A piston rod sealing structure for internal mixer

Abstract

The present invention discloses a novel piston rod sealing structure for an internal mixer, including an internal mixer body, a shift fork rod and a compensation mechanism. The internal mixer body includes a transition plate and a piston rod. The compensation mechanism is fixed to the transition plate and arranged on one side of the piston rod. The shift fork rod is transversely arranged between the compensation mechanism and the piston rod. One end of the shift fork rod is detachably connected to the compensation mechanism, and the other end of the shift fork rod is used for detachably connecting to a sealing ring sleeved on the piston rod. The compensation mechanism is used to drive the shift fork rod to swing along the movement direction of the piston rod, so that the end of the shift fork rod away from the compensation mechanism presses the sealing ring driven by the piston rod to a specified position. The present invention proposes a technical solution in which the compensation mechanism drives one end of the shift fork rod to always press the sealing ring sleeved on the piston rod, so that force can be applied to the sealing ring for a long time to keep the sealing ring in a sealed state, and no manual inspection is required to seal the sealing ring.

Description

Technical Field

[0001] The invention relates to the technical field of internal mixers, and in particular to a piston rod sealing structure of an internal mixer. Background Art

[0002] The top bolts of internal mixers are now mostly hydraulic top bolts. However, since the piston rod needs to frequently reciprocate up and down, the powder inside the internal mixer will be sprayed out when it is working, or the powder will become a paste and stick to the surface of the piston rod, causing the seal to fail. Therefore, the seal quality of the piston rod of the internal mixer is crucial to the appearance of the internal mixer.

[0003] At present, the piston rod structure of the internal mixer is as follows: the piston rod moves up and down in the flange sleeve, and the flange sleeve is fixed to the transition plate by bolts. In order to play a sealing role, there is a combined sealing ring in the flange sleeve. The combined sealing ring is made of cloth-reinforced rubber, and the inner ring fits tightly with the piston rod to play a sealing role. The split-type compression sleeve presses the sealing ring. In order to ensure easy disassembly, a split structure is adopted. The upper gland is positioned and fixed by the stopper. After a period of use, the combined sealing ring will leak powder after being worn. Now, the four stud bolts are tightened manually to make the gland and the split-type compression sleeve move downward together. Due to the elasticity and compressibility of rubber, the combined sealing ring is pressed and compacted to ensure that the inner ring of the combined sealing ring fits tightly against the piston rod again, thereby ensuring re-sealing. However, this method requires manual inspection and continuous tightening of bolts to ensure its sealing effect, resulting in a large amount of manpower required for regular inspections in large-scale production, resulting in a certain waste of human resources. Summary of the invention

[0004] The main purpose of the present invention is to provide a piston rod sealing structure for an internal mixer, aiming to solve the problem that the internal mixer needs manual inspection to ensure sealing.

[0005] To achieve the above purpose, the technical solution proposed by the present invention is:

[0006] A piston rod sealing structure of an internal mixer comprises an internal mixer body, a shift fork rod and a compensation mechanism, wherein the internal mixer body comprises a transition plate and a piston rod, the compensation mechanism is fixed to the transition plate and arranged on one side of the piston rod, and the shift fork rod is transversely arranged between the compensation mechanism and the piston rod; one end of the shift fork rod is detachably connected to the compensation mechanism, and the other end of the shift fork rod is used for detachably connecting to a sealing ring sleeved on the piston rod; the compensation mechanism is used to drive the shift fork rod to swing along the movement direction of the piston rod, so that the end of the shift fork rod away from the compensation mechanism will press the sealing ring driven by the piston rod to a specified position.

[0007] Preferably, the fork rod includes a first end, a second end and a third end, the first end is arranged close to the compensation mechanism, and the first end is detachably connected to the compensation mechanism; the second end and the third end are respectively arranged close to the piston rod, and the second end and the third end are symmetrically arranged along the first end; the second end and the third end are respectively used for detachably connecting sealing rings.

[0008] Preferably, a support rod is vertically arranged between the piston rod and the compensation mechanism, one end of the support rod is detachably fixedly connected to the transition plate, and the other end of the support rod passes through the fork rod, and the fork rod is used to swing along the connection with the support rod.

[0009] Preferably, a spherical pad is provided at one end of the support rod away from the transition plate, the spherical pad is located on the side of the fork rod away from the transition plate, and the arc surface of the spherical pad faces the fork rod; the spherical pad is used to ensure the accuracy of the swing path of the fork rod through the arc surface.

[0010] Preferably, a limit plate is laterally arranged between the piston rod and the compensation mechanism, and the limit plate is located on the side of the fork rod away from the transition plate; a connecting plate is vertically arranged between the transition plate and the limit plate, one end of the connecting plate is connected to the limit plate, and the other end of the connecting plate is connected to the transition plate.

[0011] Preferably, the piston rod sealing structure of the internal mixer includes a controller and a distance measuring sensor, and the controller is electrically connected to the distance measuring sensor; the distance measuring sensor is spaced apart on the side of the limit plate facing the fork rod, and the distance measuring sensor is arranged close to the piston rod or the compensation mechanism, and the distance measuring sensor is used to detect the distance data between the fork rod and the limit plate when the fork rod swings and send it to the controller, so that the controller can judge whether the swinging distance of the fork rod is within a normal range based on the distance data.

[0012] Preferably, a warning light is provided on the side of the limit plate facing away from the fork rod, and the controller is electrically connected to the warning light. The controller is used to control the opening and closing of the warning light according to the distance data so that the warning light lights up when the fork rod swings abnormally.

[0013] Preferably, the compensation mechanism includes a base, a pressing sleeve and an adjusting rod, the base is detachably fixed to the transition plate, a mounting groove is provided on the side of the base facing away from the transition plate, and an elastic spring is vertically arranged in the mounting groove; the pressing sleeve is sleeved on the end of the base away from the transition plate, one end of the elastic spring abuts against the bottom of the mounting groove, and the other end of the elastic spring abuts against the pressing sleeve; the adjusting rod is vertically arranged, one end of the adjusting rod and the end of the fork rod away from the piston rod are detachably connected, the other end of the adjusting rod and the pressing sleeve are detachably connected, the elastic spring is used to push the adjusting rod through the pressing sleeve, so that the adjusting rod pushes the fork rod to swing and drives the end of the fork rod away from the compensation mechanism to move downward to compress the sealing ring.

[0014] Preferably, one end of the adjusting rod away from the elastic spring passes through the fork rod, and the adjusting rod and the fork rod are movably connected; the adjusting rod is connected to a limit nut, and the limit nut is located between the fork rod and the pressing sleeve; one end of the adjusting rod away from the fork rod is threadedly connected to the pressing sleeve; a limit key is provided on the side wall of the base, a notch is provided on the pressing sleeve, and the limit key is provided in the notch.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] The compensation mechanism drives one end of the shift fork rod to always press the sealing ring sleeved on the piston rod, so that force can be applied to the sealing ring for a long time to keep the sealing ring in a sealed state without manual inspection to seal the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0019] Figure 2 It is a structural schematic diagram of the fork lever;

[0020] Figure 3 This is a schematic diagram of the structure of the compensation mechanism.

[0021] Description of Figure Numbers:

[0022] 1-internal mixer body; 11-transition plate; 12-piston rod; 13-sealing ring; 14-pressure cover; 15-thrust pin;

[0023] 2-shift fork rod; 21-first end; 22-second end; 23-third end; 24-support rod; 25-spherical pad; 26-arc groove;

[0024] 3-compensation mechanism; 31-base; 32-pressing sleeve; 33-adjusting rod; 34-installation slot; 35-elastic spring; 36-limiting nut; 37-limiting key; 38-notch;

[0025] 4-limiting plate; 41-connecting plate; 42-warning light;

[0026] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] The invention provides a piston rod sealing structure for an internal mixer.

[0033] like Figures 1 to 3 The sealing structure of a piston rod 12 of an internal mixer shown in the figure includes an internal mixer body 1, a fork rod 2 and a compensation mechanism 3. The internal mixer body 1 includes a transition plate 11 and a piston rod 12. The compensation mechanism 3 is detachably fixed to the transition plate 11 and arranged on one side of the piston rod 12. The fork rod 2 is transversely arranged between the compensation mechanism 3 and the piston rod 12. One end of the fork rod 2 is detachably connected to the compensation mechanism 3, and the other end of the fork rod 2 is used for detachably connecting to a sealing ring 13 sleeved on the piston rod 12. The compensation mechanism 3 is used to drive the fork rod 2 to swing along the movement direction of the piston rod 12, so that the end of the fork rod 2 away from the compensation mechanism 3 presses the sealing ring 13 driven by the piston rod 12 to a specified position.

[0034] The compensation mechanism 3 drives one end of the fork rod 2 to always press the sealing ring 13 sleeved on the piston rod 12, so that the sealing ring 13 can be forced for a long time to keep the sealing ring 13 in a sealed state without manual inspection to seal the sealing ring 13.

[0035] The fork rod 2 includes a first end 21, a second end 22 and a third end 23. The first end 21 is arranged close to the compensation mechanism 3, and the first end 21 is detachably connected to the compensation mechanism 3; the second end 22 and the third end 23 are respectively arranged close to the piston rod 12, and the second end 22 and the third end 23 are symmetrically arranged along the first end 21; the second end 22 and the third end 23 are respectively used for detachably connecting the sealing ring 13.

[0036] Specifically, a gland 14 is disposed between the fork rod 2 and the sealing ring 13 , and the second end 22 and the third end 23 are detachably connected to the gland 14 via ejector pins 15 .

[0037] Specifically, the second end 22 and the third end 23 form a U-shaped end.

[0038] Specifically, the distance between the position where the second end 22 is away from the first end 21 and the position where the third end 23 is away from the first end 21 is equal to the diameter of the gland 14 , so that the second end 22 and the third end 23 can maximally compress the sealing ring 13 through the gland 14 .

[0039] A support rod 24 is vertically arranged between the piston rod 12 and the compensation mechanism 3 , one end of the support rod 24 is detachably fixedly connected to the transition plate 11 , and the other end of the support rod 24 passes through the fork rod 2 , which is used to swing along the connection with the support rod 24 .

[0040] Specifically, a fixing nut is provided at one end of the support rod 24 away from the transition plate 11 , so as to prevent the fork rod 2 from completely separating from the support rod 24 when swinging.

[0041] Specifically, the connection between the support rod 24 and the fork rod 2 is located in the middle of the fork rod 2 .

[0042] A spherical pad 25 is provided at one end of the support rod 24 away from the transition plate 11. The spherical pad 25 is located on the side of the fork rod 2 away from the transition plate 11, and the arc surface of the spherical pad 25 faces the fork rod 2. The spherical pad 25 is used to ensure the accuracy of the swing path of the fork rod 2 through the arc surface. The fork rod 2 and the compensation mechanism 3 act through a lever to enable the fork rod 2 to press the sealing ring 13.

[0043] Specifically, the fork lever 2 faces the side of the spherical pad 25, and the connection between the fork lever 2 and the support rod 24 is provided with an arc groove 26, which is used to accommodate the arc surface of the spherical pad 25. The arc groove 26 is used to position and match the spherical pad 25.

[0044] A limit plate 4 is disposed transversely between the piston rod 12 and the compensation mechanism 3, and the limit plate 4 is located on the side of the shift fork rod 2 away from the transition plate 11; a connecting plate 41 is disposed vertically between the transition plate 11 and the limit plate 4, one end of the connecting plate 41 is connected to the limit plate 4, and the other end of the connecting plate 41 is connected to the transition plate 11. The provision of the limit plate 4 can prevent the shift fork rod 2 from exceeding the limit swing distance when swinging, and prevent the shift fork rod 2 from being separated from the sealing ring 13 and the compensation mechanism 3.

[0045] Specifically, a flexible layer (not shown in the figure) is provided on the side of the limit plate 4 facing the fork rod 2 , and the flexible layer prevents the limit plate 4 from being in rigid contact with the fork rod 2 .

[0046] Specifically, four connecting plates 41 are vertically arranged between the limiting plate 4 and the transition plate 11 .

[0047] The piston rod sealing structure of the internal mixer includes a controller (not shown in the figure) and a distance measuring sensor (not shown in the figure), and the controller is electrically connected to the distance measuring sensor; the distance measuring sensor is arranged at intervals on the side of the limit plate 4 facing the fork rod 2, and the distance measuring sensor is arranged close to the piston rod 12 or the compensation mechanism 3. The distance measuring sensor is used to detect the distance data between the fork rod 2 and the limit plate 4 when it swings and send it to the controller, so that the controller can judge whether the swinging distance of the fork rod 2 is within the normal range according to the distance data.

[0048] Specifically, three distance measuring sensors are arranged on the side of the limit plate 4 facing the fork rod 2, wherein one distance measuring sensor is used to detect the length data between the first end 21 and the limit plate 4; the other two distance measuring sensors are used to detect the length data between the second end 22 and the limit plate 4, and the length data between the third end 23 and the limit plate 4, respectively. The controller is used to receive the length data to determine whether the fork rod 2 is deformed.

[0049] A warning light 42 is provided on the side of the limit plate 4 away from the fork rod 2, and the controller is electrically connected to the warning light 42. The controller is used to control the opening and closing of the warning light 42 according to the distance data, so that the warning light 42 lights up when the fork rod 2 swings abnormally.

[0050] Specifically, the warning light 42 is provided with a multi-color light source. When the fork rod 2 swings abnormally, the warning light 42 lights up a light source of one color (such as red), indicating that the swing is abnormal and the internal mixer body 1 needs to be inspected; when the error between the length data is greater than the warning value, the warning light 42 lights up a light source of another color (such as yellow), indicating that the fork rod 2 is deformed.

[0051] The compensation mechanism 3 includes a base 31, a pressing sleeve 32 and an adjusting rod 33. The base 31 is detachably fixed to the transition plate 11. A mounting groove 34 is provided on the side of the base 31 away from the transition plate 11, and an elastic spring 35 is vertically arranged in the mounting groove 34; the pressing sleeve 32 is sleeved on the end of the base 31 away from the transition plate 11, one end of the elastic spring 35 abuts against the bottom of the mounting groove 34, and the other end of the elastic spring 35 abuts against the pressing sleeve 32; the adjusting rod 33 is vertically arranged, one end of the adjusting rod 33 is detachably connected to the end of the fork rod 2 away from the piston rod 12, and the other end of the adjusting rod 33 is detachably connected to the pressing sleeve 32, and the elastic spring 35 is used to push the adjusting rod 33 through the pressing sleeve 32, so that the adjusting rod 33 pushes the fork rod 2 to swing and drive the end of the fork rod 2 away from the compensation mechanism 3 to move downward to press the sealing ring 13. The fork rod 2 transfers the adjustment space to the periphery of the piston rod 12. When the fork rod 2 is adjusted away using a lever through the compensation mechanism 3, the elastic force of the spring 35 is transmitted through the fork rod 2, so that the end of the fork rod 2 away from the compensation mechanism 3 presses the gland 14, keeping the sealing ring 13 in a compressed state. The sealing ring 13 is always in a compressed state, ensuring that the inner edge of the sealing ring 13 is tightly fitted to the piston rod 12, thereby always playing a sealing role.

[0052] The end of the adjusting rod 33 away from the elastic spring 35 passes through the fork rod 2, and the adjusting rod 33 and the fork rod 2 are movably connected; the adjusting rod 33 is connected to the limit nut 36, and the limit nut 36 is located between the fork rod 2 and the pressing sleeve 32; the end of the adjusting rod 33 away from the fork rod 2 is threadedly connected to the pressing sleeve 32; the side wall of the base 31 is provided with a limit key 37, and the pressing sleeve 32 is provided with a notch 38, and the limit key 37 is arranged in the notch 38. The adjusting rod 33 is movably connected to the fork rod 2 and is threadedly connected to the pressing sleeve 32, so that the adjusting rod 33 can adjust the swing distance of the fork rod 2.

[0053] The setting of the limit key 37 and the notch 38 is used to make the pressing sleeve 32 only move vertically along the base 31, so that the two can move up and down relative to each other, and the elastic force of the elastic spring 35 is adjusted by changing the distance.

[0054] The shift fork rod 2 is used to move vertically along the adjusting rod 33 to abut against the limiting nut 36 , so that the adjusting rod 33 pushes the pressing sleeve 32 and the elastic spring 35 in sequence to achieve kinetic energy compensation for the shift fork rod 2 .

[0055] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A piston rod sealing structure for an internal mixer, characterized in that: The invention comprises an internal mixer body, a shift fork rod and a compensation mechanism, wherein the internal mixer body comprises a transition plate and a piston rod, the compensation mechanism is fixed to the transition plate and arranged on one side of the piston rod, and the shift fork rod is transversely arranged between the compensation mechanism and the piston rod; one end of the shift fork rod is detachably connected to the compensation mechanism, and the other end of the shift fork rod is used for detachably connecting to a sealing ring sleeved on the piston rod; the compensation mechanism is used for driving the shift fork rod to swing along the movement direction of the piston rod, so that the end of the shift fork rod away from the compensation mechanism presses the sealing ring driven by the piston rod to a specified position; The shift fork rod comprises a first end, a second end and a third end, wherein the first end is arranged close to the compensation mechanism and the first end is detachably connected to the compensation mechanism; the second end and the third end are respectively arranged close to the piston rod, and the second end and the third end are symmetrically arranged along the first end; the second end and the third end are respectively used for detachably connecting a sealing ring; A gland is arranged between the shift fork rod and the sealing ring, and the second end and the third end are detachably connected to the gland via ejector pins.

2. The piston rod sealing structure of an internal mixer according to claim 1, characterized in that: A support rod is vertically arranged between the piston rod and the compensation mechanism, one end of the support rod is detachably fixedly connected to the transition plate, and the other end of the support rod passes through the fork rod, and the fork rod is used to swing along the connection with the support rod.

3. The piston rod sealing structure of an internal mixer according to claim 2, characterized in that: A spherical pad is provided at one end of the support rod away from the transition plate, the spherical pad is located on the side of the fork rod away from the transition plate, and the arc surface of the spherical pad faces the fork rod; the spherical pad is used to ensure the accuracy of the swing path of the fork rod through the arc surface.

4. A piston rod sealing structure for an internal mixer according to any one of claims 1 to 3, characterized in that: A limit plate is laterally arranged between the piston rod and the compensation mechanism, and the limit plate is located on the side of the fork rod away from the transition plate; a connecting plate is vertically arranged between the transition plate and the limit plate, one end of the connecting plate is connected to the limit plate, and the other end of the connecting plate is connected to the transition plate.

5. The piston rod sealing structure of an internal mixer according to claim 4, characterized in that: The piston rod sealing structure of the internal mixer includes a controller and a distance measuring sensor, and the controller is electrically connected to the distance measuring sensor; the distance measuring sensor is arranged at an interval on the side of the limit plate facing the fork rod, and the distance measuring sensor is arranged close to the piston rod or the compensation mechanism, and the distance measuring sensor is used to detect the distance data between the fork rod and the limit plate when the fork rod swings and send it to the controller, so that the controller can judge whether the swinging distance of the fork rod is within a normal range according to the distance data.

6. The piston rod sealing structure of an internal mixer according to claim 5, characterized in that: A warning light is arranged on the side of the limit plate away from the fork rod, and the controller is electrically connected to the warning light. The controller is used to control the opening and closing of the warning light according to the distance data, so that the warning light lights up when the fork rod swings abnormally.

7. A piston rod sealing structure for an internal mixer according to claim 1 or 2, characterized in that: The compensation mechanism includes a base, a pressing sleeve and an adjusting rod, the base is detachably fixed to the transition plate, a mounting groove is provided on the side of the base facing away from the transition plate, and an elastic spring is vertically arranged in the mounting groove; the pressing sleeve is sleeved on the end of the base away from the transition plate, one end of the elastic spring abuts against the bottom of the mounting groove, and the other end of the elastic spring abuts against the pressing sleeve; the adjusting rod is vertically arranged, one end of the adjusting rod and the end of the fork rod away from the piston rod are detachably connected, and the other end of the adjusting rod and the pressing sleeve are detachably connected, and the elastic spring is used to push the adjusting rod through the pressing sleeve, so that the adjusting rod pushes the fork rod to swing and drives the end of the fork rod away from the compensation mechanism to move downward to compress the sealing ring.

8. The piston rod sealing structure of an internal mixer according to claim 7, characterized in that: One end of the adjusting rod away from the elastic spring passes through the fork rod, and the adjusting rod and the fork rod are movably connected; the adjusting rod is connected to a limit nut, and the limit nut is located between the fork rod and the pressing sleeve; one end of the adjusting rod away from the fork rod is threadedly connected to the pressing sleeve; a limit key is provided on the side wall of the base, a notch is provided on the pressing sleeve, and the limit key is provided in the notch.

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