Quantitative injection device

Abstract

The invention provides a quantitative injection device, comprising: a quantitative injection cylinder having an inner cavity, and a material adding port and a quantitative injection port communicating with the inner cavity; the piston piece is movably arranged in the inner cavity; the first driving piece is in driving connection with the piston piece so as to drive the piston piece to move in the inner cavity in the vertical direction; and the clamping assembly is arranged on the quantitative injection cylinder, and the clamping assembly has a clamping state capable of being clamped on equipment and an opening state capable of being separated from the equipment. Through the technical scheme provided by the invention, the problem that an injection device in the related technology cannot perform controllable quantitative injection can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of injection devices, and in particular to a quantitative injection device. Background Art

[0002] Carbon dioxide, a carbon oxide with the chemical formula CO 2 , is a colorless and tasteless or colorless and odorless gas at room temperature and pressure, and its aqueous solution has a slightly sour taste. It is also a common greenhouse gas and a component of air. Supercritical carbon dioxide has the characteristics of low viscosity, good fluidity, and strong solubility, which can significantly increase CO 2 Oil recovery rate of gas drive. 2 In order to ensure pipeline safety and reduce operating costs, gas phase or supercritical state transportation is generally selected. From the gas storage tank to the gas injection wellhead, CO 2 Exists in gaseous or liquid form.

[0003] In the related art, a hole is opened at the top of the oil pipe at the wellhead where liquid carbon dioxide is injected, and a thin tube with a heating jacket is connected to the top of the oil pipe. When the chemical is injected into the oil pipe from the tank storing the chemical, the heated chemical reacts with the low-temperature and high-pressure liquid CO2 due to the presence of the heating jacket. 2 Contact, it is not easy to cause ice blockage at the wellhead.

[0004] However, the injection device in the related art cannot perform controlled quantitative injection, resulting in poor practicality of the device and failure to meet usage requirements. Summary of the invention

[0005] The present invention provides a quantitative injection device to solve the problem that the injection device in the related art cannot perform controllable quantitative injection.

[0006] The present invention provides a quantitative injection device, which comprises: a quantitative injection cylinder, which has an inner cavity and a material addition port and a quantitative injection port communicated with the inner cavity; a piston member, which is movably arranged in the inner cavity; a first driving member, which is drivingly connected to the piston member to drive the piston member to move vertically in the inner cavity; a clamping assembly, which is arranged on the quantitative injection cylinder, and the clamping assembly has a clamping state in which it can be clamped on a device and an open state separated from the device.

[0007] Furthermore, the piston member includes a piston push plate and a piston cylinder. The piston push plate is movably arranged in the inner cavity and sealed with the cavity wall of the inner cavity. The piston cylinder is vertically penetrated in the inner cavity. The lower end of the piston cylinder is connected to the piston push plate. The first driving member is drivingly connected to the piston cylinder.

[0008] Furthermore, the quantitative injection device also includes a fixed support frame and a transmission screw. The lower end of the fixed support frame is connected to the upper end of the quantitative injection cylinder. The transmission screw is rotatably arranged on the fixed support frame around its vertical axis. The piston cylinder has a screw hole extending vertically. The transmission screw is inserted into the screw hole and cooperates with the piston cylinder thread. The first drive member is drivingly connected to the transmission screw.

[0009] Furthermore, the quantitative injection device also includes a first slide rod, which is connected to the quantitative injection cylinder and extends vertically. A limiting sliding sleeve is provided on the outer side wall of the piston cylinder, and the limiting sliding sleeve is slidably mounted on the first slide rod along the vertical direction.

[0010] Furthermore, the quantitative injection device also includes a movable positioning transverse cylinder, which is movably arranged on the quantitative injection cylinder in the vertical direction, and the clamping assembly is arranged on the movable positioning transverse cylinder.

[0011] Furthermore, a fixed connecting plate extending vertically is provided on the outer side wall of the quantitative injection cylinder, and a plurality of fixed slots are provided on the fixed connecting plate. The plurality of fixed slots are arranged at intervals along the vertical direction. A movable limiting slider is provided on the movable positioning transverse cylinder, and the limiting slider can be selectively inserted in one of the fixed slots.

[0012] Furthermore, two limit sliders are provided on the movable positioning transverse cylinder, and the two limit sliders are arranged at intervals in the transverse direction. A plurality of fixed slots are provided on both sides of the fixed connecting plate, and one of the limit sliders can be selectively inserted in one of the fixed slots on one side of the fixed connecting plate, and the other limit slider can be selectively inserted in one of the fixed slots on the other side of the fixed connecting plate. The quantitative injection device also includes a reset spring, and the two ends of the reset spring are respectively abutted against the two limit sliders; and / or the limit slider has a pressing block and a fixed plug block, the pressing block is located on the outside of the movable positioning transverse cylinder, and the fixed plug block can be selectively inserted in one of the fixed slots.

[0013] Furthermore, the clamping assembly includes two movable clamps, which are arranged at intervals along the transverse direction. Both movable clamps can be movably arranged laterally on the movable positioning transverse cylinder. When the clamping assembly switches from the clamping state to the open state, the two movable clamps move away from each other.

[0014] Furthermore, the quantitative injection device also includes a bidirectional screw and a rotating handle. The bidirectional screw is rotatably arranged around its transverse axis and is inserted into the movable positioning transverse cylinder. The bidirectional screw has a first thread segment and a second thread segment with opposite thread rotation directions. Two movable clamps are respectively arranged on the first thread segment and the second thread segment. The rotating handle is drivingly connected to the bidirectional screw.

[0015] Furthermore, the quantitative injection device also includes a second slide bar, which is laterally penetrated through the movable positioning transverse cylinder, and the two movable clamping plates are both sleeved on the second slide bar.

[0016] Applying the technical solution of the present invention, the quantitative injection device includes a quantitative injection cylinder, a piston member, a first driving member and a clamping assembly. When in use, the clamping assembly is first set to a clamping state, so that the quantitative injection cylinder can be fixed on the equipment by using the clamping assembly. Since the quantitative injection cylinder has an inner cavity and a material addition port and a quantitative injection port connected to the inner cavity, the material (such as carbon dioxide) can enter the inner cavity through the material addition port. The piston member is movably arranged in the inner cavity, and the first driving member is drivingly connected to the piston member to drive the piston member to move vertically in the inner cavity so that the material in the inner cavity is discharged through the quantitative injection port. With the above structure, the quantitative injection cylinder, the piston member and the first driving member are used in combination to achieve quantitative injection of materials, improve the practicality of the device, and meet the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic structural diagram of a quantitative injection device provided according to an embodiment of the present invention is shown;

[0019] Figure 2 A schematic structural diagram of a quantitative injection device according to another perspective of an embodiment of the present invention is shown;

[0020] Figure 3 A schematic structural diagram of a quantitative injection device according to another perspective of an embodiment of the present invention is shown;

[0021] Figure 4 A schematic structural diagram of a quantitative injection device provided according to an embodiment of the present invention from another perspective is shown.

[0022] The above drawings include the following reference numerals:

[0023] 1. Quantitative injection cylinder; 2. Material addition port; 3. Quantitative injection port; 4. Piston push plate; 5. Piston cylinder; 501. Limit sliding sleeve; 6. Transmission screw; 7. First driving member; 8. Fixed support frame; 9. First slide bar; 10. Movable positioning transverse cylinder; 11. Rotating handle; 12. Moving splint; 13. Friction-increasing contact pad; 14. Fixed connecting plate; 15. Positioning part; 1501. Fixed slot; 16. Positioning operation block; 17. Limit sliding block; 1701. Pressing block; 1702. Fixed plug block; 18. Bidirectional screw; 19. Second slide bar; 20. Return spring. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings 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. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments of the present invention are within the scope of protection of the present invention.

[0025] like Figures 1 to 4 As shown, an embodiment of the present invention provides a quantitative injection device, which includes a quantitative injection cylinder 1, a piston member, a first driving member 7 and a clamping assembly. The quantitative injection cylinder 1 has an inner cavity and a material addition port 2 and a quantitative injection port 3 communicated with the inner cavity. The piston member is movably arranged in the inner cavity. The first driving member 7 is drivingly connected to the piston member to drive the piston member to move vertically in the inner cavity. The clamping assembly is arranged on the quantitative injection cylinder 1, and the clamping assembly has a clamping state capable of being clamped on the device and an open state separated from the device.

[0026] When using the quantitative injection device provided in this embodiment, the clamping assembly is first set to a clamping state to fix the quantitative injection cylinder 1 on the device using the clamping assembly. Since the quantitative injection cylinder 1 has an inner cavity and a material addition port 2 and a quantitative injection port 3 connected to the inner cavity, the material (such as carbon dioxide) can enter the inner cavity through the material addition port 2. The piston member is movably arranged in the inner cavity, and the first driving member 7 is drivingly connected to the piston member to drive the piston member to move vertically in the inner cavity so that the material in the inner cavity is discharged through the quantitative injection port 3. With the above structure, the quantitative injection cylinder 1, the piston member and the first driving member 7 cooperate to achieve quantitative injection of materials, improve the practicality of the device, and meet the use requirements.

[0027] This design enables the device to accurately control the injection amount of the material, and at the same time, through the setting of the clamping component, the stability of the device during operation is ensured.

[0028] like Figure 1 As shown, the piston member includes a piston push plate 4 and a piston cylinder 5. The piston push plate 4 is movably arranged in the inner cavity and is sealed with the cavity wall of the inner cavity. The piston cylinder 5 is vertically penetrated in the inner cavity. The lower end of the piston cylinder 5 is connected to the piston push plate 4. The first driving member 7 is drivingly connected to the piston cylinder 5. The first driving member 7 drives the piston cylinder 5 to move vertically, and the piston cylinder 5 drives the piston push plate 4 at its lower end to move, and then the piston push plate 4 is used to discharge the material in the inner cavity through the quantitative injection port 3.

[0029] Through the cooperation of the piston push plate and the piston cylinder, accurate pushing of materials can be achieved, leakage of materials during the injection process is avoided, and the accuracy and efficiency of material injection are improved.

[0030] like Figure 1 As shown, the quantitative injection device also includes a fixed support frame 8 and a transmission screw 6. The lower end of the fixed support frame 8 is connected to the upper end of the quantitative injection cylinder 1. The transmission screw 6 is rotatably arranged on the fixed support frame 8 around its vertical axis. The piston cylinder 5 has a screw hole extending vertically. The transmission screw 6 is inserted into the screw hole and threadedly matched with the piston cylinder 5. The first driving member 7 is drivingly connected to the transmission screw 6. The first driving member 7 drives the transmission screw 6 to rotate, and the transmission screw 6 drives the piston cylinder 5 to move vertically. The threaded transmission method has the advantages of simple structure and easy control of the moving stroke of the piston member, thereby realizing quantitative injection.

[0031] Among them, the design of the transmission screw can convert rotational motion into linear motion, thereby accurately controlling the moving distance of the piston.

[0032] like Figure 1 As shown, the quantitative injection device further includes a first slide bar 9, which is connected to the quantitative injection cylinder 1 and extends vertically, and a limited sliding sleeve 501 is provided on the outer wall of the piston cylinder 5, and the limited sliding sleeve 501 is slidably sleeved on the first slide bar 9 in the vertical direction. The limited sliding sleeve 501 cooperates with the first slide bar 9 to guide the movement of the piston cylinder 5, so that the piston cylinder 5 can only be lifted and lowered vertically, and the stability of the piston cylinder 5 when lifting and lowering can be improved.

[0033] The cooperation between the limiting sliding sleeve and the first sliding rod provides a guide for the movement of the piston, thereby ensuring the stability of the material injection and reducing the material injection error caused by the deviation of the piston.

[0034] like Figures 2 to 4 As shown, the quantitative injection device further includes a movable positioning transverse cylinder 10, which is movably arranged on the quantitative injection cylinder 1 in the vertical direction, and the clamping assembly is arranged on the movable positioning transverse cylinder 10. By movably arranging the movable positioning transverse cylinder 10 on the quantitative injection cylinder 1 in the vertical direction, the height dimension of the clamping assembly can be adjusted, so that the clamping assembly is convenient to be connected with different devices.

[0035] Among them, the design of the movable positioning transverse cylinder enables the device to adapt to equipment of different heights, thereby enhancing the versatility and adaptability of the device.

[0036] like Figure 2 and Figure 4As shown, a fixed connecting plate 14 extending vertically is provided on the outer side wall of the quantitative injection cylinder 1, and a plurality of fixed slots 1501 are provided on the fixed connecting plate 14, and the plurality of fixed slots 1501 are arranged at intervals along the vertical direction. A movable limiting slider 17 is provided on the movable positioning transverse cylinder 10, and the limiting slider 17 can be selectively inserted into one of the fixed slots 1501 to adjust the height dimension of the movable positioning transverse cylinder 10, and then adjust the height dimension of the clamping assembly. This design enables the device to quickly adjust its height, and improves the convenience of operation.

[0037] Specifically, two limit sliders 17 are arranged on the movable positioning transverse cylinder 10, and the two limit sliders 17 are arranged at intervals in the transverse direction. A plurality of fixed slots 1501 are arranged on both sides of the fixed connecting plate 14, and one limit slider 17 can be selectively inserted into one of the fixed slots 1501 on one side of the fixed connecting plate 14, and another limit slider 17 can be selectively inserted into one of the fixed slots 1501 on the other side of the fixed connecting plate 14. The quantitative injection device also includes a reset spring 20, and the two ends of the reset spring 20 are respectively abutted against the two limit sliders 17. With the above structure, the limit slider 17 is simultaneously engaged with the fixed connecting plate 14, which can improve the firmness of the fixed movable positioning transverse cylinder 10.

[0038] The fixed connecting plate 14 is provided with a positioning portion 15, and the fixed slot 1501 is provided on the positioning portion 15. The movable positioning transverse cylinder 10 is provided with a positioning operation block 16, and the limit slider 17 is provided on the positioning operation block 16.

[0039] In this embodiment, the limit slider 17 has a pressing block 1701 and a fixed insert block 1702. The pressing block 1701 is located outside the movable positioning transverse cylinder 10, and the fixed insert block 1702 can be selectively inserted into one of the fixed slots 1501. The user can drive the limit slider 17 to move by pressing the pressing block 1701, and then use the fixed insert block 1702 to insert into the fixed slot 1501 or remove from the fixed slot 1501, which has the advantage of easy operation.

[0040] Specifically, the setting of the reset spring enables the limit slider to automatically reset, thereby improving the efficiency of the operation; the design of the pressing block and the fixed plug block makes the height adjustment operation simpler.

[0041] like Figure 3As shown, the clamping assembly includes two movable clamping plates 12, which are arranged at intervals in the transverse direction. Both movable clamping plates 12 can be movably arranged in the transverse direction on the movable positioning transverse cylinder 10. When the clamping assembly switches from the clamping state to the open state, the two movable clamping plates 12 move away from each other. The clamping operation using the two movable clamping plates 12 has the advantages of simple structure and stable clamping. In addition, this design enables the clamping assembly to adapt to equipment of different widths, thereby enhancing the versatility of the device.

[0042] like Figure 3 As shown, the quantitative injection device also includes a bidirectional screw 18 and a rotating handle 11. The bidirectional screw 18 is rotatably arranged around its transverse axis through the movable positioning transverse cylinder 10. The bidirectional screw 18 has a first thread segment and a second thread segment with opposite thread rotation directions. Two movable clamps 12 are respectively arranged on the first thread segment and the second thread segment. The rotating handle 11 is drivingly connected to the bidirectional screw 18. By rotating the rotating handle 11, the rotating handle 11 can drive the bidirectional screw 18 to rotate, thereby making the two movable clamps 12 approach or move away from each other.

[0043] In addition, the design of the bidirectional screw enables the two movable clamps to move toward or away from each other simultaneously through the rotation of the rotating handle, which simplifies the clamping and releasing operations and improves the convenience and efficiency of the operation.

[0044] In this embodiment, the quantitative injection device further includes a second slide bar 19, which is laterally inserted into the movable positioning transverse cylinder 10, and the two movable clamping plates 12 are sleeved on the second slide bar 19. The second slide bar 19 can limit and guide the movable clamping plates 12, thereby improving the stability of movement and the firmness of clamping of the movable clamping plates 12.

[0045] Specifically, the arrangement of the second slide bar provides a guide for the lateral movement of the movable clamping plate, thereby ensuring the stability and reliability of the clamping assembly.

[0046] In this embodiment, friction-increasing contact pads 13 are provided on the inner sides of the two movable clamping plates 12 , which can increase the friction between the movable clamping plates 12 and the device and improve the fixing firmness.

[0047] The thread design of the bidirectional screw 18 has an anti-reversal structure. The anti-reversal structure can prevent the bidirectional screw from reversing due to external factors during the material injection process, thereby avoiding accidental loosening of the clamping component and enhancing the stability of the device during operation.

[0048] The first driving member 7 includes a motor, which has the advantages of simple structure and low cost. Specifically, the first driving member 7 also includes a reducer, and the motor drives the reducer, which in turn drives the transmission screw. Through the cooperation of the motor and the reducer, the degree of automation of the operation is improved and the labor intensity of manual operation is reduced.

[0049] In addition, the motor drive can also achieve more precise speed control, further improving the accuracy of material injection.

[0050] The quantitative injection device includes a CO 2 Dosed injection device.

[0051] In order to facilitate understanding of the quantitative injection device provided in this embodiment, the following is an explanation in conjunction with the usage of the device:

[0052] (1) The coordinated use of the movable positioning transverse cylinder 10, the rotating handle 11, the movable clamping plate 12, the bidirectional screw 18 and the second slide rod 19 can adjust the distance between the two movable clamping plates 12, facilitate clamping and positioning, and make the quantitative injection cylinder 1 fixedly supported on the top of the device as a whole, so as to facilitate the stable connection between the quantitative injection port 3 and the device, wherein the setting of the friction-increasing contact pad 13 can increase the clamping contact area;

[0053] (2) The setting and coordinated use of the limiting slider 17, the pressing block 1701, the fixed plug block 1702, the return spring 20, the positioning portion 15 and the fixed slot 1501 can manually adjust the plugging state of the fixed plug block 1702 and the fixed slot 1501, so as to facilitate the fixing of the movable positioning transverse cylinder 10 and the fixed connecting plate 14, wherein the positioning portion 15 and the fixed slot 1501 are provided with multiple groups, so that the use height of the movable positioning transverse cylinder 10 can be adjusted;

[0054] (3) The arrangement and coordinated use of the first driving member 7, the transmission screw 6, the piston cylinder 5, the limiting sliding sleeve 501 and the first sliding rod 9 can control the piston push plate 4 to move in the quantitative injection cylinder 1. When the piston push plate 4 moves downward, it can push the CO in the quantitative injection cylinder 1. 2 The injection work is carried out through the quantitative injection port 3 to realize the quantitative injection operation.

[0055] The device provided by this embodiment has the following beneficial effects:

[0056] (1) The quantitative injection device realizes quantitative injection operation by setting and cooperating the first driving member 7, the transmission screw 6, the piston cylinder 5, the limiting sliding sleeve 501 and the first sliding rod 9. The operation is simple and practical, and meets the use requirements.

[0057] (2) The quantitative injection device can adjust the distance between the two movable clamping plates 12 by using the movable positioning transverse cylinder 10, the rotating handle 11, the movable clamping plate 12, the bidirectional screw 18 and the second slide rod 19 to facilitate clamping and positioning;

[0058] (3) The quantitative injection device, through the arrangement and coordinated use of the limit slider 17, the pressing block 1701, the fixed plug block 1702, the return spring 20, the positioning portion 15 and the fixed slot 1501, can adjust the use height of the movable positioning transverse cylinder 10, facilitate the moving clamp 12 to clamp the equipment at different heights, and improve the applicability of the structure.

[0059] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0060] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being only exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0061] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0062] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0063] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only to facilitate the distinction between corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A quantitative injection device, characterized in that: The quantitative injection device comprises: A quantitative injection cylinder (1) having an inner cavity and a material addition port (2) and a quantitative injection port (3) communicated with the inner cavity; A piston member, movably disposed in the inner cavity; A first driving member (7) is drivingly connected to the piston member to drive the piston member to move vertically in the inner cavity; A clamping assembly is arranged on the quantitative injection cylinder (1), and the clamping assembly has a clamping state in which it can be clamped on a device and an open state in which it is separated from the device.

2. The quantitative injection device according to claim 1, characterized in that: The piston member comprises a piston push plate (4) and a piston cylinder (5); the piston push plate (4) is movably arranged in the inner cavity and is sealed with the cavity wall of the inner cavity; the piston cylinder (5) is vertically penetrated in the inner cavity; the lower end of the piston cylinder (5) is connected to the piston push plate (4); and the first driving member (7) is drivingly connected to the piston cylinder (5).

3. The quantitative injection device according to claim 2, characterized in that: The quantitative injection device also includes a fixed support frame (8) and a transmission screw (6), the lower end of the fixed support frame (8) is connected to the upper end of the quantitative injection cylinder (1), the transmission screw (6) is rotatably arranged on the fixed support frame (8) around its vertical axis, the piston cylinder (5) has a screw hole extending in the vertical direction, the transmission screw (6) is inserted into the screw hole and is threadedly matched with the piston cylinder (5), and the first driving member (7) is drivingly connected to the transmission screw (6).

4. The quantitative injection device according to claim 2, characterized in that: The quantitative injection device also includes a first sliding rod (9), which is connected to the quantitative injection cylinder (1) and extends vertically. A limiting sliding sleeve (501) is provided on the outer wall of the piston cylinder (5), and the limiting sliding sleeve (501) is slidably mounted on the first sliding rod (9) in the vertical direction.

5. The quantitative injection device according to claim 1, characterized in that: The quantitative injection device further comprises a movable positioning transverse cylinder (10), wherein the movable positioning transverse cylinder (10) is movably arranged on the quantitative injection cylinder (1) in the vertical direction, and the clamping assembly is arranged on the movable positioning transverse cylinder (10).

6. The quantitative injection device according to claim 5, characterized in that: A fixed connecting plate (14) extending vertically is arranged on the outer side wall of the quantitative injection cylinder (1), and a plurality of fixed slots (1501) are arranged on the fixed connecting plate (14). The plurality of fixed slots (1501) are arranged at intervals along the vertical direction. A movable limiting slider (17) is arranged on the movable positioning transverse cylinder (10), and the limiting slider (17) can be selectively inserted into one of the fixed slots (1501).

7. The quantitative injection device according to claim 6, characterized in that: The movable positioning transverse cylinder (10) is provided with two limiting sliders (17), and the two limiting sliders (17) are arranged at intervals in the transverse direction. A plurality of fixing slots (1501) are provided on both sides of the fixed connecting plate (14), and one of the limiting sliders (17) can be selectively inserted into one of the fixing slots (1501) on one side of the fixed connecting plate (14), and the other limiting slider (17) can be selectively inserted into one of the fixing slots (1501) on the other side of the fixed connecting plate (14). The quantitative injection device also includes a reset spring (20), and the two ends of the reset spring (20) are respectively in contact with the two limiting sliders (17); and / or, The limiting sliding block (17) comprises a pressing block (1701) and a fixed insert block (1702), wherein the pressing block (1701) is located outside the movable positioning transverse cylinder (10), and the fixed insert block (1702) can be selectively inserted into one of the fixed slots (1501).

8. The quantitative injection device according to claim 5, characterized in that: The clamping assembly comprises two movable clamping plates (12), the two movable clamping plates (12) are arranged at intervals in the transverse direction, and the two movable clamping plates (12) can be movably arranged in the transverse direction on the movable positioning transverse cylinder (10). During the process of the clamping assembly switching from the clamping state to the open state, the two movable clamping plates (12) move away from each other.

9. The quantitative injection device according to claim 8, characterized in that: The quantitative injection device also includes a bidirectional screw (18) and a rotating handle (11). The bidirectional screw (18) is rotatably arranged around its transverse axis and penetrates the movable positioning transverse cylinder (10). The bidirectional screw (18) has a first thread segment and a second thread segment with opposite thread rotation directions. The two movable clamps (12) are respectively arranged on the first thread segment and the second thread segment. The rotating handle (11) is drivingly connected to the bidirectional screw (18).

10. The quantitative injection device according to claim 8, characterized in that: The quantitative injection device also includes a second slide bar (19), which is laterally penetrated through the movable positioning transverse cylinder (10), and the two movable clamping plates (12) are both sleeved on the second slide bar (19).

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