CN211500900U

CN211500900U - Plunger pump with pressure reduction pipeline

Info

Publication number: CN211500900U
Application number: CN201922072713.XU
Authority: CN
Inventors: 张俊杰; 杨登金
Original assignee: Zhejiang Xinjian Technology Co ltd
Current assignee: Zhejiang Xinjian Technology Co ltd
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2020-09-15
Anticipated expiration: 2029-11-26

Abstract

The utility model relates to a plunger pump among the water pump field, especially a plunger pump of area step-down pipeline. Only current protection to the plunger pump that current high pressure cleaning host computer was used, the inefficacy can lead to the motor to burn out and can not automatic recovery bring inconvenient problem for the user after shutting down, the utility model provides a take plunger pump of step-down pipeline, connect reduction gear between them including the motor and the pump body and transmission, be equipped with water inlet and delivery port on the pump body, connect between delivery port and the water inlet and set up a step-down pipeline, set up break-make subassembly between step-down pipeline and the delivery port and adjust the pipeline switching, open the step-down pipeline or close the step-down pipeline after water pressure reduces when delivery port water pressure is too big. The utility model discloses a step-down pipeline that can change automatic switching along with water pressure reduces delivery port one side water pressure, avoids exporting the water pressure increase and leads to external water pipe explosion to drop, and the motor need not shut down all the time normally when delivery port water pressure increases, more need not restart, and it is more convenient, safe to use.

Description

Plunger pump with pressure reduction pipeline

Technical Field

The utility model relates to a plunger pump among the water pump field, especially a plunger pump of area step-down pipeline.

Background

A common high-pressure cleaning machine for washing the automobile outputs high-pressure water flow to wash the surface of the automobile through a high-pressure plunger pump, and the dirt on the surface of the automobile is stripped and washed away by means of the ejected high-pressure water flow, so that the aim of cleaning the automobile is fulfilled. The plunger pump is an important device of a main machine part of the high-pressure cleaning machine, the plunger pump for the existing high-pressure cleaning machine is of an integrated structure, and specifically, a pump body, a motor and a speed reducer which is in transmission connection with the pump body and the motor form a whole machine. In order to ensure the normal operation of a machine and avoid that the water outlet pressure exceeds a safety value to cause that a water pipe externally connected with a water outlet is exploded and separated or the machine is overloaded and burns out a motor, current protection is arranged on the motor, the blocked rotating speed of the motor is reduced and the current is increased when an external pipeline on one side of the water outlet is blocked, and the current protection work carries out shutdown protection on the motor when the current is increased to a safety critical value, but the shutdown protection can be started only when the current reaches the safety critical value, once the current protection fails and mistakes are made, the motor is burnt out to influence the use of customers, and a plunger pump lacks other protections; after the external pipeline on one side of the treated water outlet is blocked, the motor needs to be restarted, the plunger pump can continue to work, the motor cannot automatically recover, and inconvenience is brought to a user.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem who solves and the technical task that provides are to the used plunger pump of current high pressure cleaning host computer only current protection, in case the inefficacy can lead to the motor to burn out and can not automatic recovery bring inconvenient scheduling problem for the user after shutting down, the utility model provides a take plunger pump of step-down pipeline, the plunger pump docks a water route that can change automatic switching along with the water pressure between plunger pump water inlet and delivery port and steps down the plunger pump to deal with delivery port one side water pressure crescent, avoid delivery port one side external water pipe to take place the booster and drop, the motor is normal operation throughout and does not shut down when delivery port water pressure crescent, more need not protect the shutdown then restart again, and it is more convenient and safe to use.

The utility model provides a technical scheme that technical problem adopted: the utility model provides a take plunger pump of step-down pipeline, includes motor and the pump body and the transmission reduction gear of connecting both, be equipped with water inlet and delivery port on the pump body, be equipped with conduit and plunger chamber and the plunger subassembly of activity in the pump body, characterized by connect between delivery port and the water inlet and set up a step-down pipeline, set up the switching of break-make subassembly regulation pipeline between step-down pipeline and the delivery port, the break-make subassembly can open the step-down pipeline when delivery port water pressure exceedes to inject or close the step-down pipeline when water pressure is less than to inject. The utility model discloses a connect one can be along with the step-down pipeline of the automatic switching break-make of delivery water pressure change between delivery port and water inlet, realize automatic step-down when plunger pump outlet one side water pressure is too big, specifically open the step-down pipeline automatically and get back to the water drainage that the delivery port was pumped into the mouth of a river and reduce delivery port one side water pressure, self-closing step-down pipeline when plunger pump outlet one side water pressure reduces to the certain degree, the motor need not shut down all the time in the normal operation among the whole water pressure accommodation process, more need not protect shutdown then restart, delivery port one side external water pipe also can not take place the booster because water pressure is too big and drop, the plunger pump uses more conveniently and safe secure. When the plunger pump works, when the water pressure of the external pipeline on one side of the water outlet exceeds the limit, the on-off assembly automatically opens the pressure reduction pipeline, the water outlet is communicated with the water inlet, and water flow with overlarge pressure at the water outlet can be conveyed back to the water inlet along the pressure reduction pipeline and enters the water conveying pipeline inside the plunger pump again to be pressurized and pumped out, so that water flow circulation is formed, and the situation that the water pressure at the water outlet continuously rises and is enlarged due to the blockage of the external pipeline on one; when the water pressure of the water outlet falls back to be less than the limit, the on-off assembly automatically closes the depressurization pipeline, the water outlet is communicated with the water inlet and is blocked, and at the moment, water at the water outlet does not flow back to the water inlet.

As further improvement and supplement to the above technical scheme, the utility model discloses a following technical measure: the delivery port has connect an outlet pipe, and the outside pump water of outlet pipe front end, rear end connection delivery port and be equipped with a backward flow chamber, return water hole intercommunication outlet pipe lumen is established to backward flow chamber front end, and the rear end opening connects the pressure reduction pipeline intercommunication water inlet, the break-make subassembly blocks water the return piece of blocking automatic return with promoting including locating mobilizable water blocking in the backward flow chamber, block water and tend to the return water hole to remove in order to block up the return water hole under the return piece effect, block water and be equipped with the backflow seal circle between stopper and the return water hole inner wall, backflow seal circle cover is put on the water blocking stopper outer wall or is inlayed and establish in the return water hole inner wall. A water outlet is connected with a water outlet pipe, and a backflow cavity is arranged at the position of the rear end of the water outlet pipe, which is butted with the water outlet of the plunger pump, so that the on-off component is installed; the water return component comprises a water return hole and a water return component, wherein the water return hole is provided with a water return hole, the water return component is arranged on the water return hole, and the water return component is connected with the water return hole; the sealing between the water blocking plug and the water return hole is realized by closing the water blocking plug and the water return hole and pressing a return sealing ring, the return sealing ring can be sleeved on the outer wall of the water blocking plug to be in a stable position or embedded on the inner wall of the water return hole to be installed and positioned, and when the return sealing ring is installed on one of the water blocking plug and the water return hole, a groove is required to be arranged for limiting. In addition, the pressure reduction pipeline connected between the reflux cavity and the water inlet of the plunger pump can be of a rigid structure or a hose structure, and the rigid structure can be used for directly manufacturing an integrated pipeline on the shell of the plunger pump; the hose structure is that a connecting pipe is arranged on the reflux cavity, and the connecting pipe is communicated with the water outlet through a hose.

The rear end of the backflow cavity is opened to form a mounting hole for placing the on-off assembly, and the mounting hole is sealed through a tail cover. The back end of the backflow cavity is opened and sealed by installing the tail cover, so that the on-off assembly can be conveniently placed into the backflow cavity from the mounting hole for assembly.

The tail cover is sleeved outside the mounting hole or penetrates into the mounting hole or is flatly covered on the end face of the mounting hole for fastening connection. The tail cover can be sleeved outside the open end where the mounting hole is located, can partially or completely penetrate into the mounting hole, and can be directly fixed on the open end face where the mounting hole is located through connecting pieces such as bolts.

The tail cover front section penetrates into the mounting hole to be fixedly connected through threads, an internal thread is arranged on the hole wall of the mounting hole, an external thread is arranged on the front section of the tail cover penetrating into the mounting hole, and an installation sealing ring is tightly pressed between the tail cover and the end face of the mounting hole. Preferably adopt the tail-hood anterior segment to penetrate the fastening of mounting hole internal thread connected mode, the tail-hood penetrates the part and establishes the external screw thread and the internal thread matching of establishing on the mounting hole pore wall, compresses tightly simultaneously between tail-hood exposed part and mounting hole terminal surface and sets up an installation sealing washer reinforcing seal effect, can set up an annular concave surface and come spacing installation sealing washer on the mounting hole terminal surface in reality.

The return water hole is a reducing hole, and the aperture of the reducing hole is gradually reduced from one side of the return cavity to one side of the water outlet pipe. The return water hole adopts the reducing hole, and the aperture is dwindled to outlet pipe one side undergauge by backward flow chamber one side, is convenient for block the return and blocks up the return water hole or is pushed open the return water hole.

The reducing hole is a tapered hole, the water blocking plug is a cone with a matched shape, the backflow sealing ring is nested on the annular side wall of the cone, and the annular side wall is provided with an embedding groove around the circumference to install the backflow sealing ring. The tapered hole is preferably a conical hole, the structure is simple and convenient to process, and the sealing effect of the conical hole and the cone-shaped water blocking plug on the water return hole is good; the backflow sealing ring is also sleeved in the circle of caulking groove on the annular side wall of the cone, so that the assembly is convenient, the production efficiency is improved, the water blocking plug and the backflow sealing ring can be assembled in batches as a kit, and the later-stage use and maintenance are convenient.

The taper hole extends from the small-diameter end to one side of the water outlet pipe along the axis in an equal-diameter mode to form a guide hole, and a guide column extends out of the small-diameter end of the cone of the water blocking plug to be matched with the guide hole. Through the cooperation of bullport and guide post, the guide blocks water the stopper and removes along the axis direction in return water hole, ensures that the water block when water pressure is too big blocks water the stopper and pushes away smoothly and blocks water the smooth return of stopper when water pressure reduces, avoids blocking water the deviation of moving direction and leads to pushing away and can not normally return after, and the pressure reduction pipeline keeps normally open state and influences plunger pump normal use.

The return piece is a spring, and two ends of the spring are respectively limited and abutted against the water blocking plug and the cavity wall of the return cavity. The return piece adopts a spring, the structure is simple, the manufacturing cost is low, the front end and the rear end of the spring are abutted against the water blocking plug and the cavity wall of the return cavity, the proper spring is selected to control the thrust of the spring on the water blocking plug to be matched with the limited water pressure, when the water pressure is too high to exceed the limit, high-pressure water flow pushes the water blocking plug to open a return water hole, and the spring is compressed after the water blocking plug is moved; when the water pressure is reduced to be less than the limit, the spring extends to reset to push the water blocking plug to reset to block the water return hole again.

The cavity wall of the water blocking plug and the backflow cavity is provided with a front positioning column and a rear positioning column at the position of a butt joint spring respectively, and the front end and the rear end of the spring are sleeved on the front positioning column and the rear positioning column respectively. And a front positioning column and a rear positioning column are respectively arranged on the wall of the water blocking plug and the wall of the backflow cavity so as to limit the front end and the rear end of the spring.

The utility model discloses a connect one can be along with the step-down pipeline of the automatic switching break-make of delivery port pressure variation between delivery port and water inlet, automatic step-down when plunger pump outlet one side water pressure is too big, specifically open the step-down pipeline automatically and get back to the water drainage that the delivery port was pumped into the mouth of a river and reduce delivery port one side water pressure, self-closing step-down pipeline when plunger pump outlet one side water pressure reduces to the certain degree, the motor need not shut down all the time in the normal operation among the whole water pressure accommodation process, more need not protect shutdown then restart, delivery port one side external water pipe also can not take place the booster because water pressure is too big and drop, the plunger pump uses more conveniently and safe secure.

Drawings

FIG. 1: the utility model discloses appearance structure picture.

FIG. 2: the utility model discloses the cross-sectional view.

In the figure: 1. the pump body, 2. the motor, 3. the reduction gear, 4. the water inlet, 5. the delivery port, 6. the depressurization pipeline, 7. the outlet pipe, 8. the backward flow chamber, 9. the return hole, 10. the water blocking, 11. the return piece, 12. the backward flow seal ring, 13. the tail cover, 14. the installation seal ring, 15. the pilot hole, 16. the guide post, 17. the front positioning post, 18. the back positioning post.

Detailed Description

The present invention will be further described with reference to the following embodiments.

As shown in fig. 1-2, a plunger pump with a pressure reducing pipe comprises a motor 2, a pump body 1 and a speed reducer 3 which is in transmission connection with the motor and the pump body, wherein the pump body 1 is provided with a water inlet 4 and a water outlet 5, a water conveying pipeline, a plunger cavity and a movable plunger component are arranged in the pump body 1, the water outlet 5 is connected with a water outlet pipe 7, the front end of the water outlet pipe 7 pumps water outwards, the rear end of the water outlet pipe 7 is connected with the water outlet 5 and is provided with a backflow cavity 8, the front end of the backflow cavity 8 is provided with a water return hole 9 communicated with a pipe cavity of the water outlet pipe 7, the rear end opening is connected with the pressure reducing pipe 6 and communicated with the water inlet 4, an on-off component is arranged in the backflow cavity 8 to adjust the opening and closing of the pressure reducing pipe and can open the pressure reducing pipe 6 when the water pressure of the water outlet 5 exceeds a, in the embodiment, the water return hole 9 is preferably a tapered hole, the diameter of the tapered hole is gradually reduced from one side of the water return cavity 8 to one side of the water outlet pipe 7, the tapered hole is extended from a small-diameter end to one side of the water outlet pipe 7 in an equal diameter manner along the axis of the tapered hole to form a guide hole 15, the water blocking plug 10 is a cone with a matched shape, a guide column 16 is extended from the small-diameter end of the cone to be matched with the guide hole 15, a caulking groove is arranged on the annular side wall of the cone around the circumference to install a backflow sealing ring 12, the return member 11 is a spring, the water blocking plug 10 moves towards the water return hole 9 under the action of the spring to block the water return hole 9, the backflow sealing ring 12 is arranged between the water blocking plug 10 and the; the rear end of the backflow cavity 8 is open to form a mounting hole for placing the on-off component, the mounting hole is sealed by a tail cover 13, in the embodiment, preferably, the front section of the tail cover 13 penetrates into the mounting hole to be fixedly connected through threads, the hole wall of the mounting hole is provided with internal threads, the front section of the tail cover 13 penetrating into the mounting hole is provided with external threads, a mounting sealing ring 14 is arranged between the tail cover 13 and the end surface of the mounting hole in a pressing mode, an annular concave surface is arranged on the end surface of the mounting hole to limit the mounting sealing ring 14, and the exposed part of the tail cover 13 is tightly pressed on the mounting sealing ring 14 on the annular concave surface when; the front end and the rear end of the spring are respectively in limit contact with the cavity walls of the water blocking plug 10 and the backflow cavity 8, the inner end of the tail cover 13 penetrating into the mounting hole is used as the cavity wall forming the backflow cavity 8, the front end of the spring is sleeved on a front positioning column 17 extending from the water blocking plug 10, the rear end of the spring is sleeved on a rear positioning column 18 extending from the inner end of the tail cover 13, and the axes of the two positioning columns are coincided with the axis of the spring.

The utility model discloses can be according to the automatic switching step-down pipeline of outlet pipe one side water pressure size, realize the automatic step-down when water pressure is too big, utilize the step-down pipeline to get back to the plunger pump with the water drainage that the delivery port was pumped the mouth of a river and reduce outlet pipe one side water pressure, get into the inside hydraulic pipeline pressurization of plunger pump again and pump out, form rivers circulation from this, avoid delivery port one side external pipeline to block up and cause the interior water pressure of outlet pipe to continuously rise the grow, high pressure rivers push away the water blocking stopper in this process, spring compression return water hole is opened, the high pressure rivers in the outlet pipe flow back to the water inlet of plunger pump water intaking through backward flow chamber and step-down pipeline from the return water hole, can adjust the spring in advance and make; when the water pressure on one side of the water outlet of the plunger pump is reduced to a certain degree, the pressure reducing pipeline is automatically closed, the water pressure is reduced to a pressure smaller than the thrust of the spring in the process, the spring is extended to reset and pushes the water blocking plug to reset, the water return hole is blocked again, the pressure reducing pipeline is closed, and the water on one side of the water outlet pipe does not flow back to the water inlet. In the aforesaid water pressure adjustment process, the motor of plunger pump need not shut down in the normal operating all the time, more need not protect the shutdown then restart, and the outlet pipe also can not take place the booster because water pressure is too big and drop, and the plunger pump uses more conveniently and safe secure.

Claims

1. The utility model provides a take plunger pump of step-down pipeline, includes that motor (2) and the pump body (1) and transmission connect reduction gear (3) between them, be equipped with water inlet (4) and delivery port (5) on the pump body (1), be equipped with hydraulic pipeline and plunger chamber and the plunger subassembly of activity in the pump body (1), characterized by connect between delivery port (5) and water inlet (4) and set up a step-down pipeline (6), set up the switching of break-make subassembly regulation pipeline between step-down pipeline (6) and delivery port (5), the break-make subassembly can surpass the limit at delivery port (5) water pressure and open step-down pipeline (6) or close step-down pipeline (6) when water pressure is less than the limit.

2. The plunger pump with the pressure reducing pipeline as claimed in claim 1, characterized in that the water outlet (5) is connected with a water outlet pipe (7), the front end of the water outlet pipe (7) pumps water outwards, the rear end is connected with the water outlet (5) and is provided with a return cavity (8), the front end of the return cavity (8) is provided with a return hole (9) which is communicated with the cavity of the water outlet pipe (7), the rear end opening is connected with a pressure reduction pipeline (6) which is communicated with the water inlet (4), the on-off component comprises a movable water blocking plug (10) arranged in the backflow cavity (8) and a return piece (11) for pushing the water blocking plug (10) to return automatically, the water blocking plug (10) moves towards the water return hole (9) under the action of the return piece (11) to block the water return hole (9), a backflow sealing ring (12) is arranged between the water blocking plug (10) and the inner wall of the water return hole (9), the backflow sealing ring (12) is sleeved on the outer wall of the water blocking plug (10) or embedded in the inner wall of the water return hole (9).

3. Plunger pump with pressure reducing line according to claim 2, characterized in that the back end of the return chamber (8) is open to form a mounting hole for the on-off assembly, which is sealed by a tail cap (13).

4. The plunger pump with the pressure reducing pipeline as claimed in claim 3, characterized in that the tail cover (13) is sleeved outside the mounting hole or penetrates into the mounting hole or is flatly covered on the end face of the mounting hole for fastening connection.

5. The plunger pump with the pressure reducing pipeline as claimed in claim 4, wherein the front section of the tail cover (13) penetrates into the mounting hole to be fixed in a threaded manner, the wall of the mounting hole is provided with internal threads, the front section of the tail cover (13) penetrating into the mounting hole is provided with external threads, and a mounting sealing ring (14) is arranged between the tail cover (13) and the end face of the mounting hole in a pressing manner.

6. The plunger pump with the pressure reducing pipeline according to claim 2, wherein the water return hole (9) is a variable diameter hole, and the diameter of the variable diameter hole is gradually reduced from the side of the return cavity (8) to the side of the water outlet pipe (7).

7. Plunger pump with pressure reducing pipe according to claim 6, characterized in that the reducing hole is a conical hole, the water stop (10) is a matching cone, the return seal (12) is nested on the annular side wall of the cone, the annular side wall is provided with a caulking groove around the circumference for installing the return seal (12).

8. The plunger pump with pressure reducing pipeline according to claim 7, characterized in that the tapered hole is extended along its axis from the small diameter end to the side of the outlet pipe (7) with a constant diameter to form a guide hole (15), and the cone of the water blocking plug (10) is extended at the small diameter end to form a guide post (16) matched with the guide hole (15).

9. Plunger pump with depressurisation conduit according to one of claims 2 to 8, characterised in that the return element (11) is a spring, the front and rear ends of which limit the walls of the counter-block (10) and return chamber (8) respectively.

10. The plunger pump with the pressure reducing pipeline according to claim 9, wherein the water blocking plug (10) and the cavity wall of the return cavity (8) are respectively provided with a front positioning column (17) and a rear positioning column (18) at the abutting spring, and the front end and the rear end of the spring are respectively sleeved on the front positioning column (17) and the rear positioning column (18).