Dry-type piston valve control stainless steel meter case

Abstract

The utility model provides a dry type piston valve control stainless steel meter case which comprises a case body, two sides of the case body are respectively connected with a water inlet pipe and a water outlet pipe, a control valve and at least three flow guide pipes are arranged in the water outlet pipe, the control valve comprises a valve rod, a ball core and two polytetrafluoroethylene rings, and the number of the flow guide pipes is at least three. Wherein at least one flow guide pipe is located at one end of the ball core close to the shell body, and at least two flow guide pipes are located at one end of the ball core away from the shell body; one end of each flow guide pipe is provided with a mounting groove with the inner diameter matched with the outer diameter of the teflon ring, and the mounting grooves of the two flow guide pipes close to the teflon ring are oppositely arranged, so that the teflon ring is arranged in the mounting grooves. The flow guide pipes are arranged on the two sides of the control valve to guide water flow, impact is avoided, and therefore the purpose of reducing pressure loss is achieved; and meanwhile, the flow guide pipes are the same in shape, and the mounting positions are adjusted by changing the number, so that the flow guide pipes can share the mold, and the production cost is greatly reduced.

Description

Technical Field

[0001] This utility model relates to a water meter housing, and more particularly to a dry piston valve controlled stainless steel housing. Background Technology

[0002] A valve-controlled water meter is a water meter controlled by a valve. Typically, a valve-controlled water meter has a valve seat and valve body installed at the outlet pipe. To ensure the impeller is fully filled, the water typically enters the measuring chamber from below and flows out from the top. When water flows into the outlet pipe from the upper part, the presence of the valve seat can easily cause turbulence, leading to increased pressure loss.

[0003] Especially for welded valve housings, unlike cast valve housings where the housing's shape can create curved flow channels to reduce pressure loss, welded valve housings often have a certain height difference between the measuring chamber outlet and the valve seat. Water flow directly impacts the valve seat end face, resulting in greater turbulence and pressure loss. Therefore, flow guiding components need to be installed on both sides of the control valve. However, existing flow guiding components are often complex in shape, difficult to manufacture and assemble, preventing the development of such products. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] The purpose of this utility model is to provide a stainless steel housing for a dry piston valve, which reduces pressure loss and has a simple structure and is easy to assemble and disassemble. To achieve the above objective, this utility model adopts the following technical solution:

[0006] (II) Technical Solution

[0007] A dry piston valve controlled stainless steel housing includes a housing body, with an inlet pipe and an outlet pipe connected to both sides of the housing body respectively. A control valve is installed inside the outlet pipe. The control valve includes a valve stem, a ball core, and two PTFE rings. The top of the valve stem passes through the outlet pipe, and the bottom is connected to the ball core. The ball core is placed between the two PTFE rings.

[0008] It also includes flow guides, with at least three flow guides, at least one of which is located at the end of the ball core near the shell, and at least two flow guides are located at the end of the ball core away from the shell; one end of each flow guide is provided with an installation groove whose inner diameter matches the outer diameter of the PTFE ring, and the installation grooves of the two flow guides near the PTFE ring are arranged opposite to each other, so that the PTFE ring is placed in the installation groove.

[0009] Furthermore, a positioning ring is provided at the inner end of the water outlet pipe, which abuts against the innermost guide pipe.

[0010] Furthermore, the positioning ring is fixed to the inner end of the water outlet pipe by welding.

[0011] Further, the outer end of the outlet pipe is provided with a locking ring, which is in abutment with the outermost end of the flow guide pipe.

[0012] Further, the locking ring is connected to the inner wall of the outlet pipe through screw thread.

[0013] Further, the central hole of the locking ring is hexagonal.

[0014] Further, the outer periphery of the flow guide pipe is provided with a plurality of positioning protrusions.

[0015] Further, the outer periphery of the flow guide pipe is provided with a sealing groove, and sealing rings are arranged between the flow guide pipe and the four-fluorine ring and in the sealing groove.

[0016] Further, the end of the flow guide pipe away from the mounting groove is provided with a sealing groove, and a sealing ring is arranged in the sealing groove.

[0017] (Three) beneficial effects

[0018] Compared with the prior art, the utility model has obvious advantages and beneficial effects, specifically, the flow guide pipes are arranged on both sides of the control valve, water flow is guided, impact is avoided, and the purpose of reducing pressure loss is achieved; meanwhile, the shapes of the flow guide pipes are same, the adjustment of the installation positions is realized through the change of the number, the flow guide pipes can share the mold, and the production cost is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] The utility model will be further described below in combination with the embodiments with reference to the drawings.

[0020] Figure 1 is the cross-sectional schematic view of the utility model;

[0021] Figure 2 is the outer shape structure schematic view of the flow guide pipe;

[0022] Figure 3 is the outer shape structure schematic view of the locking ring.

[0023] Explanation of reference numerals:

[0024] 1, shell body; 2, inlet pipe; 3, outlet pipe;

[0025] 4, valve stem; 5, ball core; 6, four-fluorine ring;

[0026] 7, flow guide pipe; 71, sealing groove; 72, mounting groove;

[0027] 73, positioning protrusion; 8, positioning ring; 9, locking ring. DETAILED DESCRIPTION

[0028] The embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary, and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0029] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0030] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0031] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] The present application is further described below in conjunction with the drawings and specific embodiments.

[0033] Please refer to Figures 1 to 3 As shown in the drawings, a dry piston valve control stainless steel watch case, comprising a case body 1, the case body 1 two sides are connected with water inlet pipe 2 and water outlet pipe 3 respectively, wherein:

[0034] The control valve is installed in the water outlet pipe 3, wherein the control valve comprises a valve rod 4, a ball core 5 and two tetrafluoro rings 6, the valve rod 4 penetrates the water outlet pipe 3 at the top and is connected with the ball core 5 at the bottom, and the ball core 5 is arranged between the two tetrafluoro rings 6;

[0035] As Figure 1It also includes a flow guide tube 7, and the number of flow guide tubes 7 is at least three, of which at least one flow guide tube 7 is located on the side of the ball core 5 close to the shell 1, and at least two flow guide tubes 7 are located on the side of the ball core 5 away from the shell 1; one end of the flow guide tube 7 is provided with an installation groove 72 whose inner diameter matches the outer diameter of the PTFE ring 6, and the installation grooves 72 of the two flow guide tubes 7 close to the PTFE ring 6 are arranged opposite to each other, so that the PTFE ring 6 is placed in the installation groove 72.

[0036] Through the above technical solution, guide pipes 7 are set on both sides of the control valve to guide the water flow and avoid impact, thereby achieving the purpose of reducing pressure loss; at the same time, all guide pipes 7 have the same shape, and the installation position can be adjusted by changing the number, so that all guide pipes 7 can share the same mold, which greatly reduces the production cost.

[0037] It should be added that, in order to fix the position of the guide tube 7, such as Figure 1 The inner end of the outlet pipe 3 is provided with a positioning ring 8, which abuts against the innermost guide pipe 7. At the same time, the outer end of the outlet pipe 3 is provided with a locking ring 9, which abuts against the outermost guide pipe 7. The positions of the two ends of the guide pipe 7 are determined by the positioning ring 8 and the locking ring 9, thereby ensuring that it fits tightly with the valve seat 6 and the control valve operates normally.

[0038] It is worth mentioning that, given the installation sequence of each guide pipe 7 from the inside to the outside, the positioning ring 8 is fixed to the inner end of the water outlet pipe 3 by welding, while the locking ring 9 is connected to the inner wall of the water outlet pipe 3 by thread, which facilitates disassembly later.

[0039] Furthermore, such as Figure 3 The center hole of the locking ring 9 is hexagonal, making it easy to tighten with a wrench.

[0040] Please refer to this again. Figure 2 The outer periphery of the guide pipe 7 is provided with several positioning protrusions 73. These positioning protrusions 73 can leave a certain gap between the outer wall of the guide pipe 7 and the inner wall of the inlet and outlet water pipes, reducing the difficulty of assembly. At the same time, the design of the protrusions can center the guide pipe 7, avoiding assembly errors caused by simply increasing the gap.

[0041] It is understandable that, in order to increase the sealing performance, a sealing groove 71 is provided on the outer periphery of the guide tube 7, and a sealing ring is provided between the PTFE ring 6 and the guide tube 7 and in the sealing groove 72. At the same time, a sealing groove 71 is provided at the end of the guide tube 7 away from the mounting groove 72, and a sealing ring is provided in the sealing groove 71.

[0042] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A dry-type piston valve controlled stainless steel watch case, comprising a case body (1), wherein an inlet pipe (2) and an outlet pipe (3) are respectively connected to both sides of the case body (1), and a control valve is installed inside the outlet pipe (3), characterized in that: The control valve includes a valve stem (4), a ball core (5) and two PTFE rings (6). The top of the valve stem (4) passes through the outlet pipe (3) and the bottom is connected to the ball core (5). The ball core (5) is placed between the two PTFE rings (6). It also includes a flow guide tube (7), the number of which is at least three, wherein at least one flow guide tube (7) is located on the side of the ball core (5) close to the shell (1), and at least two flow guide tubes (7) are located on the side of the ball core (5) away from the shell (1); one end of the flow guide tube (7) is provided with an installation groove (72) whose inner diameter matches the outer diameter of the PTFE ring (6), and the installation grooves (72) of the two flow guide tubes (7) close to the PTFE ring (6) are arranged opposite to each other, so that the PTFE ring (6) is placed in the installation groove (72).

2. The dry piston valve controlled stainless steel housing according to claim 1, characterized in that: The water outlet pipe (3) is provided with a positioning ring (8) at its inner end, which abuts against the innermost guide pipe (7).

3. The dry piston valve controlled stainless steel housing according to claim 2, characterized in that: The positioning ring (8) is fixed to the inner end of the water outlet pipe (3) by welding.

4. The dry piston valve controlled stainless steel housing according to claim 1, characterized in that: The outer end of the water outlet pipe (3) is provided with a locking ring (9), which abuts against the outermost guide pipe (7).

5. The dry piston valve controlled stainless steel housing according to claim 4, characterized in that: The locking ring (9) is threadedly connected to the inner wall of the water outlet pipe (3).

6. The dry piston valve controlled stainless steel housing according to claim 4, characterized in that: The central hole of the locking ring (9) is hexagonal.

7. The dry piston valve controlled stainless steel housing according to claim 1, characterized in that: The outer periphery of the guide tube (7) is provided with several positioning protrusions (73).

8. The dry piston valve controlled stainless steel housing according to claim 1, characterized in that: The outer periphery of the guide tube (7) is provided with a sealing groove (71), and sealing rings are provided between the PTFE ring (6) and the guide tube (7) and inside the sealing groove (71).

9. The dry piston valve controlled stainless steel housing according to claim 1, characterized in that: The end of the guide pipe (7) away from the mounting groove (72) is provided with a sealing groove (71), and a sealing ring is provided in the sealing groove (71).

Images