A rubber compression deformation measuring tool and measuring method for an inner blowout preventer

Abstract

The application belongs to the technical field of deformation measuring equipment, and particularly relates to an inner blowout-preventing tool rubber compression deformation measuring tool and measuring method. In view of the problem that the existing rubber compression deformation measuring tool cannot control nut loosening, the following scheme is proposed, which comprises a lower pressing plate, the upper side of the lower pressing plate is fixedly connected with a bolt rod, a limiter is arranged outside the bolt rod, an upper pressing plate is arranged outside the bolt rod, the bottom of the upper pressing plate is attached to the upper side of the bolt rod, and a circular opening is formed in the lower pressing plate and the upper pressing plate. The inner blowout-preventing tool rubber compression deformation measuring tool and measuring method can effectively fix the position of the nut installed on the bolt rod, thereby avoiding the nut rotation and loosening caused by the reaction force of the compressed rubber sample transmitted by the upper pressing plate, and effectively maintaining the compression of the rubber sample by the lower pressing plate and the upper pressing plate, thereby ensuring the compression deformation measuring effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of deformation measuring equipment, and particularly relates to a rubber compression deformation measuring tool for inner blowout prevention equipment and a measuring method. BACKGROUND

[0002] Rubber is divided into natural rubber and synthetic rubber according to raw materials. Rubber is divided into block rubber, latex, liquid rubber and powder rubber according to form. Latex is a colloidal water dispersion of rubber. Liquid rubber is an oligomer of rubber, which is generally a viscous liquid before vulcanization. Powder rubber is processed into powder to facilitate batching and processing. Rubber is divided into general type and special type according to use. Rubber is an insulator and is not easy to conduct electricity. However, if it is wet or at different temperatures, it may become a conductor. Conductivity refers to the ease of conduction of electrons in the molecules or ions of a substance.

[0003] The existing rubber compression deformation measuring tool uses bolts and nuts to keep the tool in a compressed state after the rubber sample is compressed. However, during the long compression process, the tool may be subjected to a counterforce from the compressed rubber sample, which may cause the nuts to loosen on the bolts, greatly affecting the rubber compression deformation measurement. SUMMARY

[0004] The present application discloses a rubber compression deformation measuring tool for inner blowout prevention equipment and a measuring method, which aims to solve the technical problem of the existing rubber compression deformation measuring tool in the background art.

[0005] The rubber compression deformation measuring tool for inner blowout prevention equipment comprises a lower pressing plate, a bolt rod fixedly connected to the upper side of the lower pressing plate, a restrictor arranged outside the bolt rod, an upper pressing plate arranged outside the bolt rod, the bottom of the upper pressing plate being attached to the upper side of the bolt rod, a circular opening being formed in the lower pressing plate and the upper pressing plate, a same positioning pin being inserted into the circular opening, three rubber samples being arranged between the lower pressing plate and the upper pressing plate, a clamp fixing seat being fixedly connected to the bottom of the lower pressing plate, a nut being rotatably connected to the outside of the bolt rod through external threads, the bottom of the nut being attached to the upper side of the upper pressing plate, a quick replacement module being arranged outside the restrictor, and a same positioning anti-loosening module being arranged outside the lower pressing plate and the upper pressing plate.

[0006] The positioning anti-loosening module comprises a lower clamping plate and an upper clamping plate, two symmetrical circular holes being formed in the lower clamping plate and the upper clamping plate, a same threaded rod being arranged in the same side circular hole, a ratchet wheel being arranged outside each threaded rod, the bottom of each ratchet wheel being movably connected to the upper side of the upper clamping plate, three circularly equidistantly distributed strip plates being slidably connected to the outside of the nut, and the inner wall of the ratchet wheel being rotatably connected to the outside of the same side threaded rod through external threads.

[0007] The quick replacement module comprises an annular groove, which is arranged on the upper side of the lower pressing plate, the outer part of the bolt rod, and the inner wall of the annular groove is slidably connected with the bottom of the limiter.

[0008] By arranging the lower pressing plate, the upper pressing plate, the positioning pin, the nut, the rubber sample, the bolt rod, the positioning anti-loosening module, the quick replacement module and the vice fixing seat, the device can effectively fix the position of the nut installed on the bolt rod by the positioning anti-loosening module, so as to avoid the nut from rotating and loosening due to the reaction force of the compressed rubber sample transmitted from the upper pressing plate, thereby effectively maintaining the compression of the rubber sample by the lower pressing plate and the upper pressing plate and ensuring the effect of compression deformation measurement.

[0009] In a preferred scheme, a rectangular hole is arranged on the lower clamping plate, the inner wall of the rectangular hole is slidably connected with the outer part of the vice fixing seat, a circular slot is arranged on the upper clamping plate, the bolt rod is located in the circular slot, the outer part of each of the two ratchets is slidably connected with a protection frame, the bottom of the protection frame is fixedly connected with the upper side of the upper clamping plate, and the upper side of the upper clamping plate is fixedly connected with two symmetrical U-shaped frames; an adjusting shaft is movably connected with each of the U-shaped frames, a rotating block is fixedly connected with the outer part of each of the adjusting shafts, the upper side of the upper clamping plate is fixedly connected with two symmetrical short shafts, the two short shafts are located in the same side U-shaped frame, the outer part of each of the two short shafts is movably connected with a blocking rod, and the end of each of the blocking rods away from the short shaft is clamped with the same side ratchet; the end of each of the rotating blocks away from the adjusting shaft is in contact with the outer part of the same side blocking rod, the inner wall of the side of each of the U-shaped frames away from the adjusting shaft is fixedly connected with a conical spring, the end of each of the conical springs close to the blocking rod is fixedly connected with the outer part of the same side blocking rod, and the upper side of each of the three strip plates is fixedly connected with the same control ring; a slot is arranged on the upper clamping plate, and a rotating table is movably connected in the slot; the inner wall of the rotating table is slidably connected with the outer part of the bolt rod, three circularly equidistantly distributed insertion holes are arranged on the rotating table, the inner wall of each of the insertion holes is slidably connected with the outer part of the same side strip plate, the upper side of the rotating table is fixedly connected with a spring one, and the end of the spring one away from the rotating table is fixedly connected with the bottom of the control ring; the outer part of each of the three strip plates is provided with the same outer gear ring, the bottom of the outer gear ring is fixedly connected with the upper side of the rotating table, the upper side of the upper clamping plate is fixedly connected with a thin rod, the outer part of the thin rod is fixedly connected with a torsion spring, the end of the torsion spring away from the thin rod is fixedly connected with a locking buckle, and the outer part of the locking buckle is clamped with the outer part of the outer gear ring.

[0010] By arranging the positioning anti-loosening module, the rotating posture of the nut can be controlled by the strip plate, so that the nut cannot rotate, and the threaded rod can only rotate in one direction by the blocking rod and the ratchet, so that the nut cannot move upward when the upper clamping plate presses the nut, thereby improving the fixing effect of the nut on the limiter.

[0011] In a preferred scheme, the outer part of the restrictor is provided with a ring-shaped frame, the bottom of the ring-shaped frame is fixedly connected with the upper side of the lower pressing plate, and the outer part of the restrictor is provided with four rectangular openings which are circumferentially and equidistantly distributed, the inner wall of the side of the rectangular opening away from the ring-shaped frame is provided with a slot hole, the inner wall of the slot hole is fixedly connected with a spring four, and the side of the spring four away from the restrictor is fixedly connected with a clamping block; the outer part of the four clamping blocks is slidably connected with the inner wall of the same side of the rectangular opening, the upper side of the clamping block is clamped with the inner wall of the ring-shaped frame, and the outer part of the restrictor is fixedly connected with four circumferentially and equidistantly distributed limiting rods, the outer part of the four limiting rods is slidably connected with the same ring-shaped piece, the outer part of the limiting rod is surrounded by a spring two, one end of the spring two is fixedly connected with the bottom of the ring-shaped piece, and the other end is fixedly connected with the outer part of the restrictor; the ring-shaped piece is provided with four circumferentially and equidistantly distributed rectangular grooves, the rectangular grooves are slidably connected with inclined surface adapter plates, the outer part of the inclined surface adapter plate is fixedly connected with a spring three, one end of the spring three away from the inclined surface adapter plate is fixedly connected with the outer part of the restrictor, and the end of the inclined surface adapter plate close to the rectangular opening is fixedly connected with the upper side of the same side of the clamping block.

[0012] By setting the quick replacement module, the ring-shaped piece and the inclined surface adapter plate can quickly and conveniently fix the restrictor on the lower pressing plate, which ensures the replacement speed and the stability of the restrictor installation, so that the restrictor can remain stable without shaking when bearing the pressure of the upper pressing plate.

[0013] A method for measuring the compression deformation of an inner blowout preventer rubber, using a tool as described above, comprising the following steps:

[0014] Step one, according to the size of the rubber sample required for compression deformation measurement, the restrictor is quickly installed on the lower pressing plate using the quick replacement module, the vice is fixed, the upper pressing plate is aligned with the bolt rod, and then the upper pressing plate is pressed down to make the bottom of the upper pressing plate fit with the upper side of the restrictor, and the nut is screwed on the bolt rod.

[0015] Step two, the measurement tool formed by the lower pressing plate and the upper pressing plate is removed from the vice, the positioning anti-loose module is fixed on the outer part of the lower pressing plate and the upper pressing plate, so that the nut remains in a tightened state, and after compression for 36-48 hours under standard laboratory temperature conditions, the compression is removed, the sample is in a free state, and the height of the sample is measured after 1-2 hours of recovery.

[0016] From the above, the inner blowout prevention tool rubber compression deformation measuring tool provided by the application can effectively fix the position of the nut installed on the bolt rod, thereby avoiding the nut rotation and loosening caused by the reaction force of the compressed rubber sample transmitted by the upper pressing plate, effectively maintaining the compression of the rubber sample by the upper pressing plate and the lower pressing plate, and ensuring the compression deformation measuring effect. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The overall structure schematic diagram of the inner blowout prevention tool rubber compression deformation measuring tool provided by the application is shown in the figure.

[0018] Figure 2 The cross-sectional structure schematic diagram of the inner blowout prevention tool rubber compression deformation measuring tool provided by the application is shown in the figure.

[0019] Figure 3 The positioning anti-loosening module structure schematic diagram of the inner blowout prevention tool rubber compression deformation measuring tool provided by the application is shown in the figure.

[0020] Figure 4 The U-shaped frame structure schematic diagram of the inner blowout prevention tool rubber compression deformation measuring tool provided by the application is shown in the figure.

[0021] Figure 5 The rotating table structure schematic diagram of the inner blowout prevention tool rubber compression deformation measuring tool provided by the application is shown in the figure.

[0022] Figure 6 The quick replacement module structure schematic diagram of the inner blowout prevention tool rubber compression deformation measuring tool provided by the application is shown in the figure.

[0023] Figure 7 The annular part structure schematic diagram of the inner blowout prevention tool rubber compression deformation measuring tool provided by the application is shown in the figure.

[0024] In the figure: 1, the lower pressing plate; 2, the upper pressing plate; 3, the positioning pin; 4, the nut; 5, the rubber sample; 6, the bolt rod; 7, the limiter; 8, the positioning anti-loose module; 801, the lower clamping plate; 802, the threaded rod; 803, the upper clamping plate; 804, the ratchet; 805, the protection frame; 806, the U-shaped frame; 807, the blocking rod; 808, the conical spring; 809, the adjusting shaft; 810, the rotating block; 811, the notch; 812, the rotating table; 813, the insertion hole; 814, the strip plate; 815, the control ring; 816, the spring I; 817, the outer tooth ring; 818, the torsional spring; 819, the locking buckle; 9, the quick replacement module; 901, the annular groove; 902, the ring; 903, the annular frame; 904, the limiting rod; 905, the spring II; 906, the rectangular groove; 907, the inclined surface connecting plate; 908, the spring III; 909, the rectangular port; 910, the spring IV; 911, the clamping block; 10, the bench clamp fixing seat. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all.

[0026] The rubber compression deformation measuring tool for inner blowout preventer mainly applies to the scene where the existing rubber compression deformation measuring tool cannot control the loosening of the nut.

[0027] Reference Figures 1-7 A rubber compression deformation measuring tool for inner blowout preventer, comprising a lower pressing plate 1, a bolt rod 6 connected to the upper side of the lower pressing plate 1 through a bolt, a limiter 7 arranged outside the bolt rod 6, an upper pressing plate 2 arranged outside the bolt rod 6, the bottom of the upper pressing plate 2 being attached to the upper side of the bolt rod 6, and a circular port being formed in the lower pressing plate 1 and the upper pressing plate 2, a same positioning pin 3 being inserted into the circular port, three rubber samples 5 being arranged between the lower pressing plate 1 and the upper pressing plate 2 at equal intervals, a bench clamp fixing seat 10 being connected to the bottom of the lower pressing plate 1 through a bolt, the outside of the bolt rod 6 being rotatably connected to a nut 4 through external threads, the bottom of the nut 4 being attached to the upper side of the upper pressing plate 2, the outside of the limiter 7 being provided with a quick replacement module 9, and the outside of the lower pressing plate 1 and the upper pressing plate 2 being provided with a same positioning anti-loose module 8.

[0028] The positioning anti-loosening module 8 comprises a lower clamping plate 801 and an upper clamping plate 803, both of which are provided with two symmetrical circular holes, and a same threaded rod 802 is arranged in the circular holes on the same side, the outer part of the two threaded rods 802 is provided with a ratchet wheel 804, the bottom of the ratchet wheel 804 is rotatably connected to the upper side of the upper clamping plate 803 through a bearing, and the outer part of the nut 4 is slidably connected with three circumferentially equidistant strip plates 814, the inner wall of the ratchet wheel 804 is rotatably connected with the outer part of the threaded rod 802 on the same side through external threads.

[0029] The quick replacement module 9 comprises an annular groove 901, which is arranged on the upper side of the lower pressing plate 1, the outer part of the bolt rod 6, and the bottom of the limiter 7 is slidably connected with the inner wall of the annular groove 901.

[0030] Specifically, the size of the limiter 7 is selected according to the rubber sample 5 to be used for compression deformation measurement, the limiter 7 is quickly installed on the lower pressing plate 1 by using the quick replacement module 9, the bench clamp fixing seat 10 is fixed by using the bench clamp, the upper pressing plate 2 is put into the bolt rod 6 after being aligned, the upper pressing plate 2 is pressed down, the bottom of the upper pressing plate 2 is attached to the upper side of the limiter 7, the nut 4 is screwed on the bolt rod 6, the measuring tool formed by the lower pressing plate 1 and the upper pressing plate 2 is taken off from the bench clamp, the positioning anti-loosening module 8 is fixed on the outer part of the lower pressing plate 1 and the upper pressing plate 2, so that the nut 4 is kept in a screwed state, under standard laboratory temperature or high temperature conditions, compression is carried out for a certain time, then the compression is removed under certain temperature conditions, the sample is in a free state, and the height of the sample is measured after a specified time; the device can effectively fix the position of the nut 4 installed on the bolt rod 6 by using the positioning anti-loosening module 8, so as to avoid the nut 4 from rotating and loosening due to the reaction force of the compressed rubber sample 5 transmitted by the upper pressing plate 2, thereby effectively maintaining the compression of the rubber sample 5 by the lower pressing plate 1 and the upper pressing plate 2, and ensuring the effect of compression deformation measurement.

[0031] Reference Figure 3 , Figure 4 and Figure 5In a preferred implementation, the lower clamp plate 801 is provided with a rectangular hole, the inner wall of the rectangular hole is in sliding connection with the outer part of the bench clamp fixed seat 10, the upper clamp plate 803 is provided with a circular slot, the bolt rod 6 is located in the circular slot, the outer part of each of the two ratchets 804 is in sliding connection with a protection frame 805, the bottom of the protection frame 805 and the upper side of the upper clamp plate 803 are connected by bolts, and the upper side of the upper clamp plate 803 is connected by bolts with two symmetrical U-shaped frames 806; the U-shaped frame 806 is rotatably connected with an adjusting shaft 809 through a bearing, the outer part of the adjusting shaft 809 is connected by a bolt with a rotating block 810, the upper side of the upper clamp plate 803 is connected by bolts with two symmetrical short shafts, the two short shafts are located in the same side of the U-shaped frame 806, and the outer part of the two short shafts is rotatably connected with a blocking rod 807 through a bearing, the end of the blocking rod 807 away from the short shaft is clamped with the same side of the ratchet 804; the end of the rotating block 810 away from the adjusting shaft 809 is in contact with the outer part of the same side of the blocking rod 807, the inner wall of the side of the U-shaped frame 806 away from the adjusting shaft 809 is connected by a bolt with a conical spring 808, the end of the conical spring 808 close to the blocking rod 807 is connected by a bolt with the outer part of the same side of the blocking rod 807, and the upper side of the three strip plates 814 is connected by a bolt with the same control ring 815, the upper clamp plate 803 is provided with a slot 811, and the rotating table 812 is rotatably connected in the slot 811 through a bearing; the inner wall of the rotating table 812 is in sliding connection with the outer part of the bolt rod 6, the rotating table 812 is provided with three circularly distributed insertion holes 813, the inner wall of the insertion hole 813 is in sliding connection with the outer part of the same side of the strip plate 814, the upper side of the rotating table 812 is connected by a bolt with a spring 816, and the end of the spring 816 away from the rotating table 812 is connected by a bolt with the bottom of the control ring 815; the outer part of the three strip plates 814 is provided with the same outer gear ring 817, the bottom of the outer gear ring 817 is connected by a bolt with the upper side of the rotating table 812, and the upper side of the upper clamp plate 803 is connected by a bolt with a thin rod, the outer part of the thin rod is connected by a bolt with a torsion spring 818, the end of the torsion spring 818 away from the thin rod is connected by a bolt with a locking buckle 819, and the outer part of the locking buckle 819 is clamped with the outer part of the outer gear ring 817.

[0032] Specifically, after the rubber sample 5 is in a compressed state, the lower clamp plate 801 and the upper clamp plate 803 are respectively placed at the bottom of the lower pressing plate 1 and the upper side of the nut 4, the locking buckle 819 is unlocked, the control ring 815 is pulled up and rotated against the elastic force of the spring 816, the control ring 815 drives the strip-shaped plate 814 to rotate on the rotating table 812, after the bottom of the strip-shaped plate 814 is rotated to not contact the upper side of the nut 4, the control ring 815 is loosened, the outer part of the three strip-shaped plates 814 is tightly attached to the outer part of the nut 4, the two threaded rods 802 are inserted into the lower clamp plate 801 from the bottom, the threaded rods 802 are driven to rotate from the bottom of the threaded rods 802 using a screwdriver, the threaded rods 802 are screwed into the ratchet wheel 804, with the rotation of the threaded rods 802, the threaded rods 802 drive the ratchet wheel 804 to reverse and push away the blocking rod 807 against the elastic force of the conical spring 808, so that the ratchet wheel 804 drives the upper clamp plate 803 to rise and fall on the threaded rods 802, and finally the upper clamp plate 803 is pressed on the upper side of the nut 4.

[0033] In a specific application scenario, the positioning and anti-loosening module 8 is mainly suitable for the positioning and anti-loosening link in the positioning and anti-loosening process, that is, the positioning and anti-loosening module 8 can control the rotating posture of the nut 4 using the strip-shaped plate 814, so that the nut 4 cannot rotate, the threaded rods 802 can only rotate in a single direction using the blocking rod 807 and the ratchet wheel 804, so that the upper clamp plate 803 can prevent the nut 4 from moving upward when pressing the nut 4, thereby improving the fixing effect of the nut 4 on the limiter 7.

[0034] Referring to Figure 6 and Figure 7In a preferred embodiment, the outer part of the limiter 7 is provided with a ring frame 903, the bottom of the ring frame 903 is connected to the upper side of the lower pressing plate 1 by bolts, and the outer part of the limiter 7 is provided with four rectangular openings 909 distributed equidistantly along the circumference, the inner wall of the side away from the ring frame 903 of each rectangular opening 909 is provided with a slot hole, the inner wall of the slot hole is connected with a spring four 910 by bolts, and the side away from the limiter 7 of the spring four 910 is connected with a clamping block 911 by bolts; the outer part of each of the four clamping blocks 911 is connected with the inner wall of the same side rectangular opening 909 in a sliding manner, the upper side of the clamping block 911 is clamped with the inner wall of the ring frame 903, and the outer part of the limiter 7 is connected with four limit rods 904 distributed equidistantly along the circumference by bolts, the outer part of the four limit rods 904 is connected with the same ring member 902 in a sliding manner, the outer part of the limit rod 904 is surrounded by a spring two 905, one end of the spring two 905 is connected with the bottom of the ring member 902 by bolts, and the other end is connected with the outer part of the limiter 7 by bolts; the ring member 902 is provided with four rectangular grooves 906 distributed equidistantly along the circumference, the rectangular groove 906 is connected with a beveled adapter plate 907 in a sliding manner, the outer part of the beveled adapter plate 907 is connected with a spring three 908 by bolts, one end of the spring three 908 away from the beveled adapter plate 907 is connected with the outer part of the limiter 7 by bolts, and the end of the beveled adapter plate 907 close to the rectangular opening 909 is connected with the upper side of the same side clamping block 911 by bolts.

[0035] Specifically, when different types of rubber samples 5 are compressed, the limiter 7 needs to be replaced, the ring member 902 is pressed down to overcome the elastic force of the spring two 905, the edge of the rectangular groove 906 of the ring member 902 is in contact with the slope on the beveled adapter plate 907, so as to push the beveled adapter plate 907 to drive the clamping block 911 to slide inward to overcome the elastic force of the spring four 910, so that the clamping block 911 is disengaged from the ring frame 903, and the limiter 7 is removed and a new limiter 7 is inserted.

[0036] In a specific application scenario, the quick replacement module 9 is mainly suitable for quick replacement in the process of quick replacement, that is, the ring member 902 and the beveled adapter plate 907 can quickly and conveniently fix the limiter 7 on the lower pressing plate 1, which ensures the stability of the limiter 7 while ensuring the replacement speed, so that the limiter 7 can remain stable without shaking when bearing the pressure of the upper pressing plate 2.

[0037] A method for measuring the compression deformation of rubber of an inner blowout preventer tool, using a tool as described above, comprising the following steps:

[0038] Step one, according to the required compression deformation test of rubber sample 5 to select the size of the restrictor 7, using the quick change module 9 to quickly install the restrictor 7 on the lower plate 1, using the bench clamp to fix the bench clamp fixing seat 10, aligning the upper plate 2 with the bolt rod 6 and putting it into the back, pressing the upper plate 2, making the bottom of the upper plate 2 adhere to the upper side of the restrictor 7, and tightening the nut 4 on the bolt rod 6 (when different types of rubber samples 5 are compressed, the restrictor 7 needs to be replaced, the annular piece 902 is pressed under the elastic force of the spring two 905, the edge of the rectangular groove 906 of the annular piece 902 is in contact with the inclined surface of the inclined surface adapter plate 907, so as to push the inclined surface adapter plate 907 to drive the clamping block 911 to slide inwardly against the elastic force of the spring four 910, so that the clamping block 911 is disengaged from the annular frame 903, and the restrictor 7 is taken out, and a new restrictor 7 is inserted);

[0039] Step two, remove the test tool formed by the lower plate 1 and the upper plate 2 from the bench clamp, fix the positioning anti-loose module 8 outside the lower plate 1 and the upper plate 2, so that the nut 4 is kept in a tightened state, and after compression for 36-48 hours under standard laboratory temperature conditions, remove the compression, and measure the height of the sample in a free state after 1-2 hours of recovery.

[0040] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An inner blowout preventer rubber compression set measurement tooling comprising a lower plate (1), characterized in that, The upper side of the lower pressing plate (1) is fixedly connected with a bolt rod (6), the outer side of the bolt rod (6) is provided with a limiter (7), the outer side of the bolt rod (6) is provided with an upper pressing plate (2), the bottom of the upper pressing plate (2) is attached to the upper side of the bolt rod (6), and the lower pressing plate (1) and the upper pressing plate (2) are both provided with a circular opening, the same positioning pin (3) is inserted into the circular opening, three rubber samples (5) are arranged at equal intervals between the lower pressing plate (1) and the upper pressing plate (2), the bottom of the lower pressing plate (1) is fixedly connected with a bench clamp fixing seat (10), the outer side of the bolt rod (6) is rotatably connected with a nut (4) through external threads, the bottom of the nut (4) is attached to the upper side of the upper pressing plate (2), the outer side of the limiter (7) is provided with a quick replacement module (9), and the outer sides of the lower pressing plate (1) and the upper pressing plate (2) are provided with the same positioning anti-loose module (8); The positioning anti-loose module (8) comprises a lower clamping plate (801) and an upper clamping plate (803), both the lower clamping plate (801) and the upper clamping plate (803) are provided with two symmetrical circular holes, the same side of the circular holes is provided with the same threaded rod (802), the outer sides of the two threaded rods (802) are both provided with a ratchet wheel (804), the bottom of the ratchet wheel (804) is movably connected with the upper side of the upper clamping plate (803), and the outer side of the nut (4) is slidably connected with three strip plates (814) arranged at equal intervals, and the inner wall of the ratchet wheel (804) is rotatably connected with the outer side of the same side threaded rod (802) through external threads; The quick replacement module (9) comprises an annular groove (901), the annular groove (901) is arranged on the upper side of the lower pressing plate (1), the outer side of the bolt rod (6), and the bottom of the limiter (7) is slidably connected with the inner wall of the annular groove (901); The lower clamping plate (801) is provided with a rectangular hole, the inner wall of the rectangular hole is slidably connected with the outer side of the bench clamp fixing seat (10), the upper clamping plate (803) is provided with a circular groove, the bolt rod (6) is located in the circular groove, the outer sides of the two ratchet wheels (804) are both slidably connected with a protection frame (805), the bottom of the protection frame (805) is fixedly connected with the upper side of the upper clamping plate (803), and the upper side of the upper clamping plate (803) is fixedly connected with two symmetrical U-shaped frames (806); The U-shaped frame (806) is movably connected with an adjusting shaft (809), the outer side of the adjusting shaft (809) is fixedly connected with a rotating block (810), the upper side of the upper clamping plate (803) is fixedly connected with two symmetrical short shafts, the two short shafts are located in the same side U-shaped frame (806), and the outer sides of the two short shafts are movably connected with a stop rod (807), and the end of the stop rod (807) away from the short shaft is clamped with the same side ratchet wheel (804).

2. The rubber compression set measurement fixture for an inner blowout preventer tool of claim 1, wherein, The rotating block (810) is away from the adjusting shaft (809) one end and contacts with the outside of the same side blocking rod (807), the U-shaped frame (806) is away from the adjusting shaft (809) one side inner wall and is fixedly connected with the conical spring (808), the conical spring (808) is close to the blocking rod (807) one end and is fixedly connected with the outside of the same side blocking rod (807), and the upper side of the three strip plates (814) is fixedly connected with the same control ring (815), the notch (811) is set up in the upper clamping plate (803), and the rotating table (812) is movably connected in the notch (811).

3. The rubber compression set measurement fixture for an inner blowout preventer tool of claim 2, wherein, The inner wall of the rotating table (812) is slidably connected with the outside of the bolt rod (6), three circumferentially equidistantly distributed insertion holes (813) are formed in the rotating table (812), the inner wall of the insertion hole (813) is slidably connected with the outside of the same side strip plate (814), the upper side of the rotating table (812) is fixedly connected with the spring one (816), and the bottom of the control ring (815) is fixedly connected with the end of the spring one (816) away from the rotating table (812).

4. The rubber compression set measurement fixture for an inner blowout preventer tool of claim 3, wherein, The outside of the three strip plates (814) is provided with the same external gear ring (817), the bottom of the external gear ring (817) is fixedly connected with the upper side of the rotating table (812), the upper side of the upper clamping plate (803) is fixedly connected with a thin rod, the outside of the thin rod is fixedly connected with the torsional spring (818), the end of the torsional spring (818) away from the thin rod is fixedly connected with the locking buckle (819), and the outside of the locking buckle (819) is clamped with the outside of the external gear ring (817).

5. The rubber compression set measurement fixture for an inner blowout preventer tool of claim 4, wherein, The outside of the limiter (7) is provided with the annular frame (903), the bottom of the annular frame (903) is fixedly connected with the upper side of the pressing plate (1), four circumferentially equidistantly distributed rectangular openings (909) are formed in the outside of the limiter (7), slot holes are formed in the inner wall of one side of the rectangular opening (909) away from the annular frame (903), the inner wall of the slot hole is fixedly connected with the spring four (910), and the side of the spring four (910) away from the limiter (7) is fixedly connected with the clamping block (911).

6. The rubber compression set measurement fixture for an inner blowout preventer tool of claim 5, wherein, The outside of the four clamping blocks (911) is slidably connected with the inner wall of the same side rectangular opening (909), the upper side of the clamping block (911) is clamped with the inner wall of the annular frame (903), four circumferentially equidistantly distributed limiting rods (904) are fixedly connected with the outside of the limiter (7), the outside of the four limiting rods (904) is slidably connected with the same annular part (902), the outside of the limiting rod (904) is surrounded by the spring two (905), one end of the spring two (905) is fixedly connected with the bottom of the annular part (902), the other end is fixedly connected with the outside of the limiter (7).

7. The rubber compression set measurement fixture for an inner blowout preventer tool of claim 6, wherein, Four rectangular slots (906) are evenly distributed on the ring (902), and the slanted connecting plates (907) are slidably connected in the rectangular slots (906), the outer part of the slanted connecting plates (907) is fixedly connected with the third springs (908), the end of the third springs (908) away from the slanted connecting plates (907) is fixedly connected with the outer part of the limiter (7), and the end of the slanted connecting plates (907) close to the rectangular port (909) is fixedly connected with the upper side of the clamping block (911) on the same side.

8. A method for measuring compression set of an inner blowout preventer rubber, using the inner blowout preventer rubber compression set measuring tool according to claim 7, characterized by, The method comprises the following steps: Step one, according to the rubber sample (5) required for compression deformation measurement, the size of the limiter (7) is selected, the limiter (7) is quickly installed on the lower pressing plate (1) by using the quick replacement module (9), the bench clamp is fixed by using the bench clamp fixing seat (10), the upper pressing plate (2) is aligned with the bolt rod (6) and put in, the upper pressing plate (2) is pressed down, the bottom of the upper pressing plate (2) is attached to the upper side of the limiter (7), and the nut (4) is screwed on the bolt rod (6); Step two, the measuring tool formed by the lower pressing plate (1) and the upper pressing plate (2) is taken off from the bench clamp, the positioning anti-loose module (8) is fixed on the outer part of the lower pressing plate (1) and the upper pressing plate (2), so that the nut (4) is kept in the tightened state, under the standard laboratory temperature condition, the compression is removed after 36h-48h, the sample is recovered in the free state for 1h-2h, and the height of the sample is measured.

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