CN207034318U - A leak-proof flow control valve - Google Patents

Abstract

The utility model discloses a leakage-proof flow control valve, which comprises a valve body, a valve cover, a water-swelling adhesive tape, a joint and a pressure reducing device; the top of the valve body is provided with a threaded hole, the valve cover is fixed at the upper opening of the valve body through a bolt, and a water-swelling adhesive tape is adhered between the valve body and the valve cover; the two ends of the valve body are respectively provided with a liquid inlet and a liquid outlet, the inner walls of the liquid inlet and the liquid outlet are provided with threads, and the joint is wound with a sealing material and is screwed at the liquid inlet and the liquid outlet; the pressure reducing device comprises a shell, an upper cover, an electromagnet, a junction box, a movable iron core, a sealing block and a pipeline, wherein connecting blocks are arranged at four corners of the bottom of the shell, the shell is fixed on the outer wall of the liquid inlet of the valve body through bolts, and a lower pressure reducing port is formed in the valve body. The utility model has novel structure and scientific and reasonable design; the sealing performance is good, and the pressure reducing device can be started under the condition of larger pressure, so that the flow control valve does not leak, resources are not wasted, and the working environment is not influenced.

Description

A leak-proof flow control valve

technical field

The utility model relates to a control valve, in particular to a leak-proof flow control valve, which belongs to the technical field of pipeline valve bodies.

Background technique

The flow control valve is a valve that controls the flow rate of the orifice by changing the liquid resistance of the orifice under a certain pressure difference, thereby adjusting the movement speed of the actuator. Traditional flow control valves are prone to leakage when used for a long time or under excessive pressure, which not only causes waste of resources, but also affects the working environment.

Utility model content

The purpose of the utility model is to provide a leak-proof flow control valve, which has a simple structure and is easy to use, so as to solve the above-mentioned defects caused by the prior art.

In order to solve the above technical problems, the utility model provides the following technical solutions:

A leak-proof flow control valve, including a valve body, a valve cover, a water-swellable rubber strip, a joint and a pressure reducing device; the top of the valve body is provided with a threaded hole, and the valve cover is fixed on the upper port of the valve body by bolts , and there is a water-swellable rubber strip adhered between the valve body and the valve cover; the two ends of the valve body are the liquid inlet and the liquid outlet respectively, and the inner walls of the liquid inlet and the liquid outlet are provided with threads. The joint is wound with a sealing material and screwed on the liquid inlet and outlet; the decompression device includes a shell, an upper cover, an electromagnet, a junction box, a moving iron core, a sealing block and a pipe, and the bottom of the shell There are connecting blocks at the four corners, the shell is fixed on the outer wall of the valve body at the liquid inlet by bolts, and the valve body is provided with a lower pressure reducing port; the upper cover is fixed on the top center of the shell by bolts , and a sealing ring is installed between the upper cover and the housing, a decompression chamber is provided inside the housing, the electromagnet is installed on the top of the upper cover, the junction box is installed on one side of the electromagnet, and the output end of the electromagnet is installed with a dynamic iron core, the moving iron core can extend into the decompression chamber, the end of the moving iron core is equipped with a sealing block, and the sealing block can move up and down with the moving iron core; the lower decompression port passes through the upper The decompression port is connected with the decompression chamber, and a sealing ring is installed around the junction of the upper decompression port and the lower decompression port; a control port is provided at the center of the bottom of the decompression chamber, and one end of the pipeline is connected to the control port , and the other end leads to the liquid outlet of the valve body.

As a preferred technical solution of the present invention, the cross-sectional area of the control port is smaller than that of the sealing block, and the sealing block is made of elastically deformable soft rubber.

As a preferred technical solution of the utility model, the sealing material is a polytetrafluoroethylene tape.

As a preferred technical solution of the present utility model, the pipe is a hard pipe made of stainless steel.

Beneficial effects: Compared with the traditional technology, a leak-proof flow control valve of the utility model has a novel structure and a scientific and reasonable design; The control valve does not leak, neither wastes resources nor affects the working environment.

Description of drawings

Fig. 1 is the overall structural diagram of a kind of anti-leakage type flow control valve of the present invention;

Fig. 2 is a partial enlarged view of place A in Fig. 1;

Among them: 1-valve body, 2-bonnet, 3-water-swellable rubber strip, 4-joint, 5-liquid inlet, 6-liquid outlet, 7-shell, 8-top cover, 9-electromagnet , 10-junction box, 11-moving iron core, 12-sealing block, 13-pipeline, 14-lower decompression port, 15-upper decompression port, 16-control port, 17-sealing ring.

detailed description

In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific embodiments.

As shown in Figures 1-2, a leak-proof flow control valve includes a valve body 1, a valve cover 2, a water-swellable rubber strip 3, a joint 4 and a pressure reducing device; the top of the valve body 1 is provided with Threaded hole, the bonnet 2 is fixed on the upper opening of the valve body 1 by bolts, and a water-swellable rubber strip 3 is adhered between the valve body 1 and the bonnet 2; The mouth 5 and the liquid outlet 6, the inner wall of the liquid inlet 5 and the liquid outlet 6 are provided with threads, and the joint 4 is wound with a sealing material and screwed on the liquid inlet 5 and the liquid outlet 6; the decompression The device includes a housing 7, an upper cover 8, an electromagnet 9, a junction box 10, a moving iron core 11, a sealing block 12 and a pipe 13. There are connecting blocks at the four corners of the bottom of the housing 7, and the housing 7 is fixed by bolts. On the outer wall at the liquid inlet 5 of the valve body 1, and the valve body 1 is provided with a lower decompression port 14; the upper cover 8 is fixed on the top center of the housing 7 by bolts, and the upper cover 8 is connected to the housing A sealing ring 17 is installed between 7, a decompression chamber is provided inside the housing 7, the electromagnet 9 is installed on the top of the upper cover 8, the junction box 10 is installed on one side of the electromagnet 9, and the output end of the electromagnet 9 is installed with Moving iron core 11, moving iron core 11 can stretch into the inside of decompression chamber, the end of moving iron core 11 is equipped with sealing block 12, and sealing block 12 can move up and down along with moving iron core 11; Port 14 communicates with the decompression chamber through the upper decompression port 15 on the housing 7, and a sealing ring 17 is installed around the junction of the upper decompression port 15 and the lower decompression port 14; the center of the bottom of the decompression chamber A control port 16 is provided at the place, and one end of the pipe 13 is connected to the control port 16, and the other end leads to the liquid outlet 6 of the valve body 1.

Wherein, the cross-sectional area of the control port 16 is smaller than that of the sealing block 12, and the sealing block 12 is made of elastically deformable soft rubber.

Wherein, the sealing material is polytetrafluoroethylene tape.

Wherein, the pipeline 13 is a hard tube made of stainless steel.

Working principle: the device has a water-swellable rubber strip 3 adhered between the valve body 1 and the valve cover 2, and a sealing material is wound on the joint 4, which can ensure that the flow control valve has a strong sealing performance; in addition The normal state of the sealing block 12 is to block the control port 16. When the flow control valve is in use, it will inevitably cause excessive pressure at the liquid inlet 5. After the electromagnet 9 is energized, the moving iron core 11 moves upward, and the sealing block 12 follows As the moving iron core 11 moves up, the control port 16 is opened. At this time, the liquid enters the decompression chamber from the upper and lower decompression ports 14, and then enters the liquid outlet 6 of the valve body 1 through the pipeline 13, thus playing a role of decompression. Function to ensure that the flow control valve does not leak.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to fall within the scope of the claims All changes within the meaning and range of equivalents of the required elements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (4)

1. A leak-proof flow control valve, comprising a valve body, a valve cover, a water-swellable rubber strip, a joint and a pressure reducing device; it is characterized in that: the top of the valve body is provided with a threaded hole, and the valve cover is fixed by bolts At the upper opening of the valve body, there is a water-swellable rubber strip adhered between the valve body and the valve cover; the two ends of the valve body are the liquid inlet and the liquid outlet, and the ends of the liquid inlet and the liquid outlet are respectively Threads are provided on the inner wall, sealing material is wound on the joint and screwed at the liquid inlet and outlet; the decompression device includes a shell, an upper cover, an electromagnet, a junction box, a moving iron core, a sealing block and There are connecting blocks at the four corners of the bottom of the casing, the casing is fixed on the outer wall of the valve body at the liquid inlet by bolts, and the valve body is provided with a lower pressure reducing port; the upper cover is fixed on the valve body by bolts At the center of the top of the housing, a sealing ring is installed between the upper cover and the housing. There is a decompression chamber inside the housing. The electromagnet is installed on the top of the upper cover, and the junction box is installed on one side of the electromagnet. The electromagnet A moving iron core is installed at the output end of the moving iron core, and the moving iron core can extend into the interior of the decompression chamber. A sealing block is installed at the end of the moving iron core, and the sealing block can move up and down with the moving iron core; the lower decompression port The upper decompression port on the shell communicates with the decompression chamber, and a sealing ring is installed around the junction of the upper decompression port and the lower decompression port; a control port is provided at the center of the bottom of the decompression chamber, and the pipeline One end of the valve is connected to the control port, and the other end leads to the liquid outlet of the valve body. 2. A leak-proof flow control valve according to claim 1, characterized in that: the cross-sectional area of the control port is smaller than that of the sealing block, and the sealing block is made of elastically deformable soft rubber. 3. A leak-proof flow control valve according to claim 1, characterized in that: the sealing material is polytetrafluoroethylene tape. 4. A leak-proof flow control valve according to claim 1, characterized in that: said pipe is a hard pipe made of stainless steel.