CN212202378U

CN212202378U - Slurry pump

Info

Publication number: CN212202378U
Application number: CN202020843474.3U
Authority: CN
Inventors: 罗继虎
Original assignee: Xianyang Xinporcelain Pump Co ltd
Current assignee: Xianyang Xinporcelain Pump Co ltd
Priority date: 2020-05-19
Filing date: 2020-05-19
Publication date: 2020-12-22
Anticipated expiration: 2030-05-19

Abstract

The utility model discloses a slurry pump is equipped with ceramic plunger cooling and lubricating device at the upper end of the pump body, and ceramic plunger cooling and lubricating device cover is established at the ceramic plunger outer wall of ceramic plunger device. The sealing ring is fixedly connected to the upper end part of the pump body, and a water sealing rubber ring is arranged between the inside of the sealing ring and the ceramic plunger in a sealing manner, so that the inner cavity of the pump body is sealed and isolated by the water sealing rubber ring; the sealing ring upside can be dismantled and be connected with into water ring, and cooling ring chamber and sealed ring chamber have been seted up to one side that the ring that intakes is close to ceramic plunger, run through and set up water inlet and delivery port between cooling ring chamber and the outside of intaking ring, be equipped with the water seal sealing washer at sealed ring intracavity portion. The mud pump has reasonable structural design and low additional cost; through to ceramic plunger cooling and lubrication device structural design, guarantee cooling water circulative cooling and lubrication action, can concentrate moreover and collect the discharge, avoid the pollution to slush pump service environment, can realize the recycling of cooling water moreover, further reach the requirement of environmental protection.

Description

Slurry pump

Technical Field

The utility model relates to a device of long distance transport mud or for spray tower, pressure filter provide mud especially relates to a mud pump.

Background

In the industries of building materials, chemical industry, food, environmental protection, petroleum and the like, along with the continuous improvement of industrialization and the requirement of flow operation, the stirred slurry must be conveyed to the next working position, and the process is the most ideal choice to be completed by utilizing a slurry pump in view of the requirements of factors such as rapidness, high efficiency, sanitation and the like.

In the prior art, the common mud pumps of the same type are typically those of the YB series. For example: in the utility model patent, the patent name is: the variable acid-resistant and corrosion-resistant slurry pump has the following authorization notice number: CN 2463559Y; and utility model patent, the patent name is: the high-pressure large-flow hydraulic ceramic plunger pump has the following authorization notice number: CN 201176912Y; the slurry pump described does not have a reasonable cooling structure for the plunger, especially for the ceramic plunger, and the plunger is cooled and lubricated by supplying cooling water to the end of the plunger in the prior art. However, the cooling water after use does not have a reasonable structure for collection, and the cooling water is left along the mud pump to seriously pollute the using environment of the mud pump. And the cooling water is left along the outside of the slurry pump for a long time, so that the use effect of the slurry pump is influenced, and the service life of the slurry pump is easily shortened. Furthermore, the cooling water cannot be collected, which seriously results in the waste of the cooling water.

Therefore, the slurry pump in the prior art has unreasonable design on a plunger cooling structure, cooling water is easily wasted, the cooling water causes serious pollution to the use environment of the slurry pump, the work environment of workers is influenced, and the environmental protection performance of the slurry pump is reduced.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model has the main object of providing a structural design is reasonable, and the additional cost is low, guarantees cooling water circulative cooling and lubrication action, can concentrate moreover and collect the discharge, has avoided the pollution to slush pump service environment, can realize the recycling of cooling water moreover, further reaches the slush pump of environmental protection requirement.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a slurry pump comprising: hydraulic drive device, the pump body and ceramic plunger device, hydraulic drive device's drive end with the ceramic plunger device is connected, ceramic plunger device sliding connection is in inside the pump body, makes hydraulic drive device's drive end promotes the flexible slip of ceramic plunger device along pump body inner chamber the upper end of the pump body is equipped with ceramic plunger cooling and lubricating device, ceramic plunger cooling and lubricating device cover is established the ceramic plunger outer wall of ceramic plunger device.

In a preferred embodiment, the ceramic plunger cooling and lubricating device comprises: a sealing ring and a water inlet ring; the sealing ring is fixedly connected to the upper end portion of the pump body, a water sealing rubber ring is arranged inside the sealing ring and between the ceramic plungers in a sealing mode, and the inner cavity of the pump body is isolated in a sealing mode through the water sealing rubber ring.

In a preferred embodiment, the upper side of the sealing ring is detachably connected with the water inlet ring, one side of the water inlet ring, which is close to the ceramic plunger, is provided with a cooling ring cavity and a sealing ring cavity, a water inlet and a water outlet are formed between the cooling ring cavity penetrating through the water inlet ring and the outside, and a water sealing ring is arranged in the sealing ring cavity.

In a preferred embodiment, the sealing ring inner cavity is a stepped ring cavity structure, and includes: a water sealing ring cavity and a plunger cavity; the size of the water sealing ring cavity is larger than that of the plunger cavity, and the water sealing rubber ring is arranged inside the water sealing ring cavity.

In a preferred embodiment, the size of the lower end part of the water inlet ring is adapted to the size of the cavity of the water sealing ring, and the lower end part of the water inlet ring is inserted into the upper end part of the water sealing rubber ring, so that the water inlet ring presses the water sealing rubber ring for sealing.

In a preferred embodiment, the upper end of the sealing ring is provided with a lower connecting hole to adapt to the position of the lower connecting hole, the edge of the water inlet ring is provided with a connecting lug, the connecting lug is provided with an upper connecting hole in a penetrating way, and a tightening bolt is arranged through the upper connecting hole and the lower connecting hole.

In a preferred embodiment, a tightening gap is left between an upper end surface of the lower connecting hole and a lower end surface of the upper connecting hole.

In a preferred embodiment, the lower connecting hole is a through hole, and the lower end of the tightening bolt extends out of the lower connecting hole to be adaptively connected with a threaded hole formed in the upper end of the pump body, so that the water inlet ring and the sealing ring are tightly connected to the upper end of the pump body through the tightening bolt.

In a preferred embodiment, a fixing hole is formed through the sealing ring, a connecting bolt is arranged in the fixing hole, and the lower end of the connecting bolt is adapted to be connected with a threaded hole formed in the upper end of the pump body, so that the sealing ring is fixedly connected to the upper end of the pump body.

In a preferred embodiment, the inner wall of the lower connecting hole is provided with an internal thread which is adaptively connected with the tightening bolt; and the water inlet ring is tightly connected to the upper end of the sealing ring in a pressing way.

In a preferred embodiment, the water inlet and the water outlet are symmetrically arranged.

In a preferred embodiment, a clamping step is arranged at the upper end of the cavity of the pump body, a clamping convex ring is arranged at the lower end of the inner cavity of the sealing ring, and the clamping convex ring is clamped in the clamping step; and a pump body sealing ring is arranged between the clamping convex ring and the clamping step.

In a preferred embodiment, the thickness of the clamping step is adapted to the thickness of the annular wall of the clamping collar.

The utility model discloses a slush pump has following beneficial effect:

the utility model provides a mud pump, hydraulic drive device's drive end with ceramic plunger device connects, and ceramic plunger device sliding connection is inside the pump body, makes hydraulic drive device's drive end promote ceramic plunger device along the flexible slip of pump body inner chamber, is equipped with ceramic plunger cooling and lubrication device at the upper end of the pump body, and ceramic plunger cooling and lubrication device cover establishes the ceramic plunger outer wall of ceramic plunger device. The sealing ring is fixedly connected to the upper end part of the pump body, and a water sealing rubber ring is arranged between the inside of the sealing ring and the ceramic plunger in a sealing manner, so that the inner cavity of the pump body is sealed and isolated by the water sealing rubber ring; the sealing ring upside can be dismantled and be connected with into water ring, and cooling ring chamber and sealed ring chamber have been seted up to one side that the ring that intakes is close to ceramic plunger, run through and set up water inlet and delivery port between cooling ring chamber and the outside of intaking ring, be equipped with the water seal sealing washer at sealed ring intracavity portion. The problem of among the prior art, the slush pump in the use, in order to cool off and the lubricated effect to the ceramic plunger, need supply the water of cooling and the lubricated effect at ceramic plunger upper end, because structural design is unreasonable, a large amount of cooling water spills over, leaves along slush pump outer wall, seriously influences slush pump's service environment. Furthermore, water after cooling and lubrication is left along the outer wall of the mud pump, which easily causes the mud pump to adsorb a large amount of dirt for a long time, and influences the service life of the mud pump. The mud pump has reasonable structural design and low additional cost; through to ceramic plunger cooling and lubrication device structural design, guarantee cooling water circulative cooling and lubrication action, can concentrate moreover and collect the discharge, avoid the pollution to slush pump service environment, can realize the recycling of cooling water moreover, further reach the requirement of environmental protection.

Drawings

FIG. 1 is a schematic diagram of an overall configuration of a mud pump according to one embodiment of the present disclosure;

FIG. 2 is a schematic view of a structure of a ceramic plunger cooling and lubricating device and a pump body of a mud pump according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural view of a ceramic plunger cooling and lubricating device of a mud pump according to one embodiment of the present disclosure;

FIG. 4 is a schematic view of a seal ring and water inlet ring connection for a mud pump according to one embodiment of the present disclosure;

FIG. 5 is a schematic view of a water intake ring structure for a mud pump according to one embodiment of the present disclosure;

FIG. 6 is a cross-sectional view taken along line A-A of the water intake ring of the mud pump of FIG. 5 according to one embodiment of the present disclosure;

FIG. 7 is a view, in the direction B, of the water inlet ring of the mud pump of FIG. 5 according to one embodiment of the present disclosure;

FIG. 8 is a schematic structural view of a seal ring of a mud pump according to one embodiment of the present disclosure;

FIG. 9 is a cross-sectional view taken along line C-C of the seal ring of the mud pump of FIG. 8 according to one embodiment of the present disclosure.

[ description of main reference symbols ]

1. A hydraulic drive device;

2. the pump body 21, a clamping step 22 and a threaded hole;

3. a ceramic plunger device, 31, a ceramic plunger;

4. a ceramic plunger cooling and lubricating device;

41. the sealing ring, 412, the clamping table ring, 413, the lower connecting hole, 414, the water sealing ring cavity, 415, the plunger cavity, 416 and the fixing hole;

42. tightening the gap;

43. the water inlet ring 431, the upper connecting hole 432, the water inlet 433, the water outlet 434, the cooling ring cavity 435, the sealing ring cavity 436, the water sealing ring 437 and the connecting lug;

45. and (5) sealing the water rubber ring.

Detailed Description

The mud pump of the present invention will be described in further detail with reference to the accompanying drawings and embodiments of the present invention.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

For ease of description, spatially relative terms such as "above … …"),

"above … …", "on … …", "above", and the like, are used to describe one device or feature as it appears in the figures in relation to another device or feature in spatial position. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1 to 9, the mud pump includes: the hydraulic drive device mainly provides a power source for the whole plunger pump, and comprises a hydraulic drive device 1, a pump body 2 and a ceramic plunger device 3, wherein the drive end of the hydraulic drive device 1 is connected with the ceramic plunger device 3, and the ceramic plunger device 3 is slidably connected inside the pump body 2, so that the drive end of the hydraulic drive device 1 pushes the ceramic plunger device 3 to slide along the inner cavity of the pump body 2 in a telescopic manner.

In order to cool and lubricate the ceramic plunger 31 of the ceramic plunger device 3, a ceramic plunger cooling and lubricating device 4 is arranged at the upper end part of the pump body 2, and the ceramic plunger cooling and lubricating device 4 is sleeved on the outer wall of the ceramic plunger 31 of the ceramic plunger device 3. The ceramic plunger 31 is continuously supplied with cooling water through the ceramic plunger cooling and lubricating device 4, and the ceramic plunger 31 is cooled and lubricated by the cooling water, so that the temperature of the ceramic plunger 31 meets the working requirement, and the service life of the ceramic plunger 31 is prolonged.

Furthermore, in order to solve the problem that the cooling water is not collected and treated in a centralized manner in the process of supplying the cooling water to the ceramic plunger device 4 under a large pressure and overflows along the outer side of the upper wall of the ceramic plunger 31, the working environment of the slurry pump is polluted; especially, the mud pump is mostly used in the environmental protection department, and the use effect is seriously influenced. For this purpose, the ceramic plunger cooling and lubricating device 4 of the slurry pump comprises: a sealing ring 41 which mainly seals and isolates the upper end part of the inner cavity of the pump body 2; and a water inlet ring 43 for supplying cooling water to the ceramic plunger 31, and for sealing the pressing seal ring 41 and supplying cooling water. The sealing ring 41 is fixedly connected (a sealing structure is arranged between the sealing ring 41 and the pump body 2, and no relative movement exists between the sealing ring 41 and the pump body, so that the sealing requirement is not high, and the sealing effect can be realized by the traditional sealing structure) at the upper end part of the pump body 2, a water sealing rubber ring 45 is arranged between the inside of the sealing ring 41 and the ceramic plunger 31 in a sealing manner, so that the inner cavity of the pump body 2 is isolated in a sealing manner by the water sealing rubber ring 45. The sealing ring 41 is fixedly connected to the upper end part of the pump body 2, and a water sealing rubber ring 45 is arranged between the sealing ring 41 and the ceramic plunger 31 in a sealing manner, so that the upper side and the lower side of the pump body 2 are isolated in a sealing manner.

In order to realize the supply of cooling water, guarantee the cooling effect and the lubrication action of cooling water, avoid the cooling water to supply not enough, lead to the defect that cooling effect and lubrication effect reduce. The upper side of the sealing ring 41 is detachably connected with a water inlet ring 43, one side of the water inlet ring 43, which is close to the ceramic plunger 31, is provided with a cooling ring cavity 434 and a sealing ring cavity 435, a water inlet 432 and a water outlet 433 are arranged between the cooling ring cavity 434 penetrating through the water inlet ring 43 and the outside, and a water sealing ring 436 is arranged inside the sealing ring cavity 435. The cooling ring cavity 434 is filled with cooling water, and the cooling water circularly flows, so that the cooling effect is ensured, the lubricating effect is achieved, and further, dirt generated by abrasion can be taken out. The upper side of the cooling ring cavity 434 can be sealed through the sealing ring cavity 435 (namely, a sealing structure is arranged in the sealing ring cavity 435 to seal the space between the water inlet ring 43 and the ceramic plunger 31, so that the cooling water in the cooling ring cavity 434 cannot overflow from the upper end of the water inlet ring 43, and the use effect is ensured).

Further, preferably, the pipelines connected with the water inlet 432 and the water outlet 433 are respectively provided with a one-way valve, so that cooling water is prevented from flowing back, and the cooling and lubricating effects are reduced.

Preferably, the water seal 436 is a polyurethane seal.

In order to ensure the more convenient installation of the water sealing rubber ring 45, and the limiting function of the water sealing rubber ring 45 can be conveniently realized. This 41 inner chambers of sealing ring are step ring cavity structure, include: a water sealing ring cavity 414 for installing the water sealing rubber ring 45 and a plunger cavity 415 for passing through the ceramic plunger. Of course, in order to satisfy the installation function of the water seal rubber ring 45, the size of the water seal ring cavity 414 is larger than that of the plunger cavity 415, and the water seal rubber ring 45 is arranged inside the water seal ring cavity 414.

In order to further guarantee the sealing effect of the water sealing rubber ring 45, particularly, in the long-term use process, the water sealing rubber ring 45 is abraded, the sealing effect is reduced, and the mud pump can guarantee the sealing effect of the water sealing rubber ring 45 in a longer service life by adjusting the compression degree of the water inlet ring 43. The size of the lower end part of the water inlet ring 43 is matched with the size of the water sealing ring cavity 414, and the lower end part of the water inlet ring 43 is inserted into the upper end part of the water sealing rubber ring 45, so that the water inlet ring 43 tightly presses the water sealing rubber ring 45 for sealing. Not only in the use process, but also the sealing effect of the water sealing rubber ring 45 can be ensured through the pressing effect of the water inlet ring 43; and in the long-term use, because frictional wear between water seal rubber ring 45 inner wall and the ceramic plunger 31, can further adjust the degree that compresses tightly of water ring 43, and then guarantee water seal rubber ring 45's sealed effect, the life of extension water seal rubber ring 45 also reduces the repair time of slush pump.

The water inlet ring 43 can adjust the pressing and sealing of the water sealing rubber ring 45 conveniently, and the connection effect between the water inlet ring 43 and the sealing ring 41 is satisfied. The upper end of the sealing ring 41 is provided with a lower connecting hole 413 which is adapted to the position of the lower connecting hole 413, the edge of the water inlet ring 43 is provided with a connecting lug 437, an upper connecting hole 431 penetrates through the connecting lug 437, and a tightening bolt penetrates through the upper connecting hole 431 and the lower connecting hole 413. Through adjusting bolt, not only realized the connection effect, also can be convenient satisfy in the later stage use, through the regulatory action of tightening bolt, satisfy the sealed effect that compresses tightly to sealing rubber ring 45.

Of course, in order to satisfy the tightening effect of the tightening bolt on the water inlet ring 43 and the sealing ring 41, especially the requirement of ensuring a certain service life of the water sealing rubber ring 45 is met. A tightening gap 42 is provided between the upper end surface of the lower connection hole 413 and the lower end surface of the upper connection hole 431. In the use, compress tightly into water ring 43 through adjusting the agent bolt, and then reduce the size of tightening clearance 42, satisfy the pressure tight seal to sealing water rubber ring 45, guarantee to seal water rubber ring 45's sealed effect.

In a preferred embodiment, for convenience of connection, the lower connection hole 413 is a through hole, and the lower end of the tightening bolt extends out of the lower connection hole 413 to be directly adapted and connected with the threaded hole 22 formed at the upper end of the pump body 2, so that the water inlet ring 43 and the sealing ring 41 are tightly connected to the upper end of the pump body 2 through the tightening bolt.

In another embodiment, a fixing hole 416 is formed through the sealing ring 41 (the upper end portion is preferably a counter bore to reduce the possibility of interference with the water inlet ring 43), a connecting bolt is arranged inside the fixing hole 416, and the lower end portion of the connecting bolt is adapted to be connected with the threaded hole 22 formed in the upper end portion of the pump body 2, so that the sealing ring 41 is fixedly connected to the upper end of the pump body 2; the connection between the connecting bolt pair seal ring 41 and the pump body 2 is ensured.

Of course, in order to secure the coupling function between the lower coupling hole 413 and the tightening bolt. The inner wall of the lower connecting hole 413 is provided with internal threads which are adaptively connected with the tightening bolt; the water inlet ring 43 is press-connected to the upper end of the sealing ring 41.

Of course, in order to realize the recycling of the cooling water, the cooling and lubricating effects are ensured. The water inlet 432 and the water outlet 433 are symmetrically arranged and are arranged on two sides of the water inlet ring 43, so that the uniformity of circular flow is ensured, and the defect of unbalanced cooling and lubrication is avoided.

In order to improve the coupling effect between the pump body 2 and the sealing ring 41, in particular to facilitate the positioning connection. The upper end of the cavity of the pump body 2 is provided with a clamping step 21, the lower end of the cavity of the adaptive sealing ring 41 is provided with a clamping convex ring 412, and the clamping convex ring 412 is clamped in the clamping step 21. The bent structure of the clamping convex ring 412 and the clamping step 21 further ensures the sealing effect at the mutual connection position.

Of course, in order to ensure the sealing effect, a pump body sealing ring is arranged between the clamping convex ring 412 and the clamping step 21.

Preferably, the pump body sealing ring is a polyurethane sealing ring; the pump body sealing ring is a Y-shaped sealing ring.

Naturally, in order to ensure the tightness of the connection between the sealing ring 41 and the pump body 2, the thickness of the snap-in step 21 is adapted to the thickness of the wall of the snap-in collar 412.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. A slurry pump comprising: the device comprises a hydraulic driving device (1), a pump body (2) and a ceramic plunger device (3), wherein the driving end of the hydraulic driving device (1) is connected with the ceramic plunger device (3), the ceramic plunger device (3) is connected in the pump body (2) in a sliding manner, so that the driving end of the hydraulic driving device (1) pushes the ceramic plunger device (3) to slide along the inner cavity of the pump body (2) in a telescopic manner, and the device is characterized in that a ceramic plunger cooling and lubricating device (4) is arranged at the upper end part of the pump body (2), and the ceramic plunger cooling and lubricating device (4) is sleeved on the outer wall of a ceramic plunger (31) of the ceramic plunger device (3);

the ceramic plunger cooling and lubricating device (4) comprises: a sealing ring (41) and a water inlet ring (43); the sealing ring (41) is fixedly connected to the upper end part of the pump body (2), and a water sealing rubber ring (45) is hermetically arranged between the inside of the sealing ring (41) and the ceramic plunger (31), so that the inner cavity of the pump body (2) is hermetically isolated by the water sealing rubber ring (45);

the upper side of the sealing ring (41) is detachably connected with the water inlet ring (43), one side, close to the ceramic plunger (31), of the water inlet ring (43) is provided with a cooling ring cavity (434) and a sealing ring cavity (435), a water inlet (432) and a water outlet (433) are formed between the cooling ring cavity (434) penetrating through the water inlet ring (43) and the outside, and a water sealing ring (436) is arranged inside the sealing ring cavity (435).

2. The mud pump as set forth in claim 1, wherein the sealing ring (41) inner cavity is a stepped ring cavity structure comprising: a water sealing ring cavity (414) and a plunger cavity (415); the size of the water sealing ring cavity (414) is larger than that of the plunger cavity (415), and the water sealing rubber ring (45) is arranged inside the water sealing ring cavity (414).

3. The mud pump as set forth in claim 2, wherein the lower end of the water inlet ring (43) is sized to fit into the water seal ring cavity (414), and the lower end of the water inlet ring (43) is inserted into the upper end of the water seal rubber ring (45) such that the water inlet ring (43) presses the water seal rubber ring (45) to seal.

4. The mud pump as claimed in claim 3, wherein the sealing ring (41) has a lower connection hole (413) formed at an upper end thereof to correspond to the position of the lower connection hole (413), a connection lug (437) is formed at an edge of the water inlet ring (43), an upper connection hole (431) is formed through the connection lug (437), and a tightening bolt is formed through the upper connection hole (431) and the lower connection hole (413).

5. The mud pump as set forth in claim 4, wherein a tightening gap (42) is provided between an upper end surface of the lower connection hole (413) and a lower end surface of the upper connection hole (431).

6. The mud pump as claimed in claim 5, wherein the lower connecting hole (413) is a through hole, and the lower end of the tightening bolt extends out of the lower connecting hole (413) and is adapted to be connected with a threaded hole (22) formed in the upper end of the pump body (2), so that the water inlet ring (43) and the sealing ring (41) are tightly connected to the upper end of the pump body (2) through the tightening bolt.

7. The mud pump as claimed in claim 5, wherein a fixing hole (416) is formed through the sealing ring (41), and a connecting bolt is arranged in the fixing hole (416), and the lower end of the connecting bolt is adapted to be connected with a threaded hole (22) formed in the upper end of the pump body (2) so that the sealing ring (41) is fixedly connected to the upper end of the pump body (2);

the inner wall of the lower connecting hole (413) is provided with an internal thread which is adaptively connected with the tightening bolt; the water inlet ring (43) is tightly pressed and connected to the upper end of the sealing ring (41).

8. A mud pump according to any of claims 1 to 7, characterised in that the water inlet (432) and outlet (433) are symmetrically arranged.

9. The mud pump as claimed in any one of claims 1 to 7, wherein a clamping step (21) is provided at the upper end of the cavity of the pump body (2), a clamping convex ring (412) is provided at the lower end of the cavity of the sealing ring (41), and the clamping convex ring (412) is clamped in the clamping step (21); and a pump body sealing ring is arranged between the clamping convex ring (412) and the clamping step (21).

10. The mud pump as set forth in claim 9, wherein the thickness of the clamping step (21) corresponds to the thickness of the wall of the clamping collar (412).