CN203067918U - Gate valve with elastic sealing block - Google Patents

Abstract

The utility model discloses a gate valve with an elastic sealing block, which comprises a valve body, a fluid passage and a valve stem passage are arranged in the valve body, a gate plate for opening or closing the fluid passage is arranged in the fluid passage, and a valve stem is connected to the gate plate , the valve stem is set in the valve stem passage, the valve stem extends away from the gate plate and passes through the valve body, the valve stem passage of the valve body is provided with an elastic sealing block and a valve cover on the side where the valve stem passes through, and the elastic seal The block and the bonnet are sequentially sleeved on the valve stem along the extension direction of the valve stem, the elastic sealing block is in dynamic sealing cooperation with the valve stem, and the bonnet is fixedly connected with the inner side wall of the valve stem channel through threaded connection. The gate valve with elastic sealing block of the utility model uses the elastic sealing block to seal the valve stem of the gate valve, which saves the packing cap, packing gland, packing and other parts of the traditional gate valve. The structure is simpler, and the friction resistance of the elastic sealing body is better. Higher durability and longer service life.

Description

A gate valve with an elastic sealing block

technical field

The utility model relates to a pipeline opening and closing element, in particular to a gate valve with an elastic sealing block.

Background technique

Gate valve is one of the most commonly used shut-off valves, mainly used to connect or cut off the medium in the pipeline. The pressure, temperature and diameter of gate valves are widely used. Gate valves have the advantages of small fluid resistance, labor-saving opening and closing, and unrestricted flow of media, so they are widely used, especially for medium and large diameter pipelines.

Existing gate valves generally include a valve body, in which a fluid passage for the medium fluid to flow through is provided, and a gate plate for opening or closing the fluid passage is provided in the fluid passage, and a valve rod for driving the gate plate is connected to the gate plate. The side of the stem away from the gate passes through the valve body, and a packing cover and a bonnet are arranged at the end of the stem passing through. The packing sealing performance is poor. After long-term use, the packing will become finely divided, loose, and have poor durability. The complex structure of the gate valve increases the processing cost.

Contents of the invention

The purpose of the utility model is: aiming at the deficiencies of the prior art, the utility model provides a gate valve with an elastic sealing block with high sealing performance, durability and simple structure.

A gate valve with an elastic sealing block, comprising a valve body, the valve body is provided with a fluid passage and a stem passage, the fluid passage is provided with a gate for opening or closing the fluid passage, and the gate is connected with a valve The valve stem is set in the valve stem passage, and the valve stem extends away from the gate plate and passes through the valve body. The valve stem passage of the valve body is set on the side where the valve stem passes through. There is an elastic sealing block and a valve cover, and the elastic sealing block and the valve cover are sequentially sleeved on the valve stem along the extending direction of the valve stem. The elastic sealing block is in dynamic and sealing cooperation with the valve stem, and the valve The cover is fixedly connected with the inner side wall of the valve stem channel through threaded connection.

Preferably, the side of the elastic sealing block facing away from the valve cover is a tapered surface, and the thickness of the elastic sealing block gradually decreases from the center of the valve stem to the outside. After adopting the above-mentioned preferred scheme, the side of the elastic sealing block sleeved on the valve stem is easy to be worn due to the dynamic seal with the valve stem. The setting of the utility model can increase the service life of the sealing block.

Preferably, a boss is provided on the inner side wall of the valve stem channel away from the gate plate, and the elastic sealing block and the valve cover are arranged on the boss. After adopting the above-mentioned optimal solution, only the boss needs to be processed on the stem channel to install the valve cover and the elastic sealing block, the structure is simpler, and the processing and installation are more convenient.

Preferably, the gate is wedge-shaped, one side of the gate is an inclined surface of the gate, the thickness of the gate gradually decreases from the valve stem toward the direction of the gate, and the fluid channel is corresponding to the inclined surface of the gate. One side is provided with an inclined surface of the valve body corresponding to the inclined surface of the gate plate. After adopting the above-mentioned preferred scheme, the thickness of the side of the gate away from the valve stem is small. When the gate is closed, the gate is downward and squeezed against the side wall of the fluid channel, and the side wall of the fluid channel reacts against the gate. On the plate, the sealing of the gate and the fluid channel can be better.

Preferably, the side of the ram facing away from the inclined surface of the ram is a straight plane of the ram, and the side of the fluid channel corresponding to the straight plane of the ram is provided with an annular protrusion. After adopting the above-mentioned optimal case, when the annular protrusion seals the fluid channel in the gate, the annular and the straight plane of the gate are squeezed against each other, which improves the sealing performance, and the annular protrusion is easy to process and repair, which can improve the gate valve. durability.

Preferably, the gate plate is fixedly connected with the valve stem in a threaded manner. After adopting the above-mentioned optimal solution, the disassembly of the gate plate and the valve stem is more convenient, which is convenient for the user to check and maintain, and at the same time, the gate plate and the valve stem are fixed more firmly.

Preferably, the extension end of the valve stem passes through the valve cover and is provided with an operating handwheel at the end. After adopting the above preferred solution, it is convenient for the user to manually open or close the gate valve.

The gate valve with elastic sealing block of the utility model uses the elastic sealing block to seal the valve stem of the gate valve, which saves the packing cap, packing gland, packing and other parts of the traditional gate valve. The structure is simpler, and the friction resistance of the elastic sealing body is better. Higher durability and longer service life.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the utility model.

Detailed ways

As shown in Figure 1, the embodiment of the utility model is specifically a gate valve with an elastic sealing block, including a valve body 1, a fluid channel 11 and a valve stem channel 12 are arranged in the valve body 1, and an opening valve is provided in the fluid channel 11. Or close the gate 2 of the fluid channel 11, the gate 2 is connected with the valve stem 3, the valve stem 3 is arranged in the valve stem passage 12, the valve stem 3 extends in the direction away from the gate 2 and passes through the valve body 1, the valve The stem channel 12 of the body 1 is provided with an elastic sealing block 4 and a valve cover 5 on the side where the valve stem 3 passes through, and the elastic sealing block 4 and the valve cover 5 are sleeved on the valve stem 3 in sequence along the extending direction of the valve stem 3, The elastic sealing block 4 is in dynamic sealing cooperation with the valve stem 3 . The valve cover 5 is fixedly connected with the inner side wall of the valve stem channel 12 by means of threaded connection. The extension end of the valve rod 3 passes through the valve cover 5 and is provided with an operating hand wheel 6 at the end.

The side of the elastic sealing block 4 facing away from the valve cover 5 is a tapered surface 41 , and the thickness of the elastic sealing block 4 gradually decreases from the center of the valve stem 3 to the outside. A boss 121 is provided on the inner side wall of the valve stem channel 12 away from the gate 2 , and the elastic sealing block 4 and the valve cover are arranged on the boss 121 .

The gate plate 2 is wedge-shaped, and one side of the gate plate 2 is the gate plate inclined surface 21. The thickness of the gate plate 2 gradually decreases from the valve stem 3 toward the gate plate 2. A valve body inclined surface 13 corresponding to the gate inclined surface 21 is provided on the side. The side of the gate 2 facing away from the inclined plane 21 of the gate is a straight plane 22 of the gate, and the side of the fluid channel 11 corresponding to the straight plane 22 of the gate is provided with an annular protrusion 14 . The gate plate 2 is fixedly connected with the valve stem 3 by means of threads.

The working principle of the gate valve with sealing block of the utility model is basically the same as that of the gate valve of the prior art, the difference is that the utility model uses the elastic sealing block 4 instead of the traditional packing seal, which has better sealing performance and is more durable .

Claims (7)

1. gate valve with the elastic packing piece, comprise valve body, be provided with fluid passage and valve stem passage in the described valve body, be provided with the flashboard of opening or closing the fluid passage in the fluid passage, be connected with valve rod on the described flashboard, described valve rod is arranged in the valve stem passage, described valve rod is towards the direction extension that deviates from flashboard and pass valve body, it is characterized in that: the valve stem passage of described valve body is provided with elastic packing piece and valve gap in the side that valve rod passes, described elastic packing piece and valve gap are set on the valve rod along the valve rod bearing of trend successively, described elastic packing piece cooperates with described valve rod motive sealing, and described valve gap is fixedlyed connected by the mode that is threaded with the madial wall of valve stem passage.

2. the gate valve of band elastic packing piece according to claim 1, it is characterized in that: the side that described elastic packing piece deviates from valve gap is conical surface, the thickness of described elastic packing piece by the valve rod central direction to reducing gradually outward.

3. the gate valve of band elastic packing piece according to claim 1 and 2, it is characterized in that: described valve stem passage is provided with boss away from the madial wall of a side of flashboard, and described elastic packing piece and valve gap are arranged on the boss.

4. the gate valve of band elastic packing piece according to claim 1, it is characterized in that: described flashboard is wedge shape, one side of flashboard is the flashboard plane of inclination, the thickness of flashboard is reduced towards the flashboard direction gradually by valve rod, and the corresponding side in described fluid passage and flashboard plane of inclination is provided with and corresponding valve body plane of inclination, flashboard plane of inclination.

5. the gate valve of band elastic packing piece according to claim 4, it is characterized in that: the side that described flashboard deviates from the flashboard plane of inclination is the straight plane of flashboard, and the corresponding side in the straight plane of described fluid passage and flashboard is provided with annular protrusions.

6. according to the gate valve of claim 1 or 4 or 5 described band elastic packing pieces, it is characterized in that: described flashboard adopts the mode of screw thread to fixedly connected with described valve rod.

7. the gate valve of band elastic packing piece according to claim 1 is characterized in that: described valve rod extending end passes valve gap and is provided with the operation handwheel in the end.