Spring type safety valve

Abstract

A spring type safety valve comprises an upper valve body and a lower valve body, the upper valve body and the lower valve body are matched with each other through a plurality of fastening screws, a lifting assembly is arranged in the upper valve body, a tray is arranged at the bottom of the lifting assembly, a spring is arranged at the bottom of the tray, an end cover is arranged at the bottom of the spring, and a recoil disc is arranged at the bottom of the end cover. A high-pressure pipe is arranged at the bottom of the recoil disc in a matched mode and connected with the bottom of the lower valve body, one side of the bottom of the lower valve body communicates with an exhaust pipe, a locking assembly is arranged on the outer side of the lower valve body, and two supporting blocks are arranged on the upper portion of the lower valve body. The two supporting blocks are symmetrically arranged with the axial center line of the exhaust pipe as the symmetry axis, clamping jaws are arranged at the tops of the supporting blocks and matched with the locking assemblies, and the problems that a spring of a conventional safety valve cannot be rapidly and conveniently replaced, and when the spring is replaced, shutdown is needed for replacement, and the replacement efficiency is high are effectively solved. And the production efficiency is influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a spring type 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] The working principle of a spring-loaded safety valve is to rely on the elastic pressure of the spring to lock the valve's valve disc or plunger and other sealing components. When the pressure in the pressure vessel rises abnormally, the generated high pressure will overcome the spring pressure of the safety valve, causing the locking device to be pushed open, forming a pressure relief channel to release the high pressure. Over time, the spring may wear out due to fatigue, corrosion or high temperature, resulting in a decrease in elasticity. If the degree of wear or insufficient rebound force is severe, it has affected the normal operation of the safety valve or poses a safety hazard. In this case, the spring needs to be replaced in a timely manner. However, existing safety valves cannot quickly and conveniently replace the spring, and when replacing the spring, the machine needs to be shut down for replacement, which affects production efficiency. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the existing technology, the present invention provides a spring-type safety valve. Through this design, it effectively solves the problem that the spring of the conventional safety valve cannot be replaced quickly and conveniently, and when the spring is replaced, the machine needs to be stopped for replacement, which affects production efficiency.

[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, the upper valve body and the lower valve body cooperate with each other through a plurality of fastening screws, a lifting assembly is provided inside the upper valve body, a tray is provided at the bottom of the lifting assembly, a spring is provided at the bottom of the tray, an end cover is provided at the bottom of the spring, a recoil disc is provided at the bottom of the end cover, a high-pressure pipe is cooperated with the bottom of the recoil disc, the high-pressure pipe is connected to the bottom of the lower valve body, one side of the bottom of the lower valve body is connected to the exhaust pipe, a locking assembly is provided on the outside of the lower valve body, two support blocks are provided on the upper part of the lower valve body, the two support blocks are symmetrically arranged with the axial center line of the exhaust pipe as the axis of symmetry, a claw is provided on the top of the support block, and the claw cooperates with the locking assembly.

[0006] Preferably, the lifting assembly includes a first threaded rod, the first threaded rod is threadedly connected to the upper valve body, a first knob is provided on the top of the first threaded rod, and the bottom of the first threaded rod is rotatably connected to the tray.

[0007] Preferably, a valve cover is provided on the top of the upper valve body.

[0008] Preferably, two telescopic rods are provided at the bottom of the recoil disc, and the two telescopic rods are symmetrically arranged with the high-pressure pipe as the symmetry axis, and the bottoms of the telescopic rods are connected to the inside of the lower valve body.

[0009] Preferably, the locking assembly includes a second threaded rod, which is threadedly connected to one side of the lower valve body, and a threaded hole is provided on the side of the end cover close to the second threaded rod, and the threaded hole cooperates with the second threaded rod, and a second knob is provided on the outside of the second threaded rod.

[0010] Preferably, a sleeve is provided on the inner side of the second knob, the sleeve is rotatably connected to the second threaded rod, a support rod is provided on the outer side of the sleeve, two connecting rods are provided on the outer side of the support rod, and the two connecting rods are symmetrically arranged with the axial center line of the second threaded rod as the axis of symmetry.

[0011] Preferably, a slider is provided on the inner side of the connecting rod, and two sliding grooves are provided on the outer side of the lower valve body. The two sliding grooves are symmetrically arranged with the axial center line of the second threaded rod as the symmetry axis. The slider is slidingly connected to the sliding groove, and a pin is provided on the outer side of the slider. The pin is rotatably connected to the connecting rod, and a frame is provided on the outer side of the pin.

[0012] Preferably, two cylindrical rods are provided on the inner side of the top of the frame, and the two cylindrical rods are symmetrically arranged with the slider as the symmetry axis. Two grooves are provided on the outer side of the bottom of the claw, and the cylindrical rods are slidably connected to the corresponding grooves.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] By controlling the second threaded rod to fix the position of the end cover, the recoil disc is in close contact with the high-pressure pipe to prevent gas leakage during the spring replacement process. After the internal spring is replaced, the height of the tray is adjusted, and then the upper valve body and the lower valve body are docked. The upper valve body is first fixed by two claws to quickly restore the normal use of the safety valve, which speeds up the efficiency of spring replacement. Then, the tightening of multiple fastening screws is completed in sequence. The action of the claws can effectively prevent the fastening screws connected to the valve body from loosening due to repeated force when the safety valve is continuously opened and closed. The cooperation of the fastening screws and the claws can further ensure the airtightness of the upper and lower valve bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 It is a half-section three-dimensional schematic diagram of the present invention.

[0017] Figure 3 It is a plan view of the upper valve body and the lower valve body of the utility model.

[0018] Figure 4 This is a schematic diagram of the matching structure of the second knob and the claw of the utility model.

[0019] Figure 5 This is a schematic diagram of the matching structure of the sleeve and the claws of the utility model.

[0020] Figure 6 This is a schematic diagram of the cooperation structure between the frame and the claws of the utility model.

[0021] Numbers in the figure: 101, valve cover; 102, upper valve body; 103, fastening screw; 104, lower valve body; 105, exhaust pipe; 106, first knob; 107, first threaded rod; 108, tray; 109, spring; 110, end cover; 111, telescopic rod; 112, recoil disc; 113, high-pressure pipe; 201, second knob; 202, second threaded rod; 203, sleeve; 204, support rod; 205, connecting rod; 206, slider; 207, slide groove; 208, frame; 209, claw; 210, support block; 211, cylindrical rod; 212, groove. DETAILED DESCRIPTION

[0022] The following is combined with Figures 1-6 The specific implementation methods of the present utility model are further described in detail.

[0023] Example 1:

[0024] The utility model includes an upper valve body 102 and a lower valve body 104, and the upper valve body 102 and the lower valve body 104 cooperate with each other through a plurality of fastening screws 103. The upper valve body 102 and the lower valve body 104 are the main structures of the safety valve, and they cooperate with each other through a plurality of fastening screws 103 to form a closed space. This design ensures the structural integrity and sealing of the safety valve. A lifting assembly is provided inside the upper valve body 102. The lifting assembly is located inside the upper valve body 102 and is a key component for realizing the lifting of the tray 108. By adjusting the height of the lifting assembly, the compression degree of the tray 108 and the spring 109 below it can be changed, thereby adjusting the initial pressure value of the safety valve. A tray 108 is provided at the bottom of the lifting assembly, and a spring 109 is provided at the bottom of the tray 108. An end cover 110 is provided at the bottom of the spring 109, and a recoil disc 112 is provided at the bottom of the end cover 110. The tray 108 is in direct contact with the spring 109. The tray 108 and the end cover 110 are in direct contact with each other. The design ensures that the spring 109 can be evenly stressed and transmits the force to the recoil disc 112 below. The spring 109 is located at the bottom of the tray 108 and is one of the core components of the safety valve. The elasticity and compression degree of the spring 109 determine the opening pressure and return pressure of the safety valve. When the pressure in the container exceeds the allowable value, the spring 109 is compressed, causing the end cover 110 and the recoil disc 112 to rise, opening the safety valve to relieve pressure. The bottom of the recoil disc 112 is equipped with a high-pressure pipe 113, which is connected to the bottom of the lower valve body 104. The end cover 110 is located at the bottom of the spring 109, used to fix the spring 109 and prevent it from falling off. The recoil disc 112 is located at the bottom of the end cover 110 and cooperates with the high-pressure pipe 113 to change the direction of the medium flow and increase the opening force. The bottom side of the lower valve body 104 is connected to the exhaust pipe 105, and the high-pressure pipe 113 is connected to the bottom of the lower valve body 104, which is the channel for the medium to enter the safety valve. The exhaust pipe 105 is connected to the bottom side of the lower valve body 104 and is used to discharge the depressurized medium.

[0025] The lifting assembly includes a first threaded rod 107, which is threadedly connected to the upper valve body 102. A first knob 106 is provided on the top of the first threaded rod 107, and the bottom of the first threaded rod 107 is rotatably connected to the tray 108. The rotation of the first knob 106 drives the first threaded rod 107 to rotate, so that the first threaded rod 107 can be lifted and lowered while rotating, thereby driving the rotatably connected tray 108 to lift and lower.

[0026] A valve cover 101 is provided on the top of the upper valve body 102 . The valve cover 101 and the upper valve body 102 are clamped together. The valve cover 101 can seal and dustproof the first knob 106 and the first threaded rod 107 .

[0027] Two telescopic rods 111 are provided at the bottom of the recoil disk 112. The two telescopic rods 111 are symmetrically arranged with the high-pressure tube 113 as the axis of symmetry. The bottoms of the telescopic rods 111 are interconnected with the interior of the lower valve body 104. The two telescopic rods 111 can constrain the vertical rise and fall of the recoil disk 112, preventing the recoil disk 112 from tilting due to the skewness of the spring 109, which would cause gas leakage.

[0028] Example 2:

[0029] On the basis of Example 1, this embodiment takes into account that when the device is in use, the spring 109 may age, which may cause the safety valve to be unusable, and the overall replacement cost is too high. Conventional safety valves cannot quickly and conveniently replace the spring 109, and when replacing the spring 109, the machine needs to be shut down for replacement, affecting production efficiency.

[0030] A locking assembly is provided on the outer side of the lower valve body 104, and two support blocks 210 are provided on the upper part of the lower valve body 104. The two support blocks 210 are symmetrically arranged with the axial center line of the exhaust pipe 105 as the axis of symmetry. A claw 209 is provided on the top of the support block 210. The claw 209 cooperates with the locking assembly. The locking assembly can adjust the flipping state of the claw 209, thereby realizing the clamping and release of the upper valve body 102 and the lower valve body 104.

[0031] The locking assembly includes a second threaded rod 202, which is threadedly connected to one side of the lower valve body 104. A threaded hole is provided on the side of the end cover 110 close to the second threaded rod 202, and the threaded hole cooperates with the second threaded rod 202. A second knob 201 is provided on the outside of the second threaded rod 202. Rotating the second knob 201 drives the second threaded rod 202 to rotate. As the second threaded rod 202 rotates, it moves toward the inside of the lower valve body 104, and then docks with the threaded hole of the end cover 110. The second threaded rod 202 extends into the interior of the end cover 110 to fix the end cover 110.

[0032] A sleeve 203 is provided on the inner side of the second knob 201, and the inner side of the second knob 201 is fixedly connected to the sleeve 203. The rotation of the second knob 201 can drive the sleeve 203 to rotate. The sleeve 203 is rotatably connected to the second threaded rod 202, and the sleeve 203 can move inward along with the second threaded rod 202. A support rod 204 is provided on the outer side of the sleeve 203, and two connecting rods 205 are provided on the outer side of the support rod 204. The two connecting rods 205 are symmetrically arranged with the axial center line of the second threaded rod 202 as the axis of symmetry. The sleeve 203 can drive the support rod 204 rotatably connected on the outer side to move inward, and the support rod 204 pushes the connecting rods 205 on both sides to deviate inward.

[0033] A slider 206 is provided on the inner side of the connecting rod 205, and two slide grooves 207 are provided on the outer side of the lower valve body 104. The two slide grooves 207 are symmetrically arranged with the axial center line of the second threaded rod 202 as the axis of symmetry. The slider 206 is slidably connected to the slide groove 207. Under the constraint of the slide groove 207, it can be ensured that the two sliders 206 can only be lifted and lowered vertically. When the two connecting rods 205 move inward, the slider 206 will be driven to move vertically downward in the slide groove 207. A pin is provided on the outer side of the slider 206, and the pin is rotatably connected to the connecting rod 205. A frame 208 is provided on the outer side of the pin, and the slider 206 drives the frame 208 to move vertically downward through the pin.

[0034] Two cylindrical rods 211 are provided on the inner side of the top of the frame 208. The two cylindrical rods 211 are symmetrically arranged with the slider 206 as the axis of symmetry. The lowering of the frame 208 drives the two cylindrical rods 211 to descend synchronously. Two grooves 212 are provided on the outer side of the bottom of the claw 209. The cylindrical rods 211 are slidably connected with the corresponding grooves 212. When the cylindrical rod 211 moves downward, it will slide inside the groove 212, thereby pulling the claw 209 to flip outward, releasing the constraint on the upper valve body 102, and the upper valve body 102 can be disassembled by rotating the fastening screw 103.

[0035] When the present invention is used, when the spring 109 fails, it is necessary to quickly replace the internal spring 109, control the second threaded rod 202 to rotate, start to move inward, and then cooperate with the end cover 110 to fix the position of the end cover 110, so that the recoil disk 112 is in close contact with the high-pressure pipe 113 to prevent gas leakage during the process of replacing the spring 109. When replacing the spring 109, it is necessary to appropriately reduce the operating speed of the production equipment to prevent the pressure from increasing during the process of replacing the spring 109. With the continuous rotation of the second threaded rod 202, the connecting rod 205 can be driven to move inward, thereby reducing the height of the two frames 208 and making the claws 209 flip outward, and synchronously start to disassemble the four fastening screws 103, so that the upper valve body 102 can be disassembled and the internal spring 109 can be replaced. Rotate the first The second threaded rod 202 is reversed to make the two claws 209 start to rotate inward, thereby fastening the upper valve body 102. Since the height of the tray 108 has been adjusted before, the safety valve can be directly adjusted to the set pressure at this time. Subsequently, the end cover 110 is released from the cooperation with the second threaded rod 202, and the upper valve body 102 is first fixed by the two claws 209 to quickly restore the normal use of the safety valve, which speeds up the efficiency of replacing the spring 109, and then the tightening of multiple fastening screws 103 is completed in sequence. Under the action of the claws 209, the safety valve can be effectively prevented from being continuously opened and closed. The fastening screws 103 connected to the valve body may be loosened due to repeated force. Through the cooperation of the fastening screws 103 and the claws 209, the airtightness of the upper valve body 102 and the lower valve body 104 can be further ensured.

[0036] 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 spring-loaded safety valve comprising an upper valve body (102) and a lower valve body (104), characterized in that: The upper valve body (102) and the lower valve body (104) cooperate with each other through a plurality of fastening screws (103). A lifting assembly is provided inside the upper valve body (102). A tray (108) is provided at the bottom of the lifting assembly. A spring (109) is provided at the bottom of the tray (108). An end cover (110) is provided at the bottom of the spring (109). A recoil disc (112) is provided at the bottom of the end cover (110). A high-pressure pipe (113) is provided at the bottom of the recoil disc (112). The high-pressure pipe (113) is interconnected with the bottom of the lower valve body (104), and one side of the bottom of the lower valve body (104) is connected to the exhaust pipe (105). A locking assembly is provided on the outer side of the lower valve body (104), and two support blocks (210) are provided on the upper part of the lower valve body (104). The two support blocks (210) are symmetrically arranged with the axial center line of the exhaust pipe (105) as the symmetry axis. A claw (209) is provided on the top of the support block (210), and the claw (209) cooperates with the locking assembly.

2. A spring-loaded safety valve according to claim 1, characterized in that: The lifting assembly comprises a first threaded rod (107), the first threaded rod (107) being threadedly connected to the upper valve body (102), a first knob (106) being provided at the top of the first threaded rod (107), and a bottom of the first threaded rod (107) being rotatably connected to the tray (108).

3. A spring-loaded safety valve according to claim 1, characterized in that: A valve cover (101) is provided on the top of the upper valve body (102).

4. A spring-loaded safety valve according to claim 1, characterized in that: Two telescopic rods (111) are provided at the bottom of the recoil disc (112). The two telescopic rods (111) are symmetrically arranged with the high-pressure pipe (113) as a symmetry axis. The bottoms of the telescopic rods (111) are connected to the inside of the lower valve body (104).

5. The spring-loaded safety valve according to claim 1, characterized in that: The locking assembly includes a second threaded rod (202), the second threaded rod (202) is threadedly connected to one side of the lower valve body (104), the end cover (110) is provided with a threaded hole on a side close to the second threaded rod (202), the threaded hole and the second threaded rod (202) cooperate with each other, and a second knob (201) is provided on the outer side of the second threaded rod (202).

6. A spring-loaded safety valve according to claim 5, characterized in that: A sleeve (203) is provided on the inner side of the second knob (201), the sleeve (203) being rotatably connected to the second threaded rod (202), a support rod (204) being provided on the outer side of the sleeve (203), two connecting rods (205) being provided on the outer side of the support rod (204), the two connecting rods (205) being symmetrically arranged with the axial center line of the second threaded rod (202) as the axis of symmetry.

7. A spring-loaded safety valve according to claim 6, characterized in that: A slider (206) is provided on the inner side of the connecting rod (205), and two slide grooves (207) are provided on the outer side of the lower valve body (104). The two slide grooves (207) are symmetrically arranged with the axial center line of the second threaded rod (202) as the symmetry axis. The slider (206) is slidably connected to the slide groove (207). A pin is provided on the outer side of the slider (206), and the pin is rotatably connected to the connecting rod (205). A frame (208) is provided on the outer side of the pin.

8. A spring-loaded safety valve according to claim 7, characterized in that: Two cylindrical rods (211) are provided on the inner side of the top of the frame (208), and the two cylindrical rods (211) are symmetrically arranged with the slider (206) as the symmetry axis. Two grooves (212) are provided on the outer side of the bottom of the claw (209), and the cylindrical rods (211) are slidably connected to the corresponding grooves (212).

Images