H valve with valve stem rotation limiting structure

Abstract

The utility model provides a kind of H valve with valve stem rotation limiting structure, including connecting arm and two parallel and interval arrangement ball valve unit;Each ball valve unit includes valve body assembly, valve core and valve stem, the outer wall of one of valve body assembly is integrally connected with the two ends of connecting arm respectively, each valve stem is rotatably connected in the valve rod assembly hole on corresponding valve body assembly, each valve core is rotatably connected in corresponding valve body assembly, the inner end of each valve stem is drivingly connected with corresponding valve core, and the outer end of each valve stem is extended outside valve body assembly;Its characterized in that: two protruding parts that are circumferentially uniformly distributed are provided on the outer wall of the upper portion of valve stem, two limit blocks that are circumferentially uniformly distributed are provided on the inner wall of the upper end of valve rod assembly hole, arc-shaped groove is formed between the two limit blocks, and each protruding part is slidingly fitted in corresponding arc-shaped groove;The ball valve unit in the utility model has the advantages of high opening and closing control accuracy.

Description

Technical Field

[0001] This utility model relates to the field of H-valve technology, and more specifically, to an H-valve with a valve stem rotation limiting structure. Background Technology

[0002] The H-valve is an important component of the heating pipe system. Currently, H-valve systems on the market mainly consist of a connecting arm and two ball valve assemblies spaced apart on either side. The connecting arm is positioned between the two ball valve assemblies, with its two ends fixed to the outer wall of the valve body in the corresponding ball valve assembly. One ball valve assembly is connected in series between the outlet and inlet pipes of the underfloor heating system, while the other is connected in series between the outlet and return pipes. When both ball valve assemblies are open, hot water from the inlet pipe flows through the underfloor heating system and returns to the return pipe. In this way, indoor heating is achieved; when both ball valve assemblies are closed, hot water is prevented from flowing through the underfloor heating pipes, thus stopping indoor heating; currently, Chinese patent announcement number: CN223447775U discloses a heating and ventilation H valve, which can control the opening and closing of the ball valve assembly by rotating the valve stem during use. However, in this heating and ventilation H valve structure, due to the lack of a limiting structure for the rotation of the valve stem, it is difficult to control the rotation range of the valve stem during rotation, thus making it difficult to achieve precise control of the opening and closing of the ball valve assembly. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an H valve with a valve stem rotation limiting structure, whose internal ball valve unit has the advantage of high accuracy in opening and closing control.

[0004] This utility model provides an H-valve with a valve stem rotation limiting structure, including a connecting arm and two parallel and spaced-apart ball valve units. Each ball valve unit includes a valve body assembly, a valve core, and a valve stem. The connecting arm is located between the two ball valve units, and both ends of the connecting arm are integrally connected to the outer wall of one of the valve body assemblies. Each valve stem is rotatably connected to a valve stem mounting hole on the corresponding valve body assembly, and each valve core is rotatably connected to the corresponding valve body assembly. The inner end of each valve stem is drively connected to the corresponding valve core. Both ends extend beyond the valve body assembly; characterized in that: two circumferentially evenly distributed protrusions are provided on the outer wall of the upper part of the valve stem, and two circumferentially evenly distributed limiting blocks are provided on the inner wall of the upper end of the valve stem mounting hole, forming an arc-shaped groove between the two limiting blocks, and each protrusion slides in the corresponding arc-shaped groove; when the ball valve unit is in the open state, both protrusions abut against the limiting block at one end of the corresponding arc-shaped groove, and when the ball valve unit is in the closed state, both protrusions abut against the limiting block at the other end of the corresponding arc-shaped groove.

[0005] By adopting the above structure, when the valve stem is rotated to open the ball valve unit, the two protrusions on the valve stem can abut against the limiting block at one end of the corresponding arc groove. When the valve stem is rotated to close the ball valve unit, the two protrusions on the valve stem can abut against the limiting block at the other end of the corresponding arc groove. This enables precise control of the valve stem rotation range, i.e., precise control of the opening and closing of the ball valve unit.

[0006] In one possible implementation, the valve stem has an annular protrusion at its center. The upper end of the annular protrusion abuts against two limiting blocks to prevent the valve stem from disengaging from the valve stem assembly hole from the inside out. An annular groove is provided in the center of the annular protrusion in the axial direction, and an O-ring is fitted onto the annular groove to seal the gap between the valve stem and the valve stem assembly hole. By adopting this structure, since the upper end of the annular protrusion abuts against the two limiting blocks, the valve stem can be prevented from disengaging from the valve stem assembly hole from the inside out.

[0007] In one possible implementation, a slotted groove is provided on the outer end of the valve stem. With this method, when the valve stem needs to be turned, the slotted groove is engaged with the slotted groove, and the valve stem can be turned with the slotted screwdriver. This has the advantage of easy valve stem turning, which also has the advantage of easy opening or closing of the ball valve unit.

[0008] In one possible implementation, annular expansion portions are provided at the connection points between both ends of the connecting arm and the outer wall of the valve body assembly. By adopting this structure, the connection strength between the connecting arm and the valve body assembly can be improved under the action of the annular expansion portions, so as to avoid the connection point between the connecting arm and the valve body assembly from breaking.

[0009] In one possible implementation, the ball valve unit further includes a sealing gasket; the sealing gasket abuts against the outlet end of the valve body assembly, and an annular boss is provided on the inner edge of the sealing gasket facing the outlet end, the annular boss being inserted into the outlet end and tightly fitted with the inner wall of the outlet end; with this structure, when the outlet end is connected to the end of the pipe fitting, the sealing gasket can reliably seal the gap between the outlet end and the end of the pipe fitting; and by providing an annular boss on the inner edge of the sealing gasket facing the outlet end, the annular boss can be inserted into the outlet end and tightly fitted with the inner wall of the outlet end, thereby allowing the sealing gasket to be pre-installed on the outlet end and preventing the sealing gasket from detaching from the outlet end. At the same time, it can also ensure the coaxiality of the sealing gasket and the outlet end, so that the sealing gasket can reliably achieve circumferential sealing of the gap between the outlet end and the end of the pipe fitting.

[0010] In one possible implementation, an annular rounded corner surface is provided on the outer peripheral wall of the end of the annular boss away from the sealing gasket. The annular rounded corner surface is used to cooperate with the inner wall of the water outlet for guidance so that the annular boss can be inserted into the water outlet. With this structure, during the process of inserting the annular boss into the water outlet, the annular rounded corner surface can cooperate with the inner wall of the water outlet for guidance so that the annular boss can be inserted into the water outlet, which can facilitate the assembly of the sealing gasket and the water outlet.

[0011] In one possible implementation, an annular rib is provided on the outer peripheral wall of the annular boss, and an annular groove is provided on the inner peripheral wall of the water outlet. The annular rib and the annular groove are circumferentially fitted together. With this structure, after the annular boss is inserted into the water outlet, the annular rib can be circumferentially fitted together with the annular groove, thereby further preventing the sealing gasket from detaching from the water outlet. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the present invention. Detailed Implementation

[0013] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0014] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0015] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0016] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] See Figures 1-2 As shown in the figure, this application discloses an H-valve with a valve stem rotation limiting structure, including a connecting arm 1 and two ball valve units 2 arranged in parallel and spaced apart; each ball valve unit 2 includes a valve body assembly 21, a valve core 22 and a valve stem 23. The connecting arm 1 is located between the two ball valve units 2, and both ends of the connecting arm 1 are integrally connected to the outer wall of one of the valve body assemblies 21. Each valve stem 23 is rotatably connected to the valve stem mounting hole 211 on the corresponding valve body assembly 21. Each valve core 22 is rotatably connected to the corresponding valve body assembly 21. The inner end of each valve stem 23 is drively connected to the corresponding valve core 22, and the outer end of each valve stem 23 extends outward. Outside the valve body assembly 21; characterized in that: two circumferentially evenly distributed protrusions 231 are provided on the outer wall of the upper part of the valve stem 23, and two circumferentially evenly distributed limiting blocks 212 are provided on the inner wall of the upper end of the valve stem mounting hole 211, forming an arc groove 213 between the two limiting blocks 212, and each protrusion 231 is slidably fitted in the corresponding arc groove 213; when the ball valve unit 2 is in the open state, both protrusions 231 abut against the limiting block 212 at one end of the corresponding arc groove 213, and when the ball valve unit 2 is in the closed state, both protrusions 231 abut against the limiting block 212 at the other end of the corresponding arc groove 213.

[0018] The valve stem 23 has an annular protrusion 232 in the middle. The upper end of the annular protrusion 232 abuts against two limiting blocks 212 to prevent the valve stem 23 from disengaging from the valve stem assembly hole 211 from the inside out. The annular protrusion 232 has an annular groove 233 in the middle of its axial direction. An O-ring 24 is fitted onto the annular groove 233. The O-ring 24 is used to seal the gap between the valve stem 23 and the valve stem assembly hole 211. By adopting this structure, since the upper end of the annular protrusion abuts against the two limiting blocks, the valve stem can be prevented from disengaging from the valve stem assembly hole from the inside out.

[0019] The outer end of the valve stem 23 is provided with a slot 234 in the shape of an "I". By adopting this method, when it is necessary to turn the valve stem, the slot is engaged with the slot, and the valve stem can be turned by the slot. This has the advantage of easy valve stem turning, which also has the advantage of easy opening or closing of the ball valve unit.

[0020] Both ends of the connecting arm 1 are provided with annular expansion portions 11 at the connection points with the outer wall of the valve body assembly 21. By adopting this structure, the connection strength between the connecting arm and the valve body assembly can be improved under the action of the annular expansion portions, so as to avoid the connection between the connecting arm and the valve body assembly from breaking.

[0021] The ball valve unit 2 also includes a sealing gasket 25; the sealing gasket 25 abuts against the outlet end 214 of the valve body assembly 21, and an annular boss 251 is provided on the inner edge of the sealing gasket 25 facing the outlet end 214. The annular boss 251 is inserted into the outlet end 214 and tightly fitted with the inner wall of the outlet end 214. With this structure, when the outlet end is connected to the end of the pipe fitting, the sealing gasket can reliably seal the gap between the outlet end and the end of the pipe fitting. Moreover, by providing an annular boss on the inner edge of the sealing gasket facing the outlet end, the annular boss can be inserted into the outlet end and tightly fitted with the inner wall of the outlet end, thereby allowing the sealing gasket to be pre-installed on the outlet end and preventing the sealing gasket from detaching from the outlet end. At the same time, it can also ensure the coaxiality of the sealing gasket and the outlet end, so that the sealing gasket can reliably achieve circumferential sealing of the gap between the outlet end and the end of the pipe fitting.

[0022] An annular rounded corner surface 252 is provided on the outer peripheral wall of the end of the annular boss 251 away from the sealing gasket 25. The annular rounded corner surface 252 is used to cooperate with the inner wall of the water outlet 214 for guidance so that the annular boss 251 can be inserted into the water outlet 214. With this structure, during the process of inserting the annular boss into the water outlet, the annular rounded corner surface can cooperate with the inner wall of the water outlet for guidance so that the annular boss can be inserted into the water outlet, which can facilitate the assembly of the sealing gasket and the water outlet.

[0023] An annular protrusion 253 is provided on the outer peripheral wall of the annular boss 251, and an annular groove 215 is provided on the inner peripheral wall of the water outlet 214. The annular protrusion 253 and the annular groove 215 are circumferentially fitted. With this structure, after the annular boss is inserted into the water outlet, the annular protrusion can be circumferentially fitted with the annular groove, thereby further preventing the sealing gasket from detaching from the water outlet.

[0024] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An H-valve with a valve stem rotation limiting structure, comprising a connecting arm (1) and two ball valve units (2) arranged in parallel and spaced apart; each ball valve unit (2) includes a valve body assembly (21), a valve core (22) and a valve stem (23), the connecting arm (1) is located between the two ball valve units (2), the two ends of the connecting arm (1) are respectively connected to the outer wall of one of the valve body assemblies (21), each valve stem (23) is rotatably connected in a valve stem mounting hole (211) on the corresponding valve body assembly (21), each valve core (22) is rotatably connected inside the corresponding valve body assembly (21), the inner end of each valve stem (23) is drively connected to the corresponding valve core (22), and the outer end of each valve stem (23) extends out of the valve body assembly (21); characterized in that: Two protrusions (231) are provided on the outer wall of the upper part of the valve stem (23) and are evenly distributed in the circumference. Two limiting blocks (212) are provided on the inner wall of the upper end of the valve stem mounting hole (211) and are evenly distributed in the circumference. An arc groove (213) is formed between the two limiting blocks (212). Each protrusion (231) is slidably fitted in the corresponding arc groove (213). When the ball valve unit (2) is in the open state, the two protrusions (231) abut against the limiting block (212) at one end of the corresponding arc groove (213). When the ball valve unit (2) is in the closed state, the two protrusions (231) abut against the limiting block (212) at the other end of the corresponding arc groove (213).

2. The H-valve with a stem rotation limiting structure according to claim 1, characterized in that: The valve stem (23) has an annular protrusion (232) in the middle. The upper end of the annular protrusion (232) abuts against the two limiting blocks (212) to restrict the valve stem (23) from disengaging from the valve stem assembly hole (211) from the inside to the outside. The annular protrusion (232) has an annular groove (233) in the middle of the axial direction. An O-ring (24) is fitted on the annular groove (233). The O-ring (24) is used to seal the gap between the valve stem (23) and the valve stem assembly hole (211).

3. The H-valve with a stem rotation limiting structure according to claim 1, characterized in that: The valve stem (23) has an "I"-shaped groove (234) on its outer end.

4. The H-valve with a stem rotation limiting structure according to any one of claims 1-3, characterized in that: Both ends of the connecting arm (1) are provided with annular expansion portions (11) at the connection points with the outer wall of the valve body assembly (21).

5. The H-valve with a stem rotation limiting structure according to any one of claims 1-3, characterized in that: The ball valve unit (2) also includes a sealing gasket (25); the sealing gasket (25) abuts against the outlet end (214) of the valve body assembly (21), and an annular boss (251) is provided on the inner edge of the sealing gasket (25) and on the side facing the outlet end (214). The annular boss (251) is inserted into the outlet end (214) and tightly fits the inner wall of the outlet end (214).

6. The H-valve with a stem rotation limiting structure according to claim 5, characterized in that: The annular boss (251) has an annular rounded corner surface (252) on the outer peripheral wall of the end away from the sealing gasket (25). The annular rounded corner surface (252) is used to cooperate with the inner wall of the water outlet (214) for guidance so that the annular boss (251) can be inserted into the water outlet (214).

7. The H-valve with a stem rotation limiting structure according to claim 5, characterized in that: The annular boss (251) has an annular rib (253) on its outer peripheral wall, and the water outlet (214) has an annular groove (215) on its inner peripheral wall. The annular rib (253) and the annular groove (215) are circumferentially fitted together.

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