Pressure relief device for non-metal part pressure test

Abstract

The utility model discloses a pressure relief device for a pressure test of a non-metal part, and relates to the technical field of pressure relief devices. Comprising a connecting shell; the first fixing piece is fixedly connected into the connecting shell, and a plurality of through holes are formed in the first fixing piece; the first fixing shell is fixedly connected to the first fixing piece, the first fixing piece and the first fixing shell are jointly connected with a first sliding piece in a sliding mode, and the side, away from the first fixing shell, of the first sliding piece is fixedly connected with a connecting frame. The utility model provides a method for enhancing the sealing performance of a sealing ring by enhancing the sealing force of the sealing ring through pressure, specifically, the pressure applied to the interior of a reaction kettle is utilized to generate extrusion force on the sealing ring, that is, the larger the pressure in the reaction kettle is, the larger the extrusion force applied to the sealing ring is, and the sealing performance of the sealing ring is enhanced. In this way, the sealing failure of the sealing ring caused by the influence of the high-pressure environment can be effectively avoided, and the safety of equipment under the high-pressure condition is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pressure relief devices, in particular to a pressure relief device for non-metal part pressure testing. BACKGROUND

[0002] Non-metal part pressure testing is a test to evaluate the performance and durability of non-metal materials under different pressure conditions, mainly used to ensure the safety and reliability of materials in actual application. Common pressure testing types include hydrostatic testing, gas pressure testing, cyclic pressure testing, etc. Gas pressure testing usually consists of a reaction kettle, a pressurizing device, a pressure relief device, and a monitoring device. Its working principle is as follows:

[0003] 1. Place the sample in the reaction kettle; 2. The pressurizing device gradually pressurizes the reaction kettle to increase the pressure inside the reaction kettle; 3. During the pressurizing process, the monitoring device monitors the compression resistance of the sample in real time; 4. If the pressure inside the reaction kettle exceeds the predetermined safety value, the pressure relief device will automatically open and release excess gas to prevent damage to the equipment or sample due to overpressure; 5. If the pressure inside the reaction kettle does not exceed the predetermined safety value, continue to increase the pressure inside the reaction kettle; 6. When the pressure inside the reaction kettle reaches the required pressure of the sample, the pressure relief device actively discharges the gas inside the reaction kettle; 7. During the gas discharge process, the monitoring device continues to monitor the changes of the sample in the decompression environment; 8. When the pressure inside the reaction kettle is stable, turn off all related equipment; 9. Finally, take the sample out of the reaction kettle.

[0004] During use, the pressure inside the reaction kettle continues to increase, so the sealing ring in the pressure relief device will abnormally, causing the sealing performance between it and the contact surface to decrease. For example, rubber sealing rings are prone to hardening, brittleness, and loss of elasticity under high pressure, thereby affecting their sealing effect, which may eventually lead to gas leakage in the reaction kettle. SUMMARY

[0005] To solve the above problems, the present application provides a pressure relief device for non-metal part pressure testing.

[0006] The technical scheme is as follows: a pressure relief device for non-metal part pressure testing, comprising:

[0007] a connecting shell;

[0008] a first fixing member fixedly connected in the connecting shell, wherein the first fixing member is provided with a plurality of through holes;

[0009] A first fixed shell is fixed to the first fixing member, the first fixing member and the first fixed shell are jointly connected with a first sliding member, one side of the first sliding member away from the first fixed shell is fixed with a connecting frame, the connecting frame is fixed with extrusion columns consistent with the number of through holes on the first fixing member;

[0010] A fixed frame is fixed in the connecting shell, and the fixed frame is fixed with a second fixed shell that is in sliding cooperation with the first sliding member;

[0011] A connecting pipe is fixed and communicated with the connecting shell, the connecting pipe is fixed and communicated with the second fixed shell, the first fixing member is located between the two sides of the connecting pipe, and the connecting shell is fixed with a third fixed shell for protecting the connecting pipe;

[0012] A limiting assembly is arranged on the third fixed shell and used for limiting the movement of the first sliding member;

[0013] A plugging assembly is arranged in the connecting shell and used for changing the plugging mode of all through holes on the first fixing member.

[0014] In addition, it is particularly preferred that the limiting assembly comprises:

[0015] A fourth fixed shell is fixed and communicated with the connecting pipe, the fourth fixed shell is fixed with the third fixed shell, and the first fixing member is fixed with a spring telescopic rod used for driving the first sliding member to reset;

[0016] A second sliding member is in sliding connection with the fourth fixed shell, the fourth fixed shell is provided with a spring fixed with the second sliding member, the connecting shell, the first fixed shell and the third fixed shell are jointly connected with a first limiting frame, the first limiting frame is used for limiting the first sliding member, and the second sliding member is fixed with the first limiting frame.

[0017] In addition, it is particularly preferred that the limiting assembly further comprises:

[0018] A sliding plate is in sliding connection with the fourth fixed shell, and the sliding plate is fixed with the spring on the second sliding member;

[0019] A rotating member is in threaded connection with the fourth fixed shell, one side of the rotating member in the fourth fixed shell is in limiting rotation cooperation with the sliding plate, and the second sliding member penetrates through the rotating member and is in sliding cooperation with the rotating member;

[0020] A blocking member is fixed to the second sliding member, penetrates through and is in sliding fit with the connecting shell and the third fixed shell, and is used to block the connecting pipe. An L-shaped cavity is arranged in the blocking member, and the L-shaped cavity in the blocking member is used to communicate the connecting pipe and the connecting shell.

[0021] In addition, it is particularly preferred that the blocking assembly comprises:

[0022] Air guide members are consistent with the number of through holes on the first fixed member, and are respectively fixed in adjacent through holes on the first fixed member;

[0023] Sealing members are consistent with the number of extrusion columns, and are respectively fixed in adjacent extrusion columns. The air guide member is provided with a limiting groove on the side facing the adjacent sealing member, the limiting groove is in communication with the connecting shell, the sealing member is in contact with the adjacent limiting groove, the air guide member is provided with a ventilation groove on the side away from the adjacent sealing member, the ventilation groove is in communication with the connecting shell, the air guide member is provided with a plurality of inclined holes distributed at intervals, the inclined holes are used to communicate the adjacent ventilation grooves and the adjacent limiting grooves, and the sealing member is in blocking fit with the adjacent inclined hole.

[0024] In addition, it is particularly preferred that the cross section of the ventilation groove is a right trapezoid, and the upper base of the right trapezoid on the cross section of the ventilation groove is close to the adjacent sealing member.

[0025] In addition, it is particularly preferred that the limiting groove is a circular truncated cone groove, and the side of the extrusion column close to the adjacent ventilation groove is a circular truncated cone.

[0026] In addition, it is particularly preferred that the sealing member is made of a soft and deformable material, and the cross section of the sealing member is a trapezoid. The side with large diameter on the sealing member is larger than the side with large diameter on the adjacent limiting groove, the side with small diameter on the sealing member is larger than the side with small diameter on the adjacent limiting groove, and the depth of the limiting groove is greater than the length of the adjacent sealing member.

[0027] In addition, it is particularly preferred that the edge line of the cross section of the sealing member is not parallel to the edge line of the cross section of the side of the limiting groove on the adjacent air guide member.

[0028] In addition, it is particularly preferred that the blocking assembly further comprises:

[0029] A second limiting frame is in sliding connection with the first fixed member, used to limit the movement distance of the first sliding member, and the second limiting frame is in limiting fit with the first fixed shell.

[0030] In addition, it is particularly preferred that the blocking assembly further comprises:

[0031] An adjusting assembly is arranged in the connecting shell and used for adjusting the position of the second limiting frame, and the adjusting assembly comprises:

[0032] A second fixing member is fixed to the fixing frame.

[0033] A rotating member is rotatably connected to the second fixing member, and a threaded groove is arranged in the rotating member. A fixing pin is fixed to the second limiting frame and slidably matches the threaded groove in the rotating member.

[0034] The present application has the advantages that the present application proposes a method of enhancing the sealing performance of the sealing ring by enhancing the sealing force of the sealing ring through pressure in order to solve the problem of sealing failure of the sealing ring caused by abnormality of the sealing ring in a high-pressure environment, specifically, the pressure applied in the reaction kettle generates extrusion force on the sealing ring, that is, the greater the pressure in the reaction kettle, the greater the extrusion force on the sealing ring, which can effectively avoid the sealing failure of the sealing ring caused by the high-pressure environment and ensure the safety of the equipment under high-pressure conditions.

[0035] When testing the compression resistance of the sample, the threshold value in the connecting shell can be changed by adjusting the pressure of the sliding plate on the adjacent spring, so as to achieve the purpose of flexibly adjusting the threshold value, which has the advantage of controlling the discharge of excess gas in the reaction kettle according to the test requirements of different samples, improving the safety and flexibility of the test.

[0036] When testing the compression resistance of the sample, the position of the first sliding member can be adjusted to adjust the amount of gas discharged in the same time when the gas in the reaction kettle is normally discharged, so as to achieve the purpose of flexibly adjusting the gas discharge speed and improve the diversity and flexibility of the test. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 It is a schematic diagram of the three-dimensional structure of the present application;

[0038] Figure 2 It is a schematic diagram of the three-dimensional structure of the third fixed shell of the present application;

[0039] Figure 3 It is a sectional view of the three-dimensional structure of the connecting shell of the present application;

[0040] Figure 4 It is a sectional view of the three-dimensional structure of the connecting pipe of the present application;

[0041] Figure 5 It is a sectional view of the three-dimensional structure of the first fixed shell of the present application;

[0042] Figure 6 It is a sectional view of the three-dimensional structure of the fourth fixed shell of the present application;

[0043] Figure 7 Another perspective view of the three-dimensional structure of the fixing frame of the present application;

[0044] Figure 8 A three-dimensional structure sectional view of the second fixing member and the rotating member of the present application.

[0045] In the figure, 11 is a connecting shell, 12 is a first fixing member, 13 is a first fixing shell, 14 is a first sliding member, 15 is a connecting frame, 151 is an extrusion column, 16 is a fixing frame, 17 is a second fixing shell, 18 is a connecting pipe, 19 is a third fixing shell, 21 is a fourth fixing shell, 22 is a second sliding member, 23 is a first limiting frame, 24 is a sliding plate, 25 is a rotating member, 31 is a gas guide member, 32 is a sealing member, 33 is a limiting groove, 34 is a ventilation groove, 35 is an inclined hole, 41 is a second limiting frame, 42 is a second fixing member, 43 is a rotating member, and 44 is a transmission member. DETAILED DESCRIPTION

[0046] Although the present application can be described with respect to particular applications or industries, those skilled in the art will recognize that the present application has a much broader scope. Those of ordinary skill in the art will recognize that terms such as: downward, upward, etc. are used to describe the drawings and are not meant to limit the present application in any way. Any numerical designations such as: first or second are merely illustrative and are not intended to limit the scope of the present application in any way.

[0047] To solve the problem that the sealing ring in the existing pressure relief device is affected by high pressure, causing abnormal sealing ring, and leading to sealing failure, the present application proposes a way to actively extrude the sealing ring to enhance the sealing performance of the sealing ring. Specifically, the pressure inside the reaction kettle is used to extrude the sealing ring, thereby effectively avoiding the sealing failure of the sealing ring caused by the high pressure environment, and ensuring the safety of the device under high pressure conditions.

[0048] A pressure relief device for non-metal part pressure test, such as Figures 1-4As shown, it comprises a connecting shell 11, a first fixing member 12 fixed in the connecting shell 11, a plurality of through holes being arranged in the first fixing member 12, a first fixing shell 13 fixed to the first fixing member 12, the first fixing member 12 and the first fixing shell 13 being slidably connected with a first sliding member 14, the first sliding member 14 being fixed on the side away from the first fixing shell 13 with a connecting frame 15, the connecting frame 15 being fixed with extrusion columns 151 consistent with the number of the through holes on the first fixing member 12, a fixed frame 16 fixed in the connecting shell 11, the fixed frame 16 being fixed with a second fixing shell 17 slidably connected with the first sliding member 14, a connecting pipe 18 fixed and communicated with the connecting shell 11, the connecting pipe 18 being fixed and communicated with the second fixing shell 17, the first fixing member 12 being located between the two sides of the connecting pipe 18, the connecting shell 11 being fixed with a third fixing shell 19 for protecting the connecting pipe 18, a limiting assembly arranged on the third fixing shell 19 for limiting the movement of the first sliding member 14, and a plugging assembly arranged in the connecting shell 11 for changing the plugging mode of all the through holes on the first fixing member 12.

[0049] In the above scheme, the parts involved in the present application can be adjusted according to actual conditions whether they need to be sprayed with a corrosion-resistant coating or replaced with a corrosion-resistant material. The connecting shell 11 is formed by welding two semicircular shells, the first fixing member 12 is located in the middle of the connecting shell 11, the plurality of through holes are distributed equidistantly in the circumferential direction on the first fixing member 12, the number and distribution are only for illustration and are not limited, and the number of the through holes can be adjusted according to actual conditions in application. The right side of the first fixing shell 13 is a sharp end for reducing the resistance of the right side of the first fixing shell 13 to the gas. One spring telescopic rod on the right side of the first fixing member 12 can be normally used in actual application, but there are two spring telescopic rods in the present application for ensuring the stability of the first sliding member 14 during movement. The two spring telescopic rods in the present application are respectively located on the upper and lower sides of the first sliding member 14, the spring telescopic rod in the present application is in a compressed state (the spring telescopic rod will not be compressed when the connecting shell 11 is not in a pressure relief state), and the right side of the first sliding member 14 is not in contact with the inner side of the first fixing shell 13 at this time, so that the left side of the first sliding member 14 is in sealing sliding cooperation with the second fixing shell 17, the gas in the connecting shell 11 enters the second fixing shell 17 through the connecting pipe 18 to exert a pushing force on the first sliding member 14 from left to right, thereby enhancing the adhesion of the parts on the first sliding member 14 to the first fixing member 12 (the right side of the connecting shell 11 is connected with a reaction kettle before the sample is tested), and the right side of the first sliding member 14 is provided with a limiting hole. Figure 4 Figure 4

[0050] Figure 3 Figure 4 Figure 6 ​​​​​As shown, the limiting assembly comprises: a fourth fixed shell 21 connected to the connecting pipe 18, the fourth fixed shell 21 is connected to the third fixed shell 19, and the first fixed part 12 is connected to a spring telescopic rod for driving the first sliding part 14 to reset; a second sliding part 22 connected to the fourth fixed shell 21, the fourth fixed shell 21 is provided with a spring connected to the second sliding part 22, the connecting shell 11, the first fixed shell 13 and the third fixed shell 19 are connected to the first limiting frame 23, the first limiting frame 23 is used for limiting the first sliding part 14, the second sliding part 22 is connected to the first limiting frame 23, and the limiting assembly further comprises: a sliding plate 24 connected to the fourth fixed shell 21, the sliding plate 24 is connected to the spring on the second sliding part 22; a rotating part 25 connected to the fourth fixed shell 21, the rotating part 25 is located on one side of the fourth fixed shell 21 and is limited to rotate with the sliding plate 24, the second sliding part 22 penetrates the rotating part 25 and is connected to the rotating part 25; a blocking part 26 connected to the second sliding part 22, the blocking part 26 penetrates the connecting shell 11 and the third fixed shell 19 and is connected to the connecting shell 11 and the third fixed shell 19, the blocking part 26 is used for blocking the connecting pipe 18, the blocking part 26 is provided with an L-shaped cavity, and the L-shaped cavity in the blocking part 26 is used for connecting the connecting pipe 18 and the connecting shell 11.

[0051] In the above scheme, the fourth fixed shell 21 is provided with an inclined surface, the lower side of the second sliding part 22 is connected to the fourth fixed shell 21 in a sealed manner, Figure 4 In the above scheme, the fourth fixed shell 21 is provided with an inclined surface, the lower side of the second sliding part 22 is connected to the fourth fixed shell 21 in a sealed manner, Figure 4 In the above scheme, the fourth fixed shell 21 is provided with an inclined surface, the lower side of the second sliding part 22 is connected to the fourth fixed shell 21 in a sealed manner,

[0052] As Figure 4 and Figure 5As shown, the blocking assembly comprises: air guide pieces 31, which are consistent in number with the through holes on the first fixing piece 12 and are respectively fixed to the adjacent through holes on the first fixing piece 12; sealing pieces 32, which are consistent in number with the extrusion columns 151 and are respectively fixed to the adjacent extrusion columns 151, the side of the air guide piece 31 facing the adjacent sealing piece 32 is provided with a limiting groove 33, the limiting groove 33 is communicated with the inside of the connecting shell 11, the sealing piece 32 is in contact with the adjacent limiting groove 33, the side of the air guide piece 31 away from the adjacent sealing piece 32 is provided with a ventilation groove 34, the ventilation groove 34 is communicated with the inside of the connecting shell 11, the air guide piece 31 is provided with spaced distribution inclined holes 35, the inclined holes 35 are used for communicating the adjacent ventilation groove 34 with the adjacent limiting groove 33, the sealing piece 32 is in blocking cooperation with the adjacent inclined hole 35, the cross section of the ventilation groove 34 is a right trapezoid, the upper base of the right trapezoid on the cross section of the ventilation groove 34 is close to the adjacent sealing piece 32, the limiting groove 33 is a circular truncated cone groove, the side of the extrusion column 151 close to the adjacent ventilation groove 34 is a circular truncated cone, the sealing piece 32 is of soft and deformable material, and the cross section of the sealing piece 32 is a trapezoid, the side of the sealing piece 32 with large diameter is larger than the side of the adjacent limiting groove 33 with large diameter, the side of the sealing piece 32 with small diameter is larger than the side of the adjacent limiting groove 33 with small diameter, the depth of the limiting groove 33 is greater than the length of the adjacent sealing piece 32, and the edge line of the cross section of the sealing piece 32 is not parallel to the edge line of the side of the limiting groove 33 on which the limiting groove 33 is located.

[0053] In the above scheme, the sealing piece 32 is silica gel, the existing sealing mode (the existing sealing mode is flat fitting type sealing or plunger type sealing) is replaced by installing the sealing piece 32 and the air guide piece 31, when the gas is sprayed out through one of the ventilation grooves 34 and the adjacent inclined hole 35 when the connecting shell 11 is depressurized, the impact force of the gas on the adjacent air guide piece 31 when the gas passes through the ventilation groove 34 is reduced, the structural strength of the air guide piece 31 is enhanced, the gas is smoothly transported to the adjacent limiting groove 33 when the gas passes through the inclined hole 35, and the gas is smoothly sprayed out, Figure 5 In the above scheme, the sealing piece 32 is silica gel, the existing sealing mode (the existing sealing mode is flat fitting type sealing or plunger type sealing) is replaced by installing the sealing piece 32 and the air guide piece 31, when the gas is sprayed out through one of the ventilation grooves 34 and the adjacent inclined hole 35 when the connecting shell 11 is depressurized, the impact force of the gas on the adjacent air guide piece 31 when the gas passes through the ventilation groove 34 is reduced, the structural strength of the air guide piece 31 is enhanced, the gas is smoothly transported to the adjacent limiting groove 33 when the gas passes through the inclined hole 35, and the gas is smoothly sprayed out, Figure 5 In the above scheme, the sealing piece 32 is silica gel, the existing sealing mode (the existing sealing mode is flat fitting type sealing or plunger type sealing) is replaced by installing the sealing piece 32 and the air guide piece 31, when the gas is sprayed out through one of the ventilation grooves 34 and the adjacent inclined hole 35 when the connecting shell 11 is depressurized, the impact force of the gas on the adjacent air guide piece 31 when the gas passes through the ventilation groove 34 is reduced, the structural strength of the air guide piece 31 is enhanced, the gas is smoothly transported to the adjacent limiting groove 33 when the gas passes through the inclined hole 35, and the gas is smoothly sprayed out,

[0054] Before testing the pressure of the non-metallic piece, the worker installs the connecting shell 11 to the pressure relief port of the reaction kettle (existing equipment, not shown in the figure), and connects the other side of the connecting shell 11 to the gas collection equipment (not shown in the figure), thereby completing the installation of the connecting shell 11.

[0055] When the installation of the connecting shell 11 is completed, the worker puts the sample into the reaction kettle, then seals the reaction kettle, and finally injects gas (the test gas medium can be: carbon dioxide, methane, hydrogen sulfide single or mixed gas) into the reaction kettle by the pressurizing equipment. The gas enters the connecting shell 11 after entering the reaction kettle, thereby increasing the pressure in the connecting shell 11. At this time, the gas in the connecting pipe 18 is transported to the second fixed shell 17, thereby increasing the pressure in the second fixed shell 17, and generating a continuous pushing force from the left side to the right side of the first sliding piece 14. At this time, the pressure in the connecting pipe 18 is not enough to drive the second sliding piece 22 to move upward (the pressure in the connecting pipe 18 is less than the extrusion force of the upper spring of the second sliding piece 22), and then the extrusion force of the spring extension rod of the first fixed piece 12 on the first sliding piece 14 and the pushing force of the gas in the connecting pipe 18 on the first sliding piece 14 further enhance the sealing between the sealing piece 32 and the adjacent limiting groove 33, thereby ensuring the sealing under high pressure conditions.

[0056] During the pressurizing process of the pressurizing equipment to the reaction kettle, the monitoring equipment monitors the pressure resistance of the sample. If the pressure threshold value inside the reaction kettle exceeds the safety value, the pressure in the connecting pipe 18 increases, thereby causing the second sliding piece 22 to move upward and extrude the upper spring (at this time, the extrusion force provided by the upper spring of the second sliding piece 22 is less than the pressure in the connecting pipe 18).

[0057] During the upward movement of the second sliding piece 22, the first limiting frame 23 and the blocking piece 26 are driven to move upward, thereby releasing the limiting of the first sliding piece 14, and the blocking piece 26 gradually blocks the connecting pipe 18. At this time, the pressure in the connecting shell 11 is greater than the pushing force of the spring extension rod of the first fixed piece 12 on the first sliding piece 14, and the blocking piece 26 has blocked the middle part of the connecting pipe 18, so that the connecting pipe 18 can only communicate with the left side of the connecting shell 11 through the L-shaped cavity on the blocking piece 26. The above is the action before the pressure relief of the connecting shell 11.

[0058] After the action in the connecting shell 11 is completed before the pressure relief, the gas in the connecting shell 11 enters all the inclined holes 35 through all the air vents 34, so that the gas enters the adjacent limiting grooves 33, and the pressure in the limiting grooves 33 increases, so that the adjacent sealing elements 32 move to the left (since the sealing element 32 is in an inwardly deformed state when it is in contact with the adjacent limiting groove 33, the sealing element 32 will gradually reset during the movement to the left), and the first sliding element 14 is driven to move leftward along the second fixed shell 17 and the first fixed shell 13 by the extrusion column 151 (the first sliding element 14 extrudes the adjacent spring telescopic rod during the movement, so that the spring telescopic rod is charged, and the gas in the left side of the connecting pipe 18 is extruded into the connecting shell 11 through the L-shaped cavity on the blocking element 26 during the movement of the first sliding element 14), and the above-mentioned parts move to the state in Figure 4 and Figure 5 , which is the pressure relief state in the connecting shell 11.

[0059] During the pressure relief of the connecting shell 11, the gas in the connecting shell 11 is sprayed through all the air vents 34 and all the inclined holes 35, and the short side of the right-angle trapezoidal line on the cross section of the air vent 34 is close to the adjacent inclined hole 35, which reduces the impact force of the gas in the air vent 34, so that the gas directly enters the adjacent inclined hole 35 from the air vent 34, and is smoothly transported to the adjacent limiting groove 33 through the inclined hole 35, so that the gas enters the right side of the connecting shell 11, thereby achieving the pressure relief of the excess gas in the connecting shell 11.

[0060] When the gas is sprayed from the limiting groove 33, the edge line of the sealing element 32 is not parallel to the edge line of the side of the limiting groove 33 on the adjacent gas guide element 31, which changes the intensity of the gas sprayed from the limiting groove 33, thereby reducing the degree of cavitation on the left side of the gas guide element 31 and the sealing element 32.

[0061] When the pressure of the gas in the connecting shell 11 decreases to a safe value, the spring in the fourth fixed shell 21 extrudes the second sliding element 22, so that the second sliding element 22 drives the blocking element 26 to move downward, and then the first sliding element 14 is driven to move rightward by the spring telescopic rod on the first fixed element 12, and the first sliding element 14 drives all the extrusion columns 151 and all the sealing elements 32 to move rightward, and during the movement of the extrusion column 151 and the adjacent sealing element 32, the inside of the adjacent limiting groove 33 continuously extrudes the adjacent sealing element 32, so that the right side of the sealing element 32 is preferentially deformed, thereby enhancing the uniformity of the deformation of the subsequent sealing element 32.

[0062] When the right side of the sealing piece 32 is in contact with the inner side of the adjacent limiting groove 33, the extrusion column 151 will extrude the left side of the adjacent sealing piece 32 during the movement, so that the sealing piece 32 is extruded and expands outward, and gradually contacts the adjacent limiting groove 33. When the sealing piece 32 is deformed to contact the adjacent limiting groove 33 and block the adjacent inclined hole 35, the right side of the connecting shell 11 is sealed. At this time, the first sliding piece 14 has been slid to the right side of the first fixed shell 13, and the center axis of the right side limiting hole of the first sliding piece 14 coincides with the center axis of the right side of the first limiting frame 23. Under the action of the adjacent spring force of the second sliding piece 22, the second sliding piece 22 drives the first limiting frame 23 to move downward. When the lower end of the first limiting frame 23 moves into the limiting hole on the right side of the first sliding piece 14, the first sliding piece 14 and its attached parts are limited.

[0063] After the first limiting frame 23 is inserted into the limiting hole of the first sliding piece 14, the second sliding piece 22 is reset to the state where the adjacent spring is not compressed, and the blocking piece 26 is slid to no longer block the middle part of the connecting pipe 18, so that the connecting pipe 18 is restored to be in communication with the connecting shell 11. When the pressure in the connecting shell 11 exceeds the support force provided by the spring of the second sliding piece 22 again, the above-mentioned pressure relief process is repeated.

[0064] When the pressure in the reaction kettle reaches the required pressure of the sample, the worker rotates the rotating piece 25 to drive the sliding plate 24 to move upward and stretch the spring, thereby reducing the support force provided by the spring and the pressure borne by the second sliding piece 22. The pressure in the connecting shell 11 can easily push open the second sliding piece 22, so that the second sliding piece 22 drives the first limiting frame 23 to release the limitation of the first sliding piece 14, thereby realizing the pressure relief of the gas in the connecting shell 11 and the reaction kettle. The pressure relief process is repeated as described above (during the pressure relief process, the monitoring device monitors the changes of the sample in the reduced pressure environment).

[0065] When the pressure in the reaction kettle is stable, all related equipment is turned off, and then the sample is taken out by the worker. When the sample needs to be tested again, the worker adjusts the extrusion force of the spring by the rotating piece 25, and then repeats the above-mentioned test steps.

[0066] Example 2: Based on example 1, as Figure 3 、 Figure 7 and Figure 8Further shown, further comprising: a second limiting frame 41, slidingly connected to the first fixing member 12, for limiting the moving distance of the first sliding member 14, the second limiting frame 41 is in limiting cooperation with the first fixing shell 13, further comprising: an adjusting assembly, arranged in the connecting shell 11, for adjusting the position of the second limiting frame 41, the adjusting assembly comprises: a second fixing member 42, fixedly connected to the fixing frame 16; a rotating member 43, rotationally connected to the second fixing member 42, the rotating member 43 is internally provided with a threaded groove, the second limiting frame 41 is fixedly connected with a fixing pin in sliding cooperation with the threaded groove in the rotating member 43, and a transmission member 44 is arranged between the second fixing member 42 and the rotating member 43.

[0067] In the above scheme, the second limiting frame 41 is L-shaped, and when the second limiting frame 41 moves to the right, the moving range of the first sliding member 14 to the left is shortened, and vice versa, when the second limiting frame 41 moves to the left, the moving range of the first sliding member 14 to the left is increased, by changing the blocking position of the second limiting frame 41 to the first sliding member 14, the moving range of the first sliding member 14 is changed, so as to change the distance between the air guide member 31 and the adjacent sealing member 32, thereby realizing the adjustment of the exhaust amount of the connecting shell 11 within a certain time, the transmission member 44 is composed of a worm and a gear, the rear side of the connecting shell 11 is fixedly connected with a rocker fixedly connected with the worm of the transmission member 44, the gear of the transmission member 44 is fixedly connected with the rotating member 43, and the transmission member 44 has a self-locking effect.

[0068] When the compression resistance test of the sample is completed, the above-mentioned pressure relief process is repeated, and the pressure in the connecting shell 11 and the reaction kettle is reduced, in this process, the worker can drive the transmission member 44 through the rocker to act, so that the transmission member 44 drives the rotating member 43 to rotate, the threaded groove in the rotating member 43 extrudes the fixing pin on the second limiting frame 41 in the process of rotating, so that the second limiting frame 41 moves to the right along the first fixing shell 13, the first sliding member 14 and its attached parts move to the right in the process of moving of the second limiting frame 41, the distance between all the sealing members 32 and the adjacent limiting grooves 33 is reduced, the flow rate of the gas in the connecting shell 11 is reduced, so that the worker can know the state of the sample in the process of slow pressure relief in the reaction kettle and the connecting shell 11, and vice versa, when rapid pressure relief is needed, the second limiting frame 41 is controlled to move to the left so as not to extrude the first sliding member 14, this operation step not only increases the diversity of sample test, but also can conveniently and quickly change the speed of pressure relief in the reaction kettle.

[0069] The above-mentioned is only an embodiment of the present application, and does not limit the patent range of the present application, any equivalent structure or equivalent process transformation by using the content of the present application, or direct or indirect application in other related technical fields, are also included in the patent protection range of the present application.

Claims

1. A pressure relief device for pressure testing non-metallic parts, characterized in that The utility model relates to a kind of fixed pipe connector, including: Connecting shell (11); First fixed part (12) is fixed in the connecting shell (11), and a plurality of through holes are provided in the first fixed part (12);First fixed shell (13) is fixed to the first fixed part (12), and the first fixed part (12) and the first fixed shell (13) are slidably connected with first sliding part (14), the side of the first sliding part (14) away from the first fixed shell (13) is fixed with connecting frame (15), the connecting frame (15) is fixed with extrusion column (151) consistent with the number of through holes on the first fixed part (12); Fixed frame (16) is fixed in the connecting shell (11), and the fixed frame (16) is fixed with second fixed shell (17) slidably matched with the first sliding part (14); Connecting pipe (18) is fixed and communicated in the connecting shell (11), and the connecting pipe (18) is fixed and communicated with the second fixed shell (17), the first fixed part (12) is located between the two sides of the connecting pipe (18), and the connecting shell (11) is fixed with third fixed shell (19) for protecting the connecting pipe (18); Limiting assembly is provided on the third fixed shell (19) for limiting the movement of the first sliding part (14); Plugging assembly is provided in the connecting shell (11) for changing the plugging mode of all through holes on the first fixed part (12). The limiting assembly includes:

2. The pressure relief device for testing a non-metallic part according to claim 1, wherein Fourth fixed shell (21) is fixed and communicated with the connecting pipe (18), and the fourth fixed shell (21) is fixed with the third fixed shell (19), and the first fixed part (12) is fixed with spring telescopic rod for driving the first sliding part (14) to reset; Second sliding part (22) is slidably connected to the fourth fixed shell (21), and the fourth fixed shell (21) is provided with spring fixed with the second sliding part (22), and the connecting shell (11), the first fixed shell (13) and the third fixed shell (19) are slidably connected with first limiting frame (23), the first limiting frame (23) is used for limiting the first sliding part (14), and the second sliding part (22) is fixed with the first limiting frame (23). The limiting assembly further includes:

3. The pressure relief device for testing a non-metallic part according to claim 2, wherein: Sliding plate (24) is slidably connected in the fourth fixed shell (21), and the sliding plate (24) is fixed with the spring on the second sliding part (22); Rotary part (25) is threadedly connected to the fourth fixed shell (21), and the side of the rotary part (25) in the fourth fixed shell (21) is limitingly rotationally matched with the sliding plate (24), and the second sliding part (22) penetrates the rotary part (25) and is slidably matched therewith; ​ A blocking piece (26) is fixed to the second sliding piece (22), penetrates through the connecting shell (11) and the third fixed shell (19) and is in sliding fit with the two, and is used for blocking the connecting pipe (18). An L-shaped cavity is arranged in the blocking piece (26) and is used for connecting the connecting pipe (18) and the connecting shell (11).

4. The pressure relief device for testing a non-metallic part according to claim 3, wherein The blocking assembly comprises: Air guide pieces (31) are consistent with the number of through holes on the first fixed piece (12) and are respectively fixed in adjacent through holes on the first fixed piece (12); Sealing pieces (32) are consistent with the number of the extrusion columns (151) and are respectively fixed in adjacent extrusion columns (151). The air guide piece (31) is provided with a limiting groove (33) on the side facing the adjacent sealing piece (32), the limiting groove (33) is in communication with the connecting shell (11), the sealing piece (32) is in contact fit with the adjacent limiting groove (33), the air guide piece (31) is provided with a ventilation groove (34) on the side away from the adjacent sealing piece (32), the ventilation groove (34) is in communication with the connecting shell (11), the air guide piece (31) is provided with a plurality of oblique holes (35) distributed at intervals, the oblique holes (35) are used for connecting the adjacent ventilation grooves (34) and the adjacent limiting grooves (33), and the sealing piece (32) is in blocking fit with the adjacent oblique hole (35).

5. A pressure relief device for testing non-metallic parts according to claim 4, characterized in that: The ventilation groove (34) is a right trapezoid in cross section, and the upper base of the right trapezoid on the cross section of the ventilation groove (34) is close to the adjacent sealing piece (32).

6. The pressure relief device of claim 4, wherein: The limiting groove (33) is a circular truncated cone groove, and the side of the extrusion column (151) close to the adjacent ventilation groove (34) is a circular truncated cone.

7. The pressure relief device of claim 4, wherein: The sealing piece (32) is made of a soft and deformable material, and the cross section of the sealing piece (32) is a trapezoid. The side with a large diameter on the sealing piece (32) is larger than the side with a large diameter on the adjacent limiting groove (33), the side with a small diameter on the sealing piece (32) is larger than the side with a small diameter on the adjacent limiting groove (33), and the depth of the limiting groove (33) is greater than the length of the adjacent sealing piece (32).

8. The pressure relief device of claim 4, wherein: The edge line of the cross section of the sealing piece (32) is not parallel to the edge line of the side of the limiting groove (33) on the adjacent air guide piece (31).

9. The pressure relief device of claim 4, further comprising Comprise: A second limiting frame (41) is in sliding connection with the first fixed piece (12) and is used for limiting the movement distance of the first sliding piece (14). The second limiting frame (41) is in limiting fit with the first fixed shell (13).

10. A pressure relief device for testing a non-metallic part according to claim 9, further characterized by Comprise: An adjusting assembly is arranged in the connecting shell (11) and is used for adjusting the position of the second limiting frame (41). The adjusting assembly comprises: A second fixed piece (42) is fixed to the fixed frame (16). A rotating member (43) is rotatably connected to the second fixing member (42), a threaded groove is arranged in the rotating member (43), the second limiting frame (41) is fixedly connected with a fixing pin which is in sliding fit with the threaded groove in the rotating member (43), and a transmission member (44) is arranged between the second fixing member (42) and the rotating member (43).

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