Elastic cavity assembly structure and operating device thereof

Abstract

The utility model belongs to the technical field of electric power protection devices, and particularly discloses an elastic cavity assembly structure and an operation device thereof, the elastic cavity assembly structure comprises an elastic cavity assembly main body and an operation device main body, the elastic cavity assembly main body comprises a transmission rod, an elastic cavity, a lower end cover, an inner layer elastic element, an outer layer elastic element and an upper end cover, an elastic cavity is formed between the outer-layer elastic element and the inner-layer elastic element, a center hole is formed in the middle of the upper end cover, the transmission rod penetrates through the center hole and is fixed to the lower end cover, and the transmission rod synchronously conducts reciprocating rectilinear motion along with elastic deformation of the elastic elements. According to the device, the elastic cavity is filled with high-pressure fluid, and the elastic cavity can be sealed under the condition of high pressure in the cavity. In addition, the operation device matched with the structure of the elastic cavity assembly is used for disassembling the filling and sealing process into a plurality of simple actions, so that the operation difficulty of filling and sealing the high-pressure fluid into the elastic cavity is greatly reduced, the working efficiency is improved, and the accuracy of the filling pressure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power protection devices, in particular to an elastic cavity assembly structure and its operating device. Background Technique

[0002] The relay protection of the power system operates in the event of an accident or abnormal operation of the power system, and is an automatic device to ensure the safe operation of the power system and electrical equipment. In a modern power system, without a relay protection device, it is impossible to maintain the normal operation of the power system.

[0003] The insulating gas density relay is an important protection and control component in the power system. Among them, the temperature compensation accuracy is an important performance parameter of the density relay. High-precision temperature compensation requires filling a specific fluid into the inner cavity of the elastic sensitive element for temperature compensation, and the filling pressure of the fluid required for temperature compensation often reaches 5 standard atmospheres or even higher. The filling pressure accuracy requirement is relatively high. Therefore, a structure and an operating device for filling and sealing high-pressure fluid into the elastic cavity are needed, which can not only complete the filling of high-pressure fluid, but also seal the high-pressure cavity after filling without leakage. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an elastic cavity assembly structure and its operating device to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: an elastic cavity assembly structure, including an elastic cavity assembly main body, the elastic cavity assembly main body includes a transmission rod, an elastic cavity, a lower end cover, an inner elastic element, an outer elastic element and an upper end cover. The outer elastic element and the inner elastic element are coaxially nested. The elastic cavity is between the outer elastic element and the inner elastic element. The upper end cover and the lower end cover are arranged at both ends of the inner elastic element and the outer elastic element. A central hole is opened in the middle of the upper end cover. The transmission rod passes through the central hole and is fixed to the lower end cover. The transmission rod makes a reciprocating linear motion synchronously with the elastic deformation of the elastic element.

[0006] Preferably, both ends of the outer elastic element and the inner elastic element are welded to the upper end cover and the lower end cover respectively to ensure complete sealing at the connection.

[0007] Preferably, a through hole is opened on the side of the upper end cover. The through hole is in the shape of a cylindrical counterbore. The through hole is the only communication channel between the elastic cavity and the external environment. During filling, the fluid enters the cavity through the through hole. When the filling pressure reaches the design value, the through hole is blocked to realize the fluid filling and sealing of the elastic cavity.

[0008] In summary, the present utility model also provides an operating device with an elastic cavity assembly structure, which includes an operating device main body. The operating device main body includes a housing, a bottom plate, a limit sleeve, a push rod, and a first joint. The bottom plate and the limit sleeve are respectively arranged at the end of the bottom plate. A first joint is fixed above the housing. A guiding hole is opened in the middle of the first joint. The push rod is inserted into the guiding hole. A second joint is fixed on the side of the first joint. A plug is arranged inside the second joint. A sealing steel ball is arranged at the end of the plug. A bracket is fixed above the first joint. A threaded column passes through the middle of the bracket. The threaded column is threadedly connected with the bracket. An installation cavity is arranged inside the housing. The elastic cavity assembly main body is fixed inside the installation cavity. The limit sleeve and the upper end cover are fixedly connected to each other.

[0009] Preferably, the threaded column and the push rod are coaxially arranged, and the end of the threaded column contacts the push rod.

[0010] Preferably, the guiding hole of the first joint is thick at the top and thin at the bottom, with a tapered transition in the middle. The inner diameter of the thin section of the guiding hole is larger than the diameter of the sealing steel ball.

[0011] After the first joint is connected to the housing, the guiding hole of the first joint extends into and penetrates the inner hole. The second joint, the first joint, the installation cavity, the penetrating inner hole, and the elastic cavity are interconnected.

[0012] Preferably, a first O-ring is arranged between the push rod and the first joint, a second O-ring is arranged between the plug and the second joint, a third O-ring is arranged between the limit sleeve and the upper end cover, and a fourth O-ring is arranged between the bottom plate and the housing. Sealed connection is achieved by setting O-rings.

[0013] Preferably, a connection channel is opened on the bottom plate. The connection channel is a channel for connecting the installation cavity to the external environment.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] By designing an elastic cavity assembly structure, the present utility model realizes the filling of high-pressure fluid into the elastic cavity and can complete the sealing of the elastic cavity under high pressure inside the cavity. In addition, in cooperation with an operating device with an elastic cavity assembly structure, the filling and sealing process is disassembled into multiple simple actions, greatly reducing the operation difficulty of filling and sealing high-pressure fluid into the elastic cavity, improving the work efficiency, and improving the accuracy of the filling pressure. The qualified rate of the leakage rate after sealing is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the elastic cavity assembly structure of the present utility model;

[0017] Figure 2This is a schematic structural diagram of the operating device for the elastic cavity assembly of the present utility model.

[0018] In the figure: 10. Main body of the elastic cavity assembly; 101. Transmission rod; 102. Penetrating inner hole; 103. Elastic cavity; 104. Lower end cover; 105. Inner layer elastic element; 106. Outer layer elastic element; 107. Upper end cover; 20. Main body of the operating device; 201. Threaded post; 202. Bracket; 203. First O-ring; 204. Thrust rod; 205. Second O-ring; 206. Sealing steel ball; 207. Second joint; 208. Plug; 209. Limit sleeve; 210. Third O-ring; 211. Housing; 212. Fourth O-ring; 213. Base plate; 214. Installation cavity; 215. First joint. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0021] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] Please refer to Figure 1-2, the present utility model provides a technical solution: an elastic cavity assembly structure, including an elastic cavity assembly main body 10, the elastic cavity assembly main body 10 includes a transmission rod 101, an elastic cavity 103, a lower end cover 104, an inner elastic element 105, an outer elastic element 106 and an upper end cover 107. The outer elastic element 106 and the inner elastic element 105 are coaxially nested. The elastic cavity 103 is between the outer elastic element 106 and the inner elastic element 105. The upper end cover 107 and the lower end cover 104 are arranged at both ends of the inner elastic element 105 and the outer elastic element 106. A central hole is opened in the middle of the upper end cover 107. The transmission rod 101 passes through the central hole and is fixed to the lower end cover 104. The transmission rod 101 makes a reciprocating linear motion synchronously with the elastic deformation of the elastic element.

[0023] Furthermore, both ends of the outer elastic element 106 and the inner elastic element 105 are welded to the upper end cover 107 and the lower end cover 104 respectively to ensure that the connection is completely sealed.

[0024] Furthermore, a through hole 102 is opened on the side of the upper end cover 107. The through hole 102 is in the shape of a cylindrical counterbore. The through hole 102 is the only communication channel between the elastic cavity 103 and the external environment. During filling, the fluid enters the cavity through the through hole 102. When the filling pressure reaches the designed value, the through hole 102 is blocked to realize the fluid filling and sealing of the elastic cavity 103.

[0025] Furthermore, in summary, the present utility model also provides an operating device for the elastic cavity assembly structure, including an operating device main body 20. The operating device main body 20 includes a housing 211, a bottom plate 213, a limit sleeve 209, a push rod 204 and a first joint 215. The bottom plate 213 and the limit sleeve 209 are respectively arranged at the end of the bottom plate 213. A first joint 215 is fixed above the housing 211. A guiding hole is opened in the middle of the first joint 215. The push rod 204 is inserted into the guiding hole. A second joint 207 is fixed on the side of the first joint 215. A plug 208 is arranged inside the second joint 207. A sealing steel ball 206 is arranged at the end of the plug 208. A bracket 202 is fixed above the first joint 215. A threaded column 201 passes through the middle of the bracket 202. The threaded column 201 is threadedly connected with the bracket 202. An installation cavity 214 is arranged inside the housing 211. The elastic cavity assembly main body 10 is fixed in the installation cavity 214. The limit sleeve 209 and the upper end cover 107 are fixed to each other.

[0026] Furthermore, the threaded column 201 and the push rod 204 are coaxially arranged, and the end of the threaded column 201 contacts the push rod 204.

[0027] Furthermore, the guiding hole of the first connector 215 is shaped such that it is thicker at the top and thinner at the bottom, with a tapered transition in the middle, and the inner diameter of the thin section of the guiding hole is larger than the diameter of the sealing steel ball 206.

[0028] Furthermore, after the first connector 215 is connected to the housing 211, the guiding hole of the first connector 215 extends into and penetrates through the inner hole 102, and the second connector 207, the first connector 215, the installation cavity 214, the through inner hole 102, and the elastic cavity 103 are interconnected.

[0029] Furthermore, a first O-ring 203 is provided between the ejector rod 204 and the first connector 215, a second O-ring 205 is provided between the plug 208 and the second connector 207, a third O-ring 210 is provided between the limit sleeve 209 and the upper end cover 107, and a fourth O-ring 212 is provided between the bottom plate 213 and the housing 211. By providing the O-rings, sealed connection is achieved.

[0030] Furthermore, a connection channel is provided on the bottom plate 213, and the connection channel is a channel for connecting the installation cavity 214 to the external environment.

[0031] Working principle: The main body 10 of the elastic cavity assembly is fixedly installed in the installation cavity 214, fixedly connecting the bottom plate 213 and the housing 211, and the elastic cavity 103 is communicated with the installation cavity 214 through the through inner hole 102.

[0032] The threaded column 201 is adjusted by threading to the lowest limit position, and the ejector rod 204 is pushed downward to the lowest limit position, and the inner hole of the second connector 207 and the guiding hole of the first connector 215 are temporarily blocked.

[0033] The sealing steel ball 206 is placed in the inner hole of the second connector 207, and the plug 208 is fixedly installed, so that the installation cavity 214 is sealed from the external environment at the position of the second connector 207. At this time, the movement range of the sealing steel ball 206 is restricted in the inner hole of the second connector 207, and the installation cavity 214 can only communicate with the external environment through the through hole of the bottom plate 213.

[0034] The through hole of the bottom plate 213 is connected to a fluid source, and the fluid passes through the installation cavity 214 and the through inner hole 102 and enters the elastic cavity 103, starting the filling process.

[0035] After the filling pressure reaches the designed value, the outlet of the fluid source is closed, and the pressures in the installation cavity 214, the elastic cavity 103, the guiding hole of the first connector 215, and the inner hole of the second connector 207 are the same and remain constant. The threaded column 201 is rotated and adjusted to the highest limit position, and the ejector rod 204 rises synchronously with the threaded column 201 under the action of the fluid pressure in the installation cavity 214, and the inner hole of the second connector 207 is communicated with the guiding hole of the first connector 215 and allows the sealing steel ball 206 to pass through.

[0036] The counterclockwise swing operating device, the sealing steel ball 206 rolls along the inner hole of the second joint 207 and the guiding hole of the first joint 215 under the action of gravity, and finally falls into the thick section of the through inner hole 102. The lower end of the guiding hole of the first joint 215 is narrowed and slightly larger than the diameter of the sealing steel ball 206, and the lower end of the guiding hole of the first joint 215 extends into the thick section of the through inner hole 102 to ensure the accurate position of the sealing steel ball 206 before press-fitting. The rotation adjustment screw column 201 descends to push the ejector rod 204 to move downward. During the downward movement of the ejector rod 204, a downward pressure is applied to the sealing steel ball 206 to press the sealing steel ball 206 into the thin section of the through inner hole 102. The sealing steel ball 206 is in a tightened state in the thin section of the through inner hole 102, can withstand the high pressure in the elastic cavity 103 without coming out, and the leakage rate after sealing meets the design requirements.

[0037] It should be noted that: the whole device is controlled by the total control button. Since the device matched with the control button is a common device and belongs to the existing mature technology, the electrical connection relationship and the specific circuit structure are not described in detail here.

[0038] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An elastic cavity component structure, characterized in that: It includes an elastic cavity component body (10), and the elastic cavity component body (10) includes a transmission rod (101), an elastic cavity (103), a lower end cover (104), an inner elastic element (105), an outer elastic element (106) and an upper end cover (107). The outer elastic element (106) and the inner elastic element (105) are coaxially nested. An elastic cavity (103) is formed between the outer elastic element (106) and the inner elastic element (105). The upper end cover (107) and the lower end cover (104) are arranged at both ends of the inner elastic element (105) and the outer elastic element (106). A central hole is formed in the middle of the upper end cover (107), and the transmission rod (101) passes through the central hole and is fixed to the lower end cover (104).

2. The structure of an elastic cavity component according to claim 1, wherein: Both ends of the outer elastic element (106) and the inner elastic element (105) are welded to the upper end cover (107) and the lower end cover (104) respectively.

3. The elastic cavity component structure according to claim 1, characterized in that: A through hole (102) is formed on the side of the upper end cover (107), and the through hole (102) is in the shape of a cylindrical counterbore.

4. An operating device for an elastic cavity component structure, comprising the elastic cavity component structure according to any one of claims 1-3, characterized in that: It includes an operating device body (20), and the operating device body (20) includes a housing (211), a bottom plate (213), a limit sleeve (209), a push rod (204) and a first joint (215). The bottom plate (213) and the limit sleeve (209) are respectively arranged at the end of the bottom plate (213). A first joint (215) is fixed above the housing (211). A guide hole is formed in the middle of the first joint (215), and the push rod (204) is inserted into the guide hole. A second joint (207) is fixed on the side of the first joint (215). A plug (208) is arranged inside the second joint (207), and a sealing steel ball (206) is arranged at the end of the plug (208). A bracket (202) is fixed above the first joint (215). A threaded column (201) passes through the middle of the bracket (202), and the threaded column (201) is threadedly connected with the bracket (202). An installation cavity (214) is arranged inside the housing (211), and the elastic cavity component body (10) is fixed in the installation cavity (214). The limit sleeve (209) and the upper end cover (107) are fixed to each other.

5. The operating device of an elastic cavity component structure according to claim 4, characterized in that: The threaded column (201) and the push rod (204) are coaxially arranged, and the end of the threaded column (201) contacts the push rod (204).

6. The operating device of an elastic cavity component structure according to claim 4, wherein: The guide hole of the first joint (215) is thick at the top and thin at the bottom, with a tapered transition in the middle, and the inner diameter of the thin section of the guide hole is larger than the diameter of the sealing steel ball (206).

7. The operating device of an elastic cavity component structure according to claim 4, characterized in that: A first O-ring (203) is arranged between the push rod (204) and the first joint (215), a second O-ring (205) is arranged between the plug (208) and the second joint (207), a third O-ring (210) is arranged between the limit sleeve (209) and the upper end cover (107), and a fourth O-ring (212) is arranged between the bottom plate (213) and the housing (211).

8. The operating device of an elastic cavity component structure according to claim 4, characterized in that: A connection channel is formed on the bottom plate (213).

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