CN106904364B

CN106904364B - Pressing pump

Info

Publication number: CN106904364B
Application number: CN201510977392.1A
Authority: CN
Inventors: 丁要武
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-12-23
Filing date: 2015-12-23
Publication date: 2019-04-02
Anticipated expiration: 2035-12-23
Also published as: CN106904364A

Abstract

A kind of Pressing pump includes: cylinder；Facing, cylinder are connected on facing；Pressure head, pressure head have outer ring and inner ring, and inner ring extends downwardly into the inside of cylinder, and outer ring is connected with facing；And piston, piston are connected to the lower part of inner ring；Wherein, pressure head can move between latched position and open position, in latched position, the outer ring of pressure head is fixed on facing, and in open position, pressure head is moved upwards, so that outer ring is detached from the contact with facing, and the lower end of inner ring still extends to the inside of facing or cylinder.Pressing pump configuration of the invention is simple, and each part is easy to mould.

Description

Pressing pump

Technical field

The present invention relates to a kind of Pressing pumps, more particularly to a kind of Pressing pump of four formulas.

Background technique

Traditional push type liquid pump or emulsion pumps are usually made of multiple parts.For example, Fig. 6 a and 6b show one kind Common push type liquid pump 100 on the market at present, the liquid pump include pressure head 110 and the piston rod being connected with pressure head 120, Piston rod 120 extends downwardly on the downside of pressure head 110 and enters cylinder 130, is connected with piston 140 in the lower end of piston rod 120.Liquid Body pump 100 further includes cylinder head 150 and facing 160.Cylinder head 150 is mounted on cylinder 130, and is connected with facing 160, tooth There is internal screw thread, which matches with the external screw thread at the vessel port for being equipped with aforesaid liquid pump, thus will on set 160 Liquid pump is mounted on container.

Other than above-mentioned main component, traditional push type liquid pump further includes spring 170, gasket, ball Other auxiliary components such as 180.

For the pump of the traditional liquid shown in Fig. 6 a and 6b, its structure is complicated, and number of parts is more, therefore assembly technology It is more complicated, so that production efficiency is low, and high production cost.Moreover, in use, since its number of parts is more, mutually Between connection relationship it is complicated, therefore the risk to break down also rises, its service life is caused not grown.

Even, it if client needs colored part, needs parts such as pressure head, facing, cylinder head, cylinder, piston rods all It is fabricated to colored part, which further improves the complexity of production and production costs.

As the improvement of traditional push type liquid pump to above structure complexity, recently it is proposed that a kind of new liquid Pump configuration, which greatly reduce the quantity of part.Fig. 7 a and 7b show the structural schematic diagram of this liquid pump 100 '.From figure As it can be seen that the liquid pump includes pressure head 110 ', the piston rod 120 ' being connected to below pressure head 110 ', facing 130 ' and cylinder 140 ', Wherein original cylinder head is played the role of on the top of facing 130 ', is connected to the top of cylinder 140 '.

The liquid pump structure of this structure is simple, and main part mainly includes four, i.e. pressure head 110 ', piston rod 120 ', facing 130 ' and cylinder 140 ', therefore number of parts is reduced, assembling also simplifies.But since part is reduced, in order to Ensure to realize that the function of liquid pump, the structure of each part are designed to be more complicated, especially the structure of piston rod, such as schemes Shown in 7a and 7b, both ends are relatively large in diameter, and mid diameter is smaller, therefore need to make Hough (half) mould during fabrication.Hough The difficulty of processing of mould is larger, and processing efficiency is not also high, therefore the production efficiency of part is relatively low always.

Therefore, a kind of Pressing pump with improvement structure is needed, still in order to manufacture and assemble.

Summary of the invention

The present invention is made based on above state of the art, and the purpose is to provide a kind of improved Pressing pump, this is pressed Press pump number of parts is few, and each design of part is simple, so as to manufacture the Pressing pump in high efficiency and low cost.

Above-mentioned purpose of the invention passes through a kind of following Pressing pump, which includes:

Cylinder；

Facing, cylinder are connected on facing；

Pressure head, pressure head have outer ring and inner ring, and inner ring extends downwardly into the inside of cylinder, and outer ring is connected with facing；With And

Piston, piston are connected to the lower part of inner ring；

Wherein, pressure head can move between latched position and open position, be fixed in the outer ring of latched position, pressure head On facing, in open position, pressure head is moved upwards, so that outer ring is detached from the contact with facing, and the lower end of inner ring still extends to The inside of the facing or the inside of the cylinder.

In above-mentioned pressing pump configuration of the invention, even the inner ring of pressure head still extends when pressure head is in using position To the inside of cylinder, this makes it possible to piston is directly connected on pressure head, the inner ring lower part of specifically pressure head.As a result, The structure of piston rod is omitted.Also, the structure for incorporating the pressure head of piston rod function is also fairly simple, is easy to mould, and just In assembling.

A kind of connection type between piston and the inner ring of pressure head is to be provided in the peripheral surface of the lower part of inner ring convex Ring is provided with concave ring in the inner peripheral surface on the top of piston, and bulge loop matches with concave ring.

Alternatively, the setting position of bulge loop and concave ring is exchanged, that is, concave ring is provided in the peripheral surface of the lower part of inner ring, it is living Bulge loop is provided in the inner peripheral surface on the top of plug, institute's concave ring matches with bulge loop.

In a kind of preferable structure, facing has facing inner hole, and the top of inner ring is formed with the sealing surface of protrusion, sealing Face is configured to, and in the state that pressure head is in the locked position, the inner surface of sealing surface and facing inner hole, which seals, to be cooperated.In this way, When pressure head is in the locked position, slot leakage of the liquid resided in cylinder between inner ring and facing can be prevented.

In another preferably structure, piston has the first reducing diameter part, and the first valve pearl is accommodated in the first reducing diameter part, There is the second reducing diameter part in ontology to form upper valve and/or cylinder, accommodate the second valve pearl in the second reducing diameter part, to be formed Lower valve.In this way, to form valve seat, this can simplify the structure of mold by forming reducing diameter part in piston and/or cylinder, it is easy to The molding of part.

As travel stop, it is formed with stage portion in facing inner hole, when ram movement is to stroke top dead center, piston Upper surface contacted with stage portion, prevent pressure head movement further up.

Preferably, the first valve pearl limiting device is provided in the top in the first reducing diameter part and the inner wall in piston, and/ Or the second valve pearl limiting device is provided in the top in the second reducing diameter part and the inner wall in cylinder body.Valve pearl limit dress Setting can prevent valve pearl from dropping out from valve seat.

Further, the first valve pearl limiting device and/or the second valve pearl limiting device are in sickle shaped.For such structure For valve pearl limiting device, by falculate shape, make the limiting device that there is certain elasticity.In this way, to part into When row molding, it can prevent limiting device during demoulding from being drawn deformation of collapsing.

In order to provide further sealing effect, the ontology of cylinder is arranged to include upper body and lower body, In, it extends to inside upper body to lower body portion, to extend to the outer of the part in upper body in lower body Annular space is formed between perimeter surface and the inner peripheral surface of upper body；And piston has skirt section, skirt section is by from piston Peripheral surface extends radially outwardly, extends still further below and formed；Wherein, the part for extending into upper body of lower body Annular protrusion is formed in peripheral surface, in the state that pressure head is in the locked position, the inner peripheral surface and annular protrusion in skirt section It is in sealing contact.

In addition, being provided with internal screw thread in the inner peripheral surface of the outer ring of pressure head, it is provided with external screw thread in the peripheral surface of facing, Internal screw thread matches with external screw thread, and internal screw thread and external screw thread are configured to, in the state that pressure head is in the locked position, interior spiral shell Line is completely in below external screw thread.

Preferably, internal screw thread and/or external screw thread herein is strong demoulding screw thread, i.e., formed by forced stripper mechanism mode Screw thread.

In another preferred construction, the facing includes upside minor diameter and downside major diameter portion, the external screw thread It is formed on the upside major diameter part, also, in the peripheral surface of the downside major diameter portion and the upside minor diameter It is raised up on levelling bench between portion and is formed with annular protrusion, wherein when the pressure head is in the latched position When, the inner peripheral surface of the annular protrusion and the peripheral surface of the outer ring contact with each other, alternatively, the annular protrusion Gap between inner peripheral surface and the peripheral surface of the outer ring is small to following degree, that is, the gap can be prevented because of institute It states outer ring radial and outward deformation and disengages the internal screw thread and the external screw thread mutually.

By between the inner peripheral surface of annular protrusion and the peripheral surface of outer ring it is such contact or small gap structure, It can be improved and pressure head is pulled down into required pulling-out force from facing in the state of latched position, exist to further increase emulsion pumps Reliability during transport etc..

Detailed description of the invention

Fig. 1 a shows the sectional view of Pressing pump of the invention, and wherein the pressure head of the Pressing pump is in the locked position.

Fig. 1 b shows another sectional view of Pressing pump of the invention, and wherein the pressure head of the Pressing pump is in an open position.

Fig. 2 a shows the sectional view of the pressure head of Pressing pump of the invention.

Fig. 2 b shows the enlarged drawing of the part A of pressure head shown in Fig. 2 a.

Fig. 3 a shows the sectional view of the piston of Pressing pump of the invention.

Fig. 3 b shows the top view of piston shown in Fig. 3 a.

Fig. 4 a shows the sectional view of the facing of Pressing pump of the invention.

Fig. 4 b shows the front view of the part B of facing shown in Fig. 4 a.

Fig. 5 a shows the sectional view of the cylinder of Pressing pump of the invention.

Figure 5b shows that the sectional views that the line I-I in Fig. 5 a is obtained.

Fig. 6 a and 6b show the Pressing pump of a type of prior art.

Fig. 7 a and 7b show the Pressing pump of the another type of prior art.

Specific embodiment

It is described the specific embodiments of the present invention in detail below in conjunction with attached drawing 1a~5b.It is to be appreciated that institute in attached drawing What is shown is only presently preferred embodiments of the present invention, and is not construed to limit the scope of the present.Those skilled in the art Various obvious modifications, modification, equivalence replacement can be carried out to the present invention on the basis of embodiment shown in the drawings, this It all falls within the scope and spirit of the invention a bit.

Herein it should also be noted that "up" and "down" as used herein etc. about the term in direction is relative to Pressing pump Be placed be vertically oriented (i.e. it is consistent with vertical direction to be configured to its axis direction for Pressing pump) and determine.

As seen in figure la and lb, Pressing pump 1 of the invention includes pressure head 10, facing 20, cylinder 30 and piston 40.The pressing It is additionally provided with spring 50 in pump 1, under the action of spring 50, the pressure head 10 of Pressing pump 1 can be from locking bit shown in Fig. 1 a It sets and moves to open position shown in Fig. 1 b.It is described in detail below in conjunction with each component part of the attached drawing to Pressing pump 1.

Fig. 2 a shows the sectional view of the pressure head 10 of Pressing pump 1, and Fig. 2 b is then the partial enlarged view of the part A in Fig. 2 a. As shown in Figure 2 a, pressure head 10 includes outlet 11, outer ring 12 and inner ring 13, wherein and outer ring 12 and inner ring 13 are the shape of tubular, and It is coaxially formed, is formed with inner cavity in inner ring 13, which is connected with the fluid channel in outlet 11, thus from being equipped with The liquid of the container of Pressing pump 1 of the invention can be flowed out via the inner cavity of inner ring 13 from outlet 11.

In the present invention, inner ring 13 extends downwardly longer than outer ring 12, thus in the mounted state of Pressing pump 1 Under, which extends to inside cylinder 30.Also, bulge loop 131 is provided on the outer peripheral surface of the lower part of inner ring 13, the bulge loop 131 match (as shown in Figure 3a) with the concave ring formed on piston 40, so as to which piston 40 to be connected directly between under inner ring 13 Portion.

The sealing surface 132 (more clearly illustrating in Fig. 2 b) of protrusion is formed on the outer peripheral surface on the top of inner ring 13.When When pressure head 10 is in latched position shown in Fig. 1 a, the inner hole of sealing surface 132 and facing 20, which seals, to be cooperated.

Fig. 3 a shows the sectional view of piston 40, and Fig. 3 b then shows the top view of piston 40.As shown in Figure 3a, piston 40 Ontology include upper piston area 41, piston lower portion 42 and the intermediate tapered between upper piston area 41 and piston lower portion 42 43, wherein upper piston area 41 has biggish internal diameter, and piston lower portion 42 has lesser internal diameter, the internal diameter of intermediate tapered 43 The smaller internal diameter for then tapering to piston lower portion 42 downwards from the larger interior diameter of upper piston area 41, to form the upper valve of Pressing pump 1 Valve seat, the first valve pearl 61 can be located at the valve seat in, to form the upper valve of Pressing pump 1.

Concave ring 411 is formed on the inner surface of upper piston area 41, as described above, the concave ring 411 is interior with pressure head 10 The bulge loop 131 enclosed on 13 lower, outer perimeter faces matches, so that piston 40 and the inner ring 13 of pressure head 10 be made to link together.

Connection structure between piston 40 and the inner ring 13 of pressure head 10 may also pass through change appropriate.For example, can be in piston Bulge loop is formed on the outer peripheral surface of 40 upper piston area 41, and forms the concave ring to match on the inner peripheral surface of the lower part of inner ring 13； Alternatively, can threadably connect between upper piston area 41 and inner ring 13, such as internal screw thread and external screw thread is respectively set, makees For to the replacement of bulge loop/concave ring structure.

Preferably, deviating to prevent the first valve pearl 61 from larger interior diameter one end of intermediate tapered 43, in upper piston area Transition department between 41 and intermediate tapered 43 is provided at least one first valve pearl limiting component 44.From Fig. 3 a as it can be seen that One illustrative first valve pearl limiting component 44 can be in sickle shaped, which assigns the first valve pearl limiting component 44 A degree of elasticity.

Transition department on the outer peripheral surface of piston 40, for example between upper piston area 41 and intermediate tapered 43 is provided with Skirt section 45, the skirt section 45 extend radially outwardly from the outer peripheral surface of piston 40 first, then extend downwardly, thus around piston 40 The outer peripheral surface of ontology is formed as tubular structure, to limit between the outer peripheral surface of the ontology of piston 40 and the inner peripheral surface in skirt section 45 Annular space 46 out.The skirt section 45 preferably with the ontology coaxial line of piston 40.

Fig. 4 a shows the sectional view of the facing 20 of Pressing pump 1, and Fig. 4 b shows part B in Fig. 4 a, i.e. facing 20 The amplification front elevation of upside minor diameter 21.As shown in fig. 4 a, the primary structure of facing 20 includes upside minor diameter 21 under Side major diameter portion 22.

Facing inner hole 212 is formed in upside minor diameter 21, the inner ring 13 of pressure head 10 may pass through the facing inner hole 212 and prolong It reaches inside cylinder 30.It is formed with external screw thread 211 in the peripheral surface of 21 downside of upside minor diameter, which can It is matched with the internal screw thread 121 formed in 12 inner peripheral surface of outer ring of pressure head 10, so that pressure head 10 be kept in the locking position.

Preferably, the external screw thread 211 of facing 20 and the internal screw thread 121 of pressure head 10 are the screw thread that strong stripping means are formed.

In addition, may also be formed at least one stage portion 213 in the facing inner hole 212 of upside minor diameter 21.Work as pressure First 10 when moving upward to its top dead centre under the action of spring 50, is connected to the piston 40 on 13 lower end of inner ring of pressure head 10 Upper surface will be contacted with the stage portion 213, to prevent pressure head 10 from moving further up, thus the stage portion 213 and piston 40 upper surface matches, and constitutes stop mechanism, goes out as shown in Figure 1 b.

Internal screw thread 221 is formed on the inner surface of downside major diameter portion 22, with the internal screw thread 221 correspondingly, be equipped with The oral area of the container (not shown) of Pressing pump 1 of the invention may be provided with external screw thread, when by by the downside major diameter of facing 20 The internal screw thread 221 in portion 22 is matched with the external screw thread of container finish, to the container by the installation of facing 20, to make entire Pressing pump 1 installation is to the container.

Further, approximate horizontal flat between the peripheral surface of downside major diameter portion 22 and upside minor diameter 21 It is raised up on platform and is formed with annular protrusion 23.As the sectional view of Fig. 4 a is clearly shown, annular protrusion 23 includes Outer wall, inner wall and the interconnecting piece being connected between outer wall and inner wall, so that annular space is formed inside annular protrusion 23, it should For the connection between facing 20 and cylinder 30, this will be described below annular space.

In addition, protruding portion 23 is also further arranged to, when pressure head 10 is in the locked position, the outer ring 12 of pressure head Between the inner peripheral surface (i.e. the inner peripheral surface of annular protrusion 23) of the inner wall of the annular protrusion 23 of peripheral surface and facing 20 It contacts with each other or gap between the inner peripheral surface and peripheral surface is sufficiently small, it is small to outer ring 12 can be prevented radially outward It is deformed to the degree for disengaging internal screw thread 121 and external screw thread mutually.In this way, when pressure head 10 is by upward pulling force, internal screw thread 121 and external screw thread 211 will not because outer ring 12 outward deform due to slip mutually.

Fig. 5 a shows the sectional view of the cylinder 30 of Pressing pump 1 of the invention, and Fig. 5 b be then in Fig. 5 a along I-I obtain The cut away view arrived.According to the exemplary structure of cylinder 30 shown in Fig. 5 a, cylinder 30 includes mounting portion 31 and is connected to mounting portion 31 lower section cylinder bodies, the cylinder body further comprise upper body 32, middle part 33 and lower body 34, wherein intermediate Portion 33 is partly extended to inside upper body 32, thus in the peripheral surface of middle part 33 and the inner peripheral surface of upper body 32 Between form annular space.Also, it is also formed at least in the peripheral surface that middle part 33 protrudes into the part of upper body 32 One annular protrusion 332.As shown in Figure 1a, when pressure head 10 is in the locked position, the skirt section 45 of piston 40 extends to top sheet In this annular space between body 32 and middle part 33, and it is in sealing contact to realize by the annular protrusion 332.

Stage portion 36 is formed between middle part 33 and lower body 34, which can support the another of spring 50 End.

It include tapered portion 341 in lower body 34, the internal diameter of the tapered portion 341 is tapered from top to bottom, presses to be formed The valve seat of the lower valve of press pump 1, the second valve pearl 62 can be placed on the valve seat.Also, it is similar with upper valve described above, be It prevents the second valve pearl 62 from deviating from, is additionally provided at least one second valve pearl limiting section 35 in the top of tapered portion 341, this second Valve pearl limiting section 35 is for example also in sickle-shaped.Preferably, can be set multiple second as shown in the I-I sectional view in Fig. 5 b Valve pearl limiting section 35, these the second valve pearl limiting sections 35 are circumferentially distributed along the inner wall of lower body 34.

Return to Fig. 1 a and 1b, the mutual position between each component of Pressing pump 1 of the invention further detailed below It sets and connection relationship, and illustrates the operating principle of Pressing pump 1.

As shown in Figure 1a, the pressure head 10 of Pressing pump 1 is in the locked position.Wherein, the inner ring 13 of pressure head 10 passes through facing 20 Facing inner hole 212 extend to inside cylinder 30, and the upside minor diameter of the internal screw thread 121 of the outer ring 12 of pressure head 10 and pressure head 10 External screw thread 211 in portion 21 matches.Piston 40 is connected to the lower part of inner ring 13 by manner discussed above.

The mounting portion 31 of cylinder 30 is inserted into the interior annular space of annular protrusion 23 of facing 20, and passes through installation The cooperation between concave ring 231 in bulge loop 311 in portion 31 and annular protrusion 23 and fix.

Spring 50 is provided between piston 40 and cylinder 30.Specifically, one end of spring 50 is accepted in piston 40 Skirt section 45 and piston 40 ontology between be formed by annular space 46, and the other end of spring 50 is supported on cylinder 30 In stage portion 36 between middle part 33 and lower body 34.Certainly, spring 50 can also pass through other knots commonly used in the art Structure is arranged in Pressing pump 1, and applies to piston 40 and then to pressure head 10 upward bias force.

In the state shown in Fig. 1 a, spring 50 is in compressed state, to apply upward biasing to piston 40 Power, but due between the external screw thread 211 in the upside minor diameter 21 of the internal screw thread 121 on the outer ring of pressure head 10 12 and facing 20 Cooperation so that pressure head 10 overcomes the bias force of spring 50 and keeps in the locking position.

At this point, as shown in Figure 1a, the facing inner hole 212 of sealing surface 132 and facing 20 on the inner ring 13 of pressure head 10 is close Contact, to form sealing cooperation.In addition, the upper body 32 of cylinder 30 is inserted into the skirt section 45 of piston 40 and middle part 33 protrudes into It is formed by annular space between part in the upper body 32, and the inner peripheral surface in skirt section 45 and middle part 33 are stretched Enter to be formed by the close contact of annular protrusion 332 at the part of upper body 32, to form additional sealing cooperation.Here, The inner peripheral surface in skirt section 45 is preferably smooth cylindrical surface.Further, the lower end of piston 40 extends to the lower part of cylinder 30 In ontology 34, and the outer diameter of the lower end of piston 40 be preferably equal to or slightly larger than lower body 34 internal diameter, to provide into one The sealing effect of step.

Further preferably, the internal screw thread 121 on the outer ring 12 of pressure head 10 is screwed into facing 20 completely in latched position Upside minor diameter 21 outer surface on external screw thread 211 lower section, in other words, in latched position, internal screw thread 121 does not have Exceed the part of external screw thread 211 upwards.

As shown in Figure 1 b, make to take off between the internal screw thread 121 of pressure head 10 and the external screw thread 211 of facing 20 by rotary press head 10 It opens, then pressure head 10 is pushed up together with piston 40 by spring 50, until the upper surface of piston 40 and the facing inner hole of facing 20 The stage portion 213 formed in 212 is in contact.As a result, by the upper surface of piston 40 and the contact of stage portion 213, pressure head is limited 10 stroke top dead center.At this point, the pressure head 10 of Pressing pump 1 is in an open position.

In open position, when user overcomes the bias force of spring 50 to press down on pressure head 10, cylinder 30 and piston Space between 40 is compressed, so that the fluid pressure in the space rises, the first valve pearl 61 is pressed upwards, is thus opened Valve, and the second valve pearl 62 of lower valve is then under the action of fluid pressure against valve seat, so that lower valve be made to be in close state.By This, under pressure, the liquid between cylinder 30 and piston 40 flows into the cavity in inner ring 13 via upper valve, and via out Fluid channel outflow in mouth 11.At this point, during pressure head 10 and piston 40 move downward, due to the outer diameter quilt in skirt section 45 It is set equal to or the internal diameter of the upper body 32 slightly larger than cylinder 30, therefore is formed between skirt section 45 and upper body 32 close Sealing-in touching, therefore ensures that the pressure in the space between cylinder 30 and piston 40.

Then, user removes the pressing force being applied on pressure head 10, and pressure head 10 and piston 40 are under the action of spring 50 It moves upwards.In the process, in the valve seat that the intermediate tapered 43 that the first valve pearl 61 falls back to piston 40 is constituted, thus on Valve is closed.As pressure head 10 and piston 40 rise, the space between cylinder 30 and piston 40 increases, and thus pressure therein subtracts It is small, so that the second valve pearl 62 rises under the action of container internal pressure, lower valve is opened, the liquid in container is allowed to add to gas In space between cylinder 30 and piston 40, to distribute Pressing pump 1 when pressing pressure head 10 next time.

Better embodiment of the invention is described in detail above.It will be apparent to those skilled in the art that can also be right The present invention carries out other deformations and modification, without beyond the scope of this invention.For example, in addition to above in description better embodiment In except already mentioned mode of texturing, following deformation can be also carried out to the present invention.

In above-mentioned preferred embodiment, tooth is realized by the mounting portion 31 of the annular protrusion 23 of facing 20 and cylinder 30 Connection between set 20 and cylinder 30.As an alternative, it is convenient to omit the mounting portion, directly in the peripheral surface of cylinder body Upper formation external screw thread, and internal screw thread is formed on facing 20, for example on the inner surface of upside minor diameter 21, pass through inside and outside spiral shell Cooperation between line is to realize the connection between facing 20 and cylinder 30.

In addition, cylinder body is shown as the tool part different there are three diameter in the structure of cylinder 30 shown in Fig. 5 a, That is upper body 32, middle part 33 and lower body 34, wherein the diameter of upper body 32 is maximum, and the diameter of lower body 34 is most It is small, and the diameter of middle part 33 is between two parties, and the stage portion between middle part 33 and lower body 34 can be used to support the one of spring End.And in a further arrangement, this structure of middle part 33 can be cancelled, that is, cylinder body only includes upper body and lower part sheet Body, the diameter of lower body is less than the diameter of upper body, and a part of lower body protrudes into inside upper body.It is placed in use In the structure of bearing spring, an annular protruding rib can be simply set in lower body.

It refers to seal cooperation at three under the lock state of pressure head 10 in the above preferred embodiment, that is, inner ring 13 Between sealing surface and the facing inner hole of facing 20, the annular protrusion 332 of the inner peripheral surface in the skirt section 45 of piston 40 and middle part 33 Between and piston 40 lower part and cylinder 30 lower body 34 inner surface between it is in sealing contact.Those skilled in the art Member it is found that this sealing cooperation can optional one at three.

In presently preferred embodiments of the present invention, the limiting component of valve pearl is in sickle-shaped, but be can also be used other in the prior art Common shape or structure.

In addition to the spring, also other way can be used to upwardly bias pressure head, for example, settable be connected to the interior of pressure head Circle and/or the elastic sheet material between piston and cylinder inner wall, or even the pressure of the liquid itself using storage in the cylinder.

Claims

1. a kind of Pressing pump, which is characterized in that the Pressing pump includes:

Cylinder；

Facing, the cylinder are connected on the facing；

Pressure head, the pressure head have outer ring and inner ring, and the inner ring extends downwardly into the inside of the cylinder, the outer ring and institute Facing is stated to be connected；And

Piston, the piston are connected directly between the lower part of the inner ring；

Wherein, the pressure head can move between latched position and open position, in the latched position, the institute of the pressure head Outer ring is stated to be fixed on the facing, in the open position, the pressure head is moved upwards so that the outer ring be detached from it is described The contact of facing, and the lower part for being connected with the inner ring of the piston still extend to the facing inside or the gas The inside of cylinder.

2. Pressing pump as described in claim 1, which is characterized in that be provided in the peripheral surface of the lower part of the inner ring Bulge loop is provided with concave ring in the inner peripheral surface on the top of the piston, and the bulge loop matches with the concave ring.

3. Pressing pump as described in claim 1, which is characterized in that be provided in the peripheral surface of the lower part of the inner ring Concave ring is provided with bulge loop in the inner peripheral surface on the top of the piston, and institute's concave ring matches with the bulge loop.

4. Pressing pump as described in claim 1, which is characterized in that the facing has facing inner hole, the top of the inner ring It is formed with the sealing surface of protrusion, the sealing surface is configured to, described in the state that the pressure head is in the latched position The inner surface of sealing surface and the facing inner hole, which seals, to be cooperated.

5. Pressing pump as described in claim 1, which is characterized in that the piston has the first reducing diameter part, in first contracting The first valve pearl is accommodated in diameter portion, in the ontology to form upper valve and/or the cylinder have the second reducing diameter part, described second The second valve pearl is accommodated in reducing diameter part, to form lower valve.

6. Pressing pump as claimed in claim 4, which is characterized in that stage portion is formed in the facing inner hole, when the pressure When head moves to stroke top dead center, the upper surface of the piston is contacted with the stage portion, prevents the pressure head further up Movement.

7. Pressing pump as claimed in claim 5, which is characterized in that first reducing diameter part top and in the piston Inner wall in be provided with the first valve pearl limiting device, and/or second reducing diameter part top and in the cylinder body The second valve pearl limiting device is provided in inner wall.

8. Pressing pump as claimed in claim 7, which is characterized in that the first valve pearl limiting device and/or second valve Pearl limiting device is in sickle shaped.

9. Pressing pump as described in claim 1, which is characterized in that the ontology of the cylinder includes upper body and lower part sheet Body, wherein extend to inside the upper body to the lower body portion, to be extended in the lower body described Annular space is formed between the peripheral surface of part in upper body and the inner peripheral surface of the upper body；And it is described Piston has skirt section, and the skirt section is formed and extending radially outwardly, extending still further below from the peripheral surface of the piston；Its In, convex annular is formed in the peripheral surface of the part for extending into the upper body of the lower body It rises, in the state that the pressure head is in the latched position, the inner peripheral surface in the skirt section connects with annular protrusion sealing Touching.

10. Pressing pump as described in claim 1, which is characterized in that be arranged in the inner peripheral surface of the outer ring of the pressure head There is internal screw thread, external screw thread is provided in the peripheral surface of the facing, the internal screw thread matches with the external screw thread, and described Internal screw thread and the external screw thread are configured to, and in the state that the pressure head is in the latched position, the internal screw thread is complete Below the external screw thread.

11. Pressing pump as claimed in claim 10, which is characterized in that the internal screw thread and/or the external screw thread demould to be strong Screw thread.

12. Pressing pump as claimed in claim 10, which is characterized in that the facing includes that upside minor diameter and downside are straight greatly Diameter portion, the external screw thread are formed on the upside major diameter part, also, in the peripheral surface of the downside major diameter portion and It is raised up on levelling bench between the upside minor diameter and is formed with annular protrusion,

Wherein, when the pressure head is in the latched position, the inner peripheral surface of the annular protrusion is outer with the outer ring Perimeter surface contacts with each other, alternatively, the gap between the inner peripheral surface of the annular protrusion and the peripheral surface of the outer ring is small To following degree, that is, the gap can prevent to make because of the outer ring radial and outward deformation internal screw thread and described outer Screw thread disengages mutually.