CN216975213U - Flow distribution valve group for reciprocating pump and reciprocating pump - Google Patents
Flow distribution valve group for reciprocating pump and reciprocating pump Download PDFInfo
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- CN216975213U CN216975213U CN202220214373.9U CN202220214373U CN216975213U CN 216975213 U CN216975213 U CN 216975213U CN 202220214373 U CN202220214373 U CN 202220214373U CN 216975213 U CN216975213 U CN 216975213U
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Abstract
The utility model discloses a flow distribution valve group for a reciprocating pump and the reciprocating pump. At least two distributing channels are arranged in a valve body of the distributing valve group, each distributing channel shares a slurry main inlet and a slurry main outlet, each distributing channel is respectively provided with a suction valve, a discharge valve and a distributing port, and the suction valve and the discharge valve in the same distributing channel are connected with a working cavity of a reciprocating pump conveying cylinder through the same distributing port; the suction valve and the discharge valve are all one-way valves, each one-way valve comprises a valve core and a valve seat, a slurry channel is arranged on each valve seat, each valve core is installed in each slurry channel, and a sealing structure is arranged between each valve core and each slurry channel. The utility model simplifies and integrates the external pipelines of the flow distribution valve group, greatly reduces the quantity of pipelines and pipe fittings, and is convenient for maintaining and replacing the seal of the working cavity of the conveying cylinder; meanwhile, a soft-hard composite sealing structure is preferably adopted, so that the sealing performance and reliability of the valve are greatly improved, and zero leakage and long service life of the distribution valve are ensured.
Description
Technical Field
The utility model relates to a reciprocating pump, in particular to a flow distribution valve set for the reciprocating pump and the reciprocating pump.
Background
At present, the conveying of solid-liquid mixed media such as slurry, ore pulp and the like is often realized by adopting a reciprocating pump. The reciprocating pump drives a piston in the conveying cylinder to do reciprocating linear motion through hydraulic pressure, so that the pressure intensity or the volume in the conveying cylinder is changed, and automatic slurry suction and slurry discharge of the conveying cylinder are realized. The conveying cylinder controls the suction and discharge of slurry through the flow distribution valve group, namely when the conveying cylinder sucks slurry, a suction valve in the flow distribution valve group is opened, a discharge valve is closed to provide a slurry suction channel, when the slurry is discharged, the suction valve of the flow distribution valve group is closed, and the discharge valve is opened to provide a slurry discharge channel.
Each working cavity of a conveying cylinder of the reciprocating pump needs to be provided with a group of suction valves and discharge valves for flow distribution, and meanwhile, each suction valve and each discharge valve need to be connected in a corresponding outer pipeline in a matching way, so that the structure of the external pipeline of the reciprocating pump is complex, and the prior installation and later maintenance are inconvenient; when the pipeline connecting device is used on site by a user, the pipeline connection is complex, and the internal stress of the pipeline installation causes the non-concentricity between the conveying cylinder and the piston, so that the abrasion of the piston sealing element in the conveying cylinder is accelerated, the operating fault point is increased, and the operation maintenance difficulty and the maintenance cost are increased. In addition, the sealing parts of the suction valve and the discharge valve have short sealing life under the impact collision of the valve core in the processes of flushing and opening and closing solid particles of slurry, so that the consumption of maintenance consumables is high; failure of the valve seal can also result in a dramatic decrease in the efficiency of the entire reciprocating pump.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problems that the conventional reciprocating pump is complex in external pipeline connection, large in total number of valves and short in service life of valve seal, and provides a flow distribution valve group for the reciprocating pump and a reciprocating pump, which are simple in pipeline between a conveying cylinder and the flow distribution valve group, easy to install and maintain, reliable in valve action and good in seal.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model provides a reciprocating pump is with joining in marriage a class valves, includes the valve body, set up two at least passageways that join in marriage in the valve body, its structural feature lies in:
each distribution channel shares a slurry total inlet and a slurry total outlet, each distribution channel is respectively provided with a suction valve, a discharge valve and a distribution port, and the suction valve and the discharge valve in the same distribution channel are connected with a working cavity of a reciprocating pump conveying cylinder through the same distribution port;
the suction valve and the discharge valve are all one-way valves, each one-way valve comprises a valve core and a valve seat, a slurry channel is arranged on each valve seat, each valve core is installed in each slurry channel, and a sealing structure is arranged between each valve core and each slurry channel.
The utility model connects the suction valve and the discharge valve in the same flow distribution channel with the working cavity of the delivery cylinder of the reciprocating pump through the same flow distribution port, has simple integral structure, ensures that one working cavity of the delivery cylinder can be connected with one flow distribution port of one flow distribution channel of the flow distribution valve group only by one pipeline, thereby simplifying the external pipeline of the flow distribution valve group, ensuring the reliable working performance of the flow distribution valve group, improving the integral working efficiency of the reciprocating pump, having long service life and simple and convenient field maintenance.
Preferably, the sealing structure preferably adopts a soft-hard composite seal formed by combining a hard sealing pair and a soft sealing pair, the hard sealing pair comprises a metal joint surface arranged between a slurry channel of the valve seat and the valve core, the metal joint surface comprises a metal seat arranged at the outlet end of the slurry channel of the valve seat, and a first conical surface or spherical surface seal is formed between the metal seat and the valve core; the soft sealing pair comprises an elastic seat arranged on the metal seat, and a second conical surface or spherical surface seal is formed between the elastic seat and the valve core.
Preferably, the elastic seat is made of a high polymer elastic material.
Preferably, the elastic seat is detachably fixed on the metal seat through a pressing plate.
Preferably, the outer circular surface of the metal seat is detachably connected with the valve body.
Preferably, the central positioning sleeve is internally provided with a bushing which is in clearance fit with the shaft-shaped body, so that the central positioning sleeve of the valve seat is prevented from being directly worn, the maintainability of the whole equipment is improved, and the use cost of the equipment is reduced.
Preferably, two flow distribution channels are arranged in the valve body, and each flow distribution channel is provided with one flow distribution port, so that the valve body can be conveniently connected with a double-delivery-cylinder single-action reciprocating pump (such as a hydraulic piston type slurry pump) for use.
Preferably, two flow distribution channels are arranged in the valve body, and each flow distribution channel is provided with two flow distribution ports respectively, so that the valve body can be conveniently connected with a double-delivery-cylinder double-acting reciprocating pump (such as a hydraulic piston type slurry pump) for use.
Preferably, the valve body is a two-section structure formed by detachably connecting an upper section and a lower section, the upper section is only provided with the slurry main outlet, the lower section is provided with the flow distribution channel and the slurry main inlet, and a joint surface of the upper section and the lower section is provided with a sealing ring.
Or the valve body is of a three-section structure formed by sequentially and detachably connecting an upper section, a middle section and a lower section, the upper section is only provided with the slurry main outlet, the middle section is provided with the flow distribution port and the flow distribution channel, the lower section is only provided with the slurry main inlet, and the joint surfaces of the upper section and the middle section and the joint surfaces of the middle section and the lower section are respectively provided with a sealing ring.
Based on the same inventive concept, the utility model also provides a reciprocating pump which comprises two conveying cylinders and a flow distribution valve group, wherein each conveying cylinder is provided with at least one working cavity, and one working cavity of each conveying cylinder is connected with a flow distribution port of a flow distribution channel of the flow distribution valve group through only one pipeline.
Based on the same inventive concept, the utility model further provides a reciprocating pump, which comprises a conveying cylinder and a flow distribution valve group, wherein the conveying cylinder is provided with two working cavities, and one working cavity of the conveying cylinder is connected with a flow distribution port of a flow distribution channel of the flow distribution valve group through only one pipeline.
In summary, the valve body of the flow distribution valve group for the reciprocating pump is formed by splicing 3 sections or 2 sections, and a closed cavity is formed by combining bolts and sealing rings between the sections to bear internal and external pressure; 4 check valves for controlling the one-way flow of slurry are arranged in a closed cavity formed by the valve body, and a soft-hard composite sealing structure is adopted between a valve seat and a valve core of each check valve: each valve core which moves linearly adopts a T-shaped structure, the peripheral surface of the head part of each T-shaped valve core is provided with a conical surface or/and a spherical surface sealing structure, an elastic seat matched with the valve core is made of a high polymer elastic material and is fixed on a metal seat through a pressing plate, the matching surface of the elastic seat is provided with the conical surface or/and the spherical surface sealing structure, the T-shaped valve core and the elastic seat made of the high polymer elastic material form a soft sealing pair, the elastic seat absorbs and buffers the impact when the T-shaped valve core is closed and simultaneously achieves zero leakage, the T-shaped valve core and the metal seat form a conical surface or spherical surface sealing pair to form a metal hard sealing pair, and the soft and hard sealing pairs realize the complementation of the service life and the performance and ensure the zero leakage and the long service life; the metal seat is connected to the central positioning sleeve through a bracket, the central positioning sleeve is in clearance fit with the shaft-shaped body of the valve core, and a bush made of wear-resistant materials can be arranged at the matching part;
the distributing valve of the utility model has 4 or 6 main channels connected with the outside, wherein one is a slurry main inlet, one is a slurry main outlet, and the other 2 or 4 channels are distributing ports and are used for being connected to a working cavity of a reciprocating pump through an external pipeline. The distributing valve of the utility model with 4 main channels can be correspondingly connected to 2 working chambers of a double-conveying-cylinder single-action reciprocating pump or 2 working chambers of a single-conveying-cylinder double-action reciprocating pump; the distributing valve of the utility model with 6 main channels can be connected to 4 working chambers of a double-acting reciprocating pump with double delivery cylinders.
Compared with the prior art, the utility model has the beneficial effects that:
the distributing valve has simple integral structure and reliable working performance, improves the integral working efficiency of the reciprocating pump, has long service life and is simple and convenient for maintaining the valve on site.
The utility model can replace the common structural form of 4 or 8 control valves in the market through one distributing valve, simplifies and integrates the external pipelines, and greatly reduces the number of the pipelines and vulnerable parts; the control method is simple and reliable, greatly simplifies the system structure, reduces the manufacturing cost and reduces the fault sources.
Compared with the existing plunger pump, the distributing valve greatly simplifies the structural layout of the outer pipeline of the reciprocating pump, the internal installation stress of the outer pipeline is small, the concentricity of the seal between the conveying cylinder and the piston cannot be influenced, the reliability of equipment is effectively improved, the field operation and maintenance difficulty is reduced, spare and accessory parts required by maintenance are reduced, and the maintenance cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a top view structural diagram of a first embodiment of the utility model.
Fig. 2 is a sectional view a-a of fig. 1.
Fig. 3 is a side view structural diagram of the first embodiment of the utility model.
Fig. 4 is a sectional structural view (closed state) of the check valve using the conical surface seal.
Fig. 5 is a sectional structural view (open state) of the check valve using the conical surface seal.
Fig. 6 is a sectional structural view (closed state) of the check valve employing the spherical seal.
Fig. 7 is a sectional structural view (opened state) of the check valve using the spherical seal.
Fig. 8 is a piping connection diagram for a dual feed cylinder single acting hydraulic piston slurry pump in accordance with a first embodiment of the present invention.
Fig. 9 is a top view structural diagram of a second embodiment of the present invention.
Fig. 10 is a sectional view a-a of fig. 9.
Fig. 11 is a side view structural diagram of the second embodiment of the utility model.
Fig. 12 is a piping connection diagram for a double-acting hydraulic piston slurry pump of a double delivery cylinder according to a second embodiment of the present invention.
Fig. 13 is a piping connection diagram for a single delivery cylinder double acting hydraulic piston slurry pump in a third embodiment of the present invention.
Detailed Description
The utility model is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the utility model.
For convenience of description, the relative positional relationship of the components, such as: the descriptions of up, down, left, right, etc. are made with reference to the layout directions of the drawings in the specification, and do not limit the structure of the patent.
As shown in fig. 1-3, an embodiment of a distribution valve set for a reciprocating pump according to the present invention includes a valve body 1, and a distribution channel a and a distribution channel B are disposed in the valve body 1. The distribution channel A, B shares the slurry inlet 3 and the slurry outlet 4. The distribution channel A, B is respectively provided with a suction valve 5, a discharge valve 6 and a distribution port 7, the suction valve 5 and the discharge valve 6 in the same distribution channel 2 are respectively connected with one end of the distribution port 7, and the other end of the distribution port 7 is connected with the working chamber of the delivery cylinder of the reciprocating pump.
For convenient equipment, reduce the leak point, valve body 1 is two segmentation structures, and the upper segment is structural only to be set up the ground paste total exit 4, and the lower segment is structural to be set up the flow distribution passageway A, B and the ground paste total entry 3, forms through bolt and sealing washer connection between two segments of structures.
As shown in fig. 4 to 7, both the suction valve 5 and the discharge valve 6 are check valves. The one-way valve comprises a valve core 8 and a valve seat 9. The valve core 8 is of a T-shaped structure and includes a head portion 81 and a shaft-shaped body 82 perpendicular to the head portion 81. The valve seat 9 comprises a metal seat (formed by metal or a hard alloy layer formed by overlaying welding and the like) 91 and a central positioning sleeve 92, wherein the metal seat 91 is connected with the central positioning sleeve 92 through a rib plate or a connecting rod 93, and the central positioning sleeve 92 and the metal seat 91 are coaxially arranged. A slurry channel is arranged between the metal base 91 and the rib plates or the connecting rods 93, the outlet end of the slurry channel is arranged on the metal base 91, and the inlet end of the slurry channel is arranged between the rib plates or the connecting rods 93. A sealing structure is arranged between the head 81 of the valve core 8 and the outlet end of the slurry channel. A bushing 94 made of an abrasion-resistant material is arranged in the center positioning sleeve 92, and the shaft-shaped body 82 of the valve core 8 is slidably arranged in the bushing 94, i.e., the bushing 94 is in clearance fit with the shaft-shaped body 82. The spring 10 and the positioning member 11 for positioning the spring 10 are sequentially fitted over the end of the shaft 82.
The sealing structure preferably adopts soft-hard composite sealing formed by combining a hard sealing pair and a soft sealing pair. The hard sealing pair comprises a metal joint surface arranged between the slurry channel of the valve seat 9 and the valve core 8, the metal joint surface comprises a metal seat 91 arranged at the outlet end of the slurry channel of the valve seat 9, and a first conical surface or spherical surface seal 12 is formed between the metal seat 91 and the head 81 of the valve core 8. The soft sealing pair comprises an elastic seat 13 mounted on the metal seat 91, and a second conical surface or spherical surface seal 14 is formed between the elastic seat 13 and the head 81 of the valve core 8.
The elastic seat 13 is made of a polymer elastic material. The elastic seat 13 is installed on the metal seat 91 through the detachable pressing plate 2, the elastic seat 13 and the metal seat 91 are coaxially connected into a whole through bolts, and the elastic seat 13 and the metal seat 91 are respectively in clearance fit with the head 81 of the valve core 8 in a conical surface or a spherical surface.
As shown in fig. 8, when the embodiment of the flow distribution valve set for the reciprocating pump of the utility model is used, the flow distribution port 7 of the flow distribution channel a can be connected with the left working chamber Wa of the left delivery cylinder of the double-delivery-cylinder single-acting reciprocating pump (such as a hydraulic piston type slurry pump) through only one pipeline, and the flow distribution port 7 of the flow distribution channel B is connected with the right working chamber Wb of the right delivery cylinder of the double-delivery-cylinder single-acting reciprocating pump through only one pipeline. When the piston of the reciprocating pump moves to the right, slurry enters the flow distribution valve from the slurry main inlet 3 and flows into the left working chamber Wa through the suction valve 5 and the flow distribution port 7 of the flow distribution channel A, and simultaneously slurry in the right working chamber Wb is sent to a load connected with the slurry main outlet 4 through the flow distribution port 7, the discharge valve 6 and the slurry main outlet 4 of the flow distribution channel B; when the piston of the reciprocating pump moves to the left, slurry enters the flow distribution valve from the slurry main inlet 3, flows through the suction valve 5 and the flow distribution port 7 of the flow distribution channel B and enters the right working chamber Wb, and simultaneously, the slurry in the left working chamber Wa is sent to a load connected with the slurry main outlet 4 through the flow distribution port 7, the discharge valve 6 and the slurry main outlet 4 of the flow distribution channel A.
As shown in fig. 9 to 11, a second embodiment of the flow distribution valve set for a reciprocating pump according to the present invention has a structure substantially the same as that of the first embodiment, except that two flow distribution ports 7 are respectively disposed in a flow distribution channel A, B, the valve body 1 has a three-stage structure, the upper stage structure is only provided with the slurry main outlet 4, the middle stage structure is provided with a flow distribution channel A, B, the lower stage structure is only provided with the slurry main inlet 3, and the three stages are sequentially connected by bolts and sealing rings.
As shown in fig. 12, the structure of the second embodiment of the flow distribution valve set for the reciprocating pump of the present invention can be communicated with four working chambers of a double-delivery-cylinder double-acting reciprocating pump (such as a hydraulic piston type slurry pump), wherein two flow distribution ports 7 of a flow distribution channel a are respectively connected with a left working chamber Wa of a left delivery cylinder and a left working chamber Wb2 of a right delivery cylinder through only one pipeline, and two flow distribution ports 7 of a flow distribution channel B are respectively connected with a right working chamber Wa2 of the left delivery cylinder and a right working chamber Wb of the right delivery cylinder through only one pipeline. When the piston of the reciprocating pump moves to the right, slurry enters the distributing valve from the slurry main inlet 3 and flows through the suction valve 5 and the distributing port 7 of the distributing channel A to enter the left working cavity Wa of the left conveying cylinder and the left working cavity Wb2 of the right conveying cylinder, and simultaneously, the slurry in the right working cavity Wa2 of the left conveying cylinder and the slurry in the right working cavity Wb of the right conveying cylinder are sent to a load connected with the slurry main outlet 4 through the distributing port 7, the discharge valve 6 and the slurry main outlet 4 of the distributing channel B; when the piston of the reciprocating pump moves to the left, slurry enters the distributing valve from the slurry main inlet 3 and flows through the suction valve 5 and the distributing port 7 of the distributing channel B to enter the right working chamber Wa2 of the left conveying cylinder and the right working chamber Wb of the right conveying cylinder, and simultaneously, the slurry in the left working chamber Wa of the left conveying cylinder and the slurry in the left working chamber Wb2 of the right conveying cylinder are sent to a load connected with the slurry main outlet 4 through the distributing port 7, the discharge valve 6 and the slurry main outlet 4 of the distributing channel A.
As shown in fig. 13, the flow distribution valve set for the reciprocating pump of the present invention can also be used in cooperation with a single delivery cylinder double-acting reciprocating pump, and the specific connection is as follows: the flow distribution port 7 of the flow distribution channel A of the flow distribution valve group is connected with the left working cavity Wa of the single-conveying-cylinder double-acting reciprocating pump (such as a hydraulic piston type slurry pump) through only one pipeline, and the flow distribution port 7 of the flow distribution channel B is connected with the right working cavity Wb of the single-conveying-cylinder double-acting reciprocating pump (such as a hydraulic piston type slurry pump) through only one pipeline. When the piston of the reciprocating pump moves to the right, slurry enters the flow distribution valve from the slurry main inlet 3 and flows into the left working chamber Wa through the suction valve 5 and the flow distribution port 7 of the flow distribution channel A, and simultaneously slurry in the right working chamber Wb is sent to a load connected with the slurry main outlet 4 through the flow distribution port 7, the discharge valve 6 and the slurry main outlet 4 of the flow distribution channel B; when the piston of the reciprocating pump moves to the left, slurry enters the flow distribution valve from the slurry main inlet 3, flows through the suction valve 5 and the flow distribution port 7 of the flow distribution channel B and enters the right working chamber Wb, and simultaneously, the slurry in the left working chamber Wa is sent to a load connected with the slurry main outlet 4 through the flow distribution port 7, the discharge valve 6 and the slurry main outlet 4 of the flow distribution channel A.
The above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and those skilled in the art can make many possible variations and modifications to the technical solution of the present invention or modify equivalent embodiments using the technical content disclosed above without departing from the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention, unless the technical essence of the present invention departs from the content of the technical solution of the present invention.
Claims (9)
1. The utility model provides a reciprocating pump is with joining in marriage a class valves, includes the valve body, set up two at least passageways that join in marriage in the valve body, its characterized in that:
each distribution channel shares a slurry main inlet and a slurry main outlet, each distribution channel is respectively provided with a suction valve, a discharge valve and a distribution port, and the suction valve and the discharge valve in the same distribution channel are connected with a working cavity of a reciprocating pump conveying cylinder through the same distribution port;
the suction valve and the discharge valve are all one-way valves, each one-way valve comprises a valve core and a valve seat, a slurry channel is arranged on each valve seat, each valve core is installed in each slurry channel, and a sealing structure is arranged between each valve core and each slurry channel.
2. The valve set for the reciprocating pump according to claim 1, wherein the sealing structure is a soft seal or a soft-hard composite seal formed by combining a hard seal pair and a soft seal pair; the hard sealing pair comprises a metal joint surface arranged between a slurry channel of the valve seat and the valve core, the metal joint surface comprises a metal seat arranged at the outlet end of the slurry channel of the valve seat, and a first conical surface or spherical surface seal is formed between the metal seat and the valve core; the soft sealing pair comprises an elastic seat arranged on the metal seat, and a second conical surface or spherical surface seal is formed between the elastic seat and the valve core.
3. The valve block for a reciprocating pump according to claim 2, wherein the elastic seat is fixed to the metal seat by a detachable pressing plate.
4. The valve assembly of claim 2, wherein the resilient seat is made of a polymeric resilient material.
5. The valve block for a reciprocating pump according to claim 2, wherein the metal seat is detachably connected to the valve body.
6. The valve set according to claim 1, wherein the valve body has a two-stage structure formed by detachably connecting an upper stage and a lower stage, the upper stage is provided with the slurry main outlet, the lower stage is provided with the flow distribution channel and the slurry main inlet, and a joint surface of the upper stage and the lower stage is provided with a sealing ring.
7. The valve set according to claim 1, wherein the valve body has a three-section structure in which an upper section, a middle section and a lower section are detachably connected in sequence, the upper section is provided with the slurry main outlet, the middle section is provided with the distribution port and the distribution channel, the lower section is provided with the slurry main inlet, and a joint surface between the upper section and the middle section and a joint surface between the middle section and the lower section are respectively provided with a sealing ring.
8. A reciprocating pump comprising two delivery cylinders, each having at least one working chamber, and a valve block, characterized in that the valve block is as claimed in any one of claims 1 to 7, one working chamber of a delivery cylinder being connected to a port of a port channel of the valve block by only one conduit.
9. A reciprocating pump comprising a delivery cylinder with two working chambers and a valve block, characterized in that the valve block is as claimed in any one of claims 1-7, one working chamber of the delivery cylinder being connected to a port of a port channel of the valve block by only one pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220214373.9U CN216975213U (en) | 2022-01-26 | 2022-01-26 | Flow distribution valve group for reciprocating pump and reciprocating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220214373.9U CN216975213U (en) | 2022-01-26 | 2022-01-26 | Flow distribution valve group for reciprocating pump and reciprocating pump |
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| Publication Number | Publication Date |
|---|---|
| CN216975213U true CN216975213U (en) | 2022-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220214373.9U Active CN216975213U (en) | 2022-01-26 | 2022-01-26 | Flow distribution valve group for reciprocating pump and reciprocating pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216975213U (en) |
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- 2022-01-26 CN CN202220214373.9U patent/CN216975213U/en active Active
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