CN213684542U

CN213684542U - Self-detection type explosion-proof pump with double filter screens

Info

Publication number: CN213684542U
Application number: CN202022288060.1U
Authority: CN
Inventors: 张向泽
Original assignee: Hangzhou Texby Pump Co ltd
Current assignee: Hangzhou Texby Pump Co ltd
Priority date: 2020-10-14
Filing date: 2020-10-14
Publication date: 2021-07-13
Anticipated expiration: 2030-10-14

Abstract

The utility model discloses a self-detecting explosion-proof pump with double filter screens, which belongs to the technical field of explosion-proof pumps and comprises a base, a motor arranged on the base and a pump body arranged on the base, wherein the pump body is provided with a liquid inlet pipe and a liquid outlet pipe, the liquid outlet pipe is connected with a liquid inlet component, the liquid inlet component comprises a first connecting section, a second connecting section and at least two filter sections arranged between the first connecting section and the second connecting section, the filter sections are detachably connected with a filter component, the filter component comprises a first filter frame body, a second filter frame body arranged in the first filter frame body and a filter screen arranged in the second filter frame body, the second filter frame body and the filter sections are fixedly connected through a locking structure, the second filter frame body can move back and forth relative to the first filter frame body, the first filter frame body is provided with an elastic piece for limiting the second filter frame body to move along the medium flowing direction, and a pressure detection assembly is arranged on the filtering section.

Description

Self-detection type explosion-proof pump with double filter screens

Technical Field

The utility model relates to an explosion-proof pump technical field, concretely relates to self-checking formula explosion-proof pump with two filter screens.

Background

Explosion-proof pumps are generally used for conveying flammable and explosive media or in explosive hazard places, and parts such as pump bodies and the like are required to be made of explosion-proof materials, such as aluminum alloy, stainless steel and the like. The centrifugal pump is one kind of explosion-proof pump, and utilizes the centrifugal motion of water to pump water. In the use process of the explosion-proof pump, impurities are often mixed in water and enter the interior of the centrifugal pump, so that the problem of internal blockage or difficulty in cleaning is caused, and the quality of the water solution is influenced by substances washed and fallen off from the surface of the inner cavity of the centrifugal pump, particularly the explosion-proof pump is used in complex environments such as mines, fields and the like.

Because explosion-proof pump in the use, can constantly accumulate the impurity that is filtered on the filter screen, consequently, need shut down, dismantle the filter screen and clear up in order to clear up the impurity on the filter screen, not only waste time and energy, still cause the influence to the engineering progress.

In order to solve the technical problem, a double-filter-screen type explosion-proof pump is developed, but the conventional double-filter-screen type explosion-proof pump needs to manually observe the water yield to judge whether the filter screen is invalid or not, so that great inconvenience is caused in actual use.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

Need the technical problem of artifical observation water yield in order to judge whether the filter screen became invalid among the prior art, the utility model provides a self-checking formula explosion-proof pump with two filter screens, it can whether become invalid by the automated inspection filter screen, guarantees that explosion-proof pump is in large-traffic water state constantly.

2. Technical scheme

In order to solve the above problem, the utility model provides a technical scheme does:

the utility model provides a self-checking formula explosion-proof pump with two filter screens, includes the base, locates the motor on the base, locates the pump body on the base, be equipped with feed liquor pipe and fluid-discharge tube on the pump body, be connected with the feed liquor subassembly on the fluid-discharge tube, the feed liquor subassembly includes first linkage segment, second linkage segment and locates two at least filter segments between first linkage segment and the second linkage segment, and first linkage segment is used for connecting the pipeline that lets in the medium, the both ends of filter segment are equipped with the automatically controlled valve that can block self and first linkage segment and second linkage segment intercommunication, can dismantle in the filter segment and be connected with filtering component, the filter segment outside is equipped with the fluting that supplies filtering component embedding, the second linkage segment rotates with the feed liquor pipe to be connected, be equipped with on the base and be used for driving the relative feed liquor pipe pivoted drive structure of feed liquor subassembly, filtering component includes first filter frame body, Locate the second in the first filter frame and filter the framework and locate the filter screen in the second filter frame, the second filters framework and filter segment and links firmly through the locking structure, the second filters the framework and makes a round trip to move relative to the first filter frame, be equipped with the elastic component that is used for restricting the second and filters the framework and move along the medium flow direction on the first filter frame, be equipped with the pressure measurement subassembly on the filter segment, automatically controlled valve, drive structure and pressure measurement subassembly all are connected with the controller electricity. The utility model discloses in, whether the cooperation of accessible second filter frame body and pressure measurement subassembly became invalid in order to detect the filter screen, compare traditional through artifical observation fluid-discharge tube department medium flow size in order to judge whether the filter screen became invalid, the testing result is more accurate, but many equipment of same operating personnel simultaneous management reduce the human cost of enterprise.

Optionally, a plurality of sliding blocks are arranged on the outer side of the second filtering frame body, a sliding block groove matched with the sliding blocks is arranged on the first filtering frame body, the sliding block groove is opened towards one side of the medium flowing direction, and the pressure detection assembly is arranged on the side wall of the opening groove connected with the sliding block groove.

Optionally, the pressure detection assembly includes a groove formed in the side wall of the slot and a pressure sensor disposed in the groove, and the slider is provided with a pressure rod capable of being inserted into the groove.

Optionally, a limiting rod consistent with the moving direction of the sliding block is arranged in the sliding block groove, and a limiting groove matched with the limiting rod is arranged on the sliding block.

Optionally, a first elastic groove is formed in the first filtering frame body, a second elastic groove is formed in the sliding block corresponding to the first elastic groove, one end of the elastic piece is arranged in the first elastic groove, and the other end of the elastic piece is arranged in the second elastic groove.

Optionally, the open end of the groove is a flared structure.

Optionally, the filter screen is a cone-shaped structure protruding towards the medium flowing direction.

Optionally, the two sides of the top of the second filtering frame body are respectively provided with a hanging part, a hanging groove is formed between the hanging part and the second filtering frame body, and the locking structure comprises a first locking hole arranged on the hanging part, a second locking hole arranged on the filtering section, a third locking hole arranged on the second filtering frame body, and a locking piece which sequentially penetrates through the first locking hole, the second locking hole and the third locking hole to fix the second filtering frame body and the filtering section.

Optionally, the driving structure comprises a driving motor arranged on the base and a driving gear arranged at the end part of an output shaft of the driving motor, and the driving gear and the second connecting section are connected through a synchronous belt.

Optionally, the pressure detection assembly further comprises an audible and visual alarm, and the audible and visual alarm is electrically connected with the controller.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

(1) when the impurities filtered by the filter screen in the filter section are gradually increased, the impurities gradually block the filter holes on the filter screen to reduce the medium flow of the filter screen, the resistance of the filter screen to a medium is increased, because the second filter frame body can move back and forth relative to the first filter frame body, the second filter frame body can overcome the elastic force of the elastic piece under the action of the medium resistance and move along the medium flow direction, when the second filter frame body moves backwards to be contacted with the pressure detection assembly, the pressure detection assembly detects a pressure signal, the electric control valve on the filter section is controlled by the controller to close the medium channel and synchronously open the medium channel of the other filter section, and meanwhile, the electric control valve controller controls the driving structure to drive the filter section which reaches the filter limit to rotate to the lower position;

(2) the driving structure always controls the filter section which reaches the filtering limit to rotate to the lower position, the slot is arranged on the outer side of the filter section, when the filter section rotates to the lower position, the slot is opened towards the lower part, when the filter assembly is taken out from the slot, impurities in the filter section can flow out downwards from the slot under the action of gravity, so that media in the filter section and the filtered impurities are completely discharged out of the filter section, manual cleaning of the impurities in the filter section is not needed, and the problem of residual impurities is fundamentally solved;

(3) when one filtering section rotates to the lower position to discharge impurities, the filtering section in a communicated state is located at the position right above the filtering section, and the opening groove of the filtering section is opened towards the right upper side;

(4) when maintenance and cleaning are needed, impurities on the filtering component can be cleaned without shutdown, and the project progress is guaranteed;

drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a middle filter segment according to the present invention;

FIG. 3 is a cross-sectional view of the filter segment according to the present invention;

FIG. 4 is a schematic sectional view of the middle filter segment according to the present invention;

FIG. 5 is an enlarged schematic view at A in FIG. 4;

1. a base; 2. a motor; 3. a pump body; 31. a liquid inlet pipe; 32. a liquid discharge pipe; 4. a liquid inlet component; 41. a first connection section; 42. a second connection section; 43. a filtration section; 431. an electrically controlled valve; 432. grooving; 433. a chute; 5. a filter assembly; 51. a second filter frame; 511. a hanging part; 512. a suspension groove; 513. a grip bar; 5131. a finger groove; 52. a filter screen; 6. a drive structure; 61. a drive motor; 62. a drive gear; 63. a synchronous belt; 7. a first locking hole; 8. a second locking hole; 9. a third locking hole; 10. a baffle plate; 11. a support bar; 50. a first filter frame body; 501. an elastic member; 502. a slider slot; 5021. a limiting rod; 503. a first elastic groove; 121. a groove; 122. a pressure sensor; 123. an audible and visual alarm; 514. A slider; 5141. a pressure lever; 5142. a limiting groove; 5143. a second resilient slot.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings 1-5 and the accompanying examples.

Example 1

With reference to fig. 1-5, the self-detecting explosion-proof pump with double filter screens of this embodiment includes base 1, motor 2 on base 1, the pump body 3 on base 1, be equipped with feed liquor pipe 31 and fluid-discharge tube 32 on the pump body 3, its characterized in that: the liquid discharge pipe 32 is connected with a liquid inlet assembly 4, the liquid inlet assembly 4 comprises a first connecting section 41, a second connecting section 42 and at least two filtering sections 43 arranged between the first connecting section 41 and the second connecting section 42, the first connecting section 41 is used for connecting a pipeline for introducing media, in the embodiment, the filtering sections 43 are arranged in an up-and-down symmetrical mode respectively, two ends of each filtering section 43 are provided with an electric control valve 431 capable of blocking the communication between the filtering section 43 and the first connecting section 41 and the second connecting section 42, each electric control valve 431 is one of a gate valve, a stop valve or an electromagnetic valve, the filtering sections 43 are detachably connected with the filtering assemblies 5, the outer sides of the filtering sections 43 are provided with grooves 432 for the filtering assemblies 5 to be embedded in, the second connecting section 42 is rotatably connected with the liquid inlet pipe 31, the base 1 is provided with a driving structure 6 for driving the liquid inlet assembly 4 to rotate relative to the liquid inlet pipe 31, the filter assembly 5 comprises a first filter frame body 50, a second filter frame body 51 arranged in the first filter frame body 50 and a filter screen 52 arranged in the second filter frame body 51, the second filter frame body 51 and the filter section 43 are fixedly connected through a locking structure, the second filter frame body 51 can move back and forth relative to the first filter frame body 50, an elastic piece 501 used for limiting the second filter frame body 5 to move along the medium flowing direction is arranged on the first filter frame body 50, a pressure detection assembly is arranged on the filter section 43, and the electric control valve 431, the driving structure 6 and the pressure detection assembly are all electrically connected with the controller

In the actual use process, the filtering component 5 can block and filter impurities in the medium flowing through the filtering section 43, so that the impurities are prevented from entering the pump body 3 to cause damage; when liquid is fed, only one filter section 43 is in a communicating state under the control of the electric control valve 431, the first connecting section 41 and the second connecting section 42 realize the conveying of media through the filter section 43 at the moment, the rest filter sections 43 are in a closing state under the action of the corresponding electric control valve 431, when the filter section 43 in the communicating state originally influences the conveying of the media due to more filtered impurities, the electric control valve 431 closes the filter section 43, meanwhile, the other filter section 43 is opened to continuously realize the purpose of conveying the media, and when maintenance and cleaning are needed, the impurities on the filter assembly 5 can be cleaned without stopping the machine, so that the engineering progress is ensured; because the operator can not clean the impurities remained in the filter segment 43 when taking out the filter assembly 5 from the filter segment 43, in this embodiment, the driving structure 6 always controls the filter segment 43 which has reached the filtering limit to rotate to the lower position, because the slot 432 is arranged outside the filter segment 43, when the filter segment 43 rotates to the lower position, the slot 432 is opened towards the right lower side, when taking out the filter assembly 5 from the slot 432, the impurities in the filter segment 43 can flow out downwards from the slot 432 under the action of gravity, so that the media in the filter segment 43 and the filtered impurities are completely discharged out of the filter segment 43, the impurities in the filter segment 43 do not need to be manually cleaned, and the problem of the impurities remaining is fundamentally solved; when the impurities filtered by the filter screen in the filter section are gradually increased, the impurities gradually block the filter holes on the filter screen to reduce the medium flow of the filter screen, the resistance of the filter screen to a medium is increased, because the second filter frame body can move back and forth relative to the first filter frame body, the second filter frame body can overcome the elastic force of the elastic piece under the action of the medium resistance and move along the medium flow direction, when the second filter frame body moves backwards to be contacted with the pressure detection assembly, the pressure detection assembly detects a pressure signal, the electric control valve on the filter section is controlled by the controller to close the medium channel and synchronously open the medium channel of the other filter section, and meanwhile, the electric control valve controller controls the driving structure to drive the filter section which reaches the filter limit to rotate to the lower position; the utility model discloses in, whether the cooperation of accessible second filter frame body and pressure measurement subassembly became invalid in order to detect the filter screen, compare traditional through artifical observation fluid-discharge tube department medium flow size in order to judge whether the filter screen became invalid, the testing result is more accurate, but many equipment of same operating personnel simultaneous management reduce the human cost of enterprise.

In this embodiment, since the filter segments 43 are symmetrically arranged, when one filter segment 43 rotates to the lower position to discharge impurities, the filter segment 43 in the communication state is located at the right upper position at this time, and the slots 432 of the filter segment 43 open towards the right upper side, by adopting the above design, the sealing requirement between the filter assembly 5 and the slots 432 can be effectively reduced, and the possibility of leakage of the medium from the slots 432 due to gravity can be eliminated.

Example 2

With reference to fig. 1-5, compared with embodiment 1, the self-detecting explosion-proof pump with two filter screens of this embodiment includes a plurality of sliders 514 disposed on the outer side of the second filter frame 51, and the first filter frame 50 is provided with slider grooves 502 engaged with the sliders 514, in this embodiment, the four sides of the second filter frame 51 are provided with a slider 514, the slider grooves 502 are grooves formed by inward recessing of the inner edge of the first filter frame 50, the slider grooves 502 are open towards one side of the media flowing direction, in this embodiment, the media flowing direction in the filter segment 43 is from left to right, the right side of the slider grooves 502 is open, and the pressure detecting component is disposed on the right side wall of the slot 432.

The slider 514 can slide back and forth in the slider groove 502 to play a certain guiding role in the sliding direction of the second filter frame body 51, so that the situation that impurities are accumulated on one side of the filter screen 52 to cause the stress and inclination of one side of the second filter frame body 51 is avoided, the situation that the filter screen 52 and the second filter frame body 51 can be pushed to act simultaneously by enough impurities on the filter screen 52 is ensured, and the situation that only part of impurities on the filter screen 52 are judged to be invalid by the pressure detection assembly is avoided.

Example 3

With reference to fig. 1-5, compared with

embodiment

1 or 2, the self-detecting explosion-proof pump with dual filter screens of this embodiment includes a groove 121 disposed on a side wall of the slot 432 and a pressure sensor 122 disposed in the groove 121, the slider 514 is provided with a pressure rod 5141 capable of being inserted into the groove 121, the groove 121 and the pressure rod 5141 are disposed in the same direction and at the same height, and when the pressure rod 5141 moves toward the groove 121, the pressure rod 5141 can be inserted into the groove 121.

The pressure rod 5141 touches the pressure sensor 122, when the pressure sensor 122 detects a pressure signal from the pressure rod 5141, it is determined that the filter screen 52 is disabled, and compared with the case that the slider 514 is directly contacted with the pressure sensor 122, the pressure rod 5141 can concentrate the acting force on one point to be applied to the pressure sensor 122, so that the pressure detection assembly is more sensitive, rather than adjusting the sensitivity of the pressure sensor 122; when the pressure sensor 122 is installed in the groove 121, the pressure sensor 122 does not protrude from the side wall of the slot 432, and when the filter assembly 5 is replaced, the filter assembly 5 does not directly contact with the pressure sensor 122 when entering or exiting from the slot 432, thereby preventing the pressure sensor 122 from being damaged.

Example 4

With reference to fig. 1-5, in the self-detecting explosion-proof pump with dual filter screens according to this embodiment, compared with any one of embodiments 1-5, a limit rod 5021 consistent with the moving direction of the slider 514 is disposed in the slider groove 502, a limit groove 5142 matched with the limit rod 5021 is disposed on the slider 514, and the limit groove 5142 is disposed on the slider 514 in a penetrating manner.

With the above design, the slider 514 can slide back and forth along the length direction of the limit rod 5021 through the limit groove 5142, on the basis of the cooperation between the slider 514 and the slider groove 502, the direction of the slider 514 during the action of the slider groove 502 is limited doubly by the cooperation between the

limit grooves

5142 and 5021, and the possibility that the slider 514 tilts and deflects in the slider groove 502 is substantially zero, so that the second filter frame body 51 is integrally translated during the action, which is beneficial in that the subsequent pressure rod 5141 can be stably inserted into the groove 121 to trigger the pressure sensor 122.

Example 5

With reference to fig. 1 to 5, in the self-detecting explosion-proof pump with dual filter screens according to this embodiment, compared with any one of embodiments 1 to 4, a first elastic groove 503 is disposed on the first filter frame 50, a second elastic groove 5143 is disposed on the slider 514 corresponding to the first elastic groove 503, one end of the elastic element 501 is disposed in the first elastic groove 503, and the other end of the elastic element 501 is disposed in the second elastic groove 5143.

In this embodiment, the elastic member 501 is a spring.

The two ends of the elastic member 501 are limited respectively by the first elastic groove 503 and the second elastic groove 5143, and in the process that the slider 514 slides rightwards, the middle part of the elastic member 501 is stretched to generate reverse elastic force, and the two ends of the elastic member 501 are fixed, so that the elastic action direction generated by the elastic member 501 is consistent with the movement direction of the slider 514, and the deviation movement of the slider 514 caused by extra directional acting force can not be generated.

Example 6

With reference to fig. 1 to 5, in the self-detecting explosion-proof pump with double filter screens according to this embodiment, compared with any one of embodiments 1 to 5, the open end of the groove 121 is a flared structure, and the open end of the groove 121 is a side communicated with the slot 432.

Because the filter assembly 5 is difficult to avoid having a small deviation when installing in the filter segment 43, the open end of recess 121 adopts the design of flaring structure, and the accurate inserting of pressure bar 5141 tip to recess 121 of being convenient for even have certain deviation between the opening part of pressure bar 5141 and recess 121, the flaring structure can also overcome this deviation and play certain guide positioning effect to pressure bar 5141.

Example 7

With reference to fig. 1-5, compared with any one of embodiments 1-6, the self-testing explosion-proof pump with double filter screens of this embodiment has a conical structure with the filter screen 52 protruding toward the medium flowing direction.

The setting of the filter screen 52 of cone type structure, its benefit lies in, firstly, the filter area of filter screen 52 compares the filter screen greatly increased of plane formula, help improving the filtration limit of filter screen 52, can filter more impurity, secondly, impurity is blockked by filter screen 52, impurity is collected in the cone type portion of filter screen 52, the indirect effort that produces filter screen 52 behind the effort that impurity received the medium just in time is applyed in the middle part axle center position department of filter screen 52, further avoid impurity to pile up and lead to second filter frame body 51 one side atress and slope in one side of filter screen 52.

Example 8

With reference to fig. 1-5, in the self-checking explosion-proof pump with dual filter screens of this embodiment, compared with any one of embodiments 1-7, two sides of the top of the second filter frame 51 are respectively provided with a suspension portion 511, a suspension groove 512 is provided between the suspension portion 511 and the second filter frame 51, the groove diameter of the suspension groove 512 is equal to the wall thickness of the sliding groove 433 of the filter segment 43, when the second filter frame 51 is inserted into the sliding groove 433, the suspension portion 511 is just suspended on the wall of the filter segment 43 through the suspension groove 512, compared with the conventional insertion structure, the arrangement of the suspension portion 511 further improves the stability of the second filter frame 51 after installation, and the locking structure includes a first locking hole 7 arranged on the suspension portion 511, a second locking hole 8 arranged on the filter segment 43, a third locking hole 6 arranged on the second filter frame 51, and a locking hole 7 sequentially passing through the first locking hole 7, The second locking hole 8 and the third locking hole 9 are locking members for fixing the second filter frame body 51 and the filter section 43, the locking members are bolts, and at least one of the first locking hole 7, the second locking hole 8 and the third locking hole 9 is a screw hole matched with the bolts.

By adopting the structure, when the locking piece passes through the first locking hole 7, the second locking hole 8 and the third locking hole 9, the locking piece, the hanging part 511, the second filter frame body 51 and the filter section 43 are connected, the filter section 43 limits the vertical motion of the locking piece, the locking piece indirectly limits the vertical motion of the hanging part 511 and the second filter frame body 51, the hanging part 511 and the second filter frame body 51 are of an integral structure, the motion of the hanging part 511 is limited while the motion of the second filter frame body 51 is limited, and the second filter frame body 51 can be stably installed in the filter section 43 under multiple limits.

Example 9

With reference to fig. 1-5, in the self-detecting explosion-proof pump with dual filter screens of this embodiment, compared with any one of embodiments 1-8, the driving structure 6 includes a driving motor 61 disposed on the base 1 and a driving gear 62 disposed at an output shaft end of the driving motor 61, and the driving gear 62 is in transmission connection with the second connecting section 42 through a synchronous belt 63; the driving gear 62 and the second connecting section 42 are in the same horizontal position, the synchronous belt 63 is vertically wound between the driving gear 62 and the second connecting section 42, and the surface of the second connecting section 42 is provided with a tooth part which is in transmission fit with the synchronous belt 63 along the circumferential direction.

When the driving motor 61 is started to control the driving gear 62 to rotate, the driving gear 62 drives the timing belt 63 to rotate, and the timing belt 63 drives the second connecting section 42 to rotate.

Example 10

With reference to fig. 1 to 5, compared with any one of embodiments 1 to 9, the self-detecting explosion-proof pump with double filter screens of the present embodiment further includes an audible and visual alarm 123, and the audible and visual alarm 123 is electrically connected to the controller.

When the pressure detecting component detects the pressure signal value, it transmits the signal value controller to activate the audible and visual alarm 123, and the audible and visual alarm 123 generates an audible and visual alarm to remind the operator to replace the filter screen 52 reaching the filtering limit.

Example 11

With reference to fig. 1-5, compared with any one of embodiments 1-10, the self-detecting explosion-proof pump with double filter screens of this embodiment has a chute 433, which is communicated with the slot 432, on the inner wall of the filter section 43.

The filter assembly 5 is inserted from the slot 432 and moves down to the designed position along the slide groove 433, and the cut-off passage of the filter section 43 is blocked to filter the medium, and the disassembly and maintenance are convenient.

A baffle 10 is arranged below the liquid inlet component 4, and the baffle 10 is connected to the base 1 through a plurality of support rods 11; the baffle 10 is provided with a cavity, and a sewage discharge pipe communicated with the cavity is connected below the baffle.

The baffle 10 can block the medium and impurities discharged from the filtering section 43, and the medium and the impurities are collected in the chamber and discharged through the sewage discharge pipe for centralized treatment, thereby effectively avoiding the whole equipment from being polluted.

The filter segment 43 and the first connecting segment 41 as well as the filter segment 43 and the second connecting segment 42 are connected by flanges, so that the filter segment is detachable and convenient to maintain.

A holding strip 513 is arranged at the top of the second filtering frame body 51; both sides of the holding strip 513 are provided with finger grooves 5131, and the finger grooves 5131 are circular arc grooves.

The arrangement of the holding strip 513 facilitates the operator to take the second filter frame body 51, and the finger groove 5131 improves the grabbing effect of the holding strip 513 by the operator, so that the holding strip 513 is prevented from slipping off from the hand of the operator.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. The utility model provides a self-checking formula explosion-proof pump with two filter screens which characterized in that: the liquid inlet component comprises a first connecting section, a second connecting section and at least two filtering sections arranged between the first connecting section and the second connecting section, the first connecting section is used for connecting a pipeline leading in a medium, electric control valves capable of blocking the communication between the filtering sections and the first connecting section and the communication between the filtering sections and the second connecting section are arranged at the two ends of the filtering sections, the filtering sections are detachably connected with filtering components, slots for embedding the filtering components are arranged on the outer sides of the filtering sections, the second connecting section is rotatably connected with the liquid inlet pipe, a driving structure for driving the liquid inlet component to rotate relative to the liquid inlet pipe is arranged on the base, and the filtering components comprise a first filtering frame body, a second filtering frame body arranged in the first filtering frame body and a filtering net arranged in the second filtering frame body, the second filters framework and filter segment and links firmly through the locking structure, the second filters the framework and makes a round trip to move relatively first filtration framework, be equipped with the elastic component that is used for restricting the second and filters the framework and move along the medium flow direction on the first filtration framework, be equipped with the pressure measurement subassembly on the filter segment, automatically controlled valve, drive structure and pressure measurement subassembly all are connected with the controller electricity.

2. The self-testing type anti-explosion pump with the double filter screens as claimed in claim 1, wherein: the outer side of the second filtering frame body is provided with a plurality of sliding blocks, the first filtering frame body is provided with sliding block grooves matched with the sliding blocks, the sliding block grooves are opened towards one side of the medium flowing direction, and the pressure detection assembly is arranged on the side wall of the opening groove connected with the sliding block grooves.

3. The self-testing type anti-explosion pump with the double filter screens as claimed in claim 2, wherein: the pressure detection assembly comprises a groove arranged on the side wall of the groove and a pressure sensor arranged in the groove, and a pressure rod capable of being inserted into the groove is arranged on the sliding block.

4. The self-testing type anti-explosion pump with the double filter screens as claimed in claim 2, wherein: the slider is characterized in that a limiting rod consistent with the motion direction of the slider is arranged in the slider groove, and a limiting groove matched with the limiting rod is arranged on the slider.

5. The self-testing type anti-explosion pump with the double filter screens as claimed in claim 2, wherein: the first filtering frame body is provided with a first elastic groove, the sliding block is provided with a second elastic groove corresponding to the first elastic groove, one end of the elastic piece is arranged in the first elastic groove, and the other end of the elastic piece is arranged in the second elastic groove.

6. The self-testing type anti-explosion pump with the double filter screens as claimed in claim 3, wherein: the opening end of the groove is of a flaring structure.

7. The self-testing type anti-explosion pump with the double filter screens as claimed in claim 3, wherein: the filter screen is a cone-shaped structure protruding towards the medium flowing direction.

8. The self-testing type anti-explosion pump with the double filter screens as claimed in claim 1, wherein: the second filters framework top both sides and is equipped with the portion of hanging respectively, hang and have the groove of hanging between the portion of hanging and the second filtration framework, the locking structure is including locating first locking hole in the portion of hanging, locating second locking hole on the filter segment, locating the third locking hole on the second filtration framework and pass first locking hole, second locking hole, third locking hole in proper order and filter the locking piece of framework and filter segment with fixed second filtration.

9. The self-testing type anti-explosion pump with the double filter screens as claimed in claim 1, wherein: the drive structure is including locating the driving motor on the base and locating the drive gear of driving motor output shaft tip, drive gear and second linkage segment pass through synchronous belt drive and connect.

10. The self-testing type anti-explosion pump with the double filter screens as claimed in claim 1, wherein: the pressure detection assembly further comprises an audible and visual alarm, and the audible and visual alarm is electrically connected with the controller.