed in the second sealing face, and the lower end of the strip-shaped installation groove communicates with the annular installation groove. And a plane formed by the two strip-shaped mounting grooves is perpendicular to the first sealing surface. The detachable water meter valve assembly is compact in structure, low in manufacturing cost, high in machining precision, convenient and labor-saving to assemble, long in service life and low in use and maintenance cost, and the overall structural strength of a pipeline is greatly improved.

Description

Technical Field

[0001] This utility model relates to a water meter, and more particularly to a detachable water meter valve assembly. Background Technology

[0002] In existing valve-controlled water meters, the flow rate is controlled by a valve core and its components. The existing valve components are mostly assembled into parts on the water meter body, and then the water meter body and the pipe section are fixed in a secondary manner through joints. The joint fixing point must withstand the shear force of the water meter pipe section and the water meter body, as well as the water pressure of the water network. As a result, the joint often breaks. After damage, the entire joint needs to be removed and replaced, which is very cumbersome.

[0003] The existing valve-controlled water meter housing components are mostly made of materials that are not easily corroded, such as copper, stainless steel, or plastic. These metals are expensive, and their surfaces easily absorb common water ions such as calcium and magnesium, forming scale, which can affect the valve torque and even damage the valve body. In addition, plastic housing components are not very strong.

[0004] Therefore, our company has developed a detachable valve assembly, which has been applied for separately. However, due to its structure, it requires high machining precision and has certain processing difficulties, which affects the production cost. Utility Model Content

[0005] Technical problems to be solved

[0006] The technical problem to be solved by this utility model is to provide a detachable water meter valve assembly that is compact in structure, easy to process, low in production cost, and has good performance.

[0007] Technical solutions to the problem

[0008] This utility model provides a detachable water meter valve assembly, installed on a water meter, including a cylindrical valve body 1. A valve cavity is formed inside the valve body 1. The side wall of the valve cavity has an inlet and an outlet. A valve core 13 for controlling the connection or blockage between the inlet and the outlet is rotatably installed inside the valve cavity. The bottom surface of the valve body 1 serves as a first sealing surface, and the two sides of the valve body 1 serve as second sealing surfaces. An annular mounting groove for installing a sealing ring 21 is formed on the edge of the first sealing surface. The outer side of the annular mounting groove extends radially outward and penetrates to the side wall of the valve body 1. A strip-shaped mounting groove 111 for installing a sealing strip 22 is formed on the second sealing surface. The lower end of the strip-shaped mounting groove 111 connects to the annular mounting groove, and the plane formed by the two strip-shaped mounting grooves 111 is perpendicular to the first sealing surface.

[0009] Furthermore, the plane formed by the two strip-shaped mounting grooves 111 is perpendicular to the line connecting the inlet and the outlet.

[0010] Furthermore, the sidewall of the valve body 1 is inclined, and the angle between it and the first sealing surface is greater than or equal to 85 degrees and less than 90 degrees.

[0011] Furthermore, the bottom surface of the sealing ring 21 protrudes from the bottom surface of the valve body 1 and / or the edge of the sealing ring 21 protrudes from the side wall of the valve body 1.

[0012] Furthermore, the sealing ring 21 and the sealing strip 22 are integrally formed.

[0013] Furthermore, the sidewall of the sealing strip 22 is tangent to the sidewall of the sealing ring 21.

[0014] Furthermore, a water passage groove 220 is provided on the side wall of the sealing strip 22, which is used to allow a small amount of domestic water to flow through when the valve core is closed.

[0015] Furthermore, the inner wall of the strip-shaped mounting groove 111 is provided with a locking block 112 that can be inserted into the water passage groove 220 and fix the sealing strip.

[0016] Furthermore, the valve body 1 is composed of two valve blocks 11 joined together and can accommodate the valve core 13 to be installed into the valve body.

[0017] Furthermore, the water meter includes a casing 8 and an inlet pipe and an outlet pipe disposed on the side wall of the casing. The inlet pipe includes a vertically disposed first straight pipe section 81 and a first arc-shaped section 811 connected thereto. The outlet pipe includes a second straight pipe section 82 coaxial with the first straight pipe section 81 and a second arc-shaped section 821 connected thereto. The casing 8 has an inlet channel connected to the first arc-shaped section 811 and an outlet channel connected to the second arc-shaped section 821 formed inside. The side wall of the inlet channel or the outlet channel is provided with a mounting platform. The mounting platform has a valve hole 80a that connects to the channel inside the pipe and allows the valve body to be inserted axially. The edge of the mounting platform is provided with a mounting hole for mounting a cover plate 4 to fix the valve body.

[0018] Beneficial effects

[0019] This utility model relates to a detachable water meter valve assembly. The optimized valve body structure reduces processing difficulty, improves processing accuracy, lowers production and maintenance costs, facilitates assembly, provides excellent sealing, and has a long service life. It employs an integrated sealing component structure, ensuring convenient assembly, good sealing, and high reliability. A locking block structure secures the sealing component, enhancing the overall structural compactness and preventing the sealing strip from warping or shifting outwards, thus improving assembly and sealing performance and enhancing stability and reliability. The valve body uses a split-type splicing structure, resulting in low manufacturing costs and convenient assembly, enabling the valve to achieve… Pre-installed, it can be installed from the side wall of the pipeline without disassembling the pipe section, simplifying the assembly process and greatly reducing manufacturing, use, and maintenance costs. It has a wide range of applications. The valve body is assembled from valve blocks, ensuring high manufacturing precision and facilitating the disassembly and assembly of the valve core, thus reducing production, assembly, and maintenance costs. The water meter features an arc-shaped pipe section, which reduces or avoids internal water flow impact, lowers pressure loss, and improves performance. This utility model's detachable water meter valve assembly has a compact structure, low manufacturing cost, high processing precision, and convenient and labor-saving assembly, greatly improving the overall structural strength of the pipeline, extending its service life, and reducing use and maintenance costs. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the installation of the detachable water meter valve assembly of this utility model;

[0021] Figure 2 This is a cross-sectional view of the installation of the detachable water meter valve assembly of this utility model;

[0022] Figure 3 This is an exploded view of the installation of the detachable water meter valve assembly of this utility model;

[0023] Figure 4 This is a cross-sectional view of the housing of the detachable water meter valve assembly of this utility model.

[0024] Figure 5 This is a schematic diagram of the detachable water meter valve assembly of this utility model;

[0025] Figure 6 This is another structural schematic diagram of the detachable water meter valve assembly of this utility model;

[0026] Figure 7 This is an exploded structural diagram of the detachable water meter valve assembly of this utility model;

[0027] Figure 8 This is an exploded view of the detachable water meter valve assembly of this utility model from another angle.

[0028] Figure 9 This is an exploded structural diagram of the valve body of the detachable water meter valve assembly of this utility model.

[0029] Figure 10 for Figure 7 Enlarged view of section A in the middle;

[0030] Figure 11 This is a cross-sectional view of the valve body of the detachable water meter valve assembly of this utility model;

[0031] Figure 12 for Figure 11 Enlarged view of section B;

[0032] Figure 13 for Figure 11 Enlarged view of section C;

[0033] Figure 14 This is a schematic diagram of the sealing element of the detachable water meter valve assembly of this utility model;

[0034] Figure 15 for Figure 14 Enlarged view of section D in the middle. Detailed Implementation

[0035] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0036] See Figures 1-15 The present invention provides a detachable water meter valve assembly, which can be pre-assembled and then installed on the water meter, and control the flow of the flow channel inside the water meter to realize opening, closing and flow rate adjustment. It includes a valve body 1, a valve core 13 and a cover plate 4.

[0037] The valve body 1 serves as a fixing and installation carrier, used to fix (axially insert) it to the side wall of the water meter. The two side walls and lower end of the valve body 1 are provided with working surfaces (sealing surfaces) for sealing. Specifically, the valve body is cylindrical with a flat bottom surface serving as the first sealing surface, and the two sides serving as the second sealing surfaces. These surfaces are used to contact the inner wall of the valve hole on the water meter pipeline. A sealing element is provided between the sealing surface of the valve body and the contact surface of the valve hole inner wall to achieve sealing, thereby blocking the water pipeline for flow control. A valve cavity is formed inside the valve body 1, with water inlets 110 on both sides of the valve cavity. The two water inlets 110 are located on both sides of the second sealing surface, serving as the inlet and outlet respectively. The valve core 13 is rotatably installed in the valve cavity to control the flow between the inlet and outlet, controlling the connection, blockage, and size between the inlet and outlet. A valve stem 3 is provided at the top of the valve core to control its rotation. A hole is passed through the top of the valve cavity to allow the valve stem to pass through.

[0038] In this embodiment, the first sealing surface is perpendicular to the axis of the valve body and is circular. An annular mounting groove is provided on the edge of the first sealing surface for installing the sealing ring 21. The annular mounting groove is circular and extends radially outward from the outer side, penetrating to the side wall of the valve body 1. That is, the lower end and outer edge of the annular mounting groove are connected (penetrating) to the bottom surface and side wall of the valve body 1, respectively. A strip-shaped mounting groove 111 is provided on the second sealing surface. The strip-shaped mounting groove is strip-shaped and is used to install the sealing strip 22. The lower end of the strip-shaped mounting groove 111 is connected to the annular mounting groove. At the same time, the plane formed by the two strip-shaped mounting grooves 111 is perpendicular to the first sealing surface. Preferably, the plane formed by the two strip-shaped mounting grooves 111 is perpendicular to the line connecting the inlet and outlet. Through the above structure, the manufacturing process difficulty can be greatly reduced, the processing accuracy can be improved, and the production cost can be reduced, while also facilitating assembly.

[0039] With the aforementioned annular mounting groove 111, after the sealing ring 21 is installed, the bottom surface of the sealing ring 21 protrudes from the bottom surface of the valve body 1, or the edge of the sealing ring 21 protrudes from the side wall of the valve body 1, or both simultaneously. That is, the sealing ring 21 can simultaneously achieve end face sealing and radial surface sealing, resulting in good sealing performance. In this embodiment, the axial depth and radial width of the annular mounting groove 111 are the same and both are smaller than the cross-sectional diameter of the sealing ring 21. This allows the lower end and edge of the sealing ring 21 to protrude from the bottom surface and side wall of the valve body 1, respectively, thereby generating elastic deformation and achieving sealing.

[0040] In this embodiment, the sealing ring 21 has a circular cross-section, while the sealing strip 22 has a rectangular cross-section. The sealing ring 21 and the sealing strip 22 are integrally formed to form the sealing element 2. Meanwhile, the sidewall of the sealing strip 22 is tangent to the sidewall of the sealing ring 21, which facilitates improved sealing performance and installation strength.

[0041] The valve assembly of this application is mainly used in water meters, which are smart water meters. When a user is in arrears or defaults on water bills, the water meter will be shut off. To ensure the user's basic drinking water needs, a water passage groove is provided on the side wall of the valve body 1 or the seal 2. This water passage groove is used to allow a small amount of water to flow through when the valve core is closed. This water is essential for the user's daily life. In this embodiment, a water passage groove 220 is provided on the side wall of the sealing strip 22. This water passage groove 220 is used to allow a small amount of essential water to flow through when the valve core is closed. At the same time, in order to improve the installation reliability of the seal 2, in this embodiment, two opposing locking blocks 112 are provided on the inner wall of the strip mounting groove 111. The two locking blocks 112 can be locked into the water passage groove 220, thereby fixing the sealing strip. It can be assembled and then assembled onto the water meter as a whole, avoiding detachment and displacement, and improving the reliability and stability of the assembly.

[0042] In this embodiment, the water channel and the locking block are positioned at the upper part to improve the fixing effect on the sealing components, especially the sealing strip, and to prevent the upper end from tilting outward or shifting, which would affect the assembly or sealing effect.

[0043] To improve the sealing effect, in this application, the side wall of the valve body 1 is inclined, forming a conical structure with a larger upper end and a smaller lower end. Its inclination is small, and the angle between it and the first sealing surface is greater than or equal to 85 degrees and less than 90 degrees, preferably between 88 and 89 degrees, which facilitates overall assembly and sealing, and improves assembly efficiency and sealing performance.

[0044] The cover plate 4 is used to install on the top of the valve body 1, thereby fixing the valve body 1 to the water meter pipe. The cover plate 4 has mounting holes on its edge for fixing to the side wall (mounting platform) of the water meter pipe with bolts, thereby connecting the valve to the pipe. The cover plate 4 has a shaft hole in its center, which allows the valve stem 3 to pass through, thereby enabling the rotation adjustment of the valve core. The cover plate 4 has a pressing part and a limiting part at its lower end. The pressing part is used to axially press the valve body 1, so that the valve body 1 is fully inserted into the pipe and the sealing element 2 (sealing ring and sealing strip) contacts the inner wall of the pipe to achieve a reliable seal.

[0045] In this application, the valve body 1 is composed of at least two valve blocks spliced ​​together, which can accommodate the valve core to be installed into the valve body to form a complete valve structure.

[0046] A boss is provided at the center of the upper or lower surface of the cover plate, or both the upper and lower surfaces of the cover plate 4. The boss is cylindrical and has a through hole at its end face to form a shaft hole. This shaft hole is used to increase the axial length of the shaft hole, increase the contact area between the shaft hole and the valve stem 3, thereby improving the installation reliability and stability of the valve stem, preventing deflection, and improving the stable control of the valve core. The lower end of the boss forms a first pressing surface. At the same time, an upward step surface is provided on the side wall of the valve stem 3. The first pressing surface can contact the step surface, thereby achieving axial limiting of the valve stem 3. After the valve stem 3 passes through the shaft hole from bottom to top, it is fixed by a snap ring.

[0047] Meanwhile, an annular protrusion is provided on the lower surface of the cover plate 4. The annular protrusion is coaxial with the shaft hole. The lower end of the annular protrusion forms a second pressing surface. The second pressing surface can contact the top of the valve body and thus press the valve body downward during assembly. The outer wall of the annular protrusion forms a sealing element mounting surface for installing a second sealing element. The second sealing element is annular in shape and is used to achieve a seal between the cover plate and the mounting platform of the pipe side wall.

[0048] The valve body 1 has several first positioning protrusions on its top. Each first positioning protrusion is cylindrical and there are at least two of them. They are evenly distributed around the axis of the valve body 1. Meanwhile, the bottom surface of the cover plate 4 has positioning grooves that correspond one-to-one with the first positioning protrusions and can accommodate their insertion. These grooves are used to radially position the valve body 1 during assembly, thereby improving assembly accuracy. The ends of the first positioning protrusions are chamfered or rounded, which enables quick and accurate insertion and improves assembly efficiency.

[0049] In this application, the valve body 1 is composed of two valve blocks 11 spliced ​​together. These blocks can be arranged horizontally, front-back, or vertically, and the mating surfaces (planes) of the two valve blocks pass through the center of the valve cavity. That is, sub-valve cavities are opened on both valve blocks, and the two sub-valve cavities form a complete valve cavity, which facilitates the installation of the valve core. At the same time, mounting holes are opened on the two valve blocks to allow bolts to pass through and to achieve a fixed connection between the two valve blocks. This allows the valve body to form a whole, enabling pre-assembly and preventing it from falling apart, which facilitates subsequent assembly operations. In order to improve assembly efficiency and accuracy, a positioning component is provided between the contact surfaces of the two valve blocks. This positioning component consists of a second positioning protrusion (pin) and a second positioning groove (pin hole). The second positioning groove can accommodate the insertion of the second positioning protrusion on the other valve block, enabling rapid assembly.

[0050] In this application, when the valve blocks are arranged in a front-to-back or left-to-right configuration, the two valve blocks have the same structure and are arranged in a centrally symmetrical manner, which can reduce production costs. Only one mold is needed to process and produce the two valve blocks.

[0051] The following describes the split structure of the valve body. For ease of explanation, the inlet direction is considered the front, the outlet direction is considered the rear, the direction from the cover plate is considered the top, and the direction away from the cover plate is considered the bottom.

[0052] The valve body 1 is formed by splicing two valve blocks 11 arranged front and rear. Its parting surface (the contact surface of the two valve blocks) is perpendicular to the line connecting the inlet and outlet. The valve cavity is formed by splicing two sub-chambers. The water inlets are respectively opened on the two valve blocks 11. A positioning component is provided on the parting surface of the valve block 11. The positioning component includes a second positioning protrusion and a second positioning groove, both of which are cylindrical. The second positioning protrusion and the second positioning groove are symmetrically arranged with respect to the vertical plane of the first valve block 11. Therefore, the structures of the two valve blocks 11 are exactly the same, which can greatly reduce production costs. During assembly, one of the first valve blocks only needs to be rotated 180 degrees to fit against the other first valve block. In order to facilitate assembly and prevent the valve body from falling apart, a pre-assembly is formed to improve assembly efficiency. Two mounting holes are symmetrically opened on the valve block 11, which can be fixed by bolts. The mounting holes located on the side wall of the valve body are countersunk holes to avoid the bolts being exposed and affecting the assembly. In this embodiment, the valve core 13 is a ball valve.

[0053] The valve blocks are arranged front and rear, and the strip mounting groove is located on the two valve blocks for quality inspection. This also facilitates the assembly of the seals, especially the assembly of the locking block into the locking groove, thereby improving assembly efficiency and accuracy.

[0054] In this application, the water meter is a vertical water meter, which includes a meter housing 8 for installing a flow counter. An inlet channel and an outlet channel are provided on the side wall of the meter housing 8. These channels are arranged parallel vertically and on the same side of the meter housing 8. In this embodiment, the inlet channel is located at the lower end, and the outlet channel is located at the upper end. The side walls of the inlet and outlet channels are connected to each other, which improves the overall structural strength and facilitates (casting) manufacturing. An inlet pipe is provided at the end of the inlet channel. The inlet pipe includes a vertically arranged first straight pipe section 81 and a first arc-shaped section 811 connected thereto. The first arc-shaped section 811 connects to the inlet pipe... The water flow channels are interconnected, and the two ends of the first arc-shaped segment are tangent to the first straight pipe segment and the inlet water flow channel, respectively. The outlet pipe includes a second straight pipe segment 82 and a second arc-shaped segment 821 connected thereto. The second straight pipe segment 82 is coaxial with the first straight pipe segment 81. The second arc-shaped segment 821 is connected to the outlet water flow channel, and the two ends of the second arc-shaped segment are tangent to the second straight pipe segment and the outlet water flow channel, respectively. Through the above structural arrangement, the water meter pressure loss can be greatly reduced, resulting in good performance. An installation platform is provided on the side wall of the inlet or outlet water flow channel. Since the outlet water flow channel is located at the upper end in this embodiment, the installation platform is set on the top of the side wall of the outlet water flow channel for easy operation. The top surface of the mounting platform serves as the mounting surface. The axis of this mounting surface is perpendicular to and intersects the axis of the water outlet channel. A valve hole 80a is provided on the mounting platform. This valve hole 80a is a circular hole with a cross-section identical in shape and size to the valve body. The bottom surface of the valve hole is flat, allowing the valve body to be inserted axially. Since the sidewall of the valve body has a certain taper, the inner wall of the valve hole also has the same taper as the valve body to facilitate assembly. This ensures that the valve body can be smoothly inserted into the valve hole. After insertion, the working surface of the valve body's sidewall is essentially in contact with the sidewall of the valve hole. The bottom surface of the lower end of the valve body is flat and is sealed to the bottom surface of the valve hole. The mounting platform is circular, requiring only ordinary machine tools for machining, eliminating the need for milling machines or machining centers, making it convenient and cost-effective. Multiple mounting holes are evenly distributed along the circumference of the mounting platform for mounting the cover plate 4. To reduce the overall size and prevent its width from exceeding the outer diameter of the water outlet pipe, four lugs are provided along the edge of the platform, with mounting holes formed on these lugs. A circular sealing ring mounting groove is provided on the mounting platform for installing a second sealing element. The second sealing element is located between the mounting platform and the cover plate, achieving a seal between them, i.e., an end-face seal.

[0055] A reinforcing rib 83 is provided between the first arc segment and the second arc segment, which can improve the overall structural strength, reliability and stability, and extend service life.

[0056] Meanwhile, a movement mounting cavity 80b is provided on the watch case 8 for mounting the movement, which is connected to the valve hole and the water outlet channel.

[0057] This utility model features a detachable water meter valve assembly. The optimized valve body structure reduces processing difficulty, improves machining accuracy, lowers production and maintenance costs, provides excellent sealing, and has a long service life. The integrated sealing structure facilitates assembly, ensures good sealing, and enhances reliability. A locking mechanism secures the sealing element, improving overall structural compactness and preventing the sealing strip from warping or shifting outwards, thus improving stability and reliability. The valve body employs a modular assembly structure, resulting in low manufacturing costs, easy assembly, and pre-installation capability. This detachable water meter valve assembly can be installed from the side wall of the pipeline without disassembling the pipe section. The assembly process is simple, greatly reducing manufacturing, use, and maintenance costs, and it has a wide range of applications. The valve body is assembled from valve blocks, with high manufacturing precision, which facilitates the disassembly and assembly of the valve core, reducing production, assembly, and maintenance costs. The water meter is equipped with an arc-shaped pipe section, which can reduce or avoid internal water flow impact, reduce pressure loss, and improve the performance. This utility model of detachable water meter valve assembly has a compact structure, low manufacturing cost, high processing precision, and convenient and labor-saving assembly, which greatly improves the overall structural strength of the pipeline, has a long service life, and low use and maintenance costs.

[0058] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A detachable water meter valve assembly, installed on a water meter, characterized in that: The valve includes a cylindrical valve body with a valve cavity formed inside. The valve cavity has an inlet and an outlet on its side wall. A valve core for controlling the connection or blockage between the inlet and the outlet is rotatably installed inside the valve cavity. The bottom surface of the valve body serves as a first sealing surface, and the two sides of the valve body serve as second sealing surfaces. An annular mounting groove for installing a sealing ring is formed on the edge of the first sealing surface. The outer side of the annular mounting groove extends radially outward and penetrates to the side wall of the valve body. A strip-shaped mounting groove for installing a sealing strip is formed on the second sealing surface. The lower end of the strip-shaped mounting groove connects to the annular mounting groove, and the plane formed by the two strip-shaped mounting grooves is perpendicular to the first sealing surface.

2. The detachable water meter valve assembly as described in claim 1, characterized in that: The plane formed by the two strip-shaped mounting grooves is perpendicular to the line connecting the inlet and the outlet.

3. The detachable water meter valve assembly as described in claim 1, characterized in that: The sidewall of the valve body is inclined, and the angle between it and the first sealing surface is greater than or equal to 85 degrees and less than 90 degrees.

4. The detachable water meter valve assembly as described in claim 1, characterized in that: The bottom surface of the sealing ring protrudes from the bottom surface of the valve body and / or the edge of the sealing ring protrudes from the side wall of the valve body.

5. The detachable water meter valve assembly as described in claim 1, characterized in that: The sealing ring and the sealing strip are integrally formed.

6. The detachable water meter valve assembly as described in claim 5, characterized in that: The sidewall of the sealing strip is tangent to the sidewall of the sealing ring.

7. The detachable water meter valve assembly as described in claim 1, characterized in that: A water passage groove is provided on the side wall of the sealing strip, which is used to allow a small amount of domestic water to flow through when the valve core is closed.

8. The detachable water meter valve assembly as described in claim 7, characterized in that: The inner wall of the strip-shaped mounting groove is provided with a locking block that can be inserted into the water passage groove and fix the sealing strip.

9. The detachable water meter valve assembly as described in claim 1, characterized in that: The valve body is composed of two valve blocks joined together and can accommodate the valve core to be installed inside the valve body.

10. The detachable water meter valve assembly as described in claim 1, characterized in that: The water meter includes a casing and an inlet pipe and an outlet pipe disposed on the side wall of the casing. The inlet pipe includes a first straight pipe section arranged vertically and a first arc-shaped section connected thereto. The outlet pipe includes a second straight pipe section coaxial with the first straight pipe section and a second arc-shaped section connected thereto. The casing is formed with an inlet channel connected to the first arc-shaped section and an outlet channel connected to the second arc-shaped section. The side wall of the inlet channel or the outlet channel is provided with a mounting platform. The mounting platform has a valve hole that connects to the channel inside the pipe and allows the valve body to be inserted axially. The edge of the mounting platform is provided with mounting holes for installing a cover plate to fix the valve body.

Images