CN219932320U

CN219932320U - Fuel electromagnetic pump of combustor

Info

Publication number: CN219932320U
Application number: CN202321657679.2U
Authority: CN
Inventors: 潘文清
Original assignee: Wenling Bairan Machinery Co ltd
Current assignee: Wenling Bairan Machinery Co ltd
Priority date: 2023-06-28
Filing date: 2023-06-28
Publication date: 2023-10-31
Anticipated expiration: 2033-06-28

Abstract

The utility model provides a fuel electromagnetic pump of a combustor, and belongs to the technical field of machinery. The electromagnetic pump solves the problem that the working stability of the existing electromagnetic pump is poor. The fuel electromagnetic pump of the burner comprises a pump pipe and an iron core arranged in the pump pipe, wherein a coil assembly for driving the iron core to move downwards is arranged outside the pump pipe, a guide sleeve is vertically fixed in the pump pipe, an upper spring which enables the iron core to move upwards is arranged outside the guide sleeve, an ejector rod is arranged in the guide sleeve, the upper end of the ejector rod is fixedly connected with the iron core, a liquid discharge pipe is fixed in the lower end of the pump pipe, an upper port of the pump pipe is communicated with the liquid discharge pipe through an inner hole of the guide sleeve, a rubber ring is fixed at the bottom of the guide sleeve, the inner diameter of the rubber ring is larger than or equal to that of the guide sleeve, and the upper side of the rubber ring is in contact sealing with the guide sleeve; a ball and a lower spring which enables the ball to have upward movement trend are arranged between the guide sleeve and the liquid discharge pipe, and under the action of the lower spring, the ball can seal the lower port of the rubber ring. The fuel electromagnetic pump of the burner works stably.

Description

Fuel electromagnetic pump of combustor

Technical Field

The utility model belongs to the technical field of machinery, and relates to an electromagnetic pump, in particular to a fuel oil electromagnetic pump of a combustor.

Background

The burner is a device for ejecting fuel and air in a certain manner to burn and mix, and is classified into a fuel burner and a gas burner according to the type of fuel.

Electromagnetic pumps are important components of fuel burners for controlling fuel delivery. An existing electromagnetic pump is a ball valve type two-position three-way switching electromagnetic valve (application number: 01247556.4) disclosed in China patent library, and consists of a valve body, a guide seat, a push rod, a steel ball, a spring, a valve seat, a pole shoe, a coil and an armature pipe, wherein an oil inlet and an oil outlet are formed in the valve body, the guide seat, a lower valve seat and an upper valve seat are arranged in a hole, the steel ball is arranged between the lower valve seat and the upper valve seat, the push rods on two sides penetrate through an upper valve seat hole and a lower valve seat Kong Dingzhu steel ball, the spring is arranged on the push rod on one side, the push rod on the other side is arranged in the pole shoe hole, and the armature pipe and the coil are arranged outside the pole shoe; the contact parts of the lower side valve seat hole and the upper side valve seat hole with the steel ball are spherical surfaces.

In the electromagnetic valve, the steel ball is pressed on the upper side valve seat under the action of the spring, and hard seal is formed between the steel ball and the upper side valve seat, the sealing performance of the electromagnetic valve is completely carried out by the spring, the sealing effect is easy to lose efficacy, and the normal work is influenced.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides a burner fuel electromagnetic pump which works stably.

The aim of the utility model can be achieved by the following technical scheme: the electromagnetic fuel pump for the burner comprises a pump pipe and an iron core vertically arranged in the pump pipe, wherein a coil assembly for driving the iron core to move downwards is arranged outside the pump pipe, a guide sleeve is vertically fixed in the pump pipe, an upper spring which enables the iron core to move upwards is arranged outside the guide sleeve, an ejector rod is vertically arranged in the guide sleeve, the upper end of the ejector rod extends out of the guide sleeve and is fixedly connected with the iron core, a liquid discharge pipe is fixed in the lower end of the pump pipe, and an upper port of the pump pipe is communicated with the liquid discharge pipe through an inner hole of the guide sleeve; a ball and a lower spring which enables the ball to have upward movement trend are arranged between the guide sleeve and the liquid discharge pipe, and under the action of the lower spring, the ball can press on the rubber ring and block the lower port of the rubber ring; the ball is rigid, and the ball and the lower spring are both made of non-magnetic materials.

The elastic soft seal is formed between the rubber ring and the ball at the bottom of the guide sleeve, so that the sealing effect and the sealing duration between the guide sleeve and the rubber ring can be effectively improved, and the working stability of the electromagnetic pump can be improved.

Meanwhile, the ball is in hard contact with the ejector rod and does not deform, so that adhesion formed between the rubber ring and the ball is effectively eliminated, the ball is ensured to stably move downwards to conduct the liquid discharge pipe and the guide sleeve, and the fuel is normally conveyed, so that the device has the advantage of good working stability.

Further, the round ball is matched with the lower spring and the rubber ring to prevent reflux, and the self material is used for being in hard contact with the ejector rod to get rid of the viscosity of the rubber ring, that is, the utility model can ensure the whole stable work by only arranging a one-way structure consisting of the round ball, the lower spring and the rubber ring, and has the advantages of simple structure and convenient assembly.

In the above-mentioned burner fuel electromagnetic pump, the lower spring is located in the drain pipe, and both ends of the lower spring act on the ball and the inner wall of the drain pipe respectively. The lower spring is accommodated in the liquid discharge pipe, so that the whole length of the electromagnetic pump can be effectively shortened, the whole structure is more compact, and the space occupation is reduced.

In the fuel electromagnetic pump of the burner, the liquid discharge pipe is detachably and fixedly connected with the pump pipe.

In the fuel electromagnetic pump of the burner, the annular groove matched with the rubber ring is formed in the bottom wall of the pump pipe, the ring body is clamped and positioned between the liquid discharge pipe and the guide sleeve, the ring body is sleeved outside the ball, the rubber ring is positioned in the annular groove, two sides of the rubber ring are respectively pressed on the bottom wall of the annular groove and the ring body, namely, the rubber ring is clamped and positioned between the liquid discharge pipe and the guide sleeve, and therefore the rubber ring can be easily taken down to be replaced after the liquid discharge pipe is dismounted, and subsequent maintenance is facilitated.

In the fuel electromagnetic pump of the burner, the axial section of the annular groove is L-shaped, and the outer side wall of the rubber ring is pressed on the inner wall of the annular groove. By adopting the design, the whole radial length of the electromagnetic pump can be reduced, so that the space occupation is further reduced.

In the fuel electromagnetic pump of the burner, the axial section of the rubber ring is round matched with the sphere, namely, in an actual product, the rubber ring is a standard part, and the rubber ring is easy to obtain from the market, so that the production and maintenance cost is reduced.

In the fuel electromagnetic pump of the burner, the liquid discharge pipe is axially and slidably connected with the pump pipe, and a sealing ring I for sealing the liquid discharge pipe and the inner side wall of the pump pipe is arranged on the outer wall of the liquid discharge pipe; the liquid discharge pipe and the pump pipe are detachably fixed through a locking structure. By adopting the design, the ball is axially moved to be pressed on the rubber ring during installation, the pretightening force formed between the ball and the rubber ring is reduced, and the ball is ensured to be easier to separate from the first sealing ring under the top pressure of the ejector rod.

In the above-mentioned combustor fuel electromagnetic pump, the locking structure includes the pressure cap of spiro union outside the pump line lower extreme, presses the shaping on the cap inner wall to have annular to keep off the shoulder, has annular pressure portion on the fluid-discharge tube outer wall, annular pressure portion and pump line sliding connection, and the both ends face of annular pressure portion sticis respectively on ring body and annular fender shoulder.

In the fuel electromagnetic pump of the burner, the annular pressing part consists of the annular convex part formed on the outer wall of the liquid discharge pipe and the first sealing ring, the two end faces of the annular pressing part are respectively pressed on the upper side of the first sealing ring and the annular body, and the lower side of the sealing ring is pressed on the annular retaining shoulder, so that the sealing path formed between the liquid discharge pipe and the pump pipe can be prolonged and the working stability can be improved on the premise of ensuring that the liquid discharge pipe is stably positioned.

In the fuel electromagnetic pump of the burner, the inner hole at the upper end of the liquid discharge pipe is a taper hole, and the aperture of the taper hole is gradually reduced downwards, so that the fuel is smoothly discharged into the liquid discharge pipe.

Compared with the prior art, the fuel electromagnetic pump of the burner has the following advantages:

1. the elastic soft seal is formed between the rubber ring and the ball at the bottom of the guide sleeve, so that the sealing effect and the sealing time between the guide sleeve and the sealing ring can be effectively improved, and the working stability of the electromagnetic pump is improved.

2. The ball and the ejector rod are in hard contact and do not deform, so that adhesion formed between the rubber ring and the ball is effectively eliminated, the ball is ensured to stably move downwards to conduct the liquid discharge pipe and the guide sleeve, and the fuel is normally conveyed, so that the device has the advantage of good working stability.

3. The ball is matched with the lower spring and the rubber ring to prevent reflux, and the rubber ring is prevented from being viscous by utilizing the hard contact of the self material and the ejector rod, namely, the utility model can ensure the whole stable work by only arranging a unidirectional structure consisting of the ball, the lower spring and the rubber ring, and has the advantages of simple structure and convenient assembly.

Drawings

Fig. 1 is a schematic perspective view of a fuel electromagnetic pump of the burner.

Fig. 2 is a schematic cross-sectional structure of the fuel electromagnetic pump of the present burner.

In the figure, 1, a pump tube; 2. an iron core; 3. a coil assembly; 4. a liquid inlet pipe; 5. a liquid discharge pipe; 5a, annular protruding portions; 5b, taper holes; 6. guide sleeve; 7. a spring is arranged; 8. a push rod; 9. a rubber ring; 10. a ball; 11. a lower spring; 12. a ring body; 13. a first sealing ring; 14. pressing the cap; 14a, annular shoulder.

Description of the embodiments

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 1 and 2, the present burner fuel electromagnetic pump includes a pump pipe 1, an iron core 2 vertically disposed inside the pump pipe 1, and a coil assembly 3 disposed outside the pump pipe 1 for driving the iron core 2 to move downward. The structure and the installation mode of the coil assembly 3 are existing, and are not described in detail herein.

In particular the number of the elements,

the two ends of the pump pipe 1 are respectively provided with a liquid inlet pipe 4 and a liquid outlet pipe 5, and the liquid inlet pipe 4, the liquid outlet pipe 5 and the pump pipe 1 are coaxially arranged. The liquid inlet pipe 4 is in threaded connection in the pump pipe 1, the upper end of the liquid inlet pipe 4 extends out of the pump pipe 1, and the lower end of the liquid inlet pipe 4 and the pump pipe 1 are sealed by a second sealing ring; the liquid discharge pipe 5 is detachably and fixedly connected with the pump pipe 1, and the lower end of the liquid discharge pipe 5 extends out of the pump pipe 1.

A guide sleeve 6 made of a non-magnetic material is also vertically fixed in the pump tube 1, and the guide sleeve 6 is coaxial with the pump tube 1. The side wall of the lower end of the guide sleeve 6 forms a seal with the inner wall of the pump pipe 1 through a third sealing ring, and at the moment, the liquid inlet pipe 4 is communicated with the liquid outlet pipe 5 through the inner hole of the guide sleeve 6. As shown in fig. 1, the guide sleeve 6 is sleeved with an upper spring 7 made of a non-magnetic material, two ends of the upper spring 7 respectively act on the iron core 2 and the guide sleeve 6, and under the action of the upper spring 7, the iron core 2 can move upwards and press against the bottom wall of the liquid inlet pipe 4. A push rod 8 made of non-magnetic materials is vertically arranged in the guide sleeve 6, and the push rod 8 and the guide sleeve 6 are coaxial. The diameter of the ejector rod 8 is smaller than the inner diameter of the guide sleeve 6, so that fuel flows in a gap between the ejector rod 8 and the guide sleeve 6. The upper end of the ejector rod 8 extends out of the guide sleeve 6 and is fixedly connected with the iron core 2.

As shown in fig. 2, a rubber ring 9 coaxial with the guide sleeve 6 is fixed at the bottom of the guide sleeve 6, the inner diameter of the rubber ring 9 is larger than or equal to that of the guide sleeve 6, and the upper side of the rubber ring 9 is in contact sealing with the guide sleeve 6. A ball 10 and a lower spring 11 which enables the ball 10 to move upwards are arranged between the guide sleeve 6 and the liquid discharge pipe 5, and under the action of the lower spring 11, the ball 10 can press on the rubber ring 9 and block the lower port of the rubber ring 9; the ball 10 has rigidity, and the ball 10 and the lower spring 11 are both made of a nonmagnetic material.

An elastic soft seal is formed between the rubber ring and the ball 10 at the bottom of the guide sleeve 6, so that the sealing effect and the sealing time between the guide sleeve 6 and the sealing ring can be effectively improved, and the working stability of the electromagnetic pump can be improved.

Meanwhile, when the device is used, the ball 10 and the ejector rod 8 are in hard contact and do not deform, so that adhesion between the rubber ring 9 and the ball 10 is effectively eliminated, the ball 10 is ensured to stably move downwards to conduct the liquid discharge pipe 5 and the guide sleeve 6, and the fuel is normally conveyed, so that the device has the advantage of good working stability. Meanwhile, the round ball 10 is matched with the lower spring 11 and the rubber ring 9 to prevent reflux, and the self material is used for being in hard contact with the ejector rod 8 to get rid of the viscosity of the rubber ring 9, that is, the utility model can ensure the whole stable work only by arranging a unidirectional structure consisting of the round ball 10, the lower spring 11 and the rubber ring 9, and has the advantages of simple structure and convenient assembly.

In the present embodiment of the present utility model, in the present embodiment,

the ball 10 is made of austenitic stainless steel or plastic material, and preferably the ball 10 is a solid plastic body.

The lower spring 11 is mounted as follows: the lower spring 11 is positioned in the liquid discharge pipe 5, and two ends of the lower spring 11 respectively act on the ball 10 and the inner wall of the liquid discharge pipe 5. The lower spring 11 is accommodated in the liquid discharge pipe 5, so that the whole length of the electromagnetic pump can be effectively shortened, the whole structure is more compact, and the space occupation is reduced.

The axial section of the rubber ring 9 is circular matched with the ball 10, and the rubber ring 9 is installed in the following way: an annular groove matched with the rubber ring 9 is formed in the bottom wall of the pump pipe 1, a ring body 12 is clamped and positioned between the liquid discharge pipe 5 and the guide sleeve 6, namely two end faces of the ring body 12 are respectively pressed on the top wall of the liquid discharge pipe 5 and the bottom wall of the guide sleeve 6. The ring body 12 is sleeved outside the ball 10, the rubber ring 9 is arranged in the annular groove, two sides of the rubber ring 9 are respectively pressed on the bottom wall of the annular groove and the ring body 12, namely, the rubber ring 9 is clamped and positioned between the liquid discharge pipe 5 and the guide sleeve 6, and thus, the rubber ring 9 can be easily taken down to replace after the liquid discharge pipe 5 is dismounted, and the subsequent maintenance is convenient. Further, the annular groove is L-shaped in axial cross section, and the outer side wall of the rubber ring 9 presses against the inner wall of the annular groove. By adopting the design, the whole radial length of the electromagnetic pump can be reduced, so that the space occupation is further reduced.

The drain pipe 5 is connected to the pump pipe 1 as follows: the liquid discharge pipe 5 is axially and slidably connected with the pump pipe 1, and a sealing ring I13 for sealing the liquid discharge pipe 5 and the inner side wall of the pump pipe 1 is arranged on the outer wall of the liquid discharge pipe 5; the drain pipe 5 and the pump pipe 1 are detachably fixed through a locking structure. By adopting the design, the ball 10 is axially moved to be pressed on the rubber ring 9 during installation, the pretightening force formed between the ball 10 and the rubber ring is reduced, and the ball 10 is ensured to be easier to separate from the first sealing ring 13 under the top pressure of the ejector rod 8.

The locking structure comprises a pressing cap 14 which is in threaded connection with the outside of the lower end of the pump pipe 1, an annular blocking shoulder 14a is formed on the inner wall of the pressing cap 14, an annular pressing part is arranged on the outer wall of the liquid discharge pipe 5 and is in sliding connection with the pump pipe 1, and two end faces of the annular pressing part are respectively pressed on the ring body 12 and the annular blocking shoulder 14 a. The annular pressing part consists of an annular convex part 5a formed on the outer wall of the liquid discharge pipe 5 and the first sealing ring 13, two end faces of the annular pressing part are respectively pressed on the upper side of the first sealing ring 13 and the ring body 12, the lower side of the first sealing ring 13 is pressed on the annular blocking shoulder 14a, and the sealing path formed between the liquid discharge pipe 5 and the pump pipe 1 can be prolonged on the premise of ensuring that the liquid discharge pipe 5 is stably positioned, so that the working stability is improved. Naturally, it is also possible that the annular pressing portion is only the annular protruding portion 5a, and in this case, an annular positioning groove for mounting the first seal ring 13 is provided on the annular protruding portion 5 a.

In actual products, the side wall of the guide sleeve 6 is also provided with a liquid guide hole communicated with the inner hole of the guide sleeve 6 so as to accelerate the flow of fuel; the inner hole at the upper end of the liquid discharge pipe 5 is a taper hole 5b, and the aperture of the taper hole 5b gradually decreases downwards to play a role in drainage, so that the fuel oil is smoothly discharged into the liquid discharge pipe 5.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims

1. The utility model provides a combustor fuel electromagnetic pump, including pump line (1) and iron core (2) of vertical setting in pump line (1), coil pack (3) that are used for driving iron core (2) to move down are equipped with outward in pump line (1), still vertical guide pin bushing (6) are fixed with in pump line (1), be equipped with in guide pin bushing (6) and make iron core (2) have upper spring (7) of upward trend, vertically be equipped with ejector pin (8) in guide pin bushing (6), ejector pin (8) upper end stretches out guide pin bushing (6) and links firmly with iron core (2), pump line (1) lower extreme internal fixation has fluid-discharge tube (5), pump line (1) upper port is through guide pin bushing (6) hole intercommunication fluid-discharge tube (5), characterized in that, guide pin bushing (6) bottom is fixed with guide pin bushing (6) coaxial rubber circle (9), rubber circle (9) internal diameter is greater than or equal to guide pin bushing (6) internal diameter, and rubber circle (9) upside and guide pin bushing (6) contact seal; a ball (10) and a lower spring (11) which enables the ball (10) to move upwards are arranged between the guide sleeve (6) and the liquid discharge pipe (5), and under the action of the lower spring (11), the ball (10) can be pressed on the rubber ring (9) and can seal the lower port of the rubber ring (9); the ball (10) has rigidity, and the ball (10) and the lower spring (11) are both made of a nonmagnetic material.

2. A burner fuel electromagnetic pump according to claim 1, characterized in that the lower spring (11) is located in the drain pipe (5), and both ends of the lower spring (11) act on the ball (10) and the inner wall of the drain pipe (5), respectively.

3. Burner fuel electromagnetic pump according to claim 1, characterized in that the drain pipe (5) is detachably fastened to the pump pipe (1).

4. A burner fuel electromagnetic pump according to claim 3, characterized in that the bottom wall of the pump pipe (1) is provided with an annular groove matched with the rubber ring (9), a ring body (12) is clamped and positioned between the liquid discharge pipe (5) and the guide sleeve (6), the ring body (12) is sleeved outside the ball (10), the rubber ring (9) is positioned in the annular groove, and two sides of the rubber ring (9) are respectively pressed on the bottom wall of the annular groove and the ring body (12).

5. A burner fuel electromagnetic pump according to claim 4, characterized in that the annular groove is L-shaped in axial section and the outer side wall of the rubber ring (9) presses against the inner wall of the annular groove.

6. Burner fuel electromagnetic pump according to claim 4 or 5, characterized in that the rubber ring (9) has an axial section of a circle matching the sphere (10).

7. The electromagnetic fuel pump for the burner according to claim 4, wherein the liquid discharge pipe (5) is axially and slidably connected with the pump pipe (1), and a sealing ring I (13) for sealing the liquid discharge pipe (5) and the inner side wall of the pump pipe (1) is arranged on the outer wall of the liquid discharge pipe (5); the liquid discharge pipe (5) and the pump pipe (1) are detachably fixed through a locking structure.

8. The electromagnetic fuel pump of claim 7, wherein the locking structure comprises a pressing cap (14) screwed outside the lower end of the pump pipe (1), an annular blocking shoulder (14 a) is formed on the inner wall of the pressing cap (14), an annular pressing part is arranged on the outer wall of the liquid discharge pipe (5), the annular pressing part is in sliding connection with the pump pipe (1), and two end faces of the annular pressing part are respectively pressed on the ring body (12) and the annular blocking shoulder (14 a).

9. The electromagnetic fuel pump of claim 8, wherein the annular pressing part is composed of an annular convex part (5 a) formed on the outer wall of the liquid discharge pipe (5) and the first sealing ring (13), two end faces of the annular pressing part are respectively pressed on the upper side of the first sealing ring (13) and the ring body (12), and the lower side of the first sealing ring (13) is pressed on the annular blocking shoulder (14 a).

10. The electromagnetic fuel pump of the burner according to claim 1, wherein the inner hole at the upper end of the liquid discharge pipe (5) is a taper hole (5 b), and the aperture of the taper hole (5 b) is gradually reduced downwards.