Mounting mechanism and valve positioner for secondary air door

Abstract

The utility model discloses a mounting mechanism and a valve positioner for a secondary air door, and relates to the technical field of positioners, the mounting mechanism comprises a mounting unit which comprises a support piece, a moving rod arranged on the inner side of the support piece, a pressing block arranged in the support piece, a reset piece arranged at the end part of the pressing block, and a push block arranged on one side of the moving rod, the first spring is arranged at the end part of the moving rod; the clamping unit comprises a hinge seat, a clamping rod arranged on the inner side of the hinge seat and an extrusion rod arranged on one side of the hinge seat; the hinge seat is fixed at the end part of the push block; the ends of the clamping rods make contact with the side wall of the supporting piece. The positioning device has the beneficial effects that the positioning device main body can be quickly mounted and dismounted through the mutual matching of the mounting unit and the clamping unit, so that a worker can conveniently repair and maintain the positioning device main body.

Description

Technical Field

[0001] The utility model relates to the technical field of positioners, in particular to a mounting mechanism and a valve positioner for a secondary air door. Background Art

[0002] ABB positioner is a microprocessor-based valve positioner with features such as automatic debugging, self-diagnostic information, modular design, ultra-low instrument gas consumption and extremely high seismic resistance. It is widely used in the industrial field. The position of the damper baffle on the secondary damper of the factory unit boiler is mostly adjusted by a cylinder to push the damper to flip; and the cylinder is driven by the core component positioner.

[0003] The existing integrated positioner is exposed to the outdoors for a long time, and the poor sealing makes it easy to be eroded by rainwater. Water can get into the inside, causing short circuit and damage to the circuit board of the positioner. In addition, the pneumatic actuators of the secondary damper are numerous, widely distributed, and installed at a high position. Therefore, in order to eliminate faults, scaffolding needs to be set up for each inspection and maintenance, which increases the maintenance cost and the safety hazard of the maintenance personnel. Utility Model Content

[0004] In view of the above-mentioned prior art problems, the present utility model is proposed.

[0005] The utility model aims to provide a mounting mechanism, which aims to solve the problem that the existing integrated positioner is easily damaged during use and is inconvenient to repair.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: an installation mechanism, comprising, an installation unit, including a support, a moving rod arranged inside the support, a pressing block arranged inside the support, a reset member arranged at the end of the pressing block, a push block arranged at one side of the moving rod, and a first spring arranged at the end of the moving rod;

[0007] The clamping unit comprises an articulated seat, a clamping rod arranged inside the articulated seat, and an extrusion rod arranged on one side of the articulated seat;

[0008] The hinge seat is located at the end of the push block and is fixed; the end of the clamping rod is in contact with the side wall of the support member.

[0009] As a preferred solution of the installation mechanism of the utility model, wherein: the support member includes a base, a column arranged on the surface of the base, a first through hole arranged on the side wall of the column, a second through hole arranged at the end of the base, and a third through hole arranged on the surface of the base;

[0010] The interior of the support member is a hollow structure;

[0011] The base is connected to the column;

[0012] The push block passes through the third through hole and extends to the inner side of the column.

[0013] As a preferred solution of the installation mechanism of the utility model, wherein: the moving rod includes a sliding groove arranged inside the moving rod, a rotating groove arranged on one side of the sliding groove, and a notch arranged at the end of the moving rod;

[0014] The push block is matched with the sliding groove; the push block passes through the second through hole and extends to the inner side of the support member.

[0015] As a preferred solution of the installation mechanism of the utility model, wherein: the first through hole includes a first rotating shaft arranged inside the first through hole;

[0016] The pressing block includes a rotating shaft sleeve arranged on the side wall, a clamping part arranged on one end of the pressing block, and a moving part arranged on the other end of the pressing block;

[0017] The pressing block is disposed inside the first through hole;

[0018] The rotating shaft sleeve rotates along the axial direction of the first rotating shaft;

[0019] An end portion of the moving portion contacts an inner wall of the first through hole.

[0020] As a preferred solution of the installation mechanism of the utility model, wherein: the reset member includes a guide rod, a second spring arranged outside the guide rod, a limit plate arranged at one end of the guide rod, and an extrusion block arranged at the other end of the guide rod;

[0021] The guide rod passes through the notch and extends to the inner side of the rotation groove;

[0022] An end portion of the pressing block contacts an end portion of the moving portion.

[0023] As a preferred solution of the installation mechanism of the utility model, wherein: the first spring is arranged between the notch and the column;

[0024] One end of the first spring is fixed to the inner wall of the notch; the other end of the first spring is fixed to the inner wall of the column.

[0025] As a preferred solution of the installation mechanism of the utility model, wherein: the hinge seat includes a second rotating shaft arranged inside the hinge seat;

[0026] The second rotating shaft includes a limit block arranged on an outer wall thereof;

[0027] The clamping rod comprises an axial hole arranged at an end thereof, and an extrusion plate arranged at the end of the clamping rod;

[0028] The shaft hole includes a limiting groove arranged on its inner wall;

[0029] The second rotating shaft matches the shaft hole;

[0030] The limiting block is adapted to the limiting groove;

[0031] The included angle of the limiting groove is 90°.

[0032] As a preferred solution of the installation mechanism of the utility model, wherein: the push block includes a circular hole arranged at its end;

[0033] The extrusion rod comprises a cam and a knob arranged at the end of the extrusion rod;

[0034] The end of the cam is in contact with the extrusion plate;

[0035] The base includes a positioning groove arranged on a side wall thereof;

[0036] The end of the clamping rod contacts the positioning groove.

[0037] The beneficial effect of the installation mechanism of the utility model is that the installation unit and the clamping unit cooperate with each other, so that the installation and disassembly of the positioner body can be quickly completed, thereby facilitating the maintenance of the positioner body by the staff.

[0038] Another object of the utility model is to provide a valve positioner for a secondary air valve, which aims to solve the problem that the existing integrated positioner is easily damaged by rainwater when installed outdoors for a long time.

[0039] In order to solve the above technical problems, the utility model also provides the following technical solutions: a valve positioner for a secondary air door, comprising a mounting mechanism; and a positioner assembly, comprising a positioner body and a connecting frame arranged on one side of the positioner body;

[0040] Local control cabinet;

[0041] Filter pressure reducing valve;

[0042] Position sensor;

[0043] Air filter;

[0044] The positioner assembly is in communication with the filter pressure reducing valve;

[0045] The air filter is installed inside the local control cabinet.

[0046] As a preferred solution of the valve positioner for the secondary air door of the utility model, wherein: the local control cabinet includes a mounting frame arranged inside the local control cabinet;

[0047] The support member and the mounting frame are fixed by welding;

[0048] The pressing block matches with the connecting frame.

[0049] The beneficial effects of the valve positioner for the secondary air door of the utility model are as follows: the device adopts a split positioner; the positioner body is installed inside the local control cabinet, thereby effectively avoiding the positioner body from being exposed to the outdoors for a long time, and the local control cabinet provided provides certain protection for the positioner body; the filter pressure reducing valve provided has a high filtering accuracy, and can filter impurities, water and oil in the air source, effectively preventing the air path of the positioner from being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0051] Figure 1 It is a structural schematic diagram of the utility model.

[0052] Figure 2 It is a partial cross-sectional view of the local control cabinet in the utility model.

[0053] Figure 3 It is a schematic diagram of the connection structure between the positioner assembly and the mounting unit in the utility model.

[0054] Figure 4 It is a schematic diagram of the connection structure between the installation unit and the clamping unit in the utility model.

[0055] Figure 5 It is a cross-sectional view of the support member in the utility model.

[0056] Figure 6 It is a schematic diagram of the exploded structure of the installation unit and the clamping unit in the utility model.

[0057] Figure 7 For the utility model Figure 6 A is a partial enlarged view of the

[0058] Figure 8 It is the installation schematic diagram in the utility model. DETAILED DESCRIPTION

[0059] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0060] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0061] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0062] Example 1

[0063] Reference Figure 1 to Figure 6 , is the first embodiment of the utility model, which provides an installation mechanism, including, an installation unit 100, including a support member 101, a moving rod 102 arranged on the inner side of the support member 101, a pressing block 103 arranged inside the support member 101, a reset member 104 arranged at the end of the pressing block 103, a pushing block 105 arranged on one side of the moving rod 102, and a first spring 106 arranged at the end of the moving rod 102.

[0064] Preferably, the support member 101 is fixedly connected to the mounting frame 400a; the support member 101 is arranged so as to be located between the components and provide a certain travel space; the pressing block 103 is arranged to rotate inside the support member 101, and the movement of the moving rod 102 can drive the pressing block 103 to rotate, so that the pressing block 103 can press the connecting frame 302; the first spring 106 can reset the moving rod 102, thereby better promoting the movement of the moving rod 102.

[0065] Furthermore, the clamping unit 200 includes an articulated seat 201, a clamping rod 202 arranged on the inner side of the articulated seat 201, and an extrusion rod 203 arranged on one side of the articulated seat 201; the articulated seat 201 is fixed at the end of the push block 105; the end of the clamping rod 202 contacts the side wall of the support member 101.

[0066] Preferably, one end of the clamping rod 202 can rotate around the hinge seat 201, and as the clamping rod 202 rotates, the ends of the clamping rod 202 can be close to the two sides of the support member 101, so that the clamping rod 202 can be clamped on both sides of the support member 101; the set extrusion rod 203 can squeeze the clamping rod 202, and the extrusion rod 203 squeezes the clamping rod 202, so that the ends of the clamping rod 202 can be tightly attached to the two sides of the support member 101.

[0067] When in use, the connecting frame 302 is sleeved on the outside of the support member 101, and the top of the support member 101 contacts the inner wall of the connecting frame 302; at this time, the positioner body 301 can be installed and set inside the local control cabinet 400 by relying on the connecting frame 302; then, by pushing the extrusion rod 203, the extrusion rod 203 moves to drive the push block 105 to move, the push block 105 moves to drive the moving rod 102 to move, and the moving rod 102 moves to drive the pressing block 103 to flip, and as the moving rod 102 rotates, the first spring 106 When in a compressed state, the pressing block 103 can rotate its end to press tightly against the inner side of the connecting frame 302, thereby fixing the position of the connecting frame 302 and the support member 101. Then, by rotating the extrusion rod 203, the extrusion rod 203 pushes one end of the clamping rod 202 to open, so that the other end of the clamping rod 202 is brought together, so that its end can be tightly attached to the side wall of the support member 101; thereby, the position of the push block 105 can be fixed, and then the position between the locator body 301 and the support member 101 can be fixed.

[0068] In summary, by cooperating with each other through the installation unit 100 and the clamping unit 200, the position between the locator body 301 and the support member 101 can be better fixed, which is more convenient for the staff to operate during the maintenance of the locator.

[0069] Example 2

[0070] Reference Figure 3 to Figure 7 , which is the second embodiment of the utility model, includes: the support member 101 includes a base 101a, a column 101b arranged on the surface of the base 101a, a first through hole 101c arranged on the side wall of the column 101b, a second through hole 101d arranged at the end of the base 101a, and a third through hole 101e arranged on the surface of the base 101a; the interior of the support member 101 is a hollow structure; the base 101a is connected to the column 101b; the push block 105 passes through the third through hole 101e and extends to the inner side of the column 101b.

[0071] Preferably, the base 101a is a rectangular structure, the column 101b is a cylindrical structure, and the base 101a is connected to the column 101b; there are two groups of first through holes 101c, and the first through holes 101c are symmetrically arranged on both sides of the column 101b; the push block 105 matches the second through hole 101d, and the push block 105 can slide along the inner wall of the second through hole 101d.

[0072] Furthermore, the moving rod 102 includes a sliding groove 102a arranged therein, a rotating groove 102b arranged on one side of the sliding groove 102a, and a notch 102c arranged at the end of the moving rod 102; the push block 105 is adapted to the sliding groove 102a; the push block 105 passes through the second through hole 101d and extends to the inner side of the support member 101.

[0073] Preferably, the sliding groove 102a is arranged near the bottom of the moving rod 102, and the position of the rotating groove 102b corresponds to the position of the first through hole 101c; the notch 102c is opened at the top of the moving rod 102; the moving rod 102 cooperates with the column 101b, the moving rod 102 is located inside the column 101b and moves, and the moving rod 102 passes through the third through hole 101e and extends to the outside thereof; the push block 105 cooperates with the sliding groove 102a, and the inclined surface of the push block 105 can squeeze the inner wall of the sliding groove 102a during the movement, and the push block 105 moves in the horizontal direction, which can drive the moving rod 102 to move in the vertical direction.

[0074] Furthermore, the first through hole 101c includes a first rotating shaft 101c-1 arranged therein; the pressing block 103 includes a rotating shaft sleeve 103a arranged on the side wall, a clamping portion 103b arranged at one end of the pressing block 103, and a movable portion 103c arranged at the other end of the pressing block 103; the pressing block 103 is arranged inside the first through hole 101c; the rotating shaft sleeve 103a rotates along the axial direction of the first rotating shaft 101c-1; the end of the movable portion 103c contacts the inner wall of the rotating groove 102b.

[0075] Preferably, there are two groups of pressing blocks 103, and the two groups of pressing blocks 103 are located inside the two groups of first through holes 101c; the rotating shaft sleeve 103a rotates along the axial direction of the first rotating shaft 101c-1; the movement of the moving rod 102 can drive the end of the moving part 103c to tilt up, so that the pressing block 103 flips over, so that the end of the clamping part 103b can be pressed against the inner side of the connecting frame 302, so that the connecting frame 302 can be pressed above the support member 101.

[0076] Furthermore, the reset member 104 includes a guide rod 104a, a second spring 104b arranged on the outside of the guide rod 104a, a limit plate 104c arranged at one end of the guide rod 104a, and an extrusion block 104d arranged at the other end of the guide rod 104a; the guide rod 104a passes through the notch 102c and extends to the inner side of the rotating groove 102b; the end of the extrusion block 104d contacts the end of the moving part 103c.

[0077] Preferably, there are two groups of reset members 104, and the positions of the two groups of reset members 104 correspond to the two groups of pressing blocks 103 respectively; the guide rod 104a guides the second spring 104b, and can ensure that the second spring 104b does not exceed the range of its elastic deformation during the compression process; the end of the extrusion block 104d contacts the end of the moving part 103c; the second spring 104b resets and pushes the extrusion block 104d to move, and the extrusion block 104d can squeeze the moving part 103c, so that the pressing block 103 can rotate; thereby resetting the pressing block 103; the limit plate 104c is located at the top of the guide rod 104a, and the limit plate 104c can limit the guide rod 104a to ensure that the guide rod 104a moves in the vertical direction.

[0078] Furthermore, the first spring 106 is disposed between the notch 102c and the column 101b; one end of the first spring 106 is fixed to the inner wall of the notch 102c; and the other end of the first spring 106 is fixed to the inner wall of the column 101b.

[0079] Preferably, the first spring 106 can drive the moving rod 102 to move, so that the moving rod 102 can be in a reset state; the top of the first spring 106 is in contact with the inner wall of the column 101b; the moving rod 102 moves upward to compress the first spring 106, so that the first spring 106 can be compressed inside the notch 102c.

[0080] Furthermore, the hinge seat 201 includes a second rotating shaft 201a arranged inside it; the second rotating shaft 201a includes a limit block 201a-1 arranged on its outer wall; the clamping rod 202 includes an axial hole 202a arranged at its end, and an extrusion plate 202b arranged at the end of the clamping rod 202; the axial hole 202a includes a limit groove 202a-1 arranged on its inner wall; the second rotating shaft 201a is matched with the axial hole 202a; the limit block 201a-1 is matched with the limit groove 202a-1; the angle of the limit groove 202a-1 is 90°.

[0081] Preferably, the hinge seat 201 is fixedly connected with the push block 105, the second rotating shaft 201a is matched with the shaft hole 202a, and the clamping rod 202 rotates along the axial direction of the second rotating shaft 201a; the clamping rod 202 rotates so that the limiting groove 202a-1 is located outside the limiting block 201a-1 and rotates. The limiting groove 202a-1 is a quarter arc structure, so that the movement trajectory of the clamping rod 202 is ninety degrees. The limiting block 201a-1 can limit the operation of the clamping rod 202. When the limiting groove 202a-1 cooperates with the limiting block 201a-1, the end of the clamping rod 202 contacts the side wall of the support member 101.

[0082] Furthermore, the push block 105 includes a circular hole 105a arranged at its end; the extrusion rod 203 includes a cam 203a and a knob 203b arranged at the end of the extrusion rod 203; the end of the cam 203a contacts the extrusion plate 202b; the base 101a includes a positioning groove 101a-1 arranged on its side wall; the end of the clamping rod 202 contacts the positioning groove 101a-1.

[0083] Furthermore, the end of the extrusion rod 203 cooperates with the circular hole 105a, and the extrusion rod 203 rotates along the axial direction of the circular hole 105a. The end of the cam 203a can better fit with the extrusion plate 202b. As the extrusion rod 203 rotates, the cam 203a squeezes the extrusion plate 202b, and one end of the clamping rod 202 opens, and then the other end of the clamping rod 202 approaches and closes, so that the end of the clamping rod 202 is located on the inner side of the positioning groove 101a-1, so that the clamping rod 202 can be clamped on the side wall of the support member 101, so that the position between the clamping rod 202 and the support member 101 is fixed.

[0084] When in use, when the staff needs to fix the position of the locator body 301, they will sleeve the connecting frame 302 on the column 101b, so that the top of the column 101b can fit with the inner wall of the connecting frame 302; the connecting frame 302 is arranged outside the column 101b, and the locator body 301 can be fixed on one side of the mounting frame 400a, and then the extrusion rod 203 is pushed, and the movement of the extrusion rod 203 drives the push block 105 to move, so that the push block 105 slides along the inner wall of the second through hole 101d, and the end of the push block 105 cooperates with the inner wall of the sliding groove 102a; as one end of the push block 105 moves, The movement of the moving rod 102 drives the rotating groove 102b to push the moving part 103c to move. The pushing moving part 103c can make the pressing block 103 rotate along the axial direction of the first rotating shaft 101c-1. As the pressing block 103 rotates, the end of the clamping part 103b can contact the inner wall of the connecting frame 302, so that the clamping part 103b can press the connecting frame 302, so that the position between the connecting frame 302 and the support member 101 can be fixed; as the pushing block 105 moves, the clamping rod 202 is driven to move. As the pushing block 105 moves, the pushing rod 202 is driven to move. 5 is inserted into the inner side of the sliding groove 102a, one end of the clamping rod 202 contacts the side wall of the support member 101, and the other end of the clamping rod 202 rotates along the axis direction of the second rotating shaft 201a. When the position of the clamping rod 202 needs to be fixed, the knob 203b is turned, and the rotation of the knob 203b drives the cam 203a to rotate, and the end of the cam 203a squeezes the extrusion plate 202b, so that the shaft hole 202a rotates in the opposite direction along the axis of the second rotating shaft 201a, and one end of the two sets of clamping rods 202 opens and the other end is relatively close, so that the clamping rod 202 is clamped on the outside of the support member 101; the clamping rod 202 rotates During the movement, the limit groove 202a-1 cooperates with the limit block 201a-1 to fix the rotating position of the clamping rod 202; as the extrusion rod 203 squeezes the extrusion plate 202b, the limit block 201a-1 limits the position of the clamping rod 202, and the end of the extrusion rod 203 continuously squeezes the extrusion plate 202b, so that one end of the clamping rod 202 is engaged with the inner side of the positioning groove 101a-1, thereby fixing the position between the support member 101 and the clamping rod 202, and then fixing the position of the moving rod 102, thereby ensuring that the pressing block 103 can press the inner wall of the connecting frame 302.

[0085] In summary, by cooperating with each other between the installed installation unit and the clamping unit, the installation and disassembly of the positioner body can be quickly completed, thereby facilitating the staff to repair and maintain the positioner body.

[0086] Example 3

[0087] Reference Figure 1 to Figure 3 and Figure 8, which is the third embodiment of the utility model, this embodiment further provides a valve positioner for a secondary air door, including a positioner assembly 300, including a positioner body 301, and a connecting frame 302 arranged on one side of the positioner body 301; an on-site control cabinet 400; a filter pressure reducing valve 500; a position sensor 600; an air filter 700; the positioner assembly 300 is connected to the filter pressure reducing valve 500; and the air filter 700 is installed on the inner side of the on-site control cabinet 400.

[0088] Preferably, the filter pressure reducing valve 500 is an existing device, and the filter pressure reducing valve 500 is connected to the positioner body 301, which can better ensure that the gas entering the positioner body 301 remains clean; the water and oil in the equipment pipeline can be effectively treated; the impurities, water and oil in the gas source will not enter the positioner, effectively preventing the gas path of the positioner from being blocked, and ensuring that the positioner can be used for a long time; the air filter 700 is set up using a two-in-one multifunctional drying filter, which minimizes the erosion of the equipment by impurities, oil and water in the gas source, meets the requirements of precision control equipment, and improves the service life of the equipment; the local control cabinet has a positioner and an air handling unit; the field adjustable instruments and components are concentrated, which facilitates daily maintenance and repair and plays a good protective role against dust and water; the field actuator is installed with a position sensor 600, which does not require daily maintenance.

[0089] Furthermore, the local control cabinet 400 includes a mounting frame 400 a disposed inside the cabinet; the support member 101 and the mounting frame 400 a are welded and fixed; and the pressing block 103 cooperates with the connecting frame 302 .

[0090] Preferably, the mounting frame 400a is welded and fixed to the local control cabinet 400; the mounting frame 400a is located and fixed between the support members 101; the pressing block 103 cooperates with the connecting frame 302, and the pressing block 103 can be rotated to press the connecting frame 302, so that the connecting frame 302 is pressed above the support member 101, thereby fixing the position between the support member 101 and the clamping rod 202, thereby ensuring that the locator body 301 is installed inside the local control cabinet 400.

[0091] When in use, the locator body 301 is connected to the connecting frame 302, and the position of the connecting frame 302 is fixed by the installation unit 100 and the clamping unit 200, so that the locator body 301 can be fixed inside the local control cabinet 400. The setting of the local control cabinet 400 can better facilitate the staff to disassemble and repair the locator body 301, making it more convenient for the staff to repair the locator body 301.

[0092] In summary, the device adopts a split positioner; the positioner body is installed inside the local control cabinet, which can effectively avoid the positioner body being exposed to the outdoors for a long time. The local control cabinet provided can provide certain protection for the positioner body; the filter pressure reducing valve provided has high filtering accuracy, which can filter impurities, water and oil in the gas source, and effectively prevent the gas path of the positioner from being blocked.

[0093] It is important to note that the above embodiments are only used to illustrate the technical solution of the utility model and are not intended to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A mounting mechanism, characterized in that: include, The mounting unit (100) comprises a support member (101), a moving rod (102) arranged inside the support member (101), a pressing block (103) arranged inside the support member (101), a reset member (104) arranged at the end of the pressing block (103), a pushing block (105) arranged at one side of the moving rod (102), and a first spring (106) arranged at the end of the moving rod (102); The clamping unit (200) comprises an articulated seat (201), a clamping rod (202) arranged on the inner side of the articulated seat (201), and an extrusion rod (203) arranged on one side of the articulated seat (201); The hinge seat (201) is located and fixed at the end of the push block (105); the end of the clamping rod (202) is in contact with the side wall of the support member (101).

2. The mounting mechanism according to claim 1, characterized in that: The support member (101) comprises a base (101a), a column (101b) arranged on the surface of the base (101a), a first through hole (101c) arranged on the side wall of the column (101b), a second through hole (101d) arranged at the end of the base (101a), and a third through hole (101e) arranged on the surface of the base (101a); The interior of the support member (101) is a hollow structure; The base (101a) is communicated with the column (101b); The push block (105) passes through the third through hole (101e) and extends to the inner side of the column (101b).

3. The mounting mechanism according to claim 2, characterized in that: The moving rod (102) comprises a sliding groove (102a) arranged inside the moving rod, a rotating groove (102b) arranged on one side of the sliding groove (102a), and a notch (102c) arranged at the end of the moving rod (102); The push block (105) is adapted to the sliding groove (102a); the push block (105) passes through the second through hole (101d) and extends to the inner side of the support member (101).

4. The mounting mechanism according to claim 3, characterized in that: The first through hole (101c) comprises a first rotating shaft (101c-1) arranged inside the first through hole (101c); The pressing block (103) comprises a rotating shaft sleeve (103a) arranged on the side wall, a clamping portion (103b) arranged at one end of the pressing block (103), and a moving portion (103c) arranged at the other end of the pressing block (103); The pressing block (103) is arranged inside the first through hole (101c); The rotating shaft sleeve (103a) rotates along the axial direction of the first rotating shaft (101c-1); The end of the moving portion (103c) contacts the inner wall of the rotating groove (102b).

5. The mounting mechanism according to claim 4, characterized in that: The reset member (104) comprises a guide rod (104a), a second spring (104b) arranged outside the guide rod (104a), a limit plate (104c) arranged at one end of the guide rod (104a), and an extrusion block (104d) arranged at the other end of the guide rod (104a); The guide rod (104a) passes through the notch (102c) and extends to the inner side of the rotation groove (102b); An end of the extrusion block (104d) contacts an end of the moving portion (103c).

6. The mounting mechanism according to any one of claims 3 to 5, characterized in that: The first spring (106) is arranged between the notch (102c) and the column (101b); One end of the first spring (106) is fixed to the inner wall of the notch (102c); the other end of the first spring (106) is fixed to the inner wall of the column (101b).

7. The mounting mechanism according to claim 6, characterized in that: The hinge seat (201) comprises a second rotating shaft (201a) arranged inside the hinge seat; The second rotating shaft (201a) comprises a limiting block (201a-1) arranged on an outer wall thereof; The clamping rod (202) comprises an axial hole (202a) arranged at an end thereof, and an extrusion plate (202b) arranged at the end of the clamping rod (202); The shaft hole (202a) comprises a limiting groove (202a-1) arranged on its inner wall; The second rotating shaft (201a) matches the shaft hole (202a); The limiting block (201a-1) is adapted to the limiting groove (202a-1); The included angle of the limiting groove (202a-1) is 90°.

8. The mounting mechanism according to claim 7, characterized in that: The push block (105) comprises a circular hole (105a) arranged at its end; The extrusion rod (203) comprises a cam (203a) and a knob (203b) arranged at the end of the extrusion rod (203); The end of the cam (203a) is in contact with the extrusion plate (202b); The base (101a) comprises a positioning groove (101a-1) arranged on a side wall thereof; The end of the clamping rod (202) contacts the positioning groove (101a-1).

9. A valve positioner for a secondary air valve, characterized in that: comprising the mounting mechanism according to any one of claims 1 to 8; and A positioner assembly (300) comprises a positioner body (301) and a connecting frame (302) arranged on one side of the positioner body (301); Local control cabinet (400); Filter pressure reducing valve (500); Position sensor (600); Air filter (700); The positioner assembly (300) is in communication with the filter pressure reducing valve (500); The air filter (700) is installed inside the local control cabinet (400).

10. The valve positioner for the secondary air valve according to claim 9, characterized in that: The local control cabinet (400) comprises a mounting frame (400a) arranged inside the local control cabinet; The support member (101) and the mounting frame (400a) are fixed by welding; The pressing block (103) cooperates with the connecting frame (302).

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