Actuating mechanism of self-operated regulating valve

Abstract

The utility model discloses an actuating mechanism of a self-operated regulating valve, which relates to the field of actuating mechanisms of regulating valves, and comprises two cylinder covers, a diaphragm is arranged between the two cylinder covers, the opposite sides of the two cylinder covers cling to the surface of the diaphragm, and a positioning component is arranged between the diaphragm and the cylinder covers, so that the diaphragm is convenient to install, and the operating efficiency is improved. The surface of the cylinder cover is sleeved with an annular sealing ring with a C-shaped section, and the side surface of the cylinder cover is tightly connected with the inner wall of the sealing ring. According to the executing mechanism of the self-operated regulating valve, the sealing ring is arranged, then the sealing ring is connected to the connecting position of the two cylinder covers in a sleeved mode, stable connection of the two cylinder covers is guaranteed, the sealing ring is made of rubber and has certain elasticity, the inner diameter of the sealing ring is slightly smaller than the maximum diameter of the cylinder covers, and when the sealing ring is installed, the sealing ring is not prone to falling off. The sealing ring is in a stretched state, so that the sealing ring can be tightened on the surface of the cylinder cover, the sealing performance is ensured, and the mounting structure is simple and convenient to replace.

Description

Technical Field

[0001] The utility model relates to the field of an actuator of a regulating valve, in particular to an actuator of a self-operated regulating valve. Background Art

[0002] The self-operated pressure regulating valve does not require external energy and can work in places without electricity or gas. It is convenient and saves energy. It uses the energy of the regulated medium as the power source and introduces the actuator to control the valve core position. The feedback signal (pressure, pressure difference, temperature) at the valve output end is transmitted to the actuator through the signal pipe, changing the pressure difference and flow at both ends, so that the pressure before the valve (or after the valve) is stable. It has the advantages of sensitive action, good sealing, and small fluctuation of the pressure setting point.

[0003] In the self-operated regulating valve, the sealing performance of the top actuator is very important. To ensure the normal movement of the diaphragm, it is necessary to prevent the medium from being discharged from the inside of the actuator as much as possible. In the traditional regulating valve, the actuator is installed by using multiple sets of bolts and nuts to fix it. The larger the volume of the actuator structure, the more bolts and nuts are needed, which is more inconvenient during installation. Utility Model Content

[0004] The main purpose of the utility model is to provide an actuator for a self-operated regulating valve, which can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an actuator of a self-operated regulating valve, comprising two cylinder heads, a diaphragm is installed between the two cylinder heads, the opposite sides of the two cylinder heads are tightly attached to the surface of the diaphragm, a positioning assembly is arranged between the diaphragm and the cylinder heads to facilitate the installation of the diaphragm, an annular sealing ring with a C-shaped cross-section is sleeved on the surface of the cylinder head, the side surface of the cylinder head is tightly connected to the inner wall of the sealing ring, and a fixing assembly is fixedly installed on the surface of the cylinder head to fix the sealing ring to the cylinder head.

[0006] The positioning assembly includes a plurality of positioning columns, which are fixed on the surface of the diaphragm and are equidistantly arranged. Both ends of the positioning columns extend to both sides of the diaphragm. The surface of the cylinder cover is provided with a plurality of slots, and the positioning columns are clamped inside the slots.

[0007] The fixing assembly includes two C-shaped semicircular card covers, and mounting plates are fixedly installed at both ends of the semicircular card covers. The inner wall shape of the semicircular card covers is adapted to the shape of the sealing ring, and the two mounting plates are installed and fixed by a connecting assembly.

[0008] The connecting assembly comprises a circular hole, which is opened on the surface of the mounting plate. The circular holes of the two mounting plates correspond to each other. Bolts penetrate the inside of the circular hole, and nuts are sleeved on the surface of the bolts.

[0009] A ventilation pipe is installed on the surface of the diaphragm, and an air groove is opened on the surface of the diaphragm. The interior of the air groove is connected to the interior of the ventilation pipe. A fixing pipe is installed on the surface of one of the cylinder heads, and the ventilation pipe extends to the interior of the fixing pipe. A threaded plug is installed on the internal thread of the fixing pipe.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] 1. In the utility model, a sealing ring is provided and then sleeved on the connection position of the two cylinder heads to ensure a stable connection between the two cylinder heads. The sealing ring is made of rubber and has a certain elasticity. The inner diameter of the sealing ring is slightly smaller than the maximum diameter of the cylinder head. At this time, when the sealing ring is installed, it is in a stretched state, which can ensure that the sealing ring is tightened on the surface of the cylinder head, thereby ensuring sealing. The installation structure is simple and convenient to replace.

[0012] 2. In the utility model, by providing a semicircular card cover, a mounting plate, a round hole, a bolt and a nut, two semicircular card covers are clamped on the surface of the sealing ring during installation. When the round holes of two adjacent mounting plates are aligned, the bolt is passed through the two round holes from one side, and then the nut is installed from the other side to perform installation and fixing. The installation steps are reduced and the sealing performance is stronger. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of an actuator of a self-operated regulating valve of the utility model;

[0014] Figure 2 It is a structural schematic diagram of the semicircular card cover position part of the actuator of a self-operated regulating valve of the utility model;

[0015] Figure 3 It is a structural schematic diagram of the threaded plug position of the actuator of a self-operated regulating valve of the utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the positioning column position of the actuator of a self-operated regulating valve of the utility model;

[0017] Figure 5 The utility model is a schematic diagram of the structure of the air groove position of the actuator of the self-operated regulating valve.

[0018] In the figure: 1. cylinder head; 2. diaphragm; 3. sealing ring; 4. positioning column; 5. slot; 6. semicircular card cover; 7. mounting plate; 8. round hole; 9. bolt; 10. nut; 11. ventilation pipe; 12. air groove; 13. fixing pipe; 14. threaded plug. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] like Figure 1-5 As shown, an actuator of a self-operated regulating valve comprises two cylinder heads 1. The two cylinder heads 1 are exactly the same in size and are made of metal. A diaphragm 2 is installed between the two cylinder heads 1. The diaphragm 2 has a certain elasticity. The opposite sides of the two cylinder heads 1 are tightly attached to the surface of the diaphragm 2. A positioning component is arranged between the diaphragm 2 and the cylinder head 1 to facilitate the installation of the diaphragm 2. At the same time, the diaphragm 2 moves when deformed. An annular sealing ring 3 with a C-shaped cross section is sleeved on the surface of the cylinder head 1. The sealing ring 3 is made of rubber and has a certain elasticity. The inner diameter of the sealing ring 3 is slightly smaller than the maximum diameter of the cylinder head 1. At this time, when the sealing ring 3 is installed, it is in a stretched state, which can ensure that the sealing ring 3 is tightened on the surface of the cylinder head 1. The side surface of the cylinder head 1 is tightly connected to the inner wall of the sealing ring 3. A fixing component is fixedly installed on the surface of the cylinder head 1 to fix the sealing ring 3 to the cylinder head 1 to prevent the sealing ring 3 from falling off.

[0021] During installation, the diaphragm 2 is first placed between the two cylinder heads 1 using the positioning assembly, and then the sealing ring 3 is sleeved on the connection position of the two cylinder heads 1 to ensure a stable connection between the two cylinder heads 1, and then the sealing ring 3 is fixed by the fixing assembly to prevent it from falling off and to prevent the two cylinder heads 1 from separating.

[0022] The positioning assembly includes a plurality of positioning posts 4, which are fixed on the surface of the diaphragm 2. The positioning posts 4 and the diaphragm 2 are an integrated structure. The plurality of positioning posts 4 are equidistantly arranged, and both ends of the positioning posts 4 extend to both sides of the diaphragm 2. A plurality of slots 5 are provided on the surface of the cylinder cover 1, and the positioning posts 4 are stuck in the inside of the slots 5. The positioning posts 4 are stuck in the inside of the slots 5 to ensure that the installation position of the diaphragm 2 is accurate and no deviation occurs during sealing.

[0023] The fixing assembly includes two C-shaped semicircular card covers 6, which are made of metal. Mounting plates 7 are fixedly installed at both ends of the semicircular card covers 6. The inner wall shape of the semicircular card covers 6 is adapted to the shape of the sealing ring 3. The two mounting plates 7 are installed and fixed through a connecting assembly. During installation, the two semicircular card covers 6 are clamped on the surface of the sealing ring 3, which can prevent the sealing ring 3 from falling off.

[0024] The connecting component includes a circular hole 8, which is opened on the surface of the mounting plate 7. There are two circular holes 8 on each mounting plate 7, and the circular holes 8 of the two mounting plates 7 correspond to each other. Bolts 9 pass through the inside of the circular holes 8, and nuts 10 are sleeved on the surface of the bolts 9. When the circular holes 8 of two adjacent mounting plates 7 are aligned, the bolts 9 are passed through the two circular holes 8 from one side, and the nuts 10 are installed from the other side to achieve installation and fixation. The installation steps are reduced and the sealing performance is stronger.

[0025] A ventilation pipe 11 is installed on the surface of the diaphragm 2, and an air groove 12 is opened on the surface of the diaphragm 2. The interior of the air groove 12 is connected to the interior of the ventilation pipe 11. A fixing pipe 13 is installed on the surface of one of the cylinder heads 1. The ventilation pipe 11 extends to the interior of the fixing pipe 13. The interior of the fixing pipe 13 is provided with a thread. A threaded plug 14 is installed on the internal thread of the fixing pipe 13. When all are installed, the interior of the ventilation pipe 11 is inflated through the fixing pipe 13, and the gas enters the interior of the air groove 12, so that the diaphragm 2 expands, further improving the sealing performance.

[0026] It should be noted that the utility model is an actuator of a self-operated regulating valve. When in use, the positioning column 4 is clamped in the inside of the clamping groove 5 to ensure that the installation position of the diaphragm 2 is accurate, and then the sealing ring 3 is sleeved on the connection position of the two cylinder heads 1 to ensure the stable connection of the two cylinder heads 1, and then the two semicircular clamping covers 6 are clamped on the surface of the sealing ring 3. When the circular holes 8 of the two adjacent mounting plates 7 are aligned, the bolts 9 are passed through the two circular holes 8 from one side, and the nuts 10 are installed and fixed from the other side. Finally, the interior of the ventilation pipe 11 is inflated through the fixing tube 13, and the gas enters the interior of the air groove 12, so that the diaphragm 2 expands, further improving the sealing performance.

[0027] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. 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, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An actuator for a self-operated regulating valve, comprising two cylinder heads (1), characterized in that: A diaphragm (2) is installed between the two cylinder covers (1), and the opposite sides of the two cylinder covers (1) are tightly attached to the surface of the diaphragm (2). A positioning component is provided between the diaphragm (2) and the cylinder cover (1) to facilitate the installation of the diaphragm (2). An annular sealing ring (3) with a C-shaped cross section is sleeved on the surface of the cylinder cover (1), and the side surface of the cylinder cover (1) is tightly connected to the inner wall of the sealing ring (3). A fixing component is fixedly installed on the surface of the cylinder cover (1) to fix the sealing ring (3) to the cylinder cover (1).

2. The actuator of the self-operated regulating valve according to claim 1, characterized in that: The positioning assembly comprises a plurality of positioning columns (4), the plurality of positioning columns (4) being fixed on the surface of the diaphragm (2), the plurality of positioning columns (4) being equidistantly arranged, the two ends of the positioning columns (4) extending to the two sides of the diaphragm (2), the surface of the cylinder cover (1) being provided with a plurality of slots (5), the positioning columns (4) being stuck inside the slots (5).

3. The actuator of a self-operated regulating valve according to claim 1, characterized in that: The fixing assembly comprises two C-shaped semicircular card covers (6), with mounting plates (7) fixedly mounted at both ends of the semicircular card covers (6), the inner wall shape of the semicircular card covers (6) being adapted to the shape of the sealing ring (3), and the two mounting plates (7) being mounted and fixed via a connecting assembly.

4. The actuator of the self-operated regulating valve according to claim 3 is characterized in that: The connecting assembly comprises a circular hole (8), wherein the circular hole (8) is formed on the surface of the mounting plate (7), the circular holes of the two mounting plates (7) correspond to each other, a bolt (9) passes through the interior of the circular hole (8), and a nut (10) is sleeved on the surface of the bolt (9).

5. The actuator of the self-operated regulating valve according to claim 1, characterized in that: A vent pipe (11) is installed on the surface of the diaphragm (2), an air groove (12) is opened on the surface of the diaphragm (2), the interior of the air groove (12) is connected to the interior of the vent pipe (11), a fixing pipe (13) is installed on the surface of one of the cylinder heads (1), the vent pipe (11) extends to the interior of the fixing pipe (13), and a threaded plug (14) is installed on the internal thread of the fixing pipe (13).

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