WO2021008468A1

WO2021008468A1 - Anti-scaling spool

Info

Publication number: WO2021008468A1
Application number: PCT/CN2020/101524
Authority: WO
Inventors: 杨洪伟; 胡渡; 林曰赞
Original assignee: 浙江达柏林阀门有限公司
Priority date: 2019-07-12
Filing date: 2020-07-11
Publication date: 2021-01-21
Also published as: CN210318792U

Abstract

An anti-scaling spool, belonging to the technical field of spools. The anti-scaling spool comprises a cylindrical housing (1) having a cavity and a spool rod (2) passing through the cylindrical housing (1) and capable of moving axially along the cylindrical housing (1). A lower end of the spool rod (2) extends out of a lower end of the cylindrical housing (1). A waterproof jacket (3) made from an elastic sealing material is connected between the lower end of the spool rod (2) and the lower end of the cylindrical housing (1). The waterproof jacket (3) comprises, sequentially from top to bottom, a sleeving section (31) and a telescopic section (32). A positioning head (11) is provided at the lower end of the cylindrical housing (1). The positioning head (11) is columnar, and the sleeving section (31) is sleeved outside the positioning head (11). A fastening sleeve (4) for fastening the sleeving section (31) and the positioning head (11) to each other is provided outside the sleeving section (31). A lower end of the telescopic section (32) is fixed at the lower end of the spool rod (2). A cavity (12) is provided at a lower end surface of the cylindrical housing (1). A position-limiting ring (5) is provided outside the fastening sleeve (4). An annular anti-escaping portion (41) is provided at an upper end of the fastening sleeve (4). In the anti-scaling spool, the fastening sleeve (4) is prevented from escaping, and the waterproof jacket (3) is firmly connected, thereby ensuring structural reliability and extending service life.

Description

Anti-scale valve core

Technical field

The utility model belongs to the technical field of valve cores, and relates to a scale waterproof valve core.

Background technique

With the increasing maturity of heating technology, anti-fouling valves are widely used in central heating and independent heating to solve the problem of inflexible adjustment or jamming caused by conventional valve cores that easily generate scale. For example, a cut-off type membrane anti-fouling valve core and its valve disclosed in the Chinese Patent Application No. 201610043916.4 include a valve core body, the outer side of the valve core body is provided with an external thread part, and the top of the valve core body is provided with a The matching valve cover has a cylindrical valve stem through the inner cavity of the valve core body. The valve stem is sleeved with a return spring. The lower end of the valve core body is provided with an annular body. The valve stem is located at the lower end of the valve core body. There is an annular groove, which also includes a sealing sleeve film with through holes at both ends and in the shape of an inverted bottle. The lower end of the sealing sleeve film and the annular groove of the valve stem are interference fit to achieve a fixed seal. The upper end sleeve of the sealing sleeve film The outer diameter of the annular body of the valve core body is fixed and sealed by a fixed limit ring. When the valve stem is moving, the sealing sleeve film is driven to shrink and expand, so that the valve stem will not directly contact with the water medium, thereby preventing the generation of scale on the valve stem.

However, the above-mentioned cut-off sleeve film anti-fouling valve core also has some shortcomings: the sealing sleeve film is only fixed by a fixed limit ring, and the valve stem will pull the sealing sleeve film and cause it to Elongation, the pulling force will also act on the fixed limit ring through the sealing sleeve film. As the use time increases, it is easy to cause looseness between the fixed limit ring and the sealing sleeve film, resulting in a decrease in the reliability of the anti-fouling function. The service life of the spool becomes shorter.

Summary of the invention

The purpose of the utility model is to solve the above-mentioned problems in the prior art and propose a scale-proof valve core. The technical problem to be solved is how to ensure the reliability of the structure and prolong the service life.

The purpose of the utility model can be achieved through the following technical solutions:

An anti-fouling valve core, comprising a cylindrical shell with a cavity and a core rod penetrated in the cylindrical shell and capable of moving axially along the cylindrical shell, the lower end of the core rod extends out of the cylindrical shell A waterproof sleeve made of elastic sealing material is connected between the lower end of the core rod and the lower end of the cylindrical shell. The waterproof sleeve includes a sleeve section and a telescopic section from top to bottom. The sleeve section is straight and cylindrical. The lower end of the shell is provided with a positioning head, the positioning head is cylindrical and the sleeve section is sleeved outside the positioning head, the sleeve section is provided with a ferrule that fixes the sleeve section and the positioning head, and the lower end of the telescopic section is fixed at the lower end of the core rod , Characterized in that the lower end surface of the cylindrical shell is provided with a cavity, the positioning head is located at the center of the top wall of the cavity, the positioning head protrudes out of the lower end surface of the cylindrical shell, and the ferrule is provided with a limiting ring to restrict The position ring is located in the cavity, the inner circumference of the cavity is provided with an annular groove, the outer edge of the limit ring is located in the annular groove, the upper end of the ferrule is provided with an annular anti-drop part, and the annular anti-drop part abuts against the limit ring The upper surface of the inner edge.

The anti-scaling valve core uses a ferrule to fix the sleeve section of the waterproof sleeve and the positioning head of the cylindrical shell. At the same time, a limit ring is arranged outside the ferrule, and the annular anti-falling part at the upper end of the ferrule abuts against the limit. The inner edge of the ring is along the upper surface, and the outer edge of the limit ring is located in the annular groove of the cavity on the lower end of the cylindrical shell. The annular groove prevents the limit ring from coming out of the cavity, so that the limit ring can be aligned. The ring-shaped anti-dropping part forms a barrier, so that the ferrule cannot be released from the cavity. Through the cooperation of the stop ring and the annular groove and the cooperation of the stop ring and the annular anti-drop part, the locking sleeve is prevented from falling off, thereby improving the connection firmness of the waterproof sleeve and ensuring the reliability of the structure.

In the above-mentioned anti-fouling valve core, the vertical section of the limit ring is circular, the upper port of the ferrule expands to form a ring-shaped anti-falling part, and the connection between the annular anti-falling part and the outer peripheral surface of the ferrule Transition in a circular arc.

The vertical section of the limit ring is circular, and the connection between the ring-shaped anti-falling part and the outer peripheral surface of the ferrule is set to be in an arc transition, which can better match the shape of the limit ring and improve the limit The positioning effect of the ring on the ferrule makes the ferrule more difficult to fall off.

In the above-mentioned anti-scale valve core, the telescopic section is in a corrugated tube shape.

The telescopic section is in a corrugated tube shape, and the telescopic section can be deformed by its own corrugated shape when moving with the core rod, so that no downward pulling force is generated on the sleeve section, and the connection firmness of the waterproof jacket is further improved.

In the above-mentioned anti-scale valve core, the mouth of the cavity is provided with an outwardly expanding relief groove.

The opening of the cavity is provided with an expanded relief groove, mainly to facilitate the installation of the limiting ring into the cavity during assembly.

In the aforementioned anti-scale valve core, the ferrule and the limit ring are made of stainless steel.

Both the ferrule and the limit ring are made of stainless steel, so that the ferrule and the limit ring are not easily deformed by stress.

Compared with the prior art, the anti-scaling valve core uses a ferrule to fix the waterproof sleeve. By setting a limit ring outside the ferrule, the limit ring and the annular groove are matched, and the limit ring and the annular anti The fit of the detachment part plays a role in preventing the ferrule from falling off, thereby improving the connection firmness of the waterproof case and ensuring the reliability of the structure.

Description of the drawings

Figure 1 is a cross-sectional view of the anti-scale valve core.

Fig. 2 is an enlarged view of A in Fig. 1.

In the figure, 1. Cylindrical shell; 11. Positioning head; 12. Concavity; 121, Annular groove; 122, Recessing groove; 2. Core rod; 3. Waterproof cover; 31, Socket section; 32, Telescopic Section; 4. ferrule; 41, ring-shaped anti-drop part; 5. limit ring; 6. return spring; 7. sealing gasket; 8. sealing ring.

Detailed ways

The following are specific embodiments of the present utility model combined with the accompanying drawings to further describe the technical solution of the present utility model, but the present utility model is not limited to these embodiments.

As shown in Figure 1, an anti-fouling valve core includes a cylindrical shell 1 with a cavity and a core rod 2 that penetrates the cylindrical shell 1 and can move along the axial direction of the cylindrical shell 1 , The upper end of the core rod 2 extends out of the upper end of the cylindrical shell 1, the core rod 2 located in the cylindrical shell 1 is sleeved with a return spring 6, and the two ends of the return spring 6 respectively abut against the core rod 2 and the inner wall of the cavity , The core rod 2 always has a tendency to move upward under the elastic force of the return spring 6. The lower end of the core rod 2 extends out of the lower end of the cylindrical shell 1, and a sealing gasket 7 is fixedly connected to the lower end of the core rod 2.

As shown in Figs. 1 and 2, a waterproof jacket 3 made of an elastic sealing material is connected between the lower end of the core rod 2 and the lower end of the cylindrical shell 1, and the elastic sealing material is specifically silicone rubber. The waterproof jacket 3 includes a sleeve section 31 and a telescopic section 32 in turn from top to bottom. The sleeve section 31 is in a straight cylindrical shape, the telescopic section 32 is in a corrugated tube shape, and the lower end of the cylindrical shell 1 is provided with a positioning head 11, which is cylindrical. , The core rod 2 passes through the positioning head 11, a sealing ring 8 is provided between the core rod 2 and the positioning head 11, the sleeve section 31 is sleeved outside the positioning head 11, and the sleeve section 31 is provided with a sleeve joint and the positioning head 11 The lower end of the telescopic section 32 is fixed to the lower end of the core rod 2 for the fixed ferrule 4.

As shown in FIGS. 1 and 2, the lower end surface of the cylindrical shell 1 is provided with a cavity 12, the positioning head 11 is located at the center of the top wall of the cavity 12, and the positioning head 11 protrudes from the lower end surface of the cylindrical shell 1. The ferrule 4 has a limit ring 5 outside. The ferrule 4 and the limit ring 5 are made of stainless steel. The limit ring 5 is located in the cavity 12. The inner circumference of the cavity 12 is provided with an annular groove 121 and the limit ring The outer edge of 5 is located in the annular groove 121, and the mouth of the cavity 12 is provided with an outwardly expanding relief groove 122. The upper end of the ferrule 4 is provided with a ring-shaped anti-drop portion 41, and the ring-shaped anti-drop portion 41 abuts against the upper surface of the inner edge of the limiting ring 5. The vertical section of the stop ring 5 is circular, the upper port of the ferrule 4 expands outward to form a ring-shaped anti-dropping part 41, and the connection between the ring-shaped anti-dropping part 41 and the outer peripheral surface of the ferrule 4 is in a circular arc transition.

The anti-scale valve core uses a ferrule 4 to fix the sleeve section 31 of the waterproof sleeve 3 with the positioning head 11 of the cylindrical shell 1, and at the same time, a limit ring 5 is arranged outside the ferrule 4, and the upper end of the ferrule 4 is ring-shaped The anti-dropping portion 41 abuts against the upper surface of the inner edge of the stop ring 5, and the outer edge of the stop ring 5 is located in the annular groove 121 of the cavity 12 on the lower end surface of the cylindrical casing 1, and the annular groove 121 makes the limit stop. The ring 5 cannot escape from the cavity 12, so that the limiting ring 5 can block the ring-shaped anti-falling portion 41, so that the ferrule 4 cannot escape from the cavity 12. Through the cooperation of the stop ring 5 and the annular groove 121 and the cooperation of the stop ring 5 and the annular anti-drop part 41, the locking sleeve 4 is prevented from falling off, thereby improving the connection firmness of the waterproof sleeve 3 and ensuring the structure Reliability and extended service life.

The specific embodiments described in this article are merely examples to illustrate the spirit of the present invention. Those skilled in the technical field of the present utility model can make various modifications or additions to the specific embodiments described or substitute similar methods, but they will not deviate from the spirit of the utility model or exceed the appended claims. The defined range.

Claims

An anti-fouling valve core, comprising a cylindrical shell (1) with a cavity and a core rod (2) penetrating the cylindrical shell (1) and capable of moving axially along the cylindrical shell (1) ), the lower end of the core rod (2) extends out of the lower end of the cylindrical shell (1), and a waterproof sleeve made of elastic sealing material is connected between the lower end of the core rod (2) and the lower end of the cylindrical shell (1) (3) The waterproof cover (3) includes a socket section (31) and a telescopic section (32) from top to bottom. The socket section (31) is in a straight cylindrical shape, and the lower end of the cylindrical shell (1) is provided with a positioning head (11), the positioning head (11) is cylindrical and the socket section (31) is sleeved outside the positioning head (11), and the socket section (31) is provided with the socket section (31) and the positioning head (11) The fixed ferrule (4), the lower end of the telescopic section (32) is fixed on the lower end of the core rod (2), characterized in that the lower end of the cylindrical shell (1) is provided with a cavity (12), and the positioning head (11) Located at the center of the top wall of the cavity (12), the positioning head (11) protrudes out of the lower end surface of the cylindrical shell (1), and the clamping sleeve (4) is connected with a limit ring (5) and a limit ring ( 5) Located in the cavity (12), the inner circumferential surface of the cavity (12) is provided with an annular groove (121), the outer edge of the limit ring (5) is located in the annular groove (121), and the upper end of the clamping sleeve (4) is provided There is an annular anti-dropping part (41), and the annular anti-dropping part (41) abuts against the upper surface of the inner edge of the limiting ring (5).
The anti-fouling valve core according to claim 1, characterized in that the vertical section of the limit ring (5) is circular, and the upper port of the ferrule (4) is expanded to form a ring-shaped anti-dropping part (41) , The connection between the ring-shaped anti-dropping part (41) and the outer peripheral surface of the ferrule (4) presents a circular arc transition.
The anti-scale valve core according to claim 1 or 2, characterized in that the telescopic section (32) is in a bellows shape.
The anti-scale valve core according to claim 1 or 2, characterized in that the mouth of the cavity (12) is provided with an outwardly expanding relief groove (122).
The anti-scale valve core according to claim 1 or 2, characterized in that the ferrule (4) and the limit ring (5) are made of stainless steel.