Pendulum level gage

Abstract

The utility model discloses a pendulum level gage, which belongs to the technical field of stirrers and comprises a shell, a pendulum component and a travel switch. The pendulum assembly middle shaft comprises a first connecting part and a second connecting part, the first connecting part is arranged in the shell, the second connecting part is arranged outside the shell, the cam shaft sleeve is connected with the first connecting part, and the swing arm is connected with the second connecting part so that the swing arm can swing between the first position and the second position. The swing direction of the swing arm is tangent to the rotation direction of materials in the mixer charging barrel, and the swing arm is in a vertical state at the first position; a pulley is installed on a trigger button of the travel switch and makes contact with the surface of the cam shaft sleeve, when the swing arm makes contact with materials and is pushed by the swing arm to swing to the second position, the surface protrusion arranged on the cam shaft sleeve pushes the pulley, and therefore the trigger button is pressed down to trigger the travel switch. The pendulum assembly in the device can automatically complete resetting, the position of the swing arm does not need to be manually adjusted, and resetting is rapid and efficient.

Description

Technical Field

[0001] The utility model belongs to the technical field of mixers, and in particular relates to a material level meter for a mixer. Background Art

[0002] A level meter refers to an instrument that detects the change in the height of solid materials in a container in real time. The level meter is also called a level transmitter, a level controller, a level meter, a material level meter, etc. At present, some level meters on the market are equipped with a swing arm that can perform pendulum-like motion, and detect materials through the swinging action of the pendulum assembly. However, when detecting materials, this type of level meter establishes an electromagnetic field and has sensors at the left and right ends of the swing path of the swing arm. The magnetic armature is swung toward one side of the sensor under the action of the magnetic force in the electromagnetic field, and the pendulum assembly composed of the swing arm and the detection plate swings accordingly. When the magnetic armature approaches the proximity sensor on one side, the sensor transmits a signal to generate a reverse magnetic field. The magnetic armature swings toward the other side of the sensor under the action of the reverse magnetic field, so that the pendulum assembly swings left and right periodically. In this way, the pendulum assembly will continue to swing back and forth even if it does not touch the material until it contacts the material, and it cannot be reset automatically, and the parts wear quickly. At the same time, the force generated when encountering fast-flowing materials is easy to damage the pendulum assembly, affecting the life of the parts. Utility Model Content

[0003] In view of the deficiencies existing in the related art, the utility model provides a pendulum type material level meter to solve the problem that the current pendulum type material level meter cannot be automatically reset.

[0004] The utility model provides a pendulum type material level meter, comprising:

[0005] case;

[0006] A pendulum assembly, the pendulum assembly comprises a shaft, a swing arm and a cam sleeve, the shaft comprises a first connection portion and a second connection portion, the first connection portion is arranged in the housing, the second connection portion is arranged outside the housing, the cam sleeve is mounted on the first connection portion, the swing arm is connected to the second connection portion, so that the swing arm swings between a first position and a second position, and the swing direction is tangent to the rotation direction of the material in the mixer barrel, and the swing arm is in a vertical state when in the first position;

[0007] The travel switch is arranged in the housing. A pulley is installed on the trigger button of the travel switch. The pulley contacts the surface of the cam sleeve. When the swing arm contacts the material and swings to the second position under its push, the surface protrusion set on the cam sleeve pushes the pulley, thereby pressing the trigger button to trigger the travel switch.

[0008] In the present technical solution, a pendulum assembly and a travel switch are provided in the shell. When the mixer starts to feed and stir, the material pushes the swing arm to swing from the first position in a vertical state to the second position. The swing direction of the swing arm is tangent to the rotation direction of the material, thereby driving the cam sleeve to rotate and pressing the trigger button through the surface protrusion set on the cam sleeve to trigger the travel switch, thereby completing the material level measurement work. When the material level in the mixer drops and the material does not contact the swing arm, there is no external force acting on the swing arm. At this time, the swing arm relies on its own gravity to return to the first position from the second position, and the cam sleeve rotates in the opposite direction with the swing arm. The surface protrusion disconnects from the trigger button, and the swing arm returns to the first position, thereby completing the reset. The reset can be automatically completed without manually adjusting the position of the swing arm. The reset is fast and efficient. In addition, the level meter will not operate when the material does not contact the swing arm, thereby reducing the overall wear of the level meter, increasing the service life of the level meter, and also avoiding the mutual force generated by the swing arm when encountering fast-flowing materials if it is always in a swinging state to damage the pendulum assembly and the like.

[0009] In some of the embodiments, the housing includes an upper housing and a lower housing, both the upper housing and the lower housing have openings, and the opening of the upper housing is connected to the opening of the lower housing.

[0010] In the present technical solution, the shell includes an upper shell and a lower shell. To repair and replace the internal accessories, it is only necessary to separate the upper shell from the lower shell. The operation is simple and can effectively improve the efficiency of repair and replacement.

[0011] In some embodiments, the upper housing is sealed and connected to the lower housing.

[0012] In the present technical solution, the upper shell and the lower shell are sealed and connected, which can prevent materials from splashing into the shell, thereby causing hysteresis and jamming of rotating parts such as shafts and bearings, thereby affecting the service life of the device.

[0013] In some embodiments, a bearing is disposed outside the first connecting portion, and two bearings are provided, and the two bearings are respectively disposed at two ends of the camshaft sleeve.

[0014] In the present technical solution, the first connecting part rotates in the bearing to reduce friction resistance and make the rotation smoother. At the same time, the rotation in the bearing can also increase the stability of the rotation of the first connecting part. The camshaft sleeve is arranged between the two bearings to protect and clamp the camshaft sleeve, avoiding excessive wear of the camshaft sleeve due to contact with other components, and also enhancing the stability of the connection between the camshaft sleeve and the first connecting part.

[0015] In some embodiments, a reset assembly is also included, which includes a hole bolt and a tension spring. The hole bolt is arranged in the shell, and the tension spring connects the hole bolt and the cam sleeve. When the swing arm moves from the first position to the second position, the cam sleeve rotates and stretches the tension spring to generate an elastic force to drive the swing arm back to the first position.

[0016] In the technical solution, through the reset component connected to the camshaft sleeve, the elastic force generated by the extension of the tension spring after the camshaft sleeve rotates can quickly drive the camshaft sleeve to rotate in the opposite direction, thereby achieving rapid reset.

[0017] In some embodiments, a fixing seat is provided in the shell, and a hole bolt is threadedly connected with an adjusting nut after passing through the fixing seat. The adjusting nut is attached to the fixing seat to make the hole bolt move axially and push and pull the tension spring when the adjusting nut is rotated.

[0018] In the technical solution, the bolt with a hole can be moved by adjusting the nut to adjust the tension spring. When the swing arm is still offset to the second position after being reset, the bolt with a hole is moved upward, and the tension spring applies a pulling force to the camshaft sleeve to rotate it, so that the swing arm swings to the first position until it is reset. When the swing arm is reset and offsets away from the second position, the bolt with a hole is moved downward. At this time, the tension spring applies a thrust to the camshaft sleeve to rotate it, so that the swing arm is always kept in a vertical state in the first position, thereby ensuring the accuracy of the level meter.

[0019] In some of the embodiments, an adjustment hole is provided on the side wall of the shell, the adjustment hole is a long waist hole, a positioning adjustment member that can move up and down is provided in the adjustment hole, and the positioning adjustment member is connected to the fixing seat.

[0020] In the technical solution, the fixing seat is driven to adjust the upper and lower positions by a positioning adjustment member that can move up and down in the adjustment hole, so that the position of the hole bolt installed on the fixing seat can be directly adjusted to realize the control of the tightness of the tension spring. There is no need to open the shell and then twist the adjustment nut for control, thereby improving the use efficiency.

[0021] In some embodiments, an end cover is installed at the end of the first connecting portion, one side of the end cover is attached to the inner wall of the shell, and the other side of the end cover is attached to the bearing surface, so that the shell and the bearing limit the axial position of the shaft by clamping the end cover.

[0022] In the technical solution, the first connecting part is fixed by the end cover clamped by the housing and the bearing, thereby improving the axial stability of the shaft during rotation and preventing the first connecting part from detaching from the housing.

[0023] In some embodiments, a first limit plate is provided in the shell. When the swing arm is in the first position, the tension spring is in a non-elastic deformation state, and the surface protrusion is attached to the first limit plate to prevent the swing arm from swinging away from the second position.

[0024] In the present technical solution, a first limit plate is provided so that when the surface protrusion contacts the first limit plate, the tension spring is in a non-elastic deformation state, so that the swing arm can be in a vertical initial state. At the same time, it can also prevent the tension spring from contracting too much when the swing arm is reset, causing the swing arm to swing away from the second position, resulting in an inability to reset to the vertical state.

[0025] In some embodiments, a second limit plate is provided in the shell, a limit block is provided on the camshaft sleeve, the limit block is connected to the tension spring, when the swing arm swings to the second position, the tension spring is stretched by the limit block, and the limit block is attached to the second limit plate to prevent the swing arm from swinging away from the first position.

[0026] In the present technical solution, by setting a second limit plate to limit the maximum swing amplitude of the swing arm, it is possible to avoid damage caused by excessive stretching of the tension spring. At the same time, limiting the swing amplitude of the swing arm can also avoid excessive addition of materials affecting stirring.

[0027] Based on the above technical solution, a pendulum assembly and a reset assembly are provided in the shell. Before measuring the material level, the tension of the tension spring is adjusted through the fixed seat to keep the swing arm in a vertical state. When the mixer starts to feed and stir, the material pushes the swing arm to swing from the first position to the second position, and the cam sleeve rotates and triggers the travel switch in contact with it through the surface protrusion set on the cam sleeve, thereby completing the material level measurement. When the material level in the mixer drops and the material does not contact the swing arm, there is no external force acting on the swing arm. At this time, the tension spring pulls the cam sleeve by the elastic force generated by the previous rotation of the cam sleeve, causing the cam sleeve to rotate in the opposite direction, and the surface protrusion The contact with the trigger button is disconnected, and the swing arm returns to the first position to complete the reset. At the same time, a first limit plate is provided in the shell to prevent the tension spring from contracting too much during reset so that the swing arm cannot be reset to the vertical state. The reset can be completed automatically without manually adjusting the position of the swing arm. At the same time, the reset assembly and the limit plate can speed up the reset speed and accuracy of the swing arm, which is efficient and convenient. In addition, the level meter will not operate when the material does not contact the swing arm, which reduces the overall wear of the level meter, increases the service life of the level meter, and prevents the mutual force generated by the swing arm in the swinging state when encountering fast-flowing materials, which may damage the pendulum assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0029] Figure 1 It is a front cross-sectional view of an embodiment of the pendulum type material level meter of the utility model.

[0030] Figure 2 It is a left side cross-sectional view of an embodiment of the pendulum type material level meter of the utility model.

[0031] Figure 3 It is a right side cross-sectional view of an embodiment of the pendulum type material level meter of the utility model.

[0032] Figure 4It is an overall schematic diagram of an embodiment of the pendulum type material level meter of the utility model.

[0033] Figure numerals: 1. shell; 101. upper shell; 102. lower shell; 2. pendulum assembly; 201. shaft; 2011. first connecting part; 2012. second connecting part; 202. swing arm; 203. camshaft sleeve; 2031. surface protrusion; 3. travel switch; 301. trigger button; 302. pulley; 4. bearing; 5. reset assembly; 501. bolt with hole; 502. tension spring; 6. fixing seat; 7. adjusting nut; 8. adjusting hole; 801. positioning adjustment member; 9. end cover; 10. first limit plate; 11. second limit plate; 12. limit block. DETAILED DESCRIPTION

[0034] 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. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0035] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] The terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Thus, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 direct connection, or an indirect connection 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.

[0038] As shown in the figure, in an illustrative embodiment of the pendulum type material level meter of the utility model, the pendulum type material level meter comprises a housing 1 , a pendulum assembly 2 and a travel switch 3 .

[0039] Shell 1;

[0040] The pendulum assembly 2 includes a shaft 201, a swing arm 202 and a cam sleeve 203. The shaft 201 includes a first connection portion 2011 and a second connection portion 2012. The first connection portion 2011 is arranged in the housing 1, and the second connection portion 2012 is arranged outside the housing 1. The cam sleeve 203 is installed on the first connection portion 2011. The swing arm 202 is connected to the second connection portion 2012 so that the swing arm 202 swings between a first position and a second position, and the swinging direction is tangent to the rotation direction of the material in the mixer barrel. The swing arm 202 is in a vertical state when in the first position.

[0041] The travel switch 3 is arranged in the housing 1. A pulley 302 is installed on the trigger button 301 of the travel switch 3. The pulley 302 contacts the surface of the cam sleeve 203. When the swing arm 202 contacts the material and swings to the second position under the push of the material, the surface protrusion 2031 set on the cam sleeve 203 pushes the pulley 302, thereby pressing the trigger button 301 to trigger the travel switch 3.

[0042] In the above-mentioned schematic embodiment, a pendulum assembly 2 and a travel switch 3 are provided in the housing 1. The cam sleeve 203 in the pendulum assembly 2 is key-connected to the first connecting portion 2011. The key connection has good disassembly and assembly properties, and can maintain good centering during assembly, which helps to ensure the accuracy of the connection between the shaft 201 and the cam sleeve 203. When the mixer starts feeding and mixing, the material pushes the swing arm 202 to swing from the first position to the second position, wherein the first position is the position where the swing arm 202 is in an initial state, and the swing arm 202 is vertically downward and perpendicular to the bottom of the mixer. The second position is the position where the travel switch 3 can be triggered to measure the material during the swinging process of the swing arm 202. The swinging direction of the swing arm 202 is tangent to the rotation direction of the material, thereby driving the cam sleeve 203 to rotate and pressing the surface protrusion 2031 arranged on the outer periphery of the cam sleeve 203. The trigger button 301 is pressed down, thereby triggering the travel switch 3 to measure the material level. When the material level in the mixer drops and the material is not in contact with the swing arm 202, there is no external force acting on the swing arm 202. At this time, the swing arm 202 relies on its own gravity to return to the first position from the second position, and the cam sleeve 203 rotates in the opposite direction with the swing arm 202. The surface protrusion 2031 breaks contact with the trigger button 301, and the swing arm 202 returns to the first position, thereby completing the reset. The reset can be automatically completed without manually adjusting the position of the swing arm 202. The reset is fast and efficient. In addition, the material level meter will not operate when the material is not in contact with the swing arm 202, thereby reducing the overall wear of the material level meter, increasing the service life of the material level meter, and avoiding the mutual force generated by the swing arm 202 when encountering fast-flowing materials if it is always in a swinging state to damage the pendulum component 2.

[0043] In some embodiments, the housing 1 includes an upper housing 101 and a lower housing 102, both of which have openings, and the opening of the upper housing 101 is connected to the opening of the lower housing 102. The housing 1 includes the upper housing 101 and the lower housing 102, and the upper housing 101 and the lower housing 102 only need to be separated to repair and replace the internal parts, which is simple to operate and can effectively improve the efficiency of repair and replacement.

[0044] In some embodiments, the upper housing 101 is sealed to the lower housing 102. The upper housing 101 is sealed to the lower housing 102 to prevent materials from splashing into the housing 1, thereby preventing the rotating parts such as the shaft 201 and the bearing 4 from being contaminated by materials to cause hysteresis and jamming, which affects the service life of the device.

[0045] In some embodiments, the first connection part 2011 is provided with a bearing 4, and two bearings 4 are provided, and the two bearings 4 are respectively provided at both ends of the camshaft sleeve 203. The first connection part 2011 rotates in the bearing 4 to reduce friction resistance, making the rotation more stable, and the rotation in the bearing 4 can also increase the stability of the rotation of the first connection part 2011. The camshaft sleeve 203 is provided between the two bearings 4 to protect and clamp the camshaft sleeve 203, avoiding excessive wear caused by contact between the camshaft sleeve 203 and other parts, and also enhancing the stability of the connection between the camshaft sleeve 203 and the first connection part 2011.

[0046] In some embodiments, a reset assembly 5 is also included. The reset assembly 5 includes a bolt with a hole 501 and a tension spring 502. The bolt with a hole 501 is arranged in the housing 1. The tension spring 502 connects the bolt with a hole 501 and the cam sleeve 203. When the swing arm 202 moves from the first position to the second position, the cam sleeve 203 rotates and stretches the tension spring 502 to generate an elastic force to drive the swing arm 202 back to the first position. Through the reset assembly 5 connected to the cam sleeve 203, the cam sleeve 203 can be quickly driven to rotate in the opposite direction by the elastic force generated by the elongation of the tension spring 502 after the cam sleeve 203 rotates, thereby achieving rapid reset.

[0047] In some embodiments, a fixing seat 6 is provided in the housing 1, and an adjusting nut 7 is threadedly connected to the bolt 501 with a hole after passing through the fixing seat 6. The adjusting nut 7 is attached to the fixing seat 6, so as to realize the axial movement of the bolt 501 with a hole and push and pull the tension spring 502 when the adjusting nut 7 is rotated. The bolt 501 with a hole can be moved by adjusting the nut 7 to adjust the tension spring 502. When the swing arm 202 is still offset to the second position after being reset, the bolt 501 with a hole is moved upward, and the tension spring 502 applies a pulling force to the cam sleeve 203 to rotate it, so that the swing arm 202 swings to the first position until it is reset. When the swing arm 202 is offset away from the second position after being reset, the bolt 501 with a hole is moved downward, and the tension spring 502 applies a pushing force to the cam sleeve 203 to rotate it, so that the swing arm 202 is always in a vertical state when in the first position, ensuring the accuracy of the level meter.

[0048] In some embodiments, an adjustment hole 8 is provided on the side wall of the housing 1. The adjustment hole 8 is a long waist hole. A positioning adjustment member 801 that can move up and down is provided in the adjustment hole 8. The positioning adjustment member 801 is connected to the fixing seat 6. The positioning adjustment member 801 includes a locking nut and a locking bolt. The locking bolt is threadedly connected to the locking nut after being connected to the fixing seat 6. The locking nut is attached to the adjustment hole 8. After the locking nut is loosened, the positioning adjustment member 801 can move up and down in the adjustment hole. After the locking nut is tightened, the positioning adjustment member 801 can be fixed at a set position in the adjustment hole 8. The positioning adjustment member 801 that can move up and down in the adjustment hole 8 drives the fixing seat 6 to adjust the up and down position, so that the position of the bolt 501 with a hole installed on the fixing seat 6 can be directly adjusted to control the tightness of the tension spring 502. There is no need to open the housing 1 and then twist the adjusting nut 7 for adjustment, so as to improve the use efficiency.

[0049] In some embodiments, an end cap 9 is installed at the end of the first connection portion 2011, and one side surface of the end cap 9 is attached to the inner wall of the housing 1, and the other side surface is attached to the surface of the bearing 4, so that the housing 1 and the bearing 4 can axially limit the shaft 201 by clamping the end cap 9. The first connection portion 2011 is fixed by the end cap 9 clamped by the housing 1 and the bearing 4, so as to improve the axial stability of the shaft 201 during the rotation process and prevent the first connection portion 2011 from being separated from the housing 1.

[0050] In some embodiments, a first limit plate 10 is provided in the housing 1, and when the swing arm 202 is in the first position, the tension spring 502 is in a non-elastic deformation state, and the surface protrusion 2031 is attached to the first limit plate 10 to prevent the swing arm 202 from swinging in a direction away from the second position. The first limit plate 10 is provided so that when the surface protrusion 2031 contacts the first limit plate 10, the tension spring 502 is in a non-elastic deformation state, so that the swing arm 202 can be in a vertical initial state, and at the same time, it can also prevent the tension spring 502 from contracting too much when the swing arm 202 is reset, causing the swing arm 202 to swing in a direction away from the second position, resulting in failure to reset to a vertical state.

[0051] In some embodiments, a second limit plate 11 is provided in the housing 1, and a limit block 12 is provided on the cam sleeve 203. The limit block 12 is connected to the tension spring 502. When the swing arm 202 swings to the second position, the tension spring 502 is stretched by the limit block 12, and the limit block 12 is attached to the second limit plate 11 to prevent the swing arm 202 from swinging away from the first position. The limit block 12 provided on the cam sleeve 203 is connected to the tension spring 502. When the swing arm swings, the cam sleeve rotates, and the tension spring 502 is stretched under the drive of the limit block 12. When the swing arm 202 swings to the second position, the limit block 12 is attached to the second limit plate 11 provided in the housing, thereby limiting the maximum swing amplitude of the swing arm 202, ensuring that the swing arm 202 is at the highest point when in the second position, avoiding the swing arm swinging position being too high so that the tension spring 502 is overstretched and loses its elasticity, and limiting the swing amplitude of the swing arm 202 can also avoid excessive addition of materials affecting stirring.

[0052] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0053] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for which protection is requested in the utility model.

Claims

1. A pendulum type level meter, applied to a mixer, characterized in that: include: Housing (1); A pendulum assembly (2), the pendulum assembly comprising a shaft (201), a swing arm (202) and a cam sleeve (203), the shaft (201) comprising a first connecting portion (2011) and a second connecting portion (2012), the first connecting portion (2011) being arranged inside the housing (1), the second connecting portion (2012) being arranged outside the housing (1), the cam sleeve (203) being mounted on the first connecting portion (2011), the swing arm (202) being connected to the second connecting portion (2012), so as to enable the swing arm (202) to swing between a first position and a second position, and the swinging direction is tangent to the rotation direction of the material in the mixer barrel, and the swing arm (202) is in a vertical state when in the first position; A travel switch (3), wherein the travel switch (3) is arranged in the housing (1), a pulley (302) is installed on the trigger button (301) of the travel switch (3), and the pulley (302) is in contact with the surface of the cam sleeve (203). When the swing arm (202) contacts the material and swings to the second position under the push of the material, the surface protrusion (2031) provided on the cam sleeve (203) pushes the pulley (302), thereby pressing the trigger button (301) to trigger the travel switch (3).

2. The pendulum type level meter according to claim 1, characterized in that: The housing (1) comprises an upper housing (101) and a lower housing (102); the upper housing (101) and the lower housing (102) both have openings; the opening of the upper housing (101) is connected to the opening of the lower housing (102).

3. The pendulum type level meter according to claim 2, characterized in that: The upper shell (101) is sealedly connected to the lower shell (102).

4. The pendulum type level meter according to claim 1, characterized in that: A bearing (4) is provided outside the first connecting portion (2011), and two bearings (4) are provided. The two bearings (4) are respectively provided at two ends of the camshaft sleeve (203).

5. The pendulum type level meter according to claim 1, characterized in that: The invention also comprises a reset assembly (5), wherein the reset assembly comprises a bolt with a hole (501) and a tension spring (502), wherein the bolt with a hole (501) is arranged in the housing (1), and the tension spring (502) connects the bolt with a hole (501) and the cam sleeve (203), and when the swing arm (202) moves from the first position to the second position, the cam sleeve (203) rotates and stretches the tension spring (502) to generate an elastic force driving the swing arm (202) to return to the first position.

6. The pendulum type level meter according to claim 5, characterized in that: A fixing seat (6) is provided in the housing (1), and the hole bolt (501) is threadedly connected with an adjusting nut (7) after passing through the fixing seat (6). The adjusting nut (7) is attached to the fixing seat (6) so as to enable the hole bolt (501) to move axially and push and pull the tension spring (502) when the adjusting nut (7) is rotated.

7. The pendulum type level meter according to claim 6, characterized in that: An adjustment hole (8) is provided on the side wall of the shell (1); the adjustment hole (8) is a long waist hole; a positioning adjustment member (801) capable of moving up and down is provided in the adjustment hole (8); the positioning adjustment member (801) is connected to the fixing seat (6).

8. The pendulum type level meter according to claim 4, characterized in that: An end cover (9) is installed at the end of the first connecting portion (2011), and one side surface of the end cover (9) is attached to the inner wall of the housing (1), and the other side surface is attached to the surface of the bearing (4), so that the housing (1) and the bearing (4) can axially limit the shaft (201) by clamping the end cover (9).

9. The pendulum type material level meter according to claim 5, characterized in that: A first limiting plate (10) is provided in the shell (1); when the swing arm (202) is in the first position, the tension spring (502) is in a non-elastic deformation state, and the surface protrusion (2031) is attached to the first limiting plate (10) to prevent the swing arm (202) from swinging in a direction away from the second position.

10. The pendulum type material level meter according to claim 5, characterized in that: A second limit plate (11) is provided in the shell, and a limit block (12) is provided on the camshaft sleeve (203). The limit block (12) is connected to the tension spring (502). When the swing arm (202) swings to the second position, the tension spring (502) is stretched by the limit block (12), and the limit block (12) is attached to the second limit plate (11) to prevent the swing arm (202) from swinging in a direction away from the first position.

Images