Push rod type sizing pool viscosity detection device

Abstract

A push rod type viscosity detection device for a sizing pool comprises a push rod device, a stress device and an air port opening and closing device, and is compact in structure, high in automation degree, high in replaceability and reasonable in design. The detection device enables the push rod to be in a stretching or retracting state by adjusting the air inlet or unloading state of the pressure chamber; the operation time and the final loading force of the push rod are detected through the force measuring sensor at the bottom of the push rod mounting cylinder and the push rod limiting sensor and the force measuring sensor at the top of the push rod mounting cylinder, so that the viscosity of sizing liquid is detected, the device is simple in structure and reliable in performance, the viscosity of the sizing liquid can be accurately detected, the sizing process quality can be improved, and the production cost is reduced. Furthermore, the production quality of the carbon fibers is more stable.

Description

Technical Field

[0001] The utility model belongs to the technical field of carbon fiber production equipment, and specifically relates to a push rod type sizing pool viscosity detection device. Background Art

[0002] For a long time, the detection of the viscosity of the sizing liquid in the carbon fiber sizing process has always relied on the operator's experience to judge. However, the manual judgment method cannot accurately judge the concentration of the sizing liquid, and there are major drawbacks in the actual operation process. The carbon fiber sizing process has high requirements for the quality of the sizing liquid. After emulsification, the microemulsion particle size must be small, the time stability must be good, and there must be no demulsification, flocculation, agglomeration, or sinking. The sizing liquid must have good fiber opening and expansion properties, good wettability with the matrix resin, affinity and compatibility, strong interfacial bonding, and stable viscosity. Therefore, the manual judgment of the viscosity of the sizing liquid cannot meet the requirements of the carbon fiber sizing process. Utility Model Content

[0003] The purpose of the utility model is to provide a push rod type sizing tank viscosity detection device to solve the problems raised in the above background technology. The device of the utility model has a compact structure, a high degree of automation, strong interchangeability, and a reasonable design. Through the control of the controller, the device can detect the viscosity of the sizing liquid in the sizing tank, further making the quality of carbon fiber production more stable.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A push rod type sizing tank viscosity detection device, characterized in that it includes a push rod device, a force receiving device, and an air port opening and closing device;

[0006] A push rod device, the push rod device includes a push rod mounting cylinder, a push rod, an energy storage spring, and a force sensor A. The push rod, the energy storage spring, and the force sensor A are arranged inside the push rod mounting cylinder. The force sensor A is arranged on the inner side of the bottom of the push rod mounting cylinder. One end of the energy storage spring is connected to the force sensor A, and the other end is connected to the push rod. The push rod body partially extends out of the push rod mounting cylinder, and an exhaust port is opened on the upper outer wall of the push rod mounting cylinder.

[0007] The force-bearing device includes a base plate, a push plate, and a protective cover. The protective cover is arranged between the base plate and the push plate. Both ends of the protective cover are respectively connected to the base plate and the push plate. The end of the push rod extends out of the push rod mounting cylinder and is connected to the push plate through the opening on the base plate. The force-bearing device is installed in the liquid pool through the base plate.

[0008] The air port opening and closing device includes a lifting door, a limit spring, and a force sensor B. A groove is provided on the outer side of the upper part of the exhaust port of the push rod mounting cylinder. The lifting door is arranged in the groove. One end of the limit spring is connected to the inside of the groove, and the other end is connected to the lifting door. The force sensor B is arranged on the inner wall of the push rod mounting cylinder, and the upper part of the lifting door. When the lifting door is in a free state, its lower part can close the exhaust port. The lifting door is close to the force sensor B, passes through the opening on the push rod mounting cylinder, and extends inward. The extended part cooperates with the force sensor B.

[0009] In a preferred solution, a quick-connect connector is further included, and two quick-connect connectors are installed on the outer side of the bottom of the push rod mounting cylinder.

[0010] In a preferred solution, a rubber ring B is further included, and the connecting end of the push rod and the energy storage spring is equipped with a rubber ring B. The rubber ring B fits the push rod mounting cylinder, and the cavity between the end and the force sensor A forms a pressure chamber when the push rod is extended.

[0011] In a preferred solution, it also includes a rubber ring A and a cover plate. The upper end of the push rod mounting cylinder is provided with a cover plate. The rubber ring A is set between the upper end of the push rod mounting cylinder and the cover plate and is fixed by a screw D. The push rod extends through the cover plate.

[0012] In a preferred solution, a push rod limit sensor is further included, which is arranged inside the push rod mounting cylinder and close to the cover plate. The push rod limit sensor is used to detect the position of the push rod.

[0013] In a preferred solution, the contact surface of the push plate with the liquid to be tested is provided with knurling, and the knurling is used to increase the contact area with the liquid to be tested.

[0014] In a preferred solution, a U-shaped groove is provided on the inner side of the push plate, and the push rod passes through the U-shaped groove and is connected to the push plate via a screw A and a gasket.

[0015] In a preferred solution, a protective cover is further included, the other end of the protective cover is connected to the push plate by a screw B, and a protective cover is arranged on the screw B. A straight groove is arranged at one end of the protective cover, and a groove for disassembly and assembly is arranged inside.

[0016] In a preferred solution, it also includes a spring hook. The spring hook is arranged inside the groove and on the lifting door, and both ends of the limit spring are fixed on the spring hook.

[0017] In a preferred solution, it also includes a dust cover plate, which is arranged on the outside of the air port opening and closing device and fixed by screws C.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. The push rod type sizing tank viscosity detection device described in the utility model includes a push rod device, a force device, and an air port opening and closing device, which has a compact structure, a high degree of automation, strong interchangeability, and a reasonable design; the detection device adjusts the air intake or unloading state of the pressure chamber to put the push rod in an extended or retracted state; the push rod running time and the final load force are detected by the force sensor at the bottom of the push rod mounting cylinder and the push rod limit sensor and force sensor at the top of the push rod mounting cylinder, thereby detecting the viscosity of the sizing liquid. The device has a simple structure and reliable performance, and can detect the viscosity of the sizing liquid more accurately, thereby improving the quality of the sizing process and further making the quality of carbon fiber production more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the push rod type sizing tank viscosity detection device in the utility model in the installation state;

[0021] Figure 2 This is a schematic structural diagram of the push rod type sizing tank viscosity detection device of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the force-bearing device of the utility model after removing the protective cover;

[0023] Figure 4 This is a schematic diagram of the structure of the push rod device of the utility model;

[0024] Figure 5 It is a partial enlarged view of the air port opening and closing device of the utility model;

[0025] Figure 6 This is an enlarged view of the internal structure of the gas port opening and closing device of the utility model after the limit spring is removed;

[0026] Figure 7 This is a schematic diagram of the protective cover structure of the utility model.

[0027] In the figure:

[0028] A. Push rod device; B. Force bearing device; C. Air port opening and closing device; D. Exhaust port; E. Spring hook;

[0029] 1. Liquid pool; 2. Bottom plate; 3. Push plate; 4. Gasket; 5. Screw A; 6. Screw B; 7. Protective cover; 8. Protective cover; 9. Push rod mounting cylinder; 10. Push rod; 11. Rubber ring A; 12. Rubber ring B; 13. Cover plate; 14. Quick connector; 15. Energy storage spring; 16. Lifting door; 17. Dust cover; 18. Screw C; 19. Limit spring; 20. Force sensor A; 21. Push rod limit sensor; 22. Force sensor B; 23. Screw D. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] like Figure 1-7 As shown:

[0032] Embodiment 1:

[0033] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0034] A push rod type sizing tank viscosity detection device, characterized in that it includes a push rod device A, a force receiving device B, and an air port opening and closing device C;

[0035] A push rod device A comprises a push rod mounting cylinder 9, a push rod 10, an energy storage spring 15 and a force sensor A20. The push rod 10, the energy storage spring 15 and the force sensor A20 are arranged inside the push rod mounting cylinder 9. The force sensor A20 is arranged on the inner side of the bottom of the push rod mounting cylinder 9. One end of the energy storage spring 15 is connected to the force sensor A20, and the other end is connected to the push rod 10. The main body of the push rod 10 extends out of the push rod mounting cylinder 9, and an exhaust port D is opened on the upper outer wall of the push rod mounting cylinder 9.

[0036] The force-bearing device B includes a base plate 2, a push plate 3, and a protective cover 7. The protective cover 7 is arranged between the base plate 2 and the push plate 3. The two ends of the protective cover 7 are respectively connected to the base plate 2 and the push plate 3. The push rod 10 extends out of the end of the push rod mounting cylinder 9, passes through the opening on the base plate 2 and is connected to the push plate 3. The force-bearing device B is installed in the liquid pool 1 through the base plate 2.

[0037] The air port opening and closing device C comprises a lifting door 16, a limit spring 19, and a force sensor B22. A groove is provided on the upper outer side of the exhaust port D of the push rod mounting cylinder 9. The lifting door 16 is arranged in the groove. One end of the limit spring 19 is connected to the inside of the groove, and the other end is connected to the lifting door 16. The force sensor B22 is arranged on the inner wall of the push rod mounting cylinder 9, above the lifting door 16. When the lifting door 16 is in a free state, its lower part can close the exhaust port D. The lifting door 16 is close to the force sensor B22, passes through the opening on the push rod mounting cylinder 9, and extends inward. The extended part cooperates with the force sensor B22.

[0038] Embodiment 2:

[0039] A push rod type sizing tank viscosity detection device, characterized in that it includes a push rod device A, a force receiving device B, and an air port opening and closing device C;

[0040] A push rod device A, the push rod device A comprises a push rod mounting cylinder 9, a push rod 10, an energy storage spring 15, and a force sensor A20. The push rod 10, the energy storage spring 15, and the force sensor A20 are arranged inside the push rod mounting cylinder 9, and the force sensor A20 is arranged on the inner side of the bottom of the push rod mounting cylinder 9. One end of the energy storage spring 15 is connected to the force sensor A20, and the other end is connected to the push rod 10. The main body of the push rod 10 extends out of the push rod mounting cylinder 9, and an exhaust port D is opened on the upper outer wall of the push rod mounting cylinder 9. A quick-connect connector 14 is also included, and two quick-connect connectors 14 are installed on the outer side of the bottom of the push rod mounting cylinder 9. A rubber ring B12 is also included, and a rubber ring B12 is installed at the connecting end of the push rod 10 and the energy storage spring 15. The rubber ring B12 fits with the push rod mounting cylinder 9, and the chamber between this end and the force sensor A20 forms a pressure chamber when the push rod 10 is extended. It also includes a rubber ring A11 and a cover plate 13. The upper end of the push rod mounting cylinder 9 is provided with a cover plate 13. The rubber ring A11 is provided between the upper end of the push rod mounting cylinder 9 and the cover plate 13 and is fixed by a screw D23. The push rod 10 extends through the cover plate 13. It also includes a push rod limit sensor 21. The push rod limit sensor 21 is provided inside the push rod mounting cylinder 9 and is close to the cover plate 13. The push rod limit sensor 21 is used to detect the position of the push rod 10.

[0041] The force-bearing device B includes a base plate 2, a push plate 3, and a protective cover 7. The protective cover 7 is arranged between the base plate 2 and the push plate 3. The two ends of the protective cover 7 are respectively connected to the base plate 2 and the push plate 3. The push rod 10 extends out of the end of the push rod mounting cylinder 9, passes through the opening on the base plate 2 and is connected to the push plate 3. The force-bearing device B is installed in the liquid pool 1 through the base plate 2.

[0042] The air port opening and closing device C comprises a lifting door 16, a limit spring 19, and a force sensor B22. A groove is provided on the upper outer side of the exhaust port D of the push rod mounting cylinder 9. The lifting door 16 is arranged in the groove. One end of the limit spring 19 is connected to the inside of the groove, and the other end is connected to the lifting door 16. The force sensor B22 is arranged on the inner wall of the push rod mounting cylinder 9, above the lifting door 16. When the lifting door 16 is in a free state, its lower part can close the exhaust port D. The lifting door 16 is close to the force sensor B22, passes through the opening on the push rod mounting cylinder 9, and extends inward. The extended part cooperates with the force sensor B22.

[0043] Embodiment 3:

[0044] A push rod type sizing tank viscosity detection device, characterized in that it includes a push rod device A, a force receiving device B, and an air port opening and closing device C;

[0045] A push rod device A comprises a push rod mounting cylinder 9, a push rod 10, an energy storage spring 15 and a force sensor A20. The push rod 10, the energy storage spring 15 and the force sensor A20 are arranged inside the push rod mounting cylinder 9. The force sensor A20 is arranged on the inner side of the bottom of the push rod mounting cylinder 9. One end of the energy storage spring 15 is connected to the force sensor A20, and the other end is connected to the push rod 10. The main body of the push rod 10 extends out of the push rod mounting cylinder 9, and an exhaust port D is opened on the upper outer wall of the push rod mounting cylinder 9.

[0046] The force-bearing device B includes a base plate 2, a push plate 3, and a protective cover 7. The protective cover 7 is arranged between the base plate 2 and the push plate 3. The two ends of the protective cover 7 are respectively connected to the base plate 2 and the push plate 3. The push rod 10 extends out of the end of the push rod mounting cylinder 9 and passes through the opening on the base plate 2 to connect with the push plate 3. The force-bearing device B is installed in the liquid pool 1 through the base plate 2. The contact surface of the push plate 3 with the liquid to be tested is provided with knurling, and the knurling is used to increase the contact area with the liquid to be tested. A U-shaped groove is provided on the inner side of the push plate 3, and the push rod 10 passes through the U-shaped groove and is connected to the push plate 3 by screws A5 and gaskets 4. In a preferred embodiment, it also includes a protective cover 8. The other end of the protective cover 7 is connected to the push plate 3 by screws B6, and the protective cover 8 is arranged on the screws B6. One end of the protective cover 8 is provided with a straight groove, and a groove for disassembly and assembly is provided inside.

[0047] The air port opening and closing device C comprises a lifting door 16, a limit spring 19, and a force sensor B22. A groove is provided on the upper outer side of the exhaust port D of the push rod mounting cylinder 9. The lifting door 16 is arranged in the groove. One end of the limit spring 19 is connected to the inside of the groove, and the other end is connected to the lifting door 16. The force sensor B22 is arranged on the inner wall of the push rod mounting cylinder 9, above the lifting door 16. When the lifting door 16 is in a free state, its lower part can close the exhaust port D. The lifting door 16 is close to the force sensor B22, passes through the opening on the push rod mounting cylinder 9, and extends inward. The extended part cooperates with the force sensor B22.

[0048] Embodiment 4:

[0049] A push rod type sizing tank viscosity detection device, characterized in that it includes a push rod device A, a force receiving device B, and an air port opening and closing device C;

[0050] A push rod device A comprises a push rod mounting cylinder 9, a push rod 10, an energy storage spring 15 and a force sensor A20. The push rod 10, the energy storage spring 15 and the force sensor A20 are arranged inside the push rod mounting cylinder 9. The force sensor A20 is arranged on the inner side of the bottom of the push rod mounting cylinder 9. One end of the energy storage spring 15 is connected to the force sensor A20, and the other end is connected to the push rod 10. The main body of the push rod 10 extends out of the push rod mounting cylinder 9, and an exhaust port D is opened on the upper outer wall of the push rod mounting cylinder 9.

[0051] The force-bearing device B includes a base plate 2, a push plate 3, and a protective cover 7. The protective cover 7 is arranged between the base plate 2 and the push plate 3. The two ends of the protective cover 7 are respectively connected to the base plate 2 and the push plate 3. The push rod 10 extends out of the end of the push rod mounting cylinder 9, passes through the opening on the base plate 2 and is connected to the push plate 3. The force-bearing device B is installed in the liquid pool 1 through the base plate 2.

[0052] The air port opening and closing device C includes a lifting door 16, a limit spring 19, and a force sensor B22. A groove is provided on the upper outer side of the exhaust port D of the push rod mounting cylinder 9. The lifting door 16 is arranged in the groove. One end of the limit spring 19 is connected to the inside of the groove, and the other end is connected to the lifting door 16. The force sensor B22 is arranged on the inner wall of the push rod mounting cylinder 9, and the upper part of the lifting door 16. When the lifting door 16 is in a free state, the lower part thereof can close the exhaust port D. The lifting door 16 is close to the force sensor B22, passes through the opening on the push rod mounting cylinder 9, and extends inward. The extended part cooperates with the force sensor B22. It also includes a spring hook E. The spring hook E is arranged inside the groove and on the lifting door 16. Both ends of the limit spring 19 are fixed on the spring hook E. It also includes a dust cover plate 17. The dust cover plate 17 is arranged on the outer side of the air port opening and closing device C and fixed by screws C18.

[0053] The above implementation modes are only several typical combinations of the present solution. The implementation modes described in the implementation modes can be combined arbitrarily without departing from the protection scope of the present solution.

[0054] Working method:

[0055] 1. The push rod type sizing tank viscosity detection device is arranged in the liquid pool 1 to be detected;

[0056] 2 Under the action of the air inlet end of the quick-connect connector 14, a stable pressure P enters the pressure chamber and transmits the pressure to the push rod 10, and the push rod 10 extends under the action of the thrust F = P·S;

[0057] 3 The push rod 10 drives the push plate 3 of the force-bearing device B to run in the liquid pool 1;

[0058] 4 Under the same external environment, the viscosity in the liquid pool 1 increases with the increase of concentration, and the resistance encountered by the force-bearing device when running in the liquid will also show corresponding changes. In order to highlight the influence of viscosity on it, knurling is provided on the push plate 3 to increase the contact area;

[0059] As the push rod 10 is continuously extended, it drives the lift door 16 to move in the direction until the exhaust port D is fully opened, triggering the force sensor B22 and the push rod limit sensor 21; after the pressure chamber is completely unloaded, the push rod 10 moves back to the initial position under the action of the energy storage spring 15.

[0060] The detection principle of this embodiment will be explained below from the operation situation during actual use:

[0061] Specifically, the device is installed inside the liquid pool 1 through the bottom plate 2, and the quick-connect connector 14 at the bottom of the push rod mounting cylinder 9 is connected to the two-position three-way solenoid valve through the air pipe. The air inlet of the two-position three-way solenoid valve is connected to a quantitative valve for adjusting the gas flow entering the pressure chamber. In order to obtain a more stable gas source, the gas is released through the gas storage tank;

[0062] The push rod 10 is subjected to a thrust of F=P·S under the action of the constant pressure gas source in the pressure chamber, so that the push rod 10 extends and drives the force-bearing device B to move in the liquid pool 1. Due to the characteristic that the viscosity of the liquid increases with the increase of the liquid concentration, the force-bearing device B runs in liquids of different viscosity concentrations with a constant thrust. Since the viscosity resistance increases with the increase of viscosity, the time required for it to run to the same distance increases with the increase of viscosity; in order to amplify the effect of viscosity on the device, a knurled pattern is provided on the surface of the push plate 3 running in the liquid pool 1 to increase the contact area;

[0063] After the push rod 10 is extended, the head drives the push plate 3 to run in the liquid pool 1, and the protective cover 7 gradually extends. After the push rod 10 is extended, the bottom force block with the rubber ring B12 moves in the push rod installation cylinder 9. When it runs to the air port opening and closing device C, it will drive the lifting door 16 to move together, and the force sensor 22 detects the thrust transmitted by the push rod 10. After the lifting door 16 moves, the exhaust port D slowly opens until the push rod 10 extends to the limit point. The push rod limit sensor 21 detects that the push rod 10 has reached the specified position, records the running time of the push rod 10, and feeds back the position information to the control system. The two-position three-way solenoid valve is adjusted to the deflation position, and the gas in the pressure chamber is quickly unloaded from the exhaust port D and the quick-connect connector 14. The push rod 10 is rapidly retracted to its initial position in the push rod mounting cylinder 9 under the action of the energy storage spring 15. The energy storage spring 15 stores rated energy when the push rod 10 is extended to its limit position. When the push rod 10 is retracted to its initial position in the push rod mounting cylinder 9, the force-bearing device B will lose a certain amount of energy due to the influence of the viscosity of the liquid in the liquid pool 1. The greater the viscosity of the liquid in the liquid pool 1, the greater the energy lost. The viscosity of the liquid in the liquid pool 1 can be judged by the thrust borne by the bottom force sensor 20 when the push rod 10 is retracted to its initial position in the push rod mounting cylinder 9.

[0064] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A push rod type sizing tank viscosity detection device, characterized in that: It includes a push rod device (A), a force receiving device (B), and an air port opening and closing device (C); A push rod device (A), the push rod device (A) comprising a push rod mounting cylinder (9), a push rod (10), an energy storage spring (15), and a force sensor A (20), wherein the push rod (10), the energy storage spring (15), and the force sensor A (20) are arranged inside the push rod mounting cylinder (9), the force sensor A (20) is arranged on the inner side of the bottom of the push rod mounting cylinder (9), one end of the energy storage spring (15) is connected to the force sensor A (20), and the other end is connected to the push rod (10), the main body of the push rod (10) extends out of the push rod mounting cylinder (9), and an exhaust port (D) is opened on the upper outer wall of the push rod mounting cylinder (9); A force-bearing device (B), the force-bearing device (B) comprises a base plate (2), a push plate (3), and a protective cover (7), wherein the protective cover (7) is arranged between the base plate (2) and the push plate (3), and the two ends of the protective cover (7) are respectively connected to the base plate (2) and the push plate (3), and the end of the push rod (10) extends out of the push rod mounting cylinder (9), passes through the opening on the base plate (2), and is connected to the push plate (3); The air port opening and closing device (C) comprises a lifting door (16), a limit spring (19), and a force sensor B (22). A groove is provided on the outer side of the upper part of the exhaust port (D) of the push rod mounting cylinder (9), and the lifting door (16) is arranged in the groove. One end of the limit spring (19) is connected to the inside of the groove, and the other end is connected to the lifting door (16). The force sensor B (22) is arranged on the inner wall of the push rod mounting cylinder (9) and the upper part of the lifting door (16).

2. According to claim 1, a push rod type sizing tank viscosity detection device is characterized in that: It also comprises a quick-insertion connector (14), and two quick-insertion connectors (14) are installed on the outer side of the bottom of the push rod mounting cylinder (9).

3. A push rod type sizing tank viscosity detection device according to claim 1, characterized in that: It also comprises a rubber ring B (12), and the connecting end of the push rod (10) and the energy storage spring (15) is provided with the rubber ring B (12).

4. A push rod type sizing tank viscosity detection device according to claim 1, characterized in that: It also includes a rubber ring A (11) and a cover plate (13). The upper end of the push rod mounting cylinder (9) is provided with the cover plate (13). The rubber ring A (11) is arranged between the upper end of the push rod mounting cylinder (9) and the cover plate (13). The push rod (10) extends out through the cover plate (13).

5. A push rod type sizing tank viscosity detection device according to claim 1, characterized in that: It also includes a push rod limit sensor (21), which is arranged on the inner side of the push rod mounting cylinder (9) and is close to the cover plate (13).

6. A push rod type sizing tank viscosity detection device according to claim 1, characterized in that: The push plate (3) is provided with knurling on the contact surface with the liquid to be tested.

7. A push rod type sizing tank viscosity detection device according to claim 1, characterized in that: A U-shaped groove is provided on the inner side of the push plate (3), and the push rod (10) is connected to the push plate (3) via the U-shaped groove.

8. A push rod type sizing tank viscosity detection device according to claim 1, characterized in that: It also includes a protective cover (8), the other end of the protective cover (7) is connected to the push plate (3) through a screw B (6), and the protective cover (8) is arranged on the screw B (6).

9. A push rod type sizing tank viscosity detection device according to claim 1, characterized in that: It also includes a spring hook (E), the spring hook (E) is arranged inside the groove and on the lifting door (16), and the two ends of the limit spring (19) are fixed on the spring hook (E).

10. A push rod type sizing tank viscosity detection device according to claim 1, characterized in that: It also includes a dust cover plate (17), which is arranged on the outside of the air port opening and closing device (C).

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