A dispensing valve

Abstract

The present invention discloses a dispensing valve. The dispensing valve provided by the present invention comprises a housing, a dispensing assembly, a display assembly and a transmission mechanism, wherein the housing is provided with a material channel and an axial hole penetrating the side wall of the material channel; the dispensing assembly comprises a rotating shaft penetrating the axial hole and a dispensing plate arranged in the material channel and extending from the side wall of the rotating shaft to one side of the rotating shaft; the display assembly comprises a scale and a cursor, and the transmission mechanism is connected to the cursor and the rotating shaft, and the transmission mechanism converts the rotational motion of the rotating shaft into a linear motion of the cursor sliding along the extension direction of the scale. The dispensing valve has accurate display, and solves the problem of certain display errors in the existing dispensing valves.

Description

Technical Field

[0001] The invention relates to material dispensing equipment, and more particularly to a material dispensing valve with a linear display. Background Art

[0002] In the powder modification process, in order to optimize the grading, different proportions of powder are often required for different grinding treatments. Therefore, it is crucial to accurately control the proportion of powder. At present, the powder dividing valve usually uses an arc-shaped dial to display and read the position of the dividing plate in the material layer section of the material channel. In the prior art, the operator reads the angle data indicated by the cursor on the arc-shaped dial, and uses the ratio of the angle indicated by the cursor on the arc-shaped dial to the angle range of the dial as the relative position of the dividing plate of the dividing valve in the material layer section of the material channel. Since the accumulation shape of the powder material layer in the material channel is horizontal and flush in the material channel, there is a certain relative position error with the scale distribution of the arc-shaped dial. Therefore, the practice of reading the arc-shaped dial angle as the position of the dividing plate in the material layer section of the material channel has a certain error. Summary of the invention

[0003] In order to solve the above problems, the purpose of the embodiment of the present application is to provide a material distribution valve, which has the function of linear display, converting the circular motion of the material distribution plate around the rotating axis into the linear motion of the cursor sliding along the extension direction of the scale, and displaying it through the pointer and the scale. Therefore, the material distribution valve described in the embodiment of the present application can accurately control the material amount ratio on both sides within the full range and display it linearly.

[0004] The technical solution of the embodiment of the present application is:

[0005] A dispensing valve, comprising:

[0006] A housing having a material passage and an axial hole penetrating a side wall of the material passage;

[0007] A material distribution assembly, comprising a rotating shaft passing through the shaft hole and a material distribution plate disposed in the material channel and extending from a side wall of the rotating shaft to one side of the rotating shaft;

[0008] Display components, including

[0009] A scale, arranged outside the housing, perpendicular to the rotating shaft, with scales arranged on one side;

[0010] a cursor, slidably connected to the housing and located on a side of the scale having scales, capable of sliding along an extension direction of the scale; and

[0011] A transmission mechanism is connected to the cursor and the rotating shaft, and is used to convert the rotational motion of the rotating shaft into a linear motion of the cursor sliding along the extension direction of the scale, so that the sliding distance of the cursor is proportional to the movement distance of the end of the dividing plate away from the rotating shaft in the material channel in a width direction perpendicular to the rotating shaft.

[0012] In some exemplary embodiments, the transmission mechanism includes:

[0013] A connecting portion, connected to the cursor and provided with a strip hole, wherein the length direction of the strip hole is perpendicular to the rotating shaft and the scale, and the depth direction of the strip hole is parallel to the rotating shaft;

[0014] a slider, at least partially accommodated in the strip-shaped hole and capable of sliding along the strip-shaped hole; and

[0015] A connecting rod has one end connected to the slider and the other end connected to the rotating shaft.

[0016] In some exemplary embodiments, the slider is constructed as a cylindrical structure parallel to the rotating shaft and passing through the strip-shaped hole.

[0017] In some exemplary embodiments, the distance from the slider to the rotating shaft is equal to the distance from the end of the dividing plate facing away from the rotating shaft to the end of the dividing plate connected to the rotating shaft.

[0018] In some exemplary embodiments, the connecting rod is a straight rod, the dividing plate is a flat plate, and the connecting rod is parallel to the dividing plate.

[0019] In some exemplary embodiments, the dispensing valve further includes a guide rail connected to the housing and parallel to the scale;

[0020] The cursor also includes

[0021] The sliding part is provided with a sliding hole sleeved on the guide rail, and the sliding part can slide along the guide rail

[0022] A slide connected to the connecting portion; and

[0023] The pointer is connected to the sliding part and extends to one side of the scale.

[0024] In some exemplary embodiments, the cross-section of the matching portion between the guide rail and the sliding hole is non-circular.

[0025] In some exemplary embodiments, the length direction of the strip-shaped hole is vertically arranged, and a through screw hole is arranged on the lowermost side wall of the strip-shaped hole, and the axial direction of the screw hole is the same as the length direction of the strip-shaped hole;

[0026] The dispensing valve further comprises a screw rod, which is passed through the screw hole and is threadedly connected with the screw hole.

[0027] In some exemplary embodiments, the rotating shaft passes through a middle portion of the material channel.

[0028] In some exemplary embodiments, the scale and the rotating shaft are both perpendicular to the extension direction of the material channel.

[0029] In some exemplary embodiments, the measuring range of the scale is the same as the width of the material channel in a direction parallel to the scale.

[0030] The beneficial effects of the dispensing valve described in the embodiment of the present application are:

[0031] The present application is capable of converting the rotary motion of the rotating shaft into the linear motion of the cursor sliding along the extension direction of the scale by arranging a material dividing plate rotating around the rotating shaft inside the housing, arranging a scale perpendicular to the rotating shaft outside the housing, arranging a cursor slidingly connected to the scale, and arranging a transmission mechanism connected to the cursor and the rotating shaft, so that the sliding distance of the cursor is proportional to the movement distance of the end of the material dividing plate away from the rotating shaft in the width direction of the material channel perpendicular to the rotating shaft, and is displayed and read out through the cursor and the scale. Therefore, the material dividing valve can accurately control the material quantity ratio on both sides within the full range and display it linearly, solving the problem that the existing technology uses an arc-shaped scale plate to display the position of the material dividing plate in the material channel, resulting in a certain error in the display.

[0032] Furthermore, the connecting rod is set to be a straight rod, the dividing plate is set to be a flat plate, the connecting rod and the dividing plate are set to be parallel, and the distance from the slider to the rotating shaft is set to be equal to the distance from the end of the dividing plate facing away from the rotating shaft to the end of the dividing plate connected to the rotating shaft, thereby, the movement trajectory of the connecting rod around the rotating shaft is the same as the movement trajectory of the dividing plate around the rotating shaft, the movement trajectory of the end of the connecting rod away from the rotating shaft is the same as the movement trajectory of the end of the dividing plate away from the rotating shaft, and the dividing material is completed by the end of the dividing plate away from the rotating shaft in the outer shell, and the slider connected to the end of the connecting rod away from the rotating shaft can slide along the strip hole of the cursor in a direction perpendicular to the rotating shaft and the scale, so the scale corresponding to the pointer of the cursor is the exact position of the end of the dividing plate away from the rotating shaft, that is, the pointer accurately displays the dividing position of the dividing plate of the dividing valve in the outer shell.

[0033] Furthermore, after the cursor position is determined (i.e., the powder material ratio is determined), the screw is rotated to support the upper end of the connecting rod, thereby fixing the material distribution plate. The material layer section of the material channel is controlled to be rectangular, and the scale range is the same as the material layer width of the material channel. Since the screw can fix the upper end of the connecting rod at any position within the range by rotating, the material distribution valve can accurately control the material ratio on both sides within the full range and display it linearly.

[0034] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0036] Figure 1 This is a schematic diagram of the main structure of a material distribution valve according to an embodiment of the present application;

[0037] Figure 2 This is a schematic cross-sectional view of a material channel material layer according to an embodiment of the present application;

[0038] Figure 3 for Figure 1 A schematic diagram of a structure in which the cursor is located at the end of the scale;

[0039] Figure 4 for Figure 1 A schematic diagram of the cross-sectional structure of the dispensing valve viewed from the left side;

[0040] Figure 5 for Figure 4 Schematic diagram of the partial enlarged structure of part A in the middle.

[0041] Figure markings: 1-housing, 11-axis hole, 12-material channel, 2-material dividing assembly, 21-rotating shaft, 22-material dividing plate, 3-display assembly, 31-scale, 311-scale, 32-cursor, 321-sliding part, 3211-sliding hole, 322-pointer, 4-transmission mechanism, 41-connecting part, 411-bar hole, 412-screw hole, 42-slider, 43-connecting rod, 5-guide rail, 6-screw. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. 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.

[0043] See also Figure 1-5 A schematic diagram of the structure of the dispensing valve described in the exemplary embodiment of the present application. Figure 1 , 3As shown in Figures 4 and 5, the present application provides a dispensing valve, comprising a housing 1, a dispensing assembly 2, a display assembly 3 and a transmission mechanism 4. The housing 1 is provided with a material channel 12 and an axial hole 11 penetrating the side wall of the material channel 12; the dispensing assembly 2 comprises a rotating shaft 21 penetrating the axial hole 11 and a dispensing plate 22 disposed in the material channel 12 and extending from the side wall of the rotating shaft 21 to one side of the rotating shaft 21; the display assembly 3 comprises a scale 31 and a cursor 32; and the transmission mechanism 4 is connected to the cursor 32 and the rotating shaft 21.

[0044] More specifically, the scale 31 is arranged outside the shell 1, the scale 31 is perpendicular to the rotating shaft 21, and a scale 311 is arranged on one side of the scale 31; the cursor 32 is slidably connected to the shell 1 and is located on the side of the scale 31 with the scale, and the cursor 32 can slide along the extension direction of the scale 31; the transmission mechanism 4 is used to convert the rotational motion of the rotating shaft 21 into a linear motion of the cursor 32 sliding along the extension direction of the scale 31, so that the sliding distance of the cursor 32 is proportional to the movement distance of the end of the dividing plate 22 away from the rotating shaft 21 in the material channel 12 perpendicular to the width direction of the rotating shaft 21.

[0045] like Figure 4 As shown, the material distribution valve described in the embodiment of the present application, the material powder is Figure 1 The upper end of the shell 1 is poured into the material channel 12 of the inner cavity of the shell 1, and then Figure 1 The powdered material can be transferred to the outer portion of the upper end of the housing 1 by a conveying mechanism such as a belt.

[0046] Figure 2 A schematic cross-sectional view of a material layer of a material channel 12 in a housing 1 according to an embodiment of the present application is shown. Figure 2 The material channel of the illustrated embodiment is rectangular, but the material channel 12 of the housing 1 of the material distribution valve of the present application is not limited thereto. The cross-section of the material layer of the material channel of the material distribution valve of the present application may also be other shapes that are linearly distributed along the extension direction of the scale.

[0047] It should be noted that, in the dividing valve described in the embodiment of the present application, the rotating shaft 21 and the dividing plate 22 rotate synchronously, and the transmission mechanism 4 and the rotating shaft 21 also rotate synchronously, that is, the dividing plate 22, the rotating shaft 21 and the transmission mechanism 4 of the dividing valve described in the embodiment of the present application all rotate synchronously around the axial center line of the rotating shaft 21.

[0048] The material dispensing valve described in the embodiment of the present application is capable of converting the rotational motion of the rotating shaft 21 into a linear motion of the cursor 32 sliding along the extension direction of the scale 31 by arranging a dispensing plate 22 rotating around the rotating shaft 21 in the housing 1, arranging a scale 31 perpendicular to the rotating shaft outside the housing 1, arranging a cursor 32 slidably connected to the scale 31, and arranging a transmission mechanism 4 connected to the cursor 32 and the rotating shaft 21, so that the sliding distance of the cursor 32 is proportional to the movement distance of the end of the dispensing plate 22 away from the rotating shaft 21 in the material channel 12 perpendicular to the width direction of the rotating shaft 21, and is displayed and read by the cursor 32 and the scale 31, and then the dispensing position of the dispensing plate 22 is obtained by proportional conversion. Therefore, the dispensing valve can accurately control the material quantity ratio on both sides within the full range and display it linearly, solving the problem that the prior art uses an arc-shaped scale plate as a display and reading of the position of the dispensing plate in the material channel, resulting in a certain error in the display.

[0049] In some exemplary embodiments, Figure 1 , 3 As shown in FIG. 4 , the transmission mechanism 4 includes a connecting portion 41 , a slider 42 and a connecting rod 43 .

[0050] The connecting portion 41 is connected to the cursor 32 and is provided with a strip hole 411. The extending direction of the strip hole 411 in the length direction is perpendicular to the rotating shaft 21 and the scale 31. The depth direction of the strip hole 411 is parallel to the rotating shaft 21.

[0051] The slider 42 is at least partially accommodated in the strip hole 411 and the slider 42 can slide along the strip hole 411;

[0052] One end of the connecting rod 43 is connected to the slider 42 and the other end is connected to the rotating shaft 21 .

[0053] Specifically, the longitudinal extension direction of the strip hole 411 of the transmission mechanism 4 is perpendicular to the rotating shaft 21 and the scale 31, the slider 42 of the transmission mechanism 4 can slide back and forth along the strip hole 411, and the scale 31 is perpendicular to the rotating shaft 21. The material dividing plate 22, the rotating shaft 21 and the connecting rod 43 of the material dividing valve are all synchronously rotated around the axial center line of the rotating shaft 21, and the relative position of the cursor 32 on the scale 31 is the position of the slider 42 of the transmission mechanism 4 relative to the plane where the material layer section of the material channel 12 is located in the extension direction of the scale 31. The relative position of the cursor 32 on the scale 31 further shows the position of the end of the material dividing plate 22 away from the rotating shaft 21 relative to the plane where the material layer section of the material channel 12 is located in the extension direction of the scale 31.

[0054] In some exemplary embodiments, Figure 1 , 3 As shown, the slider 42 is constructed as a cylindrical structure parallel to the rotating shaft 21 and passing through the strip hole 411 .

[0055] Specifically, the slider 42 is constructed as a cylindrical structure parallel to the rotating shaft 21, so that the slider 42 can smoothly slide back and forth in the strip hole 411 under the drive of the connecting rod 43. Figure 1 The upper end of the strip hole 411 shown slides to Figure 3 The lower end of the strip hole 411 shown in the figure, and at the same time, the end of the connecting rod 43 away from the rotating shaft 21 is also moved from Figure 1 The vertical position shown is rotated to Figure 3 The right end side of the scale 31 shown.

[0056] Of course, the specific structure of the slider 42 is not limited to a cylindrical structure. The slider 42 may also be a rectangular structure hingedly connected to the connecting rod 43, or other structures and connection methods, but it must be able to rotate with the connecting rod 43 and slide back and forth in the bar hole 411.

[0057] In some exemplary embodiments, Figure 4 As shown, the distance from the slider 42 to the rotating shaft 21 is equal to the distance from the end of the dividing plate 22 facing away from the rotating shaft 21 to the end of the dividing plate 22 connected to the rotating shaft 21 .

[0058] Specifically, the distance from the slider 42 to the rotating shaft 21 is set to be equal to the distance from the end of the dividing plate 22 facing away from the rotating shaft 21 to the end of the dividing plate 22 connected to the rotating shaft 21, thereby, the movement trajectory of the end of the connecting rod 43 away from the rotating shaft 21 is the same as the movement trajectory of the end of the dividing plate 22 away from the rotating shaft 21, and the dividing material is completed by the end of the dividing plate 22 away from the rotating shaft 21 in the outer shell 1, and the slider 42 connected to the end of the connecting rod 43 away from the rotating shaft 21 can slide along the strip hole 411 of the cursor 32 in a direction perpendicular to the rotating shaft 21 and the scale 31, so the scale corresponding to the cursor 32 is the exact position of the end of the dividing plate 22 away from the rotating shaft 21, that is, the cursor 32 accurately displays the dividing position of the end of the dividing plate 22 of the dividing valve away from the rotating shaft 21 in the material layer cross section of the material channel 12.

[0059] In some exemplary embodiments, Figure 4 As shown, the connecting rod 43 is a straight rod, the dividing plate 22 is a flat plate, and the connecting rod 43 is parallel to the dividing plate 22.

[0060] Specifically, the connecting rod 43 is set to be a straight rod, the material dividing plate 22 is a flat plate, and the connecting rod 43 is parallel to the material dividing plate 22. This setting facilitates accurate calculation of the exact mass of the powder on both sides of the material dividing plate 22. Of course, the connecting rod 43 is not limited to a straight rod, but can also be other shapes, and the material dividing plate 22 is not limited to a flat plate, but can also be a curved plate linearly distributed along the radial direction of the rotating shaft 21.

[0061] In some exemplary embodiments, Figure 4 , 5As shown, the dispensing valve further includes a guide rail 5 connected to the housing 1 and parallel to the scale 31; the cursor 32 includes a sliding portion 321 and a pointer 322. The sliding portion 321 is provided with a sliding hole 3211 sleeved on the guide rail 5, the sliding portion 321 can slide along the guide rail 5, and the sliding portion 321 is connected to the connecting portion 41; the pointer 322 is connected to the sliding portion 321 and extends to one side of the scale 311.

[0062] In some exemplary embodiments, the cross section of the matching portion of the guide rail 5 and the slide hole 3211 is non-circular. Figure 4 , 5 In the dosing valve shown, the cross-section of the slide hole 3211 and the matching part of the guide rail 5 and the slide hole 3211 are rectangular. Of course, the cross-section of the matching part of the guide rail 5 and the slide hole 3211 and the shape of the slide hole 3211 are not limited to rectangles, and can be other non-circular shapes such as ellipse and polygon. This structural design makes the relative sliding movement between the sliding part and the guide rail smoother, so as to improve the structural connection stability and measurement accuracy of the dosing valve.

[0063] In some exemplary embodiments, Figure 4 , 5 As shown, the length direction of the strip hole 411 is vertically arranged, and a through screw hole 412 is arranged on the lowermost side wall of the strip hole 411, and the axial direction of the screw hole 412 is the same as the length direction of the strip hole 411;

[0064] The dispensing valve further includes a screw rod 6 , which passes through the screw hole 412 and is threadedly connected to the screw hole 412 .

[0065] Specifically, after the positions of the material distributor plate 22 and the cursor 32 are determined (i.e., after the material distribution ratio is determined), the position of the slider 42 in the strip hole 411 is fixed by rotating the screw 6 to support the slider 42 at the upper end of the connecting rod 43, thereby fixing the position of the material distributor plate 22 in the material channel 12. Since the screw 6 can fix the slider 42 at the upper end of the connecting rod 43 at any position within the range of the scale 31 by rotating, the material distributor valve can accurately control the material amount ratio on both sides of the material distributor plate 22 within the full range and display it linearly.

[0066] In some exemplary embodiments, Figure 1 , 3 As shown, the rotating shaft 21 passes through the middle of the material channel 12 .

[0067] Specifically, the rotating shaft 21 is arranged to pass through the middle of the material channel 12. Figure 1 and Figure 3 The rotating shaft 21 is located at the middle of the bottom of the housing 1 .

[0068] Furthermore, when the dividing plate 22 drives the cursor 32 to slide to the two ends of the scale 31 (for example Figure 3When the dividing plate 22 drives the cursor 32 to slide to the middle position of the scale 31, that is, when the cursor 32 indicates the scale is half of the range, the slider 42 connected to one end of the connecting rod 43 is at the uppermost end of the strip hole 411. The dividing valve described in this structural feature can fully utilize the linear display structural feature of the dividing valve of the present application, so that the powder capacity of the housing 1 can be as large as possible while accurately displaying the position of the dividing plate 22 in the housing 1.

[0069] In some exemplary embodiments, the scale 31 and the rotating shaft 21 are both perpendicular to the extension direction of the material channel 12 .

[0070] Specifically, the scale 31 and the rotating shaft 21 are both perpendicular to the extension direction of the material channel 12, which is convenient for the manufacturing, assembly, adjustment and material metering of the separation valve. Of course, the scale 31 can also be perpendicular to the extension direction of the material channel 12, while the rotating shaft 21 is not perpendicular to the extension direction of the material channel 12.

[0071] In some exemplary embodiments, the measuring range of the scale 31 is the same as the width of the material channel 12 in a direction parallel to the scale 31 .

[0072] Specifically, the range of the scale 31 is set to be the same as the width of the material channel 12 in the direction parallel to the scale 31, so that the scale indicated by the pointer 322 of the cursor 32 is the material separation position of the material separation plate 22 in the housing 1 relative to the material layer cross section of the material channel 12. If it is necessary to determine the material separation position of the material separation plate 22, just read the scale of the pointer 322. Of course, the range of the scale 31 can also be set to be unequal to the width of the material channel 12 in the direction parallel to the scale 31. In this case, further proportional conversion is required to obtain the accurate material separation position of the material separation plate 22.

[0073] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0075] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A dispensing valve, characterized in that: include: A housing having a material passage and an axial hole penetrating a side wall of the material passage; A material distribution assembly, comprising a rotating shaft passing through the shaft hole and a material distribution plate disposed in the material channel and extending from a side wall of the rotating shaft to one side of the rotating shaft; Display components, including A scale, arranged outside the housing, perpendicular to the rotating shaft, with scales arranged on one side; a cursor, slidably connected to the housing and located on a side of the scale having scales, capable of sliding along an extension direction of the scale; and A transmission mechanism, connected to the cursor and the rotating shaft, for converting the rotational motion of the rotating shaft into a linear motion of the cursor sliding along the extension direction of the scale, so that the sliding distance of the cursor is proportional to the movement distance of the end of the dividing plate away from the rotating shaft in the width direction of the material channel perpendicular to the rotating shaft; The cursor displays the material distribution position of the end of the material distribution plate away from the rotating shaft in the material layer cross section of the material channel; The transmission mechanism comprises: A connecting portion, connected to the cursor and provided with a strip hole, wherein the length direction of the strip hole is perpendicular to the rotating shaft and the scale, and the depth direction of the strip hole is parallel to the rotating shaft; A slider, at least partially accommodated in the strip-shaped hole and capable of sliding along the strip-shaped hole; as well as A connecting rod has one end connected to the slider and the other end connected to the rotating shaft.

2. The dispensing valve according to claim 1, characterized in that: The sliding block is constructed as a cylindrical structure parallel to the rotating shaft and passing through the strip hole.

3. The dispensing valve according to claim 1, characterized in that: The distance from the slider to the rotating shaft is equal to the distance from one end of the dividing plate facing away from the rotating shaft to one end of the dividing plate connected to the rotating shaft.

4. The dispensing valve according to claim 3, characterized in that: The connecting rod is a straight rod, the dividing plate is a flat plate, and the connecting rod is parallel to the dividing plate.

5. The dispensing valve according to claim 1, characterized in that: The dispensing valve further comprises a guide rail connected to the housing and parallel to the scale; The cursor includes A sliding part, provided with a sliding hole sleeved on the guide rail, the sliding part can slide along the guide rail and is connected to the connecting part; and The pointer is connected to the sliding part and extends to one side of the scale.

6. The dispensing valve according to claim 5, characterized in that: The cross section of the matching portion between the guide rail and the slide hole is non-circular.

7. The dispensing valve according to claim 1, characterized in that: The length direction of the strip-shaped hole is vertically arranged, and a through screw hole is arranged on the lowermost side wall of the strip-shaped hole, and the axial direction of the screw hole is the same as the length direction of the strip-shaped hole; The dispensing valve further comprises a screw rod, which is passed through the screw hole and is threadedly connected with the screw hole.

8. The dispensing valve according to claim 1, characterized in that: The rotating shaft passes through the middle of the material channel.

9. The dispensing valve according to any one of claims 1 to 8, characterized in that: The scale and the rotating shaft are both perpendicular to the extending direction of the material channel.

10. The dispensing valve according to claim 8, characterized in that: The measuring range of the scale is the same as the width of the material channel in a direction parallel to the scale.

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