An eccentric hole type gate valve structure

Abstract

The present invention discloses an eccentric hole type gate valve structure, including a valve body, a valve cover, a valve stem, a gate plate, and a hand wheel; the valve body is respectively provided with a communicating water inlet hole and a water outlet hole, the valve cover forms a positioning connection between the valve stem and the gate plate, and forms a gate plate accommodating cavity with the valve body to accommodate the gate plate when it rises and opens; the water inlet hole includes a water inlet connecting hole part and a water inlet eccentric connecting hole part, and the central axes of the two are not on the same central line, the water outlet hole includes a water outlet connecting hole part and a water outlet eccentric connecting hole part, and the central axes of the two are not on the same central line, the central axes of the water inlet connecting hole part and the water outlet connecting hole part are on the same central axis L1, the central axes of the water inlet eccentric connecting hole part and the water outlet eccentric connecting hole part are on the same central axis L2, and the central axis L2 is on the lower side of the central axis L1. The present invention reduces the height of the gate valve, reduces the materials processed by the gate valve accordingly, saves the processing cost, and is more convenient for the opening and closing operation of the gate valve.

Description

Technical Field

[0001] The invention relates to the technical field of gate valves, and in particular to an eccentric hole type gate valve structure. Background Art

[0002] Gate valves are widely used in pipeline transportation in various industries to control the cutting off or connecting of media. When in use, the hand wheel is generally turned to drive the gate plate to rise and fall through the valve stem to control the on-off status of the gate valve. Since the opening and closing of the existing gate plate are all achieved by the lifting of the gate plate, when the gate valve is opened and used, there must be enough height space inside the valve body to accommodate the rise of the gate plate, so that the existing gate valve is designed to be high, resulting in the existing structure of the gate valve on the market. The defects are: first, the high height design of the gate valve will require the installation space, otherwise it will affect the connection of the gate valve, which is very inconvenient for the connection and installation as well as the later opening and closing operations; second, the high design of the gate valve body requires relatively more materials, resulting in higher processing costs. Therefore, the gate valves on the existing market continue to solve the above defects. Summary of the invention

[0003] The purpose of the present invention is to solve the problems raised in the above background technology and provide an eccentric hole type gate valve structure.

[0004] In order to achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: an eccentric hole type gate valve structure, comprising a valve body, a valve cover, a valve stem, a gate plate, and a hand wheel; the valve body is provided with a water inlet hole and a water outlet hole which are communicated with each other, the valve cover forms a positioning connection between the valve stem and the gate plate, and forms a gate plate accommodating cavity with the valve body to accommodate the gate plate when it rises and opens, the gate plate is arranged in the valve body to control the on-off of the valve body; the water inlet hole comprises a water inlet connecting hole part and a water inlet eccentric connecting hole part, and the central axes of the two are not on the same central line, the water outlet hole comprises a water outlet connecting hole part, and the central axes of the two are not on the same central line, and the water outlet hole comprises a water outlet connecting hole part. The hole portion and the water outlet eccentric connecting hole portion, and the central axes of the two are not on the same central line, the central axes of the water inlet connecting hole portion and the water outlet connecting hole portion are on the same central axis L1, and the central axes of the water inlet eccentric connecting hole portion and the water outlet eccentric connecting hole portion are on the same central axis L2; ​​taking the central axis L1 of the water inlet connecting hole portion and the water outlet connecting hole portion as a reference, the central axis L2 and the gate plate accommodating cavity are respectively located on both sides of the central axis L1, that is, the central axis L2 is located on the lower side of the central axis L1.

[0005] In the above-mentioned eccentric hole type gate valve structure, the water inlet eccentric connecting hole portion corresponds to the water outlet eccentric connecting hole portion, and the diameters of the two are equal.

[0006] In the above-mentioned eccentric hole type gate valve structure, a plurality of diverting water grooves are symmetrically arranged on the inner wall of the water inlet eccentric connecting hole part, one end of the diverting water groove starts from the end face where the water inlet eccentric connecting hole part and the water inlet connecting hole part are connected, and the other end ends at the bottom of the inner wall of the water inlet eccentric connecting hole part.

[0007] In the above-mentioned eccentric hole gate valve structure, the diversion and redirection water channel is designed in a spiral trajectory from the starting end to the end end.

[0008] In the above-mentioned eccentric hole gate valve structure, the end of the diverter water channel communicating with the water inlet connecting hole is located on the upper side of the central axis of the water inlet eccentric connecting hole, and the ends of two symmetrical diverter water channels intersect to form a water diverting ridge.

[0009] In the above-mentioned eccentric hole type gate valve structure, a straight water flow groove is arranged at the bottom of the inner wall of the water inlet eccentric connecting hole, and the terminal parts of a plurality of diversion and redirection water flow grooves are gathered and connected to the straight water flow groove.

[0010] In the above-mentioned eccentric hole type gate valve structure, the cross section of the diversion and redirection water channel is trapezoidal in shape.

[0011] By adopting the above technical solution, the present invention has the following beneficial effects:

[0012] The water inlet hole in the present invention is composed of two parts: a water inlet connecting hole part and a water inlet eccentric connecting hole part; the water outlet hole is composed of two parts: a water outlet connecting hole part and a water outlet eccentric connecting hole part; the gate plate is correspondingly located between the water inlet eccentric connecting hole part and the water outlet eccentric connecting hole part; the gate plate is raised and lowered between the two to control the on-off state of the gate valve; the central axes of the water inlet connecting hole part and the water outlet connecting hole part are on the same central axis L1, and the central axes of the water inlet eccentric connecting hole part and the water outlet eccentric connecting hole part are on the same central axis L2; ​​since the central axis L2 and the gate plate accommodating cavity are respectively located on both sides of the central axis L1, that is, the central axis L2 is located on the lower side of the central axis L1, compared with the existing gate valve structure, the rising distance of the gate plate when it is fully opened is shortened, so the design height of the gate plate accommodating cavity can be reduced accordingly, that is, the height of the valve body is reduced, thereby reducing the material for gate valve processing and saving processing costs.

[0013] The present invention is provided with a plurality of diverting water channels symmetrically on the inner wall of the eccentric water inlet hole portion of the water inlet hole, the starting end of the diverting water channel is located on the upper side of the central axis of the eccentric water inlet hole portion, and the terminal end is to the bottom of the eccentric water inlet hole portion, and the diverting water channel is designed in a spiral trajectory from the starting end to the terminal end; therefore, part of the water flow impacted by the direct current of the water inlet hole portion can be guided through the diverting water channel to mainly guide the water flow impact force to act on the bottom position of the eccentric water inlet hole portion first, so that when the rising gate plate is opened, the water flow direction and the impact force first act on the bottom position of the gate plate accordingly, and as long as the gate plate is opened a little gap, most of the impact force of the water flow can be unloaded from the gap opened at the bottom of the gate plate, which is more labor-saving for the subsequent opening of the rising gate plate, and is very convenient for opening and closing operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a cross-sectional view of the present invention;

[0015] Figure 2 It is a three-dimensional cross-sectional view of the valve body in the present invention. DETAILED DESCRIPTION

[0016] The present invention will be further described in conjunction with the accompanying drawings.

[0017] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "inside", "outside", "bottom", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0018] like Figure 1 , Figure 2As shown, the present invention provides an eccentric hole type gate valve structure, including a valve body 1, a valve cover 2, a valve stem 3, a gate plate 4, and a hand wheel 5; the valve body 1 is respectively provided with a water inlet hole 6 and a water outlet hole 7 that are connected to each other, the gate plate 4 is arranged in the valve body 1 to control the on and off of the valve body 1, the valve cover 2 forms a positioning connection between the valve stem 3 and the gate plate 4, and forms a gate plate accommodating cavity 8 between the valve cover 2 and the valve body 1 to accommodate the gate plate 4 when it rises and opens; the water inlet hole 6 includes a water inlet connecting hole portion 9 and a water inlet eccentric connecting hole portion 10, and the central axes of the two are not on the same central line, the water outlet hole 7 includes a water outlet connecting hole portion 11 and a water outlet eccentric connecting hole portion 12, and the central axes of the two are not on the same central line, the central axes of the water inlet connecting hole portion 9 and the water outlet connecting hole portion 11 are on the same central axis L1, and the central axes of the water inlet eccentric connecting hole portion 10 and the water outlet eccentric connecting hole portion 12 are on the same central axis L2; The water eccentric connecting hole portion 10 corresponds to the water outlet eccentric connecting hole portion 12, and the diameters of the two are equal. When the gate valve is in a closed state, the gate plate 4 is located between the water inlet eccentric connecting hole portion 10 and the water outlet eccentric connecting hole portion 12 to cut off and close. When the gate valve is opened, the gate plate 4 rises under the drive of the valve stem 3 and slowly enters the gate plate accommodating chamber 8 to open; taking the central axis L1 of the water inlet connecting hole portion 9 and the water outlet connecting hole portion 11 as a reference, the central axis L2 and the gate plate accommodating chamber 8 are respectively located on both sides of the central axis L1, that is, the central axis L2 is located on the lower side of the central axis L1; thereby, the gate valve o can function normally when opened and closed, and the position of the water inlet eccentric connecting hole portion 10 and the water outlet eccentric connecting hole portion 12 is changed by design to reduce the stroke of the gate plate 4 rising and opening, thereby reducing the height of the valve body 1 and achieving the purpose of saving materials and reducing processing costs.

[0019] Furthermore, a plurality of diverting water channels 13 are symmetrically arranged on the inner wall of the water inlet eccentric hole portion 10, one end of the diverting water channel 13 starts from the end face where the water inlet eccentric hole portion 10 and the water inlet hole portion 9 are connected, and the other end ends at the bottom of the inner wall of the water inlet eccentric hole portion 10; such a design can divert and change the direct current impact of the water flowing in, and the cross-section of the diverting water channel 13 is a trapezoidal shape, which can divert and guide the direct current water as much as possible, and the water flow impacted by the direct current is changed to act on the bottom of the inner wall of the water inlet eccentric hole portion 10, that is, the position corresponding to the bottom when the gate plate 4 is closed. In this way, when reopening from the closed state, as long as the gate plate 4 rises to open a gap, the direct current impact force of the water flowing in will mainly pass through the bottom of the gate plate 4, which is more labor-saving for the subsequent continued lifting and opening, and is convenient for the opening and closing operation of the gate valve.

[0020] Furthermore, the diverter water groove 13 is designed in a spiral trajectory from the starting end to the end end. The spiral trajectory diverter water groove 13 can make the incoming water flow in the water inlet hole portion 9 form a swirl, and the end point of the swirl is at the bottom of the water inlet eccentric hole portion, thereby better guiding the direct current impact force of the water flow in the water inlet hole portion to the bottom of the water inlet eccentric hole portion.

[0021] Furthermore, one end of the diverter water groove 13 communicating with the water inlet connecting hole 9 is located on the upper side of the central axis of the water inlet eccentric connecting hole 10, and the ends of two symmetrical diverter water grooves 13 intersect to form a water diverter ridge 14; this mainly plays a role in guiding the water flow in the upper part of the water inlet eccentric connecting hole, because the water in the lower part itself is a direct current impacting the corresponding bottom, and the diverted flow formed by the water diverter ridge 14 cooperates, so that the direct current impact water in the upper part of the water inlet connecting hole can be better redirected.

[0022] Furthermore, a straight water groove 15 is provided at the bottom of the inner wall of the water inlet eccentric hole portion 10, and the terminal parts of several diversion and redirection water grooves 13 are gathered into the straight water groove 15, so that the water guided by the diversion and redirection water grooves 13 is gathered to form a corresponding bottom of the water inlet eccentric hole portion 10, and thus better corresponds to the bottom when the gate plate 4 is opened.

[0023] The above is a detailed introduction to an eccentric hole gate valve structure provided by an embodiment of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the technical solutions disclosed by the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation of the present invention.

Claims

1. An eccentric hole gate valve structure, comprising a valve body, a valve cover, a valve stem, a gate plate, and a hand wheel; the valve body is provided with a water inlet hole and a water outlet hole communicating with each other, the valve cover forms a positioning connection between the valve stem and the gate plate, and forms a gate plate accommodating cavity between the valve cover and the valve body to accommodate the gate plate when it rises and opens; the characteristics are: The water inlet hole includes a water inlet connecting hole portion and a water inlet eccentric connecting hole portion, and the central axes of the two are not on the same central line. The water outlet hole includes a water outlet connecting hole portion and a water outlet eccentric connecting hole portion, and the central axes of the two are not on the same central line. The central axes of the water inlet connecting hole portion and the water outlet connecting hole portion are on the same central axis L1, and the central axes of the water inlet eccentric connecting hole portion and the water outlet eccentric connecting hole portion are on the same central axis L2; ​​taking the central axes L1 of the water inlet connecting hole portion and the water outlet connecting hole portion as a reference, the central axis L2 and the gate plate accommodating cavity are respectively located on both sides of the central axis L1, that is, the central axis L2 is located on the lower side of the central axis L1; The inner wall of the water inlet eccentric connecting hole portion is symmetrically provided with a plurality of diverting water grooves, one end of which starts from the end surface where the water inlet eccentric connecting hole portion and the water inlet connecting hole portion are connected, and the other end ends at the bottom of the inner wall of the water inlet eccentric connecting hole portion, and the diverting water groove is designed in a spiral track from the starting end to the terminal end; One end of the diverting water channel communicating with the water inlet connecting hole is located on the upper side of the central axis of the water inlet eccentric connecting hole, and the ends of two symmetrical diverting water channels intersect to form a water diverting ridge; a straight water channel is provided at the bottom of the inner wall of the water inlet eccentric connecting hole, and the terminal ends of a plurality of diverting water channels are gathered and connected to the straight water channel; The water inlet eccentric connecting hole portion corresponds to the water outlet eccentric connecting hole portion, and the diameters of the two are equal, and the cross-section of the diversion and redirection water channel is a trapezoid.

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