Pressure relief balancing device convenient for leakage detection

Abstract

The utility model relates to a pressure relief balancing device convenient for leakage detection, which comprises a pressure relief valve body, two external connecting pipes and two mounting flanges, and further comprises two sealing rings and two connecting rings, the end parts of the outer edges of the sealing rings and the connecting rings which are matched with each other are hermetically connected to form a closed space, and the outer edges of the sealing rings and the connecting rings are arranged in the closed space. The connecting flange and the mounting flange which are matched with each other are located in the closed space, the two sealing rings are each provided with a detection cylinder, one end of each detection cylinder communicates with the corresponding closed space, and the two detection cylinders are each provided with a display mechanism used for displaying pressure increase in the closed space. According to the pressure relief device, the technical problems that the flange connecting position of an existing pressure relief device is prone to pressure relief, and pressure relief is inconvenient to find in time can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to pressure relief balancing device technical field, especially a kind of pressure relief balancing device convenient for leakage detection. BACKGROUND

[0002] The prior art oil and gas storage and transportation engineering is the link connecting oil and gas production, processing, distribution, sales and other links, which mainly includes oil and gas field gathering and transportation, long-distance transportation pipeline, storage and loading and unloading, and urban transportation and distribution system, etc. In the process of transportation, a pressure relief device (pressure relief valve) is needed to maintain pressure balance. The valve type safety pressure relief device is usually used in fluid pipelines and chemical equipment. This type of pressure relief device is mainly composed of a safety valve, a pressure relief pipeline and an exhaust valve. When the pressure exceeds the set value, the safety valve will open, allowing the overpressure fluid to be discharged from the pressure relief pipeline. This type of pressure relief device can be customized according to different pressure environments.

[0003] A kind of oil and gas storage and transportation pressure relief valve is disclosed in Chinese patent No. CN202222707131.6, which includes a valve body, transport pipes are fixedly installed on both sides of the valve body, a flange plate is welded to one end of the transport pipe, a plurality of mounting holes for connecting external pipelines are provided on the surface of the flange plate, limit grooves are provided at the top and bottom of the flange plate, and a sealing ring is connected in the annular groove at one end of the flange plate.

[0004] The above technical solution connects the flange plate with the external pipe and seals by extruding the sealing ring. However, in actual industrial use, the single sealing gasket after installation may not have sufficient compression force, the roughness of the flange joint surface may not be appropriate, the pipeline may be subject to thermal deformation, mechanical vibration, etc., which may cause the sealing gasket and the flange surface to not fit tightly. The rebound force of the sealing gasket may decrease, the sealing gasket material may age, crack, and deteriorate, etc., which may cause flange leakage. Therefore, frequent manual inspection is usually required. If there is slight leakage at the flange connection position, it is not easy to detect by direct observation. It is usually necessary to apply foam or liquid at the flange connection position, and to observe the formation and change of bubbles to determine whether there is leakage, which makes the inspection cumbersome and inconvenient.

[0005] Therefore, the utility model is proposed. UTILITY MODEL CONTENTS

[0006] The utility model provides a pressure relief balancing device convenient for leakage detection to solve the technical problems of easy pressure relief at the flange connection of the existing pressure relief device and inconvenient timely detection of pressure relief.

[0007] The technical solution of the utility model to solve the above technical problems is as follows:

[0008] The utility model provides a pressure relief balancing device convenient for leakage detection, comprising a pressure relief valve body, two outer connecting pipes connected to the both sides of the pressure relief valve body respectively and communicated with the both sides of the pressure relief valve body, and two mounting flanges fixedly connected to the other ends of the two outer connecting pipes respectively, the two mounting flanges are used for sealing connection with the connecting flanges of two pipes respectively, the pressure relief balancing device further comprises two sealing rings slidingly and sealingly connected to the two outer connecting pipes and two connecting rings used for slidingly and sealingly connected to the two pipes, the outer edge ends of the sealing ring and the connecting ring matched are sealingly connected and form a closed space between the sealing ring and the connecting ring, the connecting flanges matched and the mounting flanges are located in the closed space, the two sealing rings are both provided with a detection cylinder communicated with the closed space at one end, and the two detection cylinders are both provided with a display mechanism used for displaying the pressure increase in the closed space.

[0009] The utility model discloses the beneficial effect is: after sealing connection of mounting flange and connecting flange, the sealing ring and the connecting ring matched are sealingly connected and form a closed space, so that the mounting flange and the connecting flange are closed in the closed space, improve the problem that the flange connection of some pressure relief device is easy to relieve pressure, and when pressure relief occurs, the pressure in the closed space increases, and the display mechanism is used for real-time display, so as to solve the technical problem that the pressure relief is inconvenient and timely in the prior art.

[0010] On the basis of the above technical scheme, the utility model can also be improved as follows.

[0011] Further, the first sealing pad is fixed to one side of the mounting flange used for abutting the connecting flange, and the first sealing pad is in annular structure.

[0012] The beneficial effect of the above further scheme is that the sealing structure between the mounting flange and the connecting flange matched is formed by the first sealing pad, and the sealing effect is ensured.

[0013] Further, the first sealing pad is fixed to one side of the mounting flange used for abutting the connecting flange, and the first sealing pad is in annular structure.

[0014] The beneficial effect of the above further scheme is that when the connecting flange and the mounting flange are pressed tightly, the first sealing pad deforms and fills in the clamping groove, and the sealing property is improved.

[0015] Further, the utility model also includes four extrusion rings, one end of the four extrusion rings is fixedly connected to the two sealing rings and the two connecting rings respectively, the other end is all fixedly connected with the second sealing pad, one end of each second sealing pad is fixedly connected to the corresponding extrusion ring, and the other end is abutted to the corresponding mounting flange or connecting flange.

[0016] The beneficial effect of the further scheme is that after the sealing ring and the connecting ring are fastened to form the closed space, the second sealing gasket abuts against the mounting flange or the connecting flange, the extrusion ring and the outside of the second sealing gasket form a space relative to the sealing ring and the connecting ring, and the sliding connection surface of the sealing ring and the sliding connection surface of the connecting ring relative to the outer connecting pipe or the pipeline are located in the space formed by the inside of the extrusion ring, that is, the extrusion deformation of the second sealing gasket forms a sealing effect relative to the sliding connection surfaces of the sealing ring and the connecting ring, thereby improving the sealing effect.

[0017] Further, the two mounting flanges are each fixed with an insertion rod, one end of the insertion rod is fixedly connected to the corresponding mounting flange, and the other end is used for being inserted into the corresponding connecting flange.

[0018] The beneficial effect of the further scheme is that the insertion rod is inserted into the corresponding connecting flange to form a limit, thereby preventing the pipeline and the outer connecting pipe from rotating relative to each other during installation, and affecting the sealing effect.

[0019] Further, the projection of the insertion rod along the length direction is located outside the annular ring formed by the extrusion ring.

[0020] The beneficial effect of the further scheme is that after the insertion rod is inserted into the corresponding connecting flange, the insertion hole formed in the connecting flange is located outside the second sealing gasket of the connecting ring, that is, located in the closed space formed by the outside of the extrusion ring and the second sealing gasket relative to the connecting ring, thereby forming a seal.

[0021] Further, the sealing ring and the connecting ring each have an annular structure, and the outer edge end of the sealing ring and / or the connecting ring is fixed with a protective cylinder, and the mating connecting flange and the mounting flange are located inside the protective cylinder.

[0022] The beneficial effect of the further scheme is that a closed space is formed by the corresponding sealing ring and connecting ring and the protective cylinder.

[0023] Further, the mating sealing ring and / or the connecting ring is fixed with a third sealing gasket, the third sealing gasket is located inside the protective cylinder, and the inner diameter of the third sealing gasket is greater than or equal to the outer diameter of the connecting flange and the mounting flange.

[0024] The beneficial effect of the further scheme is that the third sealing gasket forms a sealing effect relative to the abutting position of the sealing ring and the connecting ring, and forms a closed space among the sealing ring, the connecting ring, and the third sealing gasket.

[0025] Further, the display mechanism comprises a piston plate slidably connected to the inner wall of the detection cylinder, an observation rod fixedly connected to one end of the piston plate, and a reset spring sleeved on the observation rod, the other end of the observation rod is slidably and sealingly connected to the other end of the corresponding detection cylinder and extends out of the other end of the corresponding detection cylinder, and the two ends of the reset spring are fixedly connected to the piston plate and the other end of the detection cylinder respectively.

[0026] The beneficial effect of the further scheme is that when pressure relief occurs, the piston plate is pressed by the pressure, so that the piston plate and the observation rod slide away from the closed space at the same time, and the length of the observation rod sliding out of the detection cylinder is used to realize real-time indication of pressure relief, so that the technical problem of inconvenient and timely discovery of pressure relief in the prior art is solved; and when the maintenance is completed, the piston plate is reset by the reset spring.

[0027] Further, the display mechanism further comprises a mounting rod fixedly connected to the sealing ring, and an alarm is mounted on the mounting rod, and the alarm is arranged corresponding to the other end of the observation rod.

[0028] The beneficial effect of the further scheme is that when leakage occurs and the observation rod is pushed out of the detection cylinder, the observation rod contacts the corresponding alarm to form an alarm prompt. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a burst shot of the pressure relief balancing device of the utility model;

[0030] Figure 2 It is a first partial structure schematic view of the pressure relief balancing device of the utility model, mainly showing the structure of the mounting flange;

[0031] Figure 3 It is a second partial structure schematic view of the pressure relief balancing device of the utility model, mainly showing the structure of the connecting ring;

[0032] Figure 4 It is a partial sectional view of the pressure relief balancing device of the utility model;

[0033] Figure 5 It is Figure 4 It is an enlarged view of A part in the middle.

[0034] In the drawings, the components represented by each reference numeral are listed as follows:

[0035] 1, pipeline; 11, connecting flange;

[0036] 2, pressure relief valve body;

[0037] 3, external pipe;

[0038] 4, mounting flange; 41, clamping groove; 42, first sealing gasket; 43, insertion rod;

[0039] 5, sealing ring; 51, protective cylinder; 52, third sealing gasket;

[0040] 6, connecting ring;

[0041] 7, detection cylinder; 71, piston plate; 72, observation rod; 73, return spring;

[0042] 8, extrusion ring; 81, second sealing gasket;

[0043] 9, mounting rod; 91, alarm. DETAILED DESCRIPTION

[0044] The principles and characteristics of the utility model are described below in combination with the drawings, and the examples are only used to explain the utility model and are not used to limit the scope of the utility model.

[0045] Example 1

[0046] As Figures 1 to 4 A pressure relief balancing device convenient for leakage detection, comprising a pressure relief valve body 2, two external pipes 3 connected to and communicated with both sides of the pressure relief valve body 2 respectively, and two mounting flanges 4 fixedly connected to the other ends of the two external pipes 3 respectively, the two mounting flanges 4 are used for sealed connection with the connecting flanges 11 of the two pipelines 1 respectively, the pressure relief balancing device further comprises two sealing rings 5 slidably and sealingly connected to the two external pipes 3 and two connecting rings 6 used for slidably and sealingly connecting to the two pipelines 1, the outer edge ends of the matched sealing rings 5 and connecting rings 6 are sealingly connected and form a closed space between the sealing rings 5 and the connecting rings 6, the matched connecting flanges 11 and mounting flanges 4 are located in the closed space, both of the two sealing rings 5 are provided with a detection cylinder 7 having one end communicated with the corresponding closed space, and both of the two detection cylinders 7 are provided with a display mechanism for displaying the pressure increase in the closed space.

[0047] The beneficial effects of the embodiment are that after the mounting flanges 4 and the connecting flanges 11 are sealingly connected, the matched sealing rings 5 and connecting rings 6 are sealingly connected and form a closed space, so that the mounting flanges 4 and the connecting flanges 11 are closed in the closed space, the problem that the flange connection of some pressure relief devices is prone to pressure relief is improved, and when pressure relief occurs, the pressure in the closed space increases and is displayed in real time by the display mechanism, so as to solve the technical problem that the pressure relief is inconvenient and not easy to be found in the prior art.

[0048] Among them, the pressure relief valve body 2 is a pressure relief valve commonly used in chemical industry, which is a prior art, so it is not described in detail here; the pipeline 1 is a corresponding oil and gas transportation pipeline connected, and the connecting flange 11 is a flange fixedly connected to the end of the pipeline 1.

[0049] As a specific solution of the above embodiment, the connecting flange 11 and the mounting flange 4, and the outer edge end of the matched sealing ring 5 and the connecting ring 6 are connected by a plurality of bolts (not shown in the figure), and a sealing gasket (not shown in the figure) is arranged on the abutting side of the matched connecting flange 11 and the mounting flange 4, and the matched sealing ring 5 and the connecting ring 6, so as to form a sealed connection.

[0050] Embodiment 2

[0051] As Figure 1 and Figure 2 On the basis of embodiment 1, the first sealing gasket 42 is fixed to one side of each of the two mounting flanges 4 abutting the connecting flange 11, and the first sealing gasket 42 has a ring structure.

[0052] The beneficial effect of the preferred solution in the above embodiment is that the sealing structure between the matched mounting flange 4 and the connecting flange 11 is formed by the first sealing gasket 42, which ensures the sealing effect.

[0053] Among them, the first sealing gasket 42 can be made of rubber, which can be a circular ring structure or a polygonal ring structure.

[0054] Embodiment 3

[0055] As Figure 1 and Figure 2 On the basis of embodiments 1 and 2, the two mounting flanges 4 are each provided with a clamping groove 41, one end of the first sealing gasket 42 is fixed to the clamping groove 41, and the other end extends out of the clamping groove 41.

[0056] The beneficial effect of the preferred solution in the above embodiment is that when the connecting flange 11 and the mounting flange 4 are pressed, the first sealing gasket 42 deforms and fills the clamping groove 41, thereby improving the sealing performance.

[0057] On the basis of the above embodiment, a ring groove corresponding to the clamping groove 41 is also provided on the connecting flange 11, so that the other end of the first sealing gasket 42 extends into the ring groove, thereby improving the sealing effect between the connecting flange 11 and the mounting flange 4.

[0058] Embodiment 4

[0059] As Figure 1 and Figure 2 On the basis of embodiments 1-3, four extrusion rings 8 are further included, one end of each of the four extrusion rings 8 is fixedly connected to two sealing rings 5 and two connecting rings 6, and the other end of each of the four extrusion rings 8 is fixedly connected with a second sealing gasket 81, one end of each of the second sealing gaskets 81 is fixedly connected to the corresponding extrusion ring 8, and the other end of each of the second sealing gaskets 81 abuts against the corresponding mounting flange 4 or connecting flange 11.

[0060] The beneficial effect of the preferred solution in the above embodiment is that after the sealing ring 5 and the connecting ring 6 are fastened to form a closed space, the second sealing gasket 81 abuts against the mounting flange 4 or the connecting flange 11, the extrusion ring 8 and the outer side of the second sealing gasket 81 form a closed space relative to the sealing ring 5 and the connecting ring 6, and the sliding connection surface of the sealing ring 5 and the sliding connection surface of the connecting ring 6 relative to the outer connecting pipe 3 or the pipeline 1 are located in the space formed by the extrusion ring 8 on the inner side of the extrusion ring 8, that is, the extrusion deformation of the second sealing gasket 81 forms a sealing effect relative to the sliding connection surfaces of the sealing ring 5 and the connecting ring 6, thereby improving the sealing effect.

[0061] At the same time, under the extrusion action of the extrusion ring 8, the mating mounting flange 4 and the connecting flange 11 are extruded towards each other, thereby improving the sealing effect therebetween.

[0062] The extrusion ring 8 can be made of a metal material such as steel or iron, and one end thereof is circumferentially connected to the sealing ring 5 or the connecting ring 6, for example, is integrally formed. The second sealing gasket 81 can be made of rubber.

[0063] On the basis of the above embodiment, a ring groove is formed at the other end of the extrusion ring 8 (not shown in the figure), and one end of the second sealing gasket 81 is fixedly connected to the bottom of the ring groove, so as to guide the deformation of the second sealing gasket 81 through the ring groove.

[0064] Embodiment 5

[0065] As Figures 1 to 3 On the basis of the embodiments 1-4, the two mounting flanges 4 are each fixedly connected with a plug rod 43, one end of the plug rod 43 is fixedly connected to the corresponding mounting flange 4, and the other end is used for being inserted into the corresponding connecting flange 11.

[0066] The beneficial effect of the preferred solution in the above embodiment is that the insertion of the plug rod 43 into the corresponding connecting flange 11 forms a limit, thereby preventing the relative rotation of the pipeline 1 and the outer connecting pipe 3 during the installation process, and affecting the sealing effect.

[0067] As a specific solution of the above embodiment, the plug rod 43 can be a square rod or a round rod. A matching insertion hole is formed in the connecting flange 11.

[0068] On the basis of the above embodiment, the insertion hole can be a through hole or a blind hole. When it is a blind hole, the sealing effect can be relatively ensured.

[0069] Embodiment 6

[0070] As Figures 1 to 3 On the basis of the embodiments 1-5, the projection of the plug rod 43 along the length direction is located on the outer side of the circular ring formed by the extrusion ring 8.

[0071] The beneficial effect of the preferred solution in the above embodiment is that, after the insertion rod 43 is inserted into the corresponding connecting flange 11, the insertion hole in the connecting flange 11 is located outside the second sealing gasket 81 of the connecting ring 6, i.e. in the closed space formed by the extrusion ring 8, the second sealing gasket 81 outside the connecting ring 6, thereby forming a seal.

[0072] Embodiment 7

[0073] As Figures 1 to 4 On the basis of embodiments 1-6, the sealing ring 5 and the connecting ring 6 are both annular structures, and a protective cylinder 51 is fixed to the outer edge end of the sealing ring 5 and / or the connecting ring 6.

[0074] The beneficial effect of the preferred solution in the above embodiment is that a closed space is formed by the corresponding sealing ring 5 and connecting ring 6 and protective cylinder 51.

[0075] Among them, the end of the protective cylinder 51 away from the sealing ring 5 and / or the connecting ring 6 is outwardly folded and integrally formed with a folded edge, and the folded edge is provided with a plurality of bolt holes for the bolts to pass through and achieve fastening connection.

[0076] As a specific solution of the above embodiment, the sealing ring 5 and the connecting ring 6 are both circular plate annular structures, and only the outer edge end of the sealing ring 5 is fixed with the protective cylinder 51; or only the outer edge end of the connecting ring 6 is fixed with the protective cylinder 51; and, or the outer edge end of the sealing ring 5 and the connecting ring 6 are both fixed with the protective cylinder 51.

[0077] Embodiment 8

[0078] As Figures 1 to 4 On the basis of embodiments 1-7, the sealing ring 5 and / or the connecting ring 6 are fixed with a third sealing gasket 52, the third sealing gasket 52 is located inside the protective cylinder 51, and the inner diameter of the third sealing gasket 52 is greater than or equal to the outer diameter of the connecting flange 11 and the mounting flange 4.

[0079] The beneficial effect of the preferred solution in the above embodiment is that the third sealing gasket 52 forms a sealing effect outside the abutting position of the sealing ring 5 and the connecting ring 6, forms a closed space between the sealing ring 5, the connecting ring 6 and the third sealing gasket 52, and forms a sealing effect inside the abutting position of the connecting flange 11 and the mounting flange 4.

[0080] Among them, the third sealing gasket 52 can be made of rubber.

[0081] As a specific solution of the above-mentioned embodiment, a third sealing gasket 52 is fixed on the sealing ring 5 or the connecting ring 6, and the length of the third sealing gasket 52 is greater than the axial length of the sealing ring 5 or the connecting ring 6 close to the third sealing gasket 52, so that the third sealing gasket 52 can form a sealing effect on the abutting position of the sealing ring 5 and the connecting ring 6 after the sealing ring 5 and the connecting ring 6 are connected.

[0082] Or a third sealing gasket 52 is fixed on the sealing ring 5 and the connecting ring 6, and the length of one of the third sealing gaskets 52 is greater than the length of the sealing ring 5 or the connecting ring 6 close to the third sealing gasket 52, and the length of the other third sealing gasket 52 is less than the length of the connecting ring 6 or the sealing ring 5 close to the third sealing gasket 52, so as to form a sealing effect on the abutting position of the sealing ring 5 and the connecting ring 6.

[0083] Embodiment 9

[0084] As Figure 1 And Figure 2 On the basis of Embodiments 1-8, the display mechanism includes a piston plate 71 slidably connected to the inner wall of the detection cylinder 7, an observation rod 72 fixedly connected to one end of the piston plate 71, and a reset spring 73 sleeved on the observation rod 72, the other end of the observation rod 72 is slidably and sealingly connected to the other end of the corresponding detection cylinder 7 and extends out of the other end of the corresponding detection cylinder 7, and the two ends of the reset spring 73 are fixedly connected to the piston plate 71 and the other end of the detection cylinder 7, respectively.

[0085] The beneficial effect of using the preferred solution in the above-mentioned embodiment is that when pressure relief occurs, the piston plate is pressed by the pressure, so that the piston plate and the observation rod slide away from the closed space at the same time, and the length of the observation rod sliding out of the detection cylinder is used to realize real-time indication of pressure relief, so as to solve the technical problem that pressure relief is not convenient and timely in the prior art; after maintenance is completed, the piston plate is reset by the reset spring.

[0086] On the basis of the above-mentioned embodiment, a through hole is formed in the detection cylinder 7 along the length direction of the detection cylinder 7, and the through hole is a stepped hole, one end of the detection cylinder 7 connected to the closed space is a large end, and the other end is a small end, the piston plate 71 is slidably connected to the large end hole of the detection cylinder 7, and the other end of the observation rod 72 is slidably connected to and extends out of the small end hole of the detection cylinder 7.

[0087] On the basis of the above-mentioned embodiment, the piston plate 71 can be made of rubber, and the piston plate 71 and the hole wall of the detection cylinder 7 abut each other to ensure the sealing effect and prevent the piston plate 71 from automatically sliding under the action of gravity when the detection cylinder 7 is in a vertical state.

[0088] The other end of the observation rod 72 is also sealingly connected to the small hole end hole wall of the detection cylinder 7.

[0089] A scale is arranged on the observation rod 72 to realize accurate measurement observation.

[0090] Embodiment 10

[0091] As Figure 4 And Figure 5 On the basis of the embodiments 1-9, the display mechanism further comprises a mounting rod 9 fixedly connected to the sealing ring 5, and an alarm 91 is mounted on the mounting rod 9, and the alarm 91 is arranged at the other end of the observation rod 72.

[0092] The beneficial effect of the preferred scheme in the above embodiments is that when the leakage occurs and the observation rod 72 is pushed out of the detection cylinder 7, the observation rod 72 is in contact with the corresponding alarm 91, and an alarm prompt is formed.

[0093] The alarm 91 can adopt a proximity switch, and the trigger part is arranged opposite to the end of the observation rod 72, and the alarm 91 can be in communication connection with the central control, so as to realize centralized observation control.

[0094] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0095] In addition, the terms "first", "second" are only for description purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0096] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0097] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature is "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or it only means that the horizontal height of the first feature is higher than that of the second feature. The first feature is "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or it only means that the horizontal height of the first feature is less than that of the second feature.

[0098] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or features of different embodiments or examples described in the present application without contradiction.

[0099] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. Those skilled in the art can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A pressure relief balancing device facilitating leakage detection, comprising a pressure relief valve body (2), two external connecting pipes (3) respectively connected to and communicated with two sides of the pressure relief valve body (2), and two mounting flanges (4) respectively fixedly connected to the other ends of the two external connecting pipes (3), the two mounting flanges (4) being respectively used for sealingly connecting with connecting flanges (11) of two pipelines (1), characterized in that, The pressure relief balancing device further comprises two sealing rings (5) slidably and sealingly connected to the two outer connecting pipes (3) and two connecting rings (6) for slidably and sealingly connecting to the two pipes (1), the outer edge ends of the matched sealing rings (5) and connecting rings (6) are sealingly connected and form a closed space between the sealing rings (5) and the connecting rings (6), the matched connecting flanges (11) and the mounting flanges (4) are located in the closed space, both of the sealing rings (5) are provided with a detection cylinder (7) with one end communicating with the corresponding closed space, both of the detection cylinders (7) are provided with a display mechanism for displaying the pressure increase in the closed space.

2. The pressure relief equalizing device of claim 1, wherein, Both of the mounting flanges (4) are fixed with a first sealing gasket (42) on one side abutting the connecting flange (11), and the first sealing gasket (42) has a ring structure.

3. The pressure relief equalizing device of claim 2, wherein, Both of the mounting flanges (4) are provided with a clamping groove (41), one end of the first sealing gasket (42) is fixed in the clamping groove (41), and the other end extends out of the clamping groove (41).

4. The pressure relief equalizing device of claim 1, wherein, Further comprising four extrusion rings (8), one end of each of the four extrusion rings (8) is fixedly connected to the two sealing rings (5) and the two connecting rings (6), and the other end is fixedly connected with a second sealing gasket (81), one end of each of the second sealing gaskets (81) is fixedly connected to the corresponding extrusion ring (8), and the other end abuts the corresponding mounting flange (4) or connecting flange (11).

5. The pressure relief equalizing device of claim 4, wherein, Both of the mounting flanges (4) are fixed with an insertion rod (43), one end of the insertion rod (43) is fixedly connected to the corresponding mounting flange (4), and the other end is used for inserting into the corresponding connecting flange (11).

6. The pressure relief equalizing device of claim 5, wherein, The projection of the insertion rod (43) along its length direction is located outside the formed ring of the extrusion ring (8).

7. The pressure relief equalizing device of any one of claims 1-6, wherein, Both of the sealing rings (5) and the connecting rings (6) have a ring structure, and the outer edge ends of the sealing rings (5) and / or the connecting rings (6) are fixed with a protective cylinder (51), and the matched connecting flanges (11) and the mounting flanges (4) are located inside the protective cylinder (51).

8. The pressure relief equalizing device of claim 7, wherein, The matched sealing rings (5) and / or the connecting rings (6) are fixed with a third sealing gasket (52), the third sealing gasket (52) is located inside the protective cylinder (51), and the inner diameter of the third sealing gasket (52) is greater than or equal to the outer diameter of the connecting flange (11) and the mounting flange (4).

9. The pressure relief equalizing device of any one of claims 1-6, wherein, The display mechanism comprises a piston plate (71) slidably connected to the inner wall of the detection cylinder (7), an observation rod (72) fixedly connected to one end of the piston plate (71), and a reset spring (73) sleeved on the observation rod (72), the other end of the observation rod (72) is slidably and sealingly connected to the other end of the corresponding detection cylinder (7) and extends out of the other end of the corresponding detection cylinder (7), and both ends of the reset spring (73) are fixedly connected to the piston plate (71) and the other end of the detection cylinder (7).

10. The pressure relief equalizing device of claim 9, wherein, The display mechanism further comprises a mounting rod (9) fixedly connected to the sealing ring (5), and an alarm (91) is mounted on the mounting rod (9), and the alarm (91) is arranged in correspondence with the other end of the observation rod (72).

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