Piston for slurry pump working cylinder and slurry pump thereof

Abstract

The utility model discloses a piston for a slurry pump working cylinder and a slurry pump thereof. According to the piston for the slurry pump working cylinder, the sealing ring is pressed and fixed between the pressing piece and the piston head; the diameter of the pressing piece is smaller than that of the piston head, and the maximum diameter of the sealing ring is larger than that of the piston head. According to the slurry pump, the piston in the working cylinder of the slurry pump is the piston used for the working cylinder of the slurry pump. In the prior art, a piston used by a slurry pump is unreasonable in structural design, the service life of the piston is seriously influenced, the whole slurry pump needs to be shut down for maintenance in the using process, and the maintenance cost is increased. According to the piston used for the slurry pump working cylinder and the slurry pump thereof, the piston head is reasonable in structural design, and the sealing ring mainly works in a sealing mode in the process that the piston head pushes the slurry pump; in the return stroke process of the piston head, the sealing effect of the sealing ring is reduced, and therefore the service life of the sealing ring is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of structural design of structural parts of a mud pump, in particular to a piston used in a working cylinder of a mud pump and a mud 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] However, in the prior art, the piston of the working cylinder of the mud pump is greatly worn due to the effect of the mud during long-term use, which seriously reduces the service life of the piston. In the prior art, the sealing ring of the piston is in a fixed state, and a clamping force is applied to both sides of the sealing ring to ensure the operation of the sealing ring, resulting in the sealing ring being subjected to the same friction of the inner wall of the working cylinder during the process of pushing the mud or during the return process, resulting in serious wear of the sealing ring. This greatly shortens the service life of the piston and increases the cost of use.

[0005] It can be seen that in the prior art, the piston structure design used in the mud pump is unreasonable, which seriously affects the service life of the piston, causing the entire mud pump to need to be shut down for maintenance during use, and increasing the maintenance cost. Utility Model Content

[0006] In view of this, the main purpose of the utility model is to provide a piston for a mud pump working cylinder and a mud pump thereof, which can reduce the wear of the sealing ring, extend the service life of the sealing ring, and thus ensure the service life of the piston.

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

[0008] A piston for a mud pump working cylinder, comprising: a pressing piece, a piston head and a sealing ring, wherein the sealing ring is pressed and fixed between the pressing piece and the piston head;

[0009] In a preferred embodiment, the diameter of the pressing member is smaller than the diameter of the piston head, and the maximum diameter of the sealing ring is larger than the diameter of the piston head.

[0010] In a preferred embodiment, a clamping ring groove is provided on one side of the edge of the clamping piece close to the piston head, a piston ring groove is provided on one side of the edge of the piston head close to the clamping piece, the sealing ring is clamped and fixedly connected inside the clamping ring groove and the piston ring groove, and the inner diameter of the sealing ring is the same as the diameter of the clamping ring groove and the diameter of the piston ring groove;

[0011] In a preferred embodiment, the thickness of the sealing ring is greater than the sum of the depths of the piston ring groove and the pressure ring groove.

[0012] In a preferred embodiment, an inclined surface is provided on the edge of the clamping ring groove, and the sealing ring extends out to the outer wall of the edge of the clamping member.

[0013] In a preferred embodiment, the sealing ring extends out of one side of the edge of the pressing member, and a transition surface is provided where the sealing ring extends out of the edge of the pressing member, and the transition surface and the inclined surface are closely supported.

[0014] In a preferred embodiment, one side of the edge of the sealing ring is flush with the edge of the piston head, and the side of the edge of the sealing ring close to the pressing piece protrudes outward.

[0015] In a preferred embodiment, a set number of support pads are connected between the pressing member and the piston head;

[0016] In a preferred embodiment, the total thickness of a set number of the support pads, the depth of the pressure ring groove and the depth of the piston ring groove is the same as the thickness of the sealing ring.

[0017] In a preferred embodiment, the set number of the support pads is greater than or equal to 1.

[0018] In a preferred embodiment, a positioning column is protruded from the center of one side of the pressing member close to the piston head, a positioning hole is opened in the center of the piston head, and the positioning column extends into the positioning hole for limiting position;

[0019] In a preferred embodiment, it also includes: a connecting head, a threaded hole is opened in the center of the connecting head, and the threaded hole is threadedly connected to the piston rod; a connecting hole is opened through the edge of the connecting head, a stepped hole is opened through the piston head, and a fixing screw is connected through the stepped hole and the connecting hole.

[0020] In a preferred embodiment, it further comprises: an anti-collision platform, a fixing hole is opened through the anti-collision platform, and connecting bolts are arranged through the fixing hole and the connecting hole to fix the anti-collision platform.

[0021] A mud pump, wherein the internal piston of the working cylinder of the mud pump is the above-mentioned piston used for the working cylinder of the mud pump.

[0022] The utility model discloses a piston used in a mud pump working cylinder and a mud pump thereof, which has the following beneficial effects:

[0023] The piston used in the working cylinder of the mud pump comprises: a pressing piece, a piston head and a sealing ring, wherein the sealing ring is pressed and fixed between the pressing piece and the piston head; the diameter of the pressing piece is smaller than the diameter of the piston head, and the maximum diameter of the sealing ring is larger than the diameter of the piston head. The piston inside the working cylinder of the mud pump is the above-mentioned piston used in the working cylinder of the mud pump.

[0024] In the prior art, the piston structure design used in the mud pump is unreasonable, which seriously affects the service life of the piston, causing the entire mud pump to need to be shut down for maintenance during use, and increasing the maintenance cost.

[0025] The piston used in the working cylinder of the mud pump and the mud pump thereof can be reasonably designed through the piston head structure, so that the sealing ring can mainly perform sealing work when the piston head pushes the mud pump; when the piston head returns, the sealing effect of the sealing ring is reduced, thereby extending the service life of the sealing ring. Furthermore, by adjusting the distance of the sealing ring, the sealing ring can be adjusted and tightened when wear occurs, thereby meeting the continued use of the sealing ring and further extending the service life of the entire piston. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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.

[0027] Figure 1 A cross-sectional view of a piston used in a mud pump working cylinder according to an embodiment of the present disclosure;

[0028] Figure 2 for Figure 1 A cross-sectional view of a pressing member used for a piston in a mud pump working cylinder according to an embodiment of the present disclosure is shown;

[0029] Figure 3 for Figure 1 A cross-sectional view of a piston head of a piston used in a mud pump working cylinder according to an embodiment of the present disclosure is shown;

[0030] Figure 4 for Figure 1 A cross-sectional view of a sealing ring used for a piston in a mud pump working cylinder according to an embodiment of the present disclosure is shown.

[0031]

Main component symbol description

[0032] 1. Clamping parts;

[0033] 11. Clamping ring groove; 12. Inclined surface; 13. Positioning column;

[0034] 2. Piston head;

[0035] 21. Piston ring groove; 22. Positioning hole; 23. Step hole;

[0036] 3. Sealing ring;

[0037] 31. Transition surface;

[0038] 4. Support pad;

[0039] 5. Connector;

[0040] 51. Connection hole;

[0041] 6. Piston rod;

[0042] 7. Anti-collision platform;

[0043] 71. Fixing holes. DETAILED DESCRIPTION

[0044] The following is a further detailed description of the piston used for the working cylinder of a mud pump and the mud pump of the utility model in conjunction with the accompanying drawings and the embodiments of the utility model.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] like Figure 1-Figure 4 As shown, the piston used in the mud pump working cylinder includes: a clamping piece 1 for clamping and fixing the sealing ring 3, a piston head 2 for supporting the sealing ring 3 to ensure the sealing effect and push the mud, and the sealing ring 3 for cooperating with the inner wall of the working cylinder for sealing, and the sealing ring 3 is clamped and fixed between the clamping piece 1 and the piston head 2.

[0050] In order to increase the working area of ​​the sealing ring 3 and improve the sealing effect on the inner wall of the working cylinder, the diameter of the clamping member 1 is smaller than the diameter of the piston head 2, and the maximum diameter of the sealing ring 3 is larger than the diameter of the piston head 2. When the piston head 2 pulls the sealing ring 3, the sealing ring 3 can appropriately shrink toward the outer wall of the clamping member 1 to improve the dynamic effect; when the piston head 2 pushes the sealing ring 3, the piston head 2 has a larger diameter, which can push the sealing ring 3 more stably, thereby realizing the mud pushing effect inside the working cylinder.

[0051] In order to improve the sealing effect of the sealing ring 3, especially the compression and fixing effect of the sealing ring 3, and ensure the working stability of the sealing ring 3, a compression ring groove 11 is provided on the side of the edge of the compression piece 1 close to the piston head 2, and a piston ring groove 21 is provided on the side of the edge of the piston head 2 close to the compression piece 1. The sealing ring 3 is compressed and fixedly connected inside the compression ring groove 11 and the piston ring groove 21. The inner diameter of the sealing ring 3 is the same as the diameter of the compression ring groove 11 and the diameter of the piston ring groove 21. The compression ring groove 11 and the piston ring groove 21 support the sealing ring 3, so that the sealing ring 3 is guaranteed to extend outward and the sealing effect is guaranteed.

[0052] In order to adjust the spacing between the clamping ring groove 11 and the piston ring groove 21 during use, the clamping force of the sealing ring 3 can be adjusted, thereby adjusting the size of the clamping ring groove 11 and the piston ring groove 21 to compress and extrude the sealing ring 3. The thickness of the sealing ring 3 is greater than the sum of the depths of the piston ring groove 11 and the clamping ring groove 21 (the depth direction is the axial direction of the sealing ring 3). As the sealing ring 3 wears, part of the sealing ring 3 can be squeezed out by adjusting the spacing between the clamping ring groove 11 and the piston ring groove 21, so as to meet the sealing requirements and extend the service life of the sealing ring 3.

[0053] In order to ensure the compression requirements of the sealing ring 3, the deformation range of the sealing ring 3 can be increased to improve the sealing effect of the sealing ring 3. The edge of the compression ring groove 11 is provided with an inclined surface 12, and the sealing ring 3 extends to the outer wall of the edge of the compression member 1. When the compression member 1 compresses the sealing ring 3, the sealing ring 3 can be squeezed and extended along the inclined surface 12 to ensure the working area of ​​the sealing part.

[0054] The sealing ring 3 is adapted to the structure of the pressing member 1 to ensure the pressing and fixing effect. The sealing ring 3 extends out of one side of the edge of the pressing member 1. A transition surface 31 is provided at the edge of the pressing member 1. The transition surface 31 and the inclined surface 12 are closely supported.

[0055] In order to smoothly transition with the piston head 2, one side of the edge of the sealing ring 3 is flush with the edge of the piston head 2; in order to improve the sealing effect of the sealing ring 3, the side of the edge of the sealing ring 3 close to the pressing piece 1 extends outward. The size of the sealing ring 3 increases from one side of the piston head 2 to the other side of the pressing piece 1, which improves the sealing effect and further satisfies the sealing of the piston during the working process of squeezing mud. During the return process, it can shrink appropriately to reduce damage to the sealing ring.

[0056] In order to meet the long-term use of the sealing ring 3, the sealing ring 3 is worn due to the long-term wear between the sealing ring 3 and the inner wall of the working cylinder. In order to increase the service life of the sealing ring 3 and ensure the sealing effect. A set number of support pads 4 are connected between the clamping member 1 and the piston head 2; when the sealing ring 3 is worn, the support pads 4 can be removed, and then the sealing ring 3 can be pressed by the clamping member 1 to squeeze the sealing ring 4 out to a certain size to meet the sealing effect.

[0057] In order to ensure that the seal ring 3 is not compressed in the initial state and to ensure that the seal ring 3 is compressed and extended after wear in the later stage, the total thickness of the support pads 4, the depth of the compression ring groove 11 and the depth of the piston ring groove 21 are set to be the same as the thickness of the seal ring 3. In the initial state, the seal ring 3 is only fixed to ensure the working requirements of the seal ring 3.

[0058] In order to increase the number of adjustment times of the support pad 4, meet the small single adjustment range, and avoid the defect of excessive extension of the single compression seal ring 3, the set number of the support pad 4 is greater than or equal to 1. Preferably, the number of the support pads 4 is set to 3-5.

[0059] In order to improve the fixing stability of the pressing piece 1 , a positioning column 13 is protruded from the center of one side of the pressing piece 1 close to the piston head 2 , and a positioning hole 22 is opened in the center of the piston head 2 , and the positioning column 13 extends into the positioning hole 22 for limiting position.

[0060] In order to facilitate the connection with the piston rod 6 and ensure the connection strength with the piston rod 6, it also includes: a connector 5, a threaded hole is opened in the center of the connector 5, and the threaded hole is threadedly connected with the piston rod 6; a connection hole 51 is opened through the edge of the connector 5, and a stepped hole 23 is opened through the piston head 2, and a fixing screw is connected through the stepped hole 23 and the connection hole 51. The connector and the piston head 2 are fixedly connected by the fixing screw, so that the piston rod drives the piston head 2.

[0061] In order to avoid the connection head 5 from colliding with the inner wall of the working cylinder, especially during the debugging process, the control system is not accurate and collision is easy to occur. It also includes: an anti-collision platform 7, a fixing hole 71 is opened through the anti-collision platform 7, and a connecting bolt is set through the fixing hole 71 and the connecting hole 51 to fix the anti-collision platform 7.

[0062] The utility model also discloses a mud pump. The internal piston of the working cylinder of the mud pump is the above-mentioned piston used for the working cylinder of the mud pump.

[0063] 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 piston for a mud pump working cylinder, characterized in that: include: A pressing piece (1), a piston head (2) and a sealing ring (3), wherein the sealing ring (3) is pressed and fixed between the pressing piece (1) and the piston head (2); The diameter of the pressing piece (1) is smaller than the diameter of the piston head (2), and the maximum diameter of the sealing ring (3) is larger than the diameter of the piston head (2).

2. The piston for a mud pump working cylinder according to claim 1, characterized in that: A clamping ring groove (11) is provided on the side of the edge of the clamping piece (1) close to the piston head (2), and a piston ring groove (21) is provided on the side of the edge of the piston head (2) close to the clamping piece (1). The sealing ring (3) is clamped and fixedly connected inside the clamping ring groove (11) and the piston ring groove (21), and the inner diameter of the sealing ring (3) is the same as the diameter of the clamping ring groove (11) and the diameter of the piston ring groove (21); The thickness of the sealing ring (3) is greater than the sum of the depths of the piston ring groove (21) and the clamping ring groove (11).

3. The piston for a mud pump working cylinder according to claim 2, characterized in that: The edge of the clamping ring groove (11) is provided with an inclined surface (12), and the sealing ring (3) extends out to the outer wall of the edge of the clamping member (1).

4. The piston for a mud pump working cylinder according to claim 3, characterized in that: The sealing ring (3) extends out of one side of the edge of the pressing piece (1), and a transition surface (31) is provided at the edge of the pressing piece (1) where the sealing ring (3) extends out, and the transition surface (31) and the inclined surface (12) are closely supported.

5. The piston for a mud pump working cylinder according to claim 3, characterized in that: One side of the edge of the sealing ring (3) is flush with the edge of the piston head (2), and the side of the edge of the sealing ring (3) close to the pressing piece (1) protrudes outwards.

6. The piston for a mud pump working cylinder according to claim 2, characterized in that: A set number of support pads (4) are connected between the pressing member (1) and the piston head (2); The sum of the total thickness of a set number of support pads (4), the depth of the clamping ring groove (11) and the depth of the piston ring groove (21) is the same as the thickness of the sealing ring (3).

7. The piston for a mud pump working cylinder according to claim 6, characterized in that: The set number of the support pads (4) is greater than or equal to 1.

8. The piston for a mud pump working cylinder according to any one of claims 1 to 7, characterized in that: A positioning column (13) is protruding from the center of one side of the pressing member (1) close to the piston head (2), a positioning hole (22) is opened in the center of the piston head (2), and the positioning column (13) extends into the positioning hole (22) for limiting position; It also comprises: a connecting head (5), a threaded hole is provided at the center of the connecting head (5), and the threaded hole is threadedly connected to the piston rod (6); a connecting hole (51) is provided through the edge of the connecting head (5), a stepped hole (23) is provided through the piston head (2), and a fixing screw is connected through the stepped hole (23) and the connecting hole (51).

9. The piston for a mud pump working cylinder according to claim 8, characterized in that: Also includes: The anti-collision platform (7) has a fixing hole (71) extending through the anti-collision platform (7), and a connecting bolt is arranged through the fixing hole (71) and the connecting hole (51) to fix the anti-collision platform (7).

10. A mud pump, characterized in that: The internal piston of the working cylinder of the mud pump is the piston used for the working cylinder of the mud pump as claimed in any one of claims 1 to 9.

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