Overtemperature prevention device for pneumatic valve positioner

Abstract

The utility model provides an over-temperature prevention device for a pneumatic valve positioner, which comprises a first vertical plate and a second vertical plate, a mounting hole is formed in the first vertical plate, a fastener penetrates through the mounting hole to fix the first vertical plate on a fixing seat of an air cylinder, and the top of the first vertical plate is vertically connected with a transverse plate; the bottom of the second vertical plate is vertically connected with the end, away from the first vertical plate, of the transverse plate, the second vertical plate is made of a heat insulation material, and a heat insulation block with a preset thickness is arranged on the transverse plate between the second vertical plate and the air cylinder; and one end of the bearing plate is horizontally arranged on the side wall, away from the first vertical plate, of the second vertical plate, and the bearing plate is used for bearing the pneumatic valve positioner. According to the pneumatic valve positioner, heat of the air cylinder is prevented from being conducted to the pneumatic valve positioner as far as possible, so that the pneumatic valve positioner is not affected by the heat of the air cylinder as far as possible, normal operation of the pneumatic valve positioner is ensured, and the service life of the pneumatic valve positioner is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of pneumatic valve positioners, and in particular to an over-temperature protection device for a pneumatic valve positioner. Background Art

[0002] Pneumatic valve positioner is one of the important accessories and parts of pneumatic control valve. Pneumatic valve positioner receives weak current signals such as 4-20mA from the controller or control system, and transmits air signals to the pneumatic actuator (usually a cylinder) to control the valve position. It is used in conjunction with the pneumatic control valve to form a closed-loop control circuit, which is used to convert the DC current signal given by the control system into an air signal to drive the control valve, control the action of the pneumatic control valve, and provide feedback based on the opening of the pneumatic control valve, so that the valve position of the pneumatic control valve can be correctly positioned according to the control signal output by the system. It can be used in various industrial automation process control fields.

[0003] In actual use, the pneumatic valve positioner is fixed to the cylinder body by fastening bolts. During normal operation, the cylinder temperature in the boiler area is as high as 60-80℃, and the temperature of the cylinder is transferred to the pneumatic valve positioner through heat conduction, making the temperature of the pneumatic valve positioner exceed the working temperature (not higher than 45℃). The pneumatic valve positioner is a valuable precision equipment, and its working environment temperature affects its service life. Therefore, under the influence of high temperature environment, the seal of the pneumatic valve positioner is prone to aging, resulting in leakage and cross-flow of the pneumatic valve positioner, and the electronic components in the pneumatic valve positioner are damaged by high temperature, resulting in the actuator not being able to operate normally. Utility Model Content

[0004] The present application provides an over-temperature protection device for a pneumatic valve positioner, which is used to solve the technical problems described in the above background technology.

[0005] In order to solve the above technical problems, this application adopts the following technical solutions:

[0006] The present application provides an over-temperature protection device for a pneumatic valve positioner, comprising:

[0007] A first vertical plate, wherein a mounting hole is formed on the first vertical plate, wherein the mounting hole is used for a fastener to penetrate the first vertical plate so as to fix the first vertical plate on a fixing seat of the cylinder, and a horizontal plate is vertically connected to the top of the first vertical plate;

[0008] A second vertical plate, the bottom of which is vertically connected to an end of the horizontal plate away from the first vertical plate, the second vertical plate is made of a heat-insulating material and a heat-insulating block of a preset thickness is arranged on the horizontal plate between the second vertical plate and the cylinder;

[0009] A bearing plate, one end of which is horizontally arranged on a side wall of the second vertical plate away from the first vertical plate, and is used to bear a pneumatic valve positioner.

[0010] Optionally, a plurality of baffles are arranged on the bearing plate, and the plurality of baffles are vertically arranged on the upper surface of the bearing plate and enclosed together with the second vertical plate to form an accommodating space capable of accommodating the pneumatic valve positioner;

[0011] A plurality of guide through holes are formed on each baffle plate, a heat conducting rod is passed through each guide through hole, and a heat conducting plate capable of abutting against the housing of the pneumatic valve positioner is provided at one end of the heat conducting rod located in the accommodating space.

[0012] Optionally, the height of each baffle is 1 / 3 to 1 / 2 of the height of the pneumatic valve positioner.

[0013] Optionally, a plurality of heat dissipation holes are provided on the carrier plate;

[0014] The supporting plate is made of a heat-conducting material and a heat dissipation fin is arranged on its lower surface.

[0015] Optionally, a cooling fan is provided on a side wall of the second vertical plate away from the first vertical plate.

[0016] Optionally, the insulation blocks are made of phenolic resin;

[0017] The preset thickness is 48mm-53mm.

[0018] Optionally, there are multiple mounting holes and all of the multiple mounting holes are first threaded through holes, and the cylinder is provided with multiple second threaded through holes corresponding to the multiple mounting holes one by one;

[0019] The fasteners include fastening bolts and nuts;

[0020] The screw rod end of the fastening bolt passes through the mounting hole and the second threaded through hole in sequence, and the nut is screwed on the screw rod of the fastening bolt close to the cylinder.

[0021] The anti-overheating device for the pneumatic valve positioner provided by the present application is a device that penetrates the mounting hole on the first vertical plate through a fastener, thereby fixing the first vertical plate on the fixed seat of the cylinder, and the arrangement of the horizontal plate, the second vertical plate and the bearing plate prolongs the interval between the pneumatic valve positioner on the bearing plate and the cylinder, prolongs the time for the heat on the cylinder to be transmitted to the pneumatic valve positioner, and at the same time, the arrangement of the heat insulation block on the horizontal plate blocks the heat of the cylinder from being transmitted to the pneumatic valve positioner, and avoids the heat of the cylinder from being transmitted to the pneumatic valve positioner as much as possible, so that the pneumatic valve positioner is as unaffected by the heat of the cylinder as possible, ensuring that the pneumatic valve positioner can operate normally, and prolonging the service life of the pneumatic valve positioner. In addition, the pneumatic valve positioner is arranged on the bearing plate to facilitate the installation and disassembly of the pneumatic valve positioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A schematic diagram of the structure of an over-temperature protection device for a pneumatic valve positioner provided in one embodiment of the present application;

[0024] Figure 2 A schematic diagram of the structure of an over-temperature protection device for a pneumatic valve positioner provided in another embodiment of the present application;

[0025] Figure 3 A schematic diagram of the structure of an over-temperature protection device for a pneumatic valve positioner provided in another embodiment of the present application;

[0026] Figure 4 A schematic structural diagram of an over-temperature protection device for a pneumatic valve positioner provided in another embodiment of the present application.

[0027] In the figure: 100, first vertical plate; 101, mounting hole; 102, horizontal plate; 1021, insulation block; 200, fastener; 201, fastening bolt; 202, nut; 300, cylinder; 301, second threaded through hole; 400, second vertical plate; 401, cooling fan; 500, bearing plate; 501, baffle; 5011, guide through hole; 502, heat dissipation through hole; 503, heat dissipation fin; 600, pneumatic valve positioner; 700, accommodating space; 800, heat conducting rod; 801, heat conducting plate. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0029] refer to Figures 1 to 4 The present application provides an over-temperature protection device for a pneumatic valve positioner, comprising:

[0030] The first vertical plate 100 is provided with a mounting hole 101, and the mounting hole 101 is used for the fastener 200 to penetrate so as to fix the first vertical plate 100 on the fixing seat of the cylinder 300. The top of the first vertical plate 100 is vertically connected with a horizontal plate 102; wherein, the first vertical plate 100 and the horizontal plate 102 can be made of heat-insulating material, that is, the setting of the first vertical plate 100 can block the heat transfer of the cylinder 300, and the setting of the mounting hole 101 facilitates the installation of the first vertical plate 100 on the cylinder 300, thereby improving the convenience of installation of the first vertical plate 100.

[0031] The second vertical plate 400 has its bottom vertically connected to an end of the horizontal plate 102 away from the first vertical plate 100 . The second vertical plate 400 is made of a heat-insulating material and a heat-insulating block 1021 of a preset thickness is disposed on the horizontal plate 102 between the second vertical plate 400 and the cylinder 300 .

[0032] The bearing plate 500, one end of which is horizontally arranged on the side wall of the second vertical plate 400 away from the first vertical plate 100, is used to carry the pneumatic valve positioner. Among them, the purpose of the preset thickness is to ensure that the heat of the cylinder 300 is not transmitted to the pneumatic valve positioner 600 as much as possible. Therefore, the preset thickness value can be set according to actual needs, and this application does not make specific restrictions on it. In addition, the second vertical plate 400 can be made of heat-insulating material, the purpose is to prevent the heat of the insulation block 1021 from being transmitted to the pneumatic valve positioner 600 on the bearing plate 500, further blocking the heat of the cylinder 300 from being transmitted to the pneumatic valve positioner 600, thereby ensuring that the pneumatic valve positioner 600 can operate normally. The bearing plate 500 improves the convenience of installing the pneumatic valve positioner 600, and the first vertical plate 100, the horizontal plate 102 and the second vertical plate 400 can be integrally formed. This application does not further limit the connection method between the first vertical plate 100, the horizontal plate 102 and the second vertical plate 400.

[0033] The anti-overheating device for the pneumatic valve positioner provided in the present application penetrates the mounting hole 101 on the first vertical plate 100 through the fastener 200, so as to fix the first vertical plate 100 on the fixing seat of the cylinder 300. The arrangement of the horizontal plate 102, the second vertical plate 400 and the supporting plate 500 prolongs the interval between the pneumatic valve positioner 600 on the supporting plate 500 and the cylinder 300, prolongs the time for the heat from the cylinder 300 to be transmitted to the pneumatic valve positioner 600, and at the same time, the arrangement of the heat insulation block 1021 on the horizontal plate 102 blocks the heat from the cylinder 300 from being transmitted to the pneumatic valve positioner 600, thereby avoiding the heat from the cylinder 300 from being transmitted to the pneumatic valve positioner 600 as much as possible, so that the pneumatic valve positioner 600 is as unaffected by the heat of the cylinder 300 as possible, thereby ensuring the normal operation of the pneumatic valve positioner 600 and extending the service life of the pneumatic valve positioner 600. In addition, the pneumatic valve positioner 600 is disposed on the carrier plate 500 , which facilitates the installation and removal of the pneumatic valve positioner 600 .

[0034] In some embodiments, reference Figures 1 to 4 In the present application, a plurality of baffles 501 are arranged on the carrier plate 500, and the plurality of baffles 501 are vertically arranged on the upper surface of the carrier plate 500 and enclosed with the second vertical plate 400 to form an accommodating space 700 capable of accommodating the pneumatic valve positioner 600; wherein, the accommodating space 700 enclosed by the plurality of baffles 501 and the second vertical plate 400 can fix the pneumatic valve positioner 600, thereby improving the stability of the pneumatic valve positioner 600 on the carrier plate 500, thereby ensuring the stability of the pneumatic valve positioner 600 during operation.

[0035] Specifically, each baffle 501 is provided with a plurality of guide through holes 5011, and a heat conducting rod 800 is provided in each guide through hole 5011, and a heat conducting plate 801 capable of abutting against the shell of the pneumatic valve positioner 600 is provided at one end of the heat conducting rod 800 located in the accommodation space 700. The heat conducting plate 801 is sleeved on the heat conducting rod 800. The heat conducting rod 800 and the heat conducting plate 801 can be made of graphite, metal aluminum, etc., and can be set according to actual needs, and the present application does not specifically limit them.

[0036] In the above embodiment, one end of the heat-conducting rod 800 is passed through the guide through hole 5011 and extends into the accommodation space 700, and the heat-conducting plate 801 is sleeved on the heat-conducting rod 800, so that the heat-conducting plate 801 abuts against the shell of the pneumatic valve positioner 600. Compared with the heat-conducting rod 800, the contact area between the heat-conducting plate 801 and the pneumatic valve positioner 600 is larger. Therefore, through the arrangement of the heat-conducting plate 801 and the heat-conducting rod 800, the heat of the pneumatic valve positioner 600 can be transferred to the outside of the accommodation space 700 through the heat-conducting plate 801 and the heat-conducting rod 800, thereby reducing the temperature of the pneumatic valve positioner 600 itself and ensuring the normal operation and service life of the pneumatic valve positioner 600. The arrangement of multiple heat-conducting rods 800 improves the heat dissipation efficiency of the pneumatic valve positioner 600, and the number of heat-conducting rods 800 can be set according to actual needs, and this application does not specifically limit it.

[0037] In some embodiments, reference Figure 1 , the height of each baffle 501 in the present application is 1 / 3 to 1 / 2 of the height of the pneumatic valve positioner 600, which ensures that the pneumatic valve positioner 600 can be effectively fixed in the accommodating space 700 without affecting the installation of the gas circuit on the pneumatic valve positioner 600, thereby improving the stability of the operation process of the pneumatic valve positioner 600 and ensuring the normal installation of the pipeline on the pneumatic valve positioner 600. Therefore, the height value of the baffle 501 can be set according to actual needs, and therefore, the present application does not make specific restrictions on it.

[0038] In some embodiments, reference Figures 1 to 4 In the present application, a plurality of heat dissipation holes 502 are provided on the carrier plate 500; wherein, the heat at the bottom of the pneumatic valve positioner 600 in the accommodating space 700 and the heat emitted by the pneumatic valve positioner 600 in the accommodating space 700 can be dissipated through the plurality of heat dissipation holes 502, thereby achieving the heat dissipation in the accommodating space 700 while fixing the pneumatic valve positioner 600.

[0039] Specifically, the carrier plate 500 is made of a heat-conducting material and has heat-dissipating fins 503 on its lower surface. In order to improve the heat dissipation efficiency of the pneumatic valve positioner 600, a plurality of heat-dissipating fins 503 may be provided, and the specific number of the heat-dissipating fins 503 may be set according to actual needs, and the present application does not specifically limit it. The carrier plate 500 made of a heat-conducting material can not only support the pneumatic valve positioner 600, but also conduct the heat of the pneumatic valve positioner 600, and then dissipate the heat conducted to the carrier plate 500 through the plurality of heat-dissipating fins 503 provided thereon, thereby improving the heat dissipation efficiency of the pneumatic valve positioner 600 itself.

[0040] In some embodiments, reference Figure 2 and Figure 3 In the present application, a cooling fan 401 is disposed on the side wall of the second vertical plate 400 away from the first vertical plate 100. The cooling fan 401 blows air to the housing of the pneumatic valve positioner 600 facing the second vertical plate 400 to reduce the temperature of the housing of the pneumatic valve positioner 600 facing the second vertical plate 400, and the specifications and models of the cooling fan 401 can be set according to actual needs, so the present application does not specifically limit it.

[0041] In some embodiments, the insulation block 1021 and the insulation material in the present application are made of phenolic resin; wherein, phenolic resin has good thermal insulation performance, and its thermal conductivity is about 0.023W / (m·k), which is much lower than the inorganic and organic exterior wall insulation products commonly used in the market, and can achieve higher energy saving effect. The material of the insulation block 1021 is not limited to phenolic resin, as long as it can ensure the insulation performance of the insulation block 1021, the present application will not list them one by one here.

[0042] Specifically, the preset thickness is 48mm-53mm. During actual operation, the distance between the pneumatic valve positioner 600 and the cylinder 300 is approximately between 48mm-53mm. This not only ensures the normal operation of the cylinder 300 and the pneumatic valve positioner 600, but also slows down the heat conduction from the cylinder 300 to the pneumatic valve positioner 600. The preset thickness is the thickness of the insulation block 1021. The preset thickness enables the insulation block 1021 to be placed on the cross plate 102 between the pneumatic valve positioner 600 and the cylinder 300, ensuring that the insulation block 1021 blocks the heat of the cylinder 300 and prevents the heat emitted by the cylinder 300 from being conducted to the pneumatic valve positioner 600.

[0043] In some embodiments, reference Figure 1 and Figure 4 In the present application, there are multiple mounting holes 101 and all of the multiple mounting holes 101 are first threaded through holes, and the cylinder 300 is provided with multiple second threaded through holes 301 corresponding to the multiple mounting holes 101 one by one; wherein, the multiple mounting holes 101 and the multiple second threaded through holes 301 can ensure that the first vertical plate 100 and the cylinder 300 have multiple mounting positions, so that the first vertical plate 100 can be stably fixed on the fixing seat of the cylinder 300.

[0044] In addition, the fastener 200 includes a fastening bolt 201 and a nut 202; specifically, the screw end of the fastening bolt 201 passes through the mounting hole 101 and the second threaded through hole 301 in sequence, and the nut 202 is screwed on the screw of the fastening bolt 201 close to the cylinder, thereby achieving the fixation of the first vertical plate 100 and the cylinder 300. The above-mentioned method of fixing the first vertical plate 100 and the cylinder 300 by the fastening bolt 201 and the nut 202 is convenient for installation and disassembly, thereby improving the installation and disassembly efficiency of the first vertical plate 100 and the cylinder 300.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features therein may be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An over-temperature protection device for a pneumatic valve positioner, characterized in that: include: A first vertical plate (100), wherein a mounting hole (101) is formed on the first vertical plate (100), wherein the mounting hole (101) is used for a fastener (200) to penetrate so as to fix the first vertical plate (100) on the cylinder (300), and a horizontal plate (102) is vertically connected to the top of the first vertical plate (100); a second vertical plate (400), the bottom of the second vertical plate (400) being vertically connected to an end of the transverse plate (102) away from the first vertical plate (100), the second vertical plate (400) being made of a heat-insulating material and a heat-insulating block (1021) of a preset thickness being arranged on the transverse plate (102) between the second vertical plate (400) and the fixing seat of the cylinder (300); A bearing plate (500), one end of which is horizontally arranged on a side wall of the second vertical plate (400) away from the first vertical plate (100), and is used to bear a pneumatic valve positioner (600).

2. The over-temperature protection device for a pneumatic valve positioner according to claim 1, characterized in that: A plurality of baffles (501) are arranged on the bearing plate (500), and the plurality of baffles (501) are vertically arranged on the upper surface of the bearing plate (500) and enclosed together with the second vertical plate (400) to form an accommodating space (700) capable of accommodating the pneumatic valve positioner (600); A plurality of guide through holes (5011) are provided on each of the baffles (501), a heat conducting rod (800) is provided through each of the guide through holes (5011), and a heat conducting plate (801) capable of abutting against the shell of the pneumatic valve positioner (600) is provided at one end of the heat conducting rod (800) located in the accommodating space (700).

3. The over-temperature protection device for a pneumatic valve positioner according to claim 2, characterized in that: The height of each baffle (501) is 1 / 3 to 1 / 2 of the height of the pneumatic valve positioner (600).

4. The over-temperature protection device for a pneumatic valve positioner according to claim 2, characterized in that: The carrier plate (500) is provided with a plurality of heat dissipation through holes (502); The carrier plate (500) is made of a heat-conducting material and has heat dissipation fins (503) arranged on its lower surface.

5. The over-temperature protection device for a pneumatic valve positioner according to claim 4, characterized in that: A cooling fan (401) is provided on a side wall of the second vertical plate (400) away from the first vertical plate (100).

6. The over-temperature protection device for a pneumatic valve positioner according to claim 1, characterized in that: The heat insulation blocks (1021) are made of phenolic resin; The preset thickness is 48mm-53mm.

7. The over-temperature protection device for a pneumatic valve positioner according to any one of claims 1 to 6, characterized in that: There are a plurality of the mounting holes (101), and all of the plurality of mounting holes (101) are first threaded through holes, and the cylinder (300) is provided with a plurality of second threaded through holes (301) corresponding one-to-one to the plurality of mounting holes (101); The fastener (200) comprises a fastening bolt (201) and a nut (202); The screw end of the fastening bolt (201) passes through the mounting hole (101) and the second threaded through hole (301) in sequence, and the nut (202) is screwed onto the screw of the fastening bolt (201) close to the cylinder (300).

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