A cement ash filter

Abstract

The present invention discloses a cement ash filter for cementing, the filter comprising a filter body, a support frame, a gland assembly and a filter screen, the filter body is arranged vertically by the support frame, and has an inner cavity with a top opening, the top opening of the inner cavity is sealed by the gland assembly, the lower wall surface is provided with an ash inlet connected to the inner cavity, the upper wall surface is provided with an ash outlet connected to the inner cavity, and a multi-layer, conical or truncated cone filter screen is provided in the inner cavity between the ash inlet and the ash outlet, the cement ash enters the filter body through the ash inlet, flows through the filter screen for filtration, and is discharged from the ash outlet. The present invention not only adopts a vertical filtration method to avoid the problem of filter blockage during cement ash filtration, but also ensures that the cement ash is quickly filtered clean.

Description

Technical Field

[0001] The invention relates to cementing construction equipment, in particular to a cementing cement ash filter. Background Art

[0002] The cement slurry used in cementing construction must be clean and free of impurities. The cement ash used to prepare the cement slurry is often cleaned by the filter in the cementing construction equipment. The filter used is also one of the core links in the process of preparing the cement slurry.

[0003] The traditional filter, especially the shortcomings of its own structure, has the following problems:

[0004] 1. It is easy to cause the filter screen and other components to be blocked during filtration, causing the cementing construction process to be delayed;

[0005] Second, the cement dust filtered by the traditional filter is not filtered cleanly, which not only damages the cement truck parts but also causes poor water loading on the cement truck, affecting the construction;

[0006] 3. After the traditional filter is finished filtering, the cement dust on the entire filter and other parts is not easy to clean. The cement dust with residual chemicals will also cause the filter and other parts to be corroded after a long period of accumulation. Summary of the invention

[0007] The purpose of the present invention is to provide a cementing cement ash filter which not only adopts a vertical filtering method to avoid the problem of filter clogging during cement ash filtering, but also ensures that the cement ash is quickly filtered and cleaned.

[0008] The technical solution adopted by the present invention is a cementing cement ash filter, the filter comprising a filter body, a support frame, a pressure cover assembly and a filter screen, the filter body is vertically arranged by the support frame, and has an inner cavity with a top opening, the top opening of the inner cavity is sealed by the pressure cover assembly, the lower wall surface is provided with an ash inlet connected to the inner cavity, the upper wall surface is provided with an ash outlet connected to the inner cavity, and a multi-layer, conical or truncated cone-shaped filter screen is provided in the inner cavity between the ash inlet and the ash outlet. The cement ash enters the filter body through the ash inlet, flows through the filter screen for filtration, and is discharged from the ash outlet.

[0009] The filter screen consists of three layers, namely a first layer of filter screen, a second layer of filter screen and a third layer of filter screen, and the three layers of filter screens are stacked on each other from top to bottom, the second layer of filter screen has a plurality of support ears 1 circumferentially and evenly arranged at the waist position, the third layer of filter screen has a plurality of support ears 2 circumferentially and evenly arranged at the waist position, and the inner wall surface of the inner cavity of the filter body has a plurality of support ears 3 circumferentially and evenly arranged, the first layer of filter screen is seated on support ear 1 at the waist of the second layer of filter screen, the second layer of filter screen is seated on support ear 2 at the waist of the third layer of filter screen, and the third layer of filter screen is seated on support ear 3 in the inner cavity of the filter body, so that an annular gap is formed between two adjacent filter screens.

[0010] The gland assembly is mainly composed of a gland, a buckle lock, a threaded rod, a gland handle, a support rod and a hanging rod. The gland covers the opening at the top of the filter body. A plurality of buckle locks for fixing the gland are arranged between the gland and the filter body. A blind hole perpendicular to the top end face of the gland is provided at the center of the top end face of the gland. An internal thread is provided in the blind hole on the top end face of the gland. One end of the threaded rod matches and is screwed into the blind hole on the top end face of the gland, and the other end is fixedly connected to the gland handle. An internal threaded hole matching the external thread of the threaded rod is provided at the middle position of the support rod, which is sleeved onto the threaded rod, and a hanging rod groove is provided at each end. There are two hanging rods, which are arranged symmetrically, one end of each hanging rod is hingedly connected to the upper wall of the filter body, and the other end is arranged to be a hook matching the hanging rod groove, so that the hook can be hung in the corresponding hook groove, and the pressing cover handle is rotated to make the threaded rod rotate out in the direction away from the pressing cover, so that the hanging rod groove of the support rod and the hook of the hanging rod can be loosened, so that the pressing cover is opened from the opening position at the top of the filter body to release the covering state, and the pressing cover handle is rotated to make the threaded rod rotate in the direction close to the pressing cover, so that the hanging rod groove of the support rod and the hook of the hanging rod can be tightened, so that the pressing cover is tightly covered at the opening position at the top of the filter body to complete the covering action.

[0011] The filter also includes a reverse blowing head, which is mainly composed of a core body and a transition tube. The core body is a cylinder, in which a blowing cavity is opened, and a plurality of reverse blowing holes connected to the blowing cavity are evenly opened circumferentially on the outer peripheral wall of the upper section, an annular protrusion is arranged on the outer peripheral wall of the lower section, and a sampling hole connected to the blowing cavity is opened on the bottom end surface, the orifice of the sampling hole is connected to the sampling tube, and a ball valve with an on-off function is arranged on the sampling tube, and the upper end portion of the transition tube is arranged at the bottom of the filter body in a detachable structure, the upper end channel opening extends upward and is connected to the inner cavity of the filter body, and the lower end portion is sleeved with the core body, the annular protrusion on the outer peripheral wall of the core matches the annular groove on the inner peripheral wall of the transition tube, and is fixed and sealed, and the lower end channel opening of the transition tube is connected to the reverse blowing hole of the core body.

[0012] The root of the support frame is provided with wheels.

[0013] A push handle is arranged on the outer peripheral wall surface of the filter body.

[0014] The beneficial effects of the present invention are:

[0015] 1. The present invention not only adopts a vertical filtering method to avoid the problem of filter clogging during cement ash filtering, but also ensures that the cement ash is filtered cleanly and quickly.

[0016] 2. In the present invention, a reverse blowing head is designed at the bottom of the filter body. On the one hand, the cement ash sample is taken out through the sampling tube to realize the sampling of the filtered cement ash in the filter body. On the other hand, a high-pressure air source can be externally connected to the sampling tube to solve the problem of difficult cleaning of cement ash in the entire filter and other components connected to the filter, so as to avoid the accumulation of cement ash with residual agents after long-term cleaning, which will cause erosion to the filter and other components connected to the filter.

[0017] 3. In the present invention, wheels are arranged at the base of the support frame, and a push handle is arranged on the outer peripheral wall surface of the filter body to increase the mobility of the filter, thereby solving the problem that the filter is too heavy and cannot be moved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] Figure 1 It is a schematic diagram of the present invention.

[0020] Meaning of the codes in the figure: 1—filter body; 101—ash inlet; 102—ash outlet; 103—quick-release connector; 2—support frame; 201—wheel; 3—pressure cover assembly; 301—pressure cover; 302—buckle lock; 303—threaded rod; 304—pressure cover handle; 305—support rod; 306—hanging rod slot; 307—hanging rod; 308—hook; 309—nut; 4—filter screen; 401—first layer of filter screen; 402—second layer of filter screen; 403—third layer of filter screen; 5—reverse blowing head; 501—core body; 502—transition pipe; 503—reverse blowing hole; 504—sampling hole; 505—sampling tube; 506—ball valve; 6—push handle. DETAILED DESCRIPTION

[0021] See also Figure 1 As shown: The present invention is a cement ash filter, which includes a filter body 1, a support frame 2, a gland assembly 3 and a filter screen 4.

[0022] The filter body 1 is arranged vertically by a support frame 2 (the support frame 2 is welded to the bottom of the filter body 1), and has an inner cavity with an opening at the top. The inner cavity is a cylindrical space, and the top opening of the inner cavity is sealed by a gland assembly 3. The lower wall is provided with an ash inlet 101 connected to the inner cavity, and the upper wall is provided with an ash outlet 102 connected to the inner cavity. A conical or truncated cone filter screen 4 is provided in the inner cavity between the ash inlet 101 and the ash outlet 102. In order to conveniently and quickly connect other equipment to the ash inlet 101 and the ash outlet 102 of the filter body 1, a quick connector 103 (the quick connector 103 is an existing mature pipe connector) can be provided on the ash inlet 101 and the ash outlet 102 of the filter body 1, respectively. The present invention not only adopts a vertical filtering method to avoid the problem of filter clogging (the clogging filter mentioned here refers to the filter screen 4 that clogs the filter) during cement ash filtration, but also avoids clogging because the filter screen 4 is arranged vertically, and the filter screen 4 is conical or truncated cone-shaped. Under the action of gravity, there will be no problem of cement ash accumulation and retention on the filter screen 4. Moreover, the filter screen 4 is multi-layer (three-layer), conical or truncated cone-shaped, and the increased filtering layers and filtering area naturally ensure that the cement ash is quickly filtered clean. It is worth noting that the filter screens 4 here are not simply stacked together, but annular gaps are formed between each other, which avoids the negative effect of cement ash being retained on the filter screen 4 while increasing the filtering effect.

[0023] The cement dust enters the filter body 1 through the dust inlet 101 , flows through the filter screen 4 for filtration, and is discharged from the dust outlet 102 .

[0024] The above-mentioned filter screen 4 is composed of three layers, namely, the first filter screen 401, the second filter screen 402 and the third filter screen 403, which are stacked from top to bottom. The waist position of the second filter screen 402 (the waist position refers to the position of half the height, the same below) is surrounded by multiple support ears 1 evenly arranged (welded), and the waist position of the third filter screen 403 is surrounded by multiple support ears 2 evenly arranged (welded). The inner wall surface of the inner cavity of the filter body 1 is surrounded by multiple support ears 3 evenly arranged (welded), and the first filter screen 401 is located on the support ear 1 of the waist of the second filter screen 402, and the second filter screen 402 is located on the support ear 2 of the waist of the third filter screen 403, and the third filter screen 403 is located on the support ear 3 in the inner cavity of the filter body 1, so that an annular gap is formed between two adjacent filter screens 4. It is prevented that the two filter screens 4 are blocked when they are attached together.

[0025] In order to improve the overall stability of the multiple filter screens 4 in the filter, the maximum diameter of the bottom of each filter screen 4 is equal to the inner diameter of the inner cavity of the filter body 1, and a plurality of supporting ears 4 are circumferentially and evenly arranged (welded) at the waist position of the first layer of filter screen 401. At the same time, an annular tightening ring parallel to the lower end face of the pressure cover 301 (or parallel to the radial cross-section of the filter body 1) is arranged under the pressure cover 301. The tightening ring is fixedly connected to the lower end face (inner end face) of the pressure cover 301 through three columns, and the upper ends of the three columns are respectively and evenly fixedly connected (welded) to the lower end face (inner end face) of the pressure cover 301, and the lower ends are respectively and evenly fixed on the circular ring of the tightening ring. When the pressure cover 301 is tightly covered on the top opening of the filter body 1, the tightening ring just presses down on the supporting ear four of the first layer filter 401, the first layer filter 401 presses down on the supporting ear one of the second filter, the second layer filter 402 presses down on the supporting ear two of the third filter, and the third layer filter 403 presses down on the supporting ear three of the filter body 1, so that the first layer filter 401, the second layer filter 402, the third layer filter 403 and the fourth layer filter remain stationary.

[0026] The above-mentioned gland assembly 3 is mainly composed of a gland 301, a buckle lock 302, a threaded rod 303, a gland handle 304, a support rod 305 and a hanging rod 307.

[0027] The gland 301 covers the opening at the top of the filter body 1 (in order to ensure sealing, a circle of annular grooves can be provided on the contact surface between the gland 301 and the opening at the top of the filter body 1, and an O-ring is placed in the annular groove). A plurality of snap locks 302 (the snap locks 302 are existing mature connecting parts) for fixing the gland 301 are provided (welded) between the gland 301 and the filter body 1.

[0028] A blind hole perpendicular to the top end face of the gland 301 is opened at the center position of the top end face of the gland 301 (this can be achieved by using existing mature hole-opening equipment). An internal thread is arranged in the blind hole on the top end face of the gland 301. In order to increase the length of the internal thread in the blind hole, a nut 309 can be welded at the edge of the blind hole. The internal thread of the nut 309 matches the external thread of the threaded rod 303.

[0029] One end of the threaded rod 303 is matched and screwed into the blind hole on the top surface of the gland 301, and the other end is fixedly connected to the gland handle 304.

[0030] The support rod 305 is provided with an internal thread hole matching the external thread of the threaded rod 303 at the middle position, and is sleeved onto the threaded rod 303. A hanging rod groove 306 is provided at each end.

[0031] There are two hanging rods 307, which are arranged symmetrically. One end of each hanging rod 307 is hingedly connected to the upper wall of the filter body 1, and the other end is configured to match the hook 308 of the hanging rod groove 306, so that the hook 308 can be hung in the corresponding hanging rod groove 306.

[0032] The cover handle 304 is rotated to rotate the threaded rod 303 away from the cover 301, so that the hanging rod groove 306 of the support rod 305 and the hook 308 of the hanging rod 307 are loosened, so that the cover 301 is opened from the top opening position of the filter body 1 to release the cover state.

[0033] The cover handle 304 is rotated to rotate the threaded rod 303 in the direction close to the cover 301, so that the hanging rod groove 306 of the support rod 305 and the hook 308 of the hanging rod 307 are tightened, so that the cover 301 is tightly covered at the opening position at the top of the filter body 1, and the covering action is completed. In conjunction with the buckle lock 302, double compression protection is achieved.

[0034] The filter further comprises a reverse blowing head 5, which is mainly composed of a core 501 and a transition pipe 502.

[0035] The core body 501 is a cylinder, in which a blowing cavity is provided, and a plurality of reverse blowing holes 503 connected to the blowing cavity are evenly provided on the outer peripheral wall of the upper section in a circumferential direction, and an annular protrusion is provided on the outer peripheral wall of the lower section, and a sampling hole 504 connected to the blowing cavity is provided on the end surface of the bottom end, and the orifice of the sampling hole 504 is connected to a sampling tube 505, and a ball valve 506 for on-off function is provided on the sampling tube 505,

[0036] The upper end of the transition pipe 502 is arranged at the bottom of the filter body 1, and the upper end channel opening extends upward and is connected with the inner cavity of the filter body 1 (a through hole connected with the upper end channel opening of the transition pipe 502 is opened on the inner bottom surface of the inner cavity of the filter body 1, and then connected together by welding, or an internal thread is set on the through hole opened on the inner bottom surface of the inner cavity of the filter body 1, and an external thread matching the internal thread is set on the outer peripheral wall of the upper end channel opening of the transition pipe 502, and they are screwed together), and the lower end is sleeved The core 501 is provided (the middle section of the core 501 is embedded in the lower end of the transition pipe 502, or the middle section of the core 501 and the lower end of the transition pipe 502 are integrally formed, or the middle section of the core 501 is welded to the opening of the lower end of the transition pipe 502), the annular protrusion on the outer peripheral wall of the core 501 matches with the annular groove on the inner peripheral wall of the transition pipe 502, and is fixed and sealed, and the lower end channel of the transition pipe 502 is connected with the reverse blowing hole 503 of the core 501. On the one hand, the cement ash sample is taken out through the sampling tube 505 to realize the sampling of the filtered cement ash in the filter body, and on the other hand, the sampling tube 505 can be connected to an external high-pressure gas source to solve the problem of difficult cleaning of cement ash in the entire filter and other components connected to the filter, and to avoid the accumulation of cement ash with residual agents after long-term cleaning, which will cause erosion to the filter and other components connected to the filter.

[0037] When sampling, just open the ball valve 506 directly. When cleaning, connect the sampling tube 505 to the high-pressure gas source, the gas source passes through the sampling tube 505, and then passes through the core 501 of the reverse blowing head 5, and the gas source is blown into the inner cavity of the filter body 1 evenly and dispersedly from the reverse blowing hole 503 on the core 501 (the cleaning effect is better when the gas source is blown evenly), and the filter and other connected devices of the filter are cleaned with high pressure.

[0038] The root of the support frame 2 is provided with wheels 201 (universal wheels are selected). The outer peripheral wall surface of the filter body 1 is provided with a push handle 6 to increase the mobility of the filter and solve the problem that the filter is too heavy and cannot be moved.

[0039] The above specific technical solutions are only used to illustrate the present invention, not to limit it. Although the present invention is described in detail with reference to the above specific technical solutions, ordinary technicians in the field should understand that they can still modify the above specific technical solutions, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the present invention.

Claims

1. A cement ash filter, characterized in that: The filter comprises a filter body, a support frame, a gland assembly and a filter screen. The filter body is arranged vertically by a support frame, and has an inner cavity with an opening at the top, the opening at the top of the inner cavity is sealed by a gland assembly, the lower wall surface is provided with an ash inlet connected to the inner cavity, the upper wall surface is provided with an ash outlet connected to the inner cavity, and a multi-layer, conical or truncated cone-shaped filter screen is provided in the inner cavity between the ash inlet and the ash outlet. The cement ash enters the filter body through the ash inlet, flows through the filter screen for filtration, and is discharged from the ash outlet; The filter screen is composed of three layers, namely, a first filter screen layer, a second filter screen layer and a third filter screen layer, and the three filter screen layers are stacked together from top to bottom, a plurality of support ears 1 are circumferentially and evenly arranged at the waist position of the second filter screen layer, a plurality of support ears 2 are circumferentially and evenly arranged at the waist position of the third filter screen layer, a plurality of support ears 3 are circumferentially and evenly arranged on the inner wall surface of the inner cavity of the filter body, the first filter screen layer is seated on the support ear 1 at the waist of the second filter screen layer, the second filter screen layer is seated on the support ear 2 at the waist of the third filter screen layer, and the third filter screen layer is seated on the support ear 3 in the inner cavity of the filter body, so that an annular gap is formed between two adjacent filter screens; The gland assembly is mainly composed of a gland, a buckle lock, a threaded rod, a gland handle, a support rod and a hanging rod. The gland is covered on the opening at the top of the filter body, and a plurality of buckle locks are arranged between the gland and the filter body to fix the gland. A blind hole perpendicular to the top end face of the gland is provided at the center of the top end face of the gland, and an internal thread is provided in the blind hole of the top end face of the gland. One end of the threaded rod is matched and screwed into the blind hole on the top surface of the gland, and the other end is fixedly connected to the gland handle. An internal threaded hole matching the external thread of the threaded rod is arranged in the middle of the support rod, which is sleeved on the threaded rod, and a hanging rod groove is arranged at each end of the two ends. There are two hanging rods, which are arranged symmetrically. One end of each hanging rod is hingedly connected to the wall surface of the upper section of the filter body, and the other end is configured as a hook that matches the hanging rod groove and enables the hook to be hung in the corresponding hook groove. Rotate the cover handle to rotate the threaded rod away from the cover, so that the hanging rod groove of the support rod and the hook of the hanging rod are loosened, so that the cover is opened from the top opening of the filter body to release the cover. Rotate the cover handle to screw the threaded rod in the direction close to the cover, so that the hanging rod groove of the support rod and the hook of the hanging rod are tightened, so that the cover is tightly covered at the opening position on the top of the filter body to complete the covering action; An annular tightening ring parallel to the lower end surface of the gland is arranged below the gland, and the tightening ring is fixedly connected to the lower end surface of the gland by three columns. When the gland is tightly covered on the top opening of the filter body, the tightening ring is pressed downwardly against the supporting ear four of the first layer of filter screen, the first layer of filter screen is pressed downwardly against the supporting ear one of the second layer of filter screen, the second layer of filter screen is pressed downwardly against the supporting ear two of the third layer of filter screen, and the third layer of filter screen is pressed downwardly against the supporting ear three of the filter body, so that the first layer of filter screen, the second layer of filter screen, the third layer of filter screen and the fourth layer of filter screen remain stationary.

2. The cement ash filter according to claim 1, characterized in that: The filter also includes a back-blowing head, The reverse blowing head is mainly composed of a core body and a transition pipe. The core body is a cylinder, a blowing cavity is provided in the cylinder, a plurality of reverse blowing holes connected to the blowing cavity are evenly provided on the outer peripheral wall of the upper section in a circumferential direction, an annular protrusion is provided on the outer peripheral wall of the lower section, a sampling hole connected to the blowing cavity is provided on the end surface of the bottom end, the orifice of the sampling hole is connected to the sampling tube, and a ball valve for on-off function is provided on the sampling tube, The upper end portion of the transition pipe is arranged at the bottom of the filter body in a detachable structure, the upper end channel opening extends upward and is connected with the inner cavity of the filter body, the lower end portion is sleeved with the core body, the annular protrusion on the outer peripheral wall of the core body matches with the annular groove on the inner peripheral wall of the transition pipe, and is fixed and sealed, and the lower end channel opening of the transition pipe is connected with the back-blowing hole of the core body.

3. The cement ash filter according to claim 1, characterized in that: The root of the support frame is provided with wheels.

4. The cement ash filter according to claim 1, characterized in that: A push handle is arranged on the outer peripheral wall surface of the filter body.

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