Roots flowmeter valve structure

Abstract

This utility model provides a valve structure for a Roots flow meter, comprising a valve body section, a gasket ring, a valve ball washer, a valve ball, a valve stem, a valve ball support, a valve ball bottom plug, a bottom plug end cap, an upper controller housing, a geared motor, a lower controller housing, a coupling, and a sealing ring. The valve ball support is fixed to the valve ball with screws. A positioning step is provided inside the air inlet end of the valve body section. The valve ball washer is inserted from the air inlet end into the positioning step inside the valve body section, and when tightened, it cooperates with the valve ball to achieve a seal. The gasket ring has two ends... All components are fitted with rubber sealing rings; the gasket pressure ring is threaded to the valve body pipe section, pressing the valve ball gasket to the positioning step inside the valve body pipe section; this utility model is convenient to process, assemble, and maintain; while ensuring performance, the valve plate and annular bracket are used to optimize the processing and assembly processes, reducing costs; it has good sealing performance, reliably preventing internal and external leakage of the medium; the valve ball and PTFE gasket cooperate to achieve a tight seal, which is more effective in preventing internal leakage compared to valve structures with springs; multiple seals at the valve stem effectively prevent external leakage.

Description

Technical Field

[0001] This utility model relates to the field of valves, and more specifically to a Roots flow meter valve structure. Background Technology

[0002] A Roots flow meter is a positive displacement flow meter. Internally, it has a metering chamber with a defined volume. Using mechanical measuring elements, it continuously divides the fluid into individual, known volume portions. The total flow volume is measured by the number of times the metering chamber is repeatedly filled and discharged. Roots flow meters are suitable for measuring the flow of various liquids and gases, especially gases. Gas Roots flow meters are high-precision, highly reliable, and wide-range positive displacement gas metering instruments, widely used in industrial gas flow detection and control, urban gas detection and metering, and other fields, meeting users' requirements for high-precision and high-reliability detection or metering.

[0003] Typically, Roots flow meters are installed in conjunction with valve controllers. Placing the flow meter before the valve controller reduces measurement errors, protects the measuring equipment, and facilitates maintenance. Ball valves are widely used in gas control systems. They are simple in structure, easy to operate, and do not accumulate ice at low temperatures; ball valves can provide a complete seal, ensuring no gas leakage. Summary of the Invention

[0004] The purpose of this invention is to provide a valve controller structure that works with a Roots flow meter, which is easy to process, assemble, and maintain. While ensuring performance, the valve plate and ring bracket are used to optimize the processing and assembly processes, reducing costs. It has good sealing performance, reliably preventing internal and external leakage of the medium. The valve ball and PTFE gasket work together to achieve a tight seal, which is more effective in preventing internal leakage compared to valve structures with springs. Multiple seals at the valve stem effectively prevent external leakage.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] The Roots flow meter valve structure includes a valve body section, gasket ring, valve ball washer, valve ball, valve stem, valve ball support, valve ball bottom plug, bottom plug end cap, controller upper housing, geared motor, controller lower housing, coupling, and sealing ring. Its characteristics are:

[0007] The valve ball bracket is fixed to the valve ball by screws;

[0008] The valve body pipe section has a positioning step inside the air inlet end;

[0009] The valve ball gasket is inserted from the air inlet end into the positioning step inside the valve body pipe section. When tightened, it cooperates with the valve ball to achieve a seal.

[0010] Both ends of the gasket pressure ring are fitted with rubber sealing rings;

[0011] The gasket pressure ring is connected to the valve body pipe section by a thread, pressing the valve ball gasket to the positioning step provided inside the valve body pipe section;

[0012] The lower end of the valve ball bracket is connected to the bottom plug of the valve ball, and a PTFE gasket is provided between the two.

[0013] The bottom plug end cap is fixed to the bottom plug of the valve ball by screws, and rubber sealing rings are installed on the plug shaft diameter and shaft shoulder respectively;

[0014] The upper end of the valve ball bracket is connected to the valve stem;

[0015] Multiple rubber sealing rings are provided between the valve stem and the valve body pipe section;

[0016] The lower housing of the controller is connected to the valve body pipe section by screws;

[0017] The upper end of the coupling is connected to the geared motor, and the lower end is connected to the valve stem.

[0018] The geared motor is located inside the lower housing, and a rubber sealing ring is provided between the two.

[0019] The upper housing and the lower housing of the controller are fixedly connected by screws, and a rubber sealing ring is provided between them.

[0020] The beneficial effects of this utility model are:

[0021] (1) The valve structure of the Roots flow meter of this utility model is simple and easy to process, assemble and maintain.

[0022] (2) The valve structure of the Roots flow meter of this utility model optimizes the processing and assembly process by using valve plate and ring bracket to reduce costs while ensuring performance.

[0023] (3) The valve structure of this utility model of the Roots flow meter has good sealing performance and reliably prevents internal and external leakage of the medium. The valve ball and the PTFE gasket fit together to achieve a tight seal, which is more effective in preventing internal leakage than the valve structure with a spring; the valve stem has multiple seals to effectively prevent external leakage.

[0024] (4) The valve structure of the Roots flow meter of this utility model has high strength performance, and the shell has excellent compressive strength and the valve stem has excellent bending resistance.

[0025] (5) The valve structure of the Roots flow meter of this utility model has strong durability: the structure is simple and reliable, and it maintains sealing performance efficiently throughout its life cycle. Attached Figure Description

[0026] AppendixFigure 1 This is a cross-sectional view of the valve structure of the Roots flow meter of this utility model. Detailed Implementation

[0027] The technical solution of this utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0028] As attached Figure 1 As shown: The valve structure of the Roots flow meter includes a valve body section (1), a gasket pressure ring (3), a valve ball gasket (5), a valve ball (6), a valve stem (14), a valve ball bracket (13), a valve ball bottom plug (9), a bottom plug end cap (8), a controller upper housing (23), a geared motor (22), a controller lower housing (18), a coupling (17), and a sealing ring.

[0029] The valve ball bracket and the valve ball are fixed together by screws. Specifically, the valve ball bracket and the valve ball are connected and fixed by internal hexagon screws (7).

[0030] The valve body pipe section has a positioning step inside the air inlet end. Specifically, the valve ball gasket is inserted from the air inlet end of the valve body pipe section into the positioning step inside the valve body pipe section. When tightened, it cooperates with the valve ball to achieve a seal. The valve ball gasket is made of polytetrafluoroethylene.

[0031] Both ends of the gasket are fitted with rubber sealing rings. Specifically, one end of the gasket is a groove structure, and the rubber sealing ring (4) is fitted in this groove structure; the other end can be directly fitted with a rubber sealing ring (2). The gasket is threaded to the valve body pipe section, and the valve ball gasket is pressed to the positioning step inside the valve body pipe section. When it is tightened, it cooperates with the valve ball to achieve a seal. Compared with the valve structure with spring, it is more effective in preventing internal leakage.

[0032] The lower end of the valve ball bracket is connected to the bottom plug of the valve ball, and a PTFE gasket (12) is provided between the two. The bottom plug end cap is fixed to the bottom plug of the valve ball by screws. In order to ensure sealing performance, rubber sealing rings (10) and (11) are installed on the plug shaft diameter and shaft shoulder respectively.

[0033] The upper end of the valve ball bracket is connected to the valve stem, and multiple rubber sealing rings (15) are provided between the valve stem and the valve body pipe section to prevent external leakage;

[0034] The lower housing of the controller is connected to the valve body pipe section by screws (16).

[0035] The upper end of the coupling is connected to the geared motor, and the lower end is connected to the valve stem.

[0036] The geared motor is located inside the lower housing, and a rubber sealing ring (19) is provided between the two.

[0037] The upper housing and the lower housing of the controller are fixedly connected by screws (20), and a rubber sealing ring (21) is provided between them.

[0038] The assembly process of this utility model is as follows:

[0039] Step 1: Connect and fix the valve ball bracket to the valve ball using hex screws.

[0040] Step 2: Insert the assembled valve ball bracket and valve ball into the air inlet end of the valve body pipe section. Connect the upper end to the valve stem and the lower end to the bottom plug of the valve ball. Place a PTFE gasket between the two.

[0041] Step 3: Secure the bottom plug end cap to the bottom plug of the valve ball with screws, and install rubber sealing rings on the plug shaft diameter and shaft shoulder respectively.

[0042] Step 4: Insert the valve ball washer from the air inlet end of the valve body pipe section into the positioning step inside the valve body pipe section.

[0043] Step 5: Rubber sealing rings are fitted on both ends of the gasket pressure ring. The valve body pipe section is connected to the air inlet end of the valve body pipe section by thread, and the valve ball gasket is pressed tightly.

[0044] Step 6: Fit the coupling onto the square-head valve stem at the top of the valve, fix the geared motor to the lower housing of the controller, align the motor shaft with the coupling hole, and connect the lower housing of the controller to the valve body pipe section with screws.

[0045] Step 7: The upper housing and lower housing of the controller are fixedly connected by screws, and a rubber sealing ring is placed between them.

Claims

1. The valve structure of the Roots flow meter includes a valve body section, gasket pressure ring, valve ball washer, valve ball, valve stem, valve ball support, valve ball bottom plug, bottom plug end cover, controller upper housing, geared motor, controller lower housing, coupling, and sealing ring. Its characteristics are: The valve ball bracket is fixed to the valve ball by screws; The valve body pipe section has a positioning step inside the air inlet end; The valve ball gasket is inserted from the air inlet end into the positioning step inside the valve body pipe section. When tightened, it cooperates with the valve ball to achieve a seal. Both ends of the gasket pressure ring are fitted with rubber sealing rings; The gasket pressure ring is connected to the valve body pipe section by a thread, pressing the valve ball gasket to the positioning step provided inside the valve body pipe section; The lower end of the valve ball bracket is connected to the bottom plug of the valve ball, and a PTFE gasket is provided between the two. The bottom plug end cap is fixed to the bottom plug of the valve ball by screws, and rubber sealing rings are installed on the plug shaft diameter and shaft shoulder respectively; The upper end of the valve ball bracket is connected to the valve stem; Multiple rubber sealing rings are provided between the valve stem and the valve body pipe section; The lower housing of the controller is connected to the valve body pipe section by screws; The upper end of the coupling is connected to the geared motor, and the lower end is connected to the valve stem. The geared motor is located inside the lower housing, and a rubber sealing ring is provided between the two. The upper housing and the lower housing of the controller are fixedly connected by screws, and a rubber sealing ring is provided between them.

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