CN111734621A - An emulsion plunger pump and its pump head assembly - Google Patents

Abstract

The invention discloses a pump head assembly of an emulsion plunger pump, comprising: a pump head body, the pump head body has a hollow chamber, and the hollow chamber extends along a first direction; a suction valve assembly and a discharge valve assembly, The suction valve assembly and the discharge valve assembly are sequentially installed in the hollow chamber along the first direction; the suction valve assembly includes a suction valve seat and a suction valve core, and the discharge valve assembly includes a discharge valve seat and a discharge valve core; The hollow chamber is provided with two liquid discharge ports on the liquid discharge side of the liquid discharge valve assembly, and the two liquid discharge ports extend respectively along the second direction to form the liquid discharge channel of the pump head assembly, and the first direction is perpendicular to the second direction Two liquid discharge ports are symmetrically arranged on both sides of the axial direction of the liquid discharge valve core, along the radial direction of the liquid discharge valve core, the liquid discharge section of the liquid discharge port and the liquid discharge valve core have a gap. The invention solves the problem that the liquid discharge valve core of the existing emulsion plunger pump is easily subjected to hydraulic shock. The invention also discloses a plunger pump adopting the above-mentioned pump head assembly.

Description

An emulsion plunger pump and its pump head assembly

technical field

The invention relates to an emulsion pump, in particular to an emulsion plunger pump.

Background technique

Emulsion pump is a device that uses emulsion or water as a medium, converts electrical energy or other energy into mechanical energy, performs work on the emulsion through the internal structure, and then converts it into hydraulic energy of the emulsion. The emulsion pump provides hydraulic power for the working face hydraulic support and is the heart of the entire working face hydraulic system. In recent years, with the increasing number of working faces with large mining heights in my country, in order to meet the high support resistance, high working resistance of large mining height hydraulic supports, as well as the needs of rapid frame shifting and safety support, the demand for emulsion plunger pump stations Reliability puts forward higher requirements.

The specific chamber structure of the pump head body in the liquid end of the emulsion pump, the suction valve assembly and the discharge valve assembly are the main components of the emulsion inlet and outlet. The design of its structure and performance is directly related to the smooth suction and operation of the working liquid. The discharge has a crucial influence on the working efficiency of the working liquid medium in the emulsion pump and the stability of the flow field.

At present, the design forms of the suction and discharge valve components of the emulsion pump are various, and the functions are becoming more and more perfect. At the same time, there are also many problems, such as: 1. The discharge port of the existing emulsion pump is directly opposite to the discharge valve core, and the valve core is easy to Due to the hydraulic impact of other adjacent chambers, the reliability of liquid discharge is poor; 2. Due to the unreasonable design of the suction and discharge valve seat and valve core structure of the existing emulsion pump, the displacement of the emulsion pump is relatively high. 3. In the structure of the existing emulsion pump, the suction and discharge valve cores are single-guided structures, which are prone to partial wear and premature failure of the seal; 4. The suction valve seat and suction valve core of the existing emulsion pump , Drain valve seat, drain valve core, plunger, sealing packing, plunger guide copper sleeve and other wearing parts are difficult to replace, with long maintenance time and high cost.

SUMMARY OF THE INVENTION

The first technical problem to be solved by the present invention is the problem that the drain valve core of the existing emulsion plunger pump is susceptible to the hydraulic impact of the emulsion in other chambers.

For the above-mentioned technical problems, the present invention provides the following technical solutions:

A pump head assembly of an emulsion plunger pump, comprising: a pump head body, the pump head body has a hollow chamber, the hollow chamber extends along a first direction; a suction valve assembly and a discharge valve assembly , the suction valve assembly and the discharge valve assembly are sequentially installed in the hollow chamber along the first direction; the suction valve assembly includes a suction valve seat and a suction valve core, and the discharge valve assembly includes a suction valve seat and a suction valve core. The valve assembly includes a liquid discharge valve seat and a liquid discharge valve core; the hollow chamber is provided with two liquid discharge ports on the liquid discharge side of the liquid discharge valve assembly, and the two liquid discharge ports are respectively along the second direction Extending to form a liquid discharge channel of the pump head assembly, the first direction is perpendicular to the second direction; two liquid discharge ports are symmetrically arranged on both sides of the axial direction of the liquid discharge valve core, along the In the radial direction of the liquid discharge valve core, the liquid discharge section of the liquid discharge port has a gap with the liquid discharge valve core.

In some embodiments of the present invention, the liquid suction valve seat/the liquid discharge valve seat is formed into a sleeve shape, and the end of the liquid suction valve seat/the liquid discharge valve seat is provided with a first mating surface; The liquid suction valve core/the liquid discharge valve core includes: a valve core head, a main guide part, and a connecting part connecting the valve core head and the main guide part; the valve core head is provided with the first guide part. A second mating surface matched with a mating surface; the main guide portion includes an annular wall and a connecting rib connecting the annular outer wall and the connecting portion, and the annular wall is slidably matched with the inner wall of the suction valve seat.

In some embodiments of the present invention, the first matching surface and the second matching surface are formed as conical surfaces.

In some embodiments of the present invention, the suction valve assembly/the discharge valve assembly further includes a valve stop member, and a reset is provided between the valve stop member and the suction valve core/the discharge valve core The end of the stop valve is provided with a guide hole; the suction valve core/the drain valve core also includes a guide guide part, and the guide guide part and the main guide part are respectively arranged on the On both sides of the spool head, the guide portions are slidably connected in the guide holes.

In some embodiments of the present invention, the suction valve seat and the pump head body and the discharge valve seat and the pump head body are respectively fitted through a tapered surface clearance.

In some embodiments of the present invention, the pump head body is radially formed with a coaxial first through hole and a second through hole in the region between the liquid suction assembly and the liquid discharge assembly, and the first through hole is radially formed. The hole is used to communicate with the hydraulic conversion component, and the hydraulic conversion component is used for converting mechanical power into the hydraulic change of the pump head assembly; the second through hole is provided with a blocking component, and the blocking component uses to block the hollow cavity.

In some embodiments of the present invention, the diameter of the first through hole or the second through hole is larger than the axial or radial dimension of any part of the suction valve assembly.

In some embodiments of the present invention, the pump head assembly further includes an electromagnetic overflow valve and a safety valve, and the electromagnetic overflow valve and the safety valve are located at two ends of the liquid discharge channel respectively; A first liquid distribution plate is arranged between the flow valve and the pump head body, and the first liquid distribution plate is used for converging the two liquid discharge channels and then transporting them to the electromagnetic overflow valve; the safety valve and the A second liquid distribution plate is arranged between the pump head bodies, and the second liquid distribution plate is used for connecting one of the drainage channels with the safety valve.

The invention also discloses an emulsion plunger pump, which comprises: a crankcase assembly, which is used for connecting with a main drive motor to transmit power; the above-mentioned pump head assembly, which is used for pumping the emulsion; and a hydraulic conversion assembly connected between the crankcase assembly and the pump head assembly, the hydraulic conversion assembly is used for converting the mechanical power of the crankcase into the hydraulic change of the pump head assembly.

In some embodiments of the present invention, the hydraulic conversion assembly includes: a packing seat assembly; and a plunger slidably connected in the packing seat assembly, and one end of the plunger is connected to the crankcase assembly, The other end extends into the hollow chamber.

The technical solution of the present invention has the following technical effects relative to the prior art:

In the emulsion plunger pump and pump head assembly disclosed in the present invention, since two liquid discharge ports and liquid discharge channels are provided, and the liquid discharge section of the liquid discharge port and the liquid discharge valve core have a gap, the liquid discharge is During the process, the liquid flow between adjacent liquid discharge ports will not pass through the liquid discharge valve core, and will not cause hydraulic impact to the liquid discharge valve core, thereby improving the liquid discharge reliability of the plunger pump.

Further, in the emulsion plunger pump and pump head assembly disclosed in the present invention, the suction valve seat/discharge valve seat adopts a sleeve structure, and the suction valve core/discharge valve core adopts the structure of annular wall and connecting ribs. On the one hand, the annular wall can cooperate with the inner wall of the suction valve seat to form a guiding effect, and the annular surface is used for contact and sliding, which has a large contact area and good stress; A liquid flow channel is formed between the annular wall and the connecting column and the valve seat. Compared with the existing structure of the valve core and the valve seat, the flow area between the valve core and the valve seat of the invention is larger, Make the displacement of the emulsion pump larger.

Further, in the emulsion plunger pump and the pump head assembly disclosed in the present invention, the taper surface clearance fit is adopted between the suction valve seat and the pump head body and between the discharge valve seat and the pump head body. , The valve seat is easy to assemble, and the suction valve seat and the discharge valve seat can realize self-positioning when they are installed; at the same time, they can be preloaded by themselves under the pressure of the emulsion, and the work is reliable.

Further, in the emulsion plunger pump and pump head assembly disclosed in the present invention, the suction valve core and the suction valve seat and the liquid discharge valve core and the discharge valve seat cooperate with each other through the conical surface. The sealing performance between them is better, and at the same time, the wear can be compensated by itself to prolong the service life. In addition, the suction valve seat and the discharge valve seat and the suction valve core and the discharge valve core are designed in the same size, which improves the versatility of parts and greatly reduces the design, processing and maintenance costs.

Further, in the emulsion plunger pump and pump head assembly disclosed in the present invention, the pump head body is radially formed with coaxial first through holes and second through holes in the region between the liquid suction assembly and the liquid discharge assembly. The hole, the diameter of the first through hole or the second through hole is larger than the axial or radial dimension of any part in the suction valve assembly. In this way, the suction valve seat, the suction valve core, the return spring and the second valve stop member of the suction valve assembly can all be assembled and disassembled through the first through hole or the second through hole. The above structural design can complete the installation and disassembly of the suction valve assembly without disassembling the liquid supply pipeline and the liquid discharge valve assembly, which greatly improves the maintainability of the emulsion pump.

Description of drawings

The preferred embodiments of the present invention will be described in detail below through the accompanying drawings, which will help to understand the purpose and advantages of the present invention, wherein:

Fig. 1 is the perspective view of the emulsion plunger pump provided by the present invention;

2 is a cross-sectional view of the pump head assembly of the emulsion plunger pump provided by the present invention;

3 is an enlarged cross-sectional view of the pump head assembly of the emulsion plunger pump provided by the present invention;

4 is a schematic structural diagram of a pump head body in the emulsion plunger pump provided by the present invention;

Fig. 5 is A-A sectional view in Fig. 4;

Fig. 6 is B-B in Fig. 4 sectional view;

7 is a schematic structural diagram of the suction valve seat/discharge valve seat of the emulsion plunger pump provided by the present invention;

8 is a schematic structural diagram of a suction valve core/discharge valve core in the emulsion plunger pump provided by the present invention;

9 is a schematic structural diagram of the first valve stop member in the emulsion plunger pump provided by the present invention;

10 is a schematic structural diagram of the second valve stop member in the emulsion plunger pump provided by the present invention;

11 is a schematic diagram of the shape and internal flow channel of the first liquid distribution plate in the emulsion plunger pump provided by the present invention;

FIG. 12 is a schematic diagram of the shape and internal flow channel of the second liquid distribution plate in the emulsion plunger pump provided by the present invention.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

Figure 1 shows a specific embodiment of an emulsion plunger pump disclosed in the present invention. The emulsion plunger pump of this embodiment is a five-plunger emulsion plunger pump. The emulsion plunger pump includes three parts; the first part is the crankcase assembly 300 for connecting with the main drive motor to transmit power; the second part is the pump head assembly 100 for pumping the emulsion; the third Part of it is a hydraulic conversion assembly 200 for converting the mechanical power of the crankcase into the hydraulic change of the pump head assembly 100, wherein one end of the hydraulic conversion assembly 200 is connected to the crankcase assembly 300, and the other end is connected to the crankcase assembly 300. The pump head assembly 100 is connected.

2-3 are specific implementations of a pump head assembly of an emulsion plunger pump disclosed in the present invention. The pump head assembly 100 includes a pump head body 101 and a pump head body located in the pump head body 101. The suction valve assembly 102 and the discharge valve assembly 103.

As shown in FIGS. 3-6 , the pump head body 101 has a hollow chamber 101S, and the hollow chamber 101S extends along a first direction; as shown in FIG. 3 , the first direction in this embodiment is arrow A direction shown. In one embodiment, the hollow chamber 101S of the pump head body 101 is arranged through two ends along the first direction A, and the openings on both sides are the suction chamber inlet 101C and the liquid discharge chamber sealing port 101D respectively; 101 is connected to a suction box (not shown in the figure) on the side of the suction chamber inlet 101C to connect with the liquid supply end of the emulsion, and the discharge chamber sealing port 101D is finally blocked by the discharge chamber plug 107 .

As shown in FIG. 3 , the suction valve assembly 102 and the discharge valve assembly 103 are sequentially installed in the hollow chamber 101S along the first direction A; the suction valve assembly 102 includes a suction valve A seat 1021 and a suction valve core 1022, the discharge valve assembly 103 includes a discharge valve seat 1031 and a discharge valve core 1032;

Wherein, the hollow chamber 101S is provided with two liquid discharge ports 101E on the liquid discharge side of the liquid discharge valve assembly 103, and the two liquid discharge ports 101E respectively extend along the second direction to form the pump head assembly. As shown in FIG. 6 , in this embodiment, the second direction is the direction shown by arrow B, and the first direction is perpendicular to the second direction; two liquid discharge ports 101E are symmetrically arranged on both sides of the drain valve core 1032 in the axial direction, along the radial direction of the drain valve core 1032, in the direction shown by arrow C as shown in FIG. 3, the drain port 101E There is a gap between the drain cross section and the drain valve core 1032.

Since the liquid discharge port 101E in the existing multi-plunger pump is facing the liquid discharge valve core 1032, during the liquid discharge process, the liquid discharge port 101E will inevitably pass through the The discharge valve core 1032, when the discharge pressure is high, will cause fluid flow disturbance and impact to the discharge valve core 1032; in the above-mentioned emulsion plunger pump of the present invention, due to the two discharge ports 101E and the liquid discharge The channel 101F, and the liquid discharge section of the liquid discharge port 101E has a gap with the liquid discharge valve core 1032. During the liquid discharge process, the liquid flow between the liquid discharge ports 101E will not pass through the liquid discharge valve core 1032, and will not pass through the discharge valve core 1032. It will cause hydraulic shock to the liquid discharge valve core 1032, and the reliability of liquid discharge is greatly improved.

In order to increase the displacement of the emulsion pump and increase the effective flow area of the suction valve assembly 102 and the discharge valve assembly 103, the suction valve assembly 102 and the discharge valve assembly 103 adopt the following structures:

As shown in FIG. 7 , the suction valve seat 1021 and the discharge valve seat 1031 are formed into a sleeve shape, and the ends of the suction valve seat 1021 and the discharge valve seat 1031 are provided with a first fitting face 1A;

As shown in FIG. 8 , the suction valve core 1022 and the liquid discharge valve core 1032 include a valve core head 2A, a main guide portion 2B, and a connecting portion connecting the valve core head 2A and the main guide portion 2B 2C; the valve core head 2A is provided with a second mating surface that cooperates with the first mating surface 1A; the main guide portion 2B includes an annular wall 2B1 and a connecting rib 2B2 connecting the annular wall 2B1 and the connecting portion 2C , the annular wall 2B1 is slidingly matched with the inner wall of the suction valve seat 1021 .

The suction valve assembly 102 and the discharge valve assembly 103 have the same structure, which is convenient for processing and manufacture; since the suction valve core 1022 and the discharge valve core 1032 adopt the structure of the annular wall 2B1 and the connecting ribs 2B2, on the one hand, the annular wall 2B1 It can cooperate with the inner wall of the suction valve seat 1021 to form a guiding effect, and it can contact and slide through the annular surface, and its contact area is large and the force is good; For the columnar body extending in the first direction, the diameter of the connecting portion 2C only needs to ensure the strength of the valve core; in this way, a liquid flow channel is formed between the connecting rib 2B2 and the annular wall 2B1, and a liquid is formed between the connecting column and the valve seat. Compared with the existing structure of the valve core and the valve seat, the flow channel of the present invention has a larger flow area between the valve core and the valve seat, so that the displacement of the emulsion pump is larger.

Specifically, the first matching surface 1A is a conical surface formed on the inner wall ends of the suction valve seat 1021 and the liquid discharge valve seat 1031 , and the second matching surface is formed on the valve core head 2A The tapered surface at the end of the lower surface of the 1A; the first mating surface 1A and the second mating surface are formed into conical surfaces. The suction valve core 1022 and the suction valve seat 1021 and the discharge valve core 1032 and the discharge valve seat 1031 cooperate with each other through the conical surface, so that the sealing between the two is better, and at the same time, the compensation can be realized by itself after wear and tear. ,Extended service life.

More specifically, the suction valve seat 1021 and the discharge valve seat 1031 and the suction valve core 1022 and the discharge valve core 1032 are designed with the same size, which improves the versatility of parts and greatly reduces the design processing and maintenance costs.

Specifically, as shown in FIG. 3 , FIG. 9 and FIG. 10 , the suction valve assembly 102 and the liquid discharge valve assembly 103 further include a valve stop member, the valve stop member and the suction valve core 1022 and A return spring 104 is arranged between the valve stop member and the drain valve core 1032 . The restoring force of the restoring spring 104 can make the suction channel of the suction valve assembly 102 close, and the discharge channel 101F of the discharge valve assembly 103 to be closed.

In order to further improve the eccentric wear of the suction valve core 1022 and the liquid discharge valve core 1032 and prolong the service life. The liquid suction valve core 1022 and the liquid discharge valve core 1032 of the present invention adopt a dual guide positioning method. Specifically, a guide hole 1051C/1052C is provided at the end of the stop valve; the suction valve core 1022 and the liquid discharge valve core 1032 further include a guide portion 2D, which is slidably connected to the guide portion 2D. In the guide holes 1051C/1052C, the guidance guide portion 2D and the main guide portion 2B are respectively disposed on both sides of the valve core head 2A, so that the suction valve core 1022 and the discharge valve The core 1032 is dual-guided and positioned through the main guide portion 2B and the guide guide portion 2D respectively, so that the valve core moves along its axis direction, so as to avoid the existing structure where the suction valve core 1022 and the liquid discharge valve core 1032 are guided in one direction, resulting in The problem of the spool shaking and eccentric wear.

Specifically, the valve stop member of the drain valve assembly 103 is a first valve stop member 1051. As shown in FIG. 9 , the first valve stop member 1051 includes a plug 1051A and an extension column 1051B. The plug 1051A and the extension column 1051B are respectively formed into a column shape, the plug 1051A is used to achieve sealing cooperation with the pump head body 101 through a sealing ring, the extension column 1051B is used to install the return spring 104, and the extension column 1051B The guide hole 1051C is formed at the end of the guide hole 1051C. In order to make the guide direction part 2D slide smoothly, a copper sleeve is arranged in the guide hole 1051C, and the guide guide part 2D is slidably connected with the copper sleeve.

Specifically, the liquid discharge chamber of the pump head body 101 is blocked by the liquid discharge chamber blocking cover 107, and the liquid discharge chamber blocking cover 107 is located outside the first valve stop member 1051, and the liquid discharge chamber is blocked The cover 107 is connected with the pump head body 101 through threads.

Specifically, the valve stop member of the suction valve assembly 102 is a second valve stop member 1052. As shown in FIG. 10 , the second valve stop member 1052 includes a clamping portion 1052A, a spring mounting portion 1052B, and a connecting portion 1052B. The transition portion 1052D between the two, the snap portion 1052A is used for snapping on the pump head body 101 to realize the first direction limit of the first valve stop member 1051, and the spring mounting portion 1052B is used for The return spring 104 is installed, and the guide hole 1052C is formed at the end of the spring installation portion 1052B. Similarly, in order to make the guide portion 2D slide smoothly, a copper sleeve is provided in the guide hole 1052C, and the guide portion 2D is slidably connected to the copper sleeve.

More specifically, as shown in FIG. 5 , the pump head body 101 is provided with a snap groove 101G, and the snap portion 1052A is a partial ring extending along the radial direction of the suction valve core 1022 . The connecting portion 1052A is inserted into the engaging groove 101G to realize the positioning of the second valve stop member 1052 . In order to reduce the size of the second valve stop member 1052 and facilitate its disassembly and assembly, the latching portion 1052A is two partial rings arranged symmetrically, the arc of the partial rings is less than 90°, and the spring mounting portion The 1052B is formed as a cylinder and is spaced apart from the engaging portion 1052A by a set distance along the first direction, and the transition portion 1052D is formed to be connected between the partial circular ring and the cylindrical body to form a partial conical ring.

Specifically, as shown in FIG. 3 , the suction valve seat 1021 and the pump head body 101 and the liquid discharge valve seat 1031 and the pump head body 101 are respectively fitted through a conical surface clearance, and the conical surface The matching method can make the suction valve seat 1021 and the liquid discharge valve seat 1031 self-positioning when installed; at the same time, it can be pre-tightened by itself under the pressure of the emulsion, and the work is reliable. At the same time, the clearance fit method can make the valve seat Assembly and disassembly are convenient and quick. Specifically, the tapered surface adopts an inverted tapered surface that is wide at the top and narrow at the bottom, so that the suction valve seat 1021 and the liquid discharge valve seat 1031 can be quickly positioned. More specifically, a sealing ring 108 is also provided between the suction valve seat 1021 and the pump head body 101 and the discharge valve seat 1031 and the pump head body 101 , and the sealing ring 108 is used to realize the gap between the two. sealed connection.

As shown in FIG. 3 and FIG. 5 , the pump head body 101 is radially formed with coaxial first through holes 101A and second through holes 101B in the region between the liquid suction assembly and the liquid discharge assembly. The first through hole 101A is used to communicate with the hydraulic conversion component, and the hydraulic conversion component is used for converting mechanical power into the hydraulic change of the pump head assembly 100; the second through hole 101B is provided with a plugging component 106, the blocking component 106 is used to block the hollow chamber 101S. Specifically, the blocking assembly 106 includes a blocking sealing member 1062 and a blocking connecting member 1061. The blocking sealing member 1062 is located inside the blocking connecting member 1061 and is in sealing connection with the pump head body 101. The plug connector 1061 is threadedly connected with the pump head body 101 .

Wherein, the diameter of the first through hole 101A or the second through hole 101B is larger than the axial or radial dimension of any part of the suction valve assembly 102 . In this way, the suction valve seat 1021 , the suction valve core 1022 , the return spring 104 and the second valve stop member 1052 of the suction valve assembly 102 can all be assembled and disassembled through the first through hole 101A or the second through hole 101B . The above structural design can complete the installation and disassembly of the suction valve assembly 102 without disassembling the liquid supply pipeline and the liquid discharge valve assembly 103, which greatly improves the maintainability of the emulsion pump.

The pump head assembly 100 also includes an electromagnetic overflow valve and a safety valve (not shown in the figure). The emulsion is transported to the hydraulic system through the electromagnetic overflow valve after passing through the discharge channel 101F. Passage 101F communicates to sense the flow pressure and perform overflow relief at a certain pressure threshold. The electromagnetic relief valve and the safety valve are respectively located at both ends of the liquid discharge channel 101F; wherein, as shown in FIG. 11 , a first liquid distribution plate is arranged between the electromagnetic relief valve and the pump head body 101 . 109. The first liquid distribution plate 109 is used for converging the two discharge channels 101F and then transporting them to the electromagnetic relief valve; as shown in FIG. A second liquid distribution plate 110 is arranged between them, and the second liquid distribution plate 110 is used to connect one of the liquid discharge channels 101F with the safety valve.

By adopting the structures of the first liquid distribution plate 109 and the second liquid distribution plate 110, it is not necessary to change the original structure of the electromagnetic relief valve and the safety valve, which reduces the design and manufacture cost of the plunger pump.

Specifically, the hydraulic conversion assembly 200 of the above-mentioned emulsion plunger pump includes:

a packing seat assembly 201, the packing seat assembly 201 is located outside the first through hole 101A of the pump head body 101;

and a plunger 202 slidably connected to the packing seat assembly 201 , one end of the plunger 202 is connected to the crankcase assembly 300 , and the other end extends into the first through hole 101A.

The pump head assembly 100 and the hydraulic conversion assembly 200 of the emulsion plunger 202 pump in the present invention can be assembled according to the following steps.

Step 1: Insert the O-ring 108 into the sealing groove of the suction valve seat 1021, and pass the suction valve seat 1021 with the sealing ring 108 through the first through hole 101A or the second through hole 101B of the pump head body 101 Put it into the taper hole of the suction chamber, and tap the suction valve seat 1021 with a copper rod to make it tightly fit with the pump head body 101;

Step 2: Put the suction valve core 1022, the return spring 104 and the second valve stop 1052 in sequence through the first through hole 101A or the second through hole 101B of the pump head body 101, and use special tooling to remove the pump head from the pump head Press down the installed second valve stop member 1052 at the upper opening of the pump body 101, and then rotate the second valve stop member 1052 so that the clamping part is clamped into the clamping groove in the pump head body 101, so that it is in the pump head body 101. The pump head body 101 is positioned axially, and at this time, the assembly of the suction valve assembly 102 is completed;

Step 3: Put the O-ring 108 into the sealing groove of the drainage valve seat 1031, and put the drainage valve seat 1031 with the sealing ring 108 into the cone of the drainage cavity through the opening on the upper side of the pump head body 101 hole, and tap the drain valve seat 1031 lightly with a copper rod to make it fit closely with the pump head body 101;

Step 4: Assemble the drain valve core 1032, the return spring 104 and the first stop valve 1051 in sequence through the opening on the upper side of the pump head body 101, and seal the drain chamber through the drain chamber cover 107, At this point, the assembly of the drain valve assembly 103 is completed;

Step 5: Install the packing seat assembly 201 at the first through hole 101A of the pump head body 101, and install the plunger 202 into the packing seat assembly 201; at this time, the hydraulic conversion assembly 200 is completed. assembly;

Step 6: Put the O-ring 108 into the sealing groove of the sealing member 1062, put the sealing member 1062 into the second through hole 101B of the pump head body 101, and then plug the connecting member 1061 Threaded with the pump head body 101; at this time, the assembly of the blocking assembly 106 is completed;

Step 7: Install the first dosing plate 109 and the second dosing plate 110 on the assembly completed in step 6 by screws. The first dosing plate 109 and the pump head body 101 and the second dosing plate 110 and the pump The head bodies 101 are sealed with an O-ring; at this time, the assembly of the emulsion plunger 202 is completed.

When it is necessary to disassemble the suction valve assembly 102, the following steps are used:

Step 1: the assembly of described hydraulic conversion assembly 200 is dismantled;

Step 2: Disassemble the second valve stop member 1052, the return spring 104, the suction valve core 1022 and the suction valve seat 1021 in the suction valve assembly 102 from the first through hole 101A side in turn;

So far, the disassembly of the suction valve assembly 102 is completed. In this solution, the disassembly and assembly of the suction valve assembly 102 in the pump head body 101 can be completed without disassembling the liquid supply pipeline, which is convenient for maintenance.

Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. And the obvious changes or changes derived from this are still within the protection scope of the present invention.

Claims (10)

1. A pump head assembly of an emulsion plunger pump, comprising:

the pump head body is provided with a hollow cavity, and the hollow cavity extends along a first direction;

the liquid suction valve assembly and the liquid discharge valve assembly are sequentially arranged in the hollow cavity along the first direction; the liquid suction valve assembly comprises a liquid suction valve seat and a liquid suction valve core, and the liquid discharge valve assembly comprises a liquid discharge valve seat and a liquid discharge valve core; the method is characterized in that:

the hollow cavity is provided with two liquid discharge ports on a liquid discharge side of the liquid discharge valve assembly, the two liquid discharge ports respectively extend along a second direction to form a liquid discharge channel of the pump head assembly, and the first direction is perpendicular to the second direction;

the two liquid discharge ports are symmetrically arranged on two sides of the axis direction of the liquid discharge valve core, and a gap is reserved between the liquid discharge section of the liquid discharge port and the liquid discharge valve core along the radial direction of the liquid discharge valve core.

2. A pump head assembly for an emulsion plunger pump, as recited in claim 1, wherein:

the liquid suction valve seat/the liquid discharge valve seat are formed into a sleeve shape, and the end part of the liquid suction valve seat/the liquid discharge valve seat is provided with a first matching surface;

the suction valve spool/the discharge valve spool includes:

the valve comprises a valve core head, a main guide part and a connecting part for connecting the valve core head and the main guide part;

the valve core head is provided with a second matching surface matched with the first matching surface; the main guide part comprises an annular wall and a connecting rib for connecting the annular outer wall with the connecting part, and the annular wall is in sliding fit with the inner wall of the liquid suction valve seat.

3. A pump head assembly for an emulsion plunger pump as recited in claim 2, wherein:

the first matching surface and the second matching surface are formed into conical surfaces.

4. A pump head assembly for an emulsion plunger pump as recited in claim 2, wherein:

the liquid suction valve assembly/the liquid discharge valve assembly also comprises a valve stop member, and a return spring is arranged between the valve stop member and the liquid suction valve core/the liquid discharge valve core; the end part of the valve stopping part is provided with a guide hole; the liquid suction valve core/the liquid discharge valve core further comprises auxiliary guide parts, the auxiliary guide parts and the main guide parts are respectively arranged on two sides of the valve core head, and the auxiliary guide parts are connected in the guide holes in a sliding mode.

5. A pump head assembly for an emulsion plunger pump as recited in claim 1, wherein:

the liquid suction valve seat is in clearance fit with the pump head body and the liquid discharge valve seat is in clearance fit with the pump head body through conical surfaces.

6. A pump head assembly for an emulsion plunger pump as recited in claim 1, wherein:

the pump head body is provided with a first through hole and a second through hole which are coaxial along the radial direction in the area between the liquid suction component and the liquid discharge component, the first through hole is used for being communicated with a hydraulic conversion component, and the hydraulic conversion component is used for converting mechanical power into hydraulic change of the pump head assembly; and a plugging component is arranged in the second through hole and used for plugging the hollow cavity.

7. A pump head assembly for an emulsion plunger pump as recited in claim 6, wherein:

the first or second through hole has a bore diameter greater than the axial or radial dimension of any of the components of the pipette assembly.

8. A pump head assembly for an emulsion plunger pump as recited in claim 1, wherein:

the pump head assembly further comprises an electromagnetic overflow valve and a safety valve, and the electromagnetic overflow valve and the safety valve are respectively positioned at two ends of the liquid drainage channel;

a first liquid distribution plate is arranged between the electromagnetic overflow valve and the pump head body, and the first liquid distribution plate is used for converging the two liquid discharge channels and then conveying the converged liquid discharge channels to the electromagnetic overflow valve;

and a second liquid distribution plate is arranged between the safety valve and the pump head body and is used for communicating one of the liquid drainage channels with the safety valve.

9. An emulsion plunger pump, which is characterized in that: it includes:

the crankcase assembly is used for being connected with the main driving motor to transmit power;

a pumphead assembly as claimed in any one of claims 1 to 8, for pumping an emulsion;

and a hydraulic conversion component connected between the crankcase assembly and the pump head assembly, wherein the hydraulic conversion component is used for converting mechanical power of the crankcase into hydraulic change of the pump head assembly.

10. The emulsion plunger pump of claim 9, wherein:

the hydraulic conversion assembly includes:

a packing seat assembly;

and the plunger is slidably connected in the packing seat assembly, one end of the plunger is connected with the crankcase assembly, and the other end of the plunger extends into the hollow cavity.

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