Shearing valve of deslagging system

Abstract

The utility model relates to a shear valve of a deslagging system. The shear valve comprises a valve body, a movable valve seat, a gate plate, a valve rod, a protective inner cover and a protective outer cover. A guide mounting hole is formed in the protective outer cover, a jacking column is movably mounted in the guide mounting hole in a guiding manner, a connecting plate is arranged at one end, far away from the protective inner cover, of the jacking column, a through hole is formed in each of two ends of the connecting plate, an adjusting bolt is movably mounted in each through hole in a penetrating manner, and the adjusting bolts are in threaded connection with the protective outer cover. The rod portion of each adjusting bolt is sleeved with a compressed spring, one end of each compressed spring abuts against the head of the corresponding adjusting bolt, and the other end of each compressed spring abuts against the connecting plate. And the area of the cross section of the jacking column accounts for 1 / 5-1 / 3 of the area of the side plate surface of the protective outer cover. By means of the design, the adjusting efficiency is high, adjustment is very convenient, the guide columns can directly abut against the protective inner cover in the adjusting process, due to the fact that the area of the cross section of each guide column is large, the protective inner cover can be well and evenly pressed, and adjustment is very convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a shear valve for a slag discharge system. Background Art

[0002] The existing shear valve of the slag discharge system, as described in the Chinese invention patent application with application publication number CN 103557342 A previously applied by the applicant, comprises a valve body, a movable valve seat, a gate and a valve stem, wherein a protective inner cover is arranged on the outside of the gate in the valve body, and a protective outer cover is arranged outside the protective inner cover. A plurality of disc spring seats are threadedly connected on the protective outer cover, and disc springs are installed in the disc spring seats, one end of the disc spring presses on the disc spring seat, and the other end presses on the protective inner cover, and the sealing between the protective inner cover and the gate is realized by the elastic force of the disc spring, so as to prevent the medium from leaking from between the gate and the protective inner cover into the valve body.

[0003] However, when adjusting the sealing performance between the gate and the protective inner cover, the shear valve of the above structure needs to adjust all the disc spring seats, resulting in low adjustment efficiency. In addition, due to the large number of disc spring seats, it is impossible to ensure that the adjustment force of each disc spring seat is consistent, resulting in time-consuming and labor-intensive adjustment. Therefore, a new shear valve is needed to facilitate the adjustment of the preload force between the gate and the protective inner cover. Utility Model Content

[0004] The utility model aims to provide a shear valve for a slag discharge system which is convenient for adjusting the pre-tightening force between a gate plate and a protective inner cover to ensure sealing.

[0005] To achieve the above-mentioned purpose, a shear valve of a slag discharge system of the utility model adopts the following technical scheme: a shear valve, including a valve body, a movable valve seat, a gate plate and a valve stem, a protective inner cover is arranged in the valve body on the outer side of the gate plate, a protective outer cover is arranged outside the protective inner cover, a guide mounting hole is arranged on the protective outer cover, a push column is installed in the guide mounting hole for guiding movement, a connecting plate is arranged at one end of the push column away from the protective inner cover, a through hole is arranged at each end of the connecting plate, an adjusting bolt is movably installed in each through hole, and the adjusting bolt is threadedly connected to the protective outer cover; a compression spring is mounted on the rod of each adjusting bolt, one end of the compression spring presses on the head of the adjusting bolt, and the other end presses on the connecting plate; the cross-sectional area of ​​the push column accounts for 1 / 5-1 / 3 of the area of ​​the side plate surface of the protective outer cover.

[0006] The guide installation hole is a circular hole, and the cross section of the top pressure column is also circular.

[0007] The top pressure column and the connecting plate are connected together by screws to achieve a detachable connection between the two.

[0008] A groove is arranged on the end surface of the top pressure column away from the protective inner cover, the connecting plate is located in the groove, and the screw is connected to the bottom of the groove.

[0009] The protective outer cover is provided with a first positioning column and a second positioning column, and the connecting plate is provided with a first positioning hole corresponding to the first positioning column and a second positioning hole corresponding to the second positioning column.

[0010] The first positioning column and the second positioning column are both threadedly connected to the protective cover.

[0011] The beneficial effects of the utility model are as follows: when the sealing between the protective inner cover and the gate plate needs to be adjusted, the utility model only needs to adjust the two adjusting bolts at both ends of each connecting plate and then compress the compression spring to achieve the adjustment, and it is not necessary to adjust multiple disc spring seats on each side as in the prior art. This design not only has high adjustment efficiency, but also is very convenient to adjust. When adjusting, the guide column will directly press the protective inner cover. Since the cross-sectional area of ​​the guide column in this embodiment is large, it can press the protective inner cover well and evenly, and the adjustment is very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of an embodiment of a shear valve for a slag discharge system of the utility model;

[0013] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0014] Figure 3 yes Figure 1 A schematic diagram of the structure of the middle protective cover;

[0015] Figure 4 yes Figure 3 Schematic diagram of the structure from another angle. DETAILED DESCRIPTION

[0016] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0017] It should be noted that, unless otherwise defined, the technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0018] An embodiment of a slag discharge system shear valve of the utility model is as follows: Figure 1-Figure 4As shown, it includes a valve body 1, a movable valve seat 2, a gate plate 3 and a valve stem 4. A protective inner cover 7 is arranged on the outside of the gate plate in the valve body, and a protective outer cover 8 is arranged outside the protective inner cover. A connecting plate 14 is arranged on the protective outer cover. The connecting plate 14 can be fixed to the valve body by bolts to fix the protective outer cover. A medium channel 5 is arranged on the valve body, a flow channel hole 6 is arranged on the gate plate, and an operating mechanism (not shown in the figure) is arranged on the upper end of the valve stem. The operating mechanism is a prior art, and its specific structure is not described in detail in this embodiment. In this embodiment, a guide installation hole 9 is arranged on the protective outer cover 8, and a top pressure column 10 is installed in the guide installation hole for guiding movement. The guide installation hole is a circular hole, and the cross section of the top pressure column is also circular, which is convenient for installation and guiding movement, and has minimal wear. The cross-sectional area of ​​the top pressure column accounts for 1 / 5-1 / 3 of the area of ​​the side plate surface of the protective outer cover. In this embodiment, the cross-sectional area of ​​the top pressure column accounts for 1 / 4 of the area of ​​the side plate surface of the protective outer cover.

[0019] A connecting plate 11 is provided at one end of the pressure column away from the protective inner cover, and a through hole is provided at each end of the connecting plate. An adjusting bolt 12 is movably installed in each through hole, and the adjusting bolt is threadedly connected to the protective outer cover. Specifically, a groove is provided on the end surface of the pressure column away from the protective inner cover, the connecting plate is located in the groove, and the screw is connected to the bottom of the groove. With this design, the connecting plate and the pressure column partially overlap in the horizontal direction, which can reduce the overall length of the pressure column and the connecting plate while ensuring the length of the pressure column, and can reduce the volume occupied by the two. In this embodiment, a compression spring 13 is mounted on the rod of each adjusting bolt 12, one end of the compression spring 13 presses on the head of the adjusting bolt 12, and the other end presses on the connecting plate 11. The pressure column and the connecting plate are connected together by screws 15 to achieve a detachable connection between the two. In this embodiment, the number of screws is three and they are arranged in a triangle.

[0020] During use, when it is necessary to adjust the sealing between the gate plate and the protective inner cover, it is only necessary to adjust the adjusting bolts at both ends of the connecting plates on each side. The adjusting bolts compress the compression springs. The compression springs increase the pre-tightening force of the protective inner cover, thereby achieving the pre-tightening force between the protective inner cover and the gate plate, achieving the sealing cooperation between the two, and preventing the medium from leaking from between the gate plate and the protective inner cover into the inner cavity of the valve body. This adjustment is convenient and efficient.

[0021] In the above description of this specification, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected" or "connected" should be understood in a broad sense. For example, with regard to the term "connection", it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly defined in this specification, those skilled in the art can understand the specific meanings of the above terms in this utility model according to the specific circumstances.

[0022] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "center", "longitudinal", "lateral", "clockwise" or "counterclockwise", etc., which indicate the orientation or position relationship, are based on the orientation or position relationship shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or position relationship terms cannot be understood or interpreted as limitations on the scheme of the utility model.

[0023] In addition, the terms "first" or "second" used in this specification to refer to numbers or ordinals are only used for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this specification, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0024] In other embodiments of the utility model, the cross-sectional area of ​​the top pressure column accounts for 1 / 5 of the area of ​​the side panel of the protective outer cover; the cross-sectional area of ​​the top pressure column accounts for 1 / 3 of the area of ​​the side panel of the protective outer cover; in order to facilitate the installation of the adjusting bolt, a first positioning column and a second positioning column are provided on the protective outer cover, and a first positioning hole corresponding to the first positioning column and a second positioning hole corresponding to the second positioning column are provided on the connecting plate. At this time, the first positioning column and the second positioning column can be threadedly connected to the protective outer cover, or welded to the protective outer cover; the compression spring can also be replaced by a disc spring.

Claims

1. A shear valve for a slag discharge system, comprising a valve body, a movable valve seat, a gate and a valve stem, wherein a protective inner cover is arranged outside the gate in the valve body, and a protective outer cover is arranged outside the protective inner cover, and the characteristics are: The protective outer cover is provided with a guide mounting hole, in which a pressure column is installed for guiding movement, a connecting plate is provided at one end of the pressure column away from the protective inner cover, and a through hole is provided at each end of the connecting plate, and an adjusting bolt is movably installed in each through hole, and the adjusting bolt is threadedly connected to the protective outer cover; a compression spring is mounted on the rod of each adjusting bolt, and one end of the compression spring presses on the head of the adjusting bolt and the other end presses on the connecting plate; the cross-sectional area of ​​the pressure column accounts for 1 / 5-1 / 3 of the area of ​​the side plate surface of the protective outer cover.

2. The shear valve of the slag discharge system according to claim 1, characterized in that: The guide installation hole is a circular hole, and the cross section of the top pressure column is also circular.

3. The shear valve of the slag discharge system according to claim 1, characterized in that: The top pressure column and the connecting plate are connected together by screws to achieve a detachable connection between the two.

4. The shear valve of the slag discharge system according to claim 3, characterized in that: A groove is arranged on the end surface of the top pressure column away from the protective inner cover, the connecting plate is located in the groove, and the screw is connected to the bottom of the groove.

5. The shear valve of the slag discharge system according to claim 3 or 4, characterized in that: The protective outer cover is provided with a first positioning column and a second positioning column, and the connecting plate is provided with a first positioning hole corresponding to the first positioning column and a second positioning hole corresponding to the second positioning column.

6. The shear valve of the slag discharge system according to claim 5, characterized in that: The first positioning column and the second positioning column are both threadedly connected to the protective cover.

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