Knife-shaped gate valve with replaceable valve seat sealing element

Abstract

The knife type gate valve with the replaceable valve seat sealing element is simple in structure and capable of preventing a valve rod from rusting and comprises a valve body, a valve cover arranged on the valve body, a water inlet channel, a water outlet channel, a valve plate and a protection box, the water inlet channel and the water outlet channel are formed in the valve body, and the valve plate and the protection box are arranged between the water inlet channel and the water outlet channel. One end of the valve rod is connected with the valve plate, the other end of the valve rod penetrates out of the valve cover, a sealing groove is formed in the valve cover in a surrounding mode, the protection box is arranged in the sealing groove to cover the valve rod, a fixed channel is formed in the protection box, a sliding channel is formed in the valve cover, and a fixed block is arranged in the sliding channel in a sliding mode. A pushing device used for pushing the fixing block to slide into the fixing channel is arranged in the sliding channel, and a releasing device used for releasing clamping of the fixing block and the fixing channel is further arranged on the valve cover.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, especially a kind of knife-type gate valve of replaceable valve seat sealing element. BACKGROUND

[0002] With the development of society, whether in production, or in life needs pipeline connection, in pipeline connection, all need to be applied to pipeline connecting piece, and the gate valve is one of the pipeline connecting pieces frequently used.

[0003] Chinese patent network disclosure number CN202323592403.3 discloses a kind of knife-type gate valve of replaceable valve seat sealing element, although it can realize the replacement of sealing, but when using gate valve, since the valve stem of gate valve is exposed to air, when being accepted wind blows sun and rain, easy to rust, affect the service life and opening and closing of valve.

[0004] In order to solve this problem, the utility model is generated. UTILITY MODEL CONTENT

[0005] Therefore, in view of the above problems, the utility model provides a kind of knife-type gate valve of replaceable valve seat sealing element, which is simple in structure and can prevent valve stem from rusting.

[0006] To solve the above technical problems, the utility model takes the following solution: a kind of knife-type gate valve of replaceable valve seat sealing element, including valve body, valve cover arranged on valve body, water inlet channel and water outlet channel opened on valve body, valve plate arranged between water inlet channel and water outlet channel, protection box, the valve body is equipped with valve stem, one end of the valve stem is connected with the valve plate, the other end of the valve stem passes out valve cover, sealing groove is opened around the valve cover, the protection box is arranged in sealing groove to cover the valve stem, the protection box is equipped with fixed channel, the valve cover is equipped with sliding channel, the fixed block is slidably arranged in the sliding channel, the sliding channel is equipped with the pushing device for pushing the fixed block to slide into the fixed channel, the valve cover is further equipped with the release device for releasing the engagement of the fixed block and the fixed channel.

[0007] Further improvement is that: the pushing device is: spring, one end of the spring is connected with the fixed block, the other end of the spring is connected with the inner wall of sliding channel.

[0008] Further improvement is that: the release device includes rotating ring, the rotating ring is rotatably arranged on the outside of valve cover, the magnet is arranged in the rotating ring and on the horizontal line of sliding channel, the fixed block has magnetism that is attracted by the magnet.

[0009] Further improvement is that: it further includes filter screen, the filter screen is arranged in water inlet channel, the valve body is equipped with cleaning device in water inlet channel for cleaning filter screen.

[0010] Further improvement is that the cleaning device comprises a cleaning brush, a reciprocating screw rod is arranged to rotate through the valve body, a reciprocating block is arranged on the cleaning brush, the reciprocating block is arranged on the reciprocating screw rod, the other end of the reciprocating screw rod is arranged to pass through the valve body and is provided with a driving device for driving the reciprocating screw rod to rotate.

[0011] Further improvement is that a sewage discharge channel is arranged in front of the filter screen of the valve body, a water passing seat through which water can pass is further arranged in the sewage discharge channel, the end of the reciprocating screw rod is arranged to rotate on the water passing seat, and a sealing device for sealing the sewage discharge channel is further arranged on the valve body.

[0012] Further improvement is that the sealing device comprises a sealing chamber, the sealing chamber is arranged on the outer end surface of the valve body, the sealing chamber is connected with the sewage discharge channel, and a sewage discharge plug is threadedly connected to the bottom of the sealing chamber.

[0013] By adopting the foregoing technical scheme, the utility model has the advantages of:

[0014] The simple structure can prevent the valve rod from rusting. The valve rod is covered by the protection box, and is located in the protection box, so that the valve rod is prevented from being exposed to wind, sunlight and rain, and is not prone to rust, thereby prolonging the service life of the valve rod and the valve. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is a local cutaway structure schematic view of a knife gate valve with replaceable valve seat sealing element according to an embodiment of the utility model.

[0016] Fig. 2 is an enlarged structure schematic view of A in the utility model embodiment. DETAILED DESCRIPTION

[0017] The utility model will be further described in combination with the drawings and specific embodiments.

[0018] REFERENCE Figs. 1-2, the utility model embodiment discloses: a knife-type gate valve with a replaceable valve seat seal, comprising a valve body 1, a valve cover 12 provided on the valve body 1, an inlet channel 2 and a water outlet channel opened on the valve body 1, a valve plate provided between the water inlet channel 2 and the water outlet channel, and a protection box 3, the valve body 1 is provided with a valve stem, one end of the valve stem is connected to the valve plate, the other end of the valve stem passes through the valve cover 12, a sealing groove is provided around the valve cover 12, the protection box 3 is provided in the sealing groove to cover the valve stem, a fixed channel is provided on the protection box 3, the valve cover 12 is provided with a sliding channel 14, a fixed block 13 is slidingly provided in the sliding channel 14, a spring 15 is provided in the sliding channel 14 for pushing the fixed block 13 to slide into the fixed channel, one end of the spring 15 is connected to the fixed block 13, and the other end of the spring 15 is connected to the inner wall of the sliding channel 14, and the valve cover 12 is also provided with a releasing device for releasing the engagement of the fixed block 13 with the fixed channel.

[0019] Specifically, the release device includes a rotating ring 16, which is rotatably arranged on the outer side of the valve cover 12. A magnet (not shown in the figure) is provided on the horizontal line of the sliding channel 14 in the rotating ring 16, and the fixed block 13 has magnetic properties that attract the magnet.

[0020] During use, the protective box 3 is placed over the sealing groove of the valve cover 12, and the valve stem is positioned within the protective box 3, thereby protecting the valve stem from wind, sun, and rain, making it less likely to rust, thereby increasing the service life of the valve stem and, in turn, the service life of the valve. The rotating ring 16 is then rotated so that the magnet of the rotating ring 16 is offset from the fixed block 13. The spring 15 releases its elastic force, pushing the fixed block 13 to slide into the fixed channel and engage, thereby restricting the protective box 3 and preventing it from being easily stolen or knocked out of the sealing groove, thereby facilitating long-term use. To rotate the valve stem, the rotating ring 16 is reversed so that the magnet and the fixed block 13 are at the same level. The magnet and the fixed block 13 attract each other, causing the fixed block 13 to slide into the sliding channel 14, releasing its engagement with the fixed channel, thereby removing the protective box 3 and rotating the valve stem.

[0021] In order to prevent impurities in the water flow from entering the valve body 1 and clogging the pipe and attaching to the valve plate and wearing the valve plate, a filter screen 4 and a cleaning brush are also included. The filter screen 4 is arranged in the water inlet channel 2. A reciprocating screw 6 is rotatably passed through the valve body 1. A reciprocating block 5 is provided on the cleaning brush. The reciprocating block 5 is provided on the reciprocating screw 6. The other end of the reciprocating screw 6 passes through the valve body 1 and is provided with a drive motor 9 for driving the reciprocating screw 6 to rotate.

[0022] In order to be able to discharge the impurities, the valve body 1 is provided with a blowdown channel 8 in front of the filter screen 4, the blowdown channel 8 is further provided with a water passing seat 7 through which water can pass, the end of the reciprocating screw rod 6 is rotatably arranged on the water passing seat 7, the valve body 1 is further provided with a sealing chamber 10 which seals the blowdown channel 8, the sealing chamber 10 is arranged on the outer end surface of the valve body 1, the sealing chamber 10 is in communication with the blowdown channel 8, and the bottom of the sealing chamber 10 is threadedly connected with a blowdown plug 11.

[0023] When the water flows through the water inlet channel 2, the impurities are filtered by the filter screen 4, so that the impurities are prevented from entering the inside of the valve body 1 and from clogging the pipeline and from being attached to the valve plate to wear the valve plate.

[0024] The basic principle and main features and advantages of the utility model are shown and described above, and the skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments, the above-mentioned embodiments and the description in the description are only for illustrating the principle of the utility model, and the utility model can have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model which is claimed to be protected, and the protection scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A knife-type gate valve with a replaceable valve seat seal, comprising a valve body, a valve cover disposed on the valve body, a water inlet channel and a water outlet channel formed on the valve body, and a valve plate disposed between the water inlet channel and the water outlet channel; the valve body being provided with a valve stem, one end of which is connected to the valve plate, and the other end of which extends through the valve cover, characterized in that: It also includes a protection box, a sealing groove is opened around the valve cover, the protection box is arranged in the sealing groove to cover the valve stem, a fixed channel is opened on the protection box, a sliding channel is opened on the valve cover, a fixed block is slidably provided in the sliding channel, a pushing device is provided in the sliding channel for pushing the fixed block to slide into the fixed channel, and a releasing device is also provided on the valve cover for releasing the engagement between the fixed block and the fixed channel.

2. A knife-type gate valve with a replaceable valve seat seal according to claim 1, characterized in that: The pushing device is a spring, one end of the spring is connected to the fixed block, and the other end of the spring is connected to the inner wall of the sliding channel.

3. The knife-type gate valve with replaceable valve seat seal according to claim 1, characterized in that: The release device includes a rotating ring, which is rotatably arranged on the outer side of the valve cover. A magnet is arranged on the horizontal line of the sliding channel inside the rotating ring, and the fixed block has magnetic properties that attract the magnet.

4. The knife-type gate valve with replaceable valve seat seal according to claim 1, characterized in that: It also includes a filter screen, which is arranged in the water inlet channel. The valve body is located in the water inlet channel and is provided with a cleaning device for cleaning the filter screen.

5. The knife-type gate valve with replaceable valve seat seal according to claim 4, characterized in that: The cleaning device includes a cleaning brush, a reciprocating screw is rotatably provided in the valve body, a reciprocating block is provided on the cleaning brush, and the reciprocating block is provided on the reciprocating screw. The other end of the reciprocating screw passes through the valve body and is provided with a driving device for driving the reciprocating screw to rotate.

6. The knife-type gate valve with replaceable valve seat seal according to claim 5, characterized in that: The valve body is located in front of the filter screen and is provided with a sewage discharge channel. A water passing seat is also provided in the sewage discharge channel for water to pass through. The end of the reciprocating screw is rotatably arranged on the water passing seat. The valve body is also provided with a sealing device for sealing the sewage discharge channel.

7. A knife-type gate valve with a replaceable valve seat seal according to claim 6, characterized in that: The sealing device comprises a sealing chamber, which is arranged on the outer end surface of the valve body and is connected to the sewage discharge channel. The bottom of the sealing chamber is threadedly connected to a sewage discharge plug.

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