Bevel gear flange type single-disc gate valve

Abstract

The bevel gear flange type single gate plate gate valve comprises a valve body, a valve cover, a valve rod and a gate plate, a flow channel is formed in the valve body, a valve port is formed in the flow channel, the valve cover is arranged on the valve body in a covering mode, the valve rod penetrates through the valve cover, the end of the valve rod is connected with the gate plate, and the valve rod drives the gate plate to move up and down to be used for blocking or opening the valve port. A rotatable inner threaded pipe is further arranged in the valve cover, the valve rod penetrates into the inner threaded pipe to be in threaded connection, a first bevel gear is arranged at the end of the inner threaded pipe, an end cover is further arranged on the upper end face of the valve cover, a transmission shaft is arranged on the end cover, and a second bevel gear meshed with the first bevel gear in a matched mode is arranged at one end of the transmission shaft. The valve port comprises an upper valve port body and a lower valve port body, a first elastic sealing ring assembly is arranged between the peripheral wall of the gate plate and the inner wall of the upper valve port body, and a second elastic sealing ring assembly is arranged between the peripheral wall of the gate plate and the inner wall of the lower valve port body. Therefore, the technical effects of being convenient to operate and capable of avoiding leakage are achieved.

Description

Technical Field

[0001] The utility model relates to a valve, in particular to a bevel gear flange type single-disc gate valve. Background Art

[0002] The gate valve is an opening and closing device. The movement direction of the gate valve is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled.

[0003] The rotating disk that controls the gate of a traditional gate valve is located at the top of the gate valve, which occupies a large upper space. When used in a high installation position, it is very inconvenient to operate. At the same time, the gate inside the gate valve will wear out between the valve port during the up and down movement, resulting in leakage in the closed state. Utility Model Content

[0004] In order to solve the above problems, the purpose of the utility model is to provide a bevel gear flange type single-disc gate valve which is easy to operate and can avoid leakage.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bevel gear flange type single-disc gate valve, comprising a valve body, a valve cover, a valve stem and a gate plate, wherein a flow channel is arranged in the valve body, a valve port is arranged in the flow channel, the valve cover is arranged on the valve body, the valve stem passes through the valve cover, the end of the valve stem is connected to the gate plate, the valve stem drives the gate plate to move up and down to block or open the valve port, the valve cover is also provided with a rotatable internal threaded pipe, the valve stem is inserted into the internal threaded pipe for internal threaded connection, and a vertical threaded pipe is arranged in the valve cover to cooperate with the valve stem Track, the valve stem is vertically guided and moved along the vertical track, the end of the internal threaded tube is equipped with a first bevel gear, the upper end surface of the valve cover is also equipped with an end cover, a transmission shaft is arranged on the end cover, one end of the transmission shaft is equipped with a second bevel gear meshing with the first bevel gear, the other end of the transmission shaft is equipped with a rotating disk, the valve port includes an upper valve port and a lower valve port, a first elastic sealing ring assembly is arranged between the peripheral wall of the gate plate and the inner wall of the upper valve port, and a second elastic sealing ring assembly is arranged between the peripheral wall of the gate plate and the inner wall of the lower valve port.

[0006] The first elastic sealing ring assembly includes a groove arranged around the outer wall of the gate along its contour, and a rubber elastic sealing ring is arranged on the groove. The cross-section of the rubber elastic sealing ring is square, and a first sealing plate is arranged on the outward end surface of the rubber elastic sealing ring. A second sealing plate is also arranged on the first sealing plate. The area of ​​the second sealing plate is smaller than that of the first sealing plate. The first sealing plate blocks the opening of the groove, and the second sealing plate is used to block the upper valve port.

[0007] The second elastic sealing ring assembly includes an elastic groove at the lower part of the gate plate, a third sealing plate is provided on the outer wall of the elastic groove at the lower part of the gate plate corresponding to the third sealing plate, and a fourth sealing plate is also provided on the third sealing plate. The area of ​​the fourth sealing plate is smaller than that of the third sealing plate, and the fourth sealing plate is used to block the lower valve port.

[0008] The beneficial effect of the utility model is that the side installation of the rotating disk can be realized by the first bevel gear and the second bevel gear, which effectively improves the convenience of operation, and the first elastic sealing ring assembly and the second elastic sealing ring assembly respectively compensate for the wear amount by elasticity, so that the gate plate can always tightly block the valve port, thus achieving the technical effect of convenient operation and avoiding leakage.

[0009] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A three-dimensional diagram of a specific implementation of the utility model;

[0011] Figure 2 for Figure 1 A magnified view of middle;

[0012] Figure 3 for Figure 1 Enlarged view of B. DETAILED DESCRIPTION

[0013] The present invention is specifically described below through embodiments, which are only used to further illustrate the present invention and should not be construed as limiting the protection scope of the present invention.

[0014] like Figure 1 — Figure 3 As shown, this embodiment discloses a bevel gear flange type single-disc gate valve, including a valve body 1, a valve cover 2, a valve stem 3 and a gate plate 4. A flow channel 11 is provided in the valve body 1, and a valve port 12 is provided in the flow channel 11. The valve cover 2 is covered on the valve body 1, and the valve stem 3 passes through the valve cover 2. The end of the valve stem 3 is connected to the gate plate 4. The valve stem 3 drives the gate plate 4 to move up and down to block or open the valve port 12. A rotatable internal threaded pipe 5 is also configured in the valve cover 2. The valve stem 3 penetrates into the internal threaded pipe 5 for internal thread connection. A vertical track matching the valve stem 3 is provided in the valve cover 2. The valve stem 3 is vertically guided and moved along the vertical track, the end of the internal threaded tube 5 is provided with a first bevel gear, the upper end surface of the valve cover 2 is also provided with an end cover 7, a transmission shaft is provided on the end cover 7, one end of the transmission shaft is provided with a second bevel gear meshing with the first bevel gear, the other end of the transmission shaft is provided with a rotating disk 6, the valve port 12 includes an upper valve port 121 and a lower valve port 122, a first elastic sealing ring assembly 8 is provided between the peripheral wall of the gate plate and the inner wall of the upper valve port 121, and a second elastic sealing ring assembly 9 is provided between the peripheral wall of the gate plate 4 and the inner wall of the lower valve port 122.

[0015] The first elastic sealing ring assembly 8 includes a groove 81 arranged on the outer wall of the gate plate 4 along its contour, and a rubber elastic sealing ring 82 is arranged on the groove 81. The cross-section of the rubber elastic sealing ring 82 is square, and a first sealing plate 83 is arranged on the outward end surface of the rubber elastic sealing ring 82. A second sealing plate 84 is also arranged on the first sealing plate 83. The area of ​​the second sealing plate 84 is smaller than that of the first sealing plate 83. The first sealing plate 83 blocks the opening of the groove 81, and the second sealing plate 84 is used to block the upper valve port 121. After the friction and wear between the second sealing plate 84 and the upper valve port, the wear amount can be compensated by the elastic force of the rubber elastic sealing ring, which can effectively avoid leakage from the upper valve port.

[0016] The second elastic sealing ring assembly 9 includes a retractable elastic groove 91 provided at the lower part of the gate plate 4, a third sealing plate 92 is provided on the outer wall of the elastic groove 91 at the lower part of the gate plate 4, and a fourth sealing plate 93 is further provided on the third sealing plate 92. The area of ​​the fourth sealing plate 93 is smaller than that of the third sealing plate 92. The fourth sealing plate 93 is used to block the lower valve port 122. After the friction and wear between the fourth sealing plate and the lower valve port, the elastic groove can be compensated by the outward elastic expansion of the elastic groove.

[0017] Among them, the first sealing plate, the second sealing plate, the third sealing plate and the fourth sealing plate are respectively made of rubber materials, and of course they can also be made of metal materials. The gate plate is made of metal, and the end cover part also includes a bracket, which is connected to the valve body through a flange structure.

[0018] The valve cover and the valve body are connected via a flange, and the end cover and the valve cover are connected via a flange.

[0019] By adopting the above technical scheme, the side installation of the rotating disk 6 can be achieved through the first bevel gear and the second bevel gear, which effectively improves the convenience of operation, and the first elastic sealing ring assembly 8 and the second elastic sealing ring assembly 9 respectively compensate for the wear through elasticity, so that the gate plate 4 can always tightly block the valve port 12, thereby achieving the technical effect of convenient operation and avoiding leakage.

[0020] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0021] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A bevel gear flange type single-disc gate valve, comprising a valve body, a valve cover, a valve stem and a gate plate, wherein a flow channel is provided in the valve body, a valve port is provided in the flow channel, the valve cover is provided on the valve body, the valve stem passes through the valve cover, and the end of the valve stem is connected to the gate plate, characterized in that: The valve stem drives the gate plate to move up and down to block or open the valve port. The valve cover is also provided with a rotatable internal threaded tube, and the valve stem is inserted into the internal threaded tube for connection. A vertical track matching the valve stem is provided in the valve cover, and the valve stem moves vertically along the vertical track. The end of the internal threaded tube is provided with a first bevel gear, and the upper end surface of the valve cover is also provided with an end cover, and a transmission shaft is provided on the end cover. One end of the transmission shaft is provided with a second bevel gear meshing with the first bevel gear, and the other end of the transmission shaft is provided with a rotating disk. The valve port includes an upper valve port and a lower valve port, and a first elastic sealing ring assembly is provided between the peripheral wall of the gate plate and the inner wall of the upper valve port, and a second elastic sealing ring assembly is provided between the peripheral wall of the gate plate and the inner wall of the lower valve port.

2. The bevel gear flange type single disc gate valve according to claim 1, characterized in that: The first elastic sealing ring assembly includes a groove arranged around the outer wall of the gate along its contour, and a rubber elastic sealing ring is arranged on the groove. The cross-section of the rubber elastic sealing ring is square, and a first sealing plate is arranged on the outward end surface of the rubber elastic sealing ring. A second sealing plate is also arranged on the first sealing plate. The area of ​​the second sealing plate is smaller than that of the first sealing plate. The first sealing plate blocks the opening of the groove, and the second sealing plate is used to block the upper valve port.

3. The bevel gear flange type single disc gate valve according to claim 1, characterized in that: The second elastic sealing ring assembly includes an elastic groove at the lower part of the gate plate, a third sealing plate is provided on the outer wall of the elastic groove at the lower part of the gate plate corresponding to the third sealing plate, and a fourth sealing plate is also provided on the third sealing plate. The area of ​​the fourth sealing plate is smaller than that of the third sealing plate, and the fourth sealing plate is used to block the lower valve port.

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