Cylinder body structure and hydraulic driving pump thereof

Abstract

The utility model discloses a cylinder body structure and a hydraulic driving pump thereof. The cylinder body structure comprises a movable cylinder, sealing rings, end covers and connecting rods, the end covers are arranged at the two ends of the movable cylinder for connection, the end of the outer wall of the movable cylinder is sealed through the sealing rings, and the end covers and the sealing rings at the two ends of the movable cylinder are tensioned and fixed through the connecting rods. According to the hydraulic driving pump, the working cylinder of the hydraulic driving pump is of the cylinder body structure. The problems that in the prior art, a cylinder body structure used by a hydraulic driving pump is unreasonable in structural design, the service life of a piston is prone to being seriously shortened, acting of the piston is reduced, and output power is reduced are solved. According to the cylinder body structure and the hydraulic driving pump thereof, the structural design is reasonable, and through the design of the movable cylinder, shaking of the piston can be counteracted, limitation to the piston is reduced, and smooth output power of the piston is guaranteed. Furthermore, the service life of the piston is prolonged, the service life of the whole hydraulic driving pump is further prolonged, the maintenance frequency is reduced, and the construction efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cylinder structure design of a horizontal drive pump, in particular to a cylinder structure and a hydraulic drive pump thereof. Background Art

[0002] In the building materials, chemical, food, environmental protection, petroleum and other industries, with the continuous improvement of industrialization and the requirements of assembly line operations, the stirred mud must be transported to the next work site. In view of the requirements of speed, efficiency and hygiene, using a mud pump to complete this process is the most ideal choice.

[0003] Horizontal slurry pump is a kind of equipment used in industrial, agricultural and urban water systems, which is roughly divided into two parts: hydraulic end and power end. The pump has a self-priming function, and the self-priming height is usually between 4 and 8 meters. It has a simple structure, low failure rate and easy maintenance.

[0004] In the prior art, the working cylinder with a driving function will produce a certain swing of the piston during the working process due to the unstable force. In the prior art, the cylinder body of the reciprocating piston is a fixed structure, and the reciprocating motion of the piston can only be satisfied by limiting the movement of the piston, which consumes a lot of energy. In addition, the piston is severely worn in the process of the cylinder body limiting the piston, which greatly shortens the service life of the piston.

[0005] It can be seen that in the prior art, the working cylinder structure design used in the hydraulic drive pump is unreasonable, which easily leads to a serious shortening of the service life of the piston, and reduces the work done by the piston and the output power. Utility Model Content

[0006] In view of this, the main purpose of the utility model is to provide a cylinder structure and a hydraulic drive pump with a reasonable structural design, which reduces restrictions on the piston, ensures smooth output power of the piston, extends the service life of the piston, and further extends the service life of the entire hydraulic drive pump.

[0007] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0008] A cylinder structure comprises: a movable cylinder, a sealing ring, an end cover and a connecting rod, wherein the two ends of the movable cylinder are connected by the end covers, the ends of the outer wall of the movable cylinder are sealed by the sealing ring, and the end covers and the sealing rings at both ends of the movable cylinder are tightened and fixed by the connecting rod.

[0009] In a preferred embodiment, outer sealing grooves are formed on the outer walls at both ends of the movable cylinder, and inner sealing grooves are formed on the inner wall of the sealing ring near the end of the movable cylinder, and sealing elements are provided in the outer sealing grooves and the inner sealing grooves.

[0010] In a preferred embodiment, the outer sealing groove and the inner sealing groove are open on a side away from the middle of the movable cylinder, the inner wall of the end cover presses the opening, and the outer sealing groove and the inner sealing groove are aligned on a side close to the middle of the movable cylinder.

[0011] In a preferred embodiment, one or more seals are provided, the thickness of one or more seals is the same as the width of the outer sealing groove and / or the inner sealing groove, and the width of the seal is the same as the sum of the depths of the outer sealing groove and the inner sealing groove.

[0012] In a preferred embodiment, a sealing protrusion is provided on the inner wall of the end cover, and the sealing protrusion is disc-shaped. The sealing protrusion extends into the end of the movable cylinder, and a first sealing ring is provided on the edge of the sealing protrusion. A first sealing ring is provided inside the first sealing ring, and a clearance is fitted between the sealing protrusion and the movable cylinder.

[0013] In a preferred embodiment, a movable transition step is provided at the end of the inner wall of the movable cylinder.

[0014] In a preferred embodiment, a second sealing ring is provided on the inner wall of the end cover at an outer side of the sealing protrusion, and a second sealing ring is provided inside the second sealing ring.

[0015] In a preferred embodiment, the inner side of the second sealing ring exceeds the movable transition step, and the outer side of the movable transition step exceeds the lower bottom surface of the outer sealing groove.

[0016] In a preferred embodiment, the end cover and the sealing ring edge are respectively provided with a plurality of connection holes, and the two ends of the connecting rod are respectively extended into the connection holes, so that the end cover and the sealing ring are pressed and sealed at the two ends of the movable cylinder;

[0017] In a preferred embodiment, both ends of the connecting rod are step rods, the ends of the connecting rod are provided with external threads, the step rod and the connecting hole are limited and supported, and the external threads extend out of the connecting hole to be fixedly connected with a nut.

[0018] A hydraulically driven pump, the cylinder structure of the hydraulically driven pump is the above-mentioned cylinder structure.

[0019] The cylinder structure and hydraulic drive pump of the utility model have the following beneficial effects:

[0020] The cylinder structure comprises: a movable cylinder, a sealing ring, an end cover and a connecting rod, the two ends of the movable cylinder are connected by the end covers, the ends of the outer wall of the movable cylinder are sealed by the sealing ring, and the end covers and the sealing rings at both ends of the movable cylinder are tightened and fixed by the connecting rod. The hydraulic drive pump, the working cylinder of the hydraulic drive pump is the above-mentioned cylinder structure.

[0021] The invention solves the problem in the prior art that the working cylinder structure design used in the hydraulic drive pump is unreasonable, which easily leads to a serious shortening of the service life of the piston, reduces the work done by the piston, and reduces the output power.

[0022] The cylinder structure and its hydraulic drive pump have reasonable structural design. Through the design of the movable cylinder, the sway of the piston can be offset, the restriction on the piston can be reduced, and the smooth output power of the piston can be ensured. Furthermore, the service life of the piston is extended, and then the service life of the entire hydraulic drive pump is extended, the number of maintenance times is reduced, and the construction efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of a cylinder structure according to an embodiment of the present disclosure;

[0025] Figure 2 for Figure 1 A cross-sectional view of a cylinder structure according to an embodiment of the present disclosure is shown;

[0026] Figure 3 for Figure 2 A partial enlarged view of A of a cylinder structure according to an embodiment of the present disclosure is shown;

[0027] Figure 4 It is a cross-sectional view of a movable cylinder of a cylinder structure according to one embodiment of the present disclosure.

[0028]

Main component symbol description

[0029] 1. Movable cylinder;

[0030] 11. External sealing groove; 12. Movable transition step;

[0031] 2. Sealing ring;

[0032] 21. Inner sealing groove;

[0033] 3. End cap;

[0034] 31. Sealing protrusion; 32. First sealing ring; 33. Second sealing ring;

[0035] 4. Connecting rod;

[0036] 5. Connection hole. DETAILED DESCRIPTION

[0037] The cylinder structure and the hydraulic drive pump of the present invention are further described in detail below in conjunction with the accompanying drawings and embodiments of the present invention.

[0038] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] 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.

[0040] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0041] 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.

[0042] like Figure 1-Figure 4As shown, the cylinder structure includes: a movable cylinder 1 that can move within a certain range, a sealing ring 2 that can seal the end of the movable cylinder under the premise of meeting certain movement requirements, an end cover 3 that supports the end cover of the movable cylinder 1, and a connecting rod 4 that connects and fixes the end cover 3. The two ends of the movable cylinder 1 are connected by the end cover 3, the end of the outer wall of the movable cylinder 1 is sealed by the sealing ring 2, and the end covers 3 and the sealing ring 2 at both ends of the movable cylinder 1 are tightened and fixed by the connecting rod 4. A certain gap is left between the movable cylinder 1 and the sealing ring 2 to meet the movement of the movable cylinder 1, and the sealing effect of the end can be ensured by the sealing ring 2.

[0043] The piston in the movable cylinder 1 that telescopes can swing within a certain range, thereby ensuring the service life of the piston of the large-kilometer hydraulic drive pump.

[0044] In order to improve the sealing effect, outer sealing grooves 11 are provided on the outer walls at both ends of the movable cylinder 1, and inner sealing grooves 21 are provided on the inner wall of the sealing ring 2 near the end of the movable cylinder 1. Sealing members are provided in the outer sealing grooves 11 and the inner sealing grooves 21. The sealing members have a certain elasticity, and can be compressed during the slight swinging of the movable cylinder 1, so as to ensure the sealing and meet the swinging requirements.

[0045] In order to increase the sealing surface area of ​​the seal, the outer sealing groove 11 and the inner sealing groove 21 are open at the side away from the middle of the movable cylinder 1, and the inner wall of the end cover 3 presses the opening, and the outer sealing groove 11 and the inner sealing groove 21 are aligned at the side close to the middle of the movable cylinder 1. The seal can press and seal the inner wall of the end cover 3, further improving the sealing effect.

[0046] Furthermore, in order to facilitate the swing of the movable cylinder 1 and avoid interference with the sealing ring 2, the sealing member can not only meet the sealing requirements, but also increase the swing space of the movable cylinder 1. If there is a certain interference on the inner side of the inner sealing groove 21, the thickness of the inner sealing groove 21 can be reduced to avoid the possibility of interference.

[0047] In order to ensure the sealing effect of the seal, one or more seals are provided, and the thickness of the one or more seals is the same as the width of the outer sealing groove 11 and / or the inner sealing groove 21, and the width of the seal is the same as the sum of the depths of the outer sealing groove 11 and the inner sealing groove 21. It is not only ensured that the seal can completely fill the outer sealing groove 11 and the inner sealing groove 21. In the depth direction, each seal is completely filled, which can improve the sealing effect.

[0048] Here, the width of the seal is the dimension of the seal in the radial direction.

[0049] The thickness of the seal is the dimension of the seal in the axial direction.

[0050] In order to improve the support and sealing effect of the end 3 on the movable cylinder 1. The inner wall of the end cover 3 is provided with a sealing protrusion 31, which is disc-shaped and extends into the end of the movable cylinder 1. A first sealing ring 32 is provided on the edge of the sealing protrusion 31, and a first sealing ring is provided inside the first sealing ring 32. The sealing protrusion 31 and the movable cylinder 1 are fitted with a clearance. The sealing protrusion 31 extends into a certain size, which can support the movable cylinder 1 and ensure the working stability of the movable cylinder 1.

[0051] In order to reduce the possibility of interference between the movable cylinder 1 and the inner wall end of the movable cylinder 1, a movable transition step 12 is provided to facilitate the movable cylinder 1 to extend into the sealing protrusion 31 and reduce the possibility of interference between the movable cylinder 1 and the inner wall of the end cover 3.

[0052] In order to improve the sealing effect between the end cover 3 and the movable cylinder 1, a second sealing ring 33 is provided on the inner wall of the end cover 3 outside the sealing protrusion 31, and a second sealing ring is provided inside the second sealing ring 33.

[0053] In order to reduce the possibility of interference of the movable cylinder 1, the inner side of the second sealing ring 33 exceeds the movable transition step 12, and the outer side of the movable transition step 12 exceeds the lower bottom surface of the outer sealing groove 11. The movable cylinder 1 can compress the second sealing ring during the swinging process to further reduce the possibility of interference.

[0054] In order to meet the conduction connection of a connecting rod 4, a plurality of connecting holes 5 are respectively opened on the edge of the end cover 3 and the sealing ring 2, and the two ends of the connecting rod 4 are respectively extended into the connecting holes 5, and the end cover 3 and the sealing ring 2 are pressed and sealed at the two ends of the movable cylinder 1;

[0055] In order to satisfy the compression and sealing function of the end cover 3 and the sealing ring 2, the two ends of the connecting rod 4 are step rods, and the ends of the connecting rod 4 are provided with external threads. The step rod and the connecting hole 5 are limited and supported, and the external threads extend out of the connecting hole 5 to fix the nut connection. The step rod can support the sealing ring 2, so that the end cover 3 can be compressed by the nut, thereby ensuring the compression and sealing between the end cover 3 and the sealing ring 2.

[0056] A hydraulically driven pump, the cylinder structure of the hydraulically driven pump is the above-mentioned cylinder structure.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A cylinder structure, characterized in that: include: A movable cylinder (1), a sealing ring (2), an end cover (3) and a connecting rod (4); the end covers (3) are arranged at both ends of the movable cylinder (1) for connection; the end of the outer wall of the movable cylinder (1) is sealed by the sealing ring (2); and the end covers (3) and the sealing ring (2) at both ends of the movable cylinder (1) are tightened and fixed by the connecting rod (4).

2. The cylinder structure according to claim 1, characterized in that: The outer walls at both ends of the movable cylinder (1) are provided with outer sealing grooves (11), and the inner wall of the sealing ring (2) is provided with an inner sealing groove (21) on one side close to the end of the movable cylinder (1). Sealing elements are provided in the outer sealing groove (11) and the inner sealing groove (21).

3. The cylinder structure according to claim 2, characterized in that: The outer sealing groove (11) and the inner sealing groove (21) are open on a side away from the middle of the movable cylinder (1), the inner wall of the end cover (3) presses the opening, and the outer sealing groove (11) and the inner sealing groove (21) are aligned on a side close to the middle of the movable cylinder (1).

4. The cylinder structure according to claim 3, characterized in that: One or more seals are provided, the thickness of one or more seals is the same as the width of the outer sealing groove (11) and / or the inner sealing groove (21), and the width of the seal is the same as the sum of the depths of the outer sealing groove (11) and the inner sealing groove (21).

5. The cylinder structure according to any one of claims 2 to 4, characterized in that: The inner wall of the end cover (3) is provided with a sealing protrusion (31), the sealing protrusion (31) is disc-shaped, the sealing protrusion (31) extends into the end of the movable cylinder (1), a first sealing ring (32) is provided on the edge of the sealing protrusion (31), a first sealing ring is provided inside the first sealing ring (32), and a clearance fit is formed between the sealing protrusion (31) and the movable cylinder (1).

6. The cylinder structure according to claim 5, characterized in that: A movable transition step (12) is provided at the end of the inner wall of the movable cylinder (1).

7. The cylinder structure according to claim 6, characterized in that: A second sealing ring (33) is provided on the inner wall of the end cover (3) at the outer side of the sealing protrusion (31), and a second sealing ring is provided inside the second sealing ring (33).

8. The cylinder structure according to claim 7, characterized in that: The inner side of the second sealing ring (33) exceeds the movable transition step (12), and the outer side of the movable transition step (12) exceeds the lower bottom surface of the outer sealing groove (11).

9. The cylinder structure according to any one of claims 1 to 4, characterized in that: The edges of the end cover (3) and the sealing ring (2) are respectively provided with a plurality of connection holes (5), and the two ends of the connecting rod (4) are respectively extended into the connection holes (5) to press and seal the end cover (3) and the sealing ring (2) at the two ends of the movable cylinder (1); The two ends of the connecting rod (4) are stepped rods, and the ends of the connecting rod (4) are provided with external threads. The stepped rod and the connecting hole (5) are limitedly supported, and the external threads extend out of the connecting hole (5) to be fixedly connected with a nut.

10. A hydraulically driven pump, characterized in that: The working cylinder of the hydraulic drive pump is a cylinder structure as described in any one of claims 1-9.

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