Improved back pressure plate

Abstract

The invention discloses an improved back pressure plate in the technical field of dehydrators. The improved back pressure plate comprises a back pressure plate sealing plate, a sealing plate adjusting component and an incomplete sealing plate, the backpressure plate sealing plate is mounted at a sludge outlet of a sludge outlet box of the dehydrator, and is provided with a plurality of groups of through holes through which the spiral shaft penetrates; a plurality of groups of sealing plate adjusting components are arranged, are respectively mounted between the corners of the back pressure plate sealing plate and the sludge outlet box, and are used for adjusting the distance between the back pressure plate sealing plate and the sludge outlet; a plurality of groups of incomplete sealing plates are arranged, and the number of the incomplete sealing plates is equal to that of spiral shafts of the dehydrator; by means of the incomplete sealing plate installed on the spiral shaft, the mud outlet in the tail end is in a periodic covering and opening state, it is ensured that the pressure in all positions is moderate, the situation that a mud cake is too wet due to insufficient pressure is avoided, the blocking problem caused by too large pressure is also prevented, and the mud cake is prevented from being blocked through rotation of the incomplete sealing plate. And extruded mud cakes can be scraped in time, and continuous and efficient operation of equipment is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of dehydrators, in particular to an improved back pressure plate. Background Art

[0002] The laminated spiral sludge dewatering machine is a highly efficient sludge treatment equipment, which is widely used in sludge treatment in municipal sewage, food, beverage, chemical, leather, welding materials, papermaking, printing and dyeing, pharmaceutical and other industries. Its working principle is: when the spiral driving shaft rotates, the multiple solid and active laminates arranged on the periphery of the driving shaft move relatively, and under the action of gravity, the water is filtered out from the gap between the relatively moving laminates to achieve rapid concentration. The concentrated sludge moves forward continuously with the rotation of the spiral shaft; along the direction of the mud cake outlet, the pitch of the spiral shaft gradually decreases, the gap between the rings also gradually decreases, and the volume of the spiral cavity continues to shrink; under the action of the back pressure plate at the outlet, the internal pressure gradually increases, and under the continuous operation of the spiral driving shaft, the water in the sludge is squeezed out, and the solid content of the filter cake continues to increase, and finally the continuous dehydration of the sludge is achieved.

[0003] The double-axis stacked spiral sludge dewatering machine has the following problems: due to the staggered arrangement of the two spiral shafts, the two sets of back pressure plates at the end will be in the front and rear positions. The back pressure plate close to the mud outlet will over-squeeze the sludge, causing the mud cakes and mud blocks in the cavity to become compacted and the mud discharge to be unsmooth, thus affecting the sludge processing volume. The gap of the other back pressure plate is larger, the pressure is insufficient, and the water content is high. The water content and processing volume of the sludge coming out of the two back pressure plates are different. Since the traditional back pressure plates are directly fixed to the spiral shafts by bolts, during long-term use, the back pressure plates are prone to move backwards, making the gap between the back pressure plates and the mud outlet too large, affecting the normal use of the dewatering machine.

[0004] Based on this, the present invention designs an improved back pressure plate to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide an improved back pressure plate to solve the problem raised in the above background technology that due to the staggered arrangement of the two spiral shafts, the two groups of back pressure plates at the end will be in the front and rear positions and staggered. The back pressure plate close to the mud outlet will excessively squeeze the sludge, causing the mud cakes and mud blocks in the cavity to become compacted and the mud discharge to be not smooth, thereby affecting the sludge processing volume. The gap of the other back pressure plate is larger, the pressure is insufficient, the water content is high, and the water content and processing volume of the sludge coming out of the two back pressure plates are different.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: an improved back pressure plate, comprising a back pressure plate sealing plate, a sealing plate adjusting component and an incomplete sealing plate;

[0007] The back pressure plate sealing plate is installed at the mud outlet of the mud box of the dewatering machine, and is provided with a plurality of through holes penetrated by the spiral shaft;

[0008] The sealing plate adjusting components are provided in several groups, which are respectively installed between the corners of the back pressure plate sealing plate and the mud outlet box, and are used to adjust the distance between the back pressure plate sealing plate and the mud outlet;

[0009] The incomplete sealing plates are provided with several groups, the number of which is equal to the number of the spiral shafts of the dehydrator. The several groups of incomplete sealing plates are respectively sleeved and installed on the corresponding spiral shafts, and their installation positions are located between the back pressure plate sealing plate and the mud outlet of the mud box.

[0010] Preferably, the plurality of incomplete sealing plates are all eccentric circles or ellipses, and when adjacent incomplete sealing plates rotate, the spacings between them approach zero and are always equal.

[0011] Preferably, the incomplete sealing plate comprises an incomplete sealing plate body and a sleeve fixing portion, the sleeve fixing portion is fixed to the spiral shaft of the dehydrator, and the contact surface between the fixing portion and the spiral shaft is provided with anti-slip texture.

[0012] Preferably, the sleeve fixing portion is of a split type, and the split sleeve fixing portion is composed of two semicircular rings with side wings, and is fixed by locking bolts at the side wing positions.

[0013] Preferably, the sealing plate adjusting component includes a spring sleeve fixedly connected to the dewatering machine mud outlet box, a pipe sleeve is inserted in the spring sleeve, the outer end face of the pipe sleeve abuts against the back pressure plate sealing plate, the inner cavity of the spring sleeve is provided with a long bolt passing through the back pressure plate sealing plate, the pipe sleeve and the spring sleeve, the end of the long bolt is threaded with a nut abutting against the outer end face of the spring sleeve, and the inner cavity of the sealing plate adjusting component is provided with a spring supporting the passing through the pipe sleeve.

[0014] Preferably, the sealing plate adjusting component is an electric push rod, and both ends of the electric push rod are hinged between the inner cavity wall of the mud discharge box and the back pressure plate sealing plate.

[0015] Preferably, it also includes a displacement sensor installed on the wall of the mud discharge box, and the detection end of the displacement sensor is fixedly connected to the back pressure plate sealing plate.

[0016] Preferably, the back pressure plate sealing plate includes an upper back pressure sealing plate and a lower back pressure sealing plate. The upper back pressure sealing plate is provided with an upper arc-shaped lower notch. The lower back pressure sealing plate is fixed with a lower arc-shaped clamping block. The upper arc-shaped lower notch and the lower arc-shaped clamping block form a through hole for the spiral shaft to pass through. The upper back pressure sealing plate and the lower back pressure sealing plate can be formed by splicing together with bolts and nuts.

[0017] Compared with the prior art, the beneficial effects of the present invention are: the present invention has a novel structure and is suitable for dewatering machines. By installing an incomplete sealing plate on the spiral shaft, the mud outlet at the end is periodically covered and opened, which ensures that the pressure is moderate everywhere, avoiding the mud cake being too wet due to insufficient pressure and preventing blockage problems caused by excessive pressure. Moreover, through the rotation of the incomplete sealing plate, the squeezed mud cake can be scraped off in time to ensure the continuous and efficient operation of the equipment. The incomplete sealing plate is fixed by locking itself with the spiral shaft and the back pressure plate sealing plate limits its extreme position, which can avoid serious deviation of the incomplete sealing plate after slipping and affect the normal operation of the dewatering machine.

[0018] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of a spring-type structure of the sealing plate adjustment component of the present invention;

[0021] Figure 2 The sealing plate adjustment member of the present invention is a spring-type explosion diagram;

[0022] Figure 3 This is a schematic diagram of the split incomplete plate sealing structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the back pressure plate sealing structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the split back pressure plate sealing structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure in which the sealing plate adjustment component of the present invention is an electric push rod;

[0026] Figure 7 The exploded view of the sealing plate adjusting member of the present invention is an electric push rod;

[0027] Figure 8 This is a schematic diagram of the back pressure plate sealing structure in which the sealing plate adjusting member of the present invention is an electric push rod;

[0028] Fig. 9 This is a schematic diagram of the structure in which the incomplete sealing plate of the present invention is elliptical;

[0029] Fig.10It is a schematic diagram of the structure in which the incomplete sealing plate of the present invention is an eccentric circle.

[0030] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0031] 1-back pressure plate sealing plate, 11-back pressure upper sealing plate, 12-back pressure lower sealing plate, 13-upper arc lower notch, 14-lower arc block, 2-sealing plate adjusting component, 21-spring sleeve, 22-pipe sleeve, 23-long bolt, 24-spring, 25-electric push rod, 3-incomplete sealing plate, 31-incomplete sealing plate body, 32-sleeve fixing part, 4-displacement sensor. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Embodiment 1:

[0034] See also Figure 1-5 , Figure 9-10 , the present invention provides a technical solution for an improved back pressure plate: an improved back pressure plate, an improved back pressure plate, comprising a back pressure plate sealing plate 1, a sealing plate adjusting component 2 and an incomplete sealing plate 3;

[0035] The back pressure plate sealing plate 1 is installed at the mud outlet of the mud box of the dewatering machine, and is provided with a plurality of through holes penetrated by the spiral shaft;

[0036] The sealing plate adjusting components 2 are provided in several groups, which are respectively installed between the corners of the back pressure plate sealing plate 1 and the mud outlet box, and are used to adjust the distance between the back pressure plate sealing plate 1 and the mud outlet;

[0037] The incomplete sealing plates 3 are provided with several groups, the number of which is equal to the number of the spiral shafts of the dehydrator. Several groups of incomplete sealing plates 3 are respectively sleeved and installed on the corresponding spiral shafts, and their installation positions are located between the back pressure plate sealing plate 1 and the mud outlet of the mud box.

[0038] Furthermore, the plurality of incomplete sealing plates 3 are all eccentric circles or ellipses, and when adjacent incomplete sealing plates 3 rotate, the spacings therebetween approach zero and are always equal.

[0039] Furthermore, the incomplete sealing plate 3 includes an incomplete sealing plate body 31 and a sleeve fixing portion 32, the sleeve fixing portion 32 is fixed to the spiral shaft of the dehydrator by bolts, and the contact surface between the fixing portion 32 and the spiral shaft is provided with anti-slip textures.

[0040] Furthermore, the sleeve fixing portion 32 is of a split type, and the split sleeve fixing portion 32 is composed of two semicircular rings with side wings, and is fixed by locking bolts at the side wing positions.

[0041] Furthermore, the sealing plate adjusting member 2 includes a spring sleeve 21 fixedly connected to the dewatering machine mud box, a pipe sleeve 22 is inserted into the spring sleeve 21, the outer end face of the pipe sleeve 22 abuts against the back pressure plate sealing plate 1, the inner cavity of the spring sleeve 21 is provided with a long bolt 23 that passes through the back pressure plate sealing plate 1, the pipe sleeve 22 and the spring sleeve 21, the end of the long bolt 23 is threaded with a nut that abuts against the outer end face of the spring sleeve 21, and the inner cavity of the sealing plate adjusting member 2 is provided with a spring 24 that supports the pipe sleeve 22. By adjusting the nut at the end of the long bolt 23, the spring 24 always provides support, and the position of the maximum gap of the back pressure plate sealing plate 1 can be adjusted;

[0042] Furthermore, the back pressure plate sealing plate 1 comprises a back pressure upper sealing plate 11 and a back pressure lower sealing plate 12, the back pressure upper sealing plate 11 is provided with an upper arc-shaped lower notch 13, the back pressure lower sealing plate 12 is fixed with a lower arc-shaped clamping block 14, the upper arc-shaped lower notch 13 and the lower arc-shaped clamping block 14 enclose a through hole for the spiral shaft to pass through, and the back pressure upper sealing plate 11 and the back pressure lower sealing plate 12 can be spliced ​​and formed by bolts and nuts. This method is convenient for disassembly and assembly of the back pressure plate sealing plate 1.

[0043] Embodiment 2:

[0044] See also Figure 3 , Figure 5-10 , the present invention provides a technical solution for an improved back pressure plate: an improved back pressure plate, an improved back pressure plate, comprising a back pressure plate sealing plate 1, a sealing plate adjusting component 2 and an incomplete sealing plate 3;

[0045] The back pressure plate sealing plate 1 is installed at the mud outlet of the mud box of the dewatering machine, and is provided with a plurality of through holes penetrated by the spiral shaft;

[0046] The sealing plate adjusting components 2 are provided in several groups, which are respectively installed between the corners of the back pressure plate sealing plate 1 and the mud outlet box, and are used to adjust the distance between the back pressure plate sealing plate 1 and the mud outlet;

[0047] The incomplete sealing plates 3 are provided with several groups, the number of which is equal to the number of the spiral shafts of the dehydrator. Several groups of incomplete sealing plates 3 are respectively sleeved and installed on the corresponding spiral shafts, and their installation positions are located between the back pressure plate sealing plate 1 and the mud outlet of the mud box.

[0048] Furthermore, the plurality of incomplete sealing plates 3 are all eccentric circles or ellipses, and when adjacent incomplete sealing plates 3 rotate, the spacings therebetween approach zero and are always equal.

[0049] Furthermore, the incomplete sealing plate 3 includes an incomplete sealing plate main body 31 and a sleeve fixing part 32, the sleeve fixing part 32 is fixed to the screw shaft of the dehydrator by bolts, and the contact surface between the fixing part 32 and the screw shaft is provided with anti-slip grooves, which effectively enhances the friction and stability between the components, greatly reduces the possibility of displacement, and ensures the reliability and stability of the entire dehydrator during operation.

[0050] Further, the sealing plate adjusting member 2 is an electric push rod 25, and both ends of the electric push rod 25 are hinged between the inner wall of the mud discharge box and the back pressure plate sealing plate 1. By controlling the electric push rod 25, the position of the back pressure plate sealing plate 1 can be adjusted, saving time and effort.

[0051] Furthermore, it also includes a displacement sensor 4 installed on the wall of the mud discharge box, and the detection end of the displacement sensor 4 is fixedly connected to the back pressure plate sealing plate 1. It is used to detect the extension length of the telescopic end of the electric push rod 25, so as to facilitate the staff to adjust and control.

[0052] A specific application of this embodiment is: the present invention is an improved back pressure plate, when in use, when the mud cake moves to the end, the incomplete sealing plate 3 applies a balanced pressure to the cavity at the end. At this time, the mud outlet at the end is periodically covered and opened, which ensures that the pressure is moderate everywhere, avoiding the mud cake from being too wet due to insufficient pressure and preventing the blockage problem caused by excessive pressure.

[0053] The back pressure plate sealing plate 1 can further exert reverse pressure on the sludge, and even if the incomplete sealing plate 3 fails to completely block the outlet at a certain moment, it can effectively maintain the low moisture content of the sludge. In addition, the rotation of the incomplete sealing plate 3 can timely scrape off the squeezed mud cake to ensure the continuous and efficient operation of the equipment.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0055] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An improved back pressure plate, characterized in that: It comprises a back pressure plate sealing plate (1), a sealing plate adjusting component (2) and an incomplete sealing plate (3); The back pressure plate sealing plate (1) is installed at the mud outlet of the mud box of the dewatering machine, and is provided with a plurality of through holes penetrated by the spiral shaft; The sealing plate adjusting components (2) are provided with a plurality of groups, which are respectively installed between the corners of the back pressure plate sealing plate (1) and the mud outlet box, and are used to adjust the distance between the back pressure plate sealing plate (1) and the mud outlet; The incomplete sealing plates (3) are provided in a plurality of groups, the number of which is equal to the number of the screw shafts of the dehydrator. The plurality of incomplete sealing plates (3) are respectively sleeved and installed on the corresponding screw shafts, and their installation positions are located between the back pressure plate sealing plate (1) and the mud outlet of the mud outlet box.

2. The improved back pressure plate according to claim 1, characterized in that: The plurality of incomplete sealing plates (3) are all eccentrically circular or elliptical, and when adjacent incomplete sealing plates (3) rotate, the spacing between them approaches zero and is always equal.

3. An improved back pressure plate according to claim 2, characterized in that: The incomplete sealing plate (3) comprises an incomplete sealing plate body (31) and a sleeve fixing portion (32), wherein the sleeve fixing portion (32) is fixed to the spiral shaft of the dehydrator, and the sleeve fixing portion (32) is of a split type. The split sleeve fixing portion (32) is composed of two semicircular rings with side wings, and is fixed by locking bolts at the side wing positions.

4. The improved back pressure plate according to claim 3, characterized in that: The contact surface between the fixing portion (32) and the spiral shaft is provided with anti-slip textures.

5. The improved back pressure plate according to claim 1, characterized in that: The sealing plate adjusting component (2) comprises a spring sleeve (21) fixedly connected to the dewatering machine mud box, a pipe sleeve (22) is inserted into the spring sleeve (21), the outer end face of the pipe sleeve (22) abuts against the back pressure plate sealing plate (1), the inner cavity of the spring sleeve (21) is provided with a long bolt (23) passing through the back pressure plate sealing plate (1), the pipe sleeve (22) and the spring sleeve (21), the end of the long bolt (23) is threadedly connected with a nut abutting against the outer end face of the spring sleeve (21), and the inner cavity of the sealing plate adjusting component (2) is provided with a spring (24) supporting the passing through the pipe sleeve (22).

6. The improved back pressure plate according to claim 1, characterized in that: The sealing plate adjusting component (2) is an electric push rod (25), and the two ends of the electric push rod (25) are hinged between the inner cavity wall of the mud discharge box and the back pressure plate sealing plate (1).

7. An improved back pressure plate according to claim 6, characterized in that: It also comprises a displacement sensor (4) installed on the wall of the mud discharge box, wherein the detection end of the displacement sensor (4) is fixedly connected to the back pressure plate sealing plate (1).

8. The improved back pressure plate according to claim 1, characterized in that: The back pressure plate sealing plate (1) comprises an upper back pressure sealing plate (11) and a lower back pressure sealing plate (12); an upper arc-shaped lower notch (114) is provided on the upper back pressure sealing plate (11); a lower arc-shaped clamping block (114) is fixedly connected to the lower back pressure sealing plate (12); the upper arc-shaped lower notch (114) and the lower arc-shaped clamping block (114) form a through hole through which the spiral shaft can pass; the upper back pressure sealing plate (11) and the lower back pressure sealing plate (12) can be spliced ​​and formed by bolts and nuts.

Images