Safety valve

Abstract

A safety valve comprises an upper valve body and a lower valve body, the upper valve body and the lower valve body are connected through a plurality of fastening screws, an adjusting nut is arranged at the top of the upper valve body, a threaded rod is arranged in the adjusting nut in a matched mode, a cushion block is arranged at the bottom of the threaded rod, and an adjusting assembly is arranged at the top of the cushion block. The adjusting assembly is connected with the upper valve body, an annular air bag is arranged on the outer side of the adjusting assembly, the annular air bag is connected with the outer wall of the upper valve body, the annular air bag can be matched with a plurality of fastening screws, a spring is arranged at the bottom of the cushion block, and an exhaust assembly is arranged at the bottom of the spring. The exhaust assembly is connected with the interior of the lower valve body, an exhaust pipe is arranged on one side of the lower valve body, and the problems that when a conventional safety valve is continuously opened and closed to release or maintain pressure in a system, a fastening screw connected with the valve body may be loosened due to repeated stress, and the fastening screw mounting efficiency is low are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a safety valve. Background Art

[0002] Valves are a common component on various types of equipment, and valves themselves are divided into many types according to actual usage requirements. One of the more special ones is the safety valve. Unlike other valves, which only serve as switches, more importantly, they protect the safety of equipment use. Safety valves are automatic valves and are mainly used in boilers, pressure vessels and pipelines. They play a vital role in protecting equipment. Safety valves are in a normally closed state under the action of external forces during use. When the pressure of the medium exceeds the specified value, the safety valve can discharge the medium to prevent damage to the equipment or pipeline due to excessive medium pressure. Safety valves are mainly divided into two categories: spring type and lever type. Depending on the usage requirements, they are also divided into closed type and non-closed type. Select the corresponding safety valve according to actual usage needs.

[0003] However, in actual use, the safety valve needs to withstand greater pressure during use, and its installation method is mostly fixed by bolts and flange connections. When the safety valve is frequently operated, that is, constantly opened and closed to release or maintain the pressure in the system, the fastening screws connected to the valve body may loosen due to repeated force. Especially when the system pressure changes sharply, the force on the fastening screws may increase instantaneously, thereby increasing the risk of loosening. As the adjusting nut compresses the spring and increases the set pressure of the safety valve, the reaction force of the spring on the upper valve body further increases, which will further aggravate the loosening of the fastening screws. In addition, during the installation of the safety valve, the installation efficiency is low due to the large number of fastening screws. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a safety valve. Through this design, it effectively solves the problem that when a conventional safety valve is continuously opened and closed to release or maintain the pressure in the system, the fastening screws connected to the valve body may loosen due to repeated force. Especially when the system pressure changes sharply, the force exerted on the fastening screws may increase instantaneously, thereby increasing the risk of loosening, and the problem of low efficiency in installing the fastening screws.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: the present invention includes an upper valve body and a lower valve body, which are connected to each other by a plurality of fastening screws, an adjusting nut is provided on the top of the upper valve body, a threaded rod is matched inside the adjusting nut, a pad is provided on the bottom of the threaded rod, an adjusting assembly is provided on the top of the pad, the adjusting assembly is connected to the upper valve body, an annular airbag is provided on the outside of the adjusting assembly, the annular airbag is connected to the outer wall of the upper valve body, the annular airbag can cooperate with a plurality of fastening screws, a spring is provided at the bottom of the pad, an exhaust assembly is provided at the bottom of the spring, the exhaust assembly is connected to the inside of the lower valve body, and an exhaust pipe is provided on one side of the lower valve body.

[0006] Preferably, the adjustment assembly includes two cylinders, and the two cylinders are symmetrically arranged with the axial center line of the threaded rod as the symmetry axis, and a connecting pipe is provided on the outer side of the top of the cylinder.

[0007] Preferably, a piston plate is provided inside the cylinder, a vertical rod is provided at the bottom of the piston plate, and the bottom of the vertical rod is connected to the top of the cushion block.

[0008] Preferably, a connecting pipe is provided on the outer side of the bottom of the cylinder, the connecting pipe is connected to the upper valve body, and the outer side of the connecting pipe is connected to the annular airbag.

[0009] Preferably, the exhaust assembly includes a circular tube, a recoil disc is provided on the top of the circular tube, a sleeve is provided on the top of the recoil disc, and the sleeve is connected to a spring.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] By adjusting the cooperation of the nut, spring and exhaust assembly, the opening pressure of the safety valve can be adjusted, so that the safety valve can adapt to the pressure requirements of different systems and provide precise pressure control. By adjusting the cooperation of the gasket, adjusting assembly and annular airbag, the annular airbag can contact the outside of the fastening screw after inflation, thereby increasing the friction force of the fastening screw rotation, which can effectively prevent the fastening screw from loosening when the safety valve is adjusted to high and low pressure. By adjusting the cooperation of the nut, adjusting assembly and annular airbag, multiple fastening screws are fixed before the upper valve body is installed, which speeds up the efficiency of the installation and docking of the upper and lower valve bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] Figure 2 It is a cross-sectional perspective schematic diagram of the present utility model.

[0014] Figure 3It is a cross-sectional schematic diagram of the upper valve body and the lower valve body of the utility model.

[0015] Figure 4 This is a schematic diagram of the matching structure of the adjusting nut and the spring of the utility model.

[0016] Figure 5 For this utility model Figure 4 A partial enlarged schematic diagram of part A in the middle.

[0017] Figure 6 This is a schematic diagram of the matching structure of the pad and the piston plate of the utility model.

[0018] Numbers in the figure: 101, upper valve body; 102, lower valve body; 103, exhaust pipe; 104, adjusting nut; 105, threaded rod; 106, spacer; 107, spring; 108, sleeve; 109, recoil disc; 110, round tube; 111, fastening screw; 201, annular airbag; 202, connecting pipe; 203, connecting pipe; 204, cylinder; 205, piston plate; 206, vertical rod. DETAILED DESCRIPTION

[0019] The following is combined with Figures 1-6 The specific implementation methods of the present utility model are further described in detail.

[0020] Example 1:

[0021] The utility model comprises an upper valve body 101 and a lower valve body 102, which are connected to each other by a plurality of fastening screws 111. An adjusting nut 104 is provided on the top of the upper valve body 101. The upper valve body 101 and the lower valve body 102 serve as the main structure of the safety valve and are tightly connected by a plurality of fastening screws 111 to ensure the overall strength and sealing of the valve body. This design facilitates maintenance and replacement of internal components and also ensures the stable operation of the valve body under different working conditions. The internal arrangement of the adjusting nut 104 is The upper valve body 101 is provided with a threaded rod 105, a pad 106 is provided at the bottom of the threaded rod 105, the bottom of the threaded rod 105 is rotatably connected to the pad 106, and a spring 107 is provided at the bottom of the pad 106. An adjusting nut 104 is provided at the top of the upper valve body 101, and the threaded rod 105 is matched with the inner part thereof. By rotating the adjusting nut 104, the overall height of the threaded rod 105 can be adjusted, thereby changing the preload force of the spring 107, that is, setting the opening pressure of the safety valve. This adjustment mechanism enables the safety valve to adapt to the pressure of different systems. To meet the demand and provide precise pressure control, an exhaust assembly is provided at the bottom of the spring 107, which is interconnected with the interior of the lower valve body 102. An exhaust pipe 103 is provided on one side of the lower valve body 102. The exhaust assembly includes a round tube 110, a recoil disc 109 is provided on the top of the round tube 110, a sleeve 108 is provided on the top of the recoil disc 109, and the sleeve 108 is connected to the spring 107. A pad 106 is provided at the bottom of the threaded rod 105, and a spring 107 is connected below the pad 106. The spring 107 serves as a safety valve. The core elastic element plays the role of storing energy and providing opening force. When the system pressure rises to the preset value, the spring 107 is compressed to a certain extent, and the safety valve is opened. Under normal conditions, the recoil disc 109 and the circular tube 110 fit together. When the pressure on the valve increases, the recoil disc 109 is pushed up to discharge the high-pressure gas. The released excess pressure medium is safely discharged to the external environment or a designated recovery system through the exhaust pipe 103, ensuring that the system pressure is quickly reduced to a safe level.

[0022] Example 2:

[0023] On the basis of Example 1, this embodiment takes into account that when the device is in use, the preset pressure of the safety valve can be adjusted by rotating the adjusting nut 104. However, while increasing the preset pressure, since the spring 107 is compressed, the reaction force of the spring 107 on the pad 106 and the upper valve body 101 also increases. When the safety valve is frequently opened and closed to release or maintain the pressure in the system, the fastening screw 111 connected to the upper valve body 101 may loosen due to repeated force.

[0024] Specifically, an adjusting component is provided on the top of the pad 106, and the adjusting component is connected to the upper valve body 101. The adjusting component is located inside the upper valve body 101, and an annular airbag 201 is provided on the outside of the adjusting component. The annular airbag 201 is connected to the outer wall of the upper valve body 101. The adjusting component can inflate the annular airbag 201 as the pad 106 moves. The annular airbag 201 can cooperate with multiple fastening screws 111. When the annular airbag 201 is inflated, it can contact the outer side of the fastening screw 111, thereby increasing the friction force of the fastening screw 111 when rotating, which can effectively prevent the fastening screw 111 from loosening when the safety valve is adjusted to high and low pressure, and prevent gaps from appearing between the upper valve body 101 and the lower valve body 102, causing poor internal sealing.

[0025] The adjusting assembly includes two cylinders 204, and the two cylinders 204 are symmetrically arranged with the axial center line of the threaded rod 105 as the symmetry axis. A connecting pipe 203 is provided on the outside of the top of the cylinder 204. The connecting pipe 203 can ensure the stability of the air pressure on the top of the piston plate 205. A piston plate 205 is provided inside the cylinder 204, and a vertical rod 206 is provided at the bottom of the piston plate 205. The bottom of the vertical rod 206 is connected to the top of the cushion block 106. When the adjusting nut 104 is rotated, the threaded rod 105 can be driven to rise and fall, thereby driving the rotationally connected cushion block 106 to rise and fall. The two vertical rods 206 are slidably connected to the piston plate 205 and the cylinder 204, thereby constraining the cushion block 106 to only rise and fall vertically, and cooperating with the rotation of the adjusting nut 104 to complete the adjustment of the height of the cushion block 106, thereby The stroke of the spring 107 is adjusted to change the set pressure value of the safety valve. A connecting pipe 202 is provided on the outer side of the bottom of the cylinder 204. The connecting pipe 202 is connected to the upper valve body 101, and the outer side of the connecting pipe 202 is connected to the annular airbag 201. As the pad 106 continues to descend, the vertical rod 206 and the piston plate 205 will be driven to move downward synchronously, and the gas at the bottom of the piston plate 205 will be discharged into the annular airbag 201 through the connecting pipe 202. That is to say, the higher the set pressure of the valve, the shorter the spring 107 is compressed, and the greater the reaction force of the spring 107 on the upper valve body 101, which may cause the fastening screw 111 to loosen. Through the cooperation of the pad 106, the adjusting component and the annular airbag 201, the loosening of the fastening screw 111 can be effectively suppressed.

[0026] Example 3:

[0027] On the basis of Example 2, this embodiment takes into account that when installing the device, due to the large number of fastening screws 111, the staff needs to first check the hole positions of the upper valve body 101 and the lower valve body 102, and then insert the fastening screws 111 in sequence, which is inefficient.

[0028] Specifically, during installation, first quickly insert the four fastening screws 111 into the screw holes of the upper valve body 101, and then rotate the adjusting nut 104 to drive the gasket 106 to descend, and cooperate with the adjusting component to inflate the inside of the annular airbag 201, so that the annular airbag 201 expands as a whole, and begins to conflict with the outer walls of multiple fastening screws 111, fix the tops of multiple fastening screws 111, and then drive the upper valve body 101 to start docking with the lower valve body 102. Through the guidance of the four fastening screws 111, the upper valve body 101 and the lower valve body 102 can be quickly aligned with each other, and then the fastening screws 111 and the corresponding nuts are rotated and fixed, so that the upper valve body 101 and the lower valve body 102 are tightly connected, which speeds up the installation efficiency of the upper valve body 101 and the lower valve body 102.

[0029] When the present invention is in use, the opening pressure of the safety valve is adjusted by adjusting the cooperation of the nut 104, the spring 107 and the exhaust component, so that the safety valve can adapt to the pressure requirements of different systems and provide precise pressure control. Through the cooperation of the gasket 106, the adjusting component and the annular airbag 201, the annular airbag 201 can contact the outer side of the fastening screw 111 after inflation, thereby increasing the friction force of the fastening screw 111 when rotating, and can effectively prevent the fastening screw 111 from loosening when the safety valve is adjusted to high and low pressure. Through the cooperation of the adjusting nut 104, the adjusting component and the annular airbag 201, multiple fastening screws 111 are fixed before the upper valve body 101 is installed, which speeds up the efficiency of the installation and docking of the upper valve body 101 and the lower valve body 102.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A safety valve, comprising an upper valve body (101) and a lower valve body (102), characterized in that: The upper valve body (101) and the lower valve body (102) are connected to each other through a plurality of fastening screws (111); an adjusting nut (104) is provided on the top of the upper valve body (101); a threaded rod (105) is provided inside the adjusting nut (104); a pad (106) is provided at the bottom of the threaded rod (105); an adjusting component is provided on the top of the pad (106); the adjusting component is connected to the upper valve body (101); an annular airbag (201) is provided on the outside of the adjusting component; the annular airbag (201) is connected to the outer wall of the upper valve body (101); the annular airbag (201) can cooperate with the plurality of fastening screws (111); a spring (107) is provided at the bottom of the pad (106); an exhaust component is provided at the bottom of the spring (107); the exhaust component is connected to the inside of the lower valve body (102); an exhaust pipe (103) is provided on one side of the lower valve body (102).

2. A safety valve according to claim 1, characterized in that: The regulating assembly comprises two cylinders (204), the two cylinders (204) being symmetrically arranged with the axial center line of the threaded rod (105) as the symmetry axis, and a connecting pipe (203) being provided on the outer side of the top of the cylinder (204).

3. A safety valve according to claim 2, characterized in that: A piston plate (205) is provided inside the cylinder (204), a vertical rod (206) is provided at the bottom of the piston plate (205), and the bottom of the vertical rod (206) is connected to the top of the cushion block (106).

4. A safety valve according to claim 3, characterized in that: A connecting pipe (202) is provided on the outer side of the bottom of the cylinder (204), the connecting pipe (202) is connected to the upper valve body (101), and the outer side of the connecting pipe (202) is connected to the annular airbag (201).

5. A safety valve according to claim 1, characterized in that: The exhaust assembly comprises a circular tube (110), a recoil disc (109) is provided on the top of the circular tube (110), a sleeve (108) is provided on the top of the recoil disc (109), and the sleeve (108) and the spring (107) are connected to each other.

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