A bimetallic thermometer for valves

Abstract

The utility model provides a bimetallic thermometer for a valve, a bimetallic thermometer for a valve, comprising a meter head, a temperature sensing element connected to the center of the meter head, a fixing structure for fixing the temperature sensing element with the valve, and a tapered thread arranged on the outer periphery of the fixing structure. Compared with the prior art, the utility model provides a tapered thread on the outside of the fixing structure, so that sealing can be achieved by simply tightening, without the need for sealing with a sealing ring, and is easy to operate; the meter head and the temperature sensing element are welded in one piece, which increases the connection strength, and the meter head can be directly screwed to avoid damage to the thermometer when screwing the meter head, thereby affecting the sealing of the thermometer.

Description

Technical Field

[0001] The utility model belongs to the field of instruments, and in particular relates to a bimetallic thermometer for a valve. Background Art

[0002] The bimetallic thermometer uses a spirally wound hot bimetallic strip as a temperature sensing device and installs it in a protective sleeve. One end is fixed, called the fixed end, and the other end is connected to a thin shaft, called the free end. A pointer is installed on the free end spool. When the temperature changes, the free end of the temperature sensing device rotates, causing the pointer on the thin shaft to change its angle, indicating the corresponding temperature on the dial. When the bimetallic thermometer is installed on a valve, it usually needs to be sealed, and the sealing needs to be sealed with a sealing ring, which is more complicated to operate. In addition, the space inside the valve is small, the available length of the temperature-sensitive metal is short, and the measurement accuracy is low. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a bimetallic thermometer for a valve.

[0004] The purpose of the utility model is achieved in the following way: a bimetallic thermometer for a valve comprises a meter head 1, the center of the meter head 1 is connected to a temperature sensing element 2, a fixing structure 3 for fixing connection with the valve is arranged outside the temperature sensing element 2, and a tapered thread 31 is arranged on the periphery of the fixing structure 3.

[0005] In the bimetallic thermometer for a valve, the meter head 1 and the fixed structure 3 are connected by an integrated welding structure.

[0006] In the bimetallic thermometer for a valve, a hollow structure 32 is provided between the temperature sensing element 2 and the fixed structure 3 .

[0007] In the bimetallic thermometer for a valve, the top cross-section of the fixing structure 3 is a regular hexagon.

[0008] Compared with the prior art, the utility model provides a tapered thread outside the fixed structure, and sealing can be achieved by simply tightening, without the need for a sealing ring, and is easy to operate; the meter head and the temperature sensing element are welded as one piece, which increases the connection strength, and the meter head can be directly screwed to avoid damage to the thermometer when screwing the meter head, thereby affecting the sealing of the thermometer. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of the utility model;

[0010] Figure 2 This is a cross-sectional view of the utility model;

[0011] Figure 3 This is a schematic diagram of the table header.

[0012] 1 meter head, 2 temperature sensing element, 3 fixed structure, 31 tapered thread, 32 hollow structure. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0014] In the present utility model, unless otherwise expressly specified and limited, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0015] like Figure 1-2 As shown, a bimetallic thermometer for a valve includes a meter head 1, wherein the center of the meter head 1 is connected to a temperature sensing element 2, a fixing structure 3 for fixing the temperature sensing element 2 with the valve is arranged outside, and a tapered thread 31 is arranged outside the fixing structure 3. A tapered internal thread matching the tapered thread 31 is arranged on the valve. The tapered thread is also called a dry sealing thread, which means that it can be sealed by directly tightening without any filler. There are two main reasons why it has sealing characteristics: 1. Due to the taper, this thread has a "self-tightening effect" when matching with the same tapered thread or cylindrical thread; 2. Its special tooth shape design has the characteristic of "complete fit", unlike ordinary metric threads, which have a gap between the top and bottom of the teeth. Therefore, the thermometer of the utility model only needs to manually tighten the tapered thread 31 outside the fixing structure 3 to achieve the sealing requirement.

[0016] In the bimetallic thermometer for a valve, the meter head 1 and the fixed structure 3 are integrally welded. If the meter head is held to be tightened or loosened, a circumferential force will be generated between the meter head 1 and the fixed structure 3, causing damage to the thermometer and affecting the measurement. To prevent such problems, the meter head 1 and the fixed structure 3 are integrally welded to enhance the strength of the connection, reduce the influence of the circumferential force, and prevent the thermometer from being damaged.

[0017] In the bimetallic thermometer for a valve, a hollow structure 32 is provided between the temperature sensing element 2 and the fixed structure 3. The hollow structure 32 is hollowed out upward from the bottom surface of the inner circle of the fixed structure 3, so that part of the temperature sensing element is exposed from the fixed structure 3 and can contact with the temperature sensing medium, so that the temperature sensing element in the hollow part can also be measured, which increases the length of the measurable part and makes the measurement effect of the thermometer more accurate.

[0018] In the bimetallic thermometer for a valve, the top cross section of the fixing structure 3 is a regular hexagon. The regular hexagonal structure can be used with a wrench. After tightening the tapered thread 31 by holding the meter head 1, the wrench can be used to further tighten it to achieve a better sealing effect. When removing the thermometer, the wrench can also be used to loosen the thread a little, and then the thermometer can be unscrewed by holding the meter head.

[0019] The above is only a preferred embodiment of the present invention. It should be pointed out that those skilled in the art can make several changes and improvements without departing from the overall concept of the present invention, and these should also be regarded as the protection scope of the present invention.

Claims

1. A bimetallic thermometer for a valve, comprising a meter head (1), wherein the center of the meter head (1) is connected to a temperature sensing element (2), characterized in that: A fixing structure (3) for fixedly connecting to a valve is arranged outside the temperature sensing element (2), and a tapered thread (31) is arranged on the outer periphery of the fixing structure (3).

2. A bimetallic thermometer for a valve as claimed in claim 1, characterized in that: The meter head (1) and the fixed structure (3) are connected by an integrated welding structure.

3. A bimetallic thermometer for a valve as claimed in claim 2, characterized in that: A hollow structure (32) is provided between the temperature sensing element (2) and the fixed structure (3).

4. A bimetallic thermometer for a valve as claimed in claim 3, characterized in that: The top cross-section of the fixed structure (3) is a regular hexagon.

Images