Explosion-proof pressure controller

Abstract

The utility model belongs to the technical field of pressure control equipment, and particularly relates to an anti-explosion pressure controller which comprises an anti-explosion controller body, an air inlet pipe is fixedly communicated with the surface of the anti-explosion controller body, a butt joint pipe is in threaded connection with the surface of the air inlet pipe, an anti-falling mechanism is arranged on the surface of the butt joint pipe, and the anti-falling mechanism is in threaded connection with the butt joint pipe. The anti-falling mechanism comprises supporting plates, the supporting plates are fixedly installed on the surface of the butt joint pipe, the number of the supporting plates is two, the inner walls of the supporting plates are rotationally connected with connecting rods, and a fixing plate is fixedly installed on the surface of the air inlet pipe. By arranging the anti-falling mechanism, the butt-joint pipe and the air inlet pipe can be prevented from being separated due to the thread slipping phenomenon, the butt-joint pipe is supported by entering the inner cavity of the sliding groove through the connecting rod and supporting the connecting rod and the supporting plate through the clamping block, and therefore the butt-joint pipe and the air inlet pipe are prevented from being separated, and the stability after butt joint of the butt-joint pipe and the air inlet pipe is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure control equipment, in particular to an explosion-proof pressure controller. Background Art

[0002] Explosion-proof pressure controllers (also called switches, relays, although there is no PLC and power supply inside the instrument, they are currently collectively referred to as explosion-proof pressure controllers in the industry) achieve explosion-proof effects by enclosing the wiring contacts in a solid space through a sturdy sealed shell. They are widely used in metallurgy, electric power, chemical industry, petroleum, steel, machinery, refrigeration equipment, freezing equipment and other industries for pressure monitoring, alarm, and interlocking protection on gas, steam, water, oil and other liquid pressure equipment.

[0003] During the use of explosion-proof pressure controller, threads are usually used to connect the inlet pipe and the butt pipe. The threaded connection can increase the contact area between the two and achieve a better sealing effect. However, after long-term use, the threads may slip downward, causing looseness between the butt pipe and the intake pipe, resulting in gas overflow and reducing the stability between the butt pipe and the intake pipe. Utility Model Content

[0004] In order to make up for the shortcomings of the prior art, the utility model proposes an explosion-proof pressure controller, which may cause thread slippage during long-term use, resulting in looseness between the butt joint pipe and the intake pipe, causing gas overflow and reducing the stability between the butt joint pipe and the intake pipe.

[0005] The utility model solves the technical problem by adopting the following technical solution: an explosion-proof pressure controller, comprising an explosion-proof controller body, the surface of the explosion-proof controller body is fixedly connected with an air intake pipe, the surface of the air intake pipe is threadedly connected with a butt pipe, and the surface of the butt pipe is provided with an anti-dropping mechanism;

[0006] The anti-falling mechanism includes a support plate, which is fixedly installed on the surface of the docking pipe. There are two support plates, and the inner wall of the support plate is rotatably connected with a connecting rod. A fixing plate is fixedly installed on the surface of the intake pipe, and a sliding groove is provided on the surface of the fixing plate. The surface of the connecting rod is slidably connected to the inner cavity of the sliding groove. A clamping block is fixedly installed on the top of the connecting rod, and the bottom of the clamping block is in contact with the top of the fixing plate.

[0007] Preferably, a movable groove is provided on one side of the fixing plate, the inner cavity of the movable groove is slidably connected with a positioning rod, a positioning hole is provided on the surface of the connecting rod, and the surface of the positioning rod is slidably connected to the inner cavity of the positioning hole.

[0008] Preferably, a fixing groove is provided on one side of the fixing plate, a spring is fixedly installed on the inner wall of the fixing groove, an extension plate is fixedly installed on the surface of the positioning rod, and one end of the spring is fixedly connected to the surface of the extension plate.

[0009] Preferably, a guide groove is provided on the inner wall of the movable groove, a guide block is fixedly mounted on the surface of the positioning rod, and an inner cavity of the guide groove is slidably connected to the surface of the guide block.

[0010] Preferably, a fixing rod is fixedly mounted on the inner wall of the fixing groove, and the inner cavity of the spring is sleeved on the surface of the fixing rod.

[0011] Preferably, an elastic clip is fixedly mounted on the surface of the butt joint pipe, and the surface of the connecting rod is in contact with the inner side of the elastic clip.

[0012] Preferably, a limiting groove is provided on the inner wall of the guide groove, a limiting block is fixedly mounted on the surface of the guide block, and the inner cavity of the limiting groove is slidably connected to the surface of the limiting block.

[0013] The utility model is beneficial in that:

[0014] The utility model discloses to prevent the butt joint tube and the air intake pipe from slipping and detaching by arranging the anti-falling mechanism, enters the inner cavity of the sliding groove through the connecting rod, supports the connecting rod and the support plate through the card block, thereby preventing the butt joint tube and the air intake pipe from detaching and increasing the stability of the two after docking. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art 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 paying creative work.

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the anti-falling mechanism of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the connection groove and the connection block of the utility model;

[0019] Figure 4 It is a structural cross-sectional view of the fixing groove, spring and extension plate of the utility model.

[0020] In the figure: 1. explosion-proof controller body; 2. air inlet pipe; 3. docking pipe; 4. anti-falling mechanism; 401. support plate; 402. connecting rod; 403. fixing plate; 404. sliding groove; 405. block; 406. moving groove; 407. positioning rod; 408. positioning hole; 5. connecting groove; 6. connecting block; 7. fixing groove; 8. spring; 9. extension plate; 10. guide groove; 11. guide block; 12. fixing rod; 13. limit groove; 14. limit block; 15. elastic clip. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The following is combined with Figure 1-4 To further explain this application in detail,

[0023] The present application embodiment discloses an explosion-proof pressure controller. Figure 1 ,and Figure 2 An explosion-proof pressure controller comprises an explosion-proof controller body 1, an air inlet pipe 2 is fixedly connected to the surface of the explosion-proof controller body 1, a butt joint pipe 3 is threadedly connected to the surface of the air inlet pipe 2, and an anti-drop mechanism 4 is arranged on the surface of the butt joint pipe 3;

[0024] The anti-falling mechanism 4 includes a support plate 401, which is fixedly installed on the surface of the docking tube 3. There are two support plates 401. A connecting rod 402 is rotatably connected to the inner wall of the support plate 401. A fixing plate 403 is fixedly installed on the surface of the intake pipe 2. A sliding groove 404 is provided on the surface of the fixing plate 403. The surface of the connecting rod 402 is slidably connected to the inner cavity of the sliding groove 404. A clamping block 405 is fixedly installed on the top of the connecting rod 402, and the bottom of the clamping block 405 is in contact with the top of the fixing plate 403.

[0025] Reference Figure 3 The surface of the air inlet pipe 2 is provided with a connecting groove 5, and the surface of the fixing plate 403 is provided with a connecting block 6. The surface of the connecting block 6 is slidably connected to the inner cavity of the connecting groove 5. Through the sliding connection between the connecting groove 5 and the connecting block 6, the position of the fixing plate 403 can be adjusted to deflect the fixing plate 403, thereby avoiding the staggered phenomenon between the supporting plate 401 and the fixing plate 403;

[0026] Reference Figure 4A fixing groove 7 is provided on one side of the fixing plate 403, a spring 8 is fixedly installed on the inner wall of the fixing groove 7, an extension plate 9 is fixedly installed on the surface of the positioning rod 407, one end of the spring 8 is fixedly connected to the surface of the extension plate 9, by arranging the spring 8 and the extension plate 9, when the positioning rod 407 cancels the contact with the inner cavity of the positioning hole 408, the positioning rod 407 is pulled outward, and at the same time, the spring 8 can be driven to extend in the inner cavity of the fixing groove 7 through the extension plate 9, and when the positioning rod 407 passes through the positioning hole 408 again, the reaction force of the spring 8 drives the positioning rod 407 to slide in the inner cavity of the movable groove 406, so as to realize the automatic resetting of the positioning rod 407 and realize the re-angle limit of the docking rod;

[0027] Reference Figure 4 The inner wall of the moving groove 406 is provided with a guide groove 10, and a guide block 11 is fixedly installed on the surface of the positioning rod 407. The inner cavity of the guide groove 10 is slidably connected with the surface of the guide block 11. By setting the sliding connection between the guide groove 10 and the guide block 11, the movement of the positioning rod 407 can be guided, so that the positioning rod 407 can move horizontally, and the movement of the positioning rod 407 can be more stable;

[0028] Reference Figure 4 A fixing rod 12 is fixedly installed on the inner wall of the fixing groove 7, and the inner cavity of the spring 8 is sleeved on the surface of the fixing rod 12. By setting the fixing rod 12 and the spring 8 being sleeved on the surface of the fixing rod 12, when the spring 8 retracts, the lateral deformation distance of the spring 8 can be limited, and the inner cavity of the spring 8 is supported, thereby avoiding excessive deformation of the spring 8 and increasing the service life of the spring 8;

[0029] Reference Figure 2 The surface of the butt-joint pipe 3 is fixedly mounted with an elastic clip 15, and the surface of the connecting rod 402 contacts the inner side of the elastic clip 15. By providing the elastic clip 15, when the connecting rod 402 is not working, the elastic clip 15 contacts the surface of the connecting rod 402, so as to limit the rotation angle of the connecting rod 402, thereby reducing the shaking of the connecting rod 402 when working, and reducing the influence of the activity of the connecting rod 402 on the connection between the butt-joint pipe 3 and the intake pipe 2;

[0030] Reference Figure 4 A limiting groove 13 is provided on the inner wall of the guide groove 10, and a limiting block 14 is fixedly installed on the surface of the guide block 11. The inner cavity of the limiting groove 13 is slidably connected to the surface of the limiting block 14. The sliding connection between the limiting groove 13 and the limiting block 14 can limit the stretching length of the spring 8 to prevent the spring 8 from being overstretched and losing its elasticity. At the same time, the outward movement distance of the positioning rod 407 can be limited to prevent the positioning rod 407 from being separated from the fixing plate 403.

[0031] Working principle: explosion-proof controller body: including pressure sensor, control unit and solenoid valve. The pressure inside the controller is measured by the pressure sensor, and the signal is sent to the control unit. The pressure is compared and judged according to the set threshold value. The opening and closing of the valve is controlled by the solenoid valve to adjust the pressure inside the pipeline or container, so as to control the pressure inside the pipeline and the container, and achieve the purpose of explosion-proof pressure relief. When the butt-joint pipe 3 is threadedly connected with the intake pipe 2, the connecting rod 402 is supported by the support plate 401, and the connecting rod 402 is rotated. 02, so that the surface of the connecting rod 402 enters the inner cavity of the sliding groove 404. When the connecting rod 402 rotates at an angle of 90°, the block 405 can contact the top of the fixed plate 403. The positioning rod 407 slides in the movable groove 406, so that the positioning rod 407 enters the inner cavity of the positioning hole 408, thereby limiting the rotation angle of the connecting rod 402 and realizing the docking of the fixed plate 403 and the support plate 401. This can enhance the stability of the docking tube 3 and the intake pipe 2 after docking, and prevent the docking tube 3 and the intake pipe 2 from falling off.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. An explosion-proof pressure controller, characterized in that: It comprises an explosion-proof controller body (1), the surface of the explosion-proof controller body (1) being fixedly connected to an air intake pipe (2), the surface of the air intake pipe (2) being threadedly connected to a butt joint pipe (3), and the surface of the butt joint pipe (3) being provided with an anti-dropping mechanism (4); The anti-falling mechanism (4) comprises a support plate (401), the support plate (401) being fixedly mounted on the surface of the butt-jointed pipe (3), the number of the support plates (401) being two, the inner wall of the support plate (401) being rotatably connected to a connecting rod (402), a fixing plate (403) being fixedly mounted on the surface of the intake pipe (2), a sliding groove (404) being provided on the surface of the fixing plate (403), the surface of the connecting rod (402) being rotatably connected to the inner cavity of the sliding groove (404), Sliding connection, a block (405) is fixedly installed on the top of the connecting rod (402), the bottom of the block (405) is in contact with the top of the fixed plate (403), a movable groove (406) is opened on one side of the fixed plate (403), the inner cavity of the movable groove (406) is slidably connected with a positioning rod (407), a positioning hole (408) is opened on the surface of the connecting rod (402), and the surface of the positioning rod (407) is slidably connected to the inner cavity of the positioning hole (408).

2. An explosion-proof pressure controller according to claim 1, characterized in that: A connection groove (5) is provided on the surface of the air inlet pipe (2), a connection block (6) is provided on the surface of the fixing plate (403), and the surface of the connection block (6) is slidably connected to the inner cavity of the connection groove (5).

3. An explosion-proof pressure controller according to claim 1, characterized in that: A fixing groove (7) is provided on one side of the fixing plate (403), a spring (8) is fixedly mounted on the inner wall of the fixing groove (7), an extension plate (9) is fixedly mounted on the surface of the positioning rod (407), and one end of the spring (8) is fixedly connected to the surface of the extension plate (9).

4. The explosion-proof pressure controller according to claim 1, characterized in that: The inner wall of the movable groove (406) is provided with a guide groove (10), the surface of the positioning rod (407) is fixedly mounted with a guide block (11), and the inner cavity of the guide groove (10) is slidably connected to the surface of the guide block (11).

5. The explosion-proof pressure controller according to claim 3, characterized in that: A fixing rod (12) is fixedly mounted on the inner wall of the fixing groove (7), and the inner cavity of the spring (8) is sleeved on the surface of the fixing rod (12).

6. The explosion-proof pressure controller according to claim 1, characterized in that: An elastic clip (15) is fixedly mounted on the surface of the butt joint tube (3), and a surface of the connecting rod (402) is in contact with the inner side of the elastic clip (15).

7. An explosion-proof pressure controller according to claim 4, characterized in that: The inner wall of the guide groove (10) is provided with a limit groove (13), the surface of the guide block (11) is fixedly mounted with a limit block (14), and the inner cavity of the limit groove (13) is slidably connected to the surface of the limit block (14).

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