Protective device for valve positioner

Abstract

The protective device for the valve positioner is provided with a bottom plate, a circle of surrounding plates are arranged on the periphery of the bottom plate along the edge, and first notches are formed in the surrounding plates on the left side and the right side respectively. A mounting table is arranged in the middle of the bottom plate and protrudes out of the bottom plate, and a mounting hole is formed in the mounting table. A cover box is further arranged, the shape of the edge of the cover box is consistent with that of the bottom plate, the edge of the bottom of the cover box is inserted into the inner side of the surrounding plate and covers the bottom plate below, second notches are formed in the left side and the right side of the bottom of the cover box, the first notches and the second notches are overlapped together to form through holes, and an air inlet pipe is further arranged at the top of the cover box. The air inlet pipe is used for introducing compressed air; after the cover box is additionally arranged, water can be prevented from splashing, and a heat source can be isolated; according to the utility model, compressed air is added for purging, so that water vapor in the cover box can be blown away; and meanwhile, the surrounding environment of the equipment can be cooled, and it is guaranteed that the equipment is in an ideal working environment.

Description

Technical Field

[0001] The utility model relates to the technical field of valve positioner equipment parts and components, in particular to a protective device for a valve positioner. Background Art

[0002] The valve positioner is the main component of the pneumatic control valve. As the name implies, it is installed on the valve. It improves the accuracy, reliability and precision of the valve by receiving the output signal of the control valve. That is, it is used in conjunction with the control valve to improve the performance of the valve, control some deviations caused by the operation of the mechanical device, and then calibrate it to make the work smoother and more accurate. The working principle of the valve positioner is to compare the valve displacement signal with the output signal of the controller. If there is a deviation, the output signal is changed to correspond to the valve stem displacement.

[0003] The use of valve positioners can improve valve performance, but valves can be installed under any working conditions. Some working conditions may be extreme environments such as high temperature and water splashing, which may cause the valve positioner to fail to reach its normal service life, thereby increasing spare parts costs and maintenance work. Utility Model Content

[0004] The purpose of the utility model is to provide a protective device for a valve positioner in view of the above situation, which can better ensure the safe and efficient use of the valve positioner.

[0005] The specific scheme of the utility model is: a protective device for a valve positioner, comprising a bottom plate, a circle of enclosure plates are arranged along the edges of the four sides of the bottom plate, and first notches are opened on the enclosure plates on the left and right sides; a mounting platform is arranged in the middle part of the bottom plate, the mounting platform protrudes from the bottom plate, and a mounting hole is arranged on the mounting platform; a cover box is also provided, the edge shape of the cover box is consistent with the shape of the bottom plate, the bottom edge of the cover box is inserted into the inner side of the enclosure plate and covers the bottom plate underneath, second notches are arranged on the left and right sides of the bottom of the cover box, the first notch and the second notch overlap to form a through hole, and an air inlet pipe is also arranged on the top of the cover box, and the air inlet pipe is used to introduce compressed air.

[0006] Furthermore, a shut-off valve is also provided on the air intake pipe of the utility model, and the air intake pipe is connected to an external compressed air source.

[0007] Furthermore, in the utility model, the bottom plate is in a rectangular shape, and the cover box is in a cuboid shape.

[0008] Furthermore, in the present invention, the first notch and the second notch are both U-shaped or circular hole-shaped.

[0009] Furthermore, the installation platform described in the utility model is also provided with a slope surface around it, and the slope surface is inclined from the middle to the surroundings, and the slope surface is higher in the middle and lower around.

[0010] Beneficial effects of the utility model:

[0011] (1) After adding a cover box, the utility model can prevent water splashing and isolate heat sources;

[0012] (2) The utility model adds compressed air blowing, which can blow away the water vapor in the cover box; at the same time, it can cool the surrounding environment of the equipment to ensure that the equipment is in an ideal working environment;

[0013] (3) The connection part for the positioner in the middle of the base plate is slightly higher to ensure that even if water enters the device, it can effectively prevent water from entering the valve positioner and causing damage to it. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main viewing direction structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the utility model in a top view;

[0016] Figure 3 It is a structural schematic diagram of the utility model after the cover box and the bottom plate are separated up and down.

[0017] In the figure: 1 - enclosure, 2 - cover box, 3 - air intake pipe, 4 - cut-off valve, 5 - second notch, 6 - slope surface, 7 - first notch, 8 - bottom plate, 9 - mounting hole, 10 - mounting platform. DETAILED DESCRIPTION

[0018] The following will be combined with the accompanying drawings of the utility model to clearly and completely describe the technical solution of the utility model. It is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the utility model. In the description of the utility model, it should be noted that the terms "upper", "lower", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when used, which is only for the convenience of describing the utility model or simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0019] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; 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 communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] See also Figure 1 to Figure 3 The utility model is a protective device for a valve positioner, which has a bottom plate 8, a circle of enclosures 1 are arranged along the edges of the bottom plate, and the enclosures on the left and right sides are provided with first notches 7; a mounting platform 10 is arranged in the middle part of the bottom plate, the mounting platform protrudes from the bottom plate, and the mounting platform is provided with mounting holes 9; a cover box 2 is also provided, and the edge shape of the cover box is consistent with the shape of the bottom plate. Further, the bottom plate in the utility model is rectangular, and the cover box is rectangular. The bottom edge of the cover box is inserted inside the enclosure and covers the bottom plate below. Second notches 5 are arranged on the left and right sides of the bottom of the cover box. The first notch and the second notch overlap to form a through hole. An air intake pipe 3 is also provided on the top of the cover box, and the air intake pipe is used to introduce compressed air. Further, a shut-off valve 4 is also installed on the air intake pipe in the utility model, and the air intake pipe is connected to an external compressed air source. Further, the first notch and the second notch in the utility model are both U-shaped or circular. Furthermore, the installation platform described in the utility model is also provided with a slope surface 6 around it, and the slope surface is inclined from the middle to the surroundings, and the slope surface is high in the middle and low around. Such a design can be used for internal drainage and can also reduce water accumulation.

[0021] The specific implementation of the utility model is as follows:

[0022] (1) First, carry out specific dimensional mapping of the valve positioner;

[0023] (2) Find a reasonable installation method based on the structure of the valve positioner, and specifically install the entirety of the utility model between the positioner and the mounting bracket, close to the valve positioner;

[0024] (3) When making the protective device, i.e. the entire utility model, the opening size of the mounting hole on the bottom plate must conform to the screw hole of the locator;

[0025] (4) During the overhaul period, the cover box is installed. The cover box and the base plate can be connected together by welding or screwing, and compressed air is connected;

[0026] (5) Put into operation and continuously improve during operation.

[0027] In actual use, the valve positioner is placed on the mounting table and covered with a cover box.

[0028] After the utility model adds a cover box, it can prevent heavy water splashing and isolate heat sources; the utility model adds compressed air blowing to blow away the water vapor in the cover box; at the same time, it can cool the surrounding environment of the equipment to ensure that the equipment is in an ideal working environment; the connection part for the positioner in the middle of the bottom plate, that is, the installation platform, is set slightly higher to ensure that even if the device is flooded, it can effectively prevent water from entering the valve positioner and causing damage to it.

[0029] The technical solution provided by the utility model can effectively solve the shortcomings of the existing valve positioner when used in harsh environments, and provide a set of protective devices, which can make the valve positioner work accurately and ensure the cooling effect of fast cooling. At the same time, the valve positioner is purged with compressed air to put the positioner in a more ideal working environment, thereby increasing the service life of the equipment and reducing the cost of spare parts.

Claims

1. A protective device for a valve positioner, characterized in that: It has a bottom plate, a circle of enclosures are arranged along the edges of the four sides of the bottom plate, and the enclosures on the left and right sides are each provided with a first notch; a mounting platform is provided in the middle part of the bottom plate, the mounting platform protrudes from the bottom plate, and the mounting platform is provided with a mounting hole; a cover box is also provided, the edge shape of the cover box is consistent with the shape of the bottom plate, the bottom edge of the cover box is inserted on the inner side of the enclosure and covers the bottom plate underneath, second notches are provided on the left and right sides of the bottom of the cover box, the first notch and the second notch overlap together to form a through hole, and an air inlet pipe is also provided on the top of the cover box, and the air inlet pipe is used to introduce compressed air.

2. A protective device for a valve positioner according to claim 1, characterized in that: The air inlet pipe is also provided with a cut-off valve, and the air inlet pipe is connected to an external compressed air source.

3. A protective device for a valve positioner according to claim 1, characterized in that: The bottom plate is in a rectangular shape, and the cover box is in a cuboid shape.

4. A protective device for a valve positioner according to claim 1, characterized in that: The first notch and the second notch are both U-shaped or circular hole-shaped.

5. The protective device for a valve positioner according to claim 1, characterized in that: The installation platform is also provided with a slope surface around it, and the slope surface is inclined from the middle to the surrounding areas, and the slope surface is higher in the middle and lower around it.

Images