阅读说明：本技术 一种闸阀 (Gate valve ) 是由 邵延荣 耿永红 张静静 于 2020-06-20 设计创作，主要内容包括：本发明涉及一种闸阀,所述的闸阀包括：阀体,具有进管以及出管,所述阀体内还具有切换腔,所述切换腔与所述进管以及出管连通；阀芯,设置于所述进管与出管之间,能够同时阻隔进管与切换腔,及出管与切换腔,所述阀芯具有第一截断位置以及第二截断位置,通过旋转所述阀芯,能够从第一截断位置切换至第二截断位置；旋杆,固定连接于所述阀芯；压杆,与所述阀芯顶部以可旋转的方式连接,且所述压杆与所述阀体螺纹连接,通过旋转所述压杆能够控制所述阀芯沿竖直方向移动,从而控制所述闸阀的通断,且通过向上移动阀芯,使阀芯与进管及出管分离,从而能够通过旋杆旋转阀芯,从而切换阀芯的工作面,延长闸阀的维修间隔,降低维修费用。(The present invention relates to a gate valve, comprising: the valve body is provided with an inlet pipe and an outlet pipe, and a switching cavity is also arranged in the valve body and is communicated with the inlet pipe and the outlet pipe; the valve core is arranged between the inlet pipe and the outlet pipe, can simultaneously block the inlet pipe and the switching cavity, and can simultaneously block the outlet pipe and the switching cavity, the valve core is provided with a first blocking position and a second blocking position, and the valve core can be switched from the first blocking position to the second blocking position by rotating the valve core; the rotary rod is fixedly connected to the valve core; the pressure rod is connected with the top of the valve core in a rotatable mode and is in threaded connection with the valve body, the valve core can be controlled to move in the vertical direction through rotating the pressure rod, so that the on-off of the gate valve is controlled, the valve core is separated from the inlet pipe and the outlet pipe through upwards moving the valve core, the valve core can be rotated through the rotary rod, the working surface of the valve core is switched, the maintenance interval of the gate valve is prolonged, and the maintenance cost is reduced.)

1. A gate valve, said gate valve comprising:

the valve body is provided with an inlet pipe and an outlet pipe, and a switching cavity is also arranged in the valve body and is communicated with the inlet pipe and the outlet pipe;

the valve core is arranged between the inlet pipe and the outlet pipe, can simultaneously block the inlet pipe and the switching cavity, and can simultaneously block the outlet pipe and the switching cavity, the valve core is provided with a first blocking position and a second blocking position, and the valve core can be switched from the first blocking position to the second blocking position by rotating the valve core;

the rotary rod is fixedly connected with the valve core, the upper end of the rotary rod extends out of the valve body, and the valve core can be switched between a first cut-off position and a second cut-off position by rotating the rotary rod;

the pressure rod is connected with the top of the valve core in a rotatable mode and is in threaded connection with the valve body, the valve core can be controlled to move in the vertical direction by rotating the pressure rod, so that the on-off of the gate valve is controlled, the valve core is separated from the inlet pipe and the outlet pipe by moving the valve core upwards, and the valve core can be rotated by the rotary rod.

2. The gate valve according to claim 1, wherein the valve body has an inverted trapezoidal shape, and the inlet pipe and the outlet pipe can be simultaneously brought into close contact with the side surfaces of the valve body, thereby blocking the inlet pipe and the outlet pipe.

3. The gate valve of claim 2, wherein the valve core is symmetrically provided with two sliding blocks, four sliding grooves are circumferentially distributed in the switching cavity at equal angles, and the sliding blocks can slide along the sliding grooves.

4. The gate valve of claim 3, wherein an avoiding portion is disposed at an upper portion of the switching chamber, and when the slider is located in the avoiding portion, the rotating rod can drive the valve core to rotate.

5. The gate valve according to claim 4, wherein an abutting block is provided in the avoiding portion, and when the slider rotates 90 degrees in the avoiding portion, the slider abuts against the abutting block to restrict rotation of the valve body.

6. The gate valve of claim 1, wherein the lever is sleeved outside the rotating rod, and the rotating rod extends out of the top of the lever.

7. The gate valve of claim 6, wherein the top of the rotating rod is provided with a first handle and the top of the pressure rod is provided with a second handle.

8. The gate valve of claim 1, wherein the spool has four abutment surfaces on which a sealing plate is disposed.

9. The gate valve of claim 1, wherein the switching chamber is provided with a positioning hole at a lower portion thereof, and the valve core is provided with a positioning protrusion at a bottom thereof for engaging with the positioning hole.

Technical Field

The invention relates to the technical field of pipeline valves, in particular to a gate valve.

Background

The gate valve is the most important valve at present, and is widely applied to the fields of petroleum, petrifaction, chemical industry, metallurgy, electric power, water conservancy, water heating, urban construction, fire fighting, machinery, coal, food, ships, power stations, ocean engineering and the like. Generally, the gate valve includes the valve body, and the valve body lower part has import and export, and the left end of import and the right-hand member of export all have sealed face, and the movive seal complex is equipped with the valve plate that can reciprocate and can not rotate between two sealed faces. Meanwhile, the upper part of the valve plate is connected with a valve rod, and the upper part of the valve rod is connected with a handle through a screw nut mechanism. After the handle rotates, the valve rod is driven to move up and down through the screw rod nut mechanism, then the valve plate moves up and down to seal or open the two sealing inclined planes, and finally the inlet and the outlet are communicated or cut off.

With the development of gate valve technology, manufacturers have prepared both sealing surfaces as bevels in order to maintain a better seal. Correspondingly, the valve plate is made into a wedge shape with a small end at the bottom, so that the sealing effect of the gate valve is improved to a greater extent. However, even after the above improvement, the gate valve has the following drawbacks: the valve plate can appear wearing and tearing after long-time the use, and then sealed effect is greatly discounted, causes the valve to reveal. When the valve plate damages and causes the leakage in the use of current gate valve, need stop whole pipeline or equipment, pull down the gate valve and carry out valve plate maintenance or change, influence production efficiency, many operating modes do not allow equipment to shut down moreover, in case shut down can cause great economic loss.

Disclosure of Invention

In view of the above, it is desirable to provide a gate valve that has a simple structure and can replace a valve plate of the gate valve on-line without stopping the gate valve.

The invention discloses a gate valve, which comprises: valve body, case, swing arm, depression bar. The valve body is provided with an inlet pipe and an outlet pipe, and the valve body is also provided with a switching cavity which is communicated with the inlet pipe and the outlet pipe; the valve core is arranged between the inlet pipe and the outlet pipe, can simultaneously block the inlet pipe and the switching cavity, and can simultaneously block the outlet pipe and the switching cavity, the valve core is provided with a first blocking position and a second blocking position, and the valve core can be switched from the first blocking position to the second blocking position by rotating the valve core; the rotary rod is fixedly connected with the valve core, the upper end of the rotary rod extends out of the valve body, and the valve core can be switched between a first cut-off position and a second cut-off position by rotating the rotary rod; the pressure rod is connected with the top of the valve core in a rotatable mode, the pressure rod is in threaded connection with the valve body, the valve core can be controlled to move in the vertical direction by rotating the pressure rod, so that the on-off of the gate valve is controlled, the valve core is separated from the inlet pipe and the outlet pipe by moving the valve core upwards, and the valve core can be rotated by the rotary rod.

In one embodiment, the valve core is in an inverted trapezoidal table shape, the inlet pipe and the outlet pipe can be tightly attached to the side surface of the valve core at the same time, so that the inlet pipe and the outlet pipe are blocked, and the valve core can be limited to rotate by the attachment of the inlet pipe and the outlet pipe to the valve core.

In one embodiment, two sliding blocks are symmetrically arranged on the valve core, four sliding grooves are circumferentially distributed in the switching cavity at equal angles, and the sliding blocks can slide along the sliding grooves.

In one embodiment, an avoiding portion is arranged at the upper portion of the switching cavity, and when the sliding block is located in the avoiding portion, the rotating rod can drive the valve core to rotate.

In one embodiment, a contact block is arranged in the avoiding portion, and when the slide block rotates 90 degrees in the avoiding portion, the slide block can be in contact with the contact block to limit rotation of the valve core.

In one embodiment, the rotation rod is sleeved with the compression rod, and the rotation rod extends out of the top of the compression rod.

In one embodiment, the top of the rotating rod is provided with a first handle, and the top of the pressure rod is provided with a second handle.

In one embodiment, the valve element has four abutment surfaces, on which a sealing plate is arranged.

In one embodiment, a positioning hole is formed in the lower portion of the switching cavity, and a positioning protrusion matched with the positioning hole is formed in the bottom of the valve core.

The technical scheme has the advantages that:

(1) when the sealing plate at the working position is damaged to cause the leakage of the gate valve, a new sealing plate can be switched by rotating the valve core, so that the sealing performance of the gate valve is ensured;

(2) the valve core is provided with a plurality of working faces, and the continuous service life of the gate valve is prolonged by switching the working faces;

(3) the invention can replace the sealing plate without shutdown, ensures the continuous work of the pipeline or the equipment, improves the system operation efficiency, and avoids economic loss caused by shutdown maintenance and replacement of the valve seat.

Drawings

FIG. 1 is a half sectional view of a gate valve provided in the present invention;

FIG. 2 is a cross-sectional view taken along plane A-A of FIG. 1 in accordance with the present invention;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1 in accordance with the present invention;

FIG. 4 is a half sectional view showing another working state of a gate valve according to the present invention;

FIG. 5 is a cross-sectional view taken along plane C-C of FIG. 4 in accordance with the present invention;

FIG. 6 is a cross-sectional view taken along plane D-D of FIG. 4 in accordance with the present invention;

fig. 7 is a schematic three-dimensional structure diagram of a valve core of a gate valve provided by the invention.

In the figure, the gate valve 100, the valve body 1, the inlet pipe 11, the outlet pipe 12, the switching chamber 13, the positioning hole 131, the slide groove 132, the escape portion 133, the abutment block 134, the valve body 2, the slider 21, the abutment surface 22, the seal plate 23, the positioning boss 24, the swing lever 3, the first handle 31, the press lever 4, and the second handle 41 are shown.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 4, the present invention discloses a gate valve 100, which includes: the valve comprises a valve body 1, a valve core 2, a rotary rod 3 and a pressure rod 4. The valve body 1 is provided with an inlet pipe 11 and an outlet pipe 12, a switching cavity 13 is further arranged in the valve body 1, and the switching cavity 13 is communicated with the inlet pipe 11 and the outlet pipe 12; the valve core 2 is arranged between the inlet pipe 11 and the outlet pipe 12, can simultaneously block the inlet pipe 11 and the switching cavity 13, and can simultaneously block the outlet pipe 12 and the switching cavity 13, the valve core 2 has a first blocking position and a second blocking position, and the valve core 2 can be switched from the first blocking position to the second blocking position by rotating; the rotary rod 3 is fixedly connected with the valve core 2, the upper end of the rotary rod 3 extends out of the valve body 1, and the valve core 2 can be switched between a first cut-off position and a second cut-off position by rotating the rotary rod 3; the pressure lever 4 is rotatably connected with the top of the valve element 2, the pressure lever 4 is in threaded connection with the valve body 1, the valve element 2 can be controlled to move in the vertical direction by rotating the pressure lever 4, so that the on-off of the gate valve 100 is controlled, the valve element 2 is separated from the inlet pipe 11 and the outlet pipe 12 by moving the valve element 2 upwards, and the valve element 2 can be rotated by the rotary rod 3.

Preferably, as shown in fig. 7, the valve element 2 is in an inverted trapezoidal platform shape, the side surface of the valve element 2 can be tightly attached to the inlet pipe 11 and the outlet pipe 12 at the same time, so as to block the inlet pipe 11 and the outlet pipe 12, and the attachment of the inlet pipe 11 and the outlet pipe 12 to the valve element 2 can limit the rotation of the valve element 2.

It can be understood that the valve core 2 is configured to be a trapezoid table, so that the valve core 2 has 4 side surfaces, so that two opposite side surfaces form one group, and the inlet pipe 11 and the outlet pipe 12 can be simultaneously sealed, and after the valve core 2 is rotated by 90 degrees, another group of opposite side surfaces can be used for simultaneously sealing the inlet pipe 11 and the outlet pipe 12, so that the valve core 2 has a plurality of cut-off positions.

Preferably, two sliding blocks 21 are symmetrically arranged on the valve core 2, four sliding grooves 132 are circumferentially distributed in the switching cavity 13 at equal angles, and the sliding blocks 21 can slide along the sliding grooves 132.

Preferably, an avoiding portion 133 is disposed at an upper portion of the switching chamber 13, and when the slider 21 is located in the avoiding portion 133, the rotating rod 3 can drive the valve element 2 to rotate.

Preferably, a contact block 134 is provided in the escape portion 133, and when the slider 21 rotates 90 degrees in the escape portion 133, the contact block 134 comes into contact with the escape portion to restrict the rotation of the valve body 2.

It will be appreciated that by providing abutment blocks 134, it is convenient for the cartridge 2 to be rotated exactly 90 degrees, so that the slide 21 mates with the other slide slot 132.

Preferably, the compression bar 4 is sleeved outside the rotary bar 3, and the rotary bar 3 extends out of the top of the compression bar 4. It will be appreciated that the above-described,

preferably, the top of the rotating rod 3 is provided with a first handle 31, and the top of the pressing rod 4 is provided with a second handle 41.

Preferably, the valve body 2 has four contact surfaces 22, and a seal plate 23 is provided on the contact surfaces 22.

It is worth mentioning that the sealing plate 23 is detachably connected to the valve element 2, and when the valve element needs to be repaired, the sealing effect of the valve element 2 can be effectively improved by replacing the sealing plate 23.

Preferably, a positioning hole 131 is formed at the lower part of the switching chamber 13, and a positioning protrusion 24 matched with the positioning hole 131 is formed at the bottom of the valve core 2. By providing the positioning hole 131 and the lower protrusion 24, the valve element 2 can be stably sealed in the pipe 11 and the pipe 12.

The working mode of the invention is as follows: the valve core 2 is controlled to move up and down by rotating the compression bar 4, so that the on-off of the gate valve 100 is controlled, the switching cavity 13 and the rotary bar 3 are arranged, the trapezoidal table-shaped valve core 2 is arranged, so that the abutting surfaces of the valve core 2 and the inlet 11 and the outlet 12 can be switched by rotating the valve core 2, so that another pair of sealing plates 23 can be switched after the sealing plate 23 on one side is deformed, specifically, the compression bar 4 is rotated to move the valve core 2 upwards, when the valve core 2 moves to the top, as shown in fig. 4 to 6, namely when the slide block 21 is positioned in the avoiding part 133, the valve core 2 can be rotated by 90 degrees to switch another set of opposite sealing plates 23, and because the switching process is completed in the valve body 1, the switching can be completed only when the gate valve 100 is opened, namely, the working surface of the valve core 2 can be switched, the gate valve 100 does not need to, the duration of use of the gate valve 100 is extended.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.