Throttle valve gland anti-loose structure

Abstract

The utility model discloses a throttle valve gland anti-loosening structure, which comprises a valve rod, a gland, a pin shaft and an outer sliding sleeve, the outer part of the bottom end of the valve rod is movably connected with the gland, the gland is connected on the outer sliding sleeve through threads, and the pin shaft is inserted and fixed at the top end of the outer sliding sleeve on one side of the gland. According to the utility model, the local part of the valve is improved, the two pin shafts are symmetrically arranged on the outer sliding sleeve, and the pin shafts are in spot welding connection with the gland, so that the problem that the outer sliding sleeve made of a tungsten steel material does not have weldability can be solved, the gland can be prevented from loosening in the rotating process of the valve rod, and the valve is simple and reasonable in structure, low in manufacturing cost and high in practicability.

Description

Technical Field

[0001] The utility model relates to a throttle valve, in particular to a throttle valve gland anti-loosening structure. Background Art

[0002] As a kind of control valve, the throttle valve is widely used in practice. After the throttle valve stem is installed in the outer sleeve, it is screwed to the outer sleeve by the gland. The gland and the outer sleeve are spot welded to prevent loosening, which is simple and effective. However, in some special cases, the outer sleeve is made of tungsten steel, so the gland and the outer sleeve cannot be spot welded, because tungsten steel is not weldable. Therefore, we propose a throttle valve gland anti-loosening structure. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a throttle valve gland anti-loosening structure, which solves the problem that the outer sliding sleeve on the valve is made of tungsten steel, the gland and the outer sliding sleeve cannot be spot welded, and the gland cannot be anti-rotated.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a throttle valve gland anti-loosening structure, including a valve stem, a gland, a pin and an outer sleeve, the bottom end of the valve stem is movably connected to the gland, the gland is connected to the outer sleeve by threads, and the top end of the outer sleeve is located on one side of the gland and is plugged and fixed with a pin.

[0005] Based on the above solution, the valve stem and the gland are rotationally matched.

[0006] Based on the above solution, two pin shafts are symmetrically provided, and the top ends of the two pin shafts are respectively welded to the pressure cover by spot welding.

[0007] Compared with the prior art, the utility model has the following beneficial effects: a throttle valve gland anti-loosening structure, which improves the local part of the valve, symmetrically arranges two pins on the outer sliding sleeve, and spot-welds the pins to the gland, which can solve the problem that the outer sliding sleeve made of tungsten steel material is not weldable, and can prevent the gland from loosening during the rotation of the valve stem. The utility model has a simple and reasonable structure, low manufacturing cost and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a structural schematic diagram of a throttle valve gland anti-loosening structure of the utility model;

[0009] Figure 2 For this utility model Figure 1 Schematic diagram of the partially enlarged structure.

[0010] The numbers in the figure are: 1-valve stem, 2-pressure cover, 3-pin shaft, 4-outer sleeve. DETAILED DESCRIPTION

[0011] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0012] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0013] Reference Figure 1 to Figure 2 It can be seen that: a throttle valve gland anti-loosening structure includes a valve stem 1, a gland 2, a pin 3 and an outer sleeve 4, the bottom end of the valve stem 1 is externally movably connected with a gland 2, the gland 2 is connected to the outer sleeve 4 by threads, the top of the outer sleeve 4 is located on one side of the gland 2 and is plugged and fixed with a pin 3, and punching a hole on the outer sleeve 4 to plug and install the pin 3 can solve the problem that tungsten steel material cannot be welded.

[0014] The valve stem 1 and the gland 2 are rotationally matched to facilitate the valve stem 1 to rotate in the gland 2 when in use; two pin shafts 3 are symmetrically provided, and the top ends of the two pin shafts 3 are spot welded to the gland 2 respectively. After the pin shaft 3 and the gland 2 are spot welded, the gland 2 can be prevented from loosening.

[0015] The principles and advantages of the utility model: a throttle valve gland anti-loosening structure adopts a new structure, improves the local part of the valve, symmetrically arranges two pins 3 on the outer sliding sleeve 4, and the pins 3 are spot-welded to the gland 2, which can solve the problem that the outer sliding sleeve 4 made of tungsten steel material is not weldable, and can prevent the gland 2 from loosening during the rotation of the valve stem 1. The utility model has a simple and reasonable structure, low production cost and strong practicality.

[0016] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A throttle valve gland anti-loosening structure, comprising a valve stem (1), a gland (2), a pin (3) and an outer sleeve (4), characterized in that: The bottom end of the valve stem (1) is externally movably connected to a gland (2), the gland (2) is threadedly connected to an outer sleeve (4), and a pin shaft (3) is inserted and fixed at the top end of the outer sleeve (4) on one side of the gland (2).

2. The throttle valve gland anti-loosening structure according to claim 1, characterized in that: The valve stem (1) and the gland (2) are rotationally matched.

3. The throttle valve gland anti-loosening structure according to claim 1, characterized in that: Two pin shafts (3) are symmetrically provided, and the top ends of the two pin shafts (3) are respectively welded to the pressure cover (2) by spot welding.

Images